Degradable film and preparation method thereof

A technology for degrading film and inulin, applied in the direction of flexible covering, packaging, wrapping paper, etc., can solve the problems of poor strength and high cost of food packaging film, and achieve good water retention, low cost and good compatibility.

Inactive Publication Date: 2016-01-27
QINGDAO BAIZHONG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a degradable film and a preparation method thereof, which solves the problems of poor strength and high cost of the food packaging film in the prior art which affect its use

Method used

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  • Degradable film and preparation method thereof

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Effect test

Embodiment 1

[0011] A preparation method of a degradable film, comprising the steps of: dissolving 80 parts by weight of inulin and 10 parts by weight of tea polyphenols in 200 parts by weight of water, stirring evenly, and adding 10 parts by weight of gellan gum, 5 parts by weight of xylitol and 5 parts by weight of sodium alginate were dispersed in an ultrasonic disperser for 40 minutes to obtain a glue liquid; gelatinize the above glue liquid at 40°C, continue to stir, and then pour it into a mold, Dry at 60°C for 10 hours, cool, and peel off the film to obtain the primary product; age the above primary product for 20 hours in an environment with a relative humidity of 60%, and then perform extrusion and tableting, and finally, injection molding to obtain a film.

Embodiment 2

[0013] A preparation method of a degradable film, comprising the steps of: dissolving 100 parts by weight of inulin and 25 parts by weight of tea polyphenols in 300 parts by weight of water, stirring evenly, and adding 15 parts by weight of gellan gum, 8 parts by weight of xylitol and 7 parts by weight of sodium alginate were dispersed in an ultrasonic disperser for 50 minutes to obtain a glue liquid; gelatinize the above glue liquid at 40°C, continue to stir, then pour it into a mold, and Dry at 60°C for 10 hours, cool, and peel off the film to obtain the primary product; age the above primary product for 28 hours in an environment with a relative humidity of 60%, and perform extrusion and tableting, and finally, injection molding to obtain a film.

Embodiment 3

[0015] A preparation method of a degradable film, comprising the steps of: dissolving 120 parts by weight of inulin and 40 parts by weight of tea polyphenols in 400 parts by weight of water, stirring evenly, and adding 20 parts by weight of gellan gum, 10 parts by weight of xylitol and 10 parts by weight of sodium alginate were dispersed in an ultrasonic disperser for 60 minutes to obtain a glue liquid; gelatinize the above glue liquid at 40°C, continue to stir, then pour it into a mold, and Dry at 60°C for 10 hours, cool, and peel off the film to obtain the primary product; age the above primary product in an environment with a relative humidity of 60% for 36 hours, and perform extrusion and tableting, and finally, injection molding to obtain a film.

[0016] The three kinds of films obtained from Example 1 to Example 3 and a commercially available food-grade film are selected for natural degradation by soil microorganisms. The pH of the selected soil is 7.83, the mass content...

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Abstract

The invention discloses a degradable film and a preparation method thereof and belongs to the technical field of food packaging. The degradable film comprises raw materials in parts by weight as follows: 80-120 parts of inulin, 10-40 parts of tea polyphenols, 10-20 parts of gellan gum, 5-10 parts of xylitol, 5-10 parts of sodium alginate and 200-400 parts of water. The invention further provides the preparation method of the degradable film. The degradable film is obtained by dissolving, fully dispersing, gelatinizing, pouring, drying, ageing, extruding and injection-molding the raw materials. According to the degradable film, the inulin and the tea polyphenols are fully mixed, under the action of the gellan gum, the xylitol and the sodium alginate, the synergistic effect of the raw materials is greatly improved, and the obtained film is natural and edible, has the high degradation velocity, the good tensile strength, the high elongation at break and the good water retention performance, is convenient to use and is low in cost.

Description

technical field [0001] The invention belongs to the technical field of food packaging, in particular to a degradable film and a preparation method thereof. Background technique [0002] Food packaging film is a film container used to hold and protect food. Currently, food packaging film is ubiquitous in life, and modern production and life cannot do without them. Edible film refers to a film made of edible materials, which mainly ensures the quality of food and prolongs the shelf life of food by preventing the migration of gas, water vapor and solute. There are many kinds of edible packaging seen in daily life, and each edible film has its shortcomings. For example, the glutinous rice paper in the polysaccharide film is edible, but its strength is poor, and it is easy to get wet when exposed to water. It is damaged and the production scale is small, so it is difficult to meet the needs of food packaging; another example is the edible casing processed from the animal small i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/00C08K5/098C08K5/1545C08K5/053C08J5/18B65D65/46
Inventor 张明
Owner QINGDAO BAIZHONG CHEM TECH
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