Spunbond nonwoven production process
The production process of spunbonded non-woven fabrics is also called “S” cloth because its first English letter is “S”. Spunbond nonwoven fabric
The production system is also referred to as the “S” system or “SB” system for short. The production line that produces nonwovens by spunbond process is called the spunbonded nonwoven production line. In order to improve the performance of the production line and the quality of the product, a production line can be equipped with multiple spunbond spinning systems, which can be combined into a SS or SSS spunbond nonwoven production line.
Non-woven machinery
There are many production processes for spunbond nonwovens, but the main processes are basically the same. The basic production process of its spunbond nonwoven fabric is as follows:
Preparation of raw and auxiliary materials—conveying—metering and mixing—extrusion and melting—melt filtration—metering—spinning—cooling—drafting—netting—fabrication—finishing—online inspection—slitting—winding—products
The equipment and production process of the spunbond nonwoven production line are as follows:
Non-woven machinery
The basic production flow chart of spunbond nonwovens is as follows:
Non-woven machinery
1. Preparation of raw and auxiliary materials
Mainly refers to the preparation and pretreatment of raw materials for production. PP raw materials can be directly put into the production system without pretreatment
All other raw materials, such as PET, PA, PILA, etc., must be dried before they can be put into use.
2. Conveying
The conveying process includes sending the “wet slices” (raw materials) from the storage location to the drying system for processing and the drying of the
“Dry slices” are transported to the two processes used in the production line.
3. Measuring and mixing process
The function of this process is to mix various raw and auxiliary materials uniformly with each other in the proportion required by the process, then enter the production system and transport
To the screw extruder processing.
4. Extrusion and melting process
The function of this step is to process the solid raw material into a viscous fluid melt.
5. Melt filtration device
The function of the device is to remove impurities in the melt and protect the safety of the system.
6. Metering
The function of metering is to provide a melt with stable pressure and uniform flow for the spinning device.
7. Spinning process
This process turns the high-temperature melt into a trickle of melt.
8. Cooling device
The function of this device is to cool and lower the temperature of the high-temperature melt stream, making it a fiber with stable performance.
9. Lian Zhong
Drafting can increase the orientation and crystallinity of the molecular arrangement in the fiber, and improve the mechanical and physical properties of the fiber.
10. Laying process
The function of this process is to spread out the messy fibers and become a uniform and continuous fiber web.
11. Fabrication process
This process is to use a certain method to consolidate and set the scattered fiber web into a non-woven fabric with practical value.
12. Finishing
Finishing can give products specific functions. Generally, drying equipment is also arranged downstream of the finishing equipment to remove
Excess moisture in the product, this part of equipment is not a necessary process device.
13. Online detection device
The device can dynamically detect the quality of the product when the production line is in operation, and the online detection device is not
The basic configuration of the production line.
14. Rolling process
This process is to collect the non-woven fabrics in rolls and become products that are delivered to the market or processed in the next process.
15, slitting
The purpose of slitting is to process the full-width, continuous non-woven products produced into the specifications required by the market (roll length
And width) products. In low-speed, small-scale production lines, the slitting function can be directly completed on the winding machine.
So far, the production technology of spunbond nonwovens has been developed rapidly, and a variety of more mature spunbonded nonwovens have been formed.
Fabric production process. For example, the operating speed of the production line has grown from tens of meters per minute to 100m/min in the early days to 300 at present.
800m/min, the maximum speed of the spunbond production line that has been put into operation in my country has reached 600m/min; the drafting speed of the fiber has been changed from
Early 1000~2000m/min, developed to the current 3000~5000m/min, up to 800m/min; single fiber line density
The degree has also developed from greater than 5.5 dtex (5 denier) in the early days to less than 1.1 dtex (1 and), and the non-uniformity of bicomponent fibers has been developed.
Weaving cloth. But in terms of working principle, except for the differences in spinning, cooling, drafting and web-laying methods, the other production process principles and equipment are basically the same.
Post time: Dec-17-2021