What distinguishes weaving yarn from knitting yarn?
Higher evenness, good softness, a particular strength, extensibility, and twist are requirements for knitting yarn as opposed to weaving yarn. The yarn is subjected to intricate mechanical action during the knitting machine's process of creating knitted cloth. For example, bending, twisting, stretching, friction, etc.
The following specifications must be fulfilled by the knitting yarn in order to guarantee regular manufacturing and product quality:
1. A specific amount of strength and flexibility should be present in the yarn.
One crucial criterion for knitting yarn quality is yarn strength.
The knitting yarn needs to be strong since it will be repeatedly loaded and subjected to a particular tension throughout the preparation and weaving process.
Furthermore, the knitting yarn must have a specific amount of extensibility in order to permit bending into a loop during the knitting process and minimize yarn breakage, as the yarn is also subjected to torsional distortion and bending throughout the knitting process.
2. The yarn should be reasonably soft.
Knitting yarn has a higher level of softness than weaving yarn.
Soft yarn is simple to bend and twist, which can result in a uniform loop structure in knitted fabric, a clear and lovely appearance, and a reduction in yarn breakage during weaving as well as damage to the looping machine.
3. There should be a specific twist to the yarn.
The twist of knitting yarn is typically less than that of weaving yarn.
An excessively big twist will result in poor yarn softness, difficulty bending and twisting during weaving, and kinking, which can cause knitting needle breakage and weaving flaws;
Furthermore, yarns that twist too much can distort the loops and reduce the knitted fabric's flexibility.
The knitting yarn's twist should not be too low, though, as this would weaken it, increase breakage during weaving, and make the yarn bulky, which will make the fabric more likely to pill and less wearable.
4. The yarn should have a consistent linear density and fewer defects.
Yarn linear density One crucial indicator of knitting yarn quality is uniformity, which is the consistency of yarn evenness.
In order to guarantee a consistent stitch structure and a clear cloth surface, uniform yarn is advantageous to the knitting process.
Since the knitting machine has several loop-forming systems, the yarn is fed into loops simultaneously. As a result, not only must the thickness of each yarn be consistent, but the thickness differential between the yarns must also be closely regulated to prevent the formation of horizontal stripes on the surface of the cloth. Shadows and other flaws lower the fabric's quality.
5. The hygroscopicity of the yarn should be good.
Different fibers have varying capacities for absorbing moisture, and the amount of moisture absorption changes according to air temperature and humidity.
A particular amount of hygroscopicity should be present in the yarn used to make knitting.
In addition to having strong electrical conductivity, a yarn with good hygroscopicity also helps to stabilize the twist and enhance its extensibility, which results in good weaving performance under the same relative humidity conditions.
6. The yarn should have a low coefficient of friction and a nice finish.
The knitting yarn should be as smooth and as devoid of contaminants and oil stains as possible.
Unsmooth yarns lead to significant wear and strain on machine parts, which are prone to damage, and there are a lot of flying flowers in the workshop, which has an impact on the quality of the fabric and the knitting machine's productivity in addition to the workers' health.