Bicomponent Spunbond for Specialised Applications
topic
Bicomponent spunbond machines extrude two different polymer components through the same spinneret orifice in core-sheath, side-by-side, or segmented-pie cross-sections, producing filaments that combine properties of both polymers such as polyester core for strength and polyethylene sheath for low-temperature thermal bonding, or PET-PP side-by-side configurations that self-crimp after drawing to create bulky three-dimensional web structures.
Role
Extends spunbond capability to specialised fabric properties unachievable with single-component filaments by combining polymer components that contribute different functional properties to the bicomponent filament, with bicomponent spunbond enabling production of thermally bondable polyester fabrics, self-crimping bulky webs for filtration and wipes, and gradient cross-section filaments for specific wetting and barrier property combinations.