Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Reexamination Certificate
2011-03-22
2011-03-22
Hug, Eric (Department: 1741)
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
C162S901000
Reexamination Certificate
active
07909965
ABSTRACT:
Disclosed is a shoe press belt (10) which comprises a reinforcing fibrous base material (6) embedded in a polyurethane layer, and has an outer circumference layer (2a) and an inner circumference layer (2b) each formed with a polyurethane. The polyurethane layer constituting the outer circumference layer (2a) comprises a polyurethane which is cured by the reaction of an urethane prepolymer (A) with a curing agent mixture (B). The urethane prepolymer (A) is produced by reacting an isocyanate compound selected from p-phenylene-diisocyanate and 4,4′-methylenebis(phenylisocyanate) with a polytetramethylene glycol and has an isocyanate group at its terminal. The curing agent mixture (B) comprises 1,4-butanediol and an aromatic polyamine having an active hydrogen group (H). The shoe press belt has excellent wear resistance, cracking resistance and bending fatigue resistance.
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Ishino Atsushi
Suzuki Nobuharu
Yamazaki Shintaro
Yazaki Takao
Hug Eric
Ichikawa Co. Ltd.
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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