Expandable polystyrene resin beads and manufacture method thereof and expanded moldings

Expandable polystyrene resin beads and manufacture method thereof and expanded moldings

  • CN 101,925,646 B
  • Filed: 01/23/2009
  • Issued: 12/16/2015
  • Est. Priority Date: 01/30/2008
  • Status: Active Grant
First Claim
Patent Images

1. an expandable polystyrene resin beads, it is obtained by extrusion by melting,In described extrusion by melting, whipping agent to be pressed in the polystyrene resin of in forcing machine melting and to carry out mixing, from the aperture of the mouth mould being attached to forcing machine front end, the molten resin containing whipping agent is directly expressed into cooling liquid, extrudate is cut off with high-speed rotary rotor while extruding, and by making extrudate cooling curing with liquid comes into contact, obtain expandable polystyrene resin beadsThe weight-average molecular weight Mw of the polystyrene resin after melt extruding is the scope of 120,000 ~ 270,000,Whipping agent after melt extruding contains pentane as essential component using the ratio being 3 ~ 5.5 mass parts relative to 100 mass parts polystyrene resins, and, by quality ratio, above-mentioned pentane consist of iso-pentane:

  • Skellysolve A=10;

    the scope of 90 ~ 80;

    20.

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