Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Reexamination Certificate
2004-08-12
2008-09-09
Eashoo, Mark (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
C521S059000, C521S140000, C428S318800
Reexamination Certificate
active
07423071
ABSTRACT:
A polypropylene-based resin composition for injection foam molding, containing (A) 50 to 95 parts by weight of a linear polypropylene-based resin having a melt flow rate of from 10 g/10 min. to 100 g/10 min. and a melt tension of 2 cN or less and (B) 5 to 50 parts by weight of a modified polypropylene having a melt flow rate of from 0.1 g/10 min. to less than 10 g/10 min. and a melt tension of 5 cN or more and exhibiting a strain hardening property (provided that a total of the resin (A) and the resin (B) is 100 parts by weight) and a foaming agent are supplied to an injection molding machine to be injected into a die, thereby achieving a foam molding. It is thus possible to obtain a injection foamed molded article which has a satisfactory injection foam moldability, a skin layer having little silver streaks or the like on its surface, and an internal core layer having a foam of high expansion ratio and uniformly fine and a excellent appearance glossiness, lightweightness, and rigidity at a low cost.
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International Search Report dated Nov. 30, 2004 of PCT/JP2004/011872.
English translation of International Preliminary Report on Patentability of PCT/JP2004/011872 mailed on Jun. 29, 2006.
Mogami Kenji
Nakayama Ryoji
Eashoo Mark
Kaneka Corporation
Westerman, Hattori, Daniels & Adrian , LLP.
Winkler Melissa
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