Stainless Metal Sand for Filament Spinning
The metal sand filled in spin pack for filament and staple fiber spinning should contain two or three layers with different powder particle sizes and quantity. The best combination of particle sizes mainly depends on the type of polymer used in the spinning process, its viscosity and purity, melt temperature and extrusion velocity. The filtration grains are made of stainless metal alloys which are specially developed for hot polymer filtration.
Iron, as basic element, is used to provide good strength in order to avoid brittleness of these particles during filtration under the condition of high pressure and hot environment, therefore decrease the risk of spinnerets capillary clogged. But other alloy elements such as chromium, nickel, silicon and Mn are added necessarily for improving strength and high porosity.
Technical Specification
We can supply any type of particles size combination as requested. The common used mesh size is as the follow.
Size Mesh |
Size Micron |
Density(g/cm3)
|
Porosity % |
10-20 |
2000-850 |
1.5 |
75 |
20-40 |
850-350 |
1.7 |
73 |
40-60 |
350-250 |
1.8 |
71 |
60-80 |
250-180 |
2.0 |
64 |
80-100 |
180-145 |
2.1 |
63 |
100-120 |
145-125 |
2.3 |
60 |
Main composition & its data
Item |
Data |
Item |
Data |
Ni |
8-11% |
Si |
0.8-1.0% |
Cr |
14-18% |
C |
< 0.07% |
Mn |
1.2-2.0% |
Fe |
Balance |
