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Full-degradable injection molding composite material and preparation method thereof

A composite material and fully degradable technology, applied in the field of biodegradable materials, can solve the problems of high product cost and high price, and achieve the effect of solving color difference

Inactive Publication Date: 2010-11-10
任伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the degradation performance of the material is excellent, the method solves the defects that the polylactic acid product is fragile and the toughness is not high in the thermoplastic processing process, but its crosslinking agent tends to use polyester PBA, which is as expensive as polylactic acid. And the secondary cross-linking needs to be irradiated by an electron beam generator, so the product cost is relatively high

Method used

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  • Full-degradable injection molding composite material and preparation method thereof
  • Full-degradable injection molding composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Embodiment 1: Preparation process of injection molding composite material of the present invention

[0090] Modified starch 60kg Polylactic acid PLA 20kg

[0091] Polycaprolactone PCL 8kg Poly-beta-hydroxybutyrate PHB 6kg

[0092] Ethylene Acrylic Acid Copolymer EAA 2.8kg Glycerin 1.2kg

[0093] Gelatin 1.3kg Liquid wax 0.6kg

[0094] Calcium stearate 1.5kg Calcium carbonate 2kg

[0095] Glyceryl stearate 2.8kg.

[0096] Dry the above-mentioned modified starch at 55°C for 3 hours in advance, put it into a high-efficiency drum mixer, then add PCL, PHB and EAA, and mix at 65°C at 240rpm for 5 minutes; continue to add PLA and polyol components , gelatin, liquid wax, calcium stearate, calcium carbonate and glyceryl stearate, raise the temperature to 120°C, mix at a speed of 135rpm for 4 minutes, and carry out melting shear at the same time; reduce the temperature to 90°C, and keep the speed constant change, continue to stir for 3 minutes; then lower the temperature to ...

Embodiment 2

[0097] Embodiment 2: Preparation process of injection molding composite material of the present invention

[0098] Modified starch 50kg Polylactic acid PLA 18kg

[0099] Polycaprolactone PCL10kg Poly-β-hydroxybutyrate PHB 7kg

[0100] Ethylene Acrylic Acid Copolymer EAA 2.5kg Glycerin 4kg

[0101] Gelatin 1.5kg Liquid wax 0.6kg

[0102] Calcium stearate 1.3kg Calcium carbonate 2kg

[0103] Glyceryl stearate 2.5kg;

[0104] Dry the above-mentioned modified starch at 55°C for 3 hours in advance, put it into a high-efficiency drum mixer, then add PCL, PHB and EAA, and mix at 65°C at 260rpm for 5 minutes; continue to add PLA and polyol components , gelatin, liquid wax, calcium stearate, calcium carbonate and glyceryl stearate, raise the temperature to 125°C, mix at a speed of 135rpm for 4 minutes, and carry out melting shear at the same time; reduce the temperature to 90°C, and keep the speed constant change, continue to stir for 4 minutes; then lower the temperature to room ...

Embodiment 3

[0105] Embodiment 3: Preparation process of injection molding composite material of the present invention

[0106] Modified starch 70kg Polylactic acid PLA 8kg

[0107] Polycaprolactone PCL 6kg Poly-beta-hydroxybutyrate PHB 9kg

[0108] Ethylene Acrylic Acid Copolymer EAA 3.5kg Propylene Glycol 2kg

[0109] Gelatin 0.8kg Liquid wax 0.8kg

[0110] Calcium stearate 1.8kg Calcium carbonate 1.5kg

[0111] Glyceryl stearate 1.5kg.

[0112] Dry the above-mentioned modified starch at 55°C for 3 hours in advance, put it into a high-efficiency drum mixer, then add PCL, PHB and EAA, and mix at 65°C for 4 minutes at 240rpm; continue to add PLA and polyol components , gelatin, liquid wax, calcium stearate, calcium carbonate and glyceryl stearate, raise the temperature to 115°C, mix at a speed of 130rpm for 4 minutes, and carry out melting shear at the same time; reduce the temperature to 90°C, and keep the speed constant change, continue to stir for 3 minutes; then lower the temperat...

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Abstract

The invention discloses a full-degradable injection molding composite material, which is mainly prepared by blending starch, polylactic acid and polyester. In the full-degradable injection molding composite material, factors such as degradability, processability, usability, cost performance and the like are considered fully, the problems of chromatic aberration and texture are solved, and the composite material is suitable to be processed into various injection molding devices.

Description

field of invention [0001] The invention relates to the field of biodegradable materials, and is an injection molding composite material mainly using starch, polylactic acid and degradable polyester as base materials. The invention also relates to a preparation method of the degradable injection molding composite material. Background technique [0002] The concept of biodegradable materials originated in the 1960s. Most of these materials are high-molecular polymers, and their monomers usually come from the fermentation of crops themselves. It is destroyed and degraded, producing carbon dioxide and water, as well as other minerals. This is different from traditional plastics, because polymer plastics will not decompose under the same conditions and can exist for a long time. In terms of source, biodegradable materials are obtained from renewable plants (it can also be derived from petrochemical resources, but it is emphasized that the polymers formed can be completely decomp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/04C08L67/04C08L23/08C08L33/02C08K13/02C08K5/053C08K5/098C08K3/26C08K5/103B29B7/72B29C47/92B29C48/92
CPCB29C48/92B29C2948/9259B29C2948/926B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 任伟孙阿嫔张成文
Owner 任伟
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