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High-Speed Polymer Melt Filter for Spinning - Quality Solutions from China Suppliers and Factory
In the production of spunbonded nonwovens, in order to ensure the smooth progress of the spinning process and reduce the occurrence of broken filaments and dripping, two sets of filtering devices are generally installed.
First Filter (Rough Filter)
Installation Location: Installed between the screw extruder and the metering pump.
Main Function: Filters out larger impurities to extend the use time of the second filter device and protect the metering pump and spinning pump.
Additional Benefit: Increases the back pressure of the extruder, contributing to the exhaust and plasticization of the material during compression.
Second Filter (Fine Filter)
Installation Location: Installed inside the spinning assembly.
Main Function: Filters fine impurities, crystal points, etc., to prevent clogging of the spinneret.
Additional Benefit: Ensures the smooth progress of spinning and improves the overall quality of the fiber.
The shape of the filter screen depends on the shape and size of the spinneret, and is generally a multilayer rectangular filter.
Frequently Asked Questions
1. Why are two sets of filtering devices used in spunbonded nonwovens production?
They are installed to ensure a smooth spinning process and to reduce occurrences of broken filaments and dripping.
2. Where is the first (rough) filter installed and what does it do?
It is installed between the screw extruder and the metering pump. It filters out larger impurities to protect the pumps and extend the lifespan of the second filter.
3. How does the rough filter assist the extruder?
It increases the back pressure of the extruder, which helps with the exhaust and plasticization of the material during compression.
4. What is the function of the second (fine) filter?
Installed in the spinning assembly, it filters fine impurities and crystal points to prevent spinneret clogging, ensure smooth spinning, and improve fiber quality.
5. What determines the shape of the filter screen?
The shape and size of the spinneret determine the filter screen's shape, which is generally a multilayer rectangular filter.