What is big belly fancy yarn (short for big belly yarn)

Today, let's talk about what is big belly fancy yarn (called big belly yarn for short), the difference between big belly yarn and slubby yarn, and how we use spinning machine and roving machine to spin big belly fancy yarn.

1、 The fundamental difference between big belly yarn and slubby yarn:

1. The thickness difference between the yarn and the base yarn.

Slub yarn: the ratio of the diameter of the slub to the diameter of the base yarn is less than 5 times. Most bamboo knots are controlled within 2 times. In the whole yarn, bamboo knots are not very obvious.

The ratio of slub to base yarn diameter is more than 5 times, sometimes even more than 10 times, so the belly is very significant.

2. Coarse pitch length

Slub yarn: the coarse knot is very short, and the base yarn is very long. Generally, there are no more than two knots per meter.

Big belly yarn: thick knot is sometimes longer than base yarn. The large belly has less twist and simple hair. When used, it is often wrapped with a thin filament or other staple yarn. Sometimes use left and right twist to cross package; Sometimes it is even wrapped with a layer of outer sleeve on the needle machine to add its strength.

2、 Spinning large belly yarn on spinning frame

Method: The electromagnetic clutch is mainly used to stop the front roller, so that the fibers sent by the middle and rear rollers accumulate behind the front roller. When the clutch is closed, the accumulated fibers are taken away to form a big belly.

Note:

1. When producing large belly yarn, the weight of roving can be increased and the back draft can be reduced.

2. The production of large belly yarn on the spinning frame is limited by the wire ring and package, so the spinning frame is suitable for producing small large belly yarn.

3. This kind of big belly yarn can be processed into wavy yarn on fancy twisting machine, which can make the big belly more prominent.

3、 Roving machine produces large belly yarn

The large belly yarn of about 2000 tex can no longer be produced on ordinary spinning machines.

way:

1. The middle and rear rollers are used on the roving frame to produce large belly yarn.

Because of the low twist of the roving frame, it is necessary to combine the large belly yarn with one or two strong filament or staple yarns for twisting, and use two solid yarns to twist left and right on the hollow spindle or the wrapping machine.

2. The commonly used large belly yarn is 100~1000 tex (1~10 metric yarns).

3. The raw materials are wool and acrylic fibers.