Press felt for paper making and a method of manufacturing...

B - Operations – Transporting – 32 – B

Patent

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Details

28/11, 92/21.6

B32B 5/02 (2006.01) D04H 13/00 (2006.01) D21F 7/08 (2006.01)

Patent

CA 1204316

Abstract of the Disclosure A press felt for conveying a paper web through a press section of a paper machine and comprising a support fabric (1) formed of a yarn structure and a fibre bat layer (2) formed of fibres and needled to the support fabric at least on one side thereof. The support fabric and the fibre bat layer are filled with a filling material (3) from one surface of the felt to the other so that the felt has an air permeability of less than 0.5 m3 of air/m2 of felt per minute under an air pressure of 100 Pa. The fibre fineness of the fibre bat is preferably at least 6 den. The felt formed by the fibre bat layer and the support fabric is preferably filled from the surface facing the paper with a rubber or resin emulsion so that the filled felt retains at least 45 % of its original thickness under a compressive pressure of 10 MPa, in order to avoid blowing and rewetting at a conveying speed of up to 1000 m/min.

416919

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