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Antioxidant packaging film of food and preparation method of packaging film

A packaging film and anti-oxidation technology, which is applied in the field of food anti-oxidation packaging film and its preparation, can solve the problem of not having food preservation, anti-oxidation, antibacterial and other fresh-keeping properties, and achieves extended food shelf life, good processing performance, casting The effect of improved performance

Inactive Publication Date: 2015-09-09
湖北联玉新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] EVOH is the alcoholysis product of ethylene-vinyl acetate copolymer undergoing saponification reaction or partial saponification reaction. It is a highly crystalline solid with excellent gas barrier properties and excellent processability, as well as excellent mechanical properties. It is usually used as The intermediate barrier layer of plastic composite film is widely used in the field of food packaging. It has good barrier properties, excellent mechanical properties and excellent processing properties. Although it has a good prospect as a packaging material, the material itself is not It does not have the anti-oxidation, antibacterial and other fresh-keeping properties that food preservation should have; therefore, it is extremely necessary to further improve its anti-oxidation and fresh-keeping functions

Method used

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  • Antioxidant packaging film of food and preparation method of packaging film
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preparation example Construction

[0019] The preparation method of this EVOH food antioxidant packaging film is as follows:

[0020] (1) Antioxidant solution preparation: take 75% ethanol solution as a solvent, weigh a certain amount of α-tocopherol and dissolve it in the ethanol solution, and prepare an antioxidant solution containing α-tocopherol.

[0021] (2) Membrane solution configuration: First, weigh a certain amount of n-propanol and dissolve it in distilled water, and configure it into an aqueous solution of n-propanol according to the volume ratio of n-propanol and distilled water as 1 to 2; then, weigh a certain amount of n-propanol according to the mass ratio. High-quality EVOH resin, PVA resin and glycerin are added to the prepared n-propanol aqueous solution to form a mixed solution, and the mixed solution is placed in a constant temperature water bath to make it under the condition of 50 ° C ~ 75 ° C Heat and stir until completely dissolved; then, weigh a certain amount of the antioxidant soluti...

Embodiment 1

[0025] (1) Antioxidant solution preparation: take 75% ethanol solution as solvent, weigh 20g of α-tocopherol and dissolve in 20ml of ethanol solution, and prepare an antioxidant solution with α-tocopherol concentration of 1g / ml.

[0026] (2) Membrane liquid configuration: first, configure n-propanol aqueous solution, the volume ratio of n-propanol and distilled water is 1; then, weigh 17.5g EVOH resin, 3.75g PVA resin and 1.25g glycerol, add it to 350ml n-propanol Propanol aqueous solution, then put the mixed solution into a constant temperature water bath, heat and stir at 50°C to 75°C until completely dissolved; then, add the α-tocopherol prepared in step (1) to the mixed solution Solution 2.5ml, continue to stir until a homogeneous film-forming solution is obtained.

[0027] (3) Film formation: put the film-making solution prepared in step (2) into a vacuum drying oven to remove the air bubbles in the solution, and then use a syringe to draw a certain volume of film liquid ...

Embodiment 2

[0029] (1) Antioxidant solution preparation: take 75% ethanol solution as solvent, weigh 20g of α-tocopherol and dissolve in 20ml of ethanol solution, and prepare an antioxidant solution with α-tocopherol concentration of 1g / ml.

[0030] (2) Membrane solution configuration: First, configure n-propanol aqueous solution, the volume ratio of n-propanol to distilled water is 2; then, weigh 20g EVOH resin, 2.75g PVA resin and 0.25g glycerol, add it to 300ml n-propanol Alcohol aqueous solution, then put the mixed solution into a constant temperature water bath, heat and stir at 50°C to 75°C until completely dissolved; then, add the α-tocopherol solution prepared in step (1) to the mixed solution 2ml, continue to stir until a homogeneous film-forming solution is obtained.

[0031] (3) Film formation: put the film-making solution prepared in step (2) into a vacuum drying oven to remove the air bubbles in the solution, and then use a syringe to draw a certain volume of film liquid and ...

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Abstract

The invention relates to an antioxidant EVOH (ethylene vinyl alcohol copolymer) packaging film of food. The packaging film comprises components in percentage by mass as follows: 70%-90% of EVOH resin, 5%-15% of PVA (polyvinyl alcohol) resin, 1%-10% of alpha-tocopherol and 1%-5% of glycerin, wherein the ethylene content of the EVOH resin is 29 mol% and the EVOH resin is SoarnoL<TM>D2908 produced by Japanese Synthetic Chemistry; the PVA resin is the 1799 model produced by Sinopec.

Description

technical field [0001] The invention relates to a food anti-oxidation packaging material, in particular to a food anti-oxidation packaging film with ethylene / vinyl alcohol copolymer (EVOH) as the main film-forming substrate and a preparation method thereof. Background technique [0002] Lipid oxidation in food is one of the main reasons for food spoilage. Lipid oxidation reduces the nutritional value of food, thus shortening the shelf life of food. At present, the lipid oxidation of food is mainly controlled by adding antioxidants and packaging, directly adding antioxidants to food during food processing, or configuring composite antioxidants to treat food by spraying, coating, etc., combined with vacuum , Modified atmosphere packaging and other technologies to control the oxidative deterioration of lipids in food. In recent years, the preparation and development of active packaging materials has attracted more and more attention. Antioxidants are added or coated on plastic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L29/04C08K5/053C08K5/13
CPCC08L23/08C08L2201/08C08L2203/16C08L29/04C08K5/053C08K5/13
Inventor 陈晨伟谢晶贺璇璇李少玮房婧婕杨福馨顾香敏
Owner 湖北联玉新材料科技有限公司
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