Acrylic (AC)

The information provided on this website is intended as a guide for filter bag applications. SLY, LLC. makes no guarantee about the performance or results you can expect from the application of this information unless provided in writing from our staff.

Acrylic Felt (Homopolymer Acrylic Felt) – Normal maximum continuous operating temperature is 275°F. General applications include: dryers, electric furnace, aluminum reduction and primary or secondary smelting. The chemical resistance is satisfactory to most mineral and organic acids. Superior to polyamides and polyesters in this regards. Acrylic resistance to alkalis is inferior to most fibers except natural protein fibers such as silk and wool. Acrylic has fair resistance to most oxidizing agents and is superior to polyamides and protein fibers in this respect. It has excellent resistance to most common organic solvents. Overall, acrylic has good acid resistance, high resistance to hydrolysis and good temperature resistance. Acrylic is more costly than polyester and polypropylene.

Fiber Filter Properties (PDF)
Fiber Filter Chemical Compatibility Chart (PDF)

  • Available Finishes for Acrylic: Plain (PL); Singed (SI); Glazed (GL); ST-01 (Oleophobic); ST-04 (Code 9); PTFE membrane (XP); ST-08 (double dip ST-01); ST-09 ; ST-10; Fire Retardant (FR); SlyCharge (EX); ST-12 (SS fibers); Epitropic (EP); SlyHE (High efficiency). See detail information on finishes here.
  • Available Weights for Acrylic: 16 oz./yd2, 18 oz./yd2

Acrylic Felt Common Finishes:

Singed (SIAC) – The felt is singed on the dust cake side for improved cake release. The process involves exposing the surface fibers to an open flame that melts back the loose fiber ends to which dust particles could adhere.

Glazed (GLAC) – This process involves running the felt through two heated rollers to melt back the loose fiber ends improving the cake release. The process can also compress the felt to smooth the surface, further improving the cake release.

SlyTech-01 (ST-01) – Oleophobic -water and oil repellent finish. SlyTech-01 is a complete PTFE bath which provides an excellent cake release finish to each fiber. This finish is cheaper and more durable than a membrane that can be easily scratched.