Insect-preventing air-conditioning preservative film for food

Abstract

A vermin-proof modified atmosphere preservative film for foodstuff is prepared by the following steps: by taking sumithion, Chuliangan and pepper dextrin, polyethylene wax, an antistatic agent, a lubricant, calcium carbonate, a titanate coupling agent, a plasticizer and low density polyethylene resin as raw materials; coating and dispersing, melt blending, extruding and granulating to prepare vermifugal master batches; and then adding the vermifugal master batches to the low density polyethylene resin at a ratio of 10-15% for film blowing and forming. The film can be used for producing bags with certain specifications for storing foodstuff; due to slow release of vermicide in the film and combination with spontaneous modified atmosphere physical vermin-proof property of foodstuff respiration, compared with the low density polyethylene film with the same thickness, the film has obvious repelling effect on imago of stored grain pests such as maize weevil, lesser grain borer and confused flour beetle; no residue of the vermicide is detected after packaging rice, maize and wheat for 3 months, the film has no food safety problem as a packaging material for food and is a common, safe, high-efficiency and low cost vermin-proof storage manner for foodstuff.

Description

technical field [0001] The invention belongs to a preparation method of a novel functional plastic packaging film, in particular to a grain insect-proof modified-atmosphere preservative film combined with an insect-repelling function and a spontaneous modified atmosphere of grain and a preparation method thereof. Background technique [0002] In the process of grain storage, grain is often harmed by stored grain pests, and the loss is quite serious. The annual loss caused by pests in our country is about 3%-5% of the total grain output, and the stored grain in some underdeveloped areas can cause 10%-40% loss due to pests every year. Stored grain pests not only eat grains and increase grain loss, but also reduce the edible quality and nutritional value of grains. In recent years, countries all over the world have attached great importance to the control of stored grain pests. Great progress has been made in the research and development of new stored grain insecticides, grai...

AI Technical Summary

Problems solved by technology

For example, the production process of composite plastic film is complicated and the cost is high, and insecticides such as storage grain safety are directly mixed into the grain, which has certain pollution to the grain. Residues also have certain negative effects on human health

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