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Preparation method for chitosan fruit moistureproof freshness protection package

A fresh-keeping bag, chitosan technology, applied in special paper, textile and papermaking, fiber raw material processing and other directions, can solve the problems of poor water solubility, hinder the application of chitosan fresh-keeping packaging, different properties and properties, etc., to overcome the poor water solubility. Effect

Inactive Publication Date: 2013-02-13
张建新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Poor water solubility, most of them use acid as solvent, which limits its application effect, affects the flavor of fruits and vegetables, and is difficult to dry
Different varieties of fruits and vegetables have different properties and properties, and the same formula cannot achieve the best fresh-keeping effect for all kinds of fruits and vegetables, so it cannot be mass-produced
The above-mentioned shortcomings have hindered the application of chitosan fresh-keeping packaging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Put 25g of paraffin wax and 10g of glyceryl stearate into a flask to heat and melt, pour it into a three-necked reaction flask, start stirring, raise the temperature to 90-95 degrees, add 5g of EM emulsifier, 3g of oleic acid, and dropwise add KOH aqueous solution . At this time, the emulsion starts to thicken from thin. When the KOH is added, increase the stirring speed, keep the temperature at 80-90 degrees, start dripping hot water, and the consistency of the emulsion will become thinner immediately. Stir for 30 minutes, cool down, and obtain a paraffin wax waterproof emulsion;

[0028] 2) Apply paraffin wax waterproof emulsion to the surface of wood pulp paper, and pre-baked and baked (130-150 degrees) to obtain fruit bagging paper with a waterproof layer;

[0029] 3) Spray the inner surface of the fruit bagging paper with a waterproof layer on the chitosan solution with a concentration of 50mg / ml, and dry it;

[0030] 4) Cut the paper into a suitable size to m...

Embodiment 2

[0033] 1) Completely dissolve 10g of zinc acetate in water, add 40g of methyl hydrogen-containing polysilicic acid emulsion and 15g of cationic hydroxyl polysiloxane microemulsion, and dilute with water to an effective content of 2% to obtain a silicone emulsion;

[0034] 2) Soak the wood pulp paper in the silicone emulsion for 20 minutes, drain the water, and dry at 70-90 degrees;

[0035] 3) Spray the inner surface of the fruit bagging paper with a waterproof layer on the chitosan solution with a concentration of 1mg / ml, and dry it;

[0036] 4) Cut the paper into a suitable size to make a paper bag;

[0037] 5) Put the fruit into the paper bag and twist the mouth of the bag tightly.

Embodiment 3

[0039] According to the fruit bagging paper with waterproof layer that the method of embodiment 1 makes, spray the chitosan solution that concentration is 100mg / ml on its inner surface, dry and get final product. And the bagging paper of the chitosan layer, glue one side of the waterproof layer and the PE mesh together, cut the paper into a suitable size, and make a paper bag. Put the fruit in a paper bag and twist the mouth of the bag tightly.

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Abstract

The invention discloses a preparation method for a chitosan fruit moistureproof freshness protection package, which comprises the following steps; firstly, performing pulping, beating, refining, preparing and size mixing on wood pulp and / or straw pulp and manufacturing with pulp to obtain paper through a paper machine; secondly, preparing waterproof emulsion; thirdly, coating the waterproof emulsion on the surface of wood pulp paper and obtaining fruit bagging paper with a waterproof layer through baking processing; fourthly, spraying a chitosan liquid on the inner surface of the fruit bagging paper with the waterproof layer and drying to obtain the paper; and fifthly, cutting the paper into an appropriate size and manufacturing to obtain a paper package. According to the invention, the manufactured product has the advantages of collision resistance, moisture protection, bacterium resistance and freshness retaining, overcomes the defects that the chitosan has poor water-solubility, is difficult in production operation, influences the flavor of fruits and vegetables and is difficult to dry, and is suitable for application to various fruits.

Description

technical field [0001] The invention specifically relates to a preparation method of a chitosan fruit moisture-proof fresh-keeping bag. Background technique [0002] Chitosan (chitosan) is obtained by deacetylation of chitin (chitin), which exists widely in nature, and its chemical name is polyglucosamine (1-4)-2-amino-B-D glucose. Since 1859, the French After Rouget first obtained chitosan, the excellent properties of this natural polymer such as biofunctionality and compatibility, blood compatibility, safety, and microbial degradation have attracted widespread attention from all walks of life. Significant progress has been made in applied research in cosmetics, water treatment, metal extraction and recovery, biochemical and biomedical engineering, and many other fields. [0003] As a fresh-keeping agent for fruits and vegetables, chitosan has the following advantages: 1) It has good gas selective permeability, which can limit the contact between the product and the outsid...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H19/00D21J3/10
Inventor 张建新
Owner 张建新
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