High Tenacity 150d/3 100% Polyester Embroidery Thread

Product Name:

polyester embroidery thread

Characteristics:

Polyester embroidery thread is made of polyester filament. The thread is of good glossy effect, low friction, uniform twist, low breakage and low chromatic aberration.

Product types: 108D/2, 120D/2, 150D/2, 150D/3.

1. Analysis on the mechanism of yarn defects caused by the binding of cots, aprons and rollers

Cots, aprons and rollers are the core components of the drafting system of spinning machinery, which control the movement and speed change of fibers in the drafting area. When cots, aprons and rollers are twined with flowers:

(1) Because the cots, aprons and rollers take away part of the fibers in the sliver, the original number of fibers in the sliver is changed, and the sliver becomes uneven in thickness, resulting in yarn defects.

(2) Under the effect of the adhesive tape of the rubber roller, apron and roller, the original structure of the fiber in the yarn strip is damaged, the fiber on the surface of the yarn strip is bent and kinked, the straightness and orientation become poor, the yarn strip is scattered, resulting in the unstable operation and speed change of the fiber, thus increasing the chance of yarn defects.

(3) After the cots, aprons and rollers are wrapped with flowers, the actual effective diameter of cots, aprons and rollers changes due to the change of the thickness of the yarn strip, resulting in the increase of the pressure at the mouth of the crimping pliers, the decrease of the pressure at the other jaws at the same spindle (eye) position, the change of the control ability of each jaw to the fiber, and the relative balance of the traction force and the holding force, thus increasing the pressure The chance of yarn defects.

(4) After the cots, aprons and rollers are twined with flowers, the effective diameter of cots and rollers becomes larger, the effective thickness of aprons is thickened, the surface linear speed changes, the normal drafting multiple changes, resulting in yarn defects.

(5) The original surface characteristics (such as elasticity, friction coefficient, etc.) of cots, aprons and rollers are greatly affected by the fibers. The ability to control the operation and speed change of fibers changes, resulting in yarn defects.

2. The main factors affecting the winding of cots, aprons and rollers

2.1 the influence of fiber surface characteristics on the winding phenomenon of cots, aprons and rollers

Cots, aprons and rollers achieve the drawing function through their friction to fibers and the friction and cohesion between fibers. Therefore, the influence of fiber surface characteristics on the adhesion of cots, aprons and rollers has a significant impact on the phenomenon of cots, aprons and rollers winding.

(1) The effect of fiber maturity on the winding of cots, aprons and rollers

The cotton fiber with moderate maturity has many curls, good bending rigidity and strong fiber cohesion, so the probability of winding cots, aprons and rollers is relatively small; the cotton fiber with poor maturity is relatively soft, bending rigidity is poor, and the fiber cohesion is weak, and it is easy to be damaged to form short pile in the process of opening, carding and drafting, so it is easy to wind cots, aprons and rollers 。

(2) The influence of fiber sugar content on the winding of cots, aprons and rollers

In the production process of cotton fiber with high sugar content, influenced by the hot and humid air in the workshop and the friction with the parts, the sugar is easy to melt and stick, resulting in the phenomenon of winding the rubber roller, the rubber ring and the roller.

(3) The influence of chemical oil agent on the winding phenomenon of cots, aprons and rollers

In the chemical fiber, the fibers with high specific resistance and low moisture regain have a large electrostatic effect in the production process, which is easy to produce the phenomenon of winding cots, aprons and rollers. In order to improve its spinnability, it is generally necessary to add a certain proportion of antistatic agent in the chemical fiber, which reduces the electrostatic effect, but after a period of production, the oil agent in the raw material accumulates in the cots , aprons and rollers change their surface characteristics and are prone to winding. On the other hand, the oil agent accumulates on the process components such as yarn channel and bell mouth, which is easy to scrape the yarn, further increasing the probability of winding cots, aprons and rollers.

(4) The influence of moisture regain of fiber on the winding phenomenon of cots, aprons and rollers

When the moisture regain of raw materials is too high, the friction and adhesion of fiber to roller and cot increases, and the cohesion between fibers is also large. The yarn strip is easy to cause adhesion, which makes the yarn strip surface produce hairy scattered fibers with open head and tail, and easy to cause winding roller and cot. When the moisture regain of the raw material is too small, the cohesion between the fibers is reduced, the yarn is fluffy, and the electrostatic effect is also increased. Moreover, the fibers are relatively brittle and hard, which is easy to produce more short fibers in the production. Therefore, the fibers are easy to adhere to the surface of the cots and aprons, resulting in the phenomenon of winding cots, aprons and rollers.