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A thermoplastic starch-polyvinyl alcohol composite plastic film

A technology of thermoplastic starch and polyvinyl alcohol, which is applied in the field of thermoplastic starch-polyvinyl alcohol composite plastic film, can solve the problems of starch use limitation, difficult casting and molding, poor mechanical properties of products, etc., achieve low production cost, simple preparation method, The effect of improving mechanical properties

Active Publication Date: 2016-04-27
ANHUI CHAOHU SOUTH MEMBRANE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the disadvantages of difficult casting and poor mechanical properties of the product, the use of starch is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Thermoplastic starch (self-made) 80 parts, polyvinyl alcohol 40 parts, acrylic acid 10 parts, benzoyl peroxide 5 parts, oxidized polyethylene wax 7 parts, hydroxyethyl cellulose 4 parts, calcium stearate 5 parts, iron oxide 5 parts, 3 parts gelatin, 5 parts urea, 8 parts polyethylene glycol.

Embodiment 2

[0017] Thermoplastic starch (self-made) 90 parts, polyvinyl alcohol 50 parts, acrylic acid 12 parts, benzoyl peroxide 8 parts, oxidized polyethylene wax 10 parts, hydroxyethyl cellulose 6 parts, calcium stearate 8 parts, iron oxide 10 parts, 4 parts gelatin, 7 parts urea, 10 parts polyethylene glycol.

Embodiment 3

[0019] Thermoplastic starch (self-made) 100 parts, polyvinyl alcohol 55 parts, acrylic acid 15 parts, benzoyl peroxide 10 parts, oxidized polyethylene wax 12 parts, hydroxyethyl cellulose 8 parts, calcium stearate 12 parts, iron oxide 15 parts, 6 parts gelatin, 10 parts urea, 15 parts polyethylene glycol.

[0020] The thermoplastic starch used is one of thermoplastic corn starch, thermoplastic wheat starch, thermoplastic oat starch, thermoplastic barley starch, thermoplastic tapioca starch, thermoplastic potato starch, thermoplastic buckwheat starch, and thermoplastic soybean flour.

[0021] The preparation method of thermoplastic starch is: mix starch with water, glycerin, and urea in a high-speed mixer, then put it in an internal mixer with a rotation speed of 100r / min and a temperature of 120-140°C for 20 minutes, and then use a double-roller to knead The plastic machine starts kneading at 150°C, compresses into tablets, and after cooling, it is crushed into fine particles ...

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PUM

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Abstract

The invention discloses a thermoplastic starch-polyvinyl alcohol composite plastic film, and relates to the technical field of film production. The composite plastic film is made by using the following raw materials, by mass, 80-100 parts of (self-made) thermoplastic starch, 40-55 parts of polyvinyl alcohol, 10-15 parts of acrylic acid, 5-10 parts of benzoyl peroxide, 7-12 parts of oxidized polyethylene wax, 4-8 parts of hydroxyethyl cellulose, 5-12 parts of calcium stearate, 5-15 parts of iron oxide, 3-6 parts of gelatin, 5-10 parts of urea, and 8-15 parts of polyethylene glycol. The composite plastic film made in the invention reserves the good biodegradation performance of starch and effectively improves the mechanical performances of a plastic film, and a covalent bond introduced due to the addition of a cross-linking agent can substitute a hydrogen bond in order to improve the mutual crosslinking among starch, polyvinyl alcohol and other raw material molecules.

Description

Technical field: [0001] The invention relates to the technical field of film production, in particular to a thermoplastic starch-polyvinyl alcohol composite plastic film. Background technique: [0002] Biodegradable plastic film refers to a polymer material that can be completely biodegraded under certain conditions under the action of microorganisms that can secrete enzymes. It can be divided into biodestructive plastics and completely biodegradable plastics. The most promising one is whole starch. Plastic film, this kind of plastic film can be completely biodegraded after use, produces carbon dioxide and water, and does not pollute the environment. It is the main direction of research on starch-degradable plastic film at home and abroad in recent years. However, starch is difficult to cast and has poor mechanical properties, etc., so that the use of starch is limited. Therefore, starch must undergo surface physical or chemical modification before it can be used as a mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L29/04C08L1/26C08L89/00C08L71/08C08L23/30C08K13/02C08K5/09C08K5/14C08K5/098C08K3/22C08K5/21C08J3/24C08J5/18
Inventor 武道贵
Owner ANHUI CHAOHU SOUTH MEMBRANE IND