In weaving, warp and weft are the two technical terms used to denote the two types of threads that make the finished woven fabric. The lengthwise threads in any fabric structure identify the warp while the widthwise thread that is filled into the warps are called wefts. Warp knit fabric is produced through warp knitting in which each needle in the warp knitting machine
loops its own thread and make parallel rows of loops that are interlocked in a zigzag pattern.
The distinguished features of a warp knit fabric are the floats seen on the fabric surface. These floats are often called laps or underlaps. The front side of the fabrics have vertical floats while the backside have horizontal floats both with a slight angle. Warp knit fabrics are made with the help of seven types of warp knitting- Tricot knit; Milanese knit; Simplex knit; Raschel knit; Ketten Raschel knit; Crochet and Weft-insertion warp. Warp knitting is liked by most of the fabric manufacturers as it is a very fast process and can make fabric with a dimensional stability which is almost equal to that of a woven fabric. They all look like embellished fabrics due to their textural effects, especially the fabric made through crocheting which are used in making ,crocheted clothing
as well as crochet trim
. Other reasons for the popularity of warp knit fabrics are its smoothness, sheerness, wrinkle resistance, shrink resistance, strength and abrasion resistance.