Patent ID: 11926964
Assignee: VALMET TECHNOLOGIES, INC.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D | IPC D

Claim 0:
1. A press felt in a paper machine, a cardboard machine, a tissue machine or a press section of a pulp machine, the press felt comprising:
at least one base fabric comprising yarns comprising polyamide, and thermoplastic elastomer yarns comprising thermoplastic elastomer originating from at least one of bio-based raw material and carbon-dioxide based raw material, wherein the total amount of thermoplastic elastomer yarns in the at least one base fabric is at least 10 wt-% calculated based on the total weight of the at least one base fabric;
fiber layers attached to the base fabric, which fiber layers comprise thermoplastic elastomer fibers comprising thermoplastic elastomer originating from at least one of bio-based raw material and carbon-dioxide based raw material;
wherein the thermoplastic elastomer is thermoplastic polyurethane in the fiber layers, and the fiber layers further comprise 1 to 50 wt-% polyamide fibers calculated based on the total weight of the fibers in the fiber layers; and
wherein the total amount of bio-based raw material in the thermoplastic elastomer fibers is 30 to 70 wt-%.