Title:
発泡性スチレン系樹脂粒子の製造方法
Document Type and Number:
Japanese Patent JP6770838
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a production method for foamable styrenic resin particles capable of stably obtaining such particles from an impact-resistant styrenic resin including carbon black by a quenching method and also capable of obtaining from such particles, an in-mold foamed molding of the styrenic resin having a beautiful surface improved in color shading and clearance between particles and also having high impact strength, and to provide a production method for the in-mold foamed molding of the styrenic resin, and such a foamed molding.SOLUTION: A production method for foamable styrenic resin particles comprises: preparing a molten resin by melting and kneading an impact-resistant styrenic resin, carbon black and a foaming agent; pushing out the molten resin in a pressurized water through a die having small holes; and cutting the molten resin pushed out in the water by a rotary cutter. The discharge amount per hour of the molten resin passing through the small holes is 1.0 kg/hole or more but 2.5 kg/hole or less, the pressure of the pressurized water is 0.8 MPa (gage pressure) or more but 1.2 MPa, and the temperature of the pressurized water is 50°C or higher but 70°C or lower.SELECTED DRAWING: None
Inventors:
Toru Yoshida
Shotaro Maruhashi
Yoshihito Yano
Shotaro Maruhashi
Yoshihito Yano
Application Number:
JP2016133059A
Publication Date:
October 21, 2020
Filing Date:
July 05, 2016
Export Citation:
Assignee:
Kaneka Corporation
International Classes:
B29B9/06; B29C44/00; C08J3/20; C08J9/16; C08K3/04; C08L25/04; C08L51/04
Domestic Patent References:
| JP2014080514A | ||||
| JP2015183182A | ||||
| JP2015172155A |
Attorney, Agent or Firm:
Yoshiharu Yoshida