| 摘要 |
<p>A press felt for a papermaking machine comprises at least one base fabric layer to which at least one batt layer is attached, preferably by needling. A woven or nonwoven fibrous scrim may be included between any two layers in the felt. At least one of the base fabric, the batt layer or layers, or the scrim comprises regenerated cellulosic staple fibers, together with polymeric fibers. Additionally, regenerated cellulosic material can be provided in the scrim, or in yarns in a woven base fabric. The regenerated cellulosic fibers can have a modulus of elasticity substantially less than that of the polymeric fibers. The press felt provides a retarded elastic spring-back in the vertical direction of the felt following the mid-nip point in the press section, advancing the post nip separation position of the felt and the paper web towards the mid-nip point, thus reducing rewetting of the paper sheet.</p> |
