Fully-degradable plastic film with enhanced mechanical property and manufacturing method of fully-degradable plastic film

Abstract

The invention discloses a fully-degradable plastic film with enhanced mechanical property. The plastic film is characterized by being made from the following raw materials, by weight part, 80-85 of polylactic acid, 25-30 of hemp fibers, 0.8-1 of a silane coupling agent kh-550, 20-25 of corn starch, 12-14 of glycerin, 1.6-2 of epichlorohydrin, a proper amount of a sodium hydroxide solution with the concentration being 1 mol / L, a proper amount of hydrochloric acid with the concentration being 1 mol / L, a proper amount of distilled water, 1-1.5 of epoxidized soybean oil, 5-7 of natural latex, 2-3 of butyl lactate and 3-5 of bamboo fibers. The manufactured fully-degradable plastic film is good in toughness and mechanical property, is easy to degrade in a natural condition, and is safe and eco-friendly. The manufacturing method is innovative in process and convenient for industrial control. The fully-degradable plastic film can be widely applied to packages for food and daily necessities. The plastic film is safe and eco-friendly, can be fully degraded, and is high in degradation speed.

Description

technical field [0001] The invention relates to the technical field of plastic films, in particular to a fully degradable plastic film with enhanced mechanical properties and a preparation method thereof. Background technique [0002] In order to reduce the use of petroleum-based plastic materials, protect the environment, and alleviate the increasingly severe shortage of petroleum resources, the development and utilization of bio-based degradable and environmentally friendly plastic materials has become the focus of research in the field of packaging materials. [0003] Polylactic acid material is one of the most widely used degradable plastic materials at present. As a packaging film material, PLA has good transparency, mechanical properties and biocompatibility, high strength, thermoplasticity, hydrophobicity, easy molding and processing, and can be completely Degradation, the degradation products are non-toxic and harmless to the human body, come from renewable resources...

AI Technical Summary

Problems solved by technology

In the present invention, the silane coupling agent kh-550 is used to pretreat the hemp fiber, thereby improving the interface contact effect and compatibility, and improving the mechanical properties of the material; then modifying the cornstarch through a series of processes and adding In the overall product, it solves the problem of poor compatibility with polylactic acid. At the same time, with the addition of natural latex, butyl lactate and other ingredients, it can further improve the strength and toughness of the composite material, and at the same time greatly reduce the overall cost of the product. Contribute to the promotion and application of fully biodegradable plastics