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Total-biodegradation plastic film and preparation method thereof

A plastic film, biodegradable technology, applied in flat products, applications, household appliances, etc., can solve problems such as unsatisfactory processing performance, adverse effects on product mechanical properties, etc., and achieve low biodegradability, excellent mechanical properties, and cost reduction. Effect

Inactive Publication Date: 2008-08-13
上海悦仕生物材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can realize the complete biodegradation of plastic products, and has good physical and mechanical properties and good adaptability. cause certain adverse effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Composition of raw materials: thermoplastic corn starch 60 (parts by weight, the same below)

[0039] PLA 25

[0040] octadecenoic acid 8

[0041] calcium carbonate 4

[0042] Glycerin / ethylene glycol mixture (1:1) 28

[0043] Stearic acid amide 22

[0044] The above-mentioned thermoplastic corn starch, polylactic acid, octadecenoic acid, calcium carbonate, glycerin / ethylene glycol mixture, and less than 1 / 3 of the total amount of stearic acid amide are mixed and modified with reference to the method described in CN1778833A to obtain a particle size of 1 After the thermoplastic starch material of ~9 μm is melted, extruded and granulated with a banburying three-screw extruder, the remaining stearic acid amide is added in the ninth zone of the banburying three-screw extruder. The temperature settings of each zone of the banburying three-screw extruder are:

[0045] Zones one to three are 100°C-130°C, zones four to six...

Embodiment 2

[0049] Raw material composition: thermoplastic tapioca starch 45

[0050] Polyvinyl alcohol 40

[0051] Dodecenylsuccinic anhydride 7

[0052] Clay 4.5

[0053] Dibutyl phthalate 5

[0054] Methylene bis stearamide 20

[0055] Operate in the manner of Example 1. Among them, the aspect ratio of the electromagnetic dynamic film blowing machine is 25, and the working parameters are: temperature 120 ℃ ~ 180 ℃, host speed 300r / min, vibration frequency 50Hz.

Embodiment 3

[0057] Raw material composition: thermoplastic konjac starch 70

[0058] Polycaprolactone 35

[0059] Undecenylsuccinic anhydride 5

[0060] Montmorillonite 5

[0061] Sorbitol 15

[0062] Ethylene bis stearamide 25

[0063] Operate in the manner described in Example 1. Among them, the aspect ratio of the electromagnetic dynamic film blowing machine is 28, and the working parameters are: temperature 120 ℃ ~ 180 ℃, host speed 250r / min, vibration frequency 35Hz.

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Abstract

A full-biodegradable plastic membrane, which uses thermoplastic starch with diameter of 1-9 mu m, biodegradable polymer and auxiliary component as raw material, processed by screw extruding apparatus and membrane producing apparatus. The raw material comprises 30-70 parts by weight of thermoplastic starch with diameter of 1-9 mu m, 10-40 parts by weight of biodegradable polymer, 5-10 parts by weight of compatible modified component, 3-5 parts by weight of complex plasticized component, 10-30 parts by weight of lubricant. These materials are mixed and processed by screw extruding apparatus and membrane producing apparatus, wherein the lubricant is at least adding into other materials for mixture before process by screw extruding apparatus and during melt blending, and the adding amount of lubricant before process by screw extruding apparatus is not more than 1 / 3 of the total amount thereof. By highly increasing dosage of lubricant and changing mixing way, thermoplastic degree of starch is increased, rheological property of the system and processing quality of product are dramatically improved, mechanical property of the product is enhanced.

Description

technical field [0001] The invention relates to a fully biodegradable plastic film, specifically a fully biodegradable plastic film containing thermoplastic starch components, and a corresponding preparation method thereof. Background technique [0002] The environmental problems caused by the production and use of non-degradable plastic products have become increasingly apparent, and have attracted great attention from the whole society. [0003] A Chinese patent document with publication number CN1778833A provides a fully biodegradable starch / polyester plastic and a preparation method thereof. The plastic is composed of thermoplastic starch with a particle size of 1-9 μm, aliphatic-aromatic block blended polyester, long-chain unsaturated carboxylic acid or acid anhydride graft modified components, organic peroxide initiator, and polyol ester compound. Plasticizers, organic compounds or polyol stabilizers and lubricants are used as raw materials. After the starch is mechan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/00C08K13/02C08J5/18B29C47/92B29C55/28C08K5/20B29C69/02B29L7/00B29C48/92
Inventor 陈庆曹费郭林杨欣宇
Owner 上海悦仕生物材料有限公司
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