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Vinylidene chloride copolymer composition, its preparing method and its membrane or sheet material

A technology of vinylidene chloride, manufacturing method, applied in the direction of flexible coverings, packaging, wrapping paper, etc., can solve problems such as uneven sealing strength and reduced productivity, and achieve excellent uniformity of film thickness and excellent extrusion stability , high-frequency sealing adaptability and excellent cooking adaptability

Active Publication Date: 2013-07-31
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When high-frequency sealing is performed on a film with uneven film thickness to obtain a film package, productivity tends to decrease due to uneven sealing strength

Method used

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  • Vinylidene chloride copolymer composition, its preparing method and its membrane or sheet material
  • Vinylidene chloride copolymer composition, its preparing method and its membrane or sheet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] In the reactor (inner volume 300L) equipped with three-leaf backward curved blades (extension diameter 400mm), finger-shaped baffle, thermometer and nitrogen inlet pipe, add deionized water and suspending agent hydroxypropyl methylcellulose, 100 parts by mass of a suspension having a dissolved hydroxypropylmethylcellulose concentration of 500 ppm was prepared.

[0095] Then add 80 mass parts vinylidene chloride, 20 mass parts vinyl chloride, 0.15 mass parts initiator diisopropyl peroxydicarbonate, 3 mass parts dibutyl sebacate (hereinafter referred to as DBS), after stirring speed is 1.4m / sec, heating to 45°C under a nitrogen atmosphere to start polymerization. After continuing the reaction for 10 hours, the temperature was raised to 55° C. over 1 hour, the stirring speed was set to 1.2 times the initial speed (1.68 m / sec), and polymerization was continued for 15 hours. After the reaction, unreacted monomers were separated, and the weight-average particle diameter of t...

Embodiment 2～6

[0101] Examples 2 to 6 were carried out in the same manner as in Example 1 based on the suspending agent, initial stirring speed, plasticizer addition amount, and addition method described in Table 1. The results are shown in Table 1.

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Abstract

The invention relates to a vinylidene chloride copolymer composition, its preparing method and its membrane or sheet material. The vinylidene chloride copolymer composition of the present invention is the copolymer composition formed by vinylidene chloride and a polymerism vinyl monomer, and is characterized in that the scope of the volume-average diameters of the particle of the copolymer composition is in 200mum-500mum, and the half-peak overall width of the particle size distribution by volume-average expression is below 150mum.

Description

technical field [0001] The present invention relates to a vinylidene chloride copolymer composition, a production method thereof, a film or sheet thereof, and a food packaging container using the film or sheet, the extrusion of the vinylidene chloride copolymer composition during melt molding Excellent stability. Background technique [0002] For films, sheets, and containers made of vinylidene chloride copolymer compositions, it is excellent in oxygen barrier properties, moisture resistance, transparency, chemical resistance, oil resistance, adhesion, and heat shrinkage. It is suitable for food packaging materials, plastic wrap, etc. There are suspension polymerization method and emulsion polymerization method in the production method of the vinylidene chloride-based copolymer composition used for food packaging film, but the suspension polymerization method is generally used because there is no problem such as the residue of an emulsifier. The suspension polymerization m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/08C08F214/08C08F2/44C08F2/18B65D65/38
Inventor 武井徹西田裕国
Owner ASAHI KASEI KK
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