Title:
PROCESS FOR PRODUCING POLISHING PAD
Document Type and Number:
WIPO Patent Application WO/2007/123168
Kind Code:
A1
Abstract:
A process for producing continuous polishing pads which is reduced in the number
of production steps and has excellent productivity. Also provided is a process
for producing continuous layered polishing pads which is reduced in the number
of production steps, has excellent productivity, and prevents the pads from
suffering polishing layer/cushioning layer separation. The process for producing
continuous polishing pads comprises: a step in which a urethane composition
having bubbles dispersed therein is prepared by mechanical foaming; a step in
which a face material is delivered and the urethane composition having dispersed
bubbles is continuously ejected onto the material; a step in which another face
material is superposed on the urethane composition having dispersed bubbles;
a step in which the urethane composition having dispersed bubbles is cured while
regulating the thickness so as to be even to thereby form a polishing layer made
of a polyurethane foam; a step in which the polishing layer is cut into two slices
in a direction parallel with the plane to thereby simultaneously produce two
continuous polishing layers each comprising of a polishing layer and a face material;
and a step in which the resultant continuous polishing layers are cut.
Inventors:
FUKUDA TAKESHI (JP)
WATANABE TSUGUO (JP)
HIROSE JUNJI (JP)
NAKAMURA KENJI (JP)
DOURA MASATO (JP)
WATANABE TSUGUO (JP)
HIROSE JUNJI (JP)
NAKAMURA KENJI (JP)
DOURA MASATO (JP)
Application Number:
PCT/JP2007/058494
Publication Date:
November 01, 2007
Filing Date:
April 19, 2007
Export Citation:
Assignee:
TOYO TIRE & RUBBER CO (JP)
FUKUDA TAKESHI (JP)
WATANABE TSUGUO (JP)
HIROSE JUNJI (JP)
NAKAMURA KENJI (JP)
DOURA MASATO (JP)
FUKUDA TAKESHI (JP)
WATANABE TSUGUO (JP)
HIROSE JUNJI (JP)
NAKAMURA KENJI (JP)
DOURA MASATO (JP)
International Classes:
B29C39/18; B24B37/20; B29C39/16; H01L21/304; B29K75/00; B29K105/04; B29L9/00
Domestic Patent References:
| WO1985005314A1 | 1985-12-05 | |||
| WO2004094108A1 | 2004-11-04 | |||
| WO2006062158A1 | 2006-06-15 |
Foreign References:
| JP2005177945A | 2005-07-07 | |||
| JPH11138564A | 1999-05-25 | |||
| JPH06262633A | 1994-09-20 | |||
| JP2007061929A | 2007-03-15 |
Attorney, Agent or Firm:
OZAKI, Yuzo et al. (13-9 Nishinakajima 5-chome, Yodogawa-ku, Osaka-sh, Osaka 11, JP)
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