Defocused laser drilling process for making fabric forming...

Details Defocused laser drilling process for making fabric forming... Defocused laser drilling process for making fabric forming...

D - Textiles, Paper

04

B

D04B 39/00 (2006.01) B23K 26/38 (2006.01) D04H 1/46 (2006.01)

Patent

CA 2158392

A topographical support member and method of forming a topographical support member for use in producing nonwoven fabrics, especially tricot-like nonwoven fabrics. The topographical support member includes a body having a top surface comprising a pattern of a plurality of peaks and valleys and a plurality of apertures. The apertures have a conical top portion that is surrounded by a cluster of the peaks and valleys. The center line to center line spacing of adjacent apertures is less than the major diameter of the conical top portion of the apertures. The topographical support member is formed by focusing a laser beam so that the focal point is below the top surface of a starting workpiece and drilling with the laser beam the predetermined pattern of tapered apertures. The pattern of tapered apertures forms the cluster of peaks and valleys surrounding each aperture on the top surface of the resulting support member.

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