Waterproof and antibacterial packaging film and preparation process thereof

Abstract

The invention discloses a waterproof and antibacterial packaging film and a preparation process thereof, and belongs to the technical field of packaging materials. The waterproof and antibacterial packaging film comprises low density polyethylene, polylactic acid, modified bamboo fibers, calcium carbonate, oleic acid, alginate, an antibacterial agent and other components. The preparation process comprises the steps of material preparation, material mixing, extrusion granulation, film casting and the like. The waterproof and antibacterial packaging film adopts The low density polyethylene, thepolylactic acid and the modified bamboo fibers as main raw materials, so that the waterproof and antibacterial packaging film has good waterproof and oxygen-isolating functions, is biodegradable, hasno pollution to the environment, has continuous antibacterial ability, inhibits or prevents microbial growth, has very good barrier property on moisture and oxygen, and is suitable for packaging foodsand medicines. The preparation process is simple in flow, the film is formed by an extrusion casting method, a multilayer co-extrusion method is not needed for processing, the equipment investment issmall, and the preparation process is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a waterproof and antibacterial antibacterial packaging film and a preparation process thereof. Background technique [0002] The safety and sanitation of food and medicine are directly related to people's life and health, so selecting suitable packaging materials is one of the important links to ensure the quality of food and medicine. The barrier performance of packaging materials is a key factor affecting the packaging effect. Usually, the main reasons for the deterioration of packaging contents are the attack of moisture and oxygen, the exposure of visible light and the contamination of microorganisms. Moisture causes microorganisms to multiply, oxygen causes the content to oxidize and deteriorate, and some foods and medicines will decompose and become invalid when exposed to light. Good barrier properties of packaging materials can ensure that the contents mainta...

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Problems solved by technology

Therefore, the packaging film is usually processed by multi-layer co-extrusion method, which requires large equipment investment and complicated production process, resulting in high production cost of the packaging film.

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