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Biodegradable composition, and its preparing method and foamed product

A biodegradable and composite technology, applied in the field of foaming products, can solve the problems of poor expansion ratio and compressive strength, poor resilience of open-cell foam, and achieve good expansion ratio and compressive strength, high mold The effect of degradable grade and high biodegradation rate

Inactive Publication Date: 2007-03-28
李小鲁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because the composition forms a large number of open-cell foams in the process of foam molding, the resilience of the open-cell foam is poor, so it is not suitable for the preparation of foamed products or foamed products. Poor expansion ratio and compressive strength

Method used

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  • Biodegradable composition, and its preparing method and foamed product
  • Biodegradable composition, and its preparing method and foamed product
  • Biodegradable composition, and its preparing method and foamed product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This example is used to illustrate the preparation of the biodegradable composition of the present invention.

[0047] (1) 30 parts by weight of starch phosphate monoester (produced by Beijing Quanxing Starch Factory; the number average molecular weight is 200000, and the degree of substitution is 1.0), 56 parts by weight of polylactic acid (ECO-PLA produced by Kaji Company; at 190°C The melt index is 10 grams / 10 minutes), 7 parts by weight sorbitol, 3.5 parts by weight glycerin, 0.8 parts by weight zinc stearate, 0.2 parts by weight calcium stearate, 0.5 parts by weight epoxy soybean oil add in mixer Stir evenly at room temperature. The mixer first mixes at a low speed of 100 rpm for about 7 minutes, and then mixes at a high speed of 200 rpm for 8 minutes;

[0048] (2) The above-mentioned uniformly stirred mixture is sent into a twin-screw extruder, the length-to-diameter ratio of the extruder is L:D=48:1, and the screw diameter is Φ75 mm. Adjust the screw speed to gr...

Embodiment 2

[0051] This example is used to illustrate the preparation of the biodegradable composition of the present invention.

[0052] (1) 70.0 parts by weight of starch sulfate (dry basis weight) (produced by Beijing Quanxing Starch Factory; the number average molecular weight is 150000, and the degree of substitution is 0.5), 20 parts by weight of polylactic acid (2002D produced by Nature Company; at 190 The melt index at ℃ is 20 grams / 10 minutes), 5 parts by weight of sorbitol, and 1 part by weight of glycerin are added in the blender and stirred evenly at room temperature. RPM high-speed mixing for 6 minutes;

[0053] (2) The above-mentioned uniformly stirred mixture is sent into a twin-screw extruder, the length-to-diameter ratio of the extruder is L:D=48:1, and the screw diameter is Φ75 mm. Adjust the screw speed to gradually increase from 100 rpm to 200 rpm, 300 rpm, 400 rpm, 500 rpm, 700 rpm, 900 rpm, and control the temperature of each section separately At 150°C, 165°C, 165...

Embodiment 3

[0056] This embodiment is used to illustrate the preparation of the biodegradable composition of the present invention

[0057] (1) 50.0 parts by weight (dry weight) of starch acetate (produced by Beijing Quanxing Starch Factory; the number average molecular weight is 190000, and the degree of substitution is 1.5), 30 parts by weight of polylactic acid (ECO-PLA produced by Kaji Company; The melt index at 190°C is 5 g / 10 minutes), 7 parts by weight of sorbitol, 10 parts by weight of glycerin, 1 part of zinc stearate, 0.5 parts of calcium stearate, 0.5 parts by weight of Beijing Tin 8831, 0.5 parts by weight Add one part of antioxidant DSTP into the mixer and stir evenly at room temperature. The mixer first mixes at a low speed of 80 rpm for about 5 minutes, and then mixes at a high speed of 15 rpm for 6 minutes;

[0058] (2) The above-mentioned uniformly stirred mixture is sent into a twin-screw extruder, the length-to-diameter ratio of the extruder is L:D=48:1, and the screw d...

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Abstract

The invention relates to biodegradable combination which contains starch that is esterifying starch and / or etherified starch with 0.1-3 degree of substitution, poly lactic acid, polyhydric alcohol, and foaming agent. The foaming series products formed by the combination have good expansion ratio, compressive strength, high biodegradation rate, and mold degrading stage.

Description

technical field [0001] The present invention relates to a starch-containing resin composition and a preparation method thereof, in particular to a biodegradable composition, a preparation method thereof and foamed products containing the composition. Background technique [0002] The development of modern industry, especially the rapid development of petrochemical and plastic industries, especially the extensive use of disposable plastic products, has promoted the development of industrial and agricultural production and greatly enriched people's material life, but also caused serious damage to the human living environment. "white pollution". In recent years, countries around the world have legislated to restrict the production, sale and use of disposable plastic products. Therefore, many countries in the world are studying the use of degradable plastics to gradually replace traditional disposable plastics. [0003] At present, degradable plastics are mainly divided into t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/04C08L67/04C08J9/04
Inventor 李小鲁
Owner 李小鲁
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