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Production technology of food-grade polyvinylidene chloride resin

A polyvinylidene chloride and production process technology, which is applied in the production process field of food-grade polyvinylidene chloride resin, can solve the problems of low production efficiency, long monomer consumption time, and waste of time, so as to improve synthesis efficiency and save time Effect

Active Publication Date: 2015-10-21
南通汇羽丰新材料有限公司
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AI Technical Summary

Problems solved by technology

The disadvantages of this recovery process are: first, the second process takes a long time to recover the monomer in the resin slurry, which prolongs the waiting time for cleaning the polymerization tank; second, after the third process completes the recovery of the residual monomer in the polymerization tank, In the whole process of the fourth stage, the polymerization tank is waiting for cleaning, and the time is 80 to 180 minutes
This wastes a lot of time and the production efficiency is not high

Method used

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Examples

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Embodiment Construction

[0020] The present invention will be described in further detail below through examples, and the following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0021] The production technology of food grade polyvinylidene chloride resin of the present invention comprises the following steps:

[0022] A. Polymerization feeding. After the pure water used for suspension polymerization is put into the polymerization tank according to the predetermined amount, the polymerization tank is vacuumed. After the vacuum degree of the polymerization tank meets the requirements, the vinylidene chloride monomer, comonomer and initiator , Dispersant The corresponding additives are put into the polymerization tank according to the predetermined input amount, and then the predetermined stirring speed and stirring time are used to disperse the polymerization monomer. After the dispersion of the monomer is completed, the temperat...

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Abstract

The invention discloses a production technology of food-grade polyvinylidene chloride resin. A polymerization tank can be cleaned in the monomer recycling process by adjusting monomer recycling steps and adding a foam eliminating tank and a washing liquid temporary storage tank, and the cleaning is ended without waiting monomers are completely recycled, so that the time of 100-200 minutes is saved, and the synthetic efficiency of the polyvinylidene chloride resin is improved by 3.5% to 7%.

Description

technical field [0001] The invention relates to a resin production process, in particular to a food-grade polyvinylidene chloride resin production process. Background technique [0002] Polyvinylidene chloride (PVDC) resin is a polymer of vinylidene chloride (VDC) and vinyl chloride (VC), acrylonitrile, acrylic acid, methacrylate and other monomers with high barrier properties, strong toughness, It is an ideal packaging material with good low-temperature heat-sealing performance, good thermal shrinkage and chemical stability. In addition to the general properties of plastics, it also has excellent oil resistance, chemical corrosion resistance, taste retention, and excellent oxygen barrier, moisture resistance and mildew resistance, and can be directly in contact with food. It also has excellent printing properties. Compared with other plastic packaging materials, it has the characteristics of low cost and high performance, and is the first choice for food packaging materia...

Claims

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Application Information

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IPC IPC(8): C08F214/08C08F2/18C08F2/38C08F6/24C08J11/02
Inventor 张金虎曾宏刚王亚宾祝义方
Owner 南通汇羽丰新材料有限公司
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