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    • 专利摘要:
    An extrusion molded product having retaining portions having a contact portion comprising from 30 to 60 parts by weight of a component: a block copolymer comprising at least two polymer A-blocks comprising a vinyl aromatic compound and a polymer B-block comprising a conjugated diene compound, from 10 to 30 parts by weight of a component (b): a crystalline ethylene or propylene homopolymer and from 25 to 55 parts by weight of a component (c): a rubber plasticizer ; and in addition to (a) + (b) + (c) = 100 parts by weight, from 3 to 15 parts by weight of a component (d): a petroleum resin and / or a hydrogenated petroleum resin.
    公开号:FR3047195A1
    申请号:FR1670298
    申请日:2016-06-09
    公开日:2017-08-04
    发明作者:Takashi Hirokawa；Katsuhisa Kato
    申请人:Tokiwa Chemical Industries Co Ltd；System Technical Co Ltd；
    IPC主号:
    专利说明:

    EXTRUSION-MOLDED PRODUCT HAVING A CORE MATERIAL BACKGROUND OF THE INVENTION Field of the Invention [0001]
    The present invention relates to an extrusion molded product having a core material, such as a gasket and a hubcap, to be mounted on a wing around the periphery of an opening of an automobile body, such as a door, a trunk and a rear door.
    Description of the Related Art [0002]
    In an extrusion-molded product having a core material to be mounted on a wing around the periphery of an opening of an automobile body, such as a door, a trunk and a rear door, a body (I) molded product comprises a generally U-shaped cross section clamping portion (2) of a core material (3) and a thermoplastic elastomer composition coating member (4) by a method of extrusion; the clamping portion (2) has holding portions (5) formed within its lateral portions (7) so that the retaining portions (5) project from the covering member (4). ; as shown in FIG. 9, the body (1) of the extrusion-molded product is mounted on a flange (II) while being retained while the flange (11) and the retaining portion (5) abut one against the other. But the small coefficient of static friction of the surface of the portion (5) retaining is likely to cause slippage, and there is the problem that the body (1) of the molded product falls easily from the wing (11). To solve the problem mentioned above, there is provided an extrusion-molded product, wherein the retaining portion (5) has a contact portion (6) of a non-slip thermoplastic elastomer composition on an abutting portion. on the wing (11) (for example, document 1 as listed below).
    Document of the Prior Art [0003]
    Document 1: Japanese Patent Application Publication No. 2011-25906 SUMMARY OF THE INVENTION Problem to be Solved by the Invention [0004]
    However, the conventional technique described in document 1 mentioned above has a problem in that, in severe environments, polyethylene contained mainly in the contact layer (6) or a copolymer comprising mainly polyethylene, becomes incapable of retaining oil having to retain more oil than it can and the oil moves and attaches to the surface of the layer (6) of contact thereby decreasing the sealing performance between the part (6) ) and the wing (11) as time passes.
    [0005]
    In addition, for mounting the body (1) of molded product on the part of the periphery of an opening of an automobile body, so that the body (I) of the molded product is bent by the part of wedge, the coating member (4) and the retaining portions (5) are preferably of a soft thermoplastic elastomer having a type A durometer hardness of from 45 to 65. But, as the use of the thermoplastic elastomer As the flexibility of the oil mixture increases, the problem arises that more and more oil of the thermoplastic elastomer within the coating member (4) moves towards the layer (6). ) and that the oil is attached to the surface of the contact portion (6).
    [0006]
    The present invention has been made in order to solve the aforementioned problems and the present invention is directed to an extrusion molded product having a core material, at least one of the holding portions (5) having a portion (6) of contact in one piece with the holding portion (5) on a portion abutting on a flange (11), the static coefficient of friction of the contact portion (6) being greater than that of the portion (5). ) and the thermoplastic elastomer composition forming the contact portion (6) mainly comprises a component (a) consisting of a rubber having a high ability to contain oil, thereby preventing oil from moving. attaching to the surface of the contact portion (6) to prevent slippage of the surface of the contact portion (6) and allowing mounting of the molded product body (1) without running the danger that the body of the molded product will fall from the wing (II), on the corner portion of the periphery of an opening of an automobile body such that the body (1) of the molded product is bent by the corner portion.
    [0007]
    In order to solve the above-mentioned problems, an extrusion-molded product having a core material is characterized in that the thermoplastic elastomer composition forming the contact portion (6) comprises: from 30 to 60 parts by weight of a constituent (a): a block copolymer comprising at least two polymer A sequences mainly comprising a vinyl aromatic compound and at least one polymer B block mainly comprising a conjugated diene compound and / or a hydrogenated block copolymer obtained by hydrogenation of the copolymer sequenced; from 10 to 30 parts by weight of a component B: a crystalline ethylene or propylene homopolymer or a crystalline copolymer comprising mainly ethylene or propylene; and from 25 to 55 parts by weight of a component (c): a rubber plasticizer; and in addition to (a) + (b) + (c) = 100 parts by weight mentioned above: from 3 to 15 parts by weight of a component (d): a petroleum resin and / or a resin of hydrogenated oil obtained by hydrogenation.
    [0008]
    It is preferred that the thermoplastic elastomer forming the coating member (4) and the retaining portion (5) have a type A durometer hardness of from 45 to 65.
    [0009]
    As an extrusion molded product having a core material according to the present invention is constructed so that at least one of the holding portions (5) has an integral contact portion (6) with the portion (5) of restraint on a portion abutting on a wing (11), the coefficient of static friction of the portion (6) of contact being larger than that of the portion (5) retaining, there is an effect advantageous in that the extrusion-molded product does not slide easily along the wing (11) and does not come off.
    In particular, the thermoplastic elastomer composition forming the contact portion (6) mainly comprises a component (a) consisting of a rubber having a large capacity to contain oil and, thus, there is the advantageous effect that even in severe environments, oil is prevented from moving and attaching to the surface of the contact part (6), which makes it possible to maintain the sealability of the part ( 6) contact.
    Furthermore, even if a flexible thermoplastic elastomer having a type A durometer hardness of 45 to 65 is used for the coating element (4) and for the retention portion (5) which can be mounted on the corner of the periphery of an opening of an automobile body so as to be bent by the corner portion, there is also the advantageous effect of preventing it from moving and attaching to the surface of the contact portion (6), which makes it possible to maintain the sealing ability of the contact portion (6).
    As mentioned above, the contact portion (6) is formed in one piece by coextrusion with the retaining portion (5), which provides the advantageous effect that the molded product body (1) not fall from the wing (11) ·
    Preferably, the contact portion (6) is formed in the manner of a layer on the surface of the tip side of the retaining portion (5).
    Preferably, the contact portion (6) is formed over the entire surface of the distal end portion of the retaining portion (5) or over the entire surface of the retaining portion (5).
    Preferably, the contact portion (6) is formed on the retaining portion (5) only on one of the lateral portions (7).
    Preferably, the contact portion 6 is formed on the retaining portions (5) on the two lateral portions (7).
    Preferably, the thermoplastic elastomer forming the coating member (4) and the retaining portion (5) have a type A durometer hardness of 45 to 65.
    Preferably, a hollow seal portion (9) is formed on an outer periphery of the clamping portion (2).
    Preferably, the generally U-shaped core material (3) is made of a synthetic resin or a metal.
    BRIEF DESCRIPTION OF THE DRAWINGS
    [0010]
    Fig. 1 is a sectional view of the molded product body according to one embodiment of the present invention.
    Fig. 2 is a sectional view, in which the molded product body according to the embodiment according to the present invention is mounted on a wing.
    Fig. 3 is a sectional view of the molded product body according to another embodiment of the present invention, wherein a hollow sealing portion is provided outside a connecting portion and a contact portion is formed on each of the retaining portions facing each other on both sides.
    Fig. 4 is a sectional view of the molded product body according to another embodiment of the present invention, wherein a hollow sealing portion is provided outside a side portion.
    Fig. 5 is a sectional view of another embodiment according to the present invention, wherein a contact portion is formed at a lower position on a first long holding portion and a second short vertical holding portion.
    Fig. 6 is a schematic view showing a series of operations for manufacturing an extrusion molded product according to another embodiment of the present invention, a core material for forming a portion of a molded product body being made of a hard synthetic resin.
    Fig. 7 is a sectional view of a molded product body, in which a passage channel of a pane is integrally formed with the lower portion of a clamping portion.
    Fig. 8 is a partial perspective view of a core material according to another embodiment of the present invention, with gap portions being cut and formed in the core material.
    Fig. 9 is a sectional view of a conventional molded product body having no contact portion formed therein.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
    [0011]
    Preferred embodiments of an extrusion molded product according to the present invention will be described hereinafter with reference to the accompanying drawings. The embodiments described below are only examples of the present invention and thus the present invention, which is in no way limited to these embodiments, can be realized in all types of variants encompassed by the present invention. technical idea of the present invention.
    [0012]
    Descriptions will be made of the drawings showing the embodiments of the present invention and Figure 1 is a sectional view of an extrusion molded product having a core material to be mounted on a wing around the periphery of the opening. an automobile body, such as a door, a trunk, a rear door. A molded product body (1) is formed by extruding core material (3), synthetic resin or metal, and a thermoplastic elastomer coating element (4) into a clamping part (2). of generally U-shaped cross-section. In this regard, the coating element (4) is formed on a part of the surface or the entire periphery surface of the core material (3).
    Inside the side portions (7) of the clamping portion (2) are formed retaining portions (5), each protruding from the covering member (4). One of the parts (5) for retaining a contact portion (6), formed in the manner of a layer by extrusion, on the surface of its tip side which abuts the flange (11). The contact portion (6), which has a greater coefficient of static friction than that of the holding portion (5), is a thermoplastic elastomer composition comprising mainly a component (a) which has a large holding force even in severe environments.
    [0014]
    Figure (2) shows a state of the molded product body (1) of Figure 1, while it is mounted on a wing around the periphery of an opening of an automobile body.
    [0015]
    As shown in FIG. 2, when the body (1) of the molded product is mounted on a wing around the periphery of an opening of an automobile body, the parts (5) of restraint which are seen right and left sides in Figure 2 are bent respectively, the portion (5) of short retention of the left side in Figure (2) being abutted elastically at its distal end on the flange (11) around the periphery of an opening of an automobile body, while the portion (5) long retaining, which is seen on the right side in Figure 2, abuts elastically to the portion (6) of contact provided at its end distal on the wing (11) around the periphery of an opening of an automobile body.
    [0016]
    FIG. 3 shows a clamping portion (2) formed by coating a lining member (4) with all the inner and outer peripheries of the core material (3), a hollow sealing portion (9) being formed at outside a connecting part (8) of the clamping part (2); holding portions (5) are formed inside lateral parts (7) so that each projects from the lateral parts (7); and contact portions (6) are formed on the retaining portions (5) facing each other on both sides in portions intended to abut a wing (11).
    [0017]
    In other words, in the body (1) of the molded product according to the embodiment shown in FIG. 3, a clamping portion (2) is formed by coating all the inner and outer peripheries of the core material (3). a coating member (4), a hollow seal portion (9) being formed outside a connecting portion (8) of the clamping portion (2); retaining portions (5) are formed within lateral portions (7) so that two retaining portions (5), (5) project from each of the lateral portions (7), (7) and a contact portion (6) is formed on each of the retaining portions facing each other on both sides at a portion intended to abut a flange (11).
    [0018]
    In addition, the body (1) of the molded product according to an embodiment shown in FIG. 3 has an additional arrangement for covering the outside of the lateral portions (7), (7) with layers (16), (16) ) Epidermal synthetic resin. The epidermal synthetic resin layers (16), (16) are made of a composite synthetic resin, in which at least two types of resin selected from a high molecular weight polyethylene resin, an ultra high molecular weight polyethylene resin, are combined. , an olefin-based thermoplastic elastomer resin, a silicone resin, etc., so that the coefficient of friction is small, thereby providing good scratch resistance. In this regard, the epidermal layers (16), (16) may be omitted, and it is also possible to omit only one of the epidermal synthetic resin layers (16), (16) on both sides.
    [0019]
    FIG. 4 shows a hollow sealing portion (9) formed outside a lateral portion (7) of a clamping portion (2), and a non-thermofusible portion (17) formed, partly without use a heat fusion on the inner surface of the clamping portion (2) corresponding to the inner surface of the lateral portion (7) as seen from the left side in Figure 4.
    [0020]
    In addition, a contact portion (6) is provided only on the long retaining portion (5) in the same manner as that of the body (1) of the molded product according to the embodiment shown in Fig. 1. In this case , it is also possible to provide a part (6) of contact on one or both of the two parts (5), (5) retaining formed on the part (7) side, seen from the left side in the figure ( 4) which is provided with a non-heat-fusible portion (17).
    [0021]
    In addition, the hollow sealing portion (9) may take various forms such as a square, a circle, an ellipse and the like, if desired, and may be formed at a desired location outside the portion (8) connecting or the lateral portion (7) of the core material (3).
    [0022]
    In addition, to allow the opening and closing of doors and chests, etc. in a mild manner, a synthetic resin slip layer (12) may be formed, if desired, on a portion of the outer surface of the hollow seal portion (9).
    [0023]
    The epidermal layer (16) of synthetic resin may also be formed on an exposed portion on an outer surface of the connecting portion (8) or on the lateral portion (7) of the clamping portion (2), if desired .
    [0024]
    The aforementioned slip layer (12) and the epidermal layer (16) are made of a composite synthetic resin, wherein at least two types of resin selected from a high molecular weight polyethylene resin, a weight polyethylene resin ultra-large molecular, olefin-based thermoplastic elastomer resin, silicone resin, etc. are combined so that its thickness is between 0.01 mm and 0.1 mm, thus making the coefficient of friction small and giving good scratch resistance.
    [0025]
    The epidermal layer (16) may also be of a synthetic resin such as polyethylene very crystalline so as to give a good luster and scratch resistance and thus its thickness may be between 0.05 mm and 0.5 mm.
    [0026]
    FIG. 5 shows a contact portion (6) formed on a long holding portion (5) that is seen on the right side of the figure and also on a short holding portion (5), which is the lowest of two upper and lower short holding portions (5), (5), which can be seen on the left side of the figure. In other words, in the body (1) of the molded product, according to the embodiment shown in FIG. 5, the long and short retention portions (5), (5) of a thermoplastic elastomer are formed at the same time. interior of the lateral parts (7) so that the retaining part (5) protrudes from one of the lateral parts, while the short retention portions (5) project from the other. A contact portion (6) is formed on a portion of the long retaining portion (5) as viewed from the right side of Figure 5, and is also formed over the entire surface of the lower, short portion (5) of retaining, that is to say, replacing the lower retaining portion of the left side of Figure 5. But in this respect, the portion (6) of contact can be formed in another desired position, as it is wants, for example, on a part of the lower retaining portion (5) or on the entire surface or part of the upper retaining portion (5) or over the entire surface, or on part of the part (5) short upper retaining or over the entire surface or part of the short (5) lower and upper retaining portions.
    [0027]
    FIG. 6 represents a method of continuous manufacture of a body (1) of molded product based on a core material (3) made of a hard synthetic resin, a hard synthetic resin being injected into a first machine (31) extrusion molding, and the core material (3) having a generally U-shaped cross-section is formed by a first extrusion die (32). Then, the core material (3) passes into a first cooling tank (33) and then into a drive roll (34) and opening zones (15) are cut by a cutting machine (35). various desired shapes, as shown in Fig. 8 in wall portions (14) and in a bottom portion of the generally U-shaped cross-section core material (3).
    [0028]
    In order to increase the adhesion strength of the heat-fusion between the core material (3) and the coating element (4), a heating device (41), which sends infrared rays or blows air heated, is installed to heat the surface of the core material (3). After being heated, the core material (3) enters a second mold die (37) inside which a thermoplastic elastomer, which is injected, is coextruded into an extrusion-molded product (1). comes from a second extrusion molding machine (36) and which is in the melt state to form a coating member (4) and a retaining portion (5), and a thermoplastic elastomer composition, which is injected and which comes from a third extrusion molding machine (38) and which is in the state of being melted to form a contact portion (6), the extrusion-molded product (1) passing through a second cooling tank (39), and being cut to the desired size.
    [0029]
    In addition, in the case where a hollow portion (9) is formed, an extrusion molding machine (not shown in the drawings) is added to ensure that inside the second die (37), the hollow sealing portion (9) and the coating element (4) are coextruded, the hollow sealing portion (9) being at the periphery of the element (4) of coating.
    [0030]
    Figure (7) shows a body (1) of molded product, in which a channel (21) for passing a window is formed in one piece with a lower part of a clamping part (2), a contact portion (6) being formed over the entire surface of the distal end portion of each of the retaining portions (5) formed within one of the side portions (7) and there is no retaining portion (5) and contact portion (6) formed on the other side portion (7).
    [0031]
    Then, a window (20) door is sealed by lips (22) of a channel (21) for passing a window, but to ensure a lifting operation and lowering of opening / closing the window (20) of the door, a layer (12) of sliding synthetic resin having a small coefficient of friction is formed on the surface of each of the lips (22). In addition, an epidermal layer (16) having a good scratch resistance may be formed on an externally exposed surface.
    In this regard, although it is not shown in the drawings, the epidermal layer (16) may be formed directly on a surface of the core material (3).
    [0033]
    The slip layer (12) and the epidermal layer (16) of a synthetic resin are formed of a composite synthetic resin, wherein at least two types of resin selected from a high molecular weight molecular weight polyethylene resin, a ultra-large polyethylene resin, olefin-based thermoplastic elastomer resin, silicone resin, etc. are combined thereby making the coefficient of friction small and giving good scratch resistance.
    [0034]
    In addition, the epidermal layer (16) may be formed of a synthetic resin such as highly crystalline polypropylene, etc. in order to give a good shine and good resistance to scratching.
    [0035]
    Figure 8 shows that gap portions are cut and formed in the core material (3).
    [0036]
    Figure 9 shows a conventional embodiment of a body (1) of molded product having no contact portion (6) formed on the surface of a retaining portion (5).
    <A thermoplastic elastomer composition forming each of the contact parts (6)>
    Next, there will be described a thermoplastic elastomer composition each forming contact portions (6).
    [0038]
    Constituent (a): Essential constituent
    Component (a) is a block copolymer comprising at least two polymer A blocks mainly comprising a vinyl aromatic compound and at least one polymer B block mainly comprising a conjugated diene compound, or a product obtained by hydrogenating the block copolymer or one of their mixtures. As an example, there can be mentioned block copolymers of vinyl aromatic compound and conjugated diene compound having structures such as A-B-A, B-A-B-A and A-B-A-B-A, and / or their hydrogenated products.
    [0039]
    The above block copolymer (hydrogenated means a block copolymer and / or a hydrogenated block copolymer) comprises from 5 to 60% by weight, preferably from 20 to 50% by weight of a vinyl aromatic compound.
    [0040]
    Preferably, the polymer block A comprising mainly a vinyl aromatic compound comprises only a vinyl aromatic compound or is a copolymer block of 50% by weight or more, preferably 70% by weight or more, of a vinyl aromatic compound. and a conjugated diene compound or hydrogenated product thereof.
    [0041]
    Preferably, the polymer block B, comprising mainly a conjugated diene compound, comprises only a conjugated diene compound or is a copolymer block of 50% by weight or more, preferably 70% by weight or more, of a conjugated diene compound and a vinyl aromatic compound, or one of their hydrogenated product.
    [0042]
    In each of the polymer A sequence mainly comprising a vinyl aromatic compound, and the polymer B block mainly comprising a conjugated diene compound, the distribution of the vinyl compound or conjugated diene compound in the molecular chain may be random, progressive (the monomer component increases or decreases along the molecular chain), partially sequenced or any other combination.
    [0043]
    When there are two or more A polymer sequences mainly comprising a vinyl aromatic compound, or two or more polymer B blocks mainly comprising a conjugated diene compound, each may have the same structure or have a different structure.
    [0044]
    As the vinyl aromatic compound constituting the (hydrogenated) block copolymer, one or two or more thereof may be selected, for example, styrene, methylstyrene, vinyltoluene, p-tert-butyl styrene and the like. Among them, styrene is preferred. As the conjugated diene compound, one or two or more thereof may be selected, for example butadiene, isoprene, 1,3 pentadiene, 2,3-dimethyl-1,3-butadiene and the like. Of these, butadiene, isoprene and combinations thereof are preferred.
    [0045]
    The micro-bond in the polymer B-block mainly comprising a conjugated diene compound can be chosen arbitrarily.
    [0046]
    In a butadiene sequence, preferably 1-2 micron linkage, represents from 20 to 50%, in
    particular from 25 to 45 L
    [0047]
    In a polyisoprene block, preferably from 70 to 100% by weight of the isoprene compound has a 1.4 micro-linkage, and at least 90% or more of the aliphatic double bonds, based on the isoprene compound, are hydrogenated.
    [0048]
    With respect to the weight average molecular weight of the (hydrogenated) block polymer having the above structure used in the present invention, the lower limit value is in the range of 5,000 or more, preferably 10,000 or more, and better than 80,000 or more, and the upper limit value is in the range of 400,000 or less, preferably 300,000 or less and more preferably 150,000 or less. The distribution of the molecular weight (ratio of the weight average molecular weight (Mw) to the number-average molecular weight (Mn) (Mw / Mn)) is preferably less than or equal to 10, preferably less than or equal to 5 and better than or equal to 2. The molecular structure of the (hydrogenated) block copolymer can be linear, branched, radial or any of their combinations.
    [0049]
    Constituent (b): Essential constituent
    Component (b) used in the present invention comprises a crystalline ethylene or propylene homopolymer or a crystalline copolymer comprising mainly ethylene or propylene. They include crystalline ethylene polymers, such as high density polyethylene, low density polyethylene and a copolymer of ethylene and butene-1, and crystalline propylene polymers, such as isotactic polypropylene, a copolymer propylene and ethylene, a copolymer of propylene and butene-1 and a ternary copolymer of propylene, ethylene and butene 1. Polypropylene resins are preferred among them.
    [0050]
    Constituent (c): Essential constituent
    A plasticizer component (c) for the rubber used in the present invention may be a non-aromatic plasticizing component for rubber or an aromatic plasticizing component for rubber and an ester plasticizer may also be used. But, in particular, a non-aromatic mineral oil and an ester plasticizer are preferred. An example of a non-aromatic mineral oil plasticizer is a parafinic plasticizer, wherein the number of carbons in the parafinic chain is 50% or more of the total number of carbons.
    [0051]
    Constituent (d): Essential constituent
    A petroleum resin component (d) used in the present invention is a resin obtained by copolymerizing in the form of a raw material an unsaturated hydrocarbon obtained in various processes, in particular a naphtha decomposition process in the refinery industry. oil and in the petrochemical industry. Examples include aliphatic petroleum resins comprising C5 moieties as raw material, aromatic petroleum resins comprising C9 moieties as raw material, alicyclic petroleum resins including dicyclopentadiene as raw material, and terpene resins and the like. copolymerized petroleum resins obtained by copolymerizing two or more of them and furthermore hydro-enefined petroleum resins obtained by hydrogenating them, and the like. The hydrogenated petroleum resins of the above resins are obtained by hydrogenating the above resins by methods known to those skilled in the art. Specifically, commercial products such as I-MARV (a hydrogenated petroleum resin) manufactured by Idemitsu Kosan Co., Ltd., ARKON (a hydrogenated petroleum resin) manufactured by Arakawa Chemical Industries, Ltd., Clearon (a hydrogenated terpene resin). ) manufactured by YASUHARA CHEMICAL Co., Ltd., and Escorez (an aliphatic hydrocarbon resin) manufactured by Tornex Co., Ltd., can be used.
    [0052]
    The thermoplastic elastomer composition comprises the aforementioned components (a), (b), (c) and (d) and these components are combined so that the thermoplastic elastomer composition comprises: from 30 to 60 parts by weight of component (a); from 10 to 30 parts by weight of component (b); and from 25 to 55 parts by weight of component (c); and in addition to (a) + (b) + (c) = 100 parts by weight; from 3 to 15 parts by weight of component (d); preferably from 40 to 60 parts by weight (a); from 10 to 30 parts by weight of component (b); and from 25 to 45 parts by weight of component (c); and in addition to (a) + (b) + (c) = 100 parts by weight; from 3 to 15 parts by weight of component (d).
    [0053]
    Constituent: Mineral Charge
    In the thermoplastic elastomer composition for forming a contact portion (6) of the extrusion molded product having a core material according to the present invention, a mineral filler component may be combined, if desired, as a constituent (e) to be added to the components (a) to (d) mentioned above. The constituent (e) has the effect of improving certain properties, such as the permanent deformation by compression of the molded product obtained from the thermoplastic elastomer composition, as well as an economic advantage due to an increase in quantity. Examples of component (e) include wollastonite, chlorite, calcium carbonate, talc, silica, diatomaceous earth, barium sulfate, magnesium carbon, magnesium hydroxide, mica, clay, titanium oxide, carbon black, fiberglass, hollow glass beads, carbon fiber, calcium titanate fiber, natural silicic acid, synthetic silicic acid (white carbon) and the like. Of these, calcium carbonate, wollastonite, chlorite and talc are particularly preferred.
    [0054]
    The content of component (e) is preferably from 1 to 20 parts by weight based on (a) + (b) + (c) = 100 parts by weight mentioned above.
    [0055]
    An example of use of the materials of the molded body (1) used in the present invention will be described. The core material (3) having a cross-section, generally U-shaped, comprises a metal or a hard synthetic resin. An olefinic resin or a mixed synthetic resin obtained by mixing an olefin resin of 20% to 50% by weight of a powder, such as talc, having a durometer hardness of type A (JIS K6253, value after 15 seconds) is used. ) greater than or equal to 90, as the synthetic resin lasts to increase the stiffness and decrease the coefficient of linear expansion. Examples of use of the metal include iron, aluminum, stainless steel etc.
    [0056]
    Further, examples of use of the thermoplastic elastomer material forming the coating member (3) and the retaining portion (5) include an olefinic thermoplastic elastomer or a styrenic thermoplastic elastomer having a type A durometer hardness. (JIS K6253, value after 15 seconds) from 40 to 80, preferably from 45 to 65.
    [0057]
    Examples of use of the material of the thermoplastic elastomer composition forming the contact portion (6) also comprise a thermoplastic elastomer composition having a type A durometer hardness (JIS K6253, value after 15 seconds) of 40 to 80, component (a) being composed mainly of a styrene rubber component.
    [0058]
    In addition, a type A durometer hardness (JIS K6253, value after 15 seconds) of 20 to 50 is used for the thermoplastic elastomer forming the hollow sealing portion (9).
    [0059]
    Descriptions will be given of an example of the thermoplastic elastomer composition which is referred to herein as material A, forming the contact portion (6) of the extrusion molded product having a core material according to the present invention. But, the example will be given by way of illustration and the invention is not limited and can be modified at will remaining within the scope of the technical idea of the present invention.
    [0060]
    Material A, i.e., the thermoplastic elastomer composition for forming the exemplary contact portion (6) is produced by combining the components mentioned below so that component (d) is combined with component (a) + component (b) + component (c) = 100 parts by weight.
    [0061]
    (A) 50 parts by weight of a block copolymer of styrene and isoprene having a styrene content of 30% by weight, and an isoprene content of 70% by weight, a weight average molecular weight of 260,000 and a molecular weight distribution of 1.3, and with 90% in addition to hydrogenation, trade name: SEPTON 4055, manufactured by KURARAY CO., LTD.
    [0062]
    Constituent (b) 15 parts by weight of a polypropylene random copolymer having MFR (230 ° C, 21.18 N) of 7 g / 10 min., Trade name FW4BT, manufactured by Japan Polypropylene Corporation.
    [0063]
    Component (c) 35 parts by weight of a plasticizer for non-aromatic hydrocarbon rubber (paraffinic oil) having a weight average molecular weight of 540, trade name: Diana Process Oil PW-90, manufactured by
    Idemitsu Kosan Co., Ltd. (In this regard, as described above, component (a) + component (b) + component (c) = 100 parts by weight).
    [0064]
    Component (d) 10 parts by weight of a petroleum resin having a softening point of 140 ° C, an average molecular weight of 910, and a density of 1.03, trade name: I-MARV P-140, manufactured by Idemitsu Kosan Co., Ltd.
    A pellet-like material obtained by mixing and melting and kneading the above components is used.
    [0065]
    Using the material A, ie the thermoplastic elastomer composition comprising the above-mentioned constituents, as an example and a comparison material B, the following test methods are carried out and the values of Table 1. In this respect, the numerical values in the table indicate the property values of the thermoplastic elastomer used for the holding portion (5).
    [0066] 1. Hardness
    According to JIS K 6253, using a 6.3 mm thick braided sheet and a specimen, the type A durometer hardness is measured and the value is obtained after 15 seconds. The temperature at which the measurement is made is 23 ° C.
    2. Tensile strength module at 100% and elongation:
    The measurement of the tensile strength of the 100% modulus and the elongation is in accordance with JIS K 6301. For the test piece, a 2 mm thick compressed sheet having a dumbbell shape no. 3 for use. The pulling speed is 500 mm / min. The measurement is carried out at a temperature of 23 ° C.
    [0068] 3. Coefficient of static friction
    Measuring device "HEIDON (manufactured by SHINTO Scientific Co., Ltd.)"
    Sliding object; metal ball
    Test tube; an extruded ribbon with a thickness of 1 mm Measuring condition;
    Vertical load 100g Test speed 200 mm / min
    Displacement distance measured at 50 mm.
    [Table]
    [0070]
    Table 2 then shows comparisons between the retaining force in the case where a contact portion (6) is provided on the body retaining portion (5) (1) of the molded product and the retaining force in the where one does not provide a part (6) of contact of this kind.
    [0071]
    In Example 1, a contact portion (6) according to the present invention is formed on the retaining portion (5). The holding portion (5) of Comparative Example 1 is merely conventional and there is no contact portion (6) thereon.
    [0072]
    Measurements of the holding forces on a part, that is to say on a molded product, a week after its molding and on a part, that is to say on a molded product after an aging test thermal (or on a part, that is to say on a molded product that was kept at 80 ° C in an oven for 2000 hours before being removed).
    [0073]
    As is clear from Table 2, it can be seen that the holding force according to Example 1 having a contact portion (6) formed on a portion (5) of
    Retention is larger than that of Comparative Example 1 having a simply conventional retaining portion (5) and provides a solution to the problem that the body (1) of the molded product falls easily from the wing.
    [0074]
    [0075]
    Here, in the case where the norm of evaluation of the retaining force is fixed at 60N / 100mm, example 1 does not have the possibility of the fall mentioned above because table 2 shows that a piece ordinary (a molded product one week after molding) and a heat-aged test piece have holding forces of 75N / 100mm and 70N / 100mm respectively, both exceeding 60N / 100mm.
    [0076]
    In contrast, Comparative Example 1 is likely to cause the aforementioned drop of the wing because Table 2 shows that an ordinary piece and a heat-aged test piece have the holding forces. of 53N / 100mm and 48N / 100mm respectively, both being less than 60N / 100mm.
    权利要求:
    Claims (8)
    [1" id="c-fr-0001]
    An extrusion molded product having a core material to be mounted on a flange (11) around the periphery of an opening of an automobile body, such as a door, a trunk and a rear door, the body (1) of the molded product comprising a generally U-shaped cross-section clamping portion (2) of a core material (3) and a coating element (4); (2) having retaining portions (5) formed within its side portions (7), at least one of the retaining portions (5) having a contact portion (6) of a single holding with the retaining portion (5) on a portion abutting on a flange (11), the static coefficient of friction of the contact portion (6) being greater than that of the retaining portion (5) and the thermoplastic elastomer composition forming the contact portion (6) comprising: from 30 to 60 parts by weight of a component (a): a copolymer sequence comprising at least two polymer A sequences mainly comprising a vinyl aromatic compound and at least one polymer B block mainly comprising a conjugated diene compound and / or a hydrogenated block copolymer obtained by hydrogenation of the block copolymer; from 10 to 30 parts by weight of a component (b): a crystalline ethylene or propylene homopolymer or a crystalline copolymer comprising mainly ethylene or propylene; and from 25 to 55 parts by weight of a component (c): a rubber plasticizer; and in addition to (a) + (b) + (c) = 100 parts by weight mentioned above: from 3 to 15 parts by weight of a component (d): a petroleum resin and / or a resin of hydrogenated oil obtained by hydrogenation.
    [2" id="c-fr-0002]
    An extrusion molded product having a core material according to claim 1, wherein the contact portion (6) is formed in a layer-like manner on the surface of the tip side of the holding portion (5).
    [3" id="c-fr-0003]
    An extrusion molded product having a core material according to any one of claims 1 to 2, wherein the contact portion (6) is formed over the entire surface of the distal end portion of the portion (5). or on the entire surface of the retaining portion (5).
    [4" id="c-fr-0004]
    An extrusion molded product having a core material according to any one of claims 1 to 3, wherein the contact portion (6) is formed on the holding portion (5) only on one of the portions (7). ) sideways.
    [5" id="c-fr-0005]
    An extrusion molded product having a core material according to any one of claims 1 to 3, wherein the contact portion (6) is formed on the retaining portions (5) on the two side portions (7). .
    [6" id="c-fr-0006]
    An extrusion molded product having a core material according to any one of claims 1 to 5, wherein the thermoplastic elastomer forming the coating element (4) and the retaining portion (5) have a durometer hardness. type A from 45 to 65.
    [7" id="c-fr-0007]
    An extrusion molded product having a core material according to any one of claims 1 to 6, wherein a hollow joint portion (9) is formed on an outer periphery of the clamping portion (2).
    [8" id="c-fr-0008]
    8. An extrusion molded product having a core material as claimed in any one of claims 1 to 7, wherein the generally U-shaped core material (3) is of a synthetic resin or in a metal.
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    同族专利:
    公开号 | 公开日
    JP6005311B1|2016-10-12|
    JP2017132397A|2017-08-03|
    US20170217069A1|2017-08-03|
    CN107022165A|2017-08-08|
    FR3047195B1|2019-09-27|
    引用文献:
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    EP0482740A2|1990-10-26|1992-04-29|Draftex Industries Limited|Thermoplastic materials and products|
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    US20110219699A1|2010-03-15|2011-09-15|Naohisa Miyakawa|Extrusion molded product having a core material|
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    JP2014113997A|2012-12-10|2014-06-26|Tokiwa Chemical Industry Co Ltd|Extrusion molding having core material|CN107614391B|2015-12-25|2020-04-07|安隆化成株式会社|Food container and method for manufacturing same|
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    JP6812993B2|2018-01-30|2021-01-13|豊田合成株式会社|Outer weather strip|
    法律状态:
    2017-06-20| PLFP| Fee payment|Year of fee payment: 2 |
    2018-05-30| PLFP| Fee payment|Year of fee payment: 3 |
    2018-11-02| TQ| Partial transmission of property|Owner name: TOKIWA KEISEI CO., LTD., JP Effective date: 20181001 Owner name: TOKIWA CHEMICAL INDUSTRIES CO., LTD., JP Effective date: 20181001 |
    2019-05-13| PLFP| Fee payment|Year of fee payment: 4 |
    2020-04-30| PLFP| Fee payment|Year of fee payment: 5 |
    2021-05-04| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2016014979A|JP6005311B1|2016-01-29|2016-01-29|Extruded product with core material|
    JP201614979|2016-01-29|
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