Multi-layer composite aluminum foil paper

Abstract

The utility model provides multi-layer composite aluminum foil paper which comprises an outer protective layer, an aluminum foil layer and a functional layer which are sequentially arranged from inside to outside, and all the layers are bonded and compounded through a water-based adhesive. The outer protective layer comprises an anti-oxidation layer, an anti-puncture layer and a reinforcing layer which are sequentially arranged from outside to inside; the functional layer comprises a moisture absorption layer, an antibacterial layer and an easy-to-peel layer which are sequentially arranged from outside to inside. The multi-layer composite structure provides oxidation resistance, puncture resistance and enhanced protection, so that the packaging material can adapt to various severe environments and conditions; the addition of the antibacterial layer provides additional hygienic guarantee, and is especially suitable for packaging of food, medical supplies and the like needing antibacterial protection; due to the design of the easy-to-peel layer, a user can easily open the package, and the use convenience is improved; through combination of layers with different functions, the composite aluminum foil paper can meet various packaging requirements such as food, medicine and electronic products, and has wide application prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of composite aluminum foil paper, in particular to a multi-layer composite aluminum foil paper. Background Art

[0002] With the development of society and the increasing consumer awareness of food safety and environmental protection, the demand for multifunctional, high-performance packaging materials is growing. While traditional single-layer aluminum foil offers certain barrier properties, it lacks significant advantages in terms of antioxidant, puncture resistance, reinforcement, moisture absorption, antibacterial properties, and ease of peeling, making it difficult to meet modern packaging requirements. In particular, packaging materials in the food, pharmaceutical, and electronic device sectors are facing increasingly stringent requirements, requiring them to possess multiple functions to ensure product quality and safety. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a multi-layer composite aluminum foil paper to solve the problem that the aluminum foil paper in the prior art has poor anti-puncture and antibacterial effects.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides the following technical solutions:

[0005] A multi-layer composite aluminum foil comprises an outer protective layer, an aluminum foil layer, and a functional layer, which are sequentially arranged from the inside out, and the layers are bonded and composited by a water-based adhesive; the outer protective layer comprises an anti-oxidation layer, an anti-puncture layer, and a reinforcement layer, which are sequentially arranged from the outside in; and the functional layer comprises a moisture-absorbing layer, an antibacterial layer, and an easy-to-peel layer, which are sequentially arranged from the outside in.

[0006] To implement the above technical solution, the outer protective layer consists of an outermost antioxidant layer, a second outermost puncture-proof layer and an inner reinforcement layer. The outermost antioxidant layer provides preliminary protection to prevent degradation caused by oxygen and extend the service life of the packaging material. The puncture-proof layer enhances the puncture resistance of the material and protects the inner layer from external physical damage. The reinforcement layer further enhances the strength and durability of the overall material. The aluminum foil layer serves as the core layer, providing excellent barrier properties to prevent gas, moisture and light from penetrating, thereby maintaining the freshness and stability of the items inside the package. The outer layer of the functional layer is a hygroscopic layer, the middle layer is an antibacterial layer, and the inner layer is an easy-to-peel layer. The hygroscopic layer can absorb excess moisture and maintain a dry environment inside the package. The antibacterial layer prevents the growth of microorganisms and is suitable for food and other items that require antibacterial packaging. The easy-to-peel layer allows users to easily open the package, thereby improving ease of use.

[0007] In one embodiment of the present invention, the side edges of the multi-layer composite aluminum foil are provided with a sealing layer, an antistatic layer and a waterproof layer in sequence from the inside to the outside.

[0008] To implement the above technical solution, the main function of the sealing layer is to prevent air and moisture from penetrating from the sides, ensuring the safety of internal items. The anti-static layer is located on the outside of the sealing layer and can effectively dissipate static electricity, reduce the accumulation of static electricity caused by friction during packaging and transportation, and protect sensitive electronic products from static damage. The waterproof layer is located on the outermost side and provides additional waterproof protection to prevent moisture penetration, which is particularly suitable for product packaging that requires waterproof and moisture-proofing.

[0009] In one embodiment of the present invention, the anti-oxidation layer is a composite material of polyamide and polyethylene with a thickness of 0.05-0.1 mm; the anti-puncture layer is interwoven with high-strength polyester fiber and nylon fiber with a thickness of 0.1-0.3 mm; the reinforcement layer is interwoven with glass fiber and polyester fiber with a thickness of 0.1-0.3 mm.

[0010] To implement the above technical solution, the anti-oxidation layer is made of a polyamide and polyethylene composite material. This composite material combines the wear resistance of polyamide with the chemical stability of polyethylene, providing excellent anti-oxidation properties. The thickness of this layer is controlled between 0.05-0.1mm to ensure that the material remains light and thin while effectively preventing oxygen-induced material aging and food spoilage. The puncture-proof layer is interwoven with high-strength polyester fiber and nylon fiber. This structure gives the material high strength and puncture resistance, preventing external sharp objects from penetrating the packaging and protecting the internal products from physical damage. The reinforcement layer is interwoven with glass fiber and polyester fiber. Glass fiber is known for its high strength and heat resistance, while polyester fiber provides flexibility and wear resistance.

[0011] In one embodiment of the present invention, the moisture-absorbing layer is a composite material of natural bamboo charcoal fiber and diatomaceous earth with a thickness of 0.1-0.3 mm; the antibacterial layer is a silver ion antibacterial agent with a thickness of 0.05-0.1 mm; the material of the easy-to-peel layer is a composite material of polyethylene and polypropylene with a thickness of 0.05-0.1 mm.

[0012] To implement the above technical solution, the moisture-absorbing layer is made of a composite material of natural bamboo charcoal fiber and diatomaceous earth. This material has strong adsorption capacity and can absorb excess moisture in the package to keep the internal environment dry; the antibacterial layer contains silver ion antibacterial agents. These silver ions can inhibit the growth of microorganisms such as bacteria and fungi, protecting the items in the package from contamination; the design of the easy-to-peel layer allows users to easily open the package, improving the convenience of use, and is particularly suitable for occasions that require quick opening.

[0013] In one embodiment of the present invention, the sealing layer is made of hot melt adhesive, the antistatic layer is made of a composite material of conductive carbon black and polyethylene, and the waterproof layer is made of a polyurethane waterproof coating.

[0014] To implement the above technical solution, the sealing layer utilizes hot-melt adhesive, an adhesive that melts when heated and rapidly solidifies upon cooling. During the packaging process, the hot-melt adhesive is melted by a heating device and applied to the edge of the aluminum foil. Upon cooling, it quickly forms a strong seal, ensuring the airtightness of the package and preventing leakage of contents and intrusion of foreign matter. The antistatic layer is made of a composite material of conductive carbon black and polyethylene, which offers excellent antistatic properties. Conductive carbon black is dispersed in a polyethylene matrix, forming a conductive network that effectively dissipates static electricity, reducing static electricity accumulation caused by friction during packaging and transportation, and protecting sensitive electronic products from damage caused by static electricity. The waterproof layer utilizes polyurethane waterproof coating, a polymer material with excellent waterproof properties. The polyurethane waterproof coating forms a dense waterproof film on the surface of the aluminum foil, effectively preventing moisture penetration and protecting the contents of the package from moisture and humidity.

[0015] In one embodiment of the present invention, the thickness of the aluminum foil layer is 10-20 μm, and the thickness of the entire multi-layer composite aluminum foil paper is 0.5-1 mm.

[0016] To implement this technical solution, the thickness of the aluminum foil layer is controlled within a range of 10-20μm, providing good barrier properties while maintaining the material's flexibility and ease of processing. The overall thickness of the multi-layer composite aluminum foil is 0.5-1mm, ensuring strength and durability without being too heavy to compromise ease of packaging.

[0017] In one embodiment of the present invention, the water-based adhesive has a gram weight of 5-10 grams per square meter.

[0018] The choice of water-based adhesives for this technical solution is based on environmental and safety considerations. Water-based adhesives use water as a solvent. Compared to solvent-based adhesives, they release fewer volatile organic compounds during production and use, making them more environmentally and operator-friendly.

[0019] In one embodiment of the present invention, the puncture-resistant layer is in a grid or honeycomb shape.

[0020] To achieve this technical solution, the puncture-resistant layer utilizes a grid or honeycomb structure, widely recognized in materials science for its ability to provide excellent mechanical properties and puncture resistance. The grid or honeycomb structure's geometry disperses and absorbs external puncture forces, protecting the inner layer from damage.

[0021] As described above, the multi-layer composite aluminum foil of the present invention has the following beneficial effects: the multi-layer composite structure provides anti-oxidation, anti-puncture and enhanced protection, so that the packaging material can adapt to various harsh environments and conditions, such as high-oxygen environments and physical impacts; the addition of the antibacterial layer provides additional hygiene protection, which is particularly suitable for packaging of food, medical supplies, etc. that require antibacterial protection; the moisture-absorbing layer can absorb excess moisture inside the packaging, which is suitable for items that are sensitive to humidity, such as electronic components or certain foods; the design of the easy-to-peel layer enables users to easily open the package, which improves the convenience of use and is especially suitable for occasions that require quick opening; the use of water-based adhesives instead of traditional solvent-based adhesives reduces the impact on the environment and is in line with environmental protection trends; through the combination of layers with different functions, the composite aluminum foil can meet a variety of packaging needs, such as food, medicine, electronic products, etc., and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shown is a structural schematic diagram of the present utility model.

[0023] Component number description

[0024] 1. Aluminum foil layer; 2. Anti-oxidation layer; 3. Anti-puncture layer; 4. Reinforcement layer; 5. Moisture-absorbing layer; 6. Antibacterial layer; 7. Easy-to-peel layer; 8. Sealing layer; 9. Antistatic layer; 10. Waterproof layer. DETAILED DESCRIPTION

[0025] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless there is a conflict.

[0026] See also Figure 1 The utility model provides a multi-layer composite aluminum foil paper, comprising an outer protective layer, an aluminum foil layer 1 and a functional layer arranged in sequence from the inside to the outside, and the layers are bonded and compounded by a water-based adhesive; the outer protective layer comprises an anti-oxidation layer 2, an anti-puncture layer 3 and a reinforcement layer 4 arranged in sequence from the outside to the inside; the functional layer comprises a moisture-absorbing layer 5, an antibacterial layer 6 and an easy-to-peel layer 7 arranged in sequence from the outside to the inside.

[0027] The outer protective layer consists of the outermost antioxidant layer 2, the second outermost puncture-proof layer 3 and the inner reinforcement layer 4. The outermost antioxidant layer 2 provides preliminary protection to prevent degradation caused by oxygen and extend the service life of the packaging material. The puncture-proof layer 3 enhances the puncture resistance of the material and protects the inner layer from external physical damage. The reinforcement layer 4 further enhances the strength and durability of the overall material; the aluminum foil layer 1 serves as the core layer, providing excellent barrier properties to prevent gas, moisture and light from penetrating, thereby maintaining the freshness and stability of the items inside the package; the outer layer of the functional layer is a hygroscopic layer 5, the middle layer is an antibacterial layer 6, and the inner layer is an easy-peel layer 7. The hygroscopic layer 5 can absorb excess moisture and maintain a dry environment inside the package; the antibacterial layer 6 prevents the growth of microorganisms and is suitable for food and other items that require antibacterial packaging; the easy-peel layer 7 makes it easy for users to open the package, thereby improving ease of use.

[0028] The sides of the multi-layer composite aluminum foil are sequentially arranged from the inside out with a sealing layer 8, an antistatic layer 9, and a waterproof layer 10. The sealing layer 8 primarily prevents air and moisture from penetrating the sides, ensuring the safety of the contents. The antistatic layer 9, located outside the sealing layer 8, effectively dissipates static electricity, reducing static buildup due to friction during packaging and transportation, and protecting sensitive electronic products from static damage. The waterproof layer 10, located on the outermost edge, provides additional protection against moisture penetration, making it particularly suitable for packaging products requiring water and moisture resistance.

[0029] The anti-oxidation layer 2 is a composite material of polyamide and polyethylene, with a thickness of 0.05-0.1mm. The puncture-resistant layer 3 is a woven composition of high-strength polyester fiber and nylon fiber, with a thickness of 0.1-0.3mm. The reinforcement layer 4 is a woven composition of glass fiber and polyester fiber, with a thickness of 0.1-0.3mm. The anti-oxidation layer 2 is made of a composite material of polyamide and polyethylene, which combines the wear resistance of polyamide with the chemical stability of polyethylene, providing excellent anti-oxidation properties. The thickness of this layer is controlled between 0.05-0.1mm to ensure that the material remains light and thin while effectively preventing oxygen-induced material aging and food spoilage. The puncture-resistant layer 3 is a woven composition of high-strength polyester fiber and nylon fiber. This structure gives the material high strength and puncture resistance, preventing external sharp objects from penetrating the packaging and protecting the product inside from physical damage. The reinforcement layer 4 is a woven composition of glass fiber and polyester fiber. Glass fiber is known for its high strength and heat resistance, while polyester fiber provides flexibility and wear resistance.

[0030] The moisture absorbing layer 5 is a composite material of natural bamboo charcoal fiber and diatomaceous earth with a thickness of 0.1-0.3 mm; the antibacterial layer 6 is a silver ion antibacterial agent with a thickness of 0.05-0.1 mm; the easily peelable layer 7 is a composite material of polyethylene and polypropylene with a thickness of 0.05-0.1 mm.

[0031] The moisture-absorbing layer 5 is made of a composite material of natural bamboo charcoal fiber and diatomaceous earth. This material has a strong adsorption capacity and can absorb excess moisture in the package to keep the internal environment dry. The antibacterial layer 6 contains silver ion antibacterial agents. These silver ions can inhibit the growth of microorganisms such as bacteria and fungi, protecting the items in the package from contamination. The design of the easy-to-peel layer 7 allows users to easily open the package, improving the convenience of use and is particularly suitable for occasions where quick opening is required.

[0032] The sealing layer 8 is made of hot melt adhesive, the antistatic layer 9 is made of a composite material of conductive carbon black and polyethylene, and the waterproof layer 10 is made of a polyurethane waterproof coating. The sealing layer 8 is made of hot melt adhesive, an adhesive that melts when heated and quickly solidifies after cooling. During the packaging process, the hot melt adhesive is melted by a heating device and applied to the edge of the aluminum foil. After cooling, it quickly forms a strong seal, ensuring the airtightness of the package and preventing leakage of contents and intrusion of foreign substances. The antistatic layer 9 is made of a composite material of conductive carbon black and polyethylene, which can provide excellent antistatic properties. The conductive carbon black is dispersed in the polyethylene matrix to form a conductive network that can effectively dissipate static electricity, reduce the accumulation of static electricity caused by friction during packaging and transportation, and protect sensitive electronic products from static damage. The waterproof layer 10 is made of polyurethane waterproof coating, a polymer material with excellent waterproof properties. The polyurethane waterproof coating forms a dense waterproof film on the surface of the aluminum foil, which can effectively prevent moisture penetration and protect the items in the package from moisture and humidity.

[0033] The thickness of the aluminum foil layer 1 is 10-20 μm, and the overall thickness of the multi-layer composite aluminum foil is 0.5-1 mm. The thickness of the aluminum foil layer 1 is controlled within a range of 10-20 μm, providing excellent barrier properties while maintaining the material's flexibility and ease of processing. The overall thickness of the multi-layer composite aluminum foil is 0.5-1 mm, ensuring strength and durability without being too heavy to compromise packaging convenience.

[0034] The water-based adhesive has a grammage of 5-10 grams per square meter. The choice of water-based adhesive is based on environmental and safety considerations. Water-based adhesives use water as a solvent. Compared to solvent-based adhesives, they release fewer volatile organic compounds during production and use, making them more environmentally and operator-friendly.

[0035] The puncture-resistant layer 3 has a grid or honeycomb structure. This structure is widely recognized in materials science for its excellent mechanical properties and puncture resistance. The grid or honeycomb structure disperses and absorbs external puncture forces through its geometry, thereby protecting the inner layer from damage.

[0036] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any equivalent modifications or variations made by persons skilled in the art without departing from the spirit and technical concepts disclosed herein shall be encompassed by the claims of the present invention.

Claims

1. A multi-layer composite aluminum foil, characterized by: It consists of an outer protective layer, an aluminum foil layer and a functional layer arranged in sequence from the inside to the outside, and the layers are bonded and laminated by a water-based adhesive; The outer protective layer comprises an anti-oxidation layer, an anti-puncture layer and a reinforcement layer arranged in sequence from the outside to the inside; The functional layer comprises a moisture absorbing layer, an antibacterial layer and an easy-to-peel layer which are sequentially arranged from the outside to the inside.

2. The multi-layer composite aluminum foil according to claim 1, characterized in that: The sides of the multi-layer composite aluminum foil paper are provided with a sealing layer, an antistatic layer and a waterproof layer from the inside to the outside.

3. The multi-layer composite aluminum foil according to claim 1, characterized in that: The anti-oxidation layer is a composite material of polyamide and polyethylene with a thickness of 0.05-0.1 mm; The puncture-proof layer is made of high-strength polyester fiber and nylon fiber interwoven, with a thickness of 0.1-0.3mm; The reinforcement layer is made of glass fiber and polyester fiber interwoven together, and has a thickness of 0.1-0.3 mm.

4. The multi-layer composite aluminum foil according to claim 1, characterized in that: The moisture absorbing layer is a composite material of natural bamboo charcoal fiber and diatomaceous earth, with a thickness of 0.1-0.3 mm; The antibacterial layer is a silver ion antibacterial agent with a thickness of 0.05-0.1 mm; The easy-to-peel layer is made of a composite material of polyethylene and polypropylene, and has a thickness of 0.05-0.1 mm.

5. The multi-layer composite aluminum foil according to claim 2, characterized in that: The sealing layer is made of hot melt adhesive, the antistatic layer is made of a conductive carbon black and polyethylene composite material, and the waterproof layer is made of a polyurethane waterproof coating.

6. The multi-layer composite aluminum foil according to claim 1, characterized in that: The thickness of the aluminum foil layer is 10-20 μm, and the thickness of the entire multi-layer composite aluminum foil paper is 0.5-1 mm.

7. The multi-layer composite aluminum foil according to claim 1, characterized in that: The water-based adhesive has a gram weight of 5-10 grams per square meter.

8. The multi-layer composite aluminum foil according to claim 1, characterized in that: The anti-puncture layer is in a grid or honeycomb shape.

Images