Spin Pack Filter Disc in 304 Stainless Steel (AISI 304 (1.4301)) is used for filtering polymer just before the spinneret in synthetic fiber spin packs with small multi-layer rimmed mesh discs, catching gels that would break filaments. The alloy gives good general corrosion resistance in atmosphere and fresh water and is essentially non-magnetic (annealed), with a practical service limit of approx. +450 °C continuous.
Alloy Properties
| Grade designation | AISI 304 (1.4301) |
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| Magnetic response | Essentially non-magnetic (annealed) |
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| Service temperature | approx. +450 °C continuous |
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| Corrosion characteristic | Good general corrosion resistance in atmosphere and fresh water |
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Specifications of Spin Pack Filter Disc Available in 304 Stainless Steel
| Size | Diameter (mm) | Layers | Micron rating (u00b5m) | Edge | Fiber |
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| u00d860 | 60 | 3 | 20 | Aluminum rim | PET / PA staple |
| u00d880 | 80 | 4 | 15 | Stainless rim | PET FDY |
| u00d8100 annular | 100 | 5 | 10 | Welded inner + outer rim | PA6 / PP |
Where 304 Stainless Steel Spin Pack Filter Disc Is Used
- Polyester (PET) fiber: FDY, POY and staple spin packs.
- Nylon & polypropylene: BCF carpet yarn and nonwoven spin packs.
- Technical fibers: aramid, spandex and high-tenacity yarn.
- Meltblown nonwovens: die filters.
Ordering Spin Pack Filter Disc in 304 Stainless Steel
- Shape: Round or annular discs to fit the pack body.
- Layer build: Graded mesh layers, sometimes with sintered or fiber-felt layers.
- Rim: Aluminum, stainless or welded double rims for a reliable seal.
Mistakes to Avoid with Spin Pack Filter Disc
- Re-using discs between pack changes, which releases trapped gels into the filaments.
- Putting the fine layer on the upstream face, where it blinds within hours.
