High-strength water-resistance soy protein isolate packing film, and its preparing method and use

A technology of soybean protein isolate and packaging film, which is applied in packaging food, milk packaging, dairy product packaging, etc., can solve the problems of limited application, low mechanical strength of the film, poor water resistance, etc., and solve the problems of low mechanical strength, low production cost, Good water resistance

Inactive Publication Date: 2007-06-13
TIANJIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low mechanical strength and poor water resistance of the film prepared by pure soybean protein

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0014] Example 1: the contents of each component are as follows:

[0015] water 100g

[0016] Soy Protein Isolate 25g

[0017] Glycerin 7 grams

[0018] Stearic acid 3 grams

[0019] Polyvinyl alcohol 4 grams

[0020] Glyoxal 1 g

[0021] Zinc sulfate 0.2 g

[0022] Add the above-mentioned soybean protein isolate, glycerin, stearic acid, and polyvinyl alcohol into the above-mentioned water, stir and mix evenly, and dissolve at 80°C for 40 minutes; add sodium hydroxide to adjust the pH of the solution to 8-8.5; then add glyoxal and zinc sulfate, mix well for 30 minutes. Films are then produced by coating methods. After the film is dried at room temperature, the yellow transparent soy protein isolate film can be obtained.

[0023] The soybean protein isolate used in the present invention was purchased from Harbin Harbin Hi-Tech Co., Ltd., and other reagents were all commercially available without any treatment.

example 2

[0024] Example 2: the contents of each component are as follows:

[0025] water 100g

[0026] Soy Protein Isolate 25g

[0027] Glycerin 5 grams

[0028] Stearic acid 4 grams

[0029] Polyvinyl alcohol 5 grams

[0030] Glyoxal 1 g

[0031] Zinc sulfate 0.2 g

[0032] Utilizing the contents of the above components, according to the preparation method described in Example 1, a yellow transparent soybean protein isolate film was prepared.

example 3

[0033] Example 3: the contents of each component are as follows:

[0034] water 100g

[0035] 20g soy protein isolate

[0036] Glycerin 8 grams

[0037] Stearic acid 5 g

[0038] Polyvinyl alcohol 8 grams

[0039] Glyoxal 2 g

[0040] Zinc sulfate 0.2 g

[0041] Utilizing the contents of the above components, according to the preparation method described in Example 1, a yellow transparent soybean protein isolate film was prepared.

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Abstract

This invention discloses a kind of soy protein isolate packaging film with water resistance and high-strength and its preparation method. By dissolving the soy protein isolate bought from the market, glycerine, stearic acid, filmogen and elasticizer into water which contain the following constituents by weight: water in 100 portions, soy protein isolate in 20-40 portions and polyvinyl alcohol in 8-12 portions, and then the film materials are formed by coating method. The said film has advantages of high strength, water resistance, simple preparation technique, low price, no pollution to environment and so on. It can be used in package of meat product, dried food, sour milk, medicinal powder and food ingredients, as well as preservative package for vegetables and fruits.

Description

technical field [0001] The invention relates to a high-strength water-resistant soybean protein isolate film material, which belongs to food and medicine packaging materials in the field of polymer materials. Background technique [0002] In recent years, with the development of the economy and the improvement of people's living standards, the environmental pollution caused by plastic packaging discards of consumer goods has attracted more and more attention. Traditional plastic products take hundreds of years to degrade; and the recycling and reuse of plastic waste consumes a lot of manpower and material resources. Soy protein isolate is a completely degradable natural polymer with a wide range of raw materials and easy film formation. (H. J. Sue, S. Wang, P01ymer 38 (1997) 5035-5045). Protein packaging film is a new green packaging material. However, due to the low mechanical strength and poor water resistance of the film prepared by pure soybean protein isolate, its ap...

Claims

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Application Information

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IPC IPC(8): C08L89/00C08J5/18B65D85/80
Inventor 苏峻峰黄震腾立军石岩郭玉花计宏伟
Owner TIANJIN UNIV OF COMMERCE
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