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    • 专利摘要:
    The invention relates to a power transmission belt and a method of manufacturing this belt. The belt comprises: - a back layer (10) made of a material with elastomeric behavior; - a ventral layer (20) made of a material with elastomeric behavior; - A means (30) for mechanical reinforcement, for example of thermoplastic material, interposed between the back layer (10) and the ventral layer (20); characterized in that it comprises a thermoplastic transformation film (40) surrounding the mechanical reinforcing means (30), said film (40) comprising at least: a first component physically and / or chemically bonded with at least one component of the backing layer (10); a second component physically and / or chemically bonded with at least one component of the mechanical reinforcing means (30); and a third component physically and / or chemically bonded with at least one component of the ventral layer (20). The manufacturing process of this belt may advantageously implement a self-gripping means.
    公开号:FR3019609A1
    申请号:FR1452959
    申请日:2014-04-03
    公开日:2015-10-09
    发明作者:Elsa Franchini；Julie Rognon
    申请人:Hutchinson SA；
    IPC主号:
    专利说明:

    [0001] The present invention relates to the field of power transmission belts. Such a belt generally comprises a backing layer 1, a ventral layer 2 and a means 3 of mechanical reinforcement (Figure 1). The ventral layer 2, in this case ribbed, is intended to be placed in contact with pulleys. For example, in the automotive field, a belt can be mounted on a first pulley connected to the motor shaft and on a second pulley connected to an alternator.
    [0002] The means 3 of mechanical reinforcement is generally a multi-wire cord, although other types of reinforcement are possible such as a woven reinforcement, a knitted reinforcement or other. In general, the means 3 of mechanical reinforcement makes it possible to ensure the power transmission of the belt. It is most often formed of a material, such as polyesters (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), aromatic polyester (PEAR)), polyamide, aramid (aromatic polyamide) or glass fibers. The backing layer 1 and the ventral layer 2 may be made of an elastomeric material based on ethylene alpha olefin (rubber).
    [0003] In order to manufacture such a belt, the main steps are as follows: a ') the backing layer 1, the mechanical reinforcing means 3 and the ventral layer 2 are stacked to produce an uncured belt blank; then, b ') a vulcanization of the blank is performed in a mold to secure the different layers of the blank belt; In order to ensure cohesion between the backing layer 1, the mechanical reinforcing means 3 and the ventral layer 2 after vulcanization, a Resorcinol Formaldehyde Latex adhesive (RFL, referenced 4) is deposited on the cord before step a '). The RFL is obtained by condensation of an aqueous phase preparation (liquid solution) based on thermosetting resin and latex. After drying, the elastomeric phase of the latex is bonded with the thermosetting resin (the RFL thus forms an interpenetrating elastomer / thermosetting resin network), and then allows adhesion to the reinforcement means 3. When the mechanical reinforcing means 3 is presented under In the form of a cord made of several wires, the RFL also makes it possible to ensure external cohesion between the different wires. The vulcanization of the whole (components 1, 2, 3 and 4) allows the final cohesion. Indeed, during the vulcanization of the belt, the vulcanization ingredients of the rubbers (ventral layer 1 and dorsal layer 2) migrate into the elastomeric phase of the RFL, crosslink the RFL to finally create an adhesion between these backing layer 1 and the ventral layer 2 with the reinforcement means 3, previously treated by the RFL. The presence of an RFL-type glue is today essential to ensure the cohesion of the belt and ensure a satisfactory life. However, the presence of formaldehyde in the RFL poses difficulties today given the environmental constraints. Indeed, belt manufacturers seek to overcome formaldehyde-based RFL, while maintaining the particularly advantageous mechanical properties that they confer on the life of a belt. An object of the invention is thus to provide a power transmission belt limiting the presence of RFL at the mechanical reinforcing means 20, or even suppressing this presence. Another object of the invention is to provide a method of manufacturing such a belt. To solve at least one of these objectives, the invention proposes a power transmission belt comprising: a backing layer made of a material with elastomeric behavior; a ventral layer made of a material with elastomeric behavior; a mechanical reinforcement means, for example made of thermoplastic material, interposed between the backing layer and the ventral layer; characterized in that it comprises a thermoplastic transformation film surrounding the mechanical reinforcing means, said film comprising at least: a first component physically and / or chemically bonded with at least one component of the backing layer; a second component physically and / or chemically bonded with at least one component of the mechanical reinforcing means; and a third component physically and / or chemically bound with at least one component of the ventral layer.
    [0004] The invention may also comprise at least one of the following characteristics, taken alone or in combination: the backing layer is made of a material with an elastomeric behavior based on ethylene alpha olefin or based on an olefinic TPV and the first component of the thermoplastically processable film is selected from olefin homopolymers or copolymers, for example polyethylene such as LDPE or HDPE; the backing layer is made of a material with an elastomeric behavior based on polybutadiene (BR) or on the basis of styrene-butadiene copolymer (SBR) and in that the first component of the thermoplastic transformation film is chosen from styrenic homopolymers or copolymers for example polystyrene-b-poly (ethylenebutylene) -b-polystyrene (SEBS) and / or polystyrene-b-polybutadiene-bpolystyrene (SBS); the backing layer is made of a material with an elastomeric behavior based on polyisoprene or based on natural rubber (NR) and in that the first component of the thermoplastically processable film is polystyrene-b-polyisoprene-b-polystyrene (SIS) ); the backing layer is made of an elastomeric material based on an ether block copolymer (COPE) and in that the first component of the thermoplastically processable film is also an ether block copolymer (COPE) ); the backing layer is made of a material with an elastomeric behavior based on an ether block and amide copolymer (COPA) and in that the first component of the thermoplastically processable film is also an ether / amide block copolymer (COPA) ); the mechanical reinforcing means is made of a material chosen from a polyamide, a polyester, glass fibers or a cellulosic material and in that the second component of the thermoplastic transformation film comprises a material chosen from a polymer containing at least one olefinic constituent unit and a reactive functional group selected from a maleic anhydride function, a glycidyl methacrylate function, an acrylic acid function; the olefinic constituent unit of said polymer containing at least one olefinic constituent unit and a reactive functional group chosen from a maleic anhydride function, a glycidyl methacrylate function and an acrylic acid function is ethylene; the mechanical reinforcing means is made of polyamide and in that the second component of the thermoplastic transformation film comprises an ether block copolymer and amide (COPA); - The mechanical reinforcing means is made of polyester and in that the second component of the thermoplastic transformation film comprises an ether block copolymer and ester (COPE); the ventral layer is made of an elastomeric material based on ethylene alpha olefin or on the basis of an olefinic TPV and in that the third component of the thermoplastic transformation film is chosen from olefin homopolymers or copolymers for example polyethylene such as LDPE or HDPE; the ventral layer is made of an elastomeric material based on polybutadiene (BR) or based on styrene-butadiene copolymer (SBR) and in that the third component of the thermoplastically-processed film is chosen from homoplymers or copolymers styrenics, for example polystyrene-b-poly (ethylenebutylene) -b-polystyrene (SEBS) and / or polystyrene-b-polybutadiene-b-polystyrene (SBS); the ventral layer is made of a material with an elastomeric behavior based on polyisoprene or based on natural rubber (NR) and in that the third component of the thermoplastically-processed film is polystyrene-b-polyisoprene-b-polystyrene (SIS) ); The ventral layer is made of a material with an elastomeric behavior based on an ether block and ester block copolymer (COPE) and in that the third component of the thermoplastically processable film is also an ether block and ester block copolymer (COPE) ); the ventral layer is made of an elastomeric material based on an ether block and amide copolymer (COPA) and in that the third component of the thermoplastically processable film is also an ether / amide block copolymer (COPA) ); - The back layer and the ventral layer are made of a material with identical elastomeric behavior; The dorsal layer and the ventral layer are made of a material with elastomeric behavior based on ethylene alpha olefin; the mechanical reinforcing means is made of polyamide; the thermoplastic transformation film comprises a first component formed of an olefin homopolymer or copolymer, a second component formed of an ether block copolymer and amide (COPA) and / or a polymer containing at least one olefinic constitutive unit and a reactive functional group selected from a maleic anhydride function, a glycidyl methacrylate function, an acrylic acid function; a third component formed of an olefin homopolymer or copolymer; the polyamide is chosen from: PA66, PA46, PA6, aromatic polyamide; the mechanical reinforcement means is a multi-son cord, a woven fabric, a nonwoven fabric or a knit fabric; the bond between the thermoplastically processed film and at least one of the dorsal layer or the ventral layer involves a chemical bond by co-crosslinking; the belt further comprises: a thermoplastic-processing complementary film covering the ventral layer and, a textile layer covering the complementary film, the complementary film comprising: a first component physically and / or chemically bonded with at least one component the ventral layer; a second component physically and / or chemically bonded with at least one component of the textile layer; the bond between the complementary film and the ventral layer involves a chemical bond by co-crosslinking. To achieve at least one of these objectives, the invention also provides a method of manufacturing a power transmission belt, characterized in that it comprises the following steps: a) arrange, in the state green, a stack comprising: - a so-called dorsal layer; - a first thermoplastically processable film, doubling the backing layer, and comprising a component capable, during step b "), of creating a physical and / or chemical bond with at least one component of the backing layer and another component capable, during step b "), of creating a physical and / or chemical bond with at least one component of a mechanical reinforcing means, for example a thermoplastic material - the mechanical reinforcing means - a so-called ventral layer - a second thermoplastically processable film, doubling the ventral layer, and comprising a component capable of creating a physical and / or chemical bond with at least one component of the ventral wand and another component capable of creating a physical and / or chemical bond with at least one component of the mechanical reinforcing means; this stack forming a belt blank; b ") molding and vulcanizing the belt blank, this step involving the formation of a thermoplastic film surrounding the mechanical reinforcing means from the fluidification of said first and second films to ensure the physical and / or chemical connection between said film thermoplastic transformation on the one hand and the back layer, the ventral layer and the mechanical reinforcement means on the other hand.The method may furthermore comprise the following steps: at least one of the two transformation films thermoplastic has self-gripping means for improving the mechanical attachment of the mechanical reinforcing means, in particular when this mechanical reinforcing means is a multi-wire cord; - the two films with thermoplastic transformation have self-gripping means oriented in the direction mechanical reinforcement means The invention will be better understood and other objects, advantages and features thereof will appear more clearly The following description is made with reference to the accompanying drawings, in which: FIG. 2 represents a sectional view of a belt according to the invention, obtained after manufacture. - Figure 3 shows, in a sectional view, a representative diagram of a blank of the belt of Figure 2 before vulcanization (raw state), namely during manufacture; - Figure 4 shows a longitudinal sectional view of a blank of the belt of Figure 2, the blank being in accordance with the diagram shown in Figure 3; Figure 5 shows a cross-sectional view of Figure 4 taken at a sectional plane A-A; - Figure 6 shows, in a schematic view, the blank of Figure 4 in a partial perspective view; - Figure 7 is a diagram according to the diagram of Figure 3, on which are specified different possible materials; - Figure 8 shows, in a sectional view, a representative diagram of a blank belt similar to that of Figure 2, but further comprising an outer textile layer covering the ventral layer and intended to be in contact with pulleys d a training system. A power transmission belt according to the invention is shown in FIG. 2. It comprises a backing layer 10 made of an ethylene alpha olefin-based elastomeric material (on the basis of which it should be understood that the backing layer comprises at least 30% by weight of ethylene alpha olefin), a belly layer 20 made of an ethylene alpha olefin-based elastomeric material (the base of the belly layer 20 is therefore identical to the base of the layer dorsal 10), in this case a ribbed form, a means 30 of mechanical reinforcement, for example of thermoplastic material, embedded or interposed between the back layer 10 and the ventral layer 20 and a thermoplastic-processing film 40 surrounding the means 30 mechanical reinforcement. By thermoplastic transformation film 40 is meant a film 40 formed of a material chosen from thermoplastics (TP), thermoplastic alloys, elastomeric thermoplastics (TPE) or TPVs which are elastomeric thermoplastics where the elastomeric phase is crosslinked. The thermoplastically processed film 40 furthermore comprises at least: a first component physically and / or chemically bonded with at least one component of the backing layer 10; and a second component physically and / or chemically bonded with at least one component of the mechanical reinforcing means; a third component physically and / or chemically bonded with at least one component of the ventral layer 20. As a result, during vulcanization, adhesion, by physical and / or chemical bonding, is generated between the reinforcement means 30 and the film 40 on the one hand, and between this thermoplastically-processed film 40 and the ventral and dorsal layers 10. During the vulcanization, co-crosslinking by the vulcanizing ingredients of the layers 10 and 20, for example peroxides can complement the adhesion between these layers 10, 20 and the film 40 with thermoplastic processing. The life of the belt can then be comparable to a power transmission belt comprising an isocyanate treatment, an RFL and a preparation ensuring the manufacturing tights. The power transmission belt shown in FIG. 2 has the following composition. The backing layer 10 is made of EPDM. The ventral layer 20, ribbed, is made of EPDM. The mechanical reinforcing means 30 is a multi-wire cord whose wires are made of polyamide. The first component of the thermoplastically processed film 40 is a low density polyethylene (LDPE). The second component of the thermoplastically processed film 40 is known under the trade name PEBAX. It is an ether block amide copolymer (COPA) which contains an amide unit. The third component of the thermoplastically-processed film 40 is identical to the first component, which is conceivable because the dorsal and ventral layers 20 have the same base, in this case ethylene alpha olefin. Three preferred chemical compositions (CC) of the thermoplastically processed film 40 have been tested to verify the interest of the invention. They are summarized in Table 1. Composition of the film 40 CCl CC 2 CCl 3 LDPE (') / 0, by weight) 60 67 90 PEBAX (%, by weight) 40 33 10 30 Table 1 All these compositions (CCl, CCl, CCl3 ) have made it possible to obtain a belt such as that represented in FIG.
    [0005] More generally, the ventral and dorsal layers 10 can be made with any ethylene alpha olefin material, with EPDM being just one example in this family. The first component of thermoplastically processable film 40 (or what amounts to the same here, the third component of thermoplastically processed film 40), which is capable, upon vulcanization, of creating a physical and / or chemical bond with any ethylene alpha olefin-based material of the dorsal layer 10 (or ventral layer 20), such as EPDM, may be selected from homopolymers or copolymers of olefins. Advantageously, it may be a polyethylene, for example low density polyethylene (LDPE) or a high density polyethylene (HDPE for "High Density PolyEthylene" according to the English terminology). As for the second component of the thermoplastically processable film 40, which is capable, upon vulcanization, of creating a physical and / or chemical bond with the polyamide of the reinforcing means, may be selected from: (a) polymers containing a constituent unit identical to a constituent unit 20 of the reinforcement; For the polyamide, it is an ether block copolymer and amide (COPA) which therefore contains an amide unit such as polyamide (an example is known under the trade name PEBAX). And / or (b) polymers containing at least one olefinic constitutive unit and a reactive function, said reactive function being selectable from the following list: maleic anhydride function, glycidyl methacrylate function, acrylic acid function olefinic component may be ethylene. Optionally, it will be possible to use, in addition to a polymer according to (a) or (b), a terpolymer with polystyrene / polybutadiene-1,4 / polymethylmethacrylate blocks, such as that known by the acronym "SBM" and or a polymethyl methacrylate / polybutyl polyacrylate / methyl methacrylate terpolymer, such as that known under the acronym "MAM". This facilitates the mixing of the components (a) and / or (b) and subsequently the shaping of the material. In summary, in general, the following materials can be defined: (A) a ventral layer 20 and a backing layer 10 of elastomeric material based on ethylene alpha olefin; (B) polyamide reinforcement means 30; (C) a first component and, respectively, a third component of the thermoplastically processed film 40 defined by at least one olefin homopolymer or copolymer, which is capable, upon vulcanization, of creating a physical and / or chemical bond with the backing layer 10, respectively the ventral layer 20; (D) a second component of the thermoplastically-processed film 40 according to (a) and / or (b) above, which is capable, upon vulcanization, of creating a physical and / or chemical bond with the carrier means 30; reinforcement. Table 1 provides only one example. The polyamide (PA), which is a thermoplastic, can in particular, but not exclusively, be a PA46, PA66, or PA6. It can also be an aromatic polyamide. In the latter case, a COPA as the second component of the thermoplastically processed film 40, such as the product known under the trade name PEBAX, is particularly well suited. It should also be noted that the mechanical reinforcing means 30 may be a multi-wire cord made of a material other than polyamide (PA), in all its forms. Thus, in place of the polyamide (PA) (see (B) above), other thermoplastics such as polyester can be provided (examples = polyethylene terephthalate (PET), polyethylene naphthalate (PEN), aromatic polyester) or glass fibers. One can also provide a mixture thereof. It is also possible to consider, in place of PA, a cellulosic material. It may especially be cellulose, cotton or viscose or a mixture thereof.
    [0006] As a variant, it is also possible to envisage a mixture of a cellulosic-based material such as those mentioned above with a thermoplastic material such as those mentioned above to form this means 30 of mechanical reinforcement.
    [0007] Since the nature of the material in (B) is modified, it is necessary to look at the components defined in (D) which are capable, during vulcanization, of creating a physical and / or chemical bond with the material concerned of the medium 30. reinforcement. If the reinforcing means is polyester, a second component of the thermoplastically-processed film 40 according to (a) and / or (b) above may also be provided. In the case (a), it is an ether block copolymer and ester (COPE) which therefore contains an ester unit such as polyester (an example is known under the trade name Keyflex). In the case (b), it can especially be a co / ter polymer based on ethylene grafted with a reactive function such as maleic anhydride, glycidyl methacrylate, acrylic acid. Optionally, again for the polyester reinforcing means, it is possible to use, in addition, a terpolymer with polystyrene / polybutadiene-1,4 / polymethylmethacrylate blocks, such as that known by the acronym "SBM" and or a block terpolymer polymethyl methacrylate / butyl polyacrylate / methyl methacrylate, such as that known under the acronym "MAM". If the reinforcement means is made of glass fibers, a second component of the thermoplastically-processed film 40 according to (b) above may be provided. If the reinforcement means is based on cellulose, a second component of the thermoplastically processed film 40 according to (b) above can be provided. Furthermore, in the cases mentioned above, we have limited ourselves to the case where the ventral and dorsal layers 10 are made of an ethylene alpha olefin material, for different materials that can be envisaged for the reinforcement means and the associable components of film 40 with thermoplastic processing.
    [0008] The ventral and dorsal layers 10, with elastomeric behavior, can be made from other materials than the materials of the ethylene alpha olefin family, among which: polybutadiene (better known by the acronym BR for "Butadiene Rubber" according to the English terminology) and / or the styrene-butadiene copolymer (better known by the acronym SBR for "Styrene Butadiene Rubber" according to the English terminology); polyisoprene; natural rubber (better known by the acronym NR for "Natural Rubber" according to the English terminology); olefinic TPV (= partially or fully crosslinked elastomeric thermoplastic material); COPE (= ether block copolymer and ester); COPA (= ether block copolymer and amide).
    [0009] Thus, if the nature of the material forming the ventral and dorsal layers 10 are modified (see (A) above), it is necessary to look at the components of the thermoplastic transformation film 40 defined in (B) which are capable of during vulcanization, to create a physical and / or chemical bond with the material concerned for these layers 10, 20.
    [0010] If the backing layer 10 is made of a material with an elastomeric behavior based on BR or SBR, then the first component of the thermoplastically processable film 40 capable, during vulcanization, of creating a physical and / or chemical bond with these materials. BR or SBR can be a homopolymer or a styrenic copolymer, for example polystyrene-b-poly (ethylene-butylene) -bpolystyrene (better known by the acronym SEBS) and / or polystyrene-bpolybutadiene-b-polystyrene (better known under the acronym SBS). If the backing layer 10 is made of a material with an elastomeric behavior based on polyisoprene or natural rubber (NR), then the first component of the thermoplastically processable film 40 capable, during vulcanization, of creating a physical connection and / or chemical with these materials may be polystyrene-bpolyisoprene-b-polystyrene (better known by the acronym SIS). If the backing layer 10 is made of an elastomeric material based on an olefinic TPV, then the first component of the thermoplastically processable film 40 capable, upon vulcanization, of creating a physical and / or chemical bond with it. The material is an olefin homopolymer or copolymer, for example polyethylene (PE), especially a low density polyethylene (LDPE). If the backing layer 10 is made of a material with elastomeric behavior based on a COPE, then the first component of the thermoplastically processable film 40 capable, during vulcanization, of creating a physical and / or chemical bond with this material is also a COPE. If the backing layer 10 is made of a material with elastomeric behavior based on a COPA, then the first component of the thermoplastically processable film 40 capable, during vulcanization, of creating a physical and / or chemical bond with this material is also a COPA. All the cases described above making it possible to specify the first component of the film 40 with thermoplastic transformation depending on the nature of the material forming the base of the material with elastomeric behavior of the backing layer 10 can be transposed to the third component of the film 40 to be processed thermoplastic depending on the nature of the material forming the base of the material with elastomeric behavior of the ventral layer 20. For the various materials mentioned above to form the dorsal and ventral layers 20, it is possible to use either a reinforcement means 30 polyamide, polyester, fiberglass or cellulosic base mentioned above, with a second component of the film 40 with adequate thermoplastic processing, as described above. It should be noted that, in all the cases described above, the material with elastomeric behavior of the ventral layer 20 has a base identical to the material with elastomeric behavior of the backing layer 10. In the case of an ethylene alpha olefin base, the same basic concept means that the backing layer 10 comprises at least 30% by weight of ethylene alpha olefin and that the belly layer 20 also comprises at least 30% by weight of ethylene alpha olefin. However, the backing layer 10 may be made of a material with elastomeric behavior with a first base and the ventral layer 20 may be made of a material with elastomeric behavior with a second base, the second base being different from the first base. For this reason, the thermoplastically processable film 40 will generally comprise at least: a first component physically and / or chemically bonded with at least one component of the backing layer; a second component physically and / or chemically bonded with at least one component of the mechanical reinforcing means; and a third component physically and / or chemically bonded with at least one component of the ventral layer 20.
    [0011] The third component of the thermoplastically-processed film 40 may thus be distinct from the first component of the thermoplastically-processed film 40, in particular when the base of the material with elastomeric behavior of the ventral layer 20 is distinct from the base of the material with elastomeric behavior of the For example, the backing layer 10 may be made of a material with elastomeric behavior based on ethylene alpha olefin, the belly layer 20 made of a material with an elastomeric behavior based on BR. In this example, the first component of the thermoplastically processed film 40 can be chosen from olefin homopolymers or copolymers, for example polyethylene such as LDPE or HDPE, and the third component of the thermoplastically-processed film 40 is chosen from homoplymers. or styrenic copolymers. As for the second component of the thermoplastically processed film 40, it is chosen as a function of the material forming the mechanical reinforcing means.
    [0012] However, the third component of the thermoplastically processed film 40 may be identical to the first component of the thermoplastically-processed film 40, in particular when the base of the material with elastomeric behavior of the ventral layer 20 is identical to the base of the material with elastomeric behavior. the backing layer 10. The second component of the thermoplastic-processing film 40 is then chosen as a function of the material forming the mechanical reinforcement means 30 and in some cases this second component of the thermoplastically-processed film 40 may be identical to the first and third components of this film 40 (for example, if the dorsal 10 and ventral layers 20 are made of a material with COPE elastomeric behavior and the mechanical reinforcement means 30 is made of polyester).
    [0013] That the base of the material with elastomeric behavior of the ventral layer 20 is different or identical to the base of the material with elastomeric behavior of the backing layer 10 does not preclude the presence of other components, in particular components made of a material with elastomeric behavior. By way of example, provision could be made for a backing layer 10 whose base is BR and a ventral layer 20 with the same base BR also comprising another material with elastomeric behavior such as ethylene alpha olefin, SBR, NR, COPE, COPA , polyisoprene or olefinic TPV.
    [0014] The multi-strand cordset can be replaced by a woven, a nonwoven or a knit, insofar as what matters to ensure cohesion between the different elements of the belt is the chemical compatibility between this reinforcement means and the film. 40 to thermoplastic transformation. On the other hand, the ribbed shape of the ventral layer 20 is not a limiting factor. It can therefore be a rib trapezoidal, striated or other. Moreover, a ribbed form is not obligatory. The ventral layer 20 may indeed have a notched shape, which allows to define a synchronous belt. Whatever the materials described above, which are compatible to manufacture a belt according to the invention, the nature of the components included in the thermoplastically processed film 40 makes it possible to replace the RFL. However, it is not excluded that such a film 40 is implemented in combination with the RFL provided in the mechanical reinforcement means 30, even if it is ultimately better to be completely free of the presence of RFL. FIG. 3 (diagram), 4 (real), 5 (real) and 6 (diagram) show the structure of a blank of the belt of FIG. 2, before vulcanization. In these figures, the backing layer 10 is recognized, the ventral layer 20 (not yet ribbed, this operation being carried out subsequently by a molding step, for example by a mold, during the manufacturing process and before the vulcanization) and medium 30 mechanical reinforcement. In Figures 4 and 5, one can also observe the various son of the mechanical reinforcement means 30, which is a multi-wire cable.
    [0015] In practice, the thermoplastically processed film 40 is obtained after the assembled assembly (stack) of FIG. 3 is subjected to a pressure at an elevated temperature, leading to a thinning of the thermoplastically processed films 40 ', 40 ". The thinning of the films 40 ', 40 "will advantageously take place during the vulcanization process. More precisely, before vulcanization, the film 40' is hot-lined with the backing layer 10. and the film 40 "with the ventral portion 20. The film 40 'is therefore the one which comprises a component capable, during vulcanization, of creating a physical and / or chemical bond with at least one component of the backing layer 10 and a another component capable, during this vulcanization, of creating a physical and / or chemical bond with a component of the mechanical reinforcement means 30. The film 40 "is that which comprises a component capable of during vulcanization, to create a physical and / or chemical bond with at least one component of the ventral layer 20 and another component capable, during vulcanization, of creating a physical and / or chemical bond with a component of the medium mechanical reinforcement. The two films 40 ', 40 "are presented assembled and held with the dorsal and ventral layers at the making stage.
    [0016] The making step consists in depositing the assembly (10/40 ') in a first step, then in depositing the reinforcement means 30 and finally, in removing the assembly (20/40 "). that the proposed stack makes it possible to ensure a tack panty ("tack" according to the Anglo-Saxon terminology) which is sufficient to ensure different manipulations before the vulcanization, because, in order to prevent the reinforcement means from being, before vulcanization, poorly positioned with respect to the dorsal and ventral layers 20, it is important to maintain the solidarity of the garment made In the state of the art, several approaches have already been proposed for this purpose. A major drawback of this approach is that it limits in practice the nature of the materials which can be envisaged to form the backing layers, and it is necessary to use perchlorethylene on the belt making towers. ntral, because these layers must then have a specific composition to interact with perchlorethylene. This is not the case in the context of the invention. Indeed, the nature of the first and second components of the films 40 ', 40 "makes it possible to obtain a sufficient" tack "because these components are adapted to the nature of the materials forming the dorsal and ventral layers on the one hand, and, on the other hand, the mechanical reinforcement means 30. For example, if the back and ventral layers 20 are made of EPDM and the mechanical reinforcement means 30 PA, the first component of the films 40 ', 40 "can be LDPE (adapted to EPDM and more generally to ethylene alpha olefin) and the second component a PEBAX, adapted to PA. Moreover, another approach of the state of the art of making a sheath around the cable coated with RFL takes advantage of the use of materials adapted to ensure the "tack". For example, if the dorsal and ventral layers 2 are made of ethylene alpha olefin, the sheath of the reinforcing means 3 may be an ethylene alpha olefin elastomer. In practice, the cladding means 3 is thus sheathed by extrusion. This makes it possible to mechanically clamp the sheath against the reinforcing means 3. Between the sheath 20 and the dorsal 1 and ventral layers 2, a sufficient "tack" is then obtained, because of the compatibility of the materials, all made on the basis of ethylene alpha olefin, which may be EPDM or EPM. The cladding approach makes it possible to use different elastomeric materials for the dorsal and ventral layers 2. It suffices for this to have a sheath made of an elastomeric material identical to that forming said layers 1, 2. purpose of improving the "tack", the invention proposes an original solution. Indeed, it is possible to further improve the "tack", in particular at the interface between the films 40 ', 40 "and the mechanical reinforcement means 30, in particular when the latter is formed of a Wired multi-wire or multi-filament (which is usually the case), using a self-gripping.Using the perchlorethylene solution, the use of a self-gripping is much more interesting in environmental terms and not is not limited to certain compositions of the dorsal and ventral layers 20. Moreover, compared to the so-called "sheathing" solution, it does not require the implementation of an additional step in the manufacturing process. the films 40 ', 40 "then comprise self-gripping means 401', 401" advantageously oriented in the direction of the mechanical reinforcing means 30, for example perpendicular to a base 402 ', 402 "of the film 40', 40 "These means have The hooks 401 ', 401 "may have various shapes, their function being to grip the films 40', 40" with the reinforcing means 30, especially when the latter is made of threads or filaments. For example, it may be hooks, harpoons, pins and more generally excrescences advantageously oriented toward the mechanical reinforcement means 30. These self-gripping means 401 ', 401 "are generally arranged at regular intervals both in the longitudinal plane (plane of Figure 4) and the transverse plane (plane of Figure 5) at this stage of the manufacturing process. the films 40 ', 40 "are generally on a flat surface. The purpose of these self-gripping means 401 ', 401 "is to ensure mechanical fastening of the threads of the reinforcement means 30 to the films 40', 40". This improves the tackiness ("tack"). In addition, the presence of self-gripping means 401 ', 401 "also improves the initial positioning of the wires of the mechanical reinforcing means with respect to the films 40', 40". This is particularly interesting because, incidentally, this may make it possible to dispense with a toluene and isocyanate-based treatment generally used for a mechanical reinforcement means treated with RFL. Such a treatment based on toluene and isocyanate makes it possible, in the prior art, to penetrate the core of the fibers of the reinforcement means to ensure cohesion between these fibers. For this purpose, the height H of the self-gripping means, the longitudinal pitch PL and the transverse pitch PT between two self-gripping means are adjusted according to the geometry and the nature of the reinforcement means (diameter, twisting, dimensions of a filament, chemical nature) to guarantee the pitch P of the reinforcement means 30 (FIG. 5). The height H is chosen to avoid buckling. The transverse pitch PT between two self-gripping means makes it possible to manage the lateral support of the reinforcement means. The longitudinal pitch PL between two self-gripping means makes it possible to manage the maintenance of the reinforcement means in the longitudinal direction. Depending on the geometry and the nature of the filament, the intervals PL, PT between each self-gripping means may be different according to each of the planes (this is the case in the diagram of Figure 6). The presence of self-gripping means 401 ', 401 "is also particularly advantageous for limiting or even eliminating the application of an isocyanate treatment which aims, in the state of the art, to stiffen the son of the means 30 of mechanical reinforcement to avoid possible fraying problems With the self-gripping means, this problem is less present In the end, and as explained above, it is the temperature reached during the vulcanization which makes it possible to thin the films 40 ', 40 "so that these flow around the cord 30. During vulcanization, the films 40 ', 40" disappear so as to form a single film of continuous shape 40, as shown in Figure 2. In addition the adapted chemical composition of the films 40 'and 40 "for the intended application, the method according to the invention therefore implements a use of the films 40', 40" aimed at transforming them into a single film of continuous shape. this was specified prec However, the vulcanization advantageously involves co-crosslinking of the thermoplastic-forming film 40 in formation with the dorsal and ventral layers 20. For the production of the belt shown in FIG. 2, the vulcanization was carried out at the temperature T = 183 ° C. More generally, a vulcanization temperature of between 150 ° C. and 210 ° C. is conceivable. To summarize, the manufacturing method therefore comprises the following steps: a)), in the green state, to arrange a stack comprising: - a so-called dorsal layer 10 - a first thermoplastically processed film 40 ', doubling the layer 35 dorsal 10, and having a component capable, during step b "), to create a physical and / or chemical bond with at least one component of the backing layer 10 and another component capable, during step b"), to create a physical and / or chemical bond with at least one component of a mechanical reinforcing means 30, for example made of thermoplastic material - the mechanical reinforcing means 30 - a so-called ventral layer 20 - a second film 40 " with thermoplastic transformation, doubling the ventral layer 20, and comprising a component capable of creating a physical and / or chemical bond with at least one component of the ventral layer 20 and another component capable of creating a physical and / or chemical bond withat least one component of the mechanical reinforcing means; this stack forming a belt blank; b ") molding and vulcanizing the belt blank, this step involving the formation of a thermoplastically processed film 40 surrounding the mechanical reinforcing means from the fluidification of said first and second films 40 ', 40" to provide the physical and / or chemical connection between said thermoplastic transformation film 40 on the one hand and the backing layer 10, the ventral layer 20 and the mechanical reinforcement means 30 on the other hand. This method according to the invention can be implemented for each set of materials capable of creating a physical and / or chemical bond described above. Figure 7 shows, in a sectional view, the belt blank of Figure 3, on which it is specified the various components capable of forming the blank. Thus, the backing layer 10 is made of a material with an elastomeric behavior based on a material X. The ventral layer 20 is made of a material with elastomeric behavior based on a material Y, Y which may be identical or different from X. The film 40 'comprises a component C1 capable of bonding physically and / or chemically to the backing layer 10, advantageously with the base X. The film 40 "comprises a component C'l capable of bonding physically and / or chemically to the ventral layer 20, advantageously with the base Y; C '1 may be identical or not to Cl as explained above.Each of the two films 40', 40 "also comprises a component C2 capable of binding physically and / or chemically by means of reinforcement. FIG. 8 shows, in a sectional view, a representative diagram of a belt blank similar to that of FIG. 3, but further comprising an outer textile layer 60 covering the ventral layer 20, via a complementary film.
    [0017] The complementary film 50 allows the cohesion with the textile layer 60 and the ventral layer 20. As has been specified above, the ventral layer 20 is made of a material with elastomeric behavior which can be based on ethylene alpha olefin, BR , SBR, polyisoprene, NR, olefinic TPV, COPE or COPA. The textile layer 60 may be woven or non-woven. The textile layer 60 may be made of a thermoplastic material. Among the thermoplastic materials that can be envisaged to form this textile layer 60, any of the materials listed above for the mechanical reinforcing means, namely polyamide (PA46, PA66, PA6, aromatic polyamide), polyester ( PET, PEN, aromatic polyester), glass fibers or a mixture thereof. It is still possible to provide a cellulosic-based material (cellulose, cotton, viscose or a mixture thereof). It is also possible to provide two-component materials formed of a core made of a first material, for example a thermoplastic material, coated with a sheath made of another material, for example a thermoplastic material. Thus, it is possible to envisage, by way of examples, the following core / sheath pairs: PET / PE, PA / PE, glass fibers / PE, cellulose-based material / PE. The complementary film 50 is advantageously produced according to one or the other of the films 40 ', 40 "with respect to the structure With regard to this structure, the complementary film 50 can thus be provided with or without self-gripping means. Advantageously, self-gripping means will however be provided on the complementary film In all cases, especially when self-gripping means are provided, the complementary film 50 is arranged in the stack shown in FIG. the film 40 'shown in Figure 4, in order to be in contact with the textile layer 60. Thus, before vulcanization, maintaining the position of the textile layer 60 relative to the complementary film 50 is ensured.
    [0018] The complementary film 50 is also advantageously produced in accordance with one or the other of the films 40 ', 40 "with regard to the materials that can be envisaged Thus, the complementary film 50 is a thermoplastic transformation film comprising: a first component capable, during vulcanization, of creating a physical and / or chemical bond with at least one component of the ventral layer 20, and - a second component capable, upon vulcanization, of creating a physical and / or chemical bond with at least one component of the textile layer 60. The connection between the complementary film 50 and the ventral layer 20 may involve a chemical bond by co-crosslinking, in particular by the peroxidic ingredients of the ventral layer 20.
    [0019] The first component of the complementary film 50 may be an olefin homopolymer or copolymer (LDPE, for example), a styrenic homo or copolymer (SEBS or SBS, for example), an SIS, a COPE or a COPA depending on the material on which the ventral layer 20 is based and, as previously described for the film 40.
    [0020] The second component of the complementary film 50 may be selected according to (a) and / or (b) depending on the material forming the textile layer 60, as previously described. By this means, it is ensured, during and after vulcanization, a cohesion between the ventral layer 20, the complementary film 50 and the textile layer 60, giving this belt a service life meeting the requirements. This cohesion is achieved without the presence of RFL. 30
    权利要求:
    Claims (25)
    [0001]
    REVENDICATIONS1. A power transmission belt comprising: - a backing layer (10) made of an elastomeric material; - a ventral layer (20) made of a material with elastomeric behavior; means (30) for mechanical reinforcement, for example made of thermoplastic material, interposed between the backing layer (10) and the ventral layer (20); characterized in that it comprises a thermoplastic transformation film (40) surrounding the mechanical reinforcing means (30), said film (40) comprising at least: a first component physically and / or chemically bonded with at least one component the backing layer (10); a second component physically and / or chemically bonded with at least one component of the mechanical reinforcing means (30); and a third component physically and / or chemically bonded with at least one component of the ventral layer (20). 20
    [0002]
    2. Belt according to claim 1, characterized in that the backing layer (10) is made of a material with elastomeric behavior based on ethylene alpha olefin or based on an olefinic TPV and that the first component of the film The thermoplastic transformation (40) is selected from olefin homopolymers or copolymers, for example polyethylene such as LDPE or HDPE.
    [0003]
    3. Belt according to claim 1, characterized in that the backing layer (10) is made of a material having an elastomeric behavior based on polybutadiene (BR) or on the basis of styrene-butadiene copolymer (SBR) and that the first component of the thermoplastically processable film (40) is selected from homopolymers or styrene copolymers, for example polystyrene-b-poly (ethylene-butylene) -bpolystyrene (SEBS) and / or polystyrene-b-polybutadiene-b-polystyrene (SBS).
    [0004]
    4. Belt according to claim 1, characterized in that the backing layer (10) is made of a material with an elastomeric behavior based on polyisoprene or based on natural rubber (NR) and in that the first component of the film (40) ) thermoplastic transformation is polystyrene-b-polyisoprene-b-polystyrene (SIS).
    [0005]
    5. Belt according to claim 1, characterized in that the backing layer (10) is made of a material with an elastomeric behavior based on an ether block and ester block copolymer (COPE) and in that the first component of the film ( 40) thermoplastic transformation is also an ether block copolymer and ester (COPE).
    [0006]
    Belt according to claim 1, characterized in that the backing layer (10) is made of an elastomeric material based on an ether block copolymer (COPA) and that the first component of the film ( 40) thermoplastic transformation is also an ether block copolymer and amide (COPA).
    [0007]
    7. Belt according to one of the preceding claims, characterized in that the means (30) of mechanical reinforcement is made of a material selected from a polyamide, a polyester, glass fibers or a cellulosic-based material and in that the second component of the thermoplastically processable film (40) comprises a material selected from a polymer containing at least one olefinic constituent unit and a reactive functional group selected from a maleic anhydride function, a glycidyl methacrylate function, an acrylic acid function.
    [0008]
    8. Belt according to the preceding claim, characterized in that the olefinic constituent unit of said polymer containing at least one olefinic constituent unit and a reactive functional group selected from a maleic anhydride function, a glycidyl methacrylate function, an acrylic acid function is ethylene .
    [0009]
    9. Belt according to one of the preceding claims, characterized in that the means (30) for mechanical reinforcement is made of polyamide and in that the second component of the thermoplastically processed film (40) comprises an ether block copolymer and amide (COPA).
    [0010]
    10. Belt according to one of claims 1 to 8, characterized in that the means (30) of mechanical reinforcement is made of polyester and in that the second component of the film (40) to thermoplastic transformation comprises a block copolymer ether and ester (COPE).
    [0011]
    11. Belt according to one of the preceding claims, characterized in that the ventral layer (20) is made of a material with elastomeric behavior based on ethylene alpha olefin or based on an olefinic TPV 10 and that the third component of the thermoplastically processed film (40) is selected from olefin homopolymers or copolymers, for example polyethylene such as LDPE or HDPE.
    [0012]
    12. Belt according to one of claims 1 to 10, characterized in that the ventral layer (20) is made of a material with elastomeric behavior based on polybutadiene (BR) or based on styrene-butadiene copolymer (SBR). and in that the third component of the thermoplastically processable film (40) is selected from styrenic homopolymers or copolymers, for example polystyrene-b-poly (ethylene-butylene) -b-polystyrene (SEBS) and / or polystyrene -b-polybutadiene-bpolystyrene (SBS).
    [0013]
    13. Belt according to one of claims 1 to 10, characterized in that the ventral layer (20) is made of an elastomeric material based on polyisoprene or based on natural rubber (NR) and that the third component of the thermoplastically processed film (40) is polystyrene-b-polyisoprene-b-polystyrene (SIS).
    [0014]
    14. Belt according to one of claims 1 to 10, characterized in that the ventral layer (20) is made of a material with elastomeric behavior based on an ether block copolymer and ester (COPE) and in that the third component of the thermoplastically processed film (40) is also an ether block copolymer (COPE). 35
    [0015]
    15. Belt according to one of claims 1 to 10, characterized in that the ventral layer (20) is made of a material with an elastomeric behavior based on an ether block copolymer and amide (COPA) and in that the third The thermoplastically processable film component (40) is also an ether block copolymer (COPA).
    [0016]
    16. Belt according to claim 1, characterized in that the back layer (10) and the ventral layer (20) are made of a material with elastomeric behavior on an identical basis.
    [0017]
    17. Belt according to the preceding claim, characterized in that: - the back layer (10) and the ventral layer (20) are made of a material with elastomeric behavior based on ethylene alpha olefin; - The means (30) of mechanical reinforcement is made of polyamide; the thermoplastically processed film (40) comprises: a first component consisting of an olefin homopolymer or copolymer; a second component consisting of an ether block and amide copolymer (COPA) and / or a polymer; containing at least one olefinic constituent unit and a reactive functional group selected from a maleic anhydride function, a glycidyl methacrylate function, an acrylic acid function; a third component formed of an olefin homopolymer or copolymer.
    [0018]
    18. Belt according to the preceding claim, characterized in that the polyamide is selected from: PA66, PA46, PA6, aromatic polyamide.
    [0019]
    19. Belt according to one of the preceding claims, characterized in that the means (30) of mechanical reinforcement is a multi-son cabled, a woven, a nonwoven or a knit.
    [0020]
    20. Belt according to one of the preceding claims, characterized in that the connection between the thermoplastically processed film (40) and at least one of the backing layer (10) or the belly layer (20) involves a connection. chemical by co-crosslinking.
    [0021]
    21. Belt according to one of the preceding claims, characterized in that it comprises, in addition: - a complementary film (50) with thermoplastic transformation, covering the ventral layer (20) and, a textile layer (60) covering the complementary film (50), the complementary film (50) comprising: a first component physically and / or chemically bonded with at least one component of the ventral layer (20); a second component physically and / or chemically bonded with at least one component of the textile layer (60).
    [0022]
    22. Belt according to the preceding claim, characterized in that the connection between the complementary film (50) and the ventral layer (20) involves a chemical bond by co-crosslinking.
    [0023]
    23. A method of manufacturing a power transmission belt, characterized in that it comprises the following steps: a ") to arrange, in the green state, a stack comprising: a so-called dorsal layer (10); a first film (40 ') with a thermoplastic transformation, doubling the backing layer (10), and comprising a component capable, during step b "), of creating a physical and / or chemical bond with at least one component of the dorsal layer (10) and another component capable, during step b "), of creating a physical and / or chemical bond with at least one component of a means (30) of mechanical reinforcement, for example of thermoplastic material - the means (30) of mechanical reinforcement - a so-called ventral layer (20) - a second film (40 ") with thermoplastic transformation, doubling the ventral layer (20), and comprising a component capable of creating a connection physical and / or chemical with at least one component of the ventral layer (20) and another e component capable of creating a physical and / or chemical bond with at least one component of the mechanical reinforcing means (30); This stack forming a belt blank; b ") molding and vulcanizing the belt blank, this step involving the formation of a thermoplastic transformation film (40) surrounding the mechanical reinforcing means (30) from the fluidification of said first and second films (40 ', 40 ") to ensure the physical and / or chemical bonding between said thermoplastically processed film (40) on the one hand and the couchedorsal (10), the ventral layer (20) and the mechanical reinforcement means (30) on the other hand. 'somewhere else.
    [0024]
    24. Method according to the preceding claim, characterized in that at least one of the two films (40 ', 40 ") to thermoplastic transformation has self-gripping means (401', 401") to improve the mechanical attachment of the means (30) of mechanical reinforcement, in particular when this means (30) of mechanical reinforcement is a multi-wire cord.
    [0025]
    25. Method according to one of claims 23 or 24, characterized in that the two films (40 ', 40 ") with thermoplastic processing have self-gripping means (401', 401") oriented towards the means (30). ) mechanical reinforcement.15
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    同族专利:
    公开号 | 公开日
    WO2015151010A1|2015-10-08|
    US10267380B2|2019-04-23|
    EP3146236A1|2017-03-29|
    US20170023099A1|2017-01-26|
    FR3019609B1|2016-05-13|
    EP3146236B1|2021-11-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3919892A|1974-08-12|1975-11-18|Dayco Corp|Endless power transmission belt structure|
    US4752282A|1983-01-06|1988-06-21|Habasit Ag|Flat drive belt|
    GB2292339A|1994-08-16|1996-02-21|Hoechst Ag|A fibre-reinforced laminate suitable for the manufacture of light conveyor belts and flat drive belts|
    EP0838605A1|1996-10-23|1998-04-29|Sampla Belting S.p.A.|Flat belt and process for the manufacture of same|
    CN201258943Y|2008-08-06|2009-06-17|江阴天祥塑化制带有限公司|High strength drive flat belt capable for replacing polyamide sheet base belt|
    WO2010066505A1|2008-12-10|2010-06-17|Contitech Antriebssysteme Gmbh|Elastic articles, particularly drive belts, having a textile overlay and a bonding agent made from meltable plastic|
    US5971879A|1997-04-22|1999-10-26|The Gates Corporation|Belt reinforcing material and belt constructed therewith|
    WO2001086058A1|2000-05-08|2001-11-15|N.V. Bekaert S.A.|Zinc-coated steel cord with improved fatigue resistance|
    US6443866B1|2000-08-14|2002-09-03|The Goodyear Tire & Rubber Company|Power transmission belt|
    US8932165B2|2006-03-31|2015-01-13|The Gates Corporation|Toothed power transmission belt|
    DE102006025562A1|2006-06-01|2007-12-06|Arntz Beteiligungs Gmbh & Co. Kg|Transmission belt of rubber-elastic material, e.g. a power belt, V-belt or flat belt, contains an embedded tension-bearing layer comprising layers of plastic film with high tensile strength and low extensibility|
    US7824284B2|2007-11-29|2010-11-02|The Gates Corporation|Power transmission belt and cord adhesive system and adhesion method|
    EP2452901B1|2009-07-07|2019-03-27|Mitsubishi Heavy Industries Machinery Systems, Ltd.|Heat-resistant laminated conveyor belt|
    BR112012029993B1|2010-06-11|2019-01-02|Saint Gobain Performance Plastics Corp|belt and grid system; and method for forming grid belt|
    FR2980203B1|2011-09-20|2014-12-26|Rhodia Operations|THERMOPLASTIC COPOLYIMIDES|
    DE102011121656A1|2011-12-20|2013-06-20|Arntz Beteiligungs Gmbh & Co. Kg|Belt with multilayer impregnated textile cover|
    CN104428561B|2012-07-03|2017-03-08|阪东化学株式会社|Transmission belt and its manufacture method and belt driver|
    CA2880573C|2012-08-15|2017-05-02|Gates Corporation|Power transmission belt|
    JP6184102B2|2013-01-16|2017-08-23|株式会社Ｓｃｒｅｅｎセミコンダクターソリューションズ|Alignment apparatus and substrate processing apparatus|
    US9829066B2|2014-04-07|2017-11-28|Gates Corporation|Electrically conductive power transmission belt|
    WO2016200507A1|2015-06-11|2016-12-15|Bridgestone Americas Tire Operations, Llc|Belt assemblies coated with a magnetic rubber composition and tires including the same|
    CN108025890B|2015-09-14|2021-07-09|奥的斯电梯公司|Woven elevator belt with multifunctional coating|
    WO2017061100A1|2015-10-09|2017-04-13|バンドー化学株式会社|V-ribbed belt and method for manufacturing same|
    JP6349369B2|2015-10-29|2018-06-27|三ツ星ベルト株式会社|Manufacturing method of core wire for transmission belt, treatment agent, and treatment kit|FR3051473A1|2016-05-20|2017-11-24|Michelin & Cie|COMPOSITE AND POWER TRANSMISSION BELT|
    FR3051474B1|2016-05-20|2018-05-18|Compagnie Generale Des Etablissements Michelin|COMPOSITE AND POWER TRANSMISSION BELT|
    FR3071839A1|2017-09-29|2019-04-05|Compagnie Generale Des Etablissements Michelin|COMPOSITE AND POWER TRANSMISSION BELT|
    FR3071838A1|2017-09-29|2019-04-05|Compagnie Generale Des Etablissements Michelin|COMPOSITE AND POWER TRANSMISSION BELT|
    法律状态:
    2015-04-27| PLFP| Fee payment|Year of fee payment: 2 |
    2016-04-28| PLFP| Fee payment|Year of fee payment: 3 |
    2017-03-28| PLFP| Fee payment|Year of fee payment: 4 |
    2018-03-22| PLFP| Fee payment|Year of fee payment: 5 |
    2019-03-26| PLFP| Fee payment|Year of fee payment: 6 |
    2020-03-20| PLFP| Fee payment|Year of fee payment: 7 |
    2021-03-24| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1452959A|FR3019609B1|2014-04-03|2014-04-03|POWER TRANSMISSION BELT.|FR1452959A| FR3019609B1|2014-04-03|2014-04-03|POWER TRANSMISSION BELT.|
    PCT/IB2015/052327| WO2015151010A1|2014-04-03|2015-03-30|Power transmission belt|
    EP15718623.0A| EP3146236B1|2014-04-03|2015-03-30|Power transmission belt|
    US15/301,017| US10267380B2|2014-04-03|2015-03-30|Power transmission belt|
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