INFLUENCE OF FINISHING PRODUCTS ON SEWING NEEDLE PENETRATION FORCE

The present paper describes the influence of finishing products on needle penetration force during sewing. The variation of the needed force to pass through woven fabric is an important parameter to be checked. It is strongly depended on the characteristics of textile supports. As a result, varying structural properties of used samples can change the measured force values. So using only one fabric and varying the concentration of the products, would make it possible to clear up well the effect of the finishing products on the fabric resistance to needle penetration operation. Various treatments were applied such as mercerizing, water proofing, wash and wear, stiffening and softening. Many encouraging results were established. In that such parameter decreased in the case of using products improving threads movement for instance the softening products. However, it rose when making films on the fabric surface for example the waterproofing process.