High-barrier easy-to-tear visible beer packaging composite film and beer packaging self-standing bag

Abstract

The utility model relates to the field of flexible packaging materials, in particular to a high-barrier easy-to-tear visible composite film for beer packaging and a stand-up bag for beer packaging. The film layer structure of the high-barrier easy-to-tear visible composite film for beer packaging comprises a heat sealing layer, a first bonding layer, a linear easy-to-tear nylon layer, a PVA barrier layer, a second bonding layer and a toughening wear-resistant nylon layer, the heat sealing layer is specifically a biaxially oriented nylon film, introduction of a PP or PE material is avoided, the PVA barrier layer has high barrier property and is transparent and visible, and the second bonding layer is used for bonding the first bonding layer and the second bonding layer. A traditional aluminum-containing barrier material is replaced, the problem of lack of transparency can be solved, and the composite film which is high in barrier property, linear, easy to tear, transparent and visible and is used for beer packaging can be prepared in cooperation with the linear easy-to-tear nylon layer. The self-standing bag for beer packaging not only has the advantages of high barrier, easiness in tearing and visibility on the film layer structure, but also has a bag bottom self-standing design and an in-bag filtering film structure on the packaging structure, has good self-standing performance and a bubble filtering function, and comprehensively realizes the effects of fresh beer locking, easiness in tearing and visibility in packaging of the self-standing bag and high filling capacity.

Description

Technical Field

[0001] The utility model relates to the field of flexible packaging materials, in particular to a high-barrier, easy-to-tear, visible composite film for beer packaging and a beer packaging stand-up bag. Background Art

[0002] Traditional beer packaging containers are mostly glass bottles or cans, which are heavy and fragile during transportation and use. However, with the advancement of packaging technology, more and more companies are beginning to use plastic packaging bags for beer filling and packaging.

[0003] Beer packaging materials must first meet the requirements of having excellent barrier properties, effectively blocking the penetration of gases such as oxygen, water vapor and carbon dioxide, thereby ensuring the freshness and taste of the beer; at the same time, they must also have good mechanical properties and be able to withstand the pressure and impact during beer filling and transportation; in addition, good transparency can clearly display the color and foam of the beer, and sufficient stiffness can keep the packaging bag containing beer upright to prevent tipping and spilling; and good opening performance can make it easy for consumers to open the package and prevent the contents from spilling when opening.

[0004] At present, the common beer packaging bags on the market are mainly PE bags, PET bags or PA bags. Chinese patent CN2837224Y discloses a pressurized beverage soft packaging bag. The packaging bag body has a composite film layer structure of a plastic inner film, a polyester interlayer and a nylon outer film. It can be used for beer filling, but it does not solve the technical problem of the film material for beer packaging having high barrier and high mechanical strength properties while being easy to tear and transparent. Utility Model Content

[0005] In order to solve the problem that the film material for beer packaging has high barrier and high mechanical strength properties while being easy to tear and transparent, the utility model provides a high-barrier, easy-to-tear, visible composite film for beer packaging. The film layer structure includes a heat-sealing layer, a first adhesive layer, a linear easy-tear nylon layer, a PVA barrier layer, a second adhesive layer and a toughened and wear-resistant nylon layer, which are arranged in sequence from bottom to top.

[0006] In one embodiment, the heat-sealable layer is a heat-sealable biaxially oriented nylon film with a thickness of 15-30 μm.

[0007] In one embodiment, the linear easy-tear nylon layer is prepared from PA / MXD6 or PA / long carbon chain nylon by biaxial stretching technology, and has a thickness of 15-30 μm.

[0008] In one embodiment, the PVA barrier layer is a water-resistant modified PVA coating, which is directly coated on the surface of the linear easy-tear nylon layer by online coating, and the coating thickness is 0.3-1 μm.

[0009] In one embodiment, the toughened and wear-resistant nylon layer is a biaxially oriented nylon film made of nano-modified toughened nylon, and has a thickness of 15 to 30 μm.

[0010] In one embodiment, the first adhesive layer and the second adhesive layer are both made of polyurethane glue or acrylic glue, and have a thickness of 1-2 μm.

[0011] The utility model also provides a beer packaging self-supporting bag, comprising a bag body and a bag bottom, which is made of the high-barrier, easy-to-tear, visible composite film for beer packaging as described in any of the above items;

[0012] The bag body includes a first side surface of the bag body and a second side surface of the bag body, both of which have a convex rectangular "convex" film on the upper portion;

[0013] The bag bottom is clamped between the first side surface of the bag body and the second side surface of the bag body, and is heat-sealed with the first side surface of the bag body and the second side surface of the bag body at the periphery to form a heat-sealed edge, an opening section and a accommodating cavity;

[0014] The opening section is the entire or partial top edge section of the rectangular protruding portion of the bag body that is not heat-sealed;

[0015] The bag bottom is provided with a bag bottom film center line, wherein when the bag bottom is folded along the bag bottom film center line, the bag bottom can be hidden inside the bag body, wherein when the bag bottom is unfolded along the bag bottom film center line, the first side surface of the bag body and the lower part of the second side surface of the bag body can be stretched open to form a self-supporting structure of the bag body.

[0016] In one embodiment, a filter membrane is further included, which is fixed to the upper inner side of the bag body by heat sealing at the periphery, dividing the accommodating cavity into an upper cavity and a lower cavity for filtering beer foam.

[0017] In one embodiment, a linear tear-off notch is provided on the protruding rectangular portion of the upper portion of the bag body, and the opening direction of the linear tear-off notch is consistent with the linear tearing direction of the linear tear-off nylon layer.

[0018] In one embodiment, the internal accommodation space of the protruding rectangular portion on the upper portion of the bag body is in the shape of a right cone.

[0019] Compared with the prior art, the high-barrier, easy-to-tear, visible composite film for beer packaging provided by the utility model has a film structure including a heat-sealable, biaxially oriented nylon film made of a heat-sealable heat-sealing layer, which is sufficient to meet the sealing requirements of packaging production and avoids the introduction of materials such as PP or PE.

[0020] Compared with the existing technology, the high-barrier, easy-to-tear, visible composite film for beer packaging provided by the utility model includes a linear easy-to-tear nylon layer prepared by PA / MXD6 or PA / long carbon chain nylon through biaxial stretching technology in the film layer structure. It has the characteristics of linear easy tearing, which can provide convenience for consumers to open the package and avoid problems such as poor experience or spillage of contents due to difficulty in tearing.

[0021] Compared with the prior art, the high-barrier, easy-to-tear, visible composite film for beer packaging provided by the utility model includes a PVA barrier layer in the film layer structure, and is particularly obtained by directly coating a water-resistant modified PVA coating on the surface of a straight, easy-to-tear nylon layer online. The water-resistant modified PVA coating is a transparent, visible, environmentally friendly material with good barrier properties, which can well protect the freshness and taste of beer. It can replace traditional aluminum foil or aluminized materials as barrier materials, avoid the loss of transparency, and can achieve the effect of visualizing the packaging contents when made into beer packaging.

[0022] Compared with the existing technology, the high-barrier, easy-to-tear, visible composite film for beer packaging provided by the utility model includes a toughened and wear-resistant nylon layer in the film layer structure, specifically a biaxially oriented nylon film made of nano-modified toughened nylon, which has good mechanical properties and can provide good mechanical protection during transportation and storage.

[0023] Compared with the prior art, the beer packaging self-supporting bag provided by the present invention includes a bag body and a bag bottom, and is made of a high-barrier, easy-to-tear, visible composite film for beer packaging. The peripheral edge is heat-sealed to form a bag structure with an accommodating cavity; the bag bottom is clamped on the inner side of the lower part of the bag body. When the bag bottom is folded along the center line of the bag bottom film, the bag bottom can be hidden inside the bag body. When the bag bottom is unfolded along the center line of the bag bottom film, the lower part of the bag body can be propped open to form a self-supporting structure, thereby preventing the contents from spilling due to the tipping of the bag body.

[0024] Compared with the prior art, the beer packaging stand-up bag provided by the utility model is further provided with a filter membrane inside the bag body, which can effectively filter beer foam during beer filling and increase the beer filling capacity.

[0025] Compared with the prior art, the beer packaging self-supporting bag provided by the utility model is provided with a straight tear-off opening and a tear-off straight line on the upper part of the bag body. The straight tear-off opening is consistent with the straight tearing direction of the straight tear-off nylon layer, and the tear-off straight line coincides with the straight tearing direction of the straight tear-off nylon layer. When torn, the opening is easy to tear and the opening is smooth, which makes it convenient for consumers to open the package easily and prevents the contents from spilling when opening. It also replaces the plastic mouth structure and reduces the packaging cost.

[0026] Other features and beneficial effects of the present invention will be described in the following description, and some of the technical features and beneficial effects can be obviously derived from the description or understood by implementing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 Schematic diagram of the structure of the high-barrier, easy-to-tear, visible composite film for beer packaging provided in Example 1 of the present utility model;

[0029] Figure 2 This is a front view of a stand-up bag for beer packaging provided in Example 2 of the present utility model;

[0030] Figure 3 This is a left side view of the stand-up bag for beer packaging provided in Example 2 of the present invention.

[0031] Reference numerals:

[0032] DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0034] In the description of this utility model, it should be noted that the terms "upper," "lower," "upper," "lower," "inner," "outer," "inner side," and "outer side" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Example 1

[0036] The utility model embodiment provides a high barrier easy-tear visible composite film for beer packaging, Figure 1 As shown, the film layer structure includes a heat sealing layer 101, a first adhesive layer 102, a linear easy-tear nylon layer 103, a PVA barrier layer 104, a second adhesive layer 105 and a toughened wear-resistant nylon layer 106 arranged in sequence from bottom to top.

[0037] In this embodiment, further, the heat-sealing layer 101 is a heat-sealable biaxially oriented nylon film with a thickness of 15 to 30 μm;

[0038] When used specifically, the heat-sealable biaxially oriented nylon film provides good heat-sealability, meets the sealing requirements of packaging bag production, and avoids the introduction of materials such as PP or PE.

[0039] In this embodiment, further, the linear easy-tear nylon layer 103 is prepared by biaxial stretching technology of PA / MXD6 or PA / long carbon chain nylon, and has a thickness of 15-30 μm;

[0040] During specific use, the linear easy-tear nylon layer 103 has good stiffness. At the same time, due to its linear easy-tear property, it can provide convenience for consumers to open the package, avoiding problems such as poor experience or spillage of contents due to difficulty in tearing.

[0041] In this embodiment, further, the PVA barrier layer 104 is a water-resistant modified PVA coating, which is directly coated on the surface of the linear easy-tear nylon layer 103 by online coating, and the coating thickness is 0.3-1 μm;

[0042] When used specifically, the water-resistant modified PVA coating is a transparent, visible, environmentally friendly material with good barrier properties. It can well protect the freshness and taste of beer, and avoids the loss of transparency caused by using traditional aluminum foil or aluminized materials as barrier materials. The beer packaging made of it can achieve the effect of visualizing the packaging contents.

[0043] In this embodiment, further, the toughened wear-resistant nylon layer 106 is a biaxially oriented nylon film made of nano-modified toughened nylon, with a thickness of 15 to 30 μm;

[0044] In specific use, the toughened wear-resistant nylon layer 106 is the uppermost structure of the composite film, and is the outermost structure of the packaging bag when made into the packaging bag, which can provide good mechanical protection for the entire packaging bag during transportation and storage.

[0045] In this embodiment, further, the first adhesive layer 102 and the second adhesive layer 105 are both made of polyurethane glue or acrylic glue, and have a thickness of 1-2 μm.

[0046] In this embodiment, preferably, the thickness of the heat sealing layer 101 is 30 μm.

[0047] In this embodiment, preferably, the linear easy-tear nylon layer 103 is prepared from PA / long carbon chain nylon by biaxial stretching technology, and has a thickness of 15 μm.

[0048] In this embodiment, preferably, the PVA barrier layer 104 has a thickness of 0.5 μm.

[0049] In this embodiment, preferably, the toughened and wear-resistant nylon layer 106 has a thickness of 15 μm.

[0050] In this embodiment, preferably, the first adhesive layer 102 and the second adhesive layer 105 are both made of polyurethane glue, and the thickness of each is 1.5 μm.

[0051] In this embodiment, a water-resistant modified PVA coating is specifically used to directly coat the surface of the linear easy-tear nylon layer as a barrier layer of the composite film for beer packaging, replacing the aluminum foil or aluminized material barrier layer in traditional flexible packaging film materials. While ensuring good barrier properties, it also obtains the advantages of linear easy tearing and transparent visibility. Then, the toughened wear-resistant nylon layer and the heat-sealing layer are bonded to the upper and lower sides respectively through the first adhesive layer and the second adhesive layer to obtain a high-barrier, easy-tear, visible composite film for beer packaging.

[0052] Example 2

[0053] The utility model also provides a beer packaging self-supporting bag, Figure 2 、 Figure 3 As shown, the bag body 100 and the bag bottom 200 are made of the high-barrier, easy-to-tear, visible composite film for beer packaging described in Example 1;

[0054] The bag body 100 includes a first bag body side surface 110 and a second bag body side surface 120, both of which have a convex rectangular "convex" film on the upper portion;

[0055] The bag bottom 200 is clamped between the first side surface 110 and the second side surface 120 of the bag body, and is heat-sealed with the first side surface 110 and the second side surface 120 of the bag body at the periphery to form a heat-sealed edge 310, an opening section 320 and a receiving cavity 400;

[0056] The opening section 320 is the entire or partial top edge section of the rectangular protruding portion of the bag body 100 that is not heat-sealed;

[0057] The bag bottom 200 is provided with a bag bottom film midline 210, wherein when the bag bottom 200 is folded along the bag bottom film midline 210, the bag bottom 200 can be hidden inside the bag body 100, wherein when the bag bottom 200 is unfolded along the bag bottom film midline 210, the lower part of the first side surface 110 and the second side surface 120 of the bag body can be stretched open to form a self-supporting bag structure;

[0058] For specific use, refer to Figure 3 As shown, the self-standing structure of the bag body is combined with the high-barrier, easy-to-tear, visible composite film for beer packaging, which has good stiffness. It can make the beer packaging self-standing bag have a good standing effect without adding materials, preventing the contents from tipping over and spilling.

[0059] In this embodiment, a filter membrane 500 is further included, which is fixed to the upper inner portion of the bag body 100 by heat sealing at the periphery, dividing the accommodating cavity 400 into an upper cavity 410 and a lower cavity 420 for filtering beer foam.

[0060] Specifically, when beer is filled, the filter membrane 500 is used to effectively filter the beer foam, thereby preventing the beer bubbles generated during the filling process from occupying the accommodating volume and causing the beer filling amount to be small or insufficient.

[0061] In this embodiment, the upper protruding rectangular portion of the bag body 100 is further provided with a straight tearing opening 131 and a straight tearing line 132. The opening direction of the straight tearing opening 131 is consistent with the straight tearing direction of the straight tearing nylon layer 103. The straight tearing line 132 coincides with the straight tearing direction of the straight tearing nylon layer 103.

[0062] During specific use, the seal of the beer packaging self-supporting bag can be easily torn open along the straight line easy-tear opening 131, and the opening is flush and regular, which not only makes it convenient for consumers to open the package easily and prevents the contents from spilling when opening, but also reduces the packaging cost by replacing the plastic mouth structure design.

[0063] In this embodiment, further, the internal accommodation space of the upper protruding rectangular portion of the bag body 100 is a positive cone;

[0064] When beer is specifically filled, the positive cone structure with a small top and a large bottom can simultaneously achieve the effect of the filling port fitting the filling tube and smooth filling.

[0065] In this embodiment, by adopting the high-barrier, easy-to-tear, visible composite film for beer packaging provided by Example 1 of the utility model to make a self-supporting bag for beer packaging, the self-supporting bag for beer packaging has high barrier properties, can effectively block water vapor, oxygen and carbon dioxide, ensure the freshness and taste of beer, and at the same time has the characteristics of being easy to tear in a straight line and transparent and visible, and can directly observe the color and hops of the beer in the bag. It is light and flat when opened, and the contents are not easy to spill. The self-supporting structure design based on the bottom of the bag, combined with the composite film material with good stiffness, can achieve a simple and good standing effect of the self-supporting bag packaging, and avoid spilling the contents during use. In addition, the specially designed filter membrane structure inside the beer packaging self-supporting bag can filter beer bubbles when filling beer, thereby increasing the beer filling capacity.

[0066] Although terms such as high barrier, easy to tear, visual, and self-supporting are frequently used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-barrier, easy-tear, visible composite film for beer packaging, characterized by: The film layer structure comprises a heat-sealing layer (101), a first adhesive layer (102), a linear easy-tear nylon layer (103), a PVA barrier layer (104), a second adhesive layer (105) and a toughened wear-resistant nylon layer (106) which are arranged in sequence from bottom to top.

2. The high-barrier, easily-tearable, visible composite film for beer packaging according to claim 1, characterized in that: The heat-sealing layer (101) is a heat-sealable biaxially oriented nylon film with a thickness of 15 to 30 μm.

3. The high-barrier, easily-tearable, visible composite film for beer packaging according to claim 1, characterized in that: The linear easy-tear nylon layer (103) is prepared from PA / MXD6 or PA / long carbon chain nylon by biaxial stretching technology, and has a thickness of 15-30 μm.

4. The high-barrier, easily-tearable, visible composite film for beer packaging according to claim 1, characterized in that: The PVA barrier layer (104) is a water-resistant modified PVA coating, which is directly coated on the surface of the linear easy-tear nylon layer (103) by online coating, and the coating thickness is 0.3-1 μm.

5. The high-barrier, easily-tearable, visible composite film for beer packaging according to claim 1, characterized in that: The toughened and wear-resistant nylon layer (106) is a biaxially stretched nylon film made of nano-modified toughened nylon, and has a thickness of 15 to 30 μm.

6. The high-barrier, easily-tearable, visible composite film for beer packaging according to claim 1, characterized in that: The first adhesive layer (102) and the second adhesive layer (105) are both made of polyurethane glue or acrylic glue, and both have a thickness of 1-2 μm.

7. A beer packaging stand-up bag, characterized in that: include: The bag body (100) and the bag bottom (200) are made of the high-barrier, easy-to-tear, visible composite film for beer packaging according to any one of claims 1 to 6; The bag body (100) comprises a first bag body side surface (110) and a second bag body side surface (120), both of which have a convex rectangular film on the upper portion; The bag bottom (200) is clamped between the first side surface (110) and the second side surface (120) of the bag body, and is heat-sealed with the first side surface (110) and the second side surface (120) of the bag body at the periphery to form a heat-sealed edge (310), an opening section (320) and a receiving cavity (400); The opening section (320) is obtained by not subjecting the entire or partial top edge section of the protruding rectangular portion of the bag body (100) to heat sealing treatment; The bag bottom (200) is provided with a bag bottom film midline (210), wherein when the bag bottom (200) is folded along the bag bottom film midline (210), the bag bottom (200) can be hidden inside the bag body (100), wherein when the bag bottom (200) is unfolded along the bag bottom film midline (210), the lower part of the first side surface (110) and the second side surface (120) of the bag body can be stretched open to form a self-supporting structure of the bag body.

8. The beer packaging stand-up bag according to claim 7, characterized in that: Also includes: The filter membrane (500) is fixed to the upper inner portion of the bag body (100) by heat sealing at the periphery, dividing the accommodating cavity (400) into an upper cavity (410) and a lower cavity (420), and is used for filtering beer foam.

9. The beer packaging stand-up pouch according to claim 7, characterized in that: The protruding rectangular portion on the upper portion of the bag body (100) is provided with a straight tearing opening (131) and a straight tearing line (132); the opening direction of the straight tearing opening (131) is consistent with the straight tearing direction of the straight tearing nylon layer (103); and the straight tearing line (132) coincides with the straight tearing direction of the straight tearing nylon layer (103).

10. The beer packaging stand-up pouch according to claim 7, characterized in that: The internal accommodation space of the protruding rectangular portion on the upper part of the bag body (100) is in the shape of a positive cone.

Images