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Preparation method of completely biodegradable plastic resin and film products thereof

A technology for biodegradable plastics and resins, applied in the field of degradable plastics, can solve the problems of low wet strength and poor plastic molding, and achieve the effect of improving tensile strength and elongation at break

Inactive Publication Date: 2012-09-05
上海可伊实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Including starch, cellulose, chitosan, protein and lignin, these materials are derived from substances grown in nature. Advantages: abundant resources, recyclable, inexhaustible and low price. Disadvantages: low wet strength, plastic molding not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] Weigh 10Kg of cornstarch and 2Kg of glycerin, add them into a high-speed mixer and mix for 1 hour, and set the temperature at 92°C. Then the mixture was sealed in a plastic bag and left for 24 hours, and mixed by an internal mixer at a temperature of 120° C., and mixed for 20 minutes to obtain modified starch.

[0024] Then, it is plasticized and extruded in a single-screw extruder, the temperature is controlled at 145° C., and the rotational speed is controlled at 60 r / min, extruded and granulated.

[0025] After 10Kg of modified starch meets the requirements of plasticizing effect, it is blended with 10Kg of polybutylene succinate PBS, 50Kg of fully degradable starch-based resin, 0.2Kg of polyvinyl alcohol is added, and heat stabilizer stearate is added. Zinc acid 0.2Kg, antioxidant 2,6-di-tert-butyl-4-methylphenol 0.1Kg, and silane coupling agent 0.1Kg.

[0026] A fully biodegradable plastic film is produced by extrusion blow molding. The processing conditions of b...

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PUM

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Abstract

The invention relates to a preparation method of a completely biodegradable plastic resin and film products thereof. The preparation method is realized through the following steps: conducting surface treatment on starch with content controlled to be 90% by taking corn starch, sweet potato starch, tapioca, konjac starch, poly(butylene succinate) (PBS), various plastic additives and the like as raw materials, and blending the starch with biodegradable synthetic resin (PBS, PLA (polylactic acid)) for modification; and adopting film blowing, extrusion and other technologies to obtain corresponding products. The preparation method has the beneficial effects that on the premise of maintaining the product to be completely biodegradable, the tensile strength and elongation at break of the product can be improved, so that the product truly conforms to the market demand.

Description

technical field [0001] The invention relates to a method for degradable plastics, in particular to a method for completely biodegradable plastic resins and film products thereof. Background technique [0002] Since polymer materials were synthesized and put into use in the 1930s, plastics have been widely used in various sectors of the national economy and in various fields of people's lives due to their special qualities of light weight, durability, low price and high quality. However, the natural degradation time is long, which causes serious "white pollution". Incineration can recover energy, but the investment in equipment is large, and it is easy to produce toxic gases, which increases the greenhouse effect and forms secondary pollution; recycling can better solve plastics Garbage pollution problem, but this method has high operating cost, high technical difficulty, and difficult to guarantee product quality. [0003] Degradable plastics are a type of plastics that can...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L67/02C08L29/04C08L75/04C08K5/053C08K5/098C08K5/13B29B9/06B29C47/92B29C55/28B29C48/92
CPCB29C48/10B29C48/04B29C48/397B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 徐羽展
Owner 上海可伊实业有限公司
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