Novel polylactic acid and starch compound fully-degradable plastic film and manufacturing method thereof

A technology of plastic film and polylactic acid, which is applied in the field of plastic film, can solve the problems of poor compatibility with polylactic acid, achieve the effect of improving interface contact effect and compatibility, good toughness and mechanical properties, and reducing overall cost

Inactive Publication Date: 2016-09-28
ANHUI MENGNIU COLOR PRINTING&PACKAGING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the present invention, the silane coupling agent kh-550 is used to pretreat the hemp fiber, thereby improving the interface contact effect and compatibility, and improving the mechanical properties of the material; then modifying the cornstarch through a series of processes and adding In the overall product, it solves the problem of poor compatibility with polylactic acid, improves the strength and toughness of the composite material, and can greatly reduce the overall cost of the product, which is conducive to the promotion and application of fully biodegradable plastics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] specific implementation plan

[0017] The present invention will be described in detail below through specific examples.

[0018] A new polylactic acid starch composite fully degradable plastic film, prepared from the following raw materials in parts by weight (kg): polylactic acid 80, corn starch 20, glycerin 12, epichlorohydrin 1.6, 1mol / L sodium hydroxide Appropriate amount of solution, appropriate amount of 1mol / L hydrochloric acid, appropriate amount of distilled water, hemp fiber 25, silane coupling agent kh-550 0.8, talcum powder 2;

[0019] A novel polylactic acid starch composite fully degradable plastic film described in the present invention is made by the following specific steps:

[0020] (1) Put the hemp fiber into a double amount of 1mol / L sodium hydroxide solution, heat it to 100°C under normal pressure, cook for 2.5 hours, take it out after cooling, wash it with 1mol / L hydrochloric acid until neutral, Put it in an oven for drying, put it into a pulver...

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Abstract

The invention discloses a novel polylactic acid and starch compound fully-degradable plastic film, which is characterized by being made from the following raw materials, by weight part, 80-85 of polylactic acid, 20-25 of corn starch, 12-14 of glycerin, 1.6-2 of epichlorohydrin, a proper amount of a sodium hydroxide solution with the concentration being 1 mol / L, a proper amount of hydrochloric acid with the concentration being 1 mol / L, a proper amount of distilled water, 25-30 of hemp fibers, 0.8-1 of a silane coupling agent kh-550 and 2-3 of talcum powder. The fully-degradable plastic film is excellent in toughness and mechanical properties, is easy to degrade under a natural condition and is safe and eco-friendly. The method is innovative in technology and convenient for industrial control. The film can be used as food package bags, preservative films, and the like.

Description

technical field [0001] The invention relates to the technical field of plastic films, in particular to a novel polylactic acid starch composite fully degradable plastic film and a preparation method thereof. Background technique [0002] In order to reduce the use of petroleum-based plastic materials, protect the environment, and alleviate the increasingly severe shortage of petroleum resources, the development and utilization of bio-based degradable and environmentally friendly plastic materials has become the focus of research in the field of packaging materials. [0003] Polylactic acid material is one of the most widely used degradable plastic materials at present. As a packaging film material, PLA has good transparency, mechanical properties and biocompatibility, high strength, thermoplasticity, hydrophobicity, easy molding and processing, and can be completely Degradation, the degradation products are non-toxic and harmless to the human body, come from renewable resour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02C08L3/08C08K3/34C08K5/053C08J5/06C08J3/22C08B31/12
CPCC08B31/12C08J3/226C08J5/045C08J5/06C08J5/18C08J2367/04C08J2403/08C08J2497/02C08L67/04C08L2201/06C08L2203/16C08L2205/03C08L2205/16C08L97/02C08L3/08C08K3/34C08K5/053
Inventor 李峰郑志龙
Owner ANHUI MENGNIU COLOR PRINTING&PACKAGING
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