• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    PACKING MATERIAL, AND, PACKAGING FOR A PRODUCT. A packaging material for forming at least part of a package for a gas-releasing product includes a one-way pressure relief valve (18) including a first internal film (10), being provided with at least one inlet opening. (13, 14) cast, and a second outer film (11) covering at least one inlet opening (13, 14) and being glued to the first inner film (10) to form a channel portion (12) between the inner film and the external. The channel portion (12) communicates with the surroundings of the package through at least one outlet opening (15) spaced apart from at least one inlet opening (13, 14). The pressure relief valve (18) additionally includes a liquid (19) provided in the channel portion (12) next to at least one inlet opening (13, 14) The outer film (11) is a soft film that has a such flexibility or elasticity that under tension tests a force of less than 5 N that is necessary to elongate a test piece that is 15 mm wide by 5%.
    公开号:BR112012000512B1
    申请号:R112012000512-0
    申请日:2010-07-02
    公开日:2020-11-17
    发明作者:Kirsten Lykke；Peter Hansen
    申请人:Amcor Flexibles Transpac B.V.B.A.；
    IPC主号:
    专利说明:

    Technical field
    [001] The present invention relates to a packaging material to form at least part of a package for a product that releases gases, especially for a food product, and being provided with a pressure relief valve, normally closed in a predetermined excess pressure, said pressure relief valve including a first internal film of the package, and being provided with at least one hollow inlet opening, and a second external film, preferably a polymeric film, to be an external film of the package and covering the entrance opening in the first inner film and being glued to the first inner film to form a channel or pocket portion between the first inner film and the second external film, said channel or pocket portion communicating with the surroundings of the package through of at least one spaced and isolated outlet opening, the first inner film having a first surface and a second surface and the second external film having a first surface and a second surface, the second surface of the first internal film facing the second surface of the second external film, said pressure relief valve additionally including a liquid provided in the channel or in the pocket portion and solid spacer provided in the channel or in the pocket portion near the entrance opening, said spacer means providing a space between the second surface of the first inner film and the second surface of the second outer film.
    [002] The word “film” must be understood here in its broadest sense, encompassing mono films, with multiple co-extruded and laminated layers.
    [003] The word “opening” must be understood here in its broad sense, as it covers crevices formed by a knife, perforations of holes made by means of a needle and perforations or laser cuts in various ways. Foundations
    [004] Packages and / or packaging materials that have a pressure relief valve are known from EP 0144011B2, EP 0559598 Bl, WO 88/07479, DE 25 37 317 Al, EP 0 023 403 Bl, EP 0 738 227 Al, DE 44 35 492 Al, EP 0 760 790 Bl, WO 2004/048225 Al, and W) 2006/012282 Al. EP 0144 011 B2, EP 0 559 598 Bl, W) 88/07479, WO 2004 / 048225 Al w WO 2006/012282 Al all disclosed materials in which a liquid film and spacer means can be provided in the channel region between the first inner film and the second inner film.
    [005] It should also be noted that in general, flexible packaging materials are provided with an extremly oriented film, such as OPP (oriented polypropylene), OPA (oriented polyamide) or PET (polyethylene terephthalate) as suggested in WO 2004 / 048335 Al in order to provide the external film with a mark. However, when using such films for external film in a packaging material with the integrated valve, the opening pressure of the valve is higher due to the stiffness or low elasticity comparatively of these films. Discovery of the Invention
    [006] An object of the present invention is to provide a packaging material that has an integral, one-way pressure relief valve with a low opening pressure.
    [007] An additional objective of the invention is to provide a packaging material including an integral pressure relief valve with a reliable and reproducible opening pressure.
    [008] The packaging material according to the invention is characterized by the fact that the second outer film is a soft film that has a flexibility or an elasticity that in a stress test a force of less than 5N is required to elongate a test piece of it having a width of 15mm. For 5%, the stress test being designed according to ISO 527 / ASTM D 638, in which a test piece with a width of 15mm is stuck between two sets of jaws being Inter spaced by exactly 100mm and pulled in tension to a speed of 100mm / min and 5% elongation, ie 5mm, the force is recorded.
    [009] When the packaging material is not subjected to excessive internal pressure, or subjected to less pressure, the pressure relief valve remains in its normally closed position, where the liquid in the channel or in the pocket portion provides adhesion between the inner film and the outer film, in order to avoid an open connection between the inlet opening and the outlet opening. In the closed position of the valve, ambient air is also prevented from penetrating from the outlet opening to the inlet opening and thus inward and a package of which at least a part is formed of the packaging material. When the pressure in the package increases due to the gases that are released from the packaged product and reaches the predetermined excess pressure, the outer film is forced out from the inner film and the adhesion of the liquid film is reduced to provide an open connection between the entrance opening and exit opening. As a result, the excess pressure is released until a closing pressure is obtained allowing the outer film to bend back into the closed position of the valve, thus preventing air from the environment to penetrate the interior of the package through the opening. outlet, channel portion and inlet opening.
    [0010] Especially the elasticity of the external film allows an opening of the valve at a low excess pressure and a reliable closing of the valve at a lower pressure than the predetermined excess pressure. Tests have shown that it is possible to provide an opening pressure of less than 4 mbar and a reliable closing of the valve when the excess pressure has been released by discharging the gases generated through the valve. The stress tests were designed in a 5564 instruction.
    [0011] Additionally, it should be noted that flexible packaging, i.e. packaging being entirely formed of packaging material, such as flexible bags subject to rough handling during packaging at the factory and later, when unpacked in a store. Due to its softness and flexibility, the outer film is able to follow the inner film during rough handling and thus maintain the valve functionality of the packaging material.
    [0012] According to the invention, the force required to stretch the test piece of the second film by 5% is less than 4N, alternatively less than 3N, alternatively less than 2N, alternatively less than 1.5 N and optionally less than IN. A decrease in the force required to elongate the test piece by 5% allows a decrease in the opening pressure of the valve, i.e. allows a very low opening pressure of the valve.
    [0013] Additionally, according to the invention the packaging material may comprise small air pockets adjacent to the spacer means in the channel portion and close to at least one inlet opening.
    [0014] The air pockets decrease the excess pressure necessary to open the valve. Without being bound by theory, it means that these air pockets reduce the adhesion of the liquid and thus allow a lower opening pressure of the valve.
    [0015] Air pockets are formed by subjecting the packaging material to pressure in the region of the valve, especially in the region of the spacer medium, in order to elastically deform the outer film and subsequently release the pressure, in which the outer film moves at least partially out of the inner film due to its elasticity and thus forms air pockets adjacent to the spacer medium. Additionally, the outer film is slightly plastically deformed in the areas where it is pressed against the spacer.
    [0016] In practice, air pockets can be formed when a coil of packaging material in connection with its manufacture ends up on a roll and subsequently in connection with a longitudinal cut is unwound and rewound to form a roll of packaging material with a desired packaging width for which the packaging material will be used.
    [0017] Furthermore, according to the invention, the spacer means can provide an intermediate space of between 10 - 100pm, especially between 20-60 pm, between the second surface of the second outer film and the second surface of the first film internal.
    [0018] According to a configuration of the invention the spacer devices are smaller particles of a solid material placed in the channel in the pocket portion.
    [0019] According to a further embodiment of the invention, the spacer devices are one or more projections that protrude from the second surface of the first internal film. Like the protrusions from an integral part of the inner film, i.e., spacer devices, in the channel or pocket portion. This is not possible when using particles, since the quantity and position of particles are impossible to control exactly. In addition, the position and shape of the projections can be selected in order to obtain the desired opening pressure. Preferably, the at least one protrusion is pointed or linear.
    [0020] According to the invention, at least one of the small protrusions may be a protrusion of deposited materials, such as vacuum deposited aluminum, deposited on the second surface of the first inner film or a protrusion of printed materials, such as printing inks , printed on the second surface of the first inner film.
    [0021] Additionally, according to the invention, at least one of the small projections can also be a projection flange of a bottom hole or groove formed on the second surface of the first inner film, especially a protruding flange formed by a laser beam. Such a protruding flap is automatically formed when the bottom hole or groove is formed by a laser beam, like the protruding flap is formed when the laser beam melts the polymeric film.
    [0022] Additionally, according to the invention, at least one of the small projections can also be a projection flange of at least one inlet opening formed in the first inner film, especially a protruding flange formed by a laser beam. Such a protruding flap is automatically formed when the inner opening is formed by a laser beam penetrating the first inner film from a second surface.
    [0023] According to a further configuration of the present invention a, at least one outlet opening can be defined from at least one edge of the at least second outer film.
    [0024] According to a further configuration of the present invention a, at least one outlet opening may be an opening through the external film.
    [0025] A, at least one internal opening can be a suitable opening having a lumen, i.e., a hollow hole.
    [0026] In order to prevent the product to be packaged from entering the portion of the channel, the at least one inlet opening may be smaller in diameter than any element of the product to be packaged. When the product to be packaged is a granular or powder material, the diameter of at least one inlet opening may be smaller than the smaller particles of said product. Therefore, at least one inlet opening can have a diameter between 50 pm and 500 pm, optionally between 100 pm and 300 pm and optionally between 150 pm and 200 pm. However, it should be noted that at least one inlet opening can also have a diameter that exceeds 500 pm depending on the product to be packaged. When the product to be packaged is coffee beans, the diameter of at least one inlet opening is less than 200 pm, alternatively less than 150 pm.
    [0027] The first internal film can be provided with two or more slightly spaced inlet openings, e.g. g., being spaced by 0.1 - 0.2 mm, especially by 0.2 - 1.0 mm. Therefore, the first internal film can be provided with five, nine, eleven or more openings. Five and nine openings can be placed to form an X. Optionally, numerous slightly spaced openings can be placed in several arrays.
    [0028] When the first internal film is provided with numerous small openings, such as openings that have a diameter of 50-300 pm, they are preferably placed within an area of 0.5mm x 5mm, alternatively 4mm x 4mm , alternatively 3mm x 3mm, alternatively 2mm x 2mm and alternatively Imm x Imm.
    [0029] By increasing the number of small inlet openings, the opening pressure of the valve can be reduced. Correspondingly, the opening pressure of the valve can be reduced by using larger openings. However, numerous small openings are currently preferred.
    [0030] According to a further configuration of the present invention, the intermediate space between any inlet opening and any outlet opening can be between 2 and 40 mm, alternatively between 2 and 25 mm and alternatively between 2 and 10 mm.
    [0031] According to a further configuration of the present invention, the second surface of the second outer film and the second surface of the first inner film can be laminated to each other except in an un-laminated area forming the pocket channel or portion. The inner and outer film can be co-extensive. However, the outer film may also be of a smaller width than that of the inner film, in which the amount of packaging material is reduced.
    [0032] The second outer film may be a label covering a limited region of the first inner film, preferably a region of one size being substantially smaller than the size of the first inner film.
    [0033] According to a configuration of the present invention, the label is sealed to the second surface of the first inner film along two mutually spaced sealing lines to form a channel between them, at least one outlet opening being formed of at least one edge of the label.
    [0034] Optionally, the label can be sealed to the second surface of the first internal film along a closed sealing nail, at least one outlet opening being formed in the second external film within the closed sealing line.
    [0035] The label can be sealed to the first internal film by adhesion.
    [0036] The label may have a rectangular structure with a length (L) and a width (W) less than 10 mm, preferably less than 80 mm, and especially less than 60 mm. Excellent results have been obtained with a label having a length of 40 mm and a width of 20 mm.
    [0037] The outer film may be a film formed of, or including polyethylene (PE), especially linear density polyethylene (LDPE), linear low density polyethylene (LLDPE) or ultra low density polyethylene (ULDPE) or a PE film - EVOH - PE, that is, a co-extruded film that has a core layer of polyvinyl alcohol (PVOH) and a layer of polyethylene (PE) on each side of the same or polypropylene (PP), amorphous polyamide (amorphous PA) or an elastomer, especially a thermoplastic elastomer (TPE) or a hot melt, such as EVA (ethylene vinyl acetate) - based or PA (polyamide) - based on hot melt. An example of a PA-based hot foundry is VP 9676 available from Henkel GmbH and an example of an EVA-based hot foundry is VP 0332 available from Henkel GmbH.
    [0038] Depending on the elasticity of the film, the thickness of the outer film can be between about 10 pm and 200 pm, a force of less than 5N being still necessary to elongate the specified test piece by 5%.
    [0039] The first internal film can advantageously include an essentially gas-imperious layer, such as a metallization layer.
    [0040] The outer film can also include an essentially gas-imperious layer. An example of such a layer is an EVOH layer. Therefore, the outer film can be a PE-EVOH-PE film.
    [0041] Finally, the present invention relates to packaging for a product, especially a food product, releasing gases, in which at least a part of it is formed of a packaging material according to the invention.
    [0042] The packaging material according to the invention can be used as a lid for a container such as a bowl to form a flexible package, such as a bag, in its entirety. Brief Description of Drawings
    [0043] The invention is described below with reference to the accompanying drawings, in which:
    [0044] Fig. 1 is an isometric view of the package including a lid formed from a first configuration of the packaging material according to the invention.
    [0045] Fig. 2 is an enlarged view along line II-II in Fig. 1.
    [0046] Fig-3 is an isometric view of a bag made of a second configuration of a packaging material according to the present invention.
    [0047] Figs. 4 a-4d are enlarged sectional views along line IV-IV in Fig. 3 illustrating the function of the one-way pressure relief valve integrated in the packaging material according to the invention.
    [0048] Fig. 5 shows a section of the packaging material seen in the direction of arrow V in Fig. 3.
    [0049] Fig. 6 is an enlarged sectional view corresponding to that of Fig. 4 through a third configuration of the packaging material according to the present invention.
    [0050] Fig. 7 is an enlarged sectional view corresponding to that of Fig. 4 through a fourth configuration of the packaging material according to the present invention. Detailed Description of the Invention
    [0051] The packaging shown in Figs. 1 and 2 includes a bowl-shaped bottom 1 and a planar cover or lid 2, the latter being formed of packaging material according to the present invention.
    [0052] The bottom part is rectangular and includes a bottom 3. Two pairs of opposite side walls, 4,5 and 6,7 extend upwards from the bottom 3. At their upper ends the side walls continue into one common edge 8. The lower part is usually made of polypropylene (PP) and made by thermal formation or injection molding.
    [0053] The planar cover part 2 is sealed to the edge of the bottom part 1 to form a closed inner chamber 16 in which a gas-releasing food product is housed. For reasons of better understanding, the food product is not shown in Fig. 1, but only in Fig. 2. The packaging material from which the cover part 2 is formed includes a first inner film 10 having a first surface 20 and a second surface 21, and a second outer film 11, having a first surface 22 and a second surface 23. The two films are laminated to each other, second surface against second surface in its entirety except for a non-laminated area which extends towards the machine and forms a strict portion and channel 12 between the internal and external films 10, 11.
    [0054] An example of the inner film 10 of the packaging material is the co-ex laminate OPP 20 / metallized PETP 60, where co-ex OPP 20 designates a oriented polypropylene film, 20 pm thick co-extruded and layers thin seals on each side of it. PETP designates a polyester film 12 pm thick and PE 60 designates a polyethylene film 60 pm thick.
    [0055] The outer film 11 is a flexible or elastic film and an example of it is a 40 pm thick linear low density polyethylene (LLDPE) film. The force required to elongate a test piece of this film that is 15 mm wide in a stress test is 2.9 N.
    [0056] Two parallel and inter-spaced inlet openings 13, 14 are provided in the inner film 10 in the non-laminated channel portion 12. An outlet opening 15 in the outlet film 11 is spaced apart from the inlet openings 13, 14 in the film internal 10. The openings 13, 14 and 15 are placed in line as best seen in Fig. 1.
    [0057] The inlet openings 13, 14 in the inner film 10 therefore form a connection between the channel portion 12 and the inner chamber 16 of the package. Correspondingly, the outlet opening 15 in the outer film 11 forms a connection between the channel portion 12 and the surroundings.
    [0058] A liquid in the form of a silicon oil 19 containing small particles 17 is provided in the channel portion 12 adjacent to the inlet openings 13, 14. In the channel portion 12, adjacent to the outlet opening 15, oil of the silicon and particles. The particles 17 keep the internal and external films 10, 11 slightly spaced isolated while the silicon oil prevents an open connection between inlet openings 13, 14 and the outlet opening 15. A one-way pressure relief valve 18 is then provided by means of a channel portion 12, inlet openings 13 and 14, outlet openings 15 silicon oil 19 and particles 17. In its closed position, valve 18 prevents ambient air from entering the inner chamber 16 of the package, as shown in Fig. 2. However, valve 18 is caused to open when a specific excess pressure is generated in the inner chamber 16 of the package by the packaged food product 9. When the specific excess pressure is generated, the film outer 11 is slightly deformed and slightly lifted out of particles 17. The adhesive quality of the liquid is thus reduced and the outer film is further moved out from the inner film due to the pressure of the gas. As a result, gases can escape from the inner chamber 16 of the package, through the inlet openings 13, 14 of the channel portion 12 with silicon 19 and particles 17 and out through the outlet opening 15. The internal pressure is thus reduced and the valve closes in a sealed manner to prevent ambient air from entering the inner chamber 16 of the package through the inlet opening, channel portion and inlet openings. The secure closing of the valve is due to the elasticity or flexibility of the outer film 11 and the adhesive characteristic of silicon oil 19 allowing the outer film 11 to move or bend back to its closed position.
    [0059] With respect to the first modality above, it should be noted that instead of providing the non-laminated area as a channel portion, it can also be provided as a pocket as shown by means of the dotted Nails in Figure 1.
    [0060] Additionally, with respect to the first modality above, it should be noted that instead of using particles as spacer means, it is possible as a spacer means to use one or more protrusions protruding from the second surface of the first inner film and forming an integral part of the inner film as disclosed in the following second to fourth modalities of the packaging material.
    [0061] Figs. 3-5 illustrate a flexible packaging in the form of a pouch formed entirely by a packaging material according to a second embodiment of the invention. The second configuration of the packaging material includes a linear film which as an example can be an internal film 10 identical to that used in the first configuration above of packaging material. In other words, the inner film is the co-ex laminate CPP 20 / metallized PETP 12 / PE 60.
    [0062] The packaging material additionally includes an external film which as an example can be an external film 11 identical to that used in the first configuration above the packaging material. In other words, the outer film is a 40 pm thick linear low density polyethylene (LLDPE) film However, the outer film is a label 24 covering the limited region of the first inner film 10, said region being of a substantially size smaller than the size of the first inner film 10, as clearly illustrated in fig. 3.
    [0063] Before describing in detail the structure of the second configuration of the packaging material and the pressure relief valve thereof, it should be noted that the bag formed by the packaging material, in a known manner, has a rear seal 25, a seal and bottom 26 and a seal and top 27. Said three seals 25, 26, 27 are formed as seal and fin, ie, the packaging material is sealed inner face with inner face (PE 60 against PE 60). The seals provide a sealed inner chamber 28 housing a food product that releases gases. The food product is not shown in Figs. 3-5.
    [0064] Now, reverting to the structure of the packaging material, the inner film 10 is provided with five inlet openings 28 placed as the pips on the five sides of a dice, that is, in order to form an X. As an example , each of the inlet openings 28 can have a diameter of about 150 µm and are spaced by about 0.75 mm. The inlet openings 28 are cut by means of a laser beam from the second surface 21 of the inner film 10, where a small protrusion 29 is automatically formed along the flap of the inlet opening 28 when the laser beam melts the polymeric film internal 10.
    [0065] The label 24 is connected to the second surface 21 of the inner film 10 along the strip-shaped connection areas 30, 31 at the opposite edge portions of the label 24 as it appears more clearly in Fig. 5. A channel portion 32 is therefore formed between the strip-shaped connection areas 30, 31 and the second surface 21 of the inner film 10 and the second surface 23 of the label 24 formed in the inner film 11. The channel portion 32 is open at edges opposite the label 24 between the strip-shaped connection areas 30, 31, in which outlet openings 33, 34 are defined at opposite edges of the label 24 formed by the second inner film 11, as especially shown in Fig. 5.
    [0066] Now, reference is made to Fig. 4, illustrating that the small projections 29 form spacer devices between the label 24 and the inner film 10 in the channel portion 32 of the packaging material. In addition, a liquid, such as silicon oil 19 is provided in the channel portion 32. As an example, silicon oil 19 may have a viscosity of 10000cps. In addition, small air pockets 35 are provided adjacent to the small projections 29 in the channel portion 32 and close to the inlet openings 28. As described above, these small air pockets 35 are provided by subjecting the packaging material to pressure in the region the pressure relief valve formed by the label 24, the inner film 10, the protrusions 29, the silicon oil 19, the inlet openings 28 and the outlet openings 33, 34.
    [0067] In Fig. 4a the valve is shown in its closed position in which the adhesion of silicon oil 19 prevents a connection between inlet openings 28 and outlet openings 33, 34.
    [0068] Fig. 4b illustrates the situation where pressure is generated inside the package due to the gases released by the packaged product. The gases push the label through the inlet openings as shown by arrows 36. However, the valve is still completely closed.
    [0069] Fig. 4c illustrates the situation where the internal pressure has increased further and the valve begins to open and the label 24 around the inlet openings 28 is free of the adhesive force of the silicon oil 19 and slightly lifted out of the small bumps 29.
    [0070] Finally, Fig. 4d illustrates the situation where the pressure increased further and reached a predetermined excess pressure. The valve is now fully open and gases can escape from the inside of the package through inlet openings 28 along channel portion 32 and outwardly to bypass through outlet openings 33, 34, as indicated by arrows .
    [0071] In the above configuration, the opening pressure of the valve is 8-9 mbar and the closing pressure is a lower mbar pair.
    [0072] In a first modification of the second configuration above, the inner film is provided with nine laser cuts through holes that have a diameter of 150-200 pm and being placed so as to form an X within an area of about 2 mm x 2 mm.
    [0073] The outer film label is an EVA based film with a thickness of 50 pm (VP-0332 available from Henkel GmbH) having a length L of 40 mm and a width W of 20 mm.
    [0074] The area with the holes is provided centrally between the strip-shaped connection areas 30, 31 and centrally between the outlet openings 33, 34. The space S between the strip-shaped connection areas 30, 31, it is about 18 mm and the area with the holes is spaced 8 mm from the outlet openings 33, 34.
    [0075] In the first modification above, the opening pressure is about 9 mbar and the closing pressure is a lower mbar pair.
    [0076] In a second modification identical to the first modification except that the outer film label is a hot melt based -PA with 30 pm thickness (VP 9676 available from Henkel GmbH).
    [0077] In the second modification above the opening pressure is about 7 mbar and the closing pressure is a pair of mbar below.
    [0078] Comparative checks were made with a valve structure identical to the first and second modification of the second configuration of the packaging material according to the present invention except for the fact that the outer film label was a -PETP based film, or OPA, OPP with a thickness of 20 pm. The force required to elongate the specified test piece of these films by 5% was between about 10-20 N and the opening pressure was between 20-27 mbar.
    [0079] A comparison between the opening pressure of the configurations above the invention and the pressure and opening in the above comparative tests clearly demonstrates that a considerably lower opening pressure, desirably an opening pressure below 10 mbar, is obtained with a material of packaging according to the invention, having an elastic outer film being elongated by at least 5% by a force of 5N in the specified stress test than using less flexible films generally used as the outer film of a packaging material that has a pressure valve. integral discharge.
    [0080] In the third configuration of the packaging material according to the invention shown in Fig. 6, the spacer devices on the second surface 21 of the inner film 10 are formed by tabs protruding from the holes or bottom grooves formed on the second surface 21 of the film inner 10. The protruding flaps 37 are provided by forming the bottom holes or slots 38 by means of a laser beam directed against the second surface 21 of the inner film 10. Additionally, the inner film 10 is provided with at least one inlet opening 39 Otherwise, the third configuration of the packaging material essentially corresponds to the second configuration described above, for which reason further description of it and the function of the integrated pressure relief valve here is omitted.
    [0081] In the fourth configuration of the packaging material according to the present invention shown in Fig. 7, the spacer means of the second surface 21 of the inner film 10 is provided by means of projections 40 protruding from the second surface 21 of the inner film 10 and being formed by a printed matter, such as ink printed on the second surface 21 of the inner film 10 or by deposited material, such as aluminum vacuum deposited on the second surface 21 of the inner film 10. The protrusions 40 are pointed or linear . Additionally, the inner film 10 is provided with at least one inlet opening 41 connecting the inside of the package formed by the packaging material to the channel portion. Otherwise, the structure of the packaging material according to the fourth configuration corresponds essentially to that of the second configuration described above. Also, the function of the pressure relief valve integrated here is essentially the same as described above with reference to the second configuration. For this reason, the additional description of the packaging material structure and valve function is omitted.
    [0082] Additionally, it should be noted that although the second, third and fourth configurations described above have outlet openings defined at the outer edges of the label formed from external film, these configurations can also be incorporated into other configurations of the packaging material, having at least at least one outlet opening formed as a hollow opening, as described with reference to the first List of Reference numbers. 1. Bowl-shaped bottom 2. Planar cover part 3. Bottom 4-5, 6-7. Two pairs of opposite side walls 8. Common edge 9. Food product 10. First inner film 11. Second inner film 13. Eulraih opening in the inner film .Abem..de ..-. E, le,.,. „E "" d '- 1. .O . Second soperfioie of m. mlorno i 23. Second surface of outer film 11, yd, .od., .. do 25. Entrance opening 29. Small projections 30. 31. Strip-shaped connection areas 32. Pocket or channel portion 37. Flaps overhang 38. Bottom holes or grooves 39. Inlet opening 40. Overhangs 41. Inlet opening
    权利要求:
    Claims (25)
    [0001]
    1. Packaging material to form at least part of a package for a product that releases gases and being provided with a pressure relief valve (18) normally closed and opening at a predetermined excess pressure, the pressure relief valve including a first inner film (10), to be an inner film of the package being provided with at least one inlet opening (13, 14; 28; 39; 41) hollow and a second outer film (11), to be a film outer packaging and covering the opening in the first inner film (10) and being glued to the first inner film (10) to form a pocket channel or portion (12; 32) between the first inner film and the second outer film, the pocket channel or portion (12; 32) between the first inner film and the second outer film, the pocket channel or portion (12; 32) communicates with the surroundings of the package through at least one outlet opening (15 ; 33, 34) spaced apart from an entrance opening, the prime the first inner film (10) having a first surface (20) and a second surface (21) and the second external film (11) having a first surface (22) and a second surface (23), the second surface (21) and the second external film (11) the pressure relief valve (18) additionally includes a liquid (19) provided in the channel or pocket portion and solid spacer devices (17; 29; 37; 40) provided in the pocket channel or portion next to the entrance opening (13, 14; 28; 39; 41) the spacer means providing an intermediate space between the second surface (21) of the first inner film (10) and the second surface (23) of the second external film (11), characterized by the fact that the second external film (11) is a soft film that has such flexibility or elasticity that in tension it tests a force of less than 5 N that is necessary for elongate a test piece that is 15 mm wide by 5%, the stress test being designed according to ISO 527 / ASTM D 638, in which a 15 mm width test piece is stuck between two sets of jaws Inter being spaced by exactly 100mm and pulled in tension at a speed of 100mm / min and 5% elongation, ie 5mm, the force is recorded.
    [0002]
    2. Packaging material according to claim 1, characterized by the fact that the first inner film (10) and the second outer film (11) are polymer films.
    [0003]
    Packaging material according to either of claims 1 or 2, characterized in that the force required to stretch the test piece of the second film by 5% is less than 4N, alternatively less than 3N, alternatively less than 2N, alternatively less than 1.5N and alternatively less than IN.
    [0004]
    Packaging material according to any one of claims 1 to 3, characterized in that the packaging material includes small air pockets (35) adjacent to the spacer means in the channel or pocket portion and close to at least one opening input.
    [0005]
    Packaging material according to any one of claims 1 to 4, characterized in that the spacer means provides an intermediate space between 10-100pm or between 20-60 pm, between the second surface (23) of the second film outer (11) and the second surface (21) of the first inner film (10).
    [0006]
    Packaging material according to any one of claims 1 to 5, characterized in that the spacer devices are small particles (17) of a solid material placed in a channel or pocket portion (12).
    [0007]
    Packaging material according to any one of claims 1 to 5, characterized in that the spacer devices are one or more small protrusions (29; 37; 40) protruding from the second surface (21) of the first internal film (10).
    [0008]
    Packaging material according to claim 7, characterized in that at least one of the small protrusions is a protrusion of deposited materials, such as a vacuum of deposited aluminum, deposited on the second surface of the first inner film or a protrusion (40 ) of a printed matter, such as printing ink, printed on the second surface (21) of the first inner film (10).
    [0009]
    Packaging material according to either of claims 7 or 8, characterized in that at least one of the small projections is a flange projection (37) of a bottom or groove (38) formed on the second surface ( 21) of the first internal film (10).
    [0010]
    Packaging material according to any one of claims 7 to 9, characterized in that at least one of the small projections is a protruding flap (29) of at least one inlet opening (28) formed in the first internal film ( 10).
    [0011]
    Packaging material according to any one of claims 1 to 10, characterized in that the at least one outlet opening (33, 34) is defined by at least one edge of the at least second outer film (11).
    [0012]
    Packaging material according to any one of claims 1 to 10, characterized in that the at least one outlet opening is an opening (15) through the outer film (11).
    [0013]
    Packaging material according to any one of claims 1 to 12, characterized in that the at least one inlet opening is a suitable opening with a lumen, that is, a hollow orifice.
    [0014]
    Packaging material according to any one of claims 1 to 13, characterized in that the at least one inlet opening has a diameter that is between 50 pm and 500 pm such that the diameter is smaller than any component of the product to be packed in the packaging material.
    [0015]
    Packaging material according to any one of claims 1 to 14, characterized in that the first inner film is provided with at least two spaced inlet openings.
    [0016]
    Packaging material according to any one of claims 1 to 15, characterized in that the inlet opening (s) have / have a diameter between 100 pm and 300 pm or between 150 pm and 200 pm.
    [0017]
    17. Packaging material according to any of claims 15 or 16, characterized in that a number of inlet openings are placed within an area less than 5 mm x 5 mm or 4 mm x 4 mm or 3 mm x 3 mm or 2 mm x 2mm or 1 mm x 1 mm.
    [0018]
    18. Packaging material according to any one of claims 1 to 17, characterized in that the intermediate spaces between the inlet opening and the outlet opening are between 2 and 40 mm or between 2 and 25 mm or between 2 and 10 mm.
    [0019]
    19. Packaging material according to any one of claims 1 to 18, characterized in that the second surface (23) of the second outer film (11) and the second surface (21) of the first inner film (10) are laminated in relation to each other with the exception of a non-laminated area that forms the pocket or channel portion (12).
    [0020]
    Packaging material according to any one of claims 1 to 18, characterized in that the second outer film (11) is a label (24) covering a limited region of the first inner film (10).
    [0021]
    21. Packaging material according to claim 20, characterized in that the label is sealed to the second surface of the first internal film along two mutually spaced sealing lines to form a channel between them, at least an outlet being formed on at least one edge of the label.
    [0022]
    22. Packaging material according to claim 20, characterized in that the label is sealed to the second surface of the first inner film along a closed sealing line, at least one outlet opening being formed in the second outer film inside the closed sealing nail.
    [0023]
    23. Packaging material according to claim 21 or 22, characterized in that the label is sealed to the first internal film by adhesion.
    [0024]
    24. Packaging material according to claims 20 to 23, characterized in that the label has a rectangular profile with a length (L) and a width (W) less than 100 mm or less than 80 mm or less than 60 mm.
    [0025]
    25. Packaging for a product, especially for a food product, which gives off gases, characterized by the fact that at least a part of it is formed by a packaging material as defined in any one of claims 1 to 24.
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    同族专利:
    公开号 | 公开日
    EP2272661A1|2011-01-12|
    US20120196060A1|2012-08-02|
    US8557357B2|2013-10-15|
    MX2012000477A|2012-03-26|
    AU2010270334A1|2012-02-02|
    RU2528672C2|2014-09-20|
    RU2012104627A|2013-08-20|
    BR112012000512A2|2019-12-10|
    WO2011003831A1|2011-01-13|
    NZ597413A|2013-02-22|
    CN102612431A|2012-07-25|
    JP2012532800A|2012-12-20|
    WO2011003831A9|2011-03-10|
    CA2767141A1|2011-01-13|
    EP2451636A1|2012-05-16|
    EP2451636B1|2015-04-01|
    IL217226D0|2012-02-29|
    AU2010270334B2|2013-07-04|
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    US9199781B2|2013-03-14|2015-12-01|Sonoco Development, Inc.|Hermetic microwavable package with automatically opening steam vent|
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    EP3489011A1|2017-11-28|2019-05-29|Amcor Flexibles Denmark A/S|Flexible laminate with improved integrated pressure-release valve|
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    法律状态:
    2019-12-24| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-02-27| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-06-30| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-11-17| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 17/11/2020, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP20090165192|EP2272661A1|2009-07-10|2009-07-10|Packaging material with integrated pressure relief valve|
    EP09165192.7|2009-07-10|
    PCT/EP2010/059470|WO2011003831A1|2009-07-10|2010-07-02|Packaging material with integrated pressure relief valve|
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