In industrial bag filters (fabric filters for dust collection), filter media are typically textiles or felts. Which of the following is never used as the filter fabric itself?

Introduction / Context:
Baghouse filters remove particulates from gas streams using fabric bags. The choice of fabric affects temperature resistance, chemical compatibility, and collection efficiency.

Given Data / Assumptions:

• Bag “fabric” refers to the actual filtering medium.
• Common fabrics include cotton, polyester, nylon, acrylic, aramid, PPS, etc.

Concept / Approach:
Bag filters require flexible, permeable fabrics. Metallic wire meshes are used as internal cages (support structures) but not as the fabric itself in a conventional baghouse. Textile felts and woven fabrics provide the dust cake support and filtration layer.

Step-by-Step Solution:
Differentiate between filter media (fabric) and cage/support.Identify polymers/natural fibres as valid media.Exclude metallic wire woven mesh as the fabric.

Verification / Alternative check:
Baghouse supplier catalogs list textile media; metal elements show up only as cages or sintered-metal cartridges (a different technology than cloth bags).

Why Other Options Are Wrong:
Polyester/cotton/nylon/acrylic: all are used for bag fabrics depending on conditions.

Common Pitfalls:
Confusing sintered-metal cartridge filters with fabric baghouses.

Final Answer:
Metallic wire woven mesh