How to increase the hardness of non-woven fabrics

Diving, will it suddenly appear @ Administrator 3 Why is the temperature of the rolling mill high and the cloth still soft?

20 19/8/25 15: 16: 17

Small weighbridge for reactive nonwovens+09/8/2515:16:17.

How many years has the rolling mill been used?

Small weighbridge for reactive nonwovens 2019/8/2515:16: 43

I have one here, too No matter how high the temperature is, the cloth is not hard.

20 19/8/25 15: 19:04

Diving, will 2019/8/2515:19: 04 suddenly appear?

7.8 years, I don't know why. See if anyone can see the doorway.

Small weighbridge for reactive nonwovens 2019/8/2515: 20: 53

I have changed the oil in the rolling mill here, dismantled the oil furnace, checked all the oil circuits and washed them, but they are not hard. Now we can only make them thin or not hard.

20 19/8/25 15:23:3 1

Diving, will 2019/8/2515: 23: 31suddenly appear?

Well, something like that. We also carved it again. Yeah, yeah, it's done, but it's not difficult.

20 19/8/25 16:06:03

I'm just silent and not stupid. 20 19/8/25 16:06:03

The rolling point is worn, and the idea is too shallow

Diving spunbonding method

@ Admin 3 I don't understand why the shallower the dot pattern of the roller, the softer the cloth will be. I always thought that the deeper the dots, the softer the fabric.

8:50:33

Administrator Administrator 3 20 19/8/26 8:50:33

In fact, there is a very important parameter of rolling mill called hot melt ratio, which is probably the percentage of rolling mill pattern area to the total rolling mill area.

The larger the pattern area, the higher the pressure point height and the greater the melting point, that is, the harder it is. However, the height of the pressing point should not be too large, because the mechanical material should correspond to the mechanical strength, and improper pressing will lead to rapid damage.

PP spunbonded nonwovens are smooth rolls and patterned rolls. Cloth surface bonding is point bonding, and the hand feeling is not only related to the temperature of single roll and rolling mill pressure, but also related to the pattern and temperature of patterned roll of rolling mill. Then we will know by analyzing the pattern.

To give two extreme examples, a master used two smooth rollers to make hot-rolled cloth, and the surface was glued and hard. Perforated nonwovens feel good, but nonwovens that feel too soft can't make good nonwovens.

Especially for thick cloth, the nip area of the rolling mill is large, the melting strengthening area is larger and deeper, and the heat can be better transferred to the cloth surface. This is under the same process conditions, and it is not absolute if different processes are compared.

In addition to making a fuss about mill pattern, temperature and pressure, process wind and spinneret, the melting of raw materials or adding inorganic additives such as calcium carbonate will also change the handle, and the quantity and type of recycled materials are also important factors.

Whether the oil circuit and the oil circuit of the rolling mill mentioned by a master above are blocked or not should be unblocked, and the reduction of thermal conductivity is also an important link.

If the fabric used to be hard, but now it is soft, that is, whether the process has changed or whether the rolling point of the rolling mill is highly worn and getting lower and lower. The area of rolling mill nip is carved into different shapes, different areas and distances, which is a direction of differentiated products and different applications.