Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – Stratified or layered articles
Patent
1997-03-10
2000-08-22
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
Stratified or layered articles
264122, 264126, 51298, 51293, 451 56, B29C 4320, B29C 4352
Patent
active
061067547
ABSTRACT:
A polishing pad having a substantially uniform, continuously interconnected porous surface. The pad can be produced by pressure sintering powder compacts of thermoplastic polymer at a temperature above the glass transition temperature but not exceeding the melting point of the polymer. The sintering process is conducted in a mold at a pressure in excess of 100 psi (0.07 MPa). In a preferred version, a mixture of two polymer powders is used, where one polymer has a lower melting point than the other.
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Cook Lee Melbourne
James David B.
Jenkins Charles William
Pillai Raj Raghav
Reinhardt Heinz F.
Benson Kenneth A.
Jones Kenneth M.
Kaeding Konrad
Rodel Holdings Inc.
Silbaugh Jan H.
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