Fresh-locking easy-to-tear beer packaging composite film and packaging bag

Abstract

The utility model relates to the technical field of packaging materials, in particular to a fresh-locking easy-to-tear beer packaging composite film and a packaging bag. Wherein the composite film sequentially comprises a printing layer, an easy-to-tear barrier layer and a heat sealing layer from outside to inside, the easy-to-tear barrier layer and the heat sealing layer are connected through a polyurethane adhesive layer, and the easy-to-tear barrier layer is a five-layer co-extrusion two-way stretching high-barrier linear easy-to-tear nylon film. The thickness of the printing layer is 1.0-2.0 microns, the thickness of the easy-to-tear barrier layer is 15-25 microns, the heat sealing layer is a polyethylene or polypropylene film layer, the thickness of the heat sealing layer is 30-80 microns, and the thickness of the polyurethane adhesive layer is 1.0-4.0 microns. The packaging bag is formed by heat sealing of the composite film, an easy-to-tear notch is formed in the edge of a bag body, and the direction of the easy-to-tear notch is consistent with the tearing direction of the easy-to-tear barrier layer. The composite film and the packaging bag have good oxygen barrier property, and the taste enjoying period of beer can be prolonged; the biaxially oriented polyamide film is puncture-resistant, so that bag explosion loss can be reduced; beer leakage can be reduced due to linear easy tearing, and the use experience of customers is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of packaging material, especially to a composite film for fresh-keeping and easy-to-tear beer packaging and a packaging bag. BACKGROUND

[0002] Beer, as a popular beverage, is made of barley malt, hops and water as main raw materials, and is fermented by yeast, rich in carbon dioxide and low in alcohol concentration. Moderate beer consumption is beneficial to health. At present, common beer packaging methods include bottling, barreling and filling. With the development of the beer industry, bagged bulk beer has gradually gained market favor due to its low packaging cost, portability and suitability for large-capacity packaging.

[0003] However, beer is prone to lose freshness during storage. The main reason is that oxygen will react with phenolic substances in beer, causing beer to appear liquid turbidity, color deepening, and loss of unique aroma, greatly shortening the beer's tasting period. Ordinary packaging bags cannot meet the packaging needs of beer. To solve this problem, the market often uses a method of vacuumizing the inner bag of beer to create an oxygen barrier environment. However, this beer packaging bag usually needs to be designed with a pipe valve to facilitate drinking, which undoubtedly increases the production cost.

[0004] Therefore, how to develop a packaging film with good oxygen barrier property, which can effectively reduce the reaction of oxygen with beer flavor substances and prolong the beer tasting period, and also improve the convenience of beer packaging bag use through reasonable design of easy-to-tear notches, enhance customer experience, has become a problem to be solved in the field. SUMMARY

[0005] To solve the problems of the prior art mentioned in the background, the present application provides a composite film for fresh-keeping and easy-to-tear beer packaging, which comprises a printing layer, an easy-to-tear barrier layer and a heat-sealing layer arranged in order from the outside, wherein the easy-to-tear barrier layer and the heat-sealing layer are fixedly connected to each other by a polyurethane adhesive layer; the printing layer is arranged on the side of the easy-to-tear barrier layer away from the heat-sealing layer by printing.

[0006] The easy-to-tear barrier layer is a five-layer co-extrusion biaxial stretching high-barrier straight-line easy-to-tear nylon film, which comprises a polyamide upper surface layer, a first easy-to-tear layer, a barrier core layer, a second easy-to-tear layer and a polyamide lower surface layer.

[0007] On the basis of the above-mentioned scheme, further, the thickness of the printing layer is 1.0-2.0 μm.

[0008] On the basis of the above scheme, further, the thickness of the easy-to-tear barrier layer is 15-25 mu m;The material of the barrier core layer is polyamide resin MXD6;The material of the first easy-to-tear layer and the second easy-to-tear layer is polyamide composite material.

[0009] On the basis of the above scheme, further, the heat-sealing layer is a polyethylene film layer or a polypropylene film layer.

[0010] On the basis of the above scheme, further, the thickness of the heat-sealing layer is 30-80 mu m.

[0011] On the basis of the above scheme, further, the thickness of the polyurethane adhesive layer is 1.0-4.0 mu m.

[0012] On the basis of the above scheme, further, the polyamide upper layer and the polyamide lower layer of the easy-to-tear barrier layer are each provided with at least one corona surface, and the corona value is greater than 50 dyn.

[0013] The application also provides a packaging bag formed by heat-sealing the fresh-keeping easy-to-tear beer packaging composite film as described above, and the packaging bag is sequentially provided with the printing layer, the easy-to-tear barrier layer and the heat-sealing layer from the outside to the inside.

[0014] On the basis of the above scheme, further, the edge of the bag body of the packaging bag is provided with an easy-to-tear notch, and the direction of the easy-to-tear notch is consistent with the easy-to-tear direction of the easy-to-tear barrier layer.

[0015] On the basis of the above scheme, further, the edge of the bag body of the packaging bag is provided with a handle.

[0016] Compared with the prior art, the fresh-keeping easy-to-tear beer packaging composite film has the following beneficial effects:

[0017] The beer packaging bag made of the fresh-keeping easy-to-tear beer packaging composite film has good oxygen barrier property, which can avoid the loss of carbon dioxide or flavor in beer to a certain extent, prolong the enjoyment period of beer, and the biaxially oriented polyamide film has good puncture resistance, can effectively reduce the loss caused by puncture and explosion of the bag, and the linear easy-to-tear property can also reduce the beer leakage problem caused by the crack, and improve the customer experience.

[0018] The other features and advantages of the present application will be described in the following description and become apparent from the description, the drawings and the claims, and it is understood that the features and advantages of the present application can be obtained by any combination of the claimed structures as specified in the appended claims. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0020] Figure 1 The layer structure diagram of the composite film for fresh-keeping and easy-to-tear beer packaging provided for the present application embodiment 1 is shown in the figure.

[0021] Figure 2 The structure schematic diagram of the packaging bag made of the composite film for fresh-keeping and easy-to-tear beer packaging provided for the present application embodiment 2 is shown in the figure.

[0022] The figure mark: 10-printing layer, 20-easy-to-tear barrier layer, 30-polyurethane adhesive layer, 40-heat-seal layer, 21-polyamide upper surface layer, 22-first easy-to-tear layer, 23-barrier core layer, 24-second easy-to-tear layer, 25-polyamide lower surface layer; A-composite film bag body, B-easy-to-tear notch, C-handle DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present application embodiments more clear, the following will combine the drawings in the present application embodiments to clearly and completely describe the technical scheme in the present application embodiments. Obviously, the described embodiments are some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0024] In the description of the utility model, it is necessary to explain that the orientation or position relation of the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model, and the "inner" refers to the side in contact with the packaging content, and the "outer" refers to the side in contact with the external environment. The remaining components in the following examples can be obtained from the market or prepared by the prior art if not otherwise specified.

[0025] The utility model provides the following lock fresh easy to tear beer packaging composite membrane embodiment:

[0026] As Figure 1 Indicated, the utility model provides a kind of lock fresh easy to tear beer packaging composite membrane, the composite membrane includes that printing layer 10, easy to tear barrier layer 20 and heat-sealing layer 40 are sequentially arranged from outside to inside, wherein easy to tear barrier layer 20 and heat-sealing layer 40 are mutually bonded and fixed by polyurethane adhesive layer 30;The printing layer 10 is arranged on the side surface of the easy to tear barrier layer 20 away from the heat-sealing layer 40 by printing mode;

[0027] Wherein, the easy to tear barrier layer 20 is five-layer co-extrusion biaxial stretching high-barrier straight easy-to-tear nylon film, sequentially arranged as polyamide upper surface layer 21, first easy-to-tear layer 22, barrier core layer 23, second easy-to-tear layer 24 and polyamide lower surface layer 25.

[0028] Wherein, in preferred scheme, the thickness of the printing layer 10 is 1.0-2.0 μm, the thickness of the easy to tear barrier layer 20 is 15-25 μm, the thickness of the heat-sealing layer 40 is 30-80 μm, and the thickness of the polyurethane adhesive layer 30 is 1.0-4.0 μm.

[0029] Wherein, in the easy to tear barrier layer 20, the thickness of polyamide upper surface layer 21 and polyamide lower surface layer 25 is 2-5 μm, the thickness of first easy-to-tear layer 22 and second easy-to-tear layer 24 is 3-10 μm;The thickness of barrier core layer is 5-10 μm.

[0030] Embodiment 1

[0031] In the lock fresh easy to tear beer packaging composite membrane embodiment 1 provided by the utility model:

[0032] The thickness of the printing layer is 2.0 microns, and the water-based ink disclosed in the publication No. CN100434487C "Food indirect contact water-based plastic ink and its preparation method" is used for printing, which is safe and non-toxic, used for outer layer printing, no direct contact with food, green and environmentally friendly, can meet the printing requirements of beer and beverage and other needs and food indirect contact packaging, and conforms to the food safety indirect contact standard.

[0033] The thickness of the easy-to-tear barrier layer 20 is 15 microns, the thickness of the polyamide upper surface layer 21 and the polyamide lower surface layer 25 of the easy-to-tear barrier layer 20 is 2 microns, and the existing PA6 material on the market can be used for preparation, and the two surfaces of the polyamide upper surface layer 21 and the polyamide lower surface layer 25 are provided with a corona surface, and the corona value is greater than 50 dyn.

[0034] The thickness of the barrier core layer is 5 microns, and the existing MXD6 material on the market can be used for preparation, and the thickness of the first easy-to-tear layer 22 and the second easy-to-tear layer 24 is 3 microns, and the polyamide composite material in the publication No. CN105778488B "A straight-line easy-to-tear polyamide film and a preparation method thereof" can be used.

[0035] In the embodiment, the first tear layer 22 and the second tear layer 24 are provided to give the film good straight-line tearing performance, the barrier core layer 23 is provided to make the film have good barrier property and aroma retention, and the cooperation of the upper surface layer 21, the first easy-to-tear layer 22, the barrier core layer 23, the second easy-to-tear layer 24 and the lower surface layer 25 makes the film have good mechanical property, barrier property and straight-line tearing performance, can effectively prevent oxygen from reacting with the substances in beer, ensure the freshness of beer, and meet the packaging requirements of beer.

[0036] More preferably, the thickness of the heat-sealing layer 40 is 60 microns, and the existing polyethylene or polypropylene material can be used for preparation, and the polypropylene in the publication No. CN106633413B "Polypropylene composition, preparation method and application thereof" is used in the embodiment, which has the advantages of low thermal conductivity, fast heat-sealing speed and strong mechanical property.

[0037] The thickness of the polyurethane adhesive layer 30 is 1.0 microns, and the existing two-component polyurethane adhesive can be used for preparation, and the WD8118A / B solvent-free two-component polyurethane adhesive of Shanghai Kenda New Material Co., Ltd. is used in the embodiment, which does not contain organic solvents, is non-toxic and non-polluting, and has high adhesive strength.

[0038] The composite film for fresh-keeping and easy-to-tear beer packaging has a composite structure, can utilize the advantages of each layer of film, and meet various performance requirements of beer packaging bags.

[0039] The innermost heat-sealing layer 40 is a polyethylene film layer or a polypropylene film layer, which can endow the film with good heat-sealing strength. The outer side of the heat-sealing layer 40 is provided with the easy-tear barrier layer 20, and the arrangement of the first easy-tear layer 22 and the second easy-tear layer 24 in the easy-tear barrier layer 20 endows the film with good straight-line tearing performance, and the arrangement of the barrier core layer 23 makes the film have good barrier property and aroma retention property. Finally, the printing layer 10 is used in the outermost layer to improve the printable function of the composite film, so as to meet the application requirements of printing various patterns and characters on the bag.

[0040] Embodiment 2

[0041] The utility model also provides a packaging bag as shown in the utility model discloses a packaging bag: the bag body of packaging bag adopts the composite film for beer packaging of fresh-keeping easy tearing in embodiment 1, namely composite film bag body A. Figure 2

[0042] In order to verify the effect of the composite film for beer packaging of fresh-keeping easy tearing, the utility model also provides the following verification experiment.

[0043] The composite film of embodiment 1 is tested for relevant performance, and the specific result data is shown in table 1 as follows:

[0044] Table 1 performance test of the composite film of embodiment 1

[0045]

[0046] From the results in table 1 above, it can be seen that the composite film for beer packaging of fresh-keeping easy tearing provided by the utility model has good mechanical properties, straight-line easy-tearing property and barrier property, and the beer packaging bag made by heat sealing also has certain drop resistance.

[0047] In summary, the composite film for beer packaging of fresh-keeping easy tearing adopted by the application has a composite structure, can utilize the advantages of each film layer, meet various performance requirements of beer packaging bags, and the beer bag prepared by using the composite film for beer packaging of fresh-keeping easy tearing has good oxygen barrier property, can avoid the loss of carbon dioxide or flavor in beer to a certain extent, prolong the enjoyment period of beer, the biaxially oriented polyamide film has good puncture resistance, can effectively reduce the loss caused by puncture and bag explosion, and the straight-line easy-tearing property can also reduce the problem of beer leakage caused by cracks, and improve the customer experience.

[0048] ​Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A composite film for fresh-keeping and easy-tearing beer packaging, characterized by: The composite film comprises a printing layer (10), a tearable barrier layer (20) and a heat-seal layer (40) arranged in sequence from outside to inside; The tearable barrier layer (20) and the heat-seal layer (40) are adhered and fixed to each other through a polyurethane adhesive layer (30); the printing layer (10) is arranged on the side of the tearable barrier layer (20) away from the heat-seal layer (40) by printing; The tearable barrier layer (20) is a five-layer co-extrusion biaxially-stretched high-barrier straight-line tearable nylon film, which comprises a polyamide upper surface layer (21), a first tearable layer (22), a barrier core layer (23), a second tearable layer (24) and a polyamide lower surface layer (25) arranged in sequence.

2. The fresh keeping easy tear beer packaging composite film according to claim 1, characterized in that: The thickness of the printing layer (10) is 1.0-2.0 μm.

3. The fresh keeping easy tear beer packaging composite film according to claim 1, characterized in that: The thickness of the tearable barrier layer (20) is 15-25 μm; the material of the barrier core layer (23) is polyamide resin; the materials of the first tearable layer (22) and the second tearable layer (24) are polyamide composite materials.

4. The fresh keeping easy tear beer packaging composite film according to claim 1, characterized in that: The heat-seal layer (40) is a polyethylene film layer or a polypropylene film layer.

5. The fresh keeping easy tear beer packaging composite film according to claim 4, characterized in that: The thickness of the heat-seal layer (40) is 30-80 μm.

6. The fresh keeping easy tear beer packaging composite film according to claim 1, characterized in that: The thickness of the polyurethane adhesive layer (30) is 1.0-4.0 μm.

7. The fresh keeping easy tear beer packaging composite film according to claim 1, characterized in that: The polyamide upper surface layer (21) and the polyamide lower surface layer (25) of the tearable barrier layer (20) are each provided with at least one corona surface, and the corona value is >50 dyn.

8. A package, characterized by: The packaging bag is formed by heat-sealing the fresh-keeping tearable composite film for beer packaging according to any one of claims 1-7, and the bag body of the packaging bag comprises the printing layer (10), the tearable barrier layer (20) and the heat-seal layer (40) arranged in sequence from outside to inside.

9. The bag of claim 8, wherein: The edge of the bag body of the packaging bag is provided with a tearable notch, and the direction of the tearable notch is consistent with the tearable direction of the tearable barrier layer (20).

10. The bag of claim 8, wherein: The edge of the bag body of the packaging bag is provided with a handle.

Images