Fabric

There are several important effects of crimp on Fabric Properties:-

1. Abrasion Resistance: If crimp percentage is high then the resistance of the fabric will be higher.
2. Shrinkage: If crimp percentage is high then the shrinkage of the fabric will be lower.
3. Handle Properties: When the crimp percentage is higher, the softness of the fabric will be fiber. Simultaneously stiffness of the fabric will be lower.
4. Fabric Design: Required extensibility is achieved by controlling crimp.

Now, how can we measure the crimp percentage of a fabric or yarn?
Here I will show you a way that is followed by WIRA Crimp tester machine.
Firstly a thread (which may be warp or weft) is collected from a fabric with crimp. Now the crimped length is measured. The length will be found is the cloth length which is denoted by “p”.
Now, the yarn is straightened and measured. A length will be found which is denoted by “l”.
So the Crimp % of the Fabric will be =     l-p/p- × 100
In this way several crimp percentage measurement is done and result is taken. By using all of the result and mean value is derived.