Foamable chlorinated vinyl chloride-based resin particles, foamed particles thereof, chlorinated vinyl chloride-based resin foam molded article, and method for producing foamable chlorinated vinyl chloride resin particles
AssigneeKaneka Corporation
InventorsYuki Neiwa, Ryuta Kutsumizu, Shotaro Maruhashi, Katsuyuki Tanaka, Hisaki Shimokobe
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Abstract
Expandable chlorinated vinyl chloride-based resin particles from which a chlorinated vinyl chloride-based resin foamed molded product achieving both high expansion ratio and excellent surface appearance are provided. The expandable chlorinated vinyl chloride-based resin particles have a porosity of not more than 5.5 (ml/100 g).
Claims15
Expandable chlorinated vinyl chloride-based resin particles having a porosity of not more than 5.5 ml/100 g.
A method for producing expandable chlorinated vinyl chloride-based resin particles, the method comprising the step of:
- extruding a blowing agent-containing chlorinated vinyl chloride-based resin melt, which has been obtained by melting and kneading with an extruder, through a die having a plurality of holes into pressurized water,
- immediately after the extruding, cutting the extruded blowing agent-containing chlorinated vinyl chloride-based resin melt into particles with a rotary cutter while cooling the extruded blowing agent-containing chlorinated vinyl chloride-based resin melt to solidify, wherein a resin temperature of the blowing agent-containing chlorinated vinyl chloride-based resin melt at a tip of the extruder is 130° C. to 250° C.
A method for producing expandable chlorinated vinyl chloride-based resin particles, the method comprising the step of:
- extruding a blowing agent-containing chlorinated vinyl chloride-based resin melt, which has been obtained by melting and kneading with an extruder, through a die having a plurality of holes into pressurized water,
- immediately after the extruding, cutting the extruded blowing agent-containing chlorinated vinyl chloride-based resin melt into particles with a rotary cutter while cooling the extruded blowing agent-containing chlorinated vinyl chloride-based resin melt to solidify, wherein a pressure at a tip of the extruder is 4 MPa to 20 MPa.
Dependencies are inferred from the claim text.