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Fully biodegradable sheet and preparation method thereof

An all-biological, sheet-based technology, applied in the field of packaging materials, can solve problems such as increased processing difficulty, poor material toughness, and reduced compatibility, and achieve the effects of improving processing performance, increasing flexibility, and increasing melt viscosity

Inactive Publication Date: 2020-04-21
周锐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although polylactic acid has excellent biodegradability and good mechanical processing performance, but because polylactic acid contains a large number of ester bonds, its hydrophilicity is poor, which reduces its compatibility with other raw materials, making processing more difficult; And because polylactic acid itself is a linear polymer with high brittleness, the toughness of the material is poor

Method used

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  • Fully biodegradable sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: A fully biodegradable sheet is prepared by the following method:

[0035] S1, mixing materials: take polylactic acid 75kg, polybutylene succinate 15kg, biocompatibility agent 5kg, biotoughening agent 3kg, smooth agent 0.9kg, calcium carbonate 1.0kg and antioxidant 1010 0.1kg, Stir at a high speed for 15 minutes at a temperature of 70°C and a stirring speed of 1500r / min to obtain a mixture;

[0036] S2. Plastic molding: put the mixture into the sheet extruder, and the temperature of each zone is: the temperature of the first zone is 190°C, the temperature of the second zone is 200°C, the temperature of the third zone is 210°C, the temperature of the fourth zone is 215°C, and the temperature of the fifth zone is 215°C. The temperature in the zone is 215°C, the temperature in the sixth zone is 220°C, the temperature in the seventh zone is 225°C, and the temperature of the die head is 240°C. After melting and extrusion molding, a fully biodegradable sheet with a ...

Embodiment 2

[0037] Example 2: A fully biodegradable sheet is prepared by the following method:

[0038] S1, mixing materials: take polylactic acid 70kg, polybutylene succinate 10kg, biocompatibility agent 4kg, biotoughening agent 2kg, smooth agent 0.8kg, calcium carbonate 0.8kg and antioxidant 168 0.08kg, Stir at a high speed for 10 minutes at a temperature of 60°C and a stirring speed of 1000 r / min to obtain a mixture;

[0039] S2. Plastic molding: put the mixture into the sheet extruder, the temperature of each zone is: the temperature of the first zone is 180°C, the temperature of the second zone is 185°C, the temperature of the third zone is 190°C, the temperature of the fourth zone is 190°C, the temperature of the fifth zone is 190°C, The temperature in the zone is 200°C, the temperature in the sixth zone is 210°C, the temperature in the seventh zone is 210°C, and the temperature of the die head is 220°C. After melting and extrusion molding, a fully biodegradable sheet with a thickne...

Embodiment 3

[0040] Example 3: A fully biodegradable sheet is prepared by the following method:

[0041] S1. Mixing materials: Take 80kg of polylactic acid, 20kg of polybutylene succinate, 6kg of biocompatibility agent, 4kg of biotoughening agent, 1kg of slip agent, 1.2kg of calcium carbonate and 10760.12kg of antioxidant. Under the conditions of 80°C and a stirring speed of 2000r / min, stir at high speed for 20min to obtain a mixture;

[0042] S2. Plastic molding: put the mixture into the sheet extruder, and the temperature of each zone is: the temperature of the first zone is 200°C, the temperature of the second zone is 210°C, the temperature of the third zone is 220°C, the temperature of the fourth zone is 220°C, and the temperature of the fifth zone is 220°C. The temperature in the zone is 230°C, the temperature in the sixth zone is 230°C, the temperature in the seventh zone is 240°C, and the temperature of the die head is 260°C. After melting and extrusion molding, a fully biodegradabl...

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Abstract

The invention discloses a fully biodegradable sheet and a preparation method thereof, belonging to the technical field of packaging materials. According to main points of a technical scheme in the invention, the fully biodegradable sheet comprises the following components in parts by weight: 70 to 80 parts of polylactic acid, 10 to 20 parts of polybutylene succinate, 4 to 6 parts of a biological compatilizer, 2 to 4 parts of a biological toughening agent, 0.8 to 1 part of a slipping agent, 0.8 to 1.2 parts of calcium carbonate and 0.08 to 0.12 part of an antioxidant, wherein the biological compatilizer is a styrene-acrylonitrile-glycidyl methacrylate ternary random copolymer, and the biological toughening agent is a vinyl acetate-ethylene-vinyl ester copolymer. The biodegradable sheet provided by the invention has excellent degradability, hardness, toughness and processability.

Description

technical field [0001] The invention relates to the technical field of packaging materials, more specifically, it relates to a raw biodegradable sheet and a preparation method thereof. Background technique [0002] Biodegradable plastics refer to a class of plastics that are degraded by the action of naturally occurring microorganisms such as bacteria, molds (fungi) and algae. Biodegradable plastics can be divided into completely biodegradable plastics and destructive biodegradable plastics. Completely biodegradable plastics are mainly made of natural polymers (such as starch, cellulose, chitin) or agricultural by-products that are biodegradable through microbial fermentation or synthesis. Polymers, such as thermoplastic starch plastics, aliphatic polyesters, polylactic acid, starch / polyvinyl alcohol, etc., all belong to this type of plastics; destructive biodegradable plastics currently mainly include starch modified (or filled) polyethylene PE, polyvinyl alcohol, etc. Pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L25/14C08L31/04C08L71/02C08L23/08C08K13/02C08K5/20C08K5/101C08J5/18C08G63/91C08G63/08
CPCC08G63/08C08G63/912C08J5/18C08J2300/16C08J2367/04C08J2423/08C08J2425/14C08J2431/04C08J2467/02C08J2471/02C08K5/101C08K5/20C08K13/02
Inventor 周锐李双利
Owner 周锐