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A kind of environment-friendly composite material capable of recycling metal, plastic and paper and its preparation method

A composite material and environment-friendly technology, applied in the field of packaging materials, can solve the problems of difficult separation of waste liquid, no fully degradable adhesive layer, high recycling cost, etc., to achieve green raw materials, good application and market prospects , low cost effect

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

This method is based on the consumption of formic acid and other organic acids in the pretreatment, the recovery cost is high, and the separated waste liquid is difficult to handle
[0006] To sum up, the aluminum-plastic-paper composite packaging film currently occupying a major market share adopts traditional bonding methods in the design and preparation stages of packaging products, and the classification and recycling method mainly relies on mechanical and mechanical bonding of the composite packaging film after the storage period and shelf life Chemical post-treatment, no fully degradable adhesive layer is added in the design and preparation of packaging products

Method used

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  • A kind of environment-friendly composite material capable of recycling metal, plastic and paper and its preparation method
  • A kind of environment-friendly composite material capable of recycling metal, plastic and paper and its preparation method
  • A kind of environment-friendly composite material capable of recycling metal, plastic and paper and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] An environment-friendly composite material, which sequentially comprises a kraft paper layer, an adhesive layer, an aluminum layer, an adhesive layer, and a polyethylene layer; the thickness of the kraft paper layer is 30 μm, the thickness of the adhesive layer is 50 μm, the aluminum The thickness of the layer is 6 μm, and the thickness of the polyethylene layer is 100 μm;

[0055] The adhesive layer is formed of modified polyglycolic acid, and the composition of the modified polyglycolic acid is shown in Table 1.

[0056] The preparation method of the above-mentioned environment-friendly composite material includes:

[0057] S1: Input the modified polyglycolic acid pellets into the first sub-screw extruder in the double co-extrusion composite production line, make the pellets form a uniform fluid at a melting temperature of 250-350°C, and then pass through the flat die Extruded to form a cast film as an adhesive layer;

[0058] S2: Stretch and transfer the cast film ...

Embodiment 2

[0063] An environment-friendly composite material, which successively comprises an oil paper layer, an adhesive layer, an aluminum layer, an adhesive layer, and a polyethylene layer; the thickness of the oil paper layer is 100 μm, the thickness of the adhesive layer is 15 μm, the aluminum The thickness of the layer is 7 μm, the thickness of the polyethylene layer is 80 μm;

[0064] The adhesive layer is formed of modified polyglycolic acid, and the composition of the modified polyglycolic acid is shown in Table 1.

[0065] The preparation method of the above-mentioned environment-friendly composite material includes:

[0066] S1: Input the modified polyglycolic acid pellets into the first sub-screw extruder in the double co-extrusion composite production line, make the pellets form a uniform fluid at a melting temperature of 250-350°C, and then pass through the flat die Extruded to form a cast film as an adhesive layer;

[0067] S2: Stretch and transfer the cast film obtaine...

Embodiment 3

[0072] An environment-friendly composite material, which successively comprises a cellophane layer, an adhesive layer, an aluminum layer, an adhesive layer, and a polyethylene layer; the thickness of the cellophane layer is 150 μm, the thickness of the adhesive layer is 20 μm, the aluminum The thickness of the layer is 9 μm, and the thickness of the polyethylene layer is 120 μm;

[0073] The adhesive layer is formed of modified polyglycolic acid, and the composition of the modified polyglycolic acid is shown in Table 1.

[0074] The preparation method of the above-mentioned environment-friendly composite material includes:

[0075] S1: Input the modified polyglycolic acid pellets into the first sub-screw extruder in the double co-extrusion composite production line, make the pellets form a uniform fluid at a melting temperature of 250-350°C, and then pass through the flat die Extruded to form a cast film as an adhesive layer;

[0076] S2: Stretch and transfer the cast film o...

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Abstract

The invention relates to the field of packaging materials, in particular to an environment-friendly composite material capable of classifying and recycling metals, plastics and paper and a preparation method thereof. The composite material of the present invention sequentially comprises a first matrix layer, an adhesive layer, a second matrix layer, an adhesive layer and a third matrix layer; the first matrix layer, the second matrix layer and the third matrix layer are independently selected One of plastic, metal and paper; the plastic is polyolefin; the adhesive layer is formed of modified polyglycolic acid. The environment-friendly composite packaging material of the present invention utilizes modified polyglycolic acid as an adhesive layer to connect the base layer, and the adhesive layer can be decomposed into low molecular compounds in an appropriate and determinable natural environment, and finally completely degraded into water and carbon dioxide , so that the connection between the substrate layers such as metal, plastic and paper is lost, so that it can be completely separated and the effect of classification and recycling can be achieved. At the same time the modified polyglycolic acid provides a good gas barrier function in the final product.

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 metal, plastic and paper and a preparation method thereof. Background technique [0002] Multi-layer composite packaging materials made of metal, plastic, and paper as the main raw materials follow the principle of maximizing strengths and avoiding weaknesses in microstructure, and become a more practical and complete packaging material by synergistically exerting the advantages of a single component, thereby improving economic benefits . This kind of composite packaging material has the characteristics of high barrier property, safety and sanitation, convenient use and low cost. It has been widely used in the packaging fields of food, medicine, chemicals and daily necessities, and the demand is still increasing year by year. [0003] As a high-performance packaging material, metal, plastic and paper c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/20B32B15/12B32B7/12B32B15/085B32B27/32B32B37/10B32B37/06B32B37/08B65D65/40C09J167/04C09J11/04C09J11/06C09J11/08
CPCB32B7/12B32B15/085B32B15/12B32B15/20B32B27/32B32B37/06B32B37/08B32B37/10B32B2323/04B65D65/40C08L2201/06C08L2205/025C08L2205/035C08L2205/16C09J11/04C09J11/06C09J11/08C09J167/04C08L3/02C08L67/04C08K13/02C08K3/04C08K5/20C08K3/34C08K3/36Y02W90/10
Inventor 安家成
Owner 睿泊(中国)环保科技有限公司
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