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Preparation method of poly(butylene adipate-co-terephthalate)/polylactic acid/starch ternary blended film blowing resin

A polybutylene terephthalate and adipate technology, which is applied in the field of materials, can solve the problems of poor water resistance of films, reduced material costs, and no resistance to humid environments.

Inactive Publication Date: 2020-12-22
江苏碧升生物新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the cost of materials can be greatly reduced by blending and modifying with starch. At the same time, starch is a degradable natural polymer. Polybutylene terephthalate-adipate The cost of starch film is greatly reduced, but the film has poor water resistance and is not resistant to humid environments. Adding polylactic acid can improve the water and moisture resistance of the film and improve the shelf life of the film. How to make good use of these existing technologies to provide film products with better performance become one of the important problems to be solved urgently in this field

Method used

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  • Preparation method of poly(butylene adipate-co-terephthalate)/polylactic acid/starch ternary blended film blowing resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Weigh 98.1 parts of starch, 1.5 parts of maleic anhydride, and 0.4 parts of titanate coupling agent; the order of addition is starch, maleic anhydride, and titanate coupling agent; turn the mixing speed to high speed and stir at high speed to 90°C, continue to stir for about 3 minutes to discharge, and obtain modified starch;

[0024] (2) Weigh 57 parts of PBAT, 24 parts of modified starch, 5 parts of polylactic acid, 9 parts of sorbitol liquid, 3 parts of talcum powder, 0.4 parts of erucamide, 0.5 parts of calcium stearate, ADR-4370F0.1 Part, 1 part of ethylene bis stearic acid amide;

[0025] (3) Add the raw materials into the high-speed mixer in a certain order, and the order of addition is PBAT, modified starch, polylactic acid, talcum powder, erucamide, calcium stearate, ethylene bisstearamide, ADR-4370F , Sorbitol liquid; the mixing speed is turned to high speed, and the material can be discharged after stirring at high speed for about 10 minutes;

[0026] (...

Embodiment 2

[0029] (1) Weigh 98.1 parts of starch, 1.5 parts of maleic anhydride, and 0.4 parts of aluminate coupling agent; the order of addition is starch, maleic anhydride, and aluminate coupling agent; turn the mixing speed to high speed and stir at high speed to 90°C, continue to stir for about 3 minutes to discharge, and obtain modified starch;

[0030] (2) Weigh 58 parts of PBAT, 20 parts of modified starch, 10 parts of polylactic acid, 8 parts of sorbitol liquid, 2.5 parts of talcum powder, 0.3 parts of erucamide, 0.5 parts of calcium stearate, ADR-4370F0.2 Part, 0.5 part of ethylene bis stearic acid amide;

[0031] (3) Add the raw materials into the high-speed mixer in a certain order, and the order of addition is PBAT, modified starch, polylactic acid, talcum powder, erucamide, calcium stearate, ethylene bisstearamide, ADR-4370F , Sorbitol liquid; the mixing speed is turned to high speed, and the material can be discharged after stirring at high speed for about 10 minutes;

[...

Embodiment 3

[0035] (1) Weigh 98.1 parts of starch, 1.5 parts of maleic anhydride, and 0.4 parts of silane coupling agent (KH550); the order of addition is starch, maleic anhydride, and silane coupling agent; 90°C, continue to stir for about 3 minutes to discharge, and obtain modified starch;

[0036] (2) Weigh 55 parts of PBAT, 18 parts of modified starch, 15 parts of polylactic acid, 8 parts of sorbitol liquid, 2.5 parts of talcum powder, 0.3 parts of erucamide, 0.5 parts of calcium stearate, ADR-4370F0.2 Part, 0.5 part of ethylene bis stearic acid amide;

[0037] (3) Add each raw material into the high-speed mixer in a certain order, and the order of addition is PBAT, modified starch, polylactic acid, talcum powder, erucamide, calcium stearate, ADR-4370F, ethylene bisstearamide , Sorbitol liquid; the mixing speed is turned to high speed, and the material can be discharged after stirring at high speed for about 10 minutes;

[0038] (4) Add the mixed raw materials into the hopper of the t...

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Abstract

The invention provides a completely biodegradable film, which is mainly composed of poly(butylene adipate-co-terephthalate) / polylactic acid / starch, and comprises the following raw materials: 40-65 parts by weight of poly(butylene adipate-co-terephthalate) (PBAT), 5-35 parts by weight of polylactic acid, 10-30 parts by weight of modified starch, 0.1-1 part by weight of an opening agent, 0.5-2 partby weight of a lubricant, 3-13 parts by weight of a plasticizer, 0.1-0.5 part by weight of a chain extender, and 1-5 parts by weight of talcum powder. According to the invention, the poly(butylene adipate-co-terephthalate) resin is mixed with the modified starch, the polylactic acid and the rest auxiliary agents, and the specific ratio is combined; and therefore, the film prepared from the finallyprepared composition has the advantages of high tensile and tearing strength, good elasticity modulus, good elongation at break, good moisture resistance and water resistance, good barrier property,good degradability and the like. The blow-molded film has good mechanical properties, has the advantage of complete biodegradation, can be completely degraded into water and carbon dioxide in soil, isbeneficial to environmental protection, and has wide application value.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a polybutylene terephthalate-adipate / polylactic acid / starch completely biodegradable blown film resin and a film preparation method thereof. Background technique [0002] The environmental pollution caused by petroleum-based plastics is becoming more and more serious, and there is an urgent need to replace them with fully degradable plastics. Polybutylene terephthalate-adipate (PBAT) is a fully degradable plastic widely studied at home and abroad. However, the thin film prepared by pure PBAT is soft, has low strength and high cost, which is limited in many application fields. Therefore, in the application process, PBAT is usually blended with other materials to improve its application performance. [0003] The high raw material cost of PBAT is a major factor limiting its promotion and use. Therefore, it is a necessary process to add low-cost fillers for blending modification...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L3/04C08K13/02C08K5/20C08K5/098C08K3/34C08K5/10C08K5/092C08J5/18
CPCC08J5/18C08J2367/02C08J2403/04C08J2467/04C08K3/34C08K5/092C08K5/098C08K5/10C08K5/20C08K13/02C08K2201/014
Inventor 张会良王进
Owner 江苏碧升生物新材料有限公司
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