Valmet Technologies Oy

Valmet Technologies, Inc.

Metso Fabrics Inc.

Kati Mikkonen

Tauno Virtanen

Jorma Naamanka

Satu Hagfors

A press felt for use in paper, cardboard or tissue machines has at least one base fabric (), and fiber layers () attached to the base fabric (). The press felt fiber layers () include thermoplastic elastomer fibers of thermoplastic elastomer originating from bio-based raw material and/or carbon-dioxide based raw material.

Press felt

The invention relates to a base fabric of a press felt. The base fabric comprises end regions which are provided with seam loops (). The seam loops are slanted. Further, the invention relates to a press felt and a method of forming the same.

Base fabric, press felt and method of forming base fabric with seam

A method for manufacturing a press felt with a seam, to a press felt, and a base fabric of a press felt. The base fabric is a one-base structure with machine direction yarns forming seam loops and further machine direction yarns running in the web-side surface layer. The machine direction yarns weave with cross yarns. The yarn ratio of the surface layer machine direction yarns to the intermediate layer and further the bottom layer machine direction yarns is at least 2:1:1. In addition, the surface layer machine direction yarns have a long run and their cross-sectional area is smaller than the yarns forming the seam loops.

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Tampere, Finland

Kati Mikkonen