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Edible packing membrane, and its preparing method and use

A packaging film, edible technology, applied in the field of edible packaging film and its preparation, can solve the problems of limitation and high cost of gelatin, and achieve the effects of easy sealing and high nutritional value

Active Publication Date: 2006-03-08
BAOTOU DONGBAO BIO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of edible packaging film provided by Chinese Patent Publication No. CN1095033A is prepared by protein and other food additives. This application mainly uses gelatin etc. to prepare edible packaging film. Gelatin film has good mechanical properties, but the cost of gelatin is relatively high, which is limited in practical applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of the gelatin solution: the gelatin was swollen at room temperature for half an hour, and then dissolved in a water bath at a certain temperature to obtain a gelatin solution with a mass content of 10%.

[0038] The preparation of soybean protein isolate solution: soy protein isolate is dissolved in water, and the solution is stirred evenly with a high-speed stirrer, and then a small amount of undissolved small particles and air bubbles are removed by filtering the solution with nylon cloth to obtain a mass content of 10% soybean protein isolate ( pH = 7) solution.

[0039]Above-mentioned two kinds of solutions are mixed, obtain SPI: Gel ratio is respectively 10: 0 (for comparison), 8: 2, 6: 4, 4: 6, 2: 8, the film-forming liquid of 0: 10 (for comparison), The obtained film-forming solution is defoamed by ultrasonic for several minutes, then defoamed by ethanol, then coated, dried and peeled off. The properties of edible packaging films with different rati...

Embodiment 2

[0043] According to the ratio of SPI:Gel=4:6, mix 10% SPI solution (pH=7) and 10% Gel solution to obtain a film-forming solution, and the addition amount of glycerin in the film-forming solution is 0, 0.1, 0.2, 0.3 , 0.4g glycerol / g protein, the obtained film-forming solution is defoamed by ultrasonic for several minutes, then defoamed with ethanol, then coated, dried and peeled off. The properties of edible packaging films with different glycerol added are shown in Table 2.

[0044] It can be seen from Table 2 that as the amount of glycerin increases, the tensile strength and elastic modulus of the edible packaging film gradually decrease, while the elongation at break and the water content of the edible film gradually increase. At the same time, when SPI:Gel=4:6 (10% protein content), the optimum amount of glycerol added is 0.1g glycerol / g protein.

[0045] When table 2 SPI:Gel=4:6 (10% protein content, the pH=7 of SPI solution), the performance of the edible packaging film...

Embodiment 3

[0054] Mix 10% SPI solution and 10% Gel solution according to the ratio of SPI:Gel=4:6 to obtain a film-forming solution, the addition of glycerol in the film-forming solution is 0.1g glycerol / g protein, wherein acetic acid or Sodium carbonate, sodium hydroxide regulate the pH value of soybean protein isolate solution to be 6 (comparative use), 7,8,8.5,9,10, then mix with gelatin solution, the film-forming liquid pH after mixing is 5.87,6.48,7.02, 7.28, 7.50, 9.33, after defoaming the film-forming solution with ultrasonic for a few minutes, defoaming with ethanol, then coating, drying and peeling off the film. The properties of the edible packaging films with different pH of the SPI solution are shown in Table 3.

[0055] It can be seen from Table 3 that as the pH of the isolated soybean protein solution increases, the tensile strength, elongation at break, and elastic modulus of the edible packaging film first increase and then decrease, and reach the maximum at pH 8.5. When...

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Abstract

The invention relates to food pachaging material, in particular edible packing film prepared from soybean protein isolate and glutin and its preparing method and use. The packing film is composed mainly of soybean protein isolate and glutin. Film solution for preparing the film is obtained by mixing two solutions of soybean protein isolate and glutin. The film solution contains soybean protein isolate, glutin, and further adding auxiliary haulages for improving film property, such as glycerin, crosslinking agnet (genipin,transglutaminase or alum), alkaline matter(sodium carbonate, sodium hydroxide).The film appearance is similar to plastic film, can be solved in 30-100deg.C water, and has certain nutritive value. The invention makes the best of advantage of glutin and soybean protein isolate, and obtains edible packing film with definite mechanical stength and low cost.

Description

technical field [0001] The invention belongs to food packaging materials, in particular to an edible packaging film prepared from soybean protein isolate and gelatin, a preparation method and application thereof. Background technique [0002] The preservation of food depends on the packaging of the food and its barrier to the outside world. Plastic packaging film is widely used, but it is easy to produce harmful gas and peculiar smell; and plastic packaging film is not easy to decompose, causing "white pollution" and causing environmental pollution. Edible packaging film can block water, gas, and oil; it can be used as a carrier of food ingredients or additives (pigments, spices, etc.), and it can also provide mechanical protection; and the edible film is easily biodegradable and can be used together with the packaged food Edible, without any environmental pollution. [0003] The invention adopts gelatin (Gel) and soybean protein isolate (SPI) to prepare the edible packagi...

Claims

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Application Information

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IPC IPC(8): C08L89/00C08J5/18A23L1/00A23L5/00
Inventor 符玉华曹娜
Owner BAOTOU DONGBAO BIO TECH CO LTD
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