Food-grade packaging PE film with waterproof function

Abstract

The utility model relates to a food-grade packaging PE (polyethylene) film with a waterproof function, which belongs to the technical field of packaging films and comprises a base film layer, a waterproof mechanism is adhered to one side of the base film layer through epoxy glue, and a PE film is formed between the base film layer and the waterproof mechanism through hot pressing. The waterproof mechanism comprises a waterproof layer, a tensile layer, a high-temperature-resistant layer and a heat preservation layer. One side of the waterproof layer is adhered to one side of the base film layer through epoxy glue, and one side, far away from the base film layer, of the waterproof layer is adhered to one side of the tensile layer through epoxy glue. The food-grade packaging PE film with the waterproof function can effectively prevent moisture permeation, keep food dry and fresh, can effectively resist high temperature and chemical corrosion, ensures the stability and durability of a packaging material, has an anti-pulling function, can bear a certain tensile force, is not easy to break, and has a waterproof function. Therefore, the waterproof and anti-pulling effects of the existing PE film are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging films, in particular to a food-grade packaging PE film with a waterproof function. Background Art

[0002] PE film, that is, polyethylene layer film, is a film made of polyvinyl chloride, polyethylene layer, polypropylene layer, polystyrene layer and other resins. It is used for packaging and as a coating layer. Plastic packaging and plastic packaging products occupy an increasingly larger share in the market, especially composite plastic flexible packaging, which has been widely used in food, medicine, chemical industry and other fields. Among them, food packaging accounts for the largest proportion, such as beverage packaging, quick-frozen food packaging, steamed food packaging, fast food packaging, etc. These products have brought great convenience to people's lives.

[0003] PE film is one of the indispensable raw materials in our industrial and social life. Plastic film can be processed into various packaging films in industry. As the quality requirements of packaging films are getting higher and higher, ordinary packaging films often have only one layer of waterproof measures, which makes their waterproof performance poor, resulting in the phenomenon of water permeability inside the packaging film. In addition, the existing PE packaging film does not have a strengthening mechanism, resulting in low strength and is easily torn by slight external forces, resulting in subsequent unusability, resulting in the need to improve the waterproof and anti-tear effect of the existing PE film. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a food-grade packaging PE film with waterproof function, which has the advantages of being able to effectively improve the waterproof and tear-resistant effects of the existing PE film, and solves the problem of poor waterproof and tear-resistant effects of the existing PE film.

[0005] In order to achieve the above-mentioned purpose of effectively improving the waterproof and tear-resistant effect of the existing PE film, the utility model provides the following technical solutions: a food-grade packaging PE film with waterproof function, comprising a base film layer, a waterproof mechanism is bonded to one side of the base film layer by epoxy adhesive, and a PE film is formed between the base film layer and the waterproof mechanism by hot pressing;

[0006] The waterproof mechanism includes a waterproof layer, a tensile layer, a high temperature resistant layer and a thermal insulation layer; one side of the waterproof layer is bonded to one side of the base membrane layer by epoxy glue, the side of the waterproof layer away from the base membrane layer is bonded to one side of the tensile layer by epoxy glue, the side of the tensile layer away from the waterproof layer is bonded to one side of the high temperature resistant layer by epoxy glue, and the side of the high temperature resistant layer away from the tensile layer is bonded to one side of the thermal insulation layer by epoxy glue.

[0007] Furthermore, the base film layer consists of a polyethylene layer and a polypropylene layer.

[0008] Furthermore, the sum of the thicknesses of the base membrane layer and the waterproof mechanism is 0.02 mm to 0.05 mm, and the widths of the base membrane layer and the waterproof mechanism are both 5-10 mm and the lengths are both 30-50 mm.

[0009] Furthermore, the waterproof layer includes a palmitic acid layer, a polyurethane waterproof coating layer and an acrylic emulsion layer; the palmitic acid layer, the polyurethane waterproof coating layer and the acrylic emulsion layer are all bonded together by epoxy adhesive.

[0010] Furthermore, the tensile layer includes polyester fiber and Lycra fiber; the polyester fiber and the Lycra fiber are bonded together by epoxy adhesive.

[0011] Furthermore, the high temperature resistant layer includes a polyamide layer, a silicon carbide coating and an aluminum tripolyphosphate coating; the polyamide layer, the silicon carbide coating and the aluminum tripolyphosphate coating are bonded together by epoxy adhesive.

[0012] Furthermore, the thermal insulation layer comprises a polyurethane layer, a phenolic foam layer and a polystyrene layer; the polyurethane layer, the phenolic foam layer and the polystyrene layer are all bonded together by epoxy adhesive. Beneficial Effects

[0013] Compared with the prior art, the utility model provides a food-grade packaging PE film with waterproof function, which has the following beneficial effects:

[0014] The food-grade packaging PE film with waterproof function can effectively prevent water penetration and keep food dry and fresh through the mutual cooperation of the waterproof mechanisms on the base film layer. It can also effectively resist high temperature and chemical corrosion to ensure the stability and durability of the packaging material. In addition, it has an anti-tearing function, can withstand a certain tensile force, is not easy to break, and ensures the integrity of the food packaging, thereby effectively improving the waterproof and anti-tearing effect of the existing PE film. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 for Figure 1 A three-dimensional cross-sectional schematic diagram of the polyethylene layer connection structure;

[0017] Figure 3 for Figure 1 A three-dimensional cross-sectional schematic diagram of the connection structure of the polyurethane waterproof coating layer;

[0018] Figure 4 for Figure 1A schematic diagram of a three-dimensional cross-section of the connection structure of the aluminum tripolyphosphate coating;

[0019] Figure 5 for Figure 1 Schematic diagram of the three-dimensional cross-section of the polystyrene layer connection structure.

[0020] In the figure: 100 base membrane layer, 101 polyethylene layer, 102 polypropylene layer, 200 waterproof structure, 2011 palmitic acid layer, 2012 polyurethane waterproof coating layer, 2013 acrylic emulsion layer, 2021 polyester fiber layer, 2022 Lycra fiber layer, 2031 polyamide layer, 2032 silicon carbide coating, 2033 aluminum tripolyphosphate coating, 2041 polyurethane layer, 2042 phenolic foam layer, 2043 polystyrene layer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5 The utility model provides a technical solution: a food-grade packaging PE film with waterproof function, comprising a base film layer 100, a waterproof mechanism 200 is bonded to one side of the base film layer 100 by epoxy adhesive, and a PE film is formed between the base film layer 100 and the waterproof mechanism 200 by hot pressing;

[0023] Through the mutual cooperation of the waterproof mechanism 200 on the base film layer 100, it is possible to effectively prevent moisture penetration and keep the food dry and fresh. At the same time, it can also effectively resist high temperature and chemical corrosion, ensure the stability and durability of the packaging material, and also has an anti-tearing function, can withstand a certain tensile force, is not easy to break, and ensures the integrity of the food packaging, thereby effectively improving the waterproof and anti-tearing effect of the existing PE film.

[0024] It should be noted that the base film layer 100 is composed of a polyethylene layer 101 and a polypropylene layer 102. The polyethylene layer 101 is not easily broken, ensuring the integrity of the food packaging, and the polypropylene layer 102 has a reinforcing effect and can increase the tensile resistance of the PE film.

[0025] It is understood that the sum of the thickness of the base film layer 100 and the waterproof mechanism 200 is 0.02mm to 0.05mm, the width of the base film layer 100 and the waterproof mechanism 200 are both 5-10mm and the length is 30-50mm, and the multi-layer structure is adopted, which can effectively improve the waterproof and anti-pulling performance of the PE film and ensure the quality and effect of food packaging. At the same time, the materials used are all food-grade materials, safe and non-toxic, meet hygiene standards, and can ensure the safety of food.

[0026] In this embodiment, the waterproof mechanism 200 is a structure used to prevent water penetration, resist high temperature and chemical corrosion, and withstand a certain tensile force.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the waterproof mechanism 200 includes a waterproof layer, a tensile layer, a high temperature resistant layer and a thermal insulation layer; one side of the waterproof layer is bonded to one side of the base membrane layer 100 by epoxy glue, the side of the waterproof layer away from the base membrane layer 100 is bonded to one side of the tensile layer by epoxy glue, the side of the tensile layer away from the waterproof layer is bonded to one side of the high temperature resistant layer by epoxy glue, and the side of the high temperature resistant layer away from the tensile layer is bonded to one side of the thermal insulation layer by epoxy glue.

[0028] In addition, the waterproof layer includes a palmitic acid layer 2011, a polyurethane waterproof coating layer 2012 and an acrylic emulsion layer 2013; the palmitic acid layer 2011, the polyurethane waterproof coating layer 2012 and the acrylic emulsion layer 2013 are bonded together by epoxy adhesive to make them have the characteristics of high strength, large elongation, good water resistance, etc., which can effectively prevent moisture from penetrating into the package and maintain the freshness and taste of the food.

[0029] In this embodiment, the tensile layer includes a polyester fiber layer 2021 and a Lycra fiber layer 2022; the polyester fiber layer 2021 and the Lycra fiber layer 2022 are bonded together by epoxy adhesive to make them have high strength and durability, be able to withstand a certain tensile force, and not be easily broken. This structure can ensure the integrity of food packaging during transportation and storage, and prevent food from being affected by external factors and deteriorating.

[0030] It should also be noted that the high temperature resistant layer includes a polyamide layer 2031, a silicon carbide coating 2032 and an aluminum tripolyphosphate coating 2033; the polyamide layer 2031, the silicon carbide coating 2032 and the aluminum tripolyphosphate coating 2033 are bonded together by epoxy adhesive in order to make them have higher high temperature resistance, maintain the integrity and stability of the packaging in a high temperature environment, and prevent the food from being affected by high temperature and deteriorating.

[0031] It should be further explained that the insulation layer includes a polyurethane layer 2041, a phenolic foam layer 2042 and a polystyrene layer 2043; the polyurethane layer 2041, the phenolic foam layer 2042 and the polystyrene layer 2043 are bonded together by epoxy adhesive in order to have good insulation properties and to maintain the temperature of food in a low temperature environment to prevent the food from spoiling due to the influence of low temperature.

[0032] In terms of bonding methods, the waterproof layer, tensile layer, high temperature resistant layer and thermal insulation layer are bonded together with epoxy glue. This glue has good bonding properties and high temperature resistance, and can effectively bond the various parts of the package together to ensure the integrity and stability of the package. In addition, epoxy glue also has good chemical resistance and corrosion resistance, and can effectively protect packaging materials and foods from the effects of chemicals and acid and alkali corrosion.

[0033] The waterproof layer, tensile layer, high temperature resistant layer and thermal insulation layer used in this embodiment are all food grade materials, which are safe and non-toxic, meet the hygiene standards, and can ensure the safety of food. In summary, wrapping food with the food grade packaging PE film can effectively protect the food from external factors and ensure the quality and taste of the food.

[0034] The working principle of the above embodiment is:

[0035] The base film layer 100 composed of a polyethylene layer 101 and a polypropylene layer 102 ensures the integrity and tensile resistance of the PE film; a waterproof structure is bonded on one side of the base film layer 100 by epoxy glue, and then the palmitic acid layer 2011, the polyurethane waterproof coating layer 2012, the polyurethane waterproof coating layer 2013, the polyester fiber layer 2021, the Lycra fiber layer 2022, the polyamide layer 2031, the silicon carbide coating 2032, the aluminum tripolyphosphate coating 2033, the polyurethane layer 2041, the phenolic foam layer 2042 and the polystyrene layer 2043 cooperate with each other to effectively prevent moisture penetration, resist high temperature and chemical corrosion, and withstand a certain tensile force; at the same time, the waterproof layer, the tensile layer, the high temperature resistant layer and the thermal insulation layer are bonded together by epoxy glue to ensure the integrity and stability of the packaging.

[0036] Compared with the prior art: the food-grade packaging PE film with waterproof function can effectively prevent moisture penetration and keep the food dry and fresh through the mutual cooperation between the waterproof mechanisms 200 on the base film layer 100, and can also effectively resist high temperature and chemical corrosion to ensure the stability and durability of the packaging material. In addition, it has an anti-tearing function, can withstand a certain tensile force, is not easy to break, and ensures the integrity of the food packaging, thereby effectively improving the waterproof and anti-tearing effect of the existing PE film and solving the problem of poor waterproof and anti-tearing effect of the existing PE film.

[0037] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0038] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A food-grade packaging PE film with waterproof function, comprising a base film layer (100), characterized in that: A waterproof structure (200) is bonded to one side of the base film layer (100) by epoxy adhesive, and a PE film is formed between the base film layer (100) and the waterproof structure (200) by heat pressing; The waterproof mechanism (200) comprises a waterproof layer, a tensile layer, a high temperature resistant layer and a thermal insulation layer; one side of the waterproof layer is bonded to one side of the base membrane layer (100) by epoxy glue, the side of the waterproof layer away from the base membrane layer (100) is bonded to one side of the tensile layer by epoxy glue, the side of the tensile layer away from the waterproof layer is bonded to one side of the high temperature resistant layer by epoxy glue, and the side of the high temperature resistant layer away from the tensile layer is bonded to one side of the thermal insulation layer by epoxy glue.

2. The food-grade PE film with waterproof function according to claim 1, characterized in that: The base film layer (100) consists of a polyethylene layer (101) and a polypropylene layer (102).

3. The food-grade PE film with waterproof function according to claim 1, characterized in that: The sum of the thicknesses of the base membrane layer (100) and the waterproof mechanism (200) is 0.02 mm to 0.05 mm, and the widths of the base membrane layer (100) and the waterproof mechanism (200) are both 5-10 mm and the lengths are both 30-50 mm.

4. The food-grade PE film with waterproof function according to claim 1, characterized in that: The waterproof layer comprises a palmitic acid layer (2011), a polyurethane waterproof coating layer (2012) and an acrylic emulsion layer (2013); the palmitic acid layer (2011), the polyurethane waterproof coating layer (2012) and the acrylic emulsion layer (2013) are all bonded together by epoxy adhesive.

5. The food-grade PE film with waterproof function according to claim 1, characterized in that: The tensile layer comprises a polyester fiber layer (2021) and a Lycra fiber layer (2022); the polyester fiber layer (2021) and the Lycra fiber layer (2022) are bonded together by epoxy adhesive.

6. The food-grade PE film with waterproof function according to claim 1, characterized in that: The high temperature resistant layer comprises a polyamide layer (2031), a silicon carbide coating (2032) and an aluminum tripolyphosphate coating (2033); the polyamide layer (2031), the silicon carbide coating (2032) and the aluminum tripolyphosphate coating (2033) are all bonded together by epoxy adhesive.

7. The food-grade PE film with waterproof function according to claim 1, characterized in that: The thermal insulation layer comprises a polyurethane layer (2041), a phenolic foam layer (2042) and a polystyrene layer (2043); the polyurethane layer (2041), the phenolic foam layer (2042) and the polystyrene layer (2043) are all bonded together by epoxy adhesive.

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