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Potato starch-based degradable antibacterial packaging film and preparation method thereof

A technology of potato starch and packaging film, which is applied in the direction of sustainable packaging, packaging, wrapping paper, etc., can solve the problems that it takes a long time to get effective, food safety and environmental safety have not received enough attention, and achieve the reduction of food Potential safety and environmental safety hazards, broad application prospects and market prospects, and the effect of improving taste and corporate brand image

Inactive Publication Date: 2015-03-25
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these various modification technology methods, some chemical synthesis reagents are often added to achieve a specific modification purpose, and some of the hazards of these chemical additives to the human body and the environment need to be evaluated for a long time, such as It will take a long time to get an effective conclusion whether adding nano-sized particles to edible films is harmful to the human body. The United States and the European Union have strict regulations on the use of nano-sized materials in materials that are in direct contact with food and pharmaceuticals. Food safety and the environment Security doesn't get enough attention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Potato starch-based degradable antibacterial packaging film formula, the mass fraction of each component is as follows: potato starch 70.5%, food glycerin 17.0%, chitosan 7.5%, natural vitamin C 5.0%, the total weight is 12.0g; add 100ml of distilled water in turn , stir evenly to obtain a suspension; put the suspension into a water bath for gelatinization, the temperature is 78.0°C, mechanically stir 360rpm, and the time is 20min to obtain a gelatinized liquid; put the gelatinized liquid into a vacuum box with a vacuum degree of 0.01Pa Internal degassing for 35 minutes, and then cast on flat glass to form a film; then place it horizontally in a blast drying oven to dry at a temperature of 55.0°C for 160 minutes, take it out and peel off the film, the film thickness is 110 μm. Its tensile strength is 8.90MPa, its texture is uniform, its heat sealing performance and antibacterial performance are good.

Embodiment 2

[0031] Potato starch-based degradable antibacterial packaging film formula, the mass fraction of each component is as follows: potato starch 61.7%, gelatin 15.5%, pullan polysaccharide 18.0%, curcumin 4.8%, the total weight is 12.0g; add 100ml of distilled water in turn, stir evenly , to obtain a suspension; put the suspension into a water bath for gelatinization, temperature 80.0°C, mechanical stirring 330rpm, time 18min, to obtain a gelatinized liquid; put the gelatinized liquid into a vacuum box with a vacuum degree of 0.01Pa for degassing 30 minutes, then cast on flat glass to form a film; then place it horizontally in a blast drying oven to dry at a temperature of 60.0°C for 150 minutes, take it out and peel off the film, the film thickness is 96 μm. Its tensile strength is 7.40MPa, its texture is uniform, its heat-sealing performance and antibacterial performance are good.

Embodiment 3

[0033] Potato starch-based degradable antibacterial packaging film formula, the mass fraction of each component is as follows: potato starch 66.5%, sodium alginate 19.5%, propolis 5.5%, lecithin 8.5%, the total mass is 12.0g; add 100ml of distilled water in turn, stir homogeneously, to obtain a suspension; put the suspension into a water bath for gelatinization, the temperature is 85.0°C, mechanically stir at 450rpm, and the time is 20min to obtain a gelatinized liquid; put the gelatinized liquid into a vacuum box with a vacuum degree of 0.01Pa to remove Air for 25 minutes, and then cast on flat glass to form a film; then place it horizontally in a blast drying oven to dry at a temperature of 52.0°C for 180 minutes, take it out and peel off the film, and the film thickness is 105 μm. Its tensile strength is 8.30MPa, its texture is uniform, its heat sealing performance and antibacterial performance are good.

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Abstract

The invention belongs to the field of a green and environment-friendly packaging material, and in particular relates to a degradable antibacterial packaging film prepared from potato starch and a preparation method of the degradable antibacterial packaging film. The degradable antibacterial packaging film mainly consists of potato starch, a food thickening agent, food preservatives and a food antioxidant. The preparation method comprises the following steps: firstly weighing the potato starch, the food thickening agent, the food preservatives and the food antioxidant according to certain proportions, sequentially dissolving the materials in a proper amount of distilled water, and uniformly stirring to obtain a suspension; then gelatinizing the suspension in a water bath kettle; and then degassing the gelatinized suspension in a vacuum box and carrying out curtain casting on a piece of sheet glass; finally, drying and forming a film in an air-blast drying oven. The packaging film disclosed by the invention is prepared from natural food materials, so that the packaging film is environment-friendly, degradable and antibacterial, can be widely applied to the inside packaging of food, and can be used for avoiding pollution of a non-degradable packaging material to the environment.

Description

(1) Technical field [0001] The invention relates to a potato starch-based degradable antibacterial packaging film and a preparation method thereof, belonging to the field of green and environment-friendly degradable packaging materials. (2) Background technology [0002] The rapid development of social economy makes people pay more and more attention to food safety and environmental safety. Natural, simple and low-carbon is an active way of life for human beings and is widely accepted by the public. At present, the main material used for packaging is petroleum-based non-degradable plastic film, which is used in a huge amount and causes serious white pollution. In addition, plasticizers and various processing aids are added to these packaging films during the production process. threatening. [0003] The decomposition temperature of natural starch is lower than its melting temperature. Starch alone is not thermoplastic and cannot form a film alone. Plasticizers need to be a...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L5/08C08L89/00C08L5/04C08L5/00C08J5/18B65D65/46
CPCY02W90/10
Inventor 张新林罗世永许文才张文雨黄校军
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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