Pre-expanded polypropylene resin particle, and method for...

Details Pre-expanded polypropylene resin particle, and method for... Pre-expanded polypropylene resin particle, and method for...

2008-09-29

2011-11-22

Boykin, Terressa (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

C264S050000, C264S051000, C264S176100, C264S219000, C521S056000, C521S058000, C521S059000, C521S060000

Reexamination Certificate

active

08063177

ABSTRACT:
A pre-expanded polypropylene resin particle can be produced in the following manner: a polypropylene resin particle produced by an under water cut method, water, a dispersing agent, and a foaming agent are charged in a pressure-resistant container, the resulting mixture is heated to a temperature equal to or higher than the softening temperature of the polypropylene resin particle to allow the polypropylene resin particle to be impregnated with the foaming agent under pressure, and the resulting product is released into the atmosphere having a pressure lower than the pressure of the inside of the pressure-resistant container. As the polypropylene resin composition, a composition is used which comprises 100 parts by weight of a polypropylene resin and 1 to 20 parts by weight of a polyethylene resin having a melt viscosity of 10 to 2000 mPa·s at 140° C., whereby it becomes possible to reduce the pressure of a heated molding vapor required for producing an in-mold expanded molding product having a fusion rate of 75% or higher.

REFERENCES:
patent: 6130266 (2000-10-01), Mihayashi et al.
patent: 6214896 (2001-04-01), Mogami et al.
patent: 4-253741 (1992-09-01), None
patent: 5-179050 (1993-07-01), None
patent: 10-77359 (1998-03-01), None
patent: 10-119037 (1998-05-01), None
patent: 2000-95891 (2000-04-01), None
patent: 2000-143866 (2000-05-01), None
patent: 2003-147116 (2003-05-01), None
International Search Report of PCT/JP2008/067656, mailing date of Nov. 18, 2008.

Affiliated with

Also associated with

Rating

Pre-expanded polypropylene resin particle, and method for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pre-expanded polypropylene resin particle, and method for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pre-expanded polypropylene resin particle, and method for... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4285475