Fruit-vegetable fresh-retaining film, and its production method and equipment

Abstract

This invention refers to the preservative film for fruits and vegetables, the method and the equipment. It is to spread a coat of preservative material on the ordinary sheet film and the preservative material includes the film forming matter, organic acid, sterilization preservative, bond and active chemicals, endows the preservative film with antibiotic antiseptic property and adjusting the properties of air and water freely to the preservation environment and makes the ordinary sheet film a kind of preservative film with special preservative function. Its equipment includes pressure roller, rolling machine, surface treatment installation, bracket and tectorial membrane implement. Behind the original velum there is a two-class pressure roller, then surface treatment installation and tectorial membrane implement. On the both side of the tectorial membrane implement there are supporting rollers. The last is a rolling machine, which is driven by an electromotor. This kind of preservative film has good functioning and the production procedure is fully automatic.

Description

technical field [0001] The invention relates to a fresh-keeping film for fruits and vegetables, a production method and equipment thereof. Background technique [0002] At present, the fruit and vegetable plastic wraps used in China are generally based on polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC) and other polymers, and are made by adding some plasticizers, inorganic fillers, antibacterial agents, etc. formed film. However, some active materials cannot be added to the mixer, especially organic antibacterial agents are prone to chemical changes during high-temperature mixing, thereby changing their antibacterial properties. There is no commercialized functional fresh-keeping material for fruits and vegetables in China. Various fresh-keeping materials such as edible fresh-keeping film, silicon window PE bag packaging, and microporous film have been developed abroad. Foreign fresh-keeping films generally adjust the moisture permeability and air permeabi...

AI Technical Summary

Problems solved by technology

However, the preservative films made now are generally blow-molded or coated with some preservative materials by hand on the finished film. Although the preservative film formed by blow molding can better adjust the gas ratio of the microenvironment for fruit and vegetable storage, it has a certain fresh-keeping effect. , but deficient in antibacterial aspects; the operation speed of manual coating film is slow, the efficiency is low, and the product quality is unstable

When conducting scientific and technological literature retrieval and market research, we have not seen any mechanical or automatic fresh-keeping material coating devices and equipment to produce fruit and vegetable plastic wrap.

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