Main Performance Indexes Of Mesh Belt For Spinning And Melting Line

Mesh belt is the collection device of fiber in spinning and melting production line. It is also the carrier of fiber net. After drafting, the fiber falls into the mesh belt of the spinning drafting device with air flow at high speed, and is paved into a continuous uniform mesh. The mesh belt is the working face of the netting machine, and its performance has a great influence on the quality of the nonwoven fabric.

The main performance indicators of the mesh belt are as follows:

One

Width of mesh belt

The width of the mesh belt is determined by the nominal width of the product, and the nominal width of the product is the main basis for determining the width of the net. The width of the mesh belt must be wider than the width of the net.

The effective width of the net belt is generally larger than the width of the inner cavity of the diffuser. The total width of the mesh belt is the sum of the effective width of the net belt and the width of the sides. The width of the net belt needs several factors such as the comprehensive diffusion duct, the suction duct and the effective width, so as to ensure the stability and evenness of the 100-150mm mesh.

Two

Mesh permeability (volume)

Air permeability (also known as air permeability) is the main performance index of the mesh belt. The main factor determining the permeability of the mesh belt is the braiding method. Because the diameter of the fiber produced by the spinning system is very small, if the permeability of the mesh belt is too large, the fiber will easily be sucked into the mesh belt structure, resulting in the separation of the mesh belt and the blockage of the mesh belt. Therefore, in the production line, we should try to choose the mesh belt with smaller air permeability.

The air permeability of the mesh belt used in the production line is related to the spinning process used. When the closed paving process is adopted, the mesh belt with small air permeability can be selected because of the small gas flow needed to be processed. When using the open paving technology, the total gas flow is larger because not only the cooling and draft air flow is needed, but also the ambient air flow is processed. Therefore, the air permeability of the mesh belt selected is larger than that of the closed net laying process. In addition, the mesh size of the same process type and different manufacturer's mesh belt is different.

Due to the large number of airflow passing through the net belt, after a long period of operation, the monomer, fiber and dust will block the air passage of the mesh belt, which will change the air permeability and affect the uniformity of the product. Therefore, we should regularly clean the net belt to keep it in good condition.

Three

Antistatic property of mesh belt

The good anti-static property of the mesh belt is an important condition for the high-speed production line to operate normally, and is also the technical basis for producing small quantitative thin products. Because of the high-speed movement and friction between fibers in drafting and laying process, a lot of static electricity will inevitably be generated. Static electricity will not only affect the quality of laying nets, but also affect the separation of fiber mesh and mesh belt. Commonly used polyester (PET) monofilament is used as a material for weaving mesh belts, and requires antistatic properties, such as polyester (PET) monofilament containing carbon or other conductive materials.

Four

Peeling property of mesh belt

The peeling property is an important performance property of the mesh belt. It refers to the difficulty of forming the mesh when leaving the net belt. The mesh belt is used as the carrier of the fiber net. It requires that the fiber mesh can be attached to the surface of the mesh, and it will not drift in the transportation process, and it will also be easier to separate from the mesh belt.

The mesh belt has good peeling performance, and the mesh will easily separate from the mesh belt into the hot rolling mill or enter the winding machine, and will not increase the transmission tension of the mesh. The mesh belt with poor stripped performance is not easy to separate from the mesh belt, and it will follow the net belt down the circumference of the backward roll until it is stripped from the mesh belt under the action of larger mesh tension. This kind of mesh belt affects the quality of the mesh and the width of the mesh. It is easy to produce "thin net" defects. The width of the product is narrowed obviously.

The peeling performance of the mesh belt is mainly related to the weaving method, the air permeability and the antistatic performance of the mesh belt, and the quality status of the web belt has been used as the main reason leading to the poor peeling performance of the mesh belt. The greater the permeability of the mesh belt, the lower the antistatic performance and the shaggy working face, the worse the peeling performance of the mesh belt will be.