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Biodegradable material and preparation method thereof

A technology of biodegradable materials and mixtures, applied in the field of biodegradable materials and their preparation, can solve the problems of high production cost, hinder the promotion and application of materials, low transparency, etc., and achieve the effect of good mechanical properties

Active Publication Date: 2013-04-17
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many researches and reports on biodegradable materials at home and abroad, there are still many problems hindering the promotion and application of such materials.
The reasons are: 1) The mechanical properties of degradable plastics are poor, which cannot meet the requirements of users; 2) The color of degradable materials is dull and yellowish, and the transparency is low; 3) The price is high, and the cost is higher than the production cost of ordinary polymer materials.

Method used

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  • Biodegradable material and preparation method thereof
  • Biodegradable material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: Various raw materials were weighed according to the raw material formula in Table 1, wherein PVA resin, starch and PBS resin were pre-dried for 4 hours. Add PVA resin, starch, glycerol, deionized water, and citric acid to a high-speed mixer and mix at high speed for 30 minutes. During the whole process, keep the temperature of the material at 110°C. After mixing, adjust the temperature of the high-speed mixer to 70°C until the temperature is stable. Then add PBS resin and maleic anhydride, mix for 20 minutes, discharge at a low speed, and use a twin-screw extruder for melt extrusion and granulation. The specific setting of the twin-screw heating temperature section is as follows: the first zone: 120°C, the second zone: 135°C, the third zone: 140°C, the fourth zone: 155°C, the fifth zone: 155°C, the sixth zone: 160 ℃, zone 7: 160℃, zone 8: 155℃.

Embodiment 2

[0044] Embodiment 2: The preparation method of embodiment 2 is the same as that of embodiment 1, and the specific raw material ratio is shown in Table 1.

Embodiment 3

[0045] Embodiment 3: The preparation method of embodiment 3 is the same as that of embodiment 1, and the specific raw material ratio is shown in Table 1.

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Abstract

The invention discloses a biodegradable material and a preparation method thereof. The biodegradable material comprises the following components in parts by weight: 10-50 parts of starch, 5-20 parts of polyvinyl alcohol, 10-50 parts of poly butylenes succinate, 5-20 parts of plasticizer, 0.5-5 parts of compatilizer, and 0.1-0.5 parts of antioxygen. The biodegradable material can be subjected to direct extrusion molding, injection molding and blow molding, can be applied to products such as containers, packaging bags, and external packaging of consumer goods, can keep good mechanical properties within a longer usage period, can be composted after recovered and finally degraded to carbon dioxide and water, and has no pollution to an environment.

Description

technical field [0001] The embodiment of the present invention relates to a biodegradable material and a preparation method thereof. Background technique [0002] "White pollution" has become a serious social problem, and how to deal with plastic waste has become a matter of great concern to all mankind. Whether in the Americas, Europe or Africa, many countries are introducing various plastic restriction policies, and one of the more common practices is to use alternative degradable products. France's 2010 ban on the sale and distribution of all-plastic bags and plastic packaging unless they are fully biodegradable has sparked a strong reaction from the industry. There is an upsurge of biodegradable materials in the world. Since the end of the 20th century, degradable plastics have developed rapidly. In North America, degradable plastics have grown at a rate of 17% per year; in Europe, they have grown at a rate of 59% per year. [0003] The Chinese government has also pro...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L29/04C08L67/02C08K13/02C08K5/053C08K3/20C08K5/092B29C47/92B29C48/92
CPCB29C48/0022B29B9/06B29B9/12B29B7/7461B29B7/92B29B7/48B29B7/82B29B7/007
Inventor 纪敏陈伟周刚王炼雷春堂张亚萍林晓艳
Owner SICHUAN CHANGHONG ELECTRIC CO LTD