Preparation method of polylactic acid degradable material

A degradable material, polylactic acid technology, applied in the field of degradable material production, can solve the problems of land production reduction, soil structure damage, impact resistance, insufficient thermal stability, etc., achieve good air permeability, simple production process, and superior performance Effect

Inactive Publication Date: 2010-09-08
祝光富
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These abandoned water-retaining films also caused great damage to the soil structure of the land, which directly led to a series of adverse consequences such as land production reduction.
[0005] Based on the above, the application of polylactic acid to traditional plastic products is a current research direction, but in the actual preparation process, polylactic acid materials still have certain deficiencies, such as its impact resistance, thermal stability, etc. There are deficiencies, especially when applied to products such as films, and further research is needed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Polylactic acid: 50%; Poly(diglycidyl sebacate-D, L-malic acid): 45%; Talc: 5%;

Embodiment 2

[0033] Polylactic acid: 95%; poly(diglycidyl azelate-D, L-malic acid): 4%; talc: 1%;

[0034] A twin-screw extruder is used in the granulator of the present invention, and the extruded molten strands are cooled by water cooling in the granulator, wherein the processing temperature is 180° C., and the screw speed is 150 rpm. . The specifications of the finally produced biodegradable resin particles are: particle size φ2-3mm, length 3-4mm, cylindrical particles.

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Abstract

The invention relates to the technical field of a production method of a degradable material, in particular to a preparation method of a polylactic acid degradable material. The method comprises the following steps: firstly, preparing the following raw materials in percentage by weight: 50-95% of polylactic acid, 4-45% of polyhydric polyester and 1-5% of talcum powder; adding the polylactic acid,the polyhydric polyester and the talcum powder to a high-speed mixer, and uniformly stirring; and finally, placing the uniformly-mixed materials in a pelletizer, mixing, melting, extruding, cooling, and pelleting to obtain the degradable material. The production method of the invention has the advantage of simple process, adopts a one-step method to mix the various materials, and uses a double screw extruder to pelletize the materials to obtain the prepared material. The film made of the degradable material prepared by the invention has the advantages of good film formation and various excellent performance indices.

Description

Technical field: [0001] The invention relates to the technical field of production methods of degradable materials, in particular to a preparation method of polylactic acid degradable materials. Background technique: [0002] Polylactic acid (PLA), also known as polylactide, belongs to the family of polyesters. Polylactic acid is a polymer obtained by polymerizing lactic acid as the main raw material. The raw material source is sufficient and can be regenerated. The production process of polylactic acid is non-polluting, and the product can be biodegraded to realize the cycle in nature, so it is an ideal green polymer material. [0003] Since polylactic acid is a new type of biodegradable material, it is made from starch raw materials proposed by renewable plant resources (such as corn). The starch raw material is fermented into lactic acid, which is then converted into polylactic acid through chemical synthesis. It has good biodegradability and can be completely degraded...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/00C08L67/02C08K3/34B29B9/06
Inventor 祝光富王平彭贤宾吕光春孙立波
Owner 祝光富
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