First, the formation of elastic silk exposed 1. Air twi […]
First, the formation of elastic silk exposed
1. Air twist knot:
1) For rovings of 20 or less, because the content of spandex yarn is low, it is better covered in air twisting, so it generally does not appear.
2) More than 30 yarn counts. Because the yarn counts are thinner and have a higher content of spandex yarns, the fibers are easy to blow off during air twisting, and the elastic yarns are exposed to repair this phenomenon One more.
2. Partial yarn: When covered, the elastic yarn is not wrapped in the yarn core, but is exposed on the surface of the yarn, and the exposed elastic yarn is picked out to form a broken yarn.
Appearance in finished fabrics
The elastic yarn exposed by air twisting is generally 0.3cm to 0.5cm or less, and the length is about 1cm. The appearance and size of Ruth are related to the quality of the twisting.
Generally, the fabric will not appear when it is light-colored, and it will appear white when it is dark-colored. But why do some cloth surfaces appear more and some cloth surfaces appear less? This has a lot to do with the organization of the fabric.
1. Plain weave (1/1): the appearance rate of air-twisted white silk is 50%
2. Twill (2/1 3/1)
1) Because there are few latitude floating points on the front side, the general situation is not easy to appear.
2) When the customer reverses the direction, the reverse weft floating point lengthens, and the exposure rate of white silk increases. For the fabric organization, the appearance rate of white silk is 3 / 1≥2 / 1≥1 / 1.
At present, the elastic yarn mill has no good solution to the exposure of the elastic yarn caused by air-twisting. It is also inevitable in production. Depending on the yarn thickness and fabric structure, there may be 1 or 2 white yarns within 1 meter. . If there is a problem in spinning that causes small reeds, the corresponding air entanglement opportunities will increase, which will increase the probability of dense elastic yarns being exposed, but this is an individual phenomenon.