Resistance Reduction in Stretched Conductive Fabric – Why?

fabricresistance

I just purchased some conductive fabric and noticed that stretching the fabric reduced its resistance. This seems counter-intuitive since stretching a wire leads to an increase in its resistance. I have also found this video where you can see this happen. Why is this happening? How does stretching the fabric lead to drop in the resistance? and is there any relation between the two?

Best Answer

It probably causes closer contact between conductive bits, however note that your observation is not universally true. For example, this fabric from Holland Shielding has the following note:

When the material is stretched lengthwise, its conductivity increases; when you stretch it crosswise, conductivity decreases

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