Metal Sand for Polymer Filtration

Our stainless steel filter powder is produced by water atomization. All of the raw material is strictly selected, and each of its weight percentages is precisely calculated when melted by an induction furnace. After melting, we will analyze the molten metal by arc-spark spectrometer to ensure the alloy composition complies with 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 be atomized into very irregular-shaped 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 the processes 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 a filter medium in the fiber-making process (to replace 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 coating 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 the 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 the polymer passes through the spin pack and will be accumulated in 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 stainless steel powder and silica sand have good resistance to compaction, stainless steel powder is good at steel powder can extend the pack life 2 -3 times that of silica sand, and that makes our powder a better filter media for the spinneret.
6. Precise Size Distribution
   Powder is made by water atomization, which can produce stable quality with precise size distribution.

If other size is required, please contact us. 

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

All the products have been tested before 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.