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Polyvinylidene chloride composition capable of prolonging food shelf life

A polyvinylidene chloride, food preservation technology, applied in the field of polyvinylidene chloride resin, can solve the problems of lack of reproducibility, lack of uniformity of the composition, etc., achieve good transparency, improve processing thermal stability, and product performance excellent effect

Inactive Publication Date: 2017-08-11
ZHEJIANG QUZHOU JUSU CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is the general lack of uniformity and, to some extent, reproducibility of its properties in the compositions it forms

Method used

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  • Polyvinylidene chloride composition capable of prolonging food shelf life
  • Polyvinylidene chloride composition capable of prolonging food shelf life
  • Polyvinylidene chloride composition capable of prolonging food shelf life

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of polyvinylidene chloride composition that prolongs food preservation period, its raw material formula is as follows:

[0028]

[0029] The preparation steps are as follows:

[0030] (1) Put 55kg of deionized water, 4g of disodium edetate, 22g of methylcellulose, 22g of Hydroxypropyl methylcellulose, 25g sodium pyrophosphate, 105g diisopropyl peroxydicarbonate, 28kg vinylidene chloride, and 7kg vinyl chloride were cold dispersed for 30 minutes, then heated up to 37°C at a stirring speed of 22.5rpm to start polymerization ;

[0031] (2) Gradually increase the temperature to 55.5°C at a temperature rate of 1.5°C / h, and simultaneously increase the stirring speed to 30rpm at a stirring speed of 1.3rpm / h;

[0032] (3) Terminate polymerization after reacting for 36 hours, discharge, heat up, remove residual monomers in a vacuum, then add 1.75 kg of tributyl citrate (TBC), then centrifuge and dry;

[0033] (4) Add 7 g of dialkyl thiodipropionate intermittently to...

Embodiment 2

[0035] A kind of polyvinylidene chloride composition that prolongs food preservation period, its raw material formula is as follows:

[0036]

[0037] The preparation method is the same as in Example 1, and the result: a white powdery composition is obtained.

Embodiment 3

[0039] A kind of polyvinylidene chloride composition that prolongs food preservation period, its raw material formula is as follows:

[0040]

[0041]

[0042] The preparation method is the same as in Example 1, and the result: a white powdery composition is obtained.

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Abstract

The invention discloses a polyvinylidene chloride composition capable of prolonging food shelf life. The polyvinylidene chloride composition comprises, by weight, 26.25-29.75 parts of polyvinylidene chloride monomer, 5.25-8.75 parts of vinyl chloride monomer, 0.001-0.007 part of chelating agent, 0.01-0.05 part of buffer agent, 0.01-0.06 part of dispersing agent, 0.07-0.3 part of initiator, 1-2 parts of liquid plasticizer and 0.004-0.014 part of solid plasticizer. The polyvinylidene chloride composition has the advantages that the composition is excellent in processability, and a thin film prepared through a screw extruder is high in transparency and barrier property, applicable to food fresh-keeping packaging and capable of prolonging the food shelf life.

Description

technical field [0001] The invention relates to a polyvinylidene chloride resin, and more specifically, the invention relates to a polyvinylidene chloride composition for prolonging food preservation period. Background technique [0002] Food preservative films have moderate barrier properties (oxygen barrier, moisture barrier), adjust the oxygen and moisture content around the preserved products (cooked food, fruits and vegetables, etc.), and prolong the freshness period of food. Food preservation film is divided into polyethylene (PE), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC) and other types according to the material. PE cling film is a kind of plastic packaging product commonly used by people to keep fresh food, and the use temperature does not exceed 110 ℃. PVC plastic wrap contains carcinogens, which are harmful to the human body. PVDC can be used in both refrigerators and microwave ovens, and is far superior to ordinary plastic wraps in terms of heat ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/08C08K5/11C08F214/08C08F214/06
CPCC08F214/08C08J5/18C08J2327/08C08K5/11C08F214/06C08L27/08
Inventor 余云飞韩金铭苏兰辉何坚华吴志刚林久明吕颖琦翁晟宇黄晓军席圆圆
Owner ZHEJIANG QUZHOU JUSU CHEM IND CO LTD
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