Current U.S. Bicomponent Fiber Producers: ES FiberVisions; Fiber Innovation Technology (FIT), Foss Manufacturing

Definition: Bicomponent fiber is comprised of two polymers of different chemical and / or physical properties extruded from the same spinneret with both polymers within the same filament.

Bicomponent Fiber Capabilities

Bicomponents can provide:

  • Thermal bonding
  • Self bulking
  • Very fine fibers
  • Unique cross sections
  • The functionality of special polymers or additives at reduced cost

Common Bicomponent Configurations

Most commercially available bicomponent fibers are configured in a sheath / core, side-by-side, or eccentric sheath / core arrangement.

Advantages of Bicomponent Thermal Binder Fibers

  • Uniform distribution of adhesive
  • Fiber remains a part of structure and adds integrity
  • Customized sheath materials to bond various materials
  • Wide range of bonding temperatures
  • Cleaner, environmentally friendly (no effluent)
  • Recyclable
  • Lamination / molding / densification of composites.

Common Polymer Combinations in Bicomponent Thermal Binder Fibers

  • Polyester Core (250C melt point) with Copolyester Sheath (melt points of 110C to 220C)
  • Polyester Core (250C melt point) with Polyethylene Sheath (130C melt point)
  • Polypropylene Core (175C melt point) with Polyethylene Sheath (130C melt point)

Self Bulking Bicomponent Fibers

  • Created most often with side-by-side or eccentric cross section
  • Variation in orientation across the fiber causes crimping due to differential shrinkage or strain with applied heat or relaxation.