Needle Punching

Needle Punching Density & Penetration Depth Tool

Punch density and penetration depth are set independently and do different jobs. Density builds strength; depth decides which barbs are doing the work.

Needle Loom Boards
strokes/min
needles/m
no.
Penetration Needle
mm
mm
Web Running
m/min
m
g/m²

Punch Density

— punches/cm²

All needle boards combined

Line & Needle

Punch Density per Board
— punches/cm²
Web Advance per Stroke
— mm
Barbs Clearing the Web
— no.
Line Output
— m²/h
Line Output
— kg/h

Advance per stroke is the drafting mark control: too large and the needling stripes, too small and the web is over-worked and loses tensile in the machine direction.

Needle Punching Density & Penetration Depth Tool — free, with the formula and a worked example, at Textile School.