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Starch-polyvinyl alcohol dual-degradationplastic film

A polyvinyl alcohol and plastic film technology, applied in the field of film production, can solve the problems of poor water resistance, slow degradation speed, insoluble, etc., and achieves the effect of solving the problem of white pollution, being beneficial to industrial production, and having a simple production process.

Active Publication Date: 2014-10-22
ANHUI CHAOHU SOUTH MEMBRANE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the starch molecular chain contains a large number of hydroxyl groups, which are easy to form hydrogen bonds inside and outside the molecular chain, so it is insoluble, infusible, and has poor water resistance. It is easy to absorb water when exposed to water or stored in humid air for a long time, affecting its stability. sex
[0003] At present, there have been many reports on the research of starch-polyvinyl alcohol-based fully biodegradable plastic films, but the prepared starch-polyvinyl alcohol-based degradable plastics still have slow degradation rates, and the relative differences between starch and polyvinyl alcohol-based polymers Problems such as poor compatibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 50 parts of starch, 15 parts of polyvinyl alcohol, 5 parts of artemisia gum, 2 parts of hydroxypropyl cellulose, 5 parts of pullulan, 3 parts of nano silicon dioxide, 5 parts of zinc stearate, 4 parts of oxidized polyethylene wax 2 parts, ethyl silicone oil 2 parts, calcium carbonate 3 parts, glutaraldehyde 4 parts, stearyl alcohol 3 parts.

Embodiment 2

[0019] 60 parts of starch, 20 parts of polyvinyl alcohol, 7 parts of artemisia gum, 5 parts of hydroxypropyl cellulose, 7 parts of pullulan, 4 parts of nano silicon dioxide, 7 parts of zinc stearate, 6 parts of oxidized polyethylene wax Parts, 5 parts of ethyl silicone oil, 4 parts of calcium carbonate, 7 parts of glutaraldehyde, 4 parts of stearyl alcohol.

Embodiment 3

[0021] 65 parts of starch, 30 parts of polyvinyl alcohol, 10 parts of artemisia gum, 8 parts of hydroxypropyl cellulose, 10 parts of pullulan, 6 parts of nano silicon dioxide, 10 parts of zinc stearate, 8 parts of oxidized polyethylene wax Parts, 7 parts of ethyl silicone oil, 5 parts of calcium carbonate, 10 parts of glutaraldehyde, 5 parts of stearyl alcohol.

[0022] The starch used is one of corn starch, wheat starch, oat starch, barley starch, tapioca starch, potato starch, buckwheat starch and soybean flour.

[0023] The particle size of the used nano silicon dioxide is 20-100nm.

[0024] Adopt the raw material formula of embodiment 1-3 to prepare the operation steps of starch-polyvinyl alcohol double degradable plastic film as follows:

[0025] Step a: put starch, carboxypropyl cellulose, glutaraldehyde, 1 / 3-1 / 2 oxidized polyethylene wax and 1 / 4-1 / 3 polyvinyl alcohol into an oven to dry, and then The biodegradable masterbatch is obtained after twin-screw extruder extr...

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Abstract

The invention discloses a starch-polyvinyl alcohol dual-degradationplastic film, and relates to the technical field of film production. The starch-polyvinyl alcohol dual-degradation plastic film is made by using the following raw materials, by mass, 50-65 parts of starch, 15-30 parts of polyvinyl alcohol, 5-10 parts of Sa-son seed gum, 2-8 parts of hydroxy propyl cellulose, 5-10 parts of pulullan polysaccharide, 3-6 parts of nanometer silica, 5-10 parts of zinc stearate, 4-8 parts of oxidized polyethlene wax, 2-4 parts of ethyl silicon oil, 3-5 parts of calcium carbonate, 4-10 parts of glutaraldehyde and 3-5 parts of octodecyl alcohol. The plastic film made in the invention has biological and optical degradation effects, can effectively solve the white pollution problem caused by difficult degradation of common plastic films, and has the advantages of simple production technology, low cost and industrial production benefiting.

Description

Technical field: [0001] The invention relates to the technical field of film production, in particular to a starch-polyvinyl alcohol double-degradable plastic film. Background technique: [0002] In order to solve the environmental pollution caused by plastic film products such as packaging bags and garbage bags, researchers at home and abroad have been devoting themselves to the development of plastic films that do not pollute the environment. Biodegradable plastic film materials include synthetic materials and natural polymer materials, and natural polymer materials are particularly attractive due to their abundant and renewable resources. However, the starch molecular chain contains a large number of hydroxyl groups, which are easy to form hydrogen bonds inside and outside the molecular chain, so it is insoluble, infusible, and has poor water resistance. It is easy to absorb water when exposed to water or stored in humid air for a long time, affecting its stability. sex....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L29/04C08L1/26C08L5/00C08L83/04C08K13/02C08K3/36C08K5/098C08K3/26C08K5/07C08K5/05C08J5/18
Inventor 武道贵
Owner ANHUI CHAOHU SOUTH MEMBRANE IND
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