Non-crosslinked polypropylene resin pre-expanded particles and in-mold foamed moldings

A cross-linked polypropylene and pre-foaming technology, which is applied in the field of in-mold foaming moldings, can solve problems such as undetermined effects and unexpectable effects, and achieve the effects of excellent weldability, excellent antistatic properties, and less pollution
CN103214727BActive Publication Date: 2015-10-28KANEKA CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
KANEKA CORP
Publication Date
2015-10-28

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Abstract

Pre-expanded noncrosslinked polypropylene-based resin particles are provided, which comprise a noncrosslinked polypropylene-based resin composition that contains 1 wt% to 30 wt% of an ion-conducting polymer-type anti-static agent that is made of an amphiphilic block copolymer and contains an alkali metal salt of a fluoroalkylsulfonic acid; a method for producing an in-mold expansion-molded article of a noncrosslinked polypropylene-based resin is provided, which comprises the step of filling the foregoing pre-expanded particles into a mold capable of being closed but incapable of being hermetically sealed, and heating the same with water vapor so that the particles are molded; and an in-mold expansion-molded article is provided, which is obtained by the foregoing producing method. Pre-expanded noncrosslinked polypropylene-based resin particles that allow for the production of in-mold expansion molded articles that exhibit an excellent anti-static property and are less contaminating, and an in-mold expansion-molded article obtained from the foregoing pre-expanded particles can be provided.
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Description

[0001] This application is a divisional application for an invention patent application with an application date of October 30, 2007, an application number of 200780047245.8, and an invention title of "non-crosslinked polypropylene resin pre-expanded particles and in-mold foaming moldings". Technical field

[0002] The present invention relates to non-crosslinked polypropylene resin pre-expanded particles having excellent antistatic properties, an in-mold foamed article obtained from the non-crosslinked polypropylene resin pre-expanded particles, and a method for producing the same. Background technique

[0003] Compared with the foamed product obtained from the polystyrene resin pre-expanded particles, the foamed product obtained from the polypropylene resin pre-expanded particles has chemical resistance, heat resistance, cushioning property, and compression set recovery. It has excellent properties, and has excellent heat resistance and compressive strength even when compared wit...

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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