High-strength and environment-friendly polyamide composite bag

Abstract

The utility model relates to a high-strength and environment-friendly polyamide composite bag, and belongs to the technical field of composite bags, the high-strength and environment-friendly polyamide composite bag comprises a polyamide composite bag body, and the polyamide composite bag body comprises a bag body and a sealing end arranged at the top end of the bag body and used for sealing; the bag body is composed of a composite bag inner layer and a composite bag outer layer. The composite bag inner layer comprises an anti-corrosion layer, first kraft paper and a high-temperature polyvinyl alcohol film; and the composite bag outer layer comprises second kraft paper and a waterproof layer. According to the high-strength and environment-friendly polyamide composite bag, the first kraft paper and the second kraft paper are arranged to be of a two-layer composite structure, the surface layer is formed by compositing a polyamide film and provides strength and durability, and the lining layer is formed by a film formed by polyethylene resin in a blow molding mode and provides sealing performance and moisture resistance; meanwhile, the first kraft paper and the second kraft paper have degradability, so that the composite bag has environmental protection performance, and the advantages of being high in practicability and good in environmental protection effect are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of composite bags, and in particular to a high-strength and environmentally friendly polyamide composite bag. Background Art

[0002] Composite bags are a type of packaging bag. They are suitable for vacuum packaging or general packaging of food, electronics, chemicals, pharmaceuticals, tea, precision instruments, and cutting-edge defense products. Due to their unique structure and material combination, composite bags offer several significant benefits: 1. High Strength: Made from multiple layers of material, composite bags are highly resistant to puncture and tearing, and can withstand significant external forces and pressure. 2. Excellent Protection: Composite bags are moisture-proof, air-proof, and UV-proof, and also offer excellent heat and cold resistance, effectively protecting the contents. 3. Aesthetics: Composite bags can be customized to meet specific needs, offering an aesthetically pleasing appearance that enhances the overall value of the product.

[0003] A search revealed a Chinese utility model patent with publication number CN218840308U, which discloses a flame-retardant nylon composite bag. The patent includes a seal, an auxiliary layer, and a storage cavity. The seal is attached to the upper and lower sides of the bag, which defines a storage cavity. The bag includes a flame-retardant protective layer, an auxiliary layer, and a waterproof layer. The flame-retardant protective layer is laminated on top of the auxiliary layer and is thinner than the auxiliary layer. Several auxiliary strips are woven into the auxiliary layer. This application is simple to apply. The flame-retardant protective layer provides flame-retardant protection for the surface of the composite bag. The auxiliary strips within the auxiliary layer further enhance the composite bag's flame retardancy and thermal insulation, increasing its applicability and reducing damage to the nylon base layer within the composite bag. The impact-resistant protective layer improves the impact resistance of the composite bag's exterior, reducing the risk of scratches. The waterproof layer provides waterproof protection for the interior of the nylon base layer.

[0004] In the process of implementing this application, there are at least the following problems in this technology. The flame-retardant nylon composite bag uses non-degradable materials, such as a nylon base layer. Nylon is a synthetic polymer material made from chemical raw materials such as petroleum. Its decomposition cycle is very long and it has certain pollution to the environment. Therefore, it is not an environmentally friendly fabric. It will cause the packaging bag to exist in the environment for a long time, and it will also cause threats and damage to the environment. Therefore, a high-strength and environmentally friendly polyamide composite bag is proposed to solve the above problems. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the present application provides a high-strength and environmentally friendly polyamide composite bag, which has the advantages of strong practicality and good environmental protection effect, and solves the problem of poor environmental protection of the composite bag.

[0006] In summary, the present application provides the following technical solutions: a high-strength and environmentally friendly polyamide composite bag, comprising a polyamide composite bag body, wherein the polyamide composite bag body comprises a bag body and a sealing end provided at the top end of the bag body for sealing;

[0007] The bag body is composed of a composite bag inner layer and a composite bag outer layer;

[0008] The inner layer of the composite bag comprises an anti-corrosion layer, a first kraft paper and a high-temperature polyvinyl alcohol film;

[0009] The outer layer of the composite bag comprises a second kraft paper and a waterproof layer.

[0010] The present application adopts the above-mentioned technical solution, using the first kraft paper and the second kraft paper to form a two-layer composite structure. The surface layer is composited with a polyamide film to provide strength and durability. The inner lining layer is composed of a film blown by a polyethylene resin to provide sealing and moisture resistance, which greatly improves the strength of the composite bag. At the same time, the first kraft paper and the second kraft paper are degradable, making the composite bag environmentally friendly, achieving the advantages of strong practicality and good environmental protection effects.

[0011] Furthermore, the inner layer of the composite bag is arranged in sequence from the outside to the inside, and the high-temperature polyvinyl alcohol film, the first kraft paper and the anti-corrosion layer are bonded to each other.

[0012] The beneficial effect of adopting the above further solution is that by providing an anti-corrosion layer on the polyamide composite bag body and using it in combination with polyamide, the sealing and moisture-proof properties of the polyamide composite bag body are improved.

[0013] Furthermore, the anti-corrosion layer is a polyethylene resin material component, and the sealing end is a self-supporting zipper.

[0014] The beneficial effect of adopting the above further solution is that by arranging a self-supporting zipper on the polyamide composite bag body, it is convenient to seal the top thereof, thereby improving its sealing performance.

[0015] Furthermore, the inner layer and outer layer of the composite bag are arranged from inside to outside, the outer layer of the composite bag is installed on the outer surface of the inner layer of the composite bag, and a fireproof layer is installed on the side of the outer layer of the composite bag away from the inner layer of the composite bag.

[0016] The beneficial effect of adopting the above further scheme is: by arranging a fireproof layer on the outer layer of the combined bag, the flame retardant effect of the polyamide composite bag body can be enhanced, and the waterproof layer can be used to effectively prevent the second kraft paper and the first kraft paper from being damaged by fire and deteriorating due to moisture.

[0017] Furthermore, the second kraft paper and the waterproof layer are arranged from the inside to the outside, and the waterproof layer is coated on the outside of the second kraft paper.

[0018] The beneficial effect of adopting the above further solution is that, by providing the waterproof layer, the polyamide composite bag body has the characteristics of being water-resistant, oil-resistant, high-temperature-resistant, and moisture-resistant.

[0019] Furthermore, the waterproof layer is a polyamide film, and the waterproof layer is coated by spraying.

[0020] The beneficial effect of adopting the above further solution is that the protective performance of the polyamide composite bag body is improved by providing the waterproof layer and the fireproof layer.

[0021] Compared with the prior art, this application provides a high-strength and environmentally friendly polyamide composite bag with the following beneficial effects:

[0022] 1. This high-strength and environmentally friendly polyamide composite bag adopts a two-layer composite structure of a first kraft paper and a second kraft paper. The surface layer is composited with a polyamide film to provide strength and durability. The inner lining layer is composed of a film blown by a polyethylene resin to provide sealing and moisture resistance, which greatly improves the strength of the composite bag. At the same time, the first and second kraft papers are biodegradable, making the composite bag environmentally friendly, achieving the advantages of strong practicality and good environmental protection effect, and solving the problem of poor environmental protection of the composite bag.

[0023] 2. The high-strength and environmentally friendly polyamide composite bag has the characteristics of water resistance, oil resistance, high temperature resistance, and moisture resistance by setting a high-temperature polyvinyl alcohol film, thereby improving the protective performance of the polyamide composite bag body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view of the structure of this application;

[0025] Figure 2 It is a structural diagram of the bag body of this application;

[0026] Figure 3 It is a schematic structural diagram of the inner layer of the composite bag of the present application;

[0027] Figure 4 It is a schematic diagram of the structure of the outer layer of Benshen composite bag.

[0028] Description of reference numerals:

[0029] 1. Polyamide composite bag body; 101. Bag body; 1011. Composite bag inner layer; 10111. Anti-corrosion layer; 10112. First kraft paper; 10113. High-temperature polyvinyl alcohol film; 1012. Composite bag outer layer; 10121. Second kraft paper; 10122. Waterproof layer; 102. Sealed end; 103. Fireproof layer. DETAILED DESCRIPTION

[0030] See also Figure 1 A high-strength and environmentally friendly polyamide composite bag includes a polyamide composite bag body 1, which includes a bag body 101 and a sealing end 102 disposed at the top of the bag body 101 for sealing. The sealing end 102 is a self-supporting zipper. The self-supporting zipper on the polyamide composite bag body 1 facilitates sealing the top of the bag, improving its sealing performance.

[0031] See also Figures 1-4 In this embodiment, the bag body 101 is composed of a composite bag inner layer 1011 and a composite bag outer layer 1012. The composite bag inner layer 1011 includes an anti-corrosion layer 10111, a first kraft paper 10112, and a high-temperature polyvinyl alcohol film 10113. The composite bag outer layer 1012 includes a second kraft paper 10121 and a waterproof layer 10122. The provision of the waterproof layer 10122 makes the polyamide composite bag body 1 resistant to water, oil, heat, and moisture.

[0032] Specifically, the inner layer 1011 of the composite bag is arranged from the outside to the inside, and the high-temperature polyvinyl alcohol film 10113, the first kraft paper 10112, and the anti-corrosion layer 10111 are bonded together. The second kraft paper 10121 and the waterproof layer 10122 are arranged from the inside to the outside, and the waterproof layer 10122 is coated on the outside of the second kraft paper 10121.

[0033] It should be noted that the anti-corrosion layer 10111 is made of polyethylene resin. The composite bag inner layer 1011 and the composite bag outer layer 1012 are arranged from the inside out. The composite bag outer layer 1012 is installed on the outer surface of the composite bag inner layer 1011. The fireproof layer 103 is installed on the side of the composite bag outer layer 1012 away from the composite bag inner layer 1011. The waterproof layer 10122 is a polyamide film, and the waterproof layer 10122 is applied by spraying. The composite bag's strength is greatly enhanced by the two-layer composite structure of the first kraft paper 10112 and the second kraft paper 10121. The surface layer is composed of a polyamide film composite to provide strength and durability, while the inner lining layer is composed of a polyethylene resin blown film to provide sealing and moisture resistance.

[0034] In addition, the first kraft paper 10112 and the second kraft paper 10121 are degradable, making the composite bag environmentally friendly. The high-temperature polyvinyl alcohol film 10113 is a polyvinyl alcohol with a molecular weight of more than 1799, which is a water-soluble polymer and is non-toxic, odorless, and harmless to the human body, and has good affinity with the natural environment.

[0035] Furthermore, because the polyvinyl alcohol used in the high-molecular-weight, high-temperature polyvinyl alcohol film 10113 of the polyamide composite bag body 1 is the only vinyl polymer that can be used by bacteria as a carbon and energy source, it can degrade by 70%-75% in 46 days under the action of bacteria and enzymes, making it a biodegradable polymer. The bag body 2, which is similar to paper, can also be processed into outer bags or small boxes of various shapes. When the outer packaging composite bag needs to be discarded during use, the composite bag body 1 can be buried in the soil nearby. In the natural environment, the composite bag body 1 can be degraded by microorganisms, decomposed by mold, or rapidly dissolved in high-temperature water. This ensures that no risks are posed to the environment, crops, or user health.

[0036] To sum up, the polyamide composite bag body 1 used in this embodiment is compared with traditional non-degradable packaging bags, especially when used in the field of packaging chemical preparations or pesticide preparations, avoiding the residue of pesticides or preparations in the packaging bags. After use, there is no need to recycle the packaging bags, and they can be buried on site or dissolved in water, avoiding harm to the environment and crops, and saving the cost of recycling and processing.

[0037] The working principle of the above embodiment is:

[0038] This high-strength and environmentally friendly polyamide composite bag is formed into a two-layer composite structure by adopting a first kraft paper 10112 and a second kraft paper 10121. The surface layer is composited with a polyamide film to provide strength and durability. The inner lining layer is composed of a film blown by polyethylene resin to provide sealing and moisture-proof properties, which greatly improves the strength of the composite bag. At the same time, the first kraft paper 10112 and the second kraft paper 10121 are degradable, making the composite bag environmentally friendly. In addition, the high-temperature polyvinyl alcohol film 10113 is a polyvinyl alcohol with a molecular weight of more than 1799. It is a water-soluble polymer and is non-toxic, odorless, and harmless to the human body, and has good affinity with the natural environment.

Claims

1. A high-strength and environmentally friendly polyamide composite bag, comprising a polyamide composite bag body (1), characterized in that: The polyamide composite bag body (1) comprises a bag body (101) and a sealing end (102) provided at the top end of the bag body (101) for sealing; The bag body (101) is composed of a composite bag inner layer (1011) and a composite bag outer layer (1012); The composite bag inner layer (1011) includes an anti-corrosion layer (10111), a first kraft paper (10112) and a high-temperature polyvinyl alcohol film (10113); The outer layer (1012) of the composite bag comprises a second kraft paper (10121) and a waterproof layer (10122).

2. The high-strength and environmentally friendly polyamide composite bag according to claim 1, characterized in that: The inner layer (1011) of the composite bag is arranged in sequence from the outside to the inside, and the high-temperature polyvinyl alcohol film (10113), the first kraft paper (10112) and the anti-corrosion layer (10111) are bonded to each other.

3. The high-strength and environmentally friendly polyamide composite bag according to claim 1, characterized in that: The anti-corrosion layer (10111) is a polyethylene resin material component, and the sealing end (102) is a self-supporting zipper.

4. The high-strength and environmentally friendly polyamide composite bag according to claim 1, characterized in that: The composite bag inner layer (1011) and the composite bag outer layer (1012) are arranged from the inside to the outside, the composite bag outer layer (1012) is installed on the outer surface of the composite bag inner layer (1011), and a fireproof layer (103) is installed on the side of the composite bag outer layer (1012) away from the composite bag inner layer (1011).

5. The high-strength and environmentally friendly polyamide composite bag according to claim 1, characterized in that: The second kraft paper (10121) and the waterproof layer (10122) are arranged from the inside to the outside, and the waterproof layer (10122) is coated on the outside of the second kraft paper (10121).

6. The high-strength and environmentally friendly polyamide composite bag according to claim 5, characterized in that: The waterproof layer (10122) is a polyamide film, and the coating method of the waterproof layer (10122) is spraying.

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