Patent ID: 6425985
Filing Date: 2002-07-30
Classification: D21F,Y10S,Y10T

Abstract:
A press felt comprising:a body formed of a plurality of threads arranged in a longitudinal direction and in a transverse direction, and a crill layer arranged at least on the surface of the body facing the web to be dried, wherein a texture of the press felt comprises a portion of a water soluble material arranged to provide a desired permeability for the yet uncompressed press felt, and wherein the press felt is arranged to be installed in a paper machine in a manner such that when being installed, the press felt comprises a portion of said water soluble material arranged to wash away or be washed off from the texture of the press felt at least partly later on during the operation of the paper machine as the initial density provided by the water soluble material is no longer needed, because the texture of the press felt has become dense by the impact of compression, and the water soluble material dissolves in water of the paper machine.