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Completely biological degradable polylactic coating materials

A coating material and biodegradable technology, applied in coating, paper coating, fiber raw material treatment, etc., can solve the problems of easy processability and low cost limitation

Inactive Publication Date: 2005-07-27
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plasticized PLA is not covered in these three patents, so its ease of processing and low cost are limited

Method used

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  • Completely biological degradable polylactic coating materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The composition of the coating material includes 100 parts by weight of non-crystalline polylactic acid, 5 parts by weight of compound plasticizer, and 0.1 part by weight of oleic acid amide. The compound plasticizer contains 2 parts of polyethylene glycol and 3 parts of triethyl citrate. The polylactic acid, compound plasticizer and additives of the above composition are mixed by mechanical stirring, melted, extruded and granulated by a twin-screw extruder to obtain a plasticized polylactic acid composition, which is coated by extrusion coating with a T-shaped die The equipment extrudes the plasticized polylactic acid composition into a film or sheet and presses it on the paper layer to form a completely biodegradable polylactic acid coating material.

Embodiment 2

[0017] The composition of the coating material includes 100 parts by weight of non-crystalline polylactic acid and 30 parts by weight of a compound plasticizer. The composite plasticizer contains 20 parts of triacetin and 10 parts of poly-1,3-butylene sebacate, and the preparation method of the materials is the same as in Example 1.

Embodiment 3

[0019] The composition of the coating material includes 100 parts by weight of crystalline polylactic acid, 70 parts by weight of a compound plasticizer, and 5 parts by weight of diatomite. The compound plasticizer contains 20 parts of triacetin, 20 parts of poly(1,3-butylene adipate) and 30 parts of acetyl triethyl citrate. The preparation method of the materials is the same as in Example 1.

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Abstract

A fully biodegradable polylactic acid coating material for the coated paper consisting of paper substrate and coated plasticizing polylactic acid composition is disclosed. Said plasticizing polylactic acid composition contains proportionally polylactic acid, composite plasticizer chosen from polyethandiol, glucoside triacetate, triethyl citrate, tributyl citrate, triethyl acetylacetate, etc, lipoamide and inorganic filler. The coated paper features high resistance to water, oil and high temp, air tight, and antibacterial effect.

Description

technical field [0001] The invention belongs to a preparation method of a completely biodegradable polylactic acid coating material. Background technique [0002] Polymer materials based on petrochemical products are widely used in defense and civilian fields in the form of films, sheets, pipes, fibers, foams and other forms. These polymer materials all become waste after use and have a certain impact on the natural environment. Although countries around the world have made a lot of research and industrialization efforts on the recycling of polymer waste, the results are not satisfactory, and the problem of pollution of the natural environment by polymer waste cannot be fundamentally solved. In order to overcome this problem, countries around the world have paid more and more attention to fully biodegradable polymer materials. [0003] Polylactic acid is a completely biodegradable polymer material, which is finally degraded into inorganic substances such as water and carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L67/00D21H19/20D21H23/22
Inventor 郭晓明杨宇明王建颖王军张延任忠杰董丽松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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