Weft Knitting PDF

Textile Institute of Pakistan, Karachi. TEXT302 (Knitting Technology) Introduction  Knitted fabrics provide comfortable wear to almost any style of garment.  Most knits contour to the body's silhouette without restricting movement because of its open s...

Textile Institute of Pakistan, Karachi. TEXT302 (Knitting Technology) Introduction  Knitted fabrics provide comfortable wear to almost any style of garment.  Most knits contour to the body's silhouette without restricting movement because of its open structure.  This makes knit fabrics ideal for innerwear, body wear and sportswear garments.  While many variations of knit fabrics exist such that used for hosiery, there are two basic types of knit fabrics - weft knits and warp knits.  It is the direction in which the yarns making up the fabric are looped that determines which type of knit the fabric is.  From these two types of knit fabrics come various subtypes that consumers encounter in fabric stores and read within garment descriptions. Weft Knitting  Weft knitting is the simplest method of converting a yarn into fabrics.  Weft knitting is a method of forming a fabric in which the loops are made in horizontal way from a single yarn and intermeshing of loops take place in a circular or flat form on a crosswise basis.  In this method, each yarn is fed, more or less, at right angle to direction in which fabric is formed.  Each course in a weft knit builds upon the previous knitted course.  Most of the weft knitting is of tubular form.  It is possible to knit with only one thread or cone of yarn, though production demands have resulted in circular weft knitting machines being manufactured with up to 192 threads (feeders). Common Weft Knits  As in woven fabric structures, three weaves, are called as basic weaves, viz., plain, twill and satin.  In the similar way, in a weft knitting structure, the following four structures are considered as basic weft knit structures. 1. Plain fabrics 2. Rib fabrics 3. Purl fabrics 4. Interlock fabrics  Plain fabrics, also known as single jersey, have an identifiable right / face and wrong / back side.  Other types are known as double jersey, just as the name implies, uses two sets of yarns on opposed needles resulting in a heavier fabric that looks the same on either side. Prepared By: Engr. Shakeel Ahmad Paracha Page 1 of 2  Textile Institute of Pakistan, Karachi. TEXT302 (Knitting Technology)  Double knit fabrics have little stretch; retain their shape and works best for tailored garments.  Each type of these fabrics is unique in appearance and function. Plain fabric Rib fabric Purl fabric Interlock fabric Prepared By: Engr. Shakeel Ahmad Paracha Page 2 of 2