Bicomponent Spunbond Nonwoven Fabric — Core/Sheath Filament Roll Material

Two polymers are co-extruded into a single filament, one forming the core and the other the sheath. In this construction the core is polyester and the sheath is nylon. The core carries strength and dimensional stability; the sheath, which reaches its softening point first, governs bonding, surface behaviour and how the fabric attaches to other layers.

A single-polymer web has to compromise between a surface that bonds easily and a structure that stays dimensionally stable when heated. A bicomponent filament separates those two jobs, which is why it is used where a converted assembly is thermally bonded or laminated and the substrate must not shrink or lose strength in the process.

Filtration converters use it where the support layer must be thermally bonded into a pleat pack or cartridge. Automotive and industrial converters use it as a carrier and backing in thermally assembled parts. It also serves as a substrate in laminated technical products where a bondable surface is required over a stable core.

Core and sheath ratio, filament fineness, basis weight, width, bonding pattern, tensile behaviour, softening range, colour and roll dimensions vary with the manufacturing specification. No fixed technical values or bonding temperatures are published on this page.

Send the basis weight, roll width, roll length and quantity, together with the application and the bonding or lamination process the fabric has to go through. State any strength, permeability or dimensional requirement your specification calls for.

Allzone confirms the core/sheath construction, basis weight and composition with the supplier before quoting and shares technical data for the exact material offered.