Stitched unidirectional or multi-axial reinforcement and a method of producing the same

US9505193B2 · kind B2 · utility

Assignee

• Ahlstrom Corporation · FI

Inventor

• Rainer Bergstrom · Mikkeli, FI

Key dates

• Filing date: Jul 15, 2013
• Grant date: Nov 29, 2016
• Expiry date: Jul 15, 2033

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2305/20
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A stitched unidirectional or multi-axial reinforcement and a method of producing a stitched unidirectional or multi-axial reinforcement includes transversely arranging thin discrete flow passage forming means having a diameter of 70-300 μm in a direction transverse to the direction of the unidirectional rovings at least on the continuous rovings of the at least one layer, and stitching the thin discrete flow passage forming means and the continuous unidirectional rovings to one another to form a reinforcement.