Metal Sand for Polymer Filtration

Our stainless steel filter powder is produced by water atomization. All of raw material is strictly selected and each of its weight percentage is precisely calculated when melted by induction furnace. After melting, we will analyze the molten metal by arc-spark spectrometer to ensure the alloy composition has been complied to the specification. When pouring the metal out from the furnace into the tundish, the temperature of the metal is controlled within ±10℃. Then the metal will go through a well-designed atomizing die, and atomized into very irregular-shape powder with high pressure RO water in a N2 environment. After that, the powder will be collected, dewatered, dried, sieved, mixed, inspected and then packed. Each of process is well operated and monitored, so our users are always using our high quality and stable stainless steel filter powder. 

In order to increase the production efficiency and better fiber quality, chemical fiber mills nowadays are using irregular shaped stainless steel powder as filter medium in the fiber making process (to replace with silica sand and aluminum oxide). 

1. Inert to Polymers
   High-chromium alloy stainless steel powder is inert to all polymers due to the protective chromium oxide coated on the particle surface.
2. High Porosity Rate
   The porosity rate of our powder is as high as 70% - 80%, which can easily capture more foreign bodies, decrease the pressure rising rate, and increase the pack life of spinneret.
3. High Shearing Ability
   Our stainless steel powder has very sharp, strong, and irregular edges, which is very good for filtering, shearing and stripping fine micro gels from melt polymer. As Silica sand doesn’t come with such edges, fiber produced with our powder is stronger, and better in quality.
4. High Thermal Conductivity
   Lots of heat will be generated when polymer is passing through the spin pack and will be accumulated at the area. As stainless steel powder has better heat conductivity (than silica sand for 4 times more), it can effectively remove the heat for better temperature control and it is a perfect solution for high-speed spinning.
5. Resistance to Compaction
   Although both of stainless steel powder and silica sand have good resistance to compaction, stainless steel powder is good at steel powder can extend the pack life for 2 -3 times than silica sand, and that makes our powder the better filter media for the spinneret.
6. Precise Size Distribution
   Powder is made by water atomization, which can produces stable quality with precise size distribution.

If other size is required, please contact us. 

These are our main advanced production process to make the high quanlity products for you.  Our products are all made in Taiwan from the beginning to the very end. 

All the products have been tested before the delivery.  We are 100% confident about our product quality when it is delivered to the customer. 

Carefully packing to ensure that our products are all in the best condition and quality.