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US 10,947,359 B2Granted
Bead expanded molded article, resin expanded particles, method for producing resin expanded particles, expandable resin particles and method for producing bead expanded molded article
AssigneeSekisui Plastics Co., Ltd.
InventorsHiromaru Yamamoto, Hironori Kobayashi, Haruhiko Matsuura
Life of this patent
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Abstract
Provided is a bead expanded molded article comprising a plurality of resin expanded particles that are fusion-bonded with each other, in which the resin expanded particles mainly include a resin having a glass transition temperature of 180° C. or more.
Claims2
A method for producing resin expanded particles, comprising:
- melt-kneading a resin composition including a resin and an organic-based physical blowing agent that is any one of methyl phenyl ether, ethylene glycol, and propylene glycol with an extruder, and extrusion-expanding the melt-kneaded resin composition;
- and
- forming the extrusion-expanded resin composition into particulate resin expanded particles,
- wherein said resin is a main component of said resin composition and said resin has a glass transition temperature of 180° C. or more, and said resin expanded particles have a bulk density of 0.04 g/cm3 or more and 0.9 g/cm3 or less.
1 more element
Dependencies are inferred from the claim text.