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Environment-friendly composite material capable of realizing sorted recovery of metal, plastic and paper, and preparation method thereof

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

Active Publication Date: 2019-09-20
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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  • Environment-friendly composite material capable of realizing sorted recovery of metal, plastic and paper, and preparation method thereof
  • Environment-friendly composite material capable of realizing sorted recovery of metal, plastic and paper, and preparation method thereof
  • Environment-friendly composite material capable of realizing sorted recovery of metal, plastic and paper, and preparation method thereof

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 especially relates to an environment-friendly composite material capable of realizing sorted recovery of metal, plastic and paper, and a preparation method thereof, belonging to the field of packaging materials. The composite material successively comprises a first substrate layer, an adhesive layer, a second substrate layer, another adhesive layer and a third substrate layer, wherein each of the first substrate layer, the second substrate layer and the third substrate layer is one independently selected from the group consisting of plastic, metal and paper; the plastic is polyolefin; and the adhesive layers are formed by modified polyglycolic acid. The environment-friendly composite packaging material of the invention utilizes modified polyglycolic acid as the adhesive layers for connection of the substrate layers, and the adhesive layers can be decomposed into low molecular compounds in a natural environment within an appropriate and testifiable period and are finally degraded into water and carbon dioxide completely so as to eliminate connection among the substrate layers such as metal, plastic and paper; and thus, the substrate layers are completely separated, and the effect of sorted collection is achieved. At the same time, 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 Applications(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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