Press Felt for Papermaking
AssigneeIchikawa Co., Ltd.
InventorsAkira Onikubo, Shin Kawashima, Hiroyuki Oda
Life of this patent
Estimating the term…
Abstract
A press felt comprises a base body, a wet paper web side batt layer, and a press side batt layer. The wet paper web side batt layer includes a web contact side batt layer and a base body side batt layer, the latter being composed of core-in-sheath fibers with a core of high molecular weight nylon with an absolute viscosity of 80 mPa·s or more and a sheath of nylon with a lower melting point than the core. The wet paper web contact side batt layer is made of nylon fibers which are not core-in-sheath fibers.
Claims8
A press felt for papermaking comprising a base body and a batt layer having a wet paper web side layer and a press side layer,
- characterized in that said wet paper web side layer is composed of a wet paper web contract side batt layer and a base body side batt layer,
- said base body side batt layer having a core-in-sheath fiber comprising a core member made of high-molecular-weight nylon with an absolute viscosity of 80 mPa·s or more and a sheath member made of nylon with a lower melting point than the core member;
- and
- said wet paper web contact side batt layer being made of nylon without said core-in-sheath fiber.
3-4. (canceled)
Dependencies are inferred from the claim text.