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Thermoplastic starch plastic

A thermoplastic starch and plastic technology, applied in the field of plastics, can solve the problems of poor heat resistance and water resistance, rising product cost, and reduced mechanical properties, and achieves the improvement of heat resistance and water resistance, simple production process, and improved physical properties. Effect

Inactive Publication Date: 2008-11-12
PINGDINGSHAN HUABANG ENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the current ordinary plastics, the fully degradable plastics produced at this stage have poor heat resistance and water resistance, and insufficient physical strength. They are only suitable for the production of disposable products. The wet strength of starch-degradable plastics is poor. The performance is greatly reduced; in order to improve the physical properties of the product, it is necessary to increase the unit mass of the product
[0010] 4. Price
Due to the production process, formula, product unit quality and other reasons, the cost of the product has increased. Compared with the current price of ordinary plastics, its price is 3 to 8 times higher than that of ordinary plastics, which is the main obstacle affecting the entry of environmentally friendly plastic products into the market.

Method used

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  • Thermoplastic starch plastic

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Effect test

Embodiment 1

[0043] Preparation method and production process of the present invention, such as figure 1 Shown:

[0044] First, measure starch 110Kg, glycerin (primary plasticizer) 17.5Kg, maleic anhydride (compatibilizer 1) 20Kg, tert-butyl peroxide (initiator) 0.035Kg and maleic acid di The weight of octyl ester (compatibilizer 2) 3Kg, and carry out mixing and stirring by high-speed kneader, obtain mixed material;

[0045] Then measure the weight of water according to the number of parts by weight, and add 17.5Kg of water and the mixed material into the extruder, and carry out extrusion reaction through the extruder, during which the temperature control range of each interval is between 140 ° C and 160 ° C, Then, after the extrusion reaction, a good grafting effect can be obtained, the material after the extrusion reaction is extruded, cooled and pelletized, and thermoplastic starch masterbatch is obtained;

[0046] Then all the thermoplastic starch masterbatches are stirred with glyce...

Embodiment 2

[0050] Its preparation method and production process, such as figure 1 Shown:

[0051] First, measure starch 120Kg, ethylene glycol (primary plasticizer) 20Kg, maleic anhydride (compatibilizer 1) 10Kg, tert-butyl peroxide (initiator) 0.02Kg and maleic acid according to components and parts by weight The weight of dioctyl ester (compatibilizer 2) 1Kg, and carry out mixing and stirring by high-speed kneader, obtain mixed material;

[0052] Then measure the weight of water according to the number of parts by weight, and add 17.5Kg of water and the mixed material into the extruder, and carry out extrusion reaction through the extruder, during which the temperature control range of each interval is between 140 ° C and 160 ° C, Then, after the extrusion reaction, a good grafting effect can be obtained, the material after the extrusion reaction is extruded, cooled and pelletized, and thermoplastic starch masterbatch is obtained;

[0053] Then all the thermoplastic starch masterbatc...

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Abstract

The invention relates to thermoplastic starch plastics. The preparation compositions, the weight portions and the manufacturing technique are as follows: firstly, 100 kilograms of starch, 17.5 kilograms of primary plasticizer, 3 kilograms of maleic anhydrides, 0.035 kilograms of overoxidized tertiary butyl and 3 kilograms of Di-2-ethylhexyl maleate are taken and mixed; secondly, extrusion reaction is performed on water and mixture together at a temperature of between 140 and 160 DEG C; thirdly, agglomerates are obtained after cooling of the mixture; fourthly, all the agglomerates are mixed with 16.5 kilograms of secondary plasticizer and 0.75 kilograms of glutaric dialdehyde which are taken by weight portion through a high-speed mixing machine, and extrusion reaction is performed subsequently; fifthly, the thermoplastic starch plastics are obtained after cooling and granulation of extruded materials. Compared with the products of the same kind, the thermoplastic starch plastics have low cost and simple manufacturing technique and do not need special amylase extract from starch; the degradation speed is lower than the accumulation speed; the heat resistance, the water resistance and the physical characteristics are obviously improved; the comprehensive cost is close to the common plastic cost; and the condition is created for popularizing completely degraded plastics.

Description

technical field [0001] The invention relates to a plastic, especially a thermoplastic starch plastic. Background technique [0002] Non-degradable plastic products not only continue to consume non-renewable resources - petroleum, but also seriously pollute our living environment. The development and production of non-petroleum-based polymers and the development of biodegradable plastics have become a hot topic of social concern and technical research in the industry. [0003] Biodegradable plastics refer to polymer materials that can be completely biodegraded under certain conditions under the action of microorganisms (such as fungi and molds) that can secrete enzymes. It can be divided into biodestructive plastics and completely biodegradable plastics. Although my country attaches great importance to the development of biodegradable plastic products, it still mainly produces W (starch) = 7% to 30% starch-filled plastics. This starch-filled plastic belongs to biodegradable ...

Claims

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Application Information

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IPC IPC(8): C08L51/02C08K5/00C08K5/053C08K5/07C08K5/09C08F251/00B29B9/12B29C47/92B29C48/92
CPCB29C47/92B29C48/04B29C48/92B29C2948/92704B29C2948/92895
Inventor 李新发陈金周刘成任艳丽田凤英
Owner PINGDINGSHAN HUABANG ENG PLASTIC
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