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A kind of PVDC composition for self-adhesive preservation

A technology of composition and deionized water, applied in the field of PVDC resin, can solve problems such as lack of reproducibility and lack of uniformity of composition

Active Publication Date: 2021-04-27
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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  • A kind of PVDC composition for self-adhesive preservation
  • A kind of PVDC composition for self-adhesive preservation
  • A kind of PVDC composition for self-adhesive preservation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A self-adhesive fresh-keeping PVDC composition, its raw material formula is as follows:

[0029]

[0030] The preparation steps are as follows:

[0031] (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 ;

[0032] (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;

[0033] (3) Terminate polymerization after reacting for 36 hours, discharge, heat up, remove residual monomer in vacuum, then add epoxidized soybean oil (ESO) 700g, then centrifuge and dry;

[0034] (4) Add 1.75 kg of tributyl citrate (TBC) intermittently to the dried material, mix and keep the t...

Embodiment 2

[0036] A self-adhesive fresh-keeping PVDC composition, its raw material formula is as follows:

[0037]

[0038] The preparation method is the same as in Example 1, and the result: a white powdery composition is obtained.

Embodiment 3

[0040] A self-adhesive fresh-keeping PVDC composition, its raw material formula is as follows:

[0041]

[0042]

[0043] 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 self-adhesive fresh-keeping PVDC composition, which consists of 26.25-29.75 parts of vinylidene chloride monomer, 5.25-8.75 parts of vinyl chloride monomer, 0.001-0.007 part of chelating agent, and 0.01 part of buffering agent in parts by weight. ~0.05 parts, dispersant 0.01-0.06 parts, initiator 0.07-0.3 parts, plasticizer Ⅰ 0.3-1.1 parts, plasticizer Ⅱ 1-2 parts. The composition has excellent processability, and the film produced by a screw extruder has high transparency and barrier property, and is suitable for food fresh-keeping packaging.

Description

technical field [0001] The invention relates to PVDC resin, more specifically, the invention relates to a PVDC composition for self-adhesive preservation. 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 resistance and non-toxicity. [0003] PVDC not only ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/08C08L91/00C08L1/28C08K5/11C08F214/08C08F214/06
CPCC08F214/08C08J5/18C08J2327/08C08J2491/00C08K2201/014C08L27/08C08L2201/08C08L2201/10C08L2203/16C08L2205/02C08L2205/035C08L91/00C08L1/28C08L1/284C08K5/11C08F214/06
Inventor 林久明韩金铭吴志刚余云飞何坚华苏兰辉吕颖琦翁晟宇黄晓军余卫兵席圆圆吴宇鹏胡金红
Owner ZHEJIANG QUZHOU JUSU CHEM IND CO LTD
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