POLYURETHANE ROLL COVER FOR CALENDER ROLL FOR PAPERMAKING MACHINE
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United States of America Patent
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Issued Date -
May 18, 2017
app pub date -
Nov 1, 2016
filing date -
Nov 17, 2015
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A calender roll for a papermaking machine includes: a substantially cylindrical core; and a cover circumferentially surrounding the core. The cover comprises: a base layer circumferentially overlying the core; and a topstock layer comprising polyurethane circumferentially overlying the base layer, the topstock layer being fiber-reinforced, the polyurethane having a glass transition temperature of between about 120 and 150° C., the topstock layer having a hardness of 70 to 90 ShD.
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