Biodegradable polylactic acid film and preparation method thereof

A polylactic acid and film technology, applied in the field of film products, can solve problems such as environmental hazards, white pollution, accumulation of plastic waste, etc., and achieve the effect of enhancing thermal insulation performance, less demanding, and improving strength and toughness.

Inactive Publication Date: 2016-12-14
安徽明诚塑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the chemical stability of general-purpose plastics, they will exist stably in the environment for a long time after they are abandoned, causing a large amount of plastic waste to accumulate in the environment, causing serious harm to the environment, such as white pollution, agricultural white cancer And other issues

Method used

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  • Biodegradable polylactic acid film and preparation method thereof
  • Biodegradable polylactic acid film and preparation method thereof
  • Biodegradable polylactic acid film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A biodegradable polylactic acid film is composed of the following raw materials by weight: 65 parts of polylactic acid, 8 parts of polybutylene carbonate, 10 parts of polyethylene, 25 parts of starch, 3 parts of zinc stearate, and 6 parts of magnesium oxide , 5 parts of vermiculite powder, 6 parts of kaolin, 2 parts of plasticizer, 1 part of phosphite; Wherein, starch is the mixture of corn starch, potato starch and tapioca starch, and the weight ratio of corn starch, potato starch and tapioca starch is 2 :1:1; the plasticizer is epoxidized soybean oil.

[0026] A preparation method of a biodegradable polylactic acid film, specifically comprising the following steps:

[0027] (1) take by weighing the raw material of corresponding weight portion respectively, polylactic acid, polybutylene carbonate, polyethylene, starch, zinc stearate, magnesium oxide, vermiculite powder, kaolin, plasticizer and phosphite are added to the mixing In the machine, the heating temperature i...

Embodiment 2

[0032] A biodegradable polylactic acid film is composed of the following raw materials by weight: 90 parts of polylactic acid, 15 parts of polybutylene carbonate, 25 parts of polyethylene, 32 parts of starch, 8 parts of zinc stearate, and 12 parts of magnesium oxide , 10 parts of vermiculite powder, 15 parts of kaolin, 6 parts of plasticizer, 5 parts of phosphite; Wherein, starch is the mixture of corn starch, potato starch and tapioca, and the weight ratio of corn starch, potato starch and tapioca is 2 :1:1; the plasticizer is epoxidized soybean oil.

[0033] A preparation method of a biodegradable polylactic acid film, specifically comprising the following steps:

[0034] (1) take by weighing the raw material of corresponding weight portion respectively, polylactic acid, polybutylene carbonate, polyethylene, starch, zinc stearate, magnesium oxide, vermiculite powder, kaolin, plasticizer and phosphite are added to the mixing In the machine, the heating temperature is 90°C, t...

Embodiment 3

[0039] A biodegradable polylactic acid film is composed of the following raw materials by weight: 70 parts of polylactic acid, 10 parts of polybutylene carbonate, 12 parts of polyethylene, 25 parts of starch, 3 parts of zinc stearate, and 7 parts of magnesium oxide , 7 parts of vermiculite powder, 8 parts of kaolin, 3 parts of plasticizer, 1.5 parts of phosphite; Wherein, starch is the mixture of corn starch, potato starch and tapioca, and the weight ratio of corn starch, potato starch and tapioca is 2 :1:1; the plasticizer is epoxidized soybean oil.

[0040] A preparation method of a biodegradable polylactic acid film, specifically comprising the following steps:

[0041] (1) take by weighing the raw material of corresponding weight portion respectively, polylactic acid, polybutylene carbonate, polyethylene, starch, zinc stearate, magnesium oxide, vermiculite powder, kaolin, plasticizer and phosphite are added to the mixing In the machine, the heating temperature is 80°C, th...

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Abstract

The invention relates to a biodegradable polylactic acid film and a preparation method thereof. The biodegradable polylactic acid film comprises the following raw materials in parts by weight: 65 to 90 parts of polylactic acid, 8 to 15 parts of polybutylene glycol carbonate, 10 to 25 parts of polyethylene, 25 to 32 parts of starch, 3 to 8 parts of zinc stearate, 6 to 12 parts of magnesium oxide, 5 to 10 parts of vermiculite powder, 6 to 15 parts of Kaolin, 2 to 6 parts of plasticizers and 1 to 5 parts of phosphite. According to the film disclosed by the invention, polylactic acid is used as a main raw material, Kaolin and vermiculite powder are used as bioactivators, and zinc stearate is used as a thermal oxidative degradation accelerant, so that photodegradation can be carried out on the film under illumination conditions, thermal degradation further can be carried out on the film by using heat accumulated inside compost, and magnesium oxide is added to improve the strength and toughness of the film; phosphite is added, so that the heat insulation performance of the film is enhanced. The film disclosed by the invention is simple and convenient in processing technology, low in requirement for mechanical equipments and good in economic benefit.

Description

technical field [0001] The invention mainly relates to the technical field of film products, in particular to a biodegradable polylactic acid film and a preparation method thereof. Background technique [0002] Plastics have been rapidly developed and widely used in the packaging field since the 1970s due to their light weight, high strength and low price, such as plastic bags, food packaging boxes and beverage packaging. However, due to the chemical stability of general-purpose plastics, when they are abandoned, they will exist stably in the environment for a long time, resulting in the accumulation of a large number of plastic wastes in the environment, which will bring serious harm to the environment, such as white pollution, agricultural white cancer And other issues. With the increasingly prominent environmental problems and the continuous improvement of human awareness of environmental protection, the disposal of plastic waste has become the focus of extensive attenti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L69/00C08L23/06C08L3/02C08L91/00C08K13/02C08K5/098C08K3/22C08K3/34
CPCC08L67/04C08J5/18C08J2367/04C08J2403/02C08J2423/06C08L2201/06C08L2201/08C08L2203/16C08L2205/025C08L2205/035
Inventor 程明程珉淅洪柳根
Owner 安徽明诚塑业有限公司
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