Novel degradable plastic bag and preparation method thereof

Abstract

The invention discloses a novel degradable plastic bag and a preparation method thereof. The novel degradable plastic bag is prepared from the following raw materials in parts by weight: 60-70 parts of cassava starch, 30-40 parts of polyvinyl alcohol, 15-20 parts of sisal hemp fibers, 10-15 parts of ramie fibers, 7-15 parts of banana fibers, 30-40 parts of a clouding agent, 0.2-0.5 part of a cross-linking agent, 0.1-0.2 part of cactuses, 0.2-0.4 part of rosemary, 0.2-0.3 part of gingkoes, 0.1-0.2 part of cardamoms and 0.3-0.4 part of bamboo leaves. According to the novel degradable plastic bag, dried grafting fibers and mixed extract are prepared respectively, and than are highly mixed with the cassava starch, the clouding agent and the cross-linking agent and then internally mixed and molded; and different plant fibers and different properties of the mixed extract are compressively utilized, so that the preparation method has the beneficial effects that the mechanical properties and environment resistance of the degradable plastic bag are effectively improved.

Description

technical field [0001] The invention relates to a degradable plastic bag. More specifically, the present invention relates to a novel degradable plastic bag and its preparation method. Background technique [0002] Plastic bags are essential items in people's daily life and are often used to hold other items. It is widely used because of its low cost, extremely light weight, large capacity, and easy storage, but it is banned from use and production in some countries because of the extremely long degradation cycle and difficult disposal of plastic bags. The use of biodegradable starch materials and natural fibers to prepare degradable plastic bags has become a research hotspot around the world. However, starch materials and natural fibers also have many problems while improving the degradable performance of plastics. On the one hand, they will cause a decline in their physical and mechanical properties, low mechanical properties, insufficient load-bearing pressure, and cann...

AI Technical Summary

Problems solved by technology

However, starch materials and natural fibers also have many problems while improving the degradable performance of plastics. On the one hand, they will cause a decline in their physical and mechanical properties, low mechanical properties, insufficient load-bearing pressure, and cannot be used and carried repeatedly. It is too strong and has poor compatibility with most general-purpose resins, resulting in a significant drop in the mechanical properties of the film and poor water resistance. On the other hand, natural fibers are less environmentally resistant than glass fibers. Poor properties, such as poor antimicrobial properties, hinder the wide application of plastics made from starch and natural fibers in the process of industrialization

[0003] At present, in the existing plastic bag manufacturing process, in order to improve the quality of plastic bags, chemical tougheners will be added to the produced plastic bags to increase the toughness of plastic bags, but too much chemical tougheners are difficult to degrade and will affect the environment. It has a certain impact, and the addition of chemical components also has certain side effects, which will have a certain impact on the human body and seriously affect people's lives.

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