Polypropylene resin hollow molded foam article and a process...

Details Polypropylene resin hollow molded foam article and a process... Polypropylene resin hollow molded foam article and a process...

2006-03-21

2006-03-21

Kuhns, Allan R. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

C264S050000, C264S051000

Reexamination Certificate

active

07014801

ABSTRACT:
The present invention relates to a hollow molded foam article in which a plurality of polypropylene resins are used as the base resin, and to a process for the production of this hollow molded foam article. More particularly, the present invention relates to a polypropylene resin hollow molded foam article having a foam layer, in which the base resin comprises (a) a polypropylene resin with a melt tension of at least 98 mN and a melt flow rate of 0.5 to 15 g/10 minutes, (b) a polypropylene resin with a melt tension of less than 30 mN (excluding O) and a melt flow rate of 2 to 30 g/10 minutes, and (c) a polypropylene resin with a melt tension of at least 30 mN and less than 98 mN and a melt flow rate of 2 to 15 g/10 minutes, formed by positioning in a mold a softened cylindrical foam having a foam layer obtained by extruding from the die of an extruder a foamable molten resin composition containing a foaming agent, wherein the melt tension at 230° C. of the polypropylene resin that forms the foam layer is at least 10 mN and less than 49 mN, and the apparent density of the foam layer is no more than 0.3 g/cm3.

REFERENCES:
patent: 4522955 (1985-06-01), Fukushima et al.
patent: 6432525 (2002-08-01), Gokuraku et al.
patent: 1 072 389 (2001-01-01), None
patent: 1 075 933 (2001-02-01), None
patent: 60011330 (1985-01-01), None
patent: 2001-47537 (2001-02-01), None
patent: 2002-356573 (2002-12-01), None

Affiliated with

Also associated with

Rating

Polypropylene resin hollow molded foam article and a process... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polypropylene resin hollow molded foam article and a process..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polypropylene resin hollow molded foam article and a process... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3534366