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

A technology of fruit and vegetable fresh-keeping and fresh-keeping materials, which is applied in food preservation, food science, application, etc. It can solve the problems of unstable product quality, lack of antibacterial, slow manual coating operation, etc., and achieve superior product performance and improved work efficiency. Effect

Inactive Publication Date: 2005-02-16
GUANGXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 antibacter

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: get thickness and be 0.005mm polyethylene film 1000 square meters, modified starch 20kg, lecithin 10g, sucrose ester 15g, citric acid 5 grams, carbendazim 10g, after punching on the preservative film production equipment, through The sucrose ester aqueous solution is used for surface treatment, and the mixture of modified starch and lecithin is evenly coated on the surface of the treated film to obtain a fresh-keeping film with fruit freshness preservation function, and the storage time of mangoes packed with the fresh-keeping film can be extended by more than 50%.

Embodiment 2

[0027] Embodiment 2: get thickness and be 1000 square meters of high and low pressure polyethylene (blend) film of 0.005mm, water-based polyacrylate adhesive 10kg, carboxymethyl cellulose 5kg, dimethyl fumarate 10g, sucrose 5kg, silica bath soil 3kg, after carrying out surface treatment through aqueous polyacrylate solution on the preservative film production equipment, the mixture of carboxymethyl cellulose, dimethyl fumarate and silicon bath soil is evenly coated on the film surface that has been processed, obtains The fresh-keeping film has the function of keeping fruit fresh, and the storage time of citrus packed with the fresh-keeping film can be extended by more than 50%.

Embodiment 3

[0028] Embodiment 3: getting thickness is 1000 square meters of high-pressure polyethylene film of 0.01mm, polyvinyl alcohol starch glue 15kg, chitosan and its modified substance 1.5kg, green fresh element 5g, ascorbic acid 1kg, oxalic acid 0.5kg, in fresh-keeping After the surface physical treatment is carried out on the film production equipment, it is first coated with polyvinyl alcohol starch glue, and then the remaining substances are made into a solution and evenly coated on the surface of the treated film to obtain a fresh-keeping film with fruit freshness preservation. The storage time of litchi packed in plastic wrap can be extended by more than 50%.

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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...

Claims

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Application Information

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IPC IPC(8): A23L3/00C08J7/04
Inventor 林宝凤梁兴泉
Owner GUANGXI UNIV
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