Why Crimp Is Important?
1. Bulkiness and Loft
Higher crimp creates more space between fibres:
Improves loft
Increases filling power
Makes products feel fuller and softer
Used in:
Pillows
Cushions
Quilts
2. Resilience and Recovery
Crimped fibres can:
Compress under pressure
Recover their shape after release
This gives:
Better spring-back performance
Longer-lasting products
3. Fibre Cohesion
Crimp increases friction between fibres:
Helps fibres hold together
Improves performance in:
Carding
Nonwoven production
4. Thermal Insulation
Crimp creates air pockets:
Air = poor heat conductor
Result = better thermal insulation
Ideal for:
Winter bedding
Insulated garments
Crimp Level: Higher Is Not Always Better
Different applications require different crimp levels:
Application Recommended Crimp
Pillow filling High
Cushion filling Medium–High
Nonwoven Medium
Spinning Lower
Too much crimp may:
Affect processing stability
Increase entanglement
Practical Insight for Buyers
When selecting PSF, crimp should be evaluated together with:
Hollow ratio
Fibre fineness (denier)
Cut length
For example:
High crimp + high hollow = maximum bulk and softness
Moderate crimp = better processing performance
✅ Conclusion
Crimp is a key structural parameter in polyester staple fibre that directly impacts:
Bulkiness
Resilience
Processing performance
End-product quality
Understanding and selecting the right crimp level helps ensure that the fibre meets the specific requirements of different applications.