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Degradable wheat starch-based antibacterial packaging film and preparation method thereof

A technology of wheat 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: 2015-02-25
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] Wheat starch-based degradable antibacterial packaging film formula, the mass fraction of each component is as follows: wheat starch 66.6%, food glycerin 19.6.0%, chitosan 8.5%, natural vitamin C 5.3%, the total weight is 15.0g; add 100ml of distilled water in sequence , stir evenly to obtain a suspension; put the suspension into a water bath for gelatinization, the temperature is 75.0°C, mechanically stir 350rpm, and the time is 20min to obtain a gelatinized liquid; put the gelatinized liquid into a vacuum with a vacuum degree of 0.01Pa Degas in the oven for 35 minutes, then cast the film on flat glass; then place it horizontally in a blast drying oven to dry at a temperature of 55.0°C for 150 minutes, take it out and peel off the film, the film thickness is 136 μm. Its tensile strength is 16.30MPa, its texture is uniform, its heat sealing performance and antibacterial performance are good.

Embodiment 2

[0031] Wheat starch-based degradable antibacterial packaging film formula, the mass fraction of each component is as follows: wheat starch 65.4%, gelatin 12.3%, pullan polysaccharide 15.5%, curcumin 6.8%, the total weight is 15.0g; add 100ml of distilled water in turn, stir evenly, Prepare the suspension; put the suspension into a water bath for gelatinization, the temperature is 80.0°C, mechanically stir at 330rpm, and the time is 15min to obtain a gelatinized liquid; put the gelatinized liquid into a vacuum box with a vacuum degree of 0.01Pa for degassing for 40min , 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 60.0°C for 140 minutes, take it out and peel off the film, and the film thickness is 156 μm. Its tensile strength is 18.40MPa, its texture is uniform, its heat sealing performance and antibacterial performance are good.

Embodiment 3

[0033] Wheat starch-based degradable antibacterial packaging film formula, the mass fraction of each component is as follows: wheat starch 64.3%, sodium alginate 21.5%, propolis 6.7%, lecithin 7.5%, the total mass is 15.0g; add 100ml of distilled water in turn, stir well , to obtain a suspension; put the suspension into a water bath for gelatinization, the temperature is 83.0°C, mechanically stir at 400rpm, and the time is 25min 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 58.0°C for 160 minutes, take it out and peel off the film, the film thickness is 145 μm. Its tensile strength is 12.90MPa, 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 environment-friendly and degradable packaging materials, and particularly relates to a degradable wheat starch-based antibacterial packaging film and a preparation method thereof. The degradable wheat starch-based antibacterial packaging film mainly comprises wheat starch, food thickener, food antiseptics and food antioxidant. The preparation method includes firstly weighing the wheat starch, the food thickener, the food antiseptics and the food antioxidant according to a certain proportion, dissolving them into moderate distilled water sequentially, and uniformly stirring to obtain suspension; secondly, placing the suspension into a water bath to gelatinize; thirdly, degassing the gelatinized suspension in a vacuum chamber, and subjecting the degassed suspension to curtain coating on a glass panel to obtain a film; finally drying the film in a blast drying tank. The packaging film is made of natural food materials, features environment friendliness, degradability and antibiosis, and is widely applicable to internal food packaging, and environmental pollution of non-degradable packaging materials can be avoided.

Description

(1) Technical field [0001] The invention relates to a wheat 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 ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08J5/18B65D65/46
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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