Improvement of the paper web of dehydration in the paper machine and press felt of the press section for this

摘要

Press felt to be used in the press section of the resolution means papermaking machine improvement of dewatering of the paper web in the press section of the press felt for this and [challenge] papermaking machine. Is composed from the base fabric at least one batt layer is one sewing needle at least or in another appropriate manner, the felt is attached thereto. I can, or between the at least one layer of batt material and base fabric, non-woven fibrous scrim or woven fibrous scrim is included in or between the layers of any two or more. At least one of the base fabric, the fabric scrim layer or one, is composed of a polymer fiber is blended with the fiber, the elastic modulus of these fibers is lower almost than the elastic modulus of the polymer fibers at least batt material. Following the intermediate nip point of the press section, the press felt is manufactured in accordance with the teachings of the present invention results in a delay of springback resilient (ie, Z) in a direction perpendicular to the felt. The progress towards the intermediate nip point the separation position of post-nip of the paper web and felt, as a result, delay of the spring back, to reduce the re-wetting of the paper sheet. I have established that the fiber composed of regenerated cellulose derivatives such as viscose rayon, is effective for use as the low modulus component fiber press fabric of the present invention. [Selection] Figure Figure 1