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Plant fibre reinforced biodegradable film material and preparation thereof

A technology for biodegradable plastics and plant fibers, applied in the field of production of degradable film materials, can solve the problems of reducing radiation processing cost, and achieve the effects of low radiation processing cost, good heat sealing performance and low cost

Inactive Publication Date: 2009-05-20
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous rise of oil prices and the reduction of radiation processing costs, it is possible to use radiation-modified starch technology to prepare biodegradable films for industrial application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 5 kg of 80-mesh cornstarch, 3.5 kg of methyl methacrylate, and 450 g of water, mix well, and then irradiate 0.5 kGy, 1 kGy, 3 kGy, 5 kGy, 10 kGy, and 20 kGy with a cobalt source. Combine the irradiated material with 2kg of 100 mesh bagasse, 3kg of ethylene vinyl alcohol copolymer, 1.5kg of plasticizer ethylene glycol succinate, and 50g of heat stabilizer epoxy soybean oil, and put them into a high-speed mixer Stir evenly, then add the heating temperature of the 8 zones in the twin-screw machine (Haake, PTW--24) with 8 zones heating respectively 120, 140, 160, 180, 195, 190, 180, 180 °C, and the extruded material After being cooled by cold water, the strips were granulated with a granulator, and the prepared masterbatch was dried in a vacuum oven for 48 hours, and single-screw blow molding was used to form a film (single-screw is Haake-252P), and the heating temperature in the four zones was 140, 170 , 190, 180°C, head temperature is 175°C).

Embodiment 2

[0026] Material weight ratio and processing technology are with embodiment 1, and wherein cornstarch is changed into potato.

Embodiment 3

[0028] Material weight ratio and processing technology are with embodiment 1, and wherein cornstarch is changed into wheatstarch.

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Abstract

The invention relates to a biodegradable thin-film material strengthened by plant fibers and a preparation method thereof. Raw materials and parts by weight thereof used are as follows: 20 parts to 45 parts of plant fibers, 30 parts to 50 parts of starch, 20 parts to 35 parts of vinyl monomers, 20 parts to 30 parts of biodegradable plastics, 10 parts to 15 parts of plasticizers, 3 parts to 5 parts of water and 0.5 part to 3 parts of heat stabilizers. The preparation method of the thin-film material comprises the steps: the plant fibers, starch, vinyl monomers and water of certain quantities are evenly mixed and radiated by a cobalt Gamma 60 source or an electron accelerator for 0.5kGy to 20kGy; the material after radiation is mixed with the biodegradable plastics, the plasticizers and the heat stabilizers; then a twin screw is used for preparing a thin-film special material; and finally the thin-film is formed by means of blow molding using a single screw. The completely biodegradable thin-film has good water resistance and heat combination performance and is applicable to producing farming terra films and packing films so as to solve the white pollution problem caused by the heavy use of oil-based plastic.

Description

technical field [0001] The invention relates to a material and a process for producing a degradable film, more specifically, a low-cost plant fiber reinforced biodegradable film material and a preparation method thereof. Background technique [0002] In recent years, as people pay more and more attention to resources and environmental issues, it has become the focus of research to produce fully biodegradable membrane products from renewable resources, which can be decomposed into water and carbon dioxide by microorganisms in a natural state after use. Among them, starch has become a worldwide research and development hotspot due to its wide range of sources and low price. [0003] At first, people focused on thermoplastics and starch-blended biodegradable plastics with Griffin, C.J.L. (Adv, Chem, Sci, 134 (1974) 159-170) technology as the core. Biodegradation, while other thermoplastic resins (such as PE, etc.) are still not biodegradable after use, so this type of material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/02C08J5/18C08J5/04C08L67/04
Inventor 张万喜王庆伟张研李海红张春哓王昕李秀梅王庆勇
Owner JILIN NORMAL UNIV
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