Unidirectionally fiber-reinforced endless winding ply

US11911980B2 · kind B2 · utility

Assignee

• Profol GmbH · DE

Inventors

• Helmut Bayer · Wildberg, DE
• Konrad Maier · Bubesheim, DE

Key dates

• Filing date: Oct 30, 2019
• Grant date: Feb 27, 2024
• Expiry date: Aug 23, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/19
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a single-ply semi-finished product web which is reinforced with unidirectionally orientated continuous fibers and exhibits a movement direction and comprises a matrix containing at least 60% by weight of one or more thermoplastic polymers selected from the group consisting of polyamide, polyolefin and mixtures thereof and comprising welding seams of overlapping fiber-reinforced semi-finished product web segments at periodically occurring intervals, wherein the fiber plies of the fiber-reinforced semi-finished product web segments overlap, wherein the thickness of the semi-finished product web in the region of the welding seams is at least exactly as high as the arithmetic mean of the other regions of the semi-finished product web, and wherein the width of the regions of the welding seams is more than 1 mm to 8 mm in the movement direction, and wherein the thickness of the semi-finished product web in the regions outside the regions of the welding seams is 0.01 mm to 0.40 mm, and wherein the unidirectionally orientated continuous fibers enclose a predetermined angle with the movement direction, the value α of which is in the range of more than 0° to 90°, and…