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An environment-friendly composite material capable of sorting and recycling metals and plastics and its preparation method

A technology for composite materials and composite packaging materials, applied in the field of environment-friendly composite materials and their preparation, to achieve the effects of simple preparation methods, increased gas barrier performance, and low cost

Active Publication Date: 2021-08-10
睿泊(中国)环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the concept and method of using a degradable adhesive layer to automatically separate metal and plastic after a certain service life has not been reported

Method used

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  • An environment-friendly composite material capable of sorting and recycling metals and plastics and its preparation method
  • An environment-friendly composite material capable of sorting and recycling metals and plastics and its preparation method
  • An environment-friendly composite material capable of sorting and recycling metals and plastics and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] An environment-friendly composite material, which successively comprises a polyhydroxyalkanoate layer, an adhesive layer, an aluminum layer, an adhesive layer, a polyamide-6 layer, an adhesive layer, and a polyethylene layer; the polyhydroxyalkanoate layer The thickness of the adhesive layer is 12 μm, the thickness of the adhesive layer is 15 μm, the thickness of the aluminum layer is 7 μm, the thickness of the polyamide-6 layer is 15 μm, and the thickness of the polyethylene layer is 60 μm;

[0054] The adhesive layer is formed of modified polyglycolic acid, and the composition of the modified polyglycolic acid is shown in Table 1.

[0055] The preparation method of the above-mentioned environment-friendly composite material includes:

[0056] S1: Input the modified polyglycolic acid pellets into the first sub-screw extruder in the triple co-extrusion composite production line, make the pellets form a uniform fluid at a melting temperature of 250-350°C, and then extrud...

Embodiment 2

[0065] An environment-friendly composite material, which successively comprises a polyethylene terephthalate layer, an adhesive layer, an aluminum layer, an adhesive layer, a polyamide-66 layer, an adhesive layer, and a polyethylene layer; the polyethylene terephthalate The thickness of the ethylene diformate layer is 12 μm, the thickness of the adhesive layer is 15 μm, the thickness of the aluminum layer is 9 μm, the thickness of the polyamide-66 layer is 15 μm, and the thickness of the polyethylene layer is 90 μm ;

[0066] The adhesive layer is formed of modified polyglycolic acid, and the composition of the modified polyglycolic acid is shown in Table 1.

[0067] The preparation method of the above-mentioned environment-friendly composite material includes:

[0068] S1: Input the modified polyglycolic acid pellets into the first sub-screw extruder in the triple co-extrusion composite production line, make the pellets form a uniform fluid at a melting temperature of 250-35...

Embodiment 3

[0077] An environment-friendly composite material, which successively comprises a polyamide-610 layer, an adhesive layer, an aluminum layer, an adhesive layer, a polyamide-12 layer, an adhesive layer, and a polyethylene layer; the polyamide-610 layer, poly The thickness of the amide-12 layer is 15 μm, the thickness of the adhesive layer is 15 μm, the thickness of the aluminum layer is 9 μm, and the thickness of the polyethylene layer is 90 μm;

[0078] The adhesive layer is formed of modified polyglycolic acid, and the composition of the modified polyglycolic acid is shown in Table 1.

[0079] The preparation method of the above-mentioned environment-friendly composite material includes:

[0080]S1: Input the modified polyglycolic acid pellets into the first sub-screw extruder in the triple co-extrusion composite production line, make the pellets form a uniform fluid at a melting temperature of 250-350°C, and then extrude them through a flat die Pressed to form a cast film as...

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Abstract

The invention relates to the field of packaging materials, in particular to an environment-friendly composite material capable of sorting and recycling metals and plastics and a preparation method thereof. The environment-friendly composite material of the present invention comprises in turn: a first base layer, an adhesive layer, a second base layer, an adhesive layer, a third base layer, an adhesive layer, and a fourth base layer; the first base layer, The second base layer, the third base layer, and the fourth base layer are independently selected from plastic or metal; the plastic is polyester, polyolefin, nylon; the adhesive layer is formed of modified polyglycolic acid. The present invention is a composite material formed by using degradable modified polyglycolic acid as an adhesive layer to connect different base layers. Under the natural environmental conditions with proper and definite deadlines, the adhesive layer will gradually decompose under the action of moisture and microorganisms It is a low-molecular compound, and finally completely decomposes into water and carbon dioxide, so that the matrix layer loses connection, and the metal and plastic are completely separated to achieve the effect of classification and recycling. The preparation method of the invention is simple.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to an environment-friendly composite material capable of sorting and recycling metals and plastics and a preparation method thereof. Background technique [0002] Metal and plastic composite packaging materials are widely used in the packaging fields of food, medicine, chemicals and daily chemical products because of their light-blocking, low-cost and non-toxic characteristics, but they also generate a large amount of non-degradable waste, especially It is plastic and metal that are still tightly connected after the end of their useful life, making it difficult to recycle. It not only loses a lot of aluminum and plastic resources, but also pollutes the environment. Therefore, recycling aluminum-plastic composite packaging materials can not only reduce environmental pollution, but also have good economic and social benefits. [0003] At present, mechanical and chemical methods ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/36B32B15/20B32B15/09B32B15/088B32B27/34B32B27/08B32B27/32B32B37/10B32B37/06B32B37/08B32B7/12B65D65/40
CPCB32B7/12B32B15/088B32B15/09B32B15/20B32B27/08B32B27/32B32B27/34B32B27/36B32B37/06B32B37/08B32B37/10B65D65/40Y02W90/10
Inventor 安家成
Owner 睿泊(中国)环保科技有限公司
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