Environment-protective packaging film and preparation thereof

A packaging film and environmental protection technology, applied in the field of environmental protection packaging film and its preparation, can solve the problems of insufficient tensile strength, insufficient transparency, difficult application, etc., and achieve the effects of convenient material acquisition, wide application range and low price

Inactive Publication Date: 2008-11-05
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the tensile strength of the film is not enough
[0005] The transparency of the above-mentioned various films is not enough, the tensile strength is not enough, it is difficult to put into practical application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0016] Embodiment: a kind of preparation method of environment-friendly packaging film is made up of the following steps:

[0017] (1) Purification of konjac fine powder: get 30g of konjac fine powder and put in a beaker and wash with 50% ethanol immersion, pour into the colloid mill and grind for 10 minutes, then fully moisten with 95% ethanol, dehydrate and wash 3 times, and then use absolute ethanol Soak for 15 minutes, then suction filter until no water drips out, and finally put the product in a blast drying oven, dry at 70°C until the water content is 1.5%, and take it out. At this time, the powder is loose and does not form agglomerates. The consumption of described various concentration ethanol is all 2 times of konjaku powder volume.

[0018] (2) Take 1L of water and heat it to 75°C, add 1ml of glycerin to the hot water and place it on a digital constant temperature magnetic stirrer at a constant temperature to stir at a speed of 1200r / min, and add 6g of KGM, 4g of ca...

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PUM

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Abstract

An environmental protection packing film of the invention is prepared by konjac glucomannan, carrageenan, glycerine, sucrose fatty acid ester and water; the tensile strength, elongation at break, flexibility and transparency etc. of the invention are superior to like products; and the invention also has advantages of convenient access of materials and low price. The environment protection packing film is non-toxic and does no harm to health even eaten by mistake, thus giving more safety with packing food. Furthermore, transmittance and selectivity are different to different types of gas molecules, selective separation is provided for gases, and oxygen can pass through the film faster than carbon dioxide. The invention is used for packing fruits and vegetables, the proportion of CO2\O2 in the packing bag is gradually increased, which can effectively inhibit respiration of fruits and vegetables and reduce metabolism and senescence.

Description

[0001] Technical field The present invention relates to a packaging film and a preparation method thereof, in particular to a pollution-free and environment-friendly packaging film and a preparation method thereof. Background technique [0002] In view of the huge negative impact of traditional plastic packaging films on environmental resources and human health, paper products or fully biodegradable plastics are also introduced on the market. Although they are completely biodegradable and environmentally friendly, they are expensive. For For disposable packaging materials with large demand, it is difficult to be accepted by the market, which is not conducive to their promotion and application. Therefore, the development of a low-cost, environmentally friendly, and widely used biopolymer membrane will have broad market prospects. In recent years, the research on new products of various environmental-friendly and energy-saving biopolymer membranes has attracted much attention, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/02C08K5/053C08K5/10C08J5/18B65D65/38B65D81/24C08L5/00C08L5/12
Inventor 庞杰陈缘缘彭述辉陈艺勤余庞熔
Owner FUJIAN AGRI & FORESTRY UNIV
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