Felting Needle Design and Barb Geometry
topic
Felting needles are manufactured from high-carbon steel wire with working section geometries of triangular, star, or fork cross-sections carrying notch or crown barbs at defined intervals along the needle blade that engage and drag fibres during penetration, with barb depth, angle, and spacing determining fibre capture per stroke and the degree of fibre reorientation achieved per needle pass through the web.
Role
Determines the fibre entanglement mechanism and efficiency at each needle penetration through barb geometry that controls how many fibres are engaged and displaced per needle stroke, with needle type selection for each fibre and web weight application being a critical process parameter that governs entanglement quality, fabric structure, and needle service life that must be balanced against fibre damage from excessive barb aggressiveness.