Memory properties of shape memory fiber/cotton woven fabrics with high tightness

To study the memory properties of shape memory woven fabric with high tightness,fifteen shape memory fiber(SMF)/cotton woven fabrics of high tightness in which SMF showed different distributions in warp and weft were designed and developed for the experiment together with a reference fabric on shape memory property.The results show that the numerical value of shape fixity ratio of all the fabrics is in high consistency level.As a whole,with the increase of SMF content the shape recovery ratio rises more distinctly in warp direction than in weft direction.If the tightness in one direction of a fabric is higher than a certain limit the frictional resistance between warp and weft would cause insufficiency of shape recovery in the other direction.The contraction and shear effect caused by tensile loading on one direction of a fabric make it have certain shape memory property in the other direction even if SMF is distributed only in one direction.When high tightness woven fabrics have a fixed SMF content or have no SMF at all in one direction,the shape memory properties in the other direction would rise with the increase of SMF content.