Low-cost high-biology-base full-biodegradable multi-layer coextrusion film for waistcoat pocket and preparation method of coextrusion film

A multi-layer co-extrusion, low-cost technology, applied in the field of fully biodegradable materials, can solve the problems of too soft film texture, high film cost, limited wide application, etc., achieve low cost, obvious cost advantage, and make up for the effect of being too soft

Inactive Publication Date: 2019-02-22
束建军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, polylactic acid (PLA) has high mechanical strength, and can prepare fully biodegradable films with excellent comprehensive properties after toughening or plasticizing modification, but the high cost of this film severely limits its further wide application.
In comparison, the starch-based fully biodegradable film has an obvious price advantage, but the texture of this film is too soft, and it is very difficult to make a vest bag with it

Method used

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  • Low-cost high-biology-base full-biodegradable multi-layer coextrusion film for waistcoat pocket and preparation method of coextrusion film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The upper and lower layers of the low-cost high bio-based fully degradable multi-layer co-extrusion film for vest bags are composed of the following mass fractions of raw materials:

[0026] 70 parts of PLA, 30 parts of PBAT, 0.2 parts of ethylene-maleic anhydride copolymer, 5 parts of ethylene-vinyl acetate copolymer, 0.2 parts of erucamide, 0.15 parts of nano silicon dioxide, 0.1 part of antioxidant 1010, antioxidant 168 0.2 parts.

[0027] The middle layer is composed of raw materials with the following mass fractions:

[0028] 50 parts of PBAT, 40 parts of corn starch, 0.4 parts of zinc stearate, 4.8 parts of glycerin, 2.8 parts of diethylene glycol, 2 parts of sorbitol, 0.8 parts of citric acid, 3.2 parts of ethylene-acrylic acid copolymer, dibenzoyl peroxide 0.05 part, 0.1 part of oleic acid amide.

[0029] The preparation method of the vest bag with low cost and high bio-based fully degradable multi-layer co-extruded film comprises the following steps:

[0030...

Embodiment 2

[0035] The upper and lower layers of the low-cost high bio-based fully degradable multi-layer co-extrusion film for vest bags are composed of the following mass fractions of raw materials:

[0036] 60 parts of PLA, 40 parts of PBAT, 0.2 parts of ethylene-maleic anhydride copolymer, 5 parts of ethylene-vinyl acetate copolymer, 0.2 parts of erucamide, 0.15 parts of nano silicon dioxide, 0.1 part of antioxidant 1010, antioxidant 168 0.2 parts.

[0037] The middle layer is composed of raw materials with the following mass fractions:

[0038] 55 parts of PBAT, 35 parts of corn starch, 0.4 parts of zinc stearate, 4.8 parts of glycerin, 2.8 parts of diethylene glycol, 2 parts of sorbitol, 0.8 parts of citric acid, 3.2 parts of ethylene-acrylic acid copolymer, dibenzoyl peroxide 0.05 part, 0.1 part of oleic acid amide.

[0039] The preparation method of the vest bag with low cost and high bio-based fully degradable multi-layer co-extruded film comprises the following steps:

[0040...

Embodiment 3

[0045] The upper and lower layers of the low-cost high bio-based fully degradable multi-layer co-extrusion film for vest bags are composed of the following mass fractions of raw materials:

[0046] 55 parts of PLA, 45 parts of PBAT, 0.1 part of ethylene-maleic anhydride copolymer, 3 parts of ethylene-vinyl acetate copolymer, 0.2 part of erucamide, 0.15 part of nano silicon dioxide, 0.1 part of antioxidant 1010, antioxidant 168 0.2 parts.

[0047] The middle layer is composed of raw materials with the following mass fractions:

[0048] 60 parts of PBAT, 30 parts of corn starch, 0.3 parts of zinc stearate, 3.6 parts of glycerin, 2.1 parts of diethylene glycol, 1.5 parts of sorbitol, 0.6 parts of citric acid, 2.4 parts of ethylene-acrylic acid copolymer, dibenzoyl peroxide 0.05 part, 0.1 part of oleic acid amide.

[0049] The preparation method of the vest bag with low cost and high bio-based fully degradable multi-layer co-extruded film comprises the following steps:

[0050]...

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Abstract

A polylactic acid/polyadipate-butylene terephthalate (PLA/PBAT) modified material and a polyadipate-butylene terephthalate/thermoplastic starch (PBAT/TPS) modified material which can meet the blow molding requirement are prepared through melting reaction in a blending manner based on a multi-element blending modification technique of fully biodegradable materials; and a full-biodegrade three-layercoextrusion film is prepared by virtue of a multilayer coextrusion technique, the upper and lower layers are PLA/PBAT modified films, and the middle layer is a PBAT/TPS modifying film. The biology base content of the film can reach up to over 50%, the tensile strength is higher than that of a traditional PE film, the cost is relatively low, and the film has very important significances to the solving of ''white pollution'' problem and the promotion of the application of a full-biodegrade material in the field of waistcoat pockets.

Description

technical field [0001] The invention belongs to the technical field of fully biodegradable materials, and relates to a fully biodegradable film suitable for making vest bags, in particular to a low-cost, high bio-based fully degradable multi-layer co-extruded film and a preparation method thereof. Background technique [0002] The birth of plastic vest bags has brought great convenience to people's lives. However, with the increasing usage year by year, a large number of discarded plastic vest bags have caused serious "white pollution" to our environment. In addition, traditional plastic vest bags are made of petroleum-based PE, so a large number of discarded vest bags is also a great waste of petroleum resources. [0003] From the perspective of long-term development, promoting the use of fully biodegradable materials is considered to be the most fundamental and effective way to solve the problem of "white pollution". In recent years, fully biodegradable materials, especi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/36B32B27/20B32B27/28B32B33/00B32B37/15C08L67/04C08L67/02C08K13/02C08K5/20C08K3/36C08L3/02C08K5/00C08K5/098C08K5/053C08K5/06
CPCB32B27/08B32B27/20B32B27/28B32B27/36B32B33/00B32B37/153B32B2250/24B32B2307/558B32B2439/06C08K2201/011C08K2201/014C08L67/02C08L67/04C08L2201/06C08L2205/02C08L2205/03C08L2205/035C08K13/02C08K5/20C08K3/36C08L3/02C08K5/00C08K5/098C08K5/053C08K5/06
Inventor 束建军
Owner 束建军
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