Title:
EXPANDED POLYSTYRENE RESIN PARTICLE AND METHOD OF MANUFACTURE FOR SAME, POLYSTYRENE RESIN PRE-EXPANSION PARTICLE, POLYSTYRENE RESIN EXPANDED FORM, THERMOPLASTIC RESIN PRE-EXPANSION PARTICLE AND METHOD OF MANUFACTURE FOR SAME, AND THERMOPLASTIC EXPANDED FORM
Document Type and Number:
WIPO Patent Application WO/2011/118706
Kind Code:
A1
Abstract:
Disclosed is an expanded polystyrene resin particle containing bubbles, wherein the value of N calculated by the formula N=n÷(1/ρ) is 400 or higher when the number of bubbles is n/mm2 and volume density is ρg/cm3 at 200μm from a particle surface on a cross-section passing through the centre of the particle. Further disclosed is a thermoplastic resin pre-expansion particle obtained by melt kneading a thermoplastic resin and an expanding agent inside a resin supply device to form an expansion agent-containing thermoplastic resin. The resin is passed through small apertures in a die and extruded inside a cooling medium, immediately cut and expanded inside the cooling medium to form a thermoplastic pre-expansion particle increased in volume by a factor of 1.6 which is then removed from the cooling medium. Further disclosed is an expanded polystyrene resin particle with a degree of whiteness of 75 or less, obtained by heat kneading a polystyrene resin and an expanding agent inside a resin supply device, passing and extruding the molten expansion-agent containing polystyrene resin through small apertures in a die, then cooling and cutting.
Inventors:
ENDO Shota (1336-2, Shimohemi, Koga-sh, Ibaraki 35, 〒3060235, JP)
遠藤 翔太 (〒35 茨城県古河市下辺見１３３６番地２ 積水化成品工業株式会社内 Ibaraki, 〒3060235, JP)
TARUMOTO Hiroyuki (1336-2, Shimohemi, Koga-sh, Ibaraki 35, 〒3060235, JP)
樽本 裕之 (〒35 茨城県古河市下辺見１３３６番地２ 積水化成品工業株式会社内 Ibaraki, 〒3060235, JP)
CHINOMI Ryosuke (1336-2, Shimohemi, Koga-sh, Ibaraki 35, 〒3060235, JP)
地海 良輔 (〒35 茨城県古河市下辺見１３３６番地２ 積水化成品工業株式会社内 Ibaraki, 〒3060235, JP)
遠藤 翔太 (〒35 茨城県古河市下辺見１３３６番地２ 積水化成品工業株式会社内 Ibaraki, 〒3060235, JP)
TARUMOTO Hiroyuki (1336-2, Shimohemi, Koga-sh, Ibaraki 35, 〒3060235, JP)
樽本 裕之 (〒35 茨城県古河市下辺見１３３６番地２ 積水化成品工業株式会社内 Ibaraki, 〒3060235, JP)
CHINOMI Ryosuke (1336-2, Shimohemi, Koga-sh, Ibaraki 35, 〒3060235, JP)
地海 良輔 (〒35 茨城県古河市下辺見１３３６番地２ 積水化成品工業株式会社内 Ibaraki, 〒3060235, JP)
Application Number:
JP2011/057176
Publication Date:
September 29, 2011
Filing Date:
March 24, 2011
Export Citation:
Assignee:
SEKISUI PLASTICS CO., LTD. (4-4 Nishitenma 2-chome, Kita-ku Osaka-sh, Osaka 65, 〒5308565, JP)
積水化成品工業株式会社 (〒65 大阪府大阪市北区西天満二丁目４番４号 Osaka, 〒5308565, JP)
ENDO Shota (1336-2, Shimohemi, Koga-sh, Ibaraki 35, 〒3060235, JP)
遠藤 翔太 (〒35 茨城県古河市下辺見１３３６番地２ 積水化成品工業株式会社内 Ibaraki, 〒3060235, JP)
TARUMOTO Hiroyuki (1336-2, Shimohemi, Koga-sh, Ibaraki 35, 〒3060235, JP)
樽本 裕之 (〒35 茨城県古河市下辺見１３３６番地２ 積水化成品工業株式会社内 Ibaraki, 〒3060235, JP)
CHINOMI Ryosuke (1336-2, Shimohemi, Koga-sh, Ibaraki 35, 〒3060235, JP)
積水化成品工業株式会社 (〒65 大阪府大阪市北区西天満二丁目４番４号 Osaka, 〒5308565, JP)
ENDO Shota (1336-2, Shimohemi, Koga-sh, Ibaraki 35, 〒3060235, JP)
遠藤 翔太 (〒35 茨城県古河市下辺見１３３６番地２ 積水化成品工業株式会社内 Ibaraki, 〒3060235, JP)
TARUMOTO Hiroyuki (1336-2, Shimohemi, Koga-sh, Ibaraki 35, 〒3060235, JP)
樽本 裕之 (〒35 茨城県古河市下辺見１３３６番地２ 積水化成品工業株式会社内 Ibaraki, 〒3060235, JP)
CHINOMI Ryosuke (1336-2, Shimohemi, Koga-sh, Ibaraki 35, 〒3060235, JP)
International Classes:
C08J9/16; B29B9/06; B29B11/02
Attorney, Agent or Firm:
TANAI Sumio et al. (1-9-2, Marunouchi Chiyoda-ku, Tokyo 20, 〒1006620, JP)
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Claims: