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Preparation method of food preservative film

A technology of food preservation and slurry, which is applied in the field of food packaging, can solve the problems of great harm to the human body, and achieve the effects of high compactness, extended shelf life, and high tensile strength

Inactive Publication Date: 2019-11-22
杜倩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among these three kinds of plastic wraps, chemicals are the main ones, especially PVC plastic wraps contain carcinogens, which are harmful to the human body. Therefore, it is necessary to have an environmentally friendly and harmless plastic wrap product.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] After the sugar beets are wet-cleaned and prepared, they are chopped, and then pretreated by oxygen delignification, and then subjected to subtraction and gentle cooking for 6-7 hours. The alkali concentration is controlled at 10%. Perform high-temperature sterilization at 95°C for 2 to 4 hours to obtain polyemulsion fibers.

Embodiment 2

[0021] a) Add soybean protein isolate, sodium alginate and sodium carboxymethylcellulose into appropriate amount of deionized water and stir to dissolve, then add glycerin and flavanols (preferably monoester flavans) in a water bath at 80°C Alcohol dimer), and add deionized water, stir continuously, adjust the pH to 8 with sodium hydroxide during this period, obtain the surface layer slurry, store it for later use;

[0022] b) Mix mercerized cotton fibers and E-glass chopped fibers (2-3mm in length) according to a mass ratio of 1:1, then perform high-temperature sterilization at 90°C for 2 hours, make a middle layer of pulp, and store for later use;

[0023] c) The poly-emulsion fiber obtained in embodiment 1 is subjected to flexible and free beating until the degree of beating is 35 ° SR to obtain the bottom layer slurry, which is stored for subsequent use;

[0024] d) Add alkali-recovered white mud calcium carbonate filler (10wt%) to the surface layer slurry, spray glutinous...

Embodiment 3

[0027] a) Add soybean protein isolate, sodium alginate and sodium carboxymethyl cellulose into an appropriate amount of deionized water and stir to dissolve, then add glycerin and flavanols (preferably monoester flavans) in a water bath at 90°C Alcohol dimer), and add deionized water, continue to stir evenly, adjust the pH to 9 with sodium hydroxide during this period, obtain the surface layer slurry, store it for later use;

[0028] b) Mix mercerized cotton fibers and E-glass chopped fibers (2-3mm in length) according to a mass ratio of 1:1, then perform high-temperature sterilization at 95°C for 4 hours, make a middle layer of pulp, and store for later use;

[0029] c) The poly-emulsion fiber obtained in embodiment 1 is subjected to flexible and free beating until the degree of beating is 35 ° SR to obtain the bottom layer slurry, which is stored for subsequent use;

[0030] d) Add alkali-recovered white mud calcium carbonate filler (10wt%) to the surface layer slurry, spray...

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Abstract

The invention discloses a preparation method of a food preservative film, which comprises the following steps: preparing surface layer slurry by using soy isolate protein, sodium alginate and sodium carboxymethyl cellulose as raw materials; preparing middle-layer slurry by means of mercerized cotton fibers and alkali-free glass chopped fibers as raw materials; preparing bottom-layer pulp by usingthe poly-milk fibers as a raw material; adding a proper amount of additive into the three types of slurry, and squeezing, drying and softly pressing the slurry to obtain the food preservative film. According to the method, the raw materials are environmentally friendly, suitable for packaging food, easy to degrade and free of environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of food packaging, and in particular relates to a preparation method of a food preservation film. Background technique [0002] Plastic wrap is a kind of plastic packaging product, which is usually made by polymerization with ethylene as the masterbatch. Microwave food heating, refrigerator food preservation, fresh and cooked food packaging and other occasions are widely used in family life, supermarkets, hotels and restaurants, and food packaging in industrial production. [0003] Most of the plastic wraps sold in the market are made of vinyl masterbatch. According to the different types of vinyl masterbatch, the plastic wrap can be divided into three categories. [0004] 1. Polyethylene, referred to as PE, this material is mainly used for food packaging. The film we usually buy for fruits and vegetables, including semi-finished products purchased in supermarkets, is made of this material; 2. Polychlorinat...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L89/00C08L5/04C08L1/28C08L1/02C08L67/04C08K7/14C08K3/26
CPCC08J5/18C08J2389/00C08J2401/02C08J2401/28C08J2405/04C08J2467/04C08K7/14C08K2003/265C08K2201/004
Inventor 杜倩
Owner 杜倩
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