Press felt with base fabric layer which includes regenerated cellulosic fibers
AssigneeAstenJohnson, Inc.
InventorsMarc P. Despault, Brady S. Patterson
Life of this patent
Estimating the term…
Abstract
A press felt for use in the press section of a papermaking machine is provided. The press felt includes a base fabric layer and at least one layer of a staple fiber batt material connected thereto. The press felt has a paper side surface (PS) which when in operation is in contact with a paper web conveyed thereon and a machine side surface (MS) which contacts various press section components. The base fabric layer includes a regenerated cellulosic component in either or both the MD and CD yarns. Regenerated cellulosic fibers may also be provided in the batt and/or scrims located in the batt to improve dewatering when compared to similarly constructed felts which lack this regenerated cellulosic material.
Claims22
A press felt for use in the press section of a papermaking machine, the press felt comprising:
- a base fabric layer comprising interwoven yarns that extend generally in a cross direction (CD) and a machine direction (MD), wherein at least a portion of at least one of the MD and CD yarns comprise a regenerated cellulosic material;
- and
- a layer of a staple fiber batt material connected to the base fabric layer, the staple fiber batt material is comprised of between 20% to 80% by weight of a regenerated cellulosic staple fiber having a dtex from at least about 1.1 to about 44, and from 80% to 20% by weight of a polymeric staple fiber, the press felt having a paper side surface (PS) which when in operation is in contact with a paper web conveyed thereon and a machine side surface (MS) which contacts various press section components.
Dependencies are inferred from the claim text.