Process for Production of Foamed Resin Sheet
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United States of America Patent
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Issued Date -
May 7, 2009
app pub date -
Jan 30, 2007
filing date -
Apr 18, 2006
priority date (Note) -
Abandoned
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Abstract
The invention provides a process for production of foamed resin sheet which enables satisfactory dispersion of a nucleating agent in a thermoplastic resin and which attains excellent extrusion formability and is excellent in productivity. There is provided a process for production of foamed resin sheet by extruding a thermoplastic resin prepared by incorporating a nucleating agent and a foaming agent consisting of a gas containing at least one of nitrogen and carbon dioxide into a thermoplastic resin, characterized in that the process further comprises incorporating into the thermoplastic resin high molecular weight ester and a wetting agent having a kinematic viscosity coefficient (a kinematic viscosity coefficient at 100° C.; centistokes) of 70 to 2700.
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