Polypropylene resin foamed particles and method for producing same

A technology of polypropylene-based resin and foamed particles, which is applied in the field of polypropylene-based resin foamed particles and its manufacturing, to achieve excellent hue effects
CN110506071AActive Publication Date: 2019-11-26KANEKA CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KANEKA CORP
Publication Date
2019-11-26

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Abstract

Provided are polypropylene resin foamed particles with which an in-mold foam molded article that has a uniform gray color with excellent tone can be obtained. Polypropylene resin particles which are formed by adding carbon black and at least one selected from magnesium hydroxide and magnesium carbonate to a polypropylene resin are dispersed, together with carbon dioxide, in an aqueous dispersion medium in an airtight container and heated to the softening temperature of the polypropylene resin particles or higher and pressurized. The result is discharged in a pressure region lower than the internal pressure of the airtight container to produce uniform polypropylene resin foamed particles that have an excellent color tone.
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Description

technical field

[0001] The present invention relates to polypropylene-based resin expanded particles and a method for producing the same. Background technique

[0002] An in-mold foamed molded product obtained by filling a mold with polypropylene-based resin foamed particles and heat-molding has the advantages of an in-mold foamed molded product, ie, flexibility in shape, light weight, and thermal insulation properties. In addition, compared with the in-mold foamed molded article using the same synthetic resin foamed particles, the chemical resistance, chemical resistance, and chemical resistance of the in-mold foamed molded article obtained by using the polystyrene resin foamed particles were compared. Excellent thermal properties and strain recovery rate after compression. Moreover, compared with the in-mold foaming molding using polyethylene-type resin expanded particle, it is excellent in dimensional accuracy, heat resistance, and compressive strength.

[0003] Based o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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