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Method for preparing three-layer plastic compound film used for packaging food

A composite film and plastic technology, applied in packaging, wrapping paper, transportation and packaging, etc., can solve problems such as unfavorable production for small and medium-sized enterprises, high cost, complex production process, etc., and achieve easy control, reduced production costs, and simple production processes. Effect

Inactive Publication Date: 2010-06-23
哈达
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0002] In order to meet the performance requirements of packaging various foods, there are many kinds of plastic composite films produced at home and abroad, and the number of composite layers ranges from double to five or six layers. Although the performance is excellent, its cost is high and the production process is complicated, which is not conducive to small and medium-sized enterprises. Production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0008] Put some polyvinyl alcohol into a reaction kettle with a thermometer, a stirrer and a reflux condenser, and then add deionized water of the same quality. Stir at 150°C for 3 hours to dissolve all the polyvinyl alcohol in deionized water, and filter out insoluble matter at 50°C.

[0009] The 40μ polypropylene film passes through the spraying machine at a speed of 8-10 cm / s, sprays about 50% polyvinyl alcohol aqueous solution, and passes through ultrasonic waves at the same speed to make the polyvinyl alcohol solution evenly adhere to the polypropylene film, and press it A layer of 40μ polyethylene film can be passed through the laminating machine at the same speed at 120°C.

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PUM

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Abstract

The invention provides a method for preparing a three-layer plastic compound film used for packaging food. The method is characterized by comprising the following steps of: spreading a polypropylene film, spraying aqueous solution of polyvinyl alcohol and making the aqueous solution of polyvinyl alcohol uniformly coated on the polypropylene film by using a supersonic machine, pressing another polypropylene film on the aqueous solution of polyvinyl alcohol to form the three-layer film, and making the three-layer film pass through a film pressing machine at the temperature of 120 DEG C to obtain the three-layer plastic compound film. The three-layer plastic compound film has the characteristics of low cost, high strength, no toxin, easy heat sealing, high oxygen insulation and moisture resistance and the like, and is suitable to be used for packaging sausages, preserved pork and hot pickled mustard tuber, particularly peanuts and deep fried crispy foods; and the food packaged by the three-layer plastic compound film can be stored for over half a year without going bad, the raw materials and equipment are based on domestic markets, and the cost is low, so that the three-layer plastic compound film is suitable to be produced by small- and medium-sized enterprises.

Description

technical field [0001] The invention belongs to a preparation method of a three-layer plastic composite film for packaging food. Background technique [0002] In order to meet the performance requirements of packaging various foods, there are many kinds of plastic composite films produced at home and abroad, and the number of composite layers ranges from double to five or six layers. Although the performance is excellent, its cost is high and the production process is complicated, which is not conducive to small and medium-sized enterprises. Production. Contents of the invention [0003] The object of the present invention is to provide a low-cost, high oxygen barrier and moisture-proof three-layer plastic composite film preparation method for the deficiencies of the prior art. [0004] One of the key technologies of the present invention is to select a polyvinyl alcohol aqueous solution instead of a toxic methanol solution to make a composite packaging film, and to make ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32C08J7/04B32B37/10B32B37/06B65D65/40
Inventor 哈达
Owner 哈达
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