Popular yarn | Potbelly yarn: new stuff, different style!

Big belly yarn refers to the thick and thin yarn on one yarn in the finished woolen yarn. It is one of the appearance defects of the finished woolen yarn. Big belly yarn is suitable for making sweaters in winter. The personalized style is very fashionable.

Big belly yarn refers to the cross section It is more than 3 times thicker than normal yarn, 2-10cm in length, and in the shape of a jujube core. Reason for formation:

(1) Equal-length fibers are concentrated and not drafted Develop to produce clusters;

(2) Fibers are sticky and merged , carding cannot be stretched;

(3) Front roller pressure Inadequate;

(4) The middle friction boundary is too strong, control Too strong;

(5) The top roller is too thin or cracked , loss of elasticity, etc.

The full English name of big belly yarn is: big belly yarn Big- belly Yarns

In recent years, the proportion of potbelly yarn in fancy yarns has become larger and larger, and the potbelly has become thicker and thicker, and the application equipment has become more and more extensive. The gauze produced by various different equipments has different styles. For example, the cotton spinning frame is modified to produce big-belly yarn. This kind of big-belly yarn does not require core and covering yarns and is spun in one go on the spinning frame. The equipment modification is very simple. The electromagnetic clutch is used to stop the front roller gap, and the belly yarn can be produced. However, this kind of big-belly yarn cannot be spun too thick. The average count is about 6 inches (97tex). It is difficult for the wire hoop to pass through if it is too large. This kind of belly yarn is mostly used to make wavy threads in fancy threads or to make fancy thread wrapping threads through space dyeing. Some of them are also used to make knot-like chenille threads.
Another example is the belly yarn with core and sheath yarns produced by the fancy twisting machine. This type of belly yarn is the simplest to produce. Shaku has the most advanced imported equipment for belly yarn. The roving passes through the middle and rear rollers. The overfeeding in the gap generates a belly yarn. The output of the front roller merges with the core wire and then enters the hollow spindle bar to add the wrapped thread. This kind of belly yarn can be formed at one time, and the twist of the wrapped thread at the belly and details is basically Consistent. Therefore, this kind of belly yarn feels rough and hard. If there is a certain overfeed ratio between the decorative thread and the core thread, the corrugated belly yarn can also be formed at one time, but it cannot be spun too thick, usually around 1.5Nm. The basic difference between pot belly yarn and slub yarn is the thickness gap between it and the base yarn. The thick sections of slub yarn are generally within 5 times thicker than the base yarn, and most slub sections are controlled within 2 Within times. Therefore, in the whole yarn, the slubs disappear and appear less obvious. When used, a yarn with the same density as the base yarn is often used after plying and twisting; while the big belly yarn is between the big belly and the base yarn. The ratio is more than 5 times, sometimes even more than 10 times, so the potbelly is very obvious.

Another difference is: slub yarn requires the slub to be short and the base The yarn part is very long, usually no more than two bamboo sections per meter; while the big belly yarn is sometimes longer than the big belly. The belly area has less twist and is prone to hair formation, so it is often wrapped with a piece of hair when using it.Thinner filaments or other short fiber yarns are sometimes wrapped with left and right twists, that is, one is twisted to the left and the other is twisted to the right; sometimes they are even wrapped with an outer casing on the syringe machine to increase the number of threads. It is so strong that hair on the belly is less likely to develop during dyeing. This method of wrapping wire cannot be twisted on an ordinary ring twisting machine, because when twisting with a ring twisting machine, the twist is concentrated in the details, and the thick parts of the belly cannot be wrapped with twist, so the twist is added Hollow spindle twisting machines or wrapping machines are often used for yarn production.

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