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Fully biodegradable material with polylactic acid/polyterephthalic dibutyl adipate used as base materials and preparation method thereof

A technology of polybutylene terephthalate adipate and degradable materials, which is applied in the field of fully biodegradable materials and their preparation, and can solve the problems of insufficient tensile strength of PBAT materials

Inactive Publication Date: 2015-10-28
江苏天仁生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tensile strength of PBAT materials is not enough, and they cannot be directly used as plates, etc.; we combine their respective advantages to expand their application fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] 25 parts of polylactic acid (PLA), 54 parts of polybutylene terephthalate adipate (PBAT), 10 parts of corn starch, 10 parts of talc, 0.3 parts of compatibilizer, 0.7 parts of plasticizer, polylactic acid resin and The polybutylene terephthalate adipate resin is vacuum-dried to make its water content ≤200PPM, the above raw materials are added to the high mixer at 700r / min and mixed for 9 minutes to make it uniform, and then extruded through twin-screw 180r / min 0.2-0.5mm thick plate, according to the national standard GBT19811-2005 (the degree of disintegration of plastics under composting conditions), the disintegration degree is 100% after 20 weeks.

[0035]

example 2

[0037] 30 parts of polylactic acid (PLA), 49 parts of polybutylene terephthalate adipate (PBAT), 10 parts of corn starch, 10 parts of talc, 0.3 parts of compatibilizer, 0.7 parts of plasticizer, polylactic acid resin Dry treatment with polybutylene terephthalate adipate resin to make the water content ≤ 200PPM, add the above-mentioned raw materials into the high mixer at 700r / min and mix for 9 minutes to make it uniform, and then extrude through twin-screw 180r / min 0.2-0.5mm thick plate, according to the national standard GBT19811-2005 (the degree of disintegration of plastics under composting conditions), the disintegration degree is 100% after 20 weeks.

example 3

[0039] 33 parts of polylactic acid (PLA), 46 parts of polybutylene terephthalate adipate (PBAT), 10 parts of corn starch, 10 parts of talc, 0.3 parts of compatibilizer, 0.7 parts of plasticizer, polylactic acid resin Dry treatment with polybutylene terephthalate adipate resin to make the water content ≤ 200PPM, add the above-mentioned raw materials into the high mixer at 700r / min and mix for 9 minutes to make it uniform, and then extrude through twin-screw 180r / min 0.2-0.5mm thick plate, according to the national standard GBT19811-2005 (the degree of disintegration of plastics under composting conditions), the disintegration degree is 100% after 20 weeks.

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Abstract

The invention discloses a fully biodegradable material with polylactic acid / polyterephthalic dibutyl adipate used as base materials and a preparation method thereof. The material provided by the invention is composed of polylactic acid, polyterephthalic dibutyl adipate, a bio-based filler, an inorganic filler and a few amount of auxiliaries. The material has been certified by American ASTMD6400, European EN13432 and Australian AS4736 and is a fully biodegradable material. The fully biodegradable material contains the following ingredients, by weight, 5-60 parts of polylactic acid (PLA), 5-60 parts of polyterephthalic dibutyl adipate, 5-40 parts of the bio-based filler, 5-45 parts of the inorganic filler and 0.3-10 parts of the auxiliaries. The above ingredients are fully mixed, and the mixture undergoes melt plastification by a screw and then is directly extruded to obtain a board of 0.2-2mm thick. The board can undergo embossed work to obtain fruit trays, vegetable trays, disposable knives and forks and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a fully biodegradable material based on PLA / PBAT and a preparation method thereof. Background technique [0002] At present, the application of biodegradable materials is becoming more and more extensive, and the requirements for degradable materials are getting higher and higher. Not only do they have certain requirements for the performance of materials, but also have high requirements for their degradation safety, especially in food use and disposable materials. Supplies. [0003] Polylactic acid (PLA) material is a fully degradable biomaterial, including PLA and PDLA, which has superior physical properties and can be divided into injection molding grade, film grade and fiber grade according to its use. This material is hard and has high tensile strength, but its impact strength is limited, so it cannot be directly used as a molded sheet. Polybutylene t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L3/02C08L97/02C08L1/02C08K13/02C08K3/34C08K3/26C08K5/134B29C47/92B29C48/92
Inventor 阮刘文夏建平杨文军朱志勇
Owner 江苏天仁生物材料有限公司
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