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There are several important effects of crimp on Fabric Properties

1. Abrasion Resistance: If the crimp percentage is high then the resistance of the fabric will be higher.
2. Shrinkage: If the 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 fabric or yarn?

Here I will show you a way that is followed by the WIRA Crimp tester machine.

Firstly a thread (which may be warp or weft) is collected from a fabric with a crimp. Now the crimped length is measured. The length will be found in 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 the result is taken. By using all of the results and mean value is derived.

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