Effect of some interfacing fabrics on buttonholes appearance quality for knitting fabrics

Weft knitting fabrics is considered one of the most industries in our society , due to its characteristics, this industry doesn't have enough care especially , knitted blended with lycra.
     Buttonholes appearance affect on the outside wear appearance, so this research tries to study some kinds of interfacing fabrics (woven - nonwoven- elastic nonwoven) its direction (length – width-45° curve angle)  and some sewing thread (100% polyester, 100% cotton) on buttonholes on two weft knit fabrics (single jersey) for this study (100% cotton and cotton/ lycra 95:5% ) to obtain the best functional and aesthetic values, so that  laboratory test buttonhole appearance after washing was done
     The research found that the best interfacing fabrics on 100% cotton  jersey with 100% polyester sewing thread was woven interfacing in direction length then elastic nonwoven in direction length then nonwoven in direction length, while the best interfacing fabrics with 100% cotton  sewing thread , with the same fabrics was woven fabric in direction length then elastic nonwoven in direction width then nonwoven in direction width,  and the best interfacing fabrics on 95% cotton:5% lycra  jersey with 100% polyester  sewing thread was elastic nonwoven with direction 45° curve angle then nonwoven in direction length then woven  with direction 45° curve angle while the best interfacing fabrics with 100% cotton  sewing th95read , with the same fabric was woven fabric in direction 45° curve angle then nonwoven in direction length then elastic nonwoven in direction width