Biodegradable bacteriostatic film with high mechanical properties and preparation process thereof

Abstract

The invention discloses a biodegradable antibacterial film with high mechanical properties and a preparation process thereof. The biodegradable antibacterial film is prepared from polyethylene, polylactic acid, deformed starch, wheat straw, wood fiber, Pullulan oxidized polyethylene wax, polysorbate, a toughening agent, bamboo charcoal powder, a heat stabilizer, milled long-grain glutinous rice flour, Chinese medical stone, kaolin, anhydrous sodium sulfate, coconut shell powder, poly(butylene succinate) and polyester fibers. The prepared film has a degrading function and high degradation efficiency, so the problem that conventional plastic films are difficult to degrade and pollute the environment is overcome; the film is also endowed with good antibacterial effect and tensile strength, sothe film can elongate under the stretching by external force, is increased in the elongation at break and is protected from dimensional changes caused by the increase of temperature. In addition, thepreparation process of the invention is simple in operation, high in production efficiency, convenient for processing and molding, endows a film product with antibacterial and environmental protection effects, and can be used for industrial large-scale production.

Description

technical field [0001] The invention relates to the field of films, in particular to a biodegradable antibacterial film with high mechanical properties and a preparation process thereof. Background technique [0002] With the acceleration of people's life rhythm and the improvement of health consumption awareness, fresh-cut fruits and vegetables that are natural, nutritious, fresh, convenient and highly available are increasingly favored by consumers all over the world, and the demand is increasing day by day. Fresh-cut fruits and vegetables are ready-to-eat foods that have been trimmed, peeled and cut. Since fresh-cut fruits and vegetables are still undergoing vigorous metabolic activities, their nutritional value and flavor will decrease rapidly with the evaporation of water and their own metabolic activities. Due to its high water content and nutrients such as sugar, it is easy to cause the growth of microorganisms. Therefore, in order to maintain the quality of fresh-cu...

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Problems solved by technology

[0003] At present, traditional plastic films, such as polyethylene, polypropylene, polyvinyl chloride and other films, have excellent tensile strength and mechanical strength, and are good packaging materials. However, plastic films of this material are difficult to degrade and cause serious pollution. Plastic "white pollution" threatens the ecological environment and is a worldwide problem

Because of the above-mentioned shortcomings of traditional plastics, starch-degradable films emerged as the times require. Films of this material have good degradable properties, but due to the poor strength and stretchability of starch-degradable plastics, it is difficult to promote them on a large scale.

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