Bicomponent fiber refers to a polyester staple fiber structure composed of two different polymers. The most common configuration in the industry is the sheath-core structure.
As for hollow conjugated fiber and low melt fiber, even though both are bicomponent polyester fibers, they are designed for completely different purposes.
Hollow Conjugated Siliconized Fiber (HCS)
This fiber is all about comfort.
Hollow structure → lightweight and insulating
Crimped fiber → creates volume and elasticity
Siliconized finish → smooth and soft
It is mainly used where softness and resilience are important.
Low Melt Fiber (LMF)
This fiber is all about function and structure.
Special sheath melts under heat
Bonds fibers together without glue
Helps products keep their shape
It is used where stability and bonding are required.
The easiest way to understand
HCS = makes products soft and fluffy
LMF = makes products hold together
In real production
These two fibers are often used together:
HCS → provides comfort
LMF → provides structure
This combination is common in:
mattress padding
thermal bonded filling
nonwoven products
How to choose
For soft filling → use HCS
For bonding / structure → use LMF
For balanced performance → use a blend
For more information about our polyester staple fiber products for spunlace, filling, and nonwoven applications, feel free to contact us for technical support and specifications.