Starch and plant fiber composite biodegradable polyester film-blowing grade resin and preparation method

A technology for biodegrading polyester and plant fibers, applied in the field of blown film resins, can solve the problems of high cost, poor compatibility, and incomplete degradation, and achieve the advantages of improving heat resistance and strength, improving comprehensive performance, and improving aging performance. Effect

Inactive Publication Date: 2016-04-20
东莞市酬勤包装制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inclusion of polyolefin substances, which cannot be completely degraded, coupled with mechanical equipment and production technology problems, its price is higher than that of the original petrochemical plastics, and the current development prospects are not optimistic.
[0008] For this reason, by adding polylactic acid and polyadipate / butylene terephthalate to starch, the performance of the resin can be improved to a certain extent, but the compatibility between starch and aliphatic polyester Poor, which will affect the comprehensive properties of the material, such as tensile properties, tear strength, elongation at break, etc.
[0009] In addition, the cost of biodegradable polyester blown film grade resin in the prior art is relatively high, and cannot meet the needs of the market

Method used

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  • Starch and plant fiber composite biodegradable polyester film-blowing grade resin and preparation method
  • Starch and plant fiber composite biodegradable polyester film-blowing grade resin and preparation method
  • Starch and plant fiber composite biodegradable polyester film-blowing grade resin and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of starch / plant fiber composite biodegradable polyester blown film grade resin provided in this embodiment comprises the following components in parts by weight:

[0049]

[0050] Wherein, the polyester polymer is a mixture of poly(butylene adipate / terephthalate) and polylactic acid, and the mass ratio of the two is 8:2, the melting of poly(butylene adipate / terephthalate) The index is between 3.0 and 3.5, and the heat sealing strength is not less than 15N / m 2 . The molecular weight of polylactic acid is more than 10,000, and the melt index is between 10 and 30.

[0051] The amylose content of tapioca starch is above 20%, its moisture content is less than or equal to 10%, and its whiteness is greater than or equal to 87°.

[0052] The straw fiber is soaked in a sodium hydroxide solution with a mass concentration of 5%, wherein the mass ratio of the straw fiber to the sodium hydroxide solution is 1:20, and the mesh number of the straw fiber is 40 mesh;

[005...

Embodiment 2

[0063] A kind of starch / plant fiber composite biodegradable polyester blown film grade resin provided in this embodiment comprises the following components in parts by weight:

[0064]

[0065]

[0066] Wherein, the polyester polymer is a mixture of poly(butylene adipate / terephthalate) and polylactic acid, and the mass ratio of the two is 7:3, the melting of poly(butylene adipate / terephthalate) The index is between 3.0 and 3.5, and the heat sealing strength is not less than 15N / m 2 . The molecular weight of polylactic acid is more than 10,000, and the melt index is between 10 and 30.

[0067] The amylose content of potato starch is above 20%, its moisture content is less than or equal to 10%, and its whiteness is greater than or equal to 87°.

[0068] The wheat straw fibers are soaked in a sodium hydroxide solution with a mass concentration of 4%, wherein the mass ratio of the wheat straw fibers to the sodium hydroxide solution is 1:18, and the mesh number of the wheat...

Embodiment 3

[0079] A kind of starch / plant fiber composite biodegradable polyester blown film grade resin provided in this embodiment comprises the following components in parts by weight:

[0080]

[0081] Wherein, the polyester polymer is a mixture of polybutylene adipate / terephthalate and polylactic acid, and the mass ratio of the two is 9:1. The melt index of poly(butylene adipate / terephthalate) is between 3.0 and 3.5, and the heat seal strength is not less than 15N / m2 . The molecular weight of polylactic acid is more than 10,000, and the melt index is between 10 and 30.

[0082] The amylose content of corn starch is above 20%, its moisture content is less than or equal to 10%, and its whiteness is greater than or equal to 87°.

[0083] The sisal fiber is soaked in a sodium hydroxide solution with a mass concentration of 7%, wherein the mass ratio of the sisal fiber to the sodium hydroxide solution is 1:18, and the mesh number of the sisal fiber is 80 mesh;

[0084] In the treated...

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Abstract

The invention belongs to the technical field of film-blowing resin, and particularly relates to starch and plant fiber composite biodegradable polyester film-blowing grade resin. The starch and plant fiber composite biodegradable polyester film-blowing grade resin is prepared from, by weight, 20-60 parts of aliphatic polyester, 30-60 parts of plant starch, 5-10 parts of natural polymer plant fiber, 0.5-1 part of polyester crystallization auxiliary, 0.2-0.5 part of esterification reaction auxiliary, 10-30 parts of reaction auxiliaries and 1-5 parts of functional auxiliaries. According to the starch and plant fiber composite biodegradable polyester film-blowing grade resin, esterification treatment is conducted on the plant starch and the natural polymer plant fiber through the esterification reaction auxiliary, a transesterification reaction is further conducted through esters and aliphatic polyester in the blending extrusion process, starch graft aliphatic polyester copolymer is generated, and therefore the compatibility between the starch and the aliphatic polyester in a blend is improved.

Description

technical field [0001] The invention belongs to the technical field of blown film resins, and in particular relates to a low-cost starch / plant fiber composite biodegradable polyester blown film grade resin and a preparation method. Background technique [0002] As we all know, white pollution is constantly destroying the environment on which we live. The whole world is trying to find a way to eliminate the harm caused by "white pollution". [0003] For this reason, biodegradable blown film resin should be conceived. Biodegradable blown film resin refers to a class of resins that are degraded by the action of microorganisms such as bacteria, mold (fungi) and algae that exist in nature. The ideal biodegradable blown film resin is a polymer material with excellent performance, which can be completely decomposed by environmental microorganisms after being discarded, and finally inorganicized to become an integral part of the carbon cycle in nature. [0004] Polylactic acid (PLA...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/06C08L67/02C08L67/04C08L97/02C08K5/134C08K9/00C08K3/34
CPCC08L3/06C08L67/02C08L2201/06C08L2201/08C08L2203/16C08L2205/035C08L67/04C08L97/02C08K5/1345C08K9/00C08K3/34C08K5/098
Inventor 孟庆栓
Owner 东莞市酬勤包装制品有限公司
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