Today we will specifically talk about the relevant knowledge of melt blown cloth equipment. Many friends said that under the same processing conditions, what are the reasons for the uneven thickness of non-woven fabrics during production? The editor specifically summarized the following points:

1. Uneven blending of low-melting fiber and conventional fiber: Because different fibers have different cohesive forces, in general, low-melting fiber has greater cohesive force than conventional fiber. If low-melting fiber is not dispersed If it is uniform, the part with less content will not be able to form a sufficient network structure in time. The non-woven fabric produced in this way is thinner, and the part with more low-melting fiber content will be thicker.


2. Incomplete melting of low-melting fiber: This situation is mainly due to insufficient temperature. For non-woven fabrics with low basis weight, it is not easy to cause insufficient temperature, but special attention is needed for products with high basis weight and high thickness. Up. Because the non-woven fabric on the side of the image has enough heat, it is usually thicker, and the non-woven fabric in the middle part is easily insufficient to form a thinner non-woven fabric, which is one of the reasons.

3. High shrinkage rate of fiber: whether it is conventional fiber or low melting point fiber, if the hot air shrinkage rate of the fiber is too high, then there will be uneven thickness during the production of non-woven fabric.


What causes static electricity during non-woven fabric production?

1. External factors may be due to the dry weather and insufficient humidity.

2. When there is no antistatic agent on the fiber, because the moisture regain of polyester cotton is 0.3%, the lack of antistatic agent results in static electricity easily generated during the production of non-woven fabrics.

3. The oil content of the fiber is low, and the relatively small content of electrostatic agent will also generate static electricity.

4. The method of preventing static electricity is in addition to humidification in the production workshop, it is also a very important task to effectively eliminate oil-free cotton during the feeding stage.

What are the reasons for the uneven softness and hardness of non-woven fabrics under the same processing conditions?

1. Due to the uneven blending of low-melting fiber and conventional fiber, the part with higher low-melting point is harder, on the contrary, the part with lower-melting point is softer.

2. In addition, incomplete melting of low-melting fiber can easily lead to softer non-woven fabrics.

3. High fiber shrinkage will also cause uneven softness and hardness of non-woven fabrics.