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

A vinylidene chloride, copolymer-like technology, applied in flexible coverings, packaging, wrapping paper, etc., can solve the problems of easy segregation and large difference in polymer density, and achieve excellent cooking adaptability, stretching Excellent processing adaptability and excellent film thickness uniformity

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

In addition, in the vinylidene chloride-based resin composition described in Patent Document 2, it is described that powder fluidity can be improved by adding an ethylene copolymer, but due to the polymer density of the vinylidene chloride-based resin composition The difference is large, so there is a problem that segregation is easy to occur after powder mixing

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] In a glass-lined reactor (inner volume 300L) equipped with three-leaf backward-curved blades (expansion diameter 400mm), finger-shaped baffles, thermometers, and nitrogen inlet pipes, put 12 mass of deionized water in the order described Parts, 0.03 parts by mass of dilauryl 3,3-thiodipropionate (DLTDP), 0.15 parts by mass of polymerization initiator diisopropyl peroxydicarbonate (IPP), 18 parts by mass of vinyl chloride (VC), partial 82 parts by mass of vinyl chloride (VDC), and the mixed solution was stirred for 20 minutes at a stirring speed of 1.4 m / sec. Next, the concentration of the suspending agent hydroxypropyl methylcellulose is 2.5 parts by mass of an aqueous solution of 2 mass%, 88 parts by mass of deionized water, and after stirring for 20 minutes to confirm the formation of particles, the internal temperature of the reactor is raised to Polymerization was initiated at 35°C, and the temperature was continuously raised to 56°C over 30 hours, then maintained a...

Embodiment 2

[0113] Except having changed the addition amount of vinyl chloride (VC) into 17 mass parts, and the addition amount of vinylidene chloride (VDC) into 83 mass parts, it carried out polymerization and evaluated similarly to Example 1. The results are listed in Table 1.

Embodiment 3

[0115] Except having changed the addition amount of vinyl chloride (VC) into 16 mass parts, and the addition amount of vinylidene chloride (VDC) into 84 mass parts, it carried out polymerization and evaluated similarly to Example 1. The results are listed in Table 1.

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Abstract

The invention relates to a vinylidene chloride copolymer composition, the stretch processing adaptability during a melt molding process is excellent, thereby a membrane or a sheet material with excellent membrane thickness uniformity can be obtained, the high frequency seal adaptability and heating pressurization sterilization adaptability (so-called boiling adaptability) of the provided membrane or the sheet material are excellent; the vinylidene chloride copolymer is the vinylidene chloride copolymer formed by vinylidene chloride and a polymerism vinyl monomer, wherein, the copolymer has two crystallization melting peaks during differential scanning calorimetry thermal detection (DSC), and the ratio (a) / (b) of the peak height (a) of the crystallization melting peak with high temperature to the peak height (b) of the crystallization melting peak with low temperature is 0.7-1.3.

Description

technical field [0001] The present invention relates to a vinylidene chloride-based copolymer and a composition thereof which are excellent in stretching process adaptability during melt molding and can obtain a film or sheet excellent in film thickness uniformity; high-frequency sealing adaptability and heat-pressurization sterilization adaptability The film or sheet thereof is excellent in performance (so-called retort adaptability); and a food packaging container using the film or sheet. Background technique [0002] For films, sheets, and containers made of vinylidene chloride-based copolymer compositions, it is excellent in oxygen barrier properties, moisture resistance, transparency, chemical resistance, oil resistance, adhesion, heat shrinkage, etc. It is suitable for food packaging materials, plastic wrap, etc. There are suspension polymerization method and emulsion polymerization method in the production method of vinylidene chloride-based copolymers used in food p...

Claims

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Application Information

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IPC IPC(8): C08F214/08C08L27/08B65D65/46
Inventor 西田裕国吉田谦次
Owner ASAHI KASEI KK
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