Unlike weaving, which requires two yarn sets, knitting is possible using only a single set of yarns. The set may consist of a single yarn weft knitting or a single group of yarns warp knitting. In weft knitting, the loops of yarn are formed by a single weft thread.
The loops are formed, more or less, across the width of the fabric usually with horizontal rows of loops, or courses, being built one loop at a time. In warp knitting, all of the loops making up a single course are formed simultaneously.
Thus the lengths of each vertical column of loops, the wales, increase at the same time. The knit loop may be characterized by its geometry or by the way in which it is viewed by an observer. Geometrically, an open loop is one in which the forming yarns do not cross at the bottom of the loop.
In a closed loop, yarn crossing takes place. The concept of face and back loops requires an observer. If the loop formation seems to be toward the observer, then a face loop is formed. If the loop formation seems to be away from the observer, then a back loop is formed. Although face and back terminology is not well-defined, it serves a definite purpose in the characterization and analysis of weft knitted structures. In both warp and weft knitting, the principal mechanical elements used to form loops are needles.
The most common type of needles, used in both warp and weft knitting, is the latch needle. The latch needle, developed in the mid s, is so named because it can be closed using a latch which is activated without any special assistance during the knitting process.
The movements of a latch needle in forming a knit loop are as follows. In the running position the held loop rests on the top of the open latch. Clearing occurs as the held loop slips off the latch and onto the stem as the needle moves upwards. A downwards movement enables the needle hook to engage a new piece of yarn, this is known as feeding. As the needle continues downwards, the latch is forced to close under the influence of the held loop.
Knockover occurs as the held loop disengages from the needle. Following knockover loop pulling occurs and a new knit loop is formed. The needle must now return to the running position to complete the cycle. It should be noted that the held loop remains at the same height during the cycle, this is essential otherwise clearing, knockover and loop pulling would not take place. Control of the held loop is usually achieved by the use of sinkers or by the application of the tension to the fabric.
This method requires thousands of clues. For this reason, in warp knitting, the yarn needed for knitting is twisted on spools and fed to the machine. Comparison of warp knitting and weft knitting and the uses of produced fabrics.
Your email address will not be published. Remember me Log in. Lost your password? Each yarn forms loops along the fabric The loops created across the width of the fabric are also connected together The number of clues required for the texture of a warp knitting fabric depends on the width of the fabric and the lateral density of the fabric rings In contrast to the weft knitting method that is possible to produce fabric with a few threads.
In weft knitting, it is possible to produce fabric even with a bundle of yarn, so it is an easier way to turn yarn into fabric. In weft knitting, it is possible to produce more diverse texture and use different types of yarn in comparison to warp knitting. These terms are technical terms mostly used when discussing machine knitting, although weft knitting can be done by hand, too. There is a lot to learn about weft and warp knitting, so continue reading to expand your knowledge of the ancient art of knitting.
Weft and warp knitting are completely different knitting techniques that result in two different types of fabrics. The most obvious difference in these two techniques is that weft is a yarn that runs back and forth, while warp is a yarn that runs up and down. Due to these different techniques, the finished product is entirely different, too. For example, weft knitting can produce shaped garments and highly drapeable fabrics while warp knitting produces only coarse yardage. Weft knitting, which can be done by hand or machine, uses a continuous thread to form courses and loops in the fabric.
This technique can produce either fabric yardage or shaped garments such as circular fabrics. Due to the fact that it uses one continuous thread to create a finished product, it is very hard to unravel and creates a very elastic and thin fabric.
However, this fabric is more likely to shrink than fabric created using warp knitting, and needs to be washed and dried by hand rather than in a machine.
While weft knitting offers many more options in terms of finished products, the technique is generally more complicated and takes a longer time to complete. On the other side of the knitting spectrum is warp knitting.
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