Starch based biodegradable flexible packing materials, and preparation method

A flexible packaging, starch-based technology, applied in the field of starch-based biodegradable flexible packaging materials and its preparation, can solve the problems of white pollution, etc., and achieve the effect of low production cost, smooth surface, light white and transparent appearance

Inactive Publication Date: 2005-01-12
郭志伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to disclose a starch-based biodegradable flexible packaging material and its preparation method, so as to overcome the above-mentioned defects in the prior art and solve the serious white pollution caused by non-degradable plastic packaging materials to the human living environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 60 kilograms of cornstarch, 20 kilograms of polyvinyl alcohol, and 20 kilograms of talcum powder, and mix the materials at high speed in a mixer. The blending temperature is controlled at 90 ° C, extruded and granulated, and blown at 160 ° C. The film forming speed is 0.16 M / S, a cornstarch-based biodegradable flexible packaging material with a thickness of 0.05mm was prepared.

[0026] Adopt ASTMD5338-92 standard to test the obtained material, the results are as follows:

[0027] Biodegradation begins after 20 days of soil burial at room temperature, and it is completely degraded within 3 months.

[0028] The QB / T2461-1999 standard was used for testing, and the results are as follows:

[0029] The biodegradation rate was 26.0%.

Embodiment 2

[0031] Take 60 kilograms of cornstarch, 10 kilograms of sorbitol, 10 kilograms of 10 kilograms of ethylene acrylic acid copolymer, and 10 kilograms of talcum powder, and mix them in a mixer at a high speed. Film forming, the film forming speed is 0.2M / S, and the corn starch-based biodegradable flexible packaging material with a thickness of 0.02mm is prepared.

[0032] The obtained materials were tested using the ASTM D5338-92 standard, and the results were as follows: biodegradation began after 20 days of soil burial at room temperature, and all degraded within 3 months.

[0033] The QB / T2461-1999 standard was used for testing, and the results are as follows:

[0034] The biodegradation rate was 26.0%.

Embodiment 3

[0036] Take 80 kilograms of wheat starch, 4 kilograms of polyvinyl alcohol, 3 kilograms of sorbitol, 3 kilograms of ethylene acrylic acid copolymer, and 10 kilograms of calcium carbonate, mix them in a mixer at high speed, control the blending temperature at 120 ° C, and extrude and granulate , 200 ℃ blown film forming, the film forming speed is 0.18M / S to prepare the corn starch-based biodegradable flexible packaging material with a thickness of 0.03mm.

[0037] The obtained materials were tested using the ASTM D5338-92 standard, and the results were as follows: biodegradation began after 20 days of soil burial at room temperature, and all degraded within 3 months.

[0038] The QB / T2461-1999 standard was used for testing, and the results are as follows:

[0039] The biodegradation rate was 26.0%.

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Abstract

A biological degradable soft packing material of starch base is a type of soft film packing material made of starch, plasticizer and filler. The material can be degraded thoroughly under natural condition after it is buried underground for 3-4 monthes.

Description

technical field [0001] The invention relates to a biodegradable material, in particular to a starch-based biodegradable soft packaging material and a preparation method thereof. Background technique [0002] With the advancement of the times, the global plastic production has exceeded 100 million tons per year, 30% of which are used for packaging. Since this product with a short life cycle cannot be degraded after use, it has brought a lot of garbage to the human living environment. The growing Plastic "garbage mountains" are increasingly seen as a threat to the ecosystem and long-term environmental pollution. Therefore, everyone hopes to have completely degradable flexible packaging materials to replace non-degradable plastic packaging materials. Contents of the invention [0003] The technical problem to be solved in the present invention is to disclose a starch-based biodegradable flexible packaging material and its preparation method, so as to overcome the above-mentio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L3/02
Inventor 郭志伟朱拥军吴丽娜吴瑜余小敏
Owner 郭志伟
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