Title:
METHOD FOR PRODUCING FOAMED PARTICLE MOLDED ARTICLE PROVIDED WITH SKIN
Document Type and Number:
WIPO Patent Application WO/2018/123833
Kind Code:
A1
Abstract:
Provided is a method for producing a foamed particle molded article provided with a skin, the foamed particle molded article having exceptional surface properties as well as exceptional adhesiveness between a skin material and the foamed particle molded article even when the skin material is thin. A method for producing a foamed particle molded article provided with a skin, the method comprising forming a hollow molded article by blow molding a softened parison formed by extruding polypropylene resin, filling the hollow portion of the hollow molded article with polypropylene resin foamed particles, and supplying a heating medium to the inside of the hollow molded article to heat and fuse the polypropylene resin foamed particles and the hollow molded article as well as to heat and fuse the polypropylene resin foamed particles to each other, wherein the melt elongation of the polypropylene resin that forms the hollow molded article at 190°C is 100 m/min or higher, the half-crystallization time of the polypropylene resin at 100°C is 25-80 seconds, the melting peak temperature of the polypropylene resin in heat flux differential scanning calorimetry is 130-155°C, the partial heat of fusion of the polypropylene resin at 140°C or higher is 20-50 J/g, and the ratio of the partial heat of fusion of the polypropylene resin with respect to the total heat of fusion of the polypropylene resin (partial heat of fusion/total heat of fusion) is 0.2-0.8.
Inventors:
KAWAKAMI HIROKI (JP)
TOKIWA TOMOO (JP)
TOKIWA TOMOO (JP)
Application Number:
PCT/JP2017/046039
Publication Date:
July 05, 2018
Filing Date:
December 21, 2017
Export Citation:
Assignee:
JSP CORP (JP)
International Classes:
B29C67/20; B29C49/04; B29C49/20; B32B5/18; C08J9/232
Foreign References:
| JP2016028883A | 2016-03-03 | |||
| JP2008273117A | 2008-11-13 | |||
| JP2015123603A | 2015-07-06 | |||
| JP2004249558A | 2004-09-09 | |||
| JP2018001493A | 2018-01-11 | |||
| JP2008273117A | 2008-11-13 |
Other References:
See also references of EP 3560690A4
Attorney, Agent or Firm:
HOSOI Isamu et al. (JP)
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