Method for manufacturing fried food packaging film

Abstract

The invention provides a method for manufacturing a fried food packaging film. The method comprises steps as follows: (1), a chitosan solution with a concentration of 2% is prepared; (2), raw potato starch and crosslinked and esterified starch are mixed in the proportion of 3:1 to prepare a starch solution with a concentration of 20%, and the starch solution is gelatinized at the temperature of 75 DEG C for half an hour; (3), the starch solution is quickly cooled to the temperature of 45 DEG C after completely gelatinized, 50u of isoamulase is added into each gram of starch, and stirring is performed at a constant temperature for 3 hours; (4), the chitosan solution and the starch solution are mixed in the proportion of 1:10 and is stirred for 30 minutes at a rotation speed of 550r / min; (5), the stirred mixed solution is heated to the temperature of 60 DEG C, polyethylene glycol accounting for 3% of the weight of the mixed solution is added, and stirring is continuously performed for 20 minutes; (6), grout obtained after stirring is subjected to tape casting, and then the package film is obtained. The packaging film produced with the method has the advantages of high degradability and safety and low oil permeability and is suitable for being used for packing fried food.

Description

technical field [0001] The invention relates to a manufacturing method of a packaging film, in particular to a fried food packaging film. Background technique [0002] At present, polyethylene film is mostly used for packaging fried food. The film of this material has the advantages of high temperature resistance and high strength. However, in order to increase the strength of the film during processing, plasticizers, such as DEHA, DEHP, etc., these substances are considered to cause human precocious puberty, infertility and so on. In addition, the performance of polyethylene is relatively stable, and it is difficult to be degraded in the environment. The extensive use of this film increases the degree of environmental pollution. The technical scheme of using polychitosan / gellan gum to make packaging film has been recorded in the existing literature. This packaging film has the advantages of being degradable and edible, but it is not suitable for packaging fried foods, beca...

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Problems solved by technology

In addition, the performance of polyethylene is relatively stable, and it is difficult to be degraded in the environment. The extensive use of this film increases the degree of environmental pollution.

The technical scheme of using polychitosan / gellan gum to make packaging film has been recorded in the existing literature. This packaging film has the advantages of being degradable and edible, but it is not suitable for packaging fried foods, because the oil will This type of film will undergo performance changes such as a decrease in strength, and at the same time will expose the grease and cause packaging pollution

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