Jacquard knitting

Jacquard knitting is usually carried out with ground yam knitting and the coloured yams plated over it in the area of the jacquard. In this way, the ends of the coloured... 

Raschel Warp knit raschel fabrics are produced in a similar way as tricot fabrics except for their stitch motions. The motion results in elastic yams being put into raschel construction as lay-in-yams versus knit-in yams on tricot constractions as shown in Figure 3.7. This lay-in stmcture leads to the raschel fabrics with elastic stretch in the length direction. Other elastic bar movements are possible to increase stretch and modulus in width. Raschel machines can have up to 64 yam guide bars to produce fabric patterns as extensive as jacquard lace. Elastomeric fabrics made by raschel showed good elastic stretch, recovery, and modulus in both length and width directions as elastic yam lap increases. 

On the finished article, the logos can be knitted on either the outer or inner fabric face. For example, a brand name on the outside and washing instructions on the inside. The jacquard facility is also used on garment panels to mark out where cutting should take place prior to sewing. 

An article (Anon., 2002b) has reported on the possibility to produce cloth shoes with warp-knitted spacer fabrics on the Raschel machine. Prefabricated products and the application of various functional zones can be realized if the machines are equipped with a Jacquard pattern. The Jacquard pattern is a binding technique in which each warp thread is individually controlled allowing for a maximum range of production possibilities. The subsequent processing, for example, laminating, is easily possible. Examples are shown in Section 14.2.2. 

The electrodes are knitted on a first needle bed and then the base fabric is made on the second needle bed, which is opposed and facing the first one. The use of the well-known knitting technique intarsia allows the realization of an independent region with different threads without loose yams visible on the reverse side as with the Jacquard technique. In the case of intarsia, it has been possible to use for the same course two yam carriers one for the conductive thread and the other one for the nonconductive thread (Paradiso, 2004). 

Whereas in the days before computers the patterns were read from punch cards, today the patterns are fed into the Jacquard machine directly from the computer. The information on whether the needle is supposed to pass, tuck, or knit is passed on directly to each needle. All three possibilities are combined in one cam part (Fig. 5.8). The needle foot can be moved out of the guiding channel in two places. In the position 1st selection, the needle can either remain in the position pass or move into tuck in the position 2nd selection, the needle can either remain in tuck or move into knit. ... 

Figure 5.9 shows the different mechanisms in the Jacquard technique. Normally, the needle is in the knit position unless its sinker foot is expelled from the cam groove, which causes the needle to either tuck or pass. ... 

Increasing use of the Jacquard technique for the production of very fine circular knits. 

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