Vinylidene chloride copolymer, and its membrane or sheet material

A vinylidene chloride-like copolymer technology, which is applied in the field of vinylidene chloride-like copolymers and compositions thereof, can solve problems such as reducing the incidence of poor packaging, and achieve excellent retort adaptability and excellent stretching process adaptability. , Excellent effect of 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

However, there is a demand for reducing the incidence of defects associated with

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] In a glass-lined reactor (inner volume 300L) equipped with three-leaf backward-curved blades (extension diameter: 400mm), finger-shaped baffles, thermometers, and nitrogen inlet pipes, the polymerization initiator was added under a nitrogen atmosphere. Oxidize 0.15 parts by mass (0.17kg) of diisopropyl dicarbonate and 82 parts by mass (90.2kg) of vinylidene chloride (VDC). The mixture was stirred for 3 hours to generate polyvinylidene chloride. Next, 50 g of the mixed solution was taken out immediately before the injection of vinyl chloride, and the amount of polyvinylidene chloride produced and the weight average molecular weight of polyvinylidene chloride were measured.

[0102] Then drop into 18 parts by mass (19.8kg) of vinyl chloride (VC), 0.03 parts by mass (0.03kg) of 3,3-dilauryl thiodipropionate (DLTDP), and carry out the mixed solution with a stirring speed of 1.4m / sec. Stir for 20 minutes. Next, add 100 parts by mass (110 kg) of deionized water and 2.5 part...

Embodiment 2～4

[0108] According to the mass fraction of the vinylidene chloride that feeds feed, the mass fraction of the vinylidene chloride that feeds intake, the generation time of polyvinylidene chloride, the end-of-polymerization temperature according to Table 1, carry out embodiment 2~ 4. The results are listed in Table 1.

Embodiment 5

[0110] Initiate polymerization according to the mass fraction of vinylidene chloride recorded in Table 1, the mass fraction of vinyl chloride fed, and the generation time of polyvinylidene chloride, shorten the polymerization time at the final polymerization temperature of 65°C to Example 5 was carried out in the same manner as in Example 1 except for 6 hours. 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 membrane thickness uniformity of the obtained membrane or the sheet material is excellent, and 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, through the differential scanning calorimetry thermal detection (DSC), and the heat release summit time of the vinylidene chloride copolymer detected in an isothermal crystallization detection at 70 DEG C is less than 10 minutes.

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-speed filling adaptability and heating and pressure sterilization adaptability A film or sheet thereof excellent in (so-called retort suitability); 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, 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 packagi...

Claims

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Application Information

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IPC IPC(8): C08F214/08C08L27/08B65D65/38
Inventor 中村直人吉田谦次
Owner ASAHI KASEI KK
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