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Edible composite film and preparation method thereof

A technology of composite film and food habit, applied in the field of composite film, can solve the problems of poor toughness and low mechanical strength, and achieve good oxygen barrier effect

Active Publication Date: 2010-03-17
天津大宇包装制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, more and more attention has been paid to the research and development of degradable films and edible films. However, whether it is a single film of chitosan or a single film of starch, there are deficiencies in its performance, such as low mechanical strength and poor toughness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The preparation method of above-mentioned edible composite film, comprises the following steps:

[0032] (1) Weigh water-soluble chitosan, add distilled water to form a chitosan solution with a mass percentage concentration of 1.5% to 3%, and stir for 15 to 45 minutes in a constant temperature water bath at 70 to 80°C to make the chitosan completely dissolve, spare;

[0033] (2) Weigh the modified starch, add distilled water to make a modified starch paste aqueous solution with a mass percentage concentration of 2% to 4%, and swell and stir it in a constant temperature water bath at 85 to 95°C for 15 to 45 minutes to prepare a modified starch Paste solution, keep warm for later use;

[0034] (3) Blend the above-mentioned chitosan solution and the modified starch paste solution in a ratio of (50-80) by volume: (20-50), and stir in a constant temperature water bath at 70°C for 40-60 minutes to obtain a blended solution ;

[0035] (4) Add plasticizer at 0.6% to 1% of th...

Embodiment 1

[0039] (1) Take by weighing 16 grams of water-soluble chitosan, add 784 grams of distilled water to form a chitosan solution with a concentration of 2%, and stir for 30 minutes at 70-80°C in a constant temperature water bath to dissolve the chitosan completely, spare;

[0040] (2) Take by weighing 18 grams of cross-linked hydroxypropyl starch, add 582 grams of distilled water to make a starch solution with a concentration of 3%, and swell and stir for 30 minutes at 85-95°C in a constant temperature water bath to prepare a starch paste solution, Insulation standby;

[0041] (3) Blending the above-mentioned 400 milliliters of chitosan solution with 100 milliliters of modified starch paste solution, and stirring in a constant temperature water bath at 70° C. for 50 minutes to obtain a blended solution;

[0042] (4) Add 4 milliliters of glycerin, 2.5 grams of stearic acid and 2.5 grams of palmitic acid, stir and dissolve in a water bath at 85°C for 30 minutes, and set aside;

[...

Embodiment 2

[0045] (1) Take by weighing 16 grams of water-soluble chitosan, add 1050 grams of distilled water to form a chitosan solution with a concentration of 1.5%, and stir for 15 minutes at 70-80°C in a constant temperature water bath to dissolve the chitosan completely, spare;

[0046] (2) Weigh 18 grams of esterified starch, add 432 grams of distilled water to form a starch solution with a concentration of 4%, and swell and stir it for 45 minutes in a constant temperature water bath at 85-95°C to prepare a starch paste solution, which is kept warm for subsequent use;

[0047] (3) Blending the above-mentioned 400 milliliters of chitosan solution with 400 milliliters of modified starch paste solution, and stirring in a constant temperature water bath at 70° C. for 60 minutes to obtain a blended solution;

[0048] (4) Add 4.8 milliliters of sorbitol and 16 grams of stearic acid, stir and dissolve in a water bath at 85°C for 40 minutes, and set aside;

[0049] (5) Filter the blend sol...

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Abstract

The invention discloses an edible composite film and a preparation method thereof, comprising the following components by volume portion: 50-80 portions of chitosan aqueous solution with the concentration in mass percent of 1.5 percent-3 percent, 20-50 portions of modified starch paste aqueous solution with the concentration in mass percent of 2 percent-4 percent, plasticizer accounting for 6-1 percent of the volume summation of the chitosan aqueous solution and the modified starch paste aqueous solution, and aliphatics auxiliaries accounting for 0.05-2 percent of the mass summation of the chitosan aqueous solution and the modified starch paste aqueous solution. In the invention, the edible composite film is prepared by taking the chitosan and the modified starch paste as the main film-forming materials and adopting a method of physical blending through naturally drying in a casting way. The film has good properties of oxygen resistance, oil resistance and rapidlysis in hot water, canreach a certain mechanical strength, and can be used as the internal surface of a food plastic packing bag or the internal package of instant fast food, thereby being a convenient, sanitary and environmental packing material.

Description

technical field [0001] The invention relates to a composite film, especially an edible composite film and a preparation method thereof. Background technique [0002] Chitosan is a new type of natural polymer material, which is rich in sources, simple to prepare, convenient to use, safe and non-toxic, and has good antibacterial and film-forming properties. Starch has the characteristics of wide sources, low cost, renewable and biodegradable, which is in line with the strategy of environmental protection and sustainable development. In recent years, more and more attention has been paid to the research and development of degradable films and edible films. However, whether it is a single film of chitosan or a single film of starch, there are deficiencies in its performance, such as low mechanical strength and poor toughness. . Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a good oxygen resistance, oil resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08L3/06C08L3/10C08L3/04C08K5/053C08K5/09C08J5/18
Inventor 韩永生刘秉镰刘彦平赵丽美
Owner 天津大宇包装制品有限公司
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