Comparison of patterning and fabric structures

Individual element movement (particularly of latch needles) enables weft knitting machines to produce designs and structures based upon needle selection for loop intermeshing and transfer. This also facilitates the production of garment parts shaped on the knitting machine. Weft knitted loops tend to distort easily under tension. Thus, yarn can freely flow from one loop to another that is under greater tension, a characteristic which aids form-fitting and elastic recovery properties. Change of yarn by horizontal striping is another major weft knitting patterning technique.

Most patterning on warp knitting machines is based on selective control over guide bar lapping movements and on the threading of the individual guides of each guide bar. Yarn change by striping is not available on warp threads.

Warp knitted threads tend to have an approximately vertical path through the structure, which makes the warp threads less likely to fray or unrove and, in the absence of weft threads allows almost any width up to the full knitting width to be achieved. Effects in open work and colour can be obtained without the use of special mechanisms. Lapping movements can be arranged to produce fabrics ranging from stable to highly elastic without changing the type of yarn.

Unit 13

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Knitwear designer: Job description and activities	\|	Selection Systems

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