Shoe press belt for paper making

Details Shoe press belt for paper making Shoe press belt for paper making

2011-05-17

2011-05-17

Tran, Thao T. (Department: 1787)

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

C162S358100

Reexamination Certificate

active

07943013

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,21) and an inner circumference layer (2b,22) each formed with a polyurethane. The polyurethane layer comprises a polyurethane which is produced by curing a composition comprising a mixture of an urethane prepolymer (A) and a curing agent (B). The urethane prepolymer (A) is produced by reacting an isocyanate compound (a) containing 55 to 100 mol % of a p-phenylene-diisocyanate compound with polytetramethylene glycol (b) and has an isocyanate group at its terminal. The curing agent (B) is selected from the group consisting of 1,4-butanediol, hydroquinone bis-βhydroxylethyl ether, 3,5-diethyltoluenediamine and 3,5-dimethylthiotoluenediamine. The belt (10) has excellent cracking resistance, bending fatigue resistance and wear resistance.

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Search Report issued on Jan. 11, 2011, in corresponding European patent Application No. 08777456.8 (6 pages).

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