Plant fibre reinforced biodegradable film material and preparation thereof

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...