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Three-layer co-extrusion full-biodegradable delivery packaging bag and preparation method thereof

A three-layer co-extrusion, all-biological technology, applied in the direction of biological packaging, packaging, transportation and packaging, etc., can solve the problems of insufficient tear strength, tensile strength, elongation at break and heat-sealing strength, etc., and achieve excellent mechanical properties , high tear strength, significant economic and social effects

Inactive Publication Date: 2019-01-18
JILIN COFCO BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the bags made by the above technology have the problems of insufficient tear strength, tensile strength, elongation at break and heat seal strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] It is made of the following inner layer, middle layer and outer layer raw materials and methods in the following parts by weight:

[0027] The raw materials of the inner layer are: 60 parts of PBAT, PLA10, 0.5 part of plasticizer, 0.5 part of plasticizer B, 0.1 part of nucleating agent, 0.1 part of chain extender, 0.1 part of blocking agent, 0.1 part of lubricant, carbon Black 0.1 part;

[0028] The middle layer raw materials are: 55 parts of PBAT, 10 parts of PLA, 0.5 parts of plasticizer A, 0.5 parts of plasticizer B, 0.1 part of chain extender, 0.1 part of lubricant, and 8 parts of titanium dioxide;

[0029] The raw materials for the outer layer are: 55 parts of PBAT, 10 parts of PLA, 0.5 parts of plasticizer A, 0.5 parts of plasticizer B, 0.1 part of chain extender, 0.1 part of lubricant, and 8 parts of titanium dioxide;

[0030] The preparation method is as follows:

[0031] (1) The raw materials of the inner layer are weighed according to the formula, and then P...

Embodiment 2

[0038] It is made of the following inner layer, middle layer and outer layer raw materials and methods in the following parts by weight:

[0039] The inner layer raw materials are: 72 parts of PBAT, 17 parts of PLA, 2.5 parts of plasticizer A, 2.5 parts of plasticizer B, 2 parts of nucleating agent, 0.5 part of chain extender, 0.5 part of antiblocking agent, and 0.5 part of lubricant , 1.5 parts of carbon black;

[0040]The middle layer raw materials are: 65 parts of PBAT, 17 parts of PLA, 2.5 parts of plasticizer A, 2.5 parts of plasticizer B, 0.5 part of chain extender, 0.5 part of lubricant, and 12 parts of titanium dioxide;

[0041] The raw materials for the outer layer are: 67 parts of PBAT, 17 parts of PLA, 2.5 parts of plasticizer A, 2.5 parts of plasticizer B, 0.5 part of chain extender, 0.5 part of lubricant, and 12 parts of titanium dioxide;

[0042] The preparation method is as follows:

[0043] (1) The raw materials of the inner layer are weighed according to the...

Embodiment 3

[0050] It is made of the following inner layer, middle layer and outer layer raw materials and methods in the following parts by weight:

[0051] The raw materials of the inner layer are: 85 parts of PBAT, 25 parts of PLA, 5 parts of plasticizer A, 5 parts of plasticizer B, 4 parts of nucleating agent, 1 part of chain extender, 1 part of blocking agent, 1 part of lubricant, 3 parts of carbon black share;

[0052] The middle layer raw materials are: 75 parts of PBAT, 25 parts of PLA, 5 parts of plasticizer A, 5 parts of plasticizer B, 1 part of chain extender, 1 part of lubricant, and 15 parts of titanium dioxide;

[0053] The raw materials for the outer layer are: 80 parts of PBAT, 25 parts of PLA, 5 parts of plasticizer A, 5 parts of plasticizer B, 1 part of chain extender, 1 part of lubricant, and 15 parts of titanium dioxide;

[0054] The preparation method is as follows:

[0055] (1) The raw materials of the inner layer are weighed according to the formula, and then PLA,...

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Abstract

The invention relates to a three-layer co-extrusion full-biodegradable delivery packaging bag and a preparation method thereof, and belongs to the field of high polymer materials. Raw material components of an inner layer, a middle layer and an outer layer are mixed to be uniform respectively according to the formula, master batches are prepared through a twin-screw extruding machine, and then a three-layer full-biodegradable film is prepared through a three-layer co-extrusion blow molding process. The film is subjected to the gluing, heat sealing and cutting procedures of a delivery packagingbag making machine, and the delivery packaging bag is prepared. The material formula good in opening performance and film forming performance is adopted on the middle layer and the inner layer, and the material formula good in mechanical performance and film forming performance is adopted on the middle layer and the outer layer. The delivery packaging bag has full biodegradability, has excellentmechanical performance, heat sealing performance and seal adhesive sealing performance and can replace a delivery packaging bag prepare from a non-biodegradable plastic PE film.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a three-layer co-extrusion fully biodegradable express packaging bag and a preparation method thereof. Background technique [0002] Following the implementation of the plastic ban in Jilin Province, Jiangsu Province is already planning to introduce policies and regulations to promote biodegradable materials. Hainan Province has launched a policy to promote the use of biodegradable express bags and other film bag products. The national trend of banning and limiting plastics It is becoming more and more obvious. The rapid growth and huge demand of express packaging materials have brought about serious environmental pollution problems. With the increasing environmental protection requirements, the demand for biodegradable materials in my country and the world has shown explosive growth. [0003] Polylactic acid (PLA) is favored because of its high mechanical strength, good processab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D30/02C08L67/02C08L67/04C08K3/04C08K3/22B29C69/00B29C48/18B29C55/28
CPCB29C55/28C08K2003/2241C08L67/02C08L2201/06C08L2205/02C08L67/04C08K3/04C08K3/22Y02W90/10
Inventor 李义佟毅郝艳平刘志刚颜祥禹肖洋唐明勋王文玲王金枝武丽达张会良
Owner JILIN COFCO BIOCHEM
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