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Biodegradable temperature resistant material containing fiber base and polylactic acid and preparation method thereof

A technology of biodegradable and temperature-resistant materials, applied in the direction of disks, etc., can solve the problems of high cost and poor temperature resistance, achieve good temperature resistance, solve the problem of white pollution, and reduce manufacturing costs

Inactive Publication Date: 2012-10-24
HUIZHOU JIAN SHENG PLASTIC MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the shortcomings of poor heat resistance and high cost of existing degradable materials, the present invention provides a biodegradable heat-resistant material containing fiber base and polylactic acid and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take a total of 35KG of peanut shell powder and bamboo powder in an equal weight ratio, dry them, and add 50KG of polylactic acid after hydrophobic treatment for 2-4 hours, and a mixture of sorbitol, graphite, and silane coupling agent in an equal weight ratio. The specific heat stabilizer, titanium dioxide mixture is 5KG in total, and the initiator is 5KG, mixed in a high-speed mixer with a rotation speed of 800-1500 rpm, and the blending temperature is controlled at 105°C, and then the mixture is added to the twin-screw The extruder forms and heats the formed product. The heating temperature is controlled at 130°C and the time is controlled at 20 seconds; then the generated product is cooled, and finally the film is blown in the film blowing machine to make the product. The temperature is 150°C, and the maximum temperature resistance of its blow molded products can reach 108°C.

Embodiment 2

[0022] Take a total of 40KG of wheat straw powder and corn straw powder in an equal weight ratio and dry them for 2-4 hours, then add 40KG of polylactic acid, sorbitol, epoxy soybean oil, maleic anhydride, and silane coupling A total of 10KG of the mixture composed of whitening agent and citric acid ester, a total of 6KG of the mixture composed of whitening agent, heat stabilizer and calcium carbonate in equal weight ratio, and 4KG of the inducer are mixed evenly in a high-speed mixer with a rotating speed of 500-1500 rpm , the blending temperature is 85°C, then the compound is added to the twin-screw extruder for molding, and the shaped product is heated, the heating temperature is controlled at 120°C, and the time is controlled at 10 seconds; then the resulting product is cooled , and then in the blister machine, the temperature of the blister is 140°C, and the fiber-based biodegradable lunch box with a thickness of 1.10mm is produced. The maximum temperature resistance of th...

Embodiment 3

[0024] Take a total of 40KG of corn cob powder and peanut shell powder in an equal weight ratio and dry them for 2-4 hours, then add 45KG of polylactic acid, glyceride, epoxy soybean oil, graphite, mineral oil, The mixture of acid anhydride, silane coupling agent, citric acid ester and sorbitol is 6KG in total, and the mixture of antioxidant and calcium carbonate in equal weight ratio is 5KG in total. Blend uniformly in the mixer, the blending temperature is 75°C, then add the compound into the twin-screw extruder to form, and heat the formed product, the heating temperature is controlled at 140°C, and the time is controlled at 25 seconds; then the The resulting product is cooled and then blistered in a blister machine at a temperature of 140°C to produce a fiber-based biodegradable lunch box with a thickness of 1.10mm. The maximum temperature resistance of the blistered product can reach 105°C.

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Abstract

The invention relates to biodegradable temperature resistant material containing fiber base and polylactic acid and a preparation method thereof. The material prepared disclosed by the invention is obtained by mixing the following raw materials by weight: 30%-60% of polylactic acid, 30%-50% of fiber powder, 5%-20% of crosslinking modifier, 5%-10% of additive, 1%-10% of inducer. The preparation method comprises the following steps of drying and carrying out hydrophobic treatment to the fiber powder for 2-4 hours firstly; mixing the fiber powder, the crosslinking modifier, the additive and the inducer in a high-speed mixer uniformly and controlling the temperature below 110 DEG C; molding a mixer by an extruder and heating the molded product at the heating temperature of 105-150 DEG C for 10-30 seconds; and cooling the generated product to obtain the finished product. The material prepared by the method has the advantages of good temperature resistance property, wide range of application and low production cost, is fully biodegradable, and can beapplied to biodegradable lunch boxes, thereby solving the white pollution problem caused by the extensive use of petroleum-based plastic.

Description

technical field [0001] The invention relates to a biodegradable material, in particular to a biodegradable heat-resistant material containing fiber base and polylactic acid and a preparation method thereof. Background technique [0002] The existing degradable materials include Ecoflex produced in Germany. Its raw material is petroleum-based, and its temperature resistance can reach up to 350°C. However, its raw material is petroleum-based, has poor degradation ability, and is very expensive. It is PLA / PBS / PHA and mixed with other plastics. Its temperature resistance can reach up to 80°C, and its cost is relatively expensive, but it is lower than the cost of Ecoflex produced in Germany. Only PLA products produced in the United States are bio-based. The material, the raw material is corn starch, its temperature resistance can only reach 50°C, and it will deform if it exceeds 50°C. The degradable material produced by Wuhan Huali uses PLA and starch as its raw materials, and i...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/02C08K13/02C08K5/053C08K3/04C08K3/22C08K5/1515C08K5/09C08K5/12C08K3/26B29C55/28A47G19/03
CPCC08L2201/06C08J5/18C08J2367/04B29C47/0004C08J5/045C08L67/04B29C47/88B29C48/022B29C48/08B29C48/10B29C48/91C08L97/02C08L99/00C08L3/02
Inventor 杨建
Owner HUIZHOU JIAN SHENG PLASTIC MFG
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