Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – To form particulate product
Reexamination Certificate
2004-09-08
2010-10-19
Tucker, Philip C (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
To form particulate product
C264S211130, C264S211200, C425S067000
Reexamination Certificate
active
07815828
ABSTRACT:
A method for manufacturing thermoplastic resin expandable granules comprising the steps of: injecting a blowing agent under pressure into a thermoplastic resin which is melted in an extruder; extruding the melted resin containing the blowing agent as an extrudate from a plurality of small holes in a die attached to a distal end of the extruder directly into a coolant liquid, and directly cutting the extrudate by high-speed rotary blades; and cooling and solidifying the extrudate by contacting with the coolant liquid, and thereby obtaining the expandable granules wherein the melted resin containing the blowing agent passing through land parts of the small holes of the die is extruded such that a shearing speed is 12,000 to 35,000 sec−1, and an apparent melt viscosity of the resin is 100 to 700 poise.
REFERENCES:
patent: 3857665 (1974-12-01), Kennedy
patent: 3867082 (1975-02-01), Lambertus
patent: 4385016 (1983-05-01), Gwinn
patent: 5911928 (1999-06-01), Shimazu et al.
patent: 6315931 (2001-11-01), Bruning et al.
patent: 6884377 (2005-04-01), Burnham et al.
patent: 7294299 (2007-11-01), Yamanaka et al.
patent: 2005/0156344 (2005-07-01), Dietzen et al.
patent: 305862 (1989-03-01), None
patent: 48-20423 (1973-06-01), None
patent: 49-69775 (1974-07-01), None
patent: 61-195808 (1986-08-01), None
patent: 06-031726 (1994-02-01), None
patent: 06-134753 (1994-05-01), None
patent: 06-136176 (1994-05-01), None
patent: 07-178726 (1995-07-01), None
patent: 07-314438 (1996-12-01), None
patent: 9-208735 (1997-08-01), None
patent: 11-058374 (1999-03-01), None
patent: 11-277528 (1999-10-01), None
patent: 2001-253965 (2001-09-01), None
patent: 2002-337138 (2002-11-01), None
patent: 2003-220606 (2003-08-01), None
patent: WO-03/053651 (2003-07-01), None
patent: WO 03106544 (2003-12-01), None
Japanese Office Action dated May 22, 2008 for corresponding Japanese Application No. 2005-514021.
Supplementary European Search Report issued Sep. 9, 2009 for corresponding European Application No. 04 78 7745.
Doi Tsuneo
Kobayashi Hideki
Kobayashi Toshiro
Hindenlang Alison
Rader & Fishman & Grauer, PLLC
Sekisui Plastics Co., Ltd.
Tucker Philip C
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