Thursday, October 15, 2015

Knitting


Knitting: Knitting is a method in which fabrics are produced by set of connected loops from a single series of yarn in weft or warp direction.


knit fabric  is made by the longitudinal and vertical repetition of the same element, the loop, which is the basic element of the fabric.


                                    
                            
                                                               Knit fabric

The loop :The loop is a length of yarn that is forced to assume a curvilinear shape. It can be
divided into three main sections:
                                                            
                                                                        The loop
knit fabrics can be divided into  two types:    
1. Weft knit fabric
2. Warp knit fabric


 Weft knit fabric: In weft knits  the interloop links two consecutive loops placed horizontally; when one loop breaks, the entire fabric can be undone simply by pulling the free end of the yarn.
                                            
                                                                    Weft knit fabric
Warp knit fabric: In warp knits  the yarn is knitted vertically or diagonally and loops are formed
Accordingly; to knit the fabric, it is necessary to use many threads simultaneously, allowing the
loops formed by the different threads to bind together.
                                        
                                                                   Warp knit fabric
In this case, the knit fabric is run-proof . Therefore, the warp knit fabrics are also called “nonrun“
or “ladder-proof “.From a physical point of view, a fabric can be described as a flexible structure, made up by the vertical and horizontal repetition of two elements: the course and the wale.The word “course” defines a row of horizontal loops, belonging or not to the same yarn; “wale”means a row of loops laid vertically one upon the other.




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                                                   Course and wale of a weft knit fabric

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