Full-biodegradable high-barrier PLA/PBAT composite packaging film

A composite packaging film, high-barrier technology, applied in the field of packaging materials, can solve problems such as poor barrier properties, and achieve the effects of improving the performance of blocking oxygen, reducing the permeation area, and promoting the performance of blocking water vapor.

Inactive Publication Date: 2021-01-29
吴建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the technical problem to be solved in the present invention is: the barrier property of PLA / PBAT composite material to oxygen and water vapor is not good

Method used

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  • Full-biodegradable high-barrier PLA/PBAT composite packaging film
  • Full-biodegradable high-barrier PLA/PBAT composite packaging film
  • Full-biodegradable high-barrier PLA/PBAT composite packaging film

Examples

Experimental program
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Effect test

Embodiment 1

[0047]Nanoparticle-modified high-barrier PLA / PBAT composite packaging film, in parts by mass, includes the following components:

[0048] PLA 20 parts

[0049] 80 copies of PBAT

[0050] Chain extender 0.2 parts

[0051] Plasticizer 0.5 parts

[0052] Modified nano silicon dioxide 3 parts

[0053] Modified graphene 1 part

Embodiment 2

[0055] Nanoparticle-modified high-barrier PLA / PBAT composite packaging film, in parts by mass, includes the following components:

[0056] PLA 30 parts

[0057] PBAT 70 copies

[0058] Chain extender 0.5 parts

[0059] 1 part plasticizer

[0060] Modified nano silicon dioxide 5 parts

[0061] Modified graphene 3 parts

Embodiment 3

[0063] Nanoparticle-modified high-barrier PLA / PBAT composite packaging film, in parts by mass, includes the following components:

[0064] PLA 25 parts

[0065] PBAT 75 copies

[0066] Chain extender 0.3 parts

[0067] 1 part plasticizer

[0068] Modified nano silicon dioxide 4 parts

[0069] Modified graphene 2 parts

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Abstract

The invention relates to the technical field of packaging materials, in particular to a high-barrier PLA / PBAT composite packaging film. The biodegradable PLA / PBAT composite material is poor in barrierproperty to oxygen and water vapor. Aiming at the problems, the invention provides the high-barrier PLA / PBAT composite packaging film, the molecular structure of the modified nano silicon dioxide contains C=C double bonds, and the modified nano silicon dioxide can be polymerized with the modified graphene in the extrusion granulation process to form a tightly interlaced network structure, so thatthe internal free volume in the PLA / PBAT composite material system is filled to a certain extent; the oxygen blocking performance of the PLA / PBAT composite material is greatly improved; a tightly interlaced network structure formed by the modified nano silicon dioxide and the modified graphene and a molecular chain of polylactic acid are interpenetrated and intertwined together through hydrogen-bond interaction, so that the water vapor blocking performance of the PLA / PBAT composite material is further improved.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a fully biodegradable high-barrier PLA / PBAT composite packaging film. Background technique [0002] With the increasingly serious white pollution and the huge consumption of non-renewable resources such as petroleum, the preparation of new biodegradable materials has become a research hotspot in the field of packaging. PLA has excellent gas barrier ability and has a barrier effect on most greases. However, PLA is brittle and has poor processability. PBAT is a copolymer of butylene terephthalate and butylene adipate. It is also a biodegradable material. PBAT contains PBA and PBT chain segments, with excellent mechanical properties, strong toughness and good processing performance. , can be blown into film. [0003] At present, it has been reported that a PLA / PBAT composite material was obtained by melt blending PBAT and PLA (Zhang Ming. Preparation and properties of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08K9/04C08K3/04C08K9/06C08K3/36C08K5/11C08J5/18
CPCC08J5/18C08J2367/02C08J2467/04C08K3/36C08K5/11C08K9/04C08K9/06C08K2201/011C08K2201/014C08K3/042
Inventor 吴建
Owner 吴建
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