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Degradable biological thin film and preparation method thereof

A biofilm and film technology, applied in the field of degradable biofilm and its preparation, can solve the problems that cannot be widely applied and promoted

Active Publication Date: 2018-07-20
海南宜鑫环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The starch content of the existing biodegradable bio-based film plastic products can reach 15%; but the performance of the product needs to increase the thickness to achieve the physical properties of traditional plastic products, so the cost of various packaging products manufactured is at a high price , cannot be widely applied and promoted at present

Method used

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  • Degradable biological thin film and preparation method thereof

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preparation example Construction

[0046]The present invention also provides a method for preparing the above biodegradable biofilm, comprising: extruding and blowing the inner layer film raw material, the middle layer film raw material and the outer layer film raw material through a three-layer co-extrusion blown film machine, and cooling to obtain Degradable biological film; the outer layer film is formed by 50-75 parts by weight of the first polymer, 15-20 parts by weight of the first modified starch and 10-17 parts by weight of the first additive; the middle layer film It is formed by 45-65 parts by weight of the second polymer, 20-30 parts by weight of the second modified starch and 10-17 parts by weight of the second additive; the inner film is composed of 50-70 parts by weight of the third polymer 15-25 parts by weight of the third modified starch and 10-17 parts by weight of the third additive; and the material composition ratio of the outer layer film and the middle layer film is different; the first po...

Embodiment 1

[0054] The raw material of the outer layer film: modified starch content is 15%; polylactic acid 15%; polybutylene oxalate terephthalate 13%; ethylene-acrylic acid copolymer 30%; polyethylene medium density FB#2230 / 231010%; talcum powder 5%; chain extender 1.3%; erucamide 0.4%; zinc stearate 0.35%; melt strength enhancer 0.3%; anti-hydrolysis stabilizer 1.5%; Wax 0.65%.

[0055] The raw material of the middle layer film: modified corn starch content 25%; Jinan Daigang Biotechnology Co., Ltd. polylactic acid 10%; Shenzhen Huibaotong Industrial Co., Ltd. polybutylene oxalate terephthalate 13%; Hangzhou Shengou Plastic Chemical Co., Ltd. ethylene-acrylic acid copolymer 25%; Borealis polyethylene medium density FB#2230 / 2310 10%; talcum powder 5%; Zhangjiagang Yarui Chemical Co., Ltd. chain extender 1.3%; Hubei Xinhe Raw Materials Co., Ltd. Responsible company erucamide 0.4%; Yangzhou Linghang Chemical Co., Ltd. zinc stearate 0.35%; Xinjiang Lanshan melt strength enhancer 0.3%; Q...

Embodiment 2

[0065] Raw materials for the outer film: 20% modified corn starch; 13% polylactic acid from Jinan Daigang Biotechnology Co., Ltd.; 10% polybutylene terephthalate from Shenzhen Huibaotong Industrial Co., Ltd.; Hangzhou Shengou Plastic Chemical Co., Ltd. ethylene-acrylic acid copolymer 30%; Borealis polyethylene medium density FB#2230 / 2310 10%; talcum powder 5%; Zhangjiagang Yarui Chemical Co., Ltd. chain extender 1.3%; Hubei Xinhe Raw Materials Co., Ltd. The company's erucamide 0.4%; Yangzhou Linghang Chemical Co., Ltd. zinc stearate 0.35%; Xinjiang Lanshan melt strength enhancer 0.3%; Qingdao Changrong Chemical's environmental protection anti-hydrolysis stabilizer 1.5%; Penglai Sanyou DIDF-40 Anti-ultraviolet additive 7.5%; PE wax 0.65% of Xinkehong Plastic Factory in Nan'an City, Fujian Province. .

[0066] The raw material of the middle layer film: 25% of modified cornstarch content; preferably 10% of polylactic acid of Jinan Daigang Biotechnology Co., Ltd; 13% of polybutyl...

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Abstract

The invention provides a degradable biological thin film. The degradable biological thin film comprises an inner-layer thin film, a middle-layer thin film and an outer-layer thin film, which are arranged in sequence, wherein the outer-layer thin film is prepared from the following components in parts by weight: 50 to 75 parts of a first polymer, 15 to 20 parts of first modified starch and 10 to 17parts of a first additive; the middle-layer thin film is prepared from the following components in parts by weight: 45 to 65 parts of a second polymer, 20 to 30 parts of second modified starch and 10to 17 parts of a second additive; the inner-layer thin film is prepared from the following components in parts by weight: 50 to 70 parts of a third polymer, 15 to 25 parts of third modified starch and 10 to 17 parts of a third additive; the material component ratios of the outer-layer thin film and the middle-layer thin film are different. Compared with the prior art, the degradable biological thin film has relatively high flatness at a heat sealing part; while the content of the starch is improved, the cost is reduced and relatively good physical performance is also kept.

Description

technical field [0001] The invention belongs to the technical field of degradable films, and in particular relates to a degradable biological film and a preparation method thereof. Background technique [0002] Degradable film products are mainly used in daily-use plastic products, such as: supermarket shopping bags, garbage bags, various plastic packaging bags for industry, and plastic film for agriculture. [0003] The starch content of the existing biodegradable bio-based film plastic products can reach 15%; but the performance of the product needs to increase the thickness to achieve the physical properties of traditional plastic products, so the cost of various packaging products manufactured is at a high price , cannot be widely applied and promoted at present. With the development of technology, various enterprises strive to further reduce the cost of degradable film products on the basis of satisfying the good physical and mechanical properties of various packaging ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L3/04C08L67/04C08L67/02C08L23/06C08K3/34C08K5/20C08K5/098C08J5/18B32B27/08B32B27/32B32B27/36
CPCB32B27/08B32B27/32B32B27/36C08J5/18C08J2303/04C08J2323/08C08J2403/04C08J2423/08C08L3/04C08L23/0869C08L2201/06C08L2205/035C08L67/04C08L67/02C08L23/06C08K3/34C08K5/20C08K5/098
Inventor 李晓书李永华唐小东唐琴
Owner 海南宜鑫环保材料有限公司
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