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Nontoxic whole-degradable plastics and process for making same

A fully degradable plastic technology, applied in the field of non-toxic fully degradable plastics and its preparation, can solve the problems of not meeting the technical requirements of fully degradable, slow degradation, affecting material development, etc.

Inactive Publication Date: 2005-09-14
杨凌沃林国际降解树脂发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance difference of thermoplastic starch materials is directly related to the type and amount of organic polymers introduced, and the types of processing aids introduced, which makes many varieties fail to meet the technical requirements of full degradation, or degrades slowly, thus affecting the quality of such materials. development of

Method used

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  • Nontoxic whole-degradable plastics and process for making same

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Experimental program
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Effect test

Embodiment 1

[0016] a. Add starch, vegetable protein powder, polyvinyl alcohol, polyglutamic acid, xylitol, and glycerol into a high-speed mixer, and stir and mix evenly at room temperature. The proportioning of each added component is: 50 parts of starch, 5 parts of vegetable protein powder, 15 parts of polyvinyl alcohol, 10 parts of polyglutamic acid, 5 parts of xylitol and 8 parts of glycerin.

[0017] b. Add the above-mentioned components to the twin-screw extruder, heat and extrude in the twin-screw extruder. The heating of the twin-screw extruder is carried out in the barrel, and the heating is carried out by segmental temperature control. The temperature of each segment is 100°C, 125°C, 150°C, 160°C, 120°C, and 120°C.

[0018] c. The material extruded from the die head is cooled, dragged and granulated to form fully degradable plastic pellets.

[0019] d. The above-mentioned fully degradable plastic pellets can also be made into sheets by an extrusion molding machine at a temperatu...

Embodiment 2

[0023] The ratio of the added components can also be: 60 parts of starch, 10 parts of vegetable protein powder, 20 parts of polyvinyl alcohol, 10 parts of polyglutamic acid, 8 parts of xylitol, and 12 parts of glycerol.

[0024] The non-toxic and fully degradable plastic pellets obtained through the process of the present invention, as well as various degradable plastic products obtained through general plastic molding processing methods, have the particularity of performance and the universality of plastic molding processing Combined and less expensive. These advantages and characteristics create favorable conditions for its popularization and use.

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Abstract

This invention relates to a nontoxic full degradation plastic and its preparation method. It is made mainly by starch, polyvinyl alcohol, vegetable protein powder, polyglutamic acid, xylitol, glycerin. The preparation method is that a. starch, polyvinyl alcohol, vegetable protein powder, polyglutamic acid, xylitol, glycerin are added into amalgamator, then agitated to equality under room temperature. b. the equally mixed mixture is heated and extruded in twin screw extruder. c. nontoxic full degradation plastic particle is made after the particle extruded from die head cooling and draughting and granulating. The capability particularityof nontoxic full degradation plastic particle made trough this invention and other common capability of common plastic bolding can be combined and its price is cheap. The features and advantages make advantaged condition for its extending use.

Description

Technical field: [0001] The invention relates to a non-toxic fully degradable plastic and a preparation method thereof, which is mainly made of starch, vegetable protein powder, polyvinyl alcohol, polyglutamic acid, xylitol, glycerol and the like. Background technique: [0002] Human beings' awareness of environmental protection has been continuously strengthened, and the pollution caused by packaging materials such as plastics and the pollution of agricultural films have attracted widespread attention. To eliminate the harm caused by such pollution, research, produce and use non-toxic and fully degradable Polymers have become one of the research and development hotspots of scientists from all over the world. Non-toxic and fully degradable polymers that have been studied very effectively today include polylactic acid, poly-3-hydroxybutyrate, and thermoplastic starch materials. However, polylactic acid and poly-3-hydroxybutyrate have complex synthetic techniques and are expe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02
Inventor 李郁忠彭祖辰谭卫红王廷瑞
Owner 杨凌沃林国际降解树脂发展有限公司
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