Regular Temperature Filter Media
Cotton (woven)
Normal maximum continuous operating temperature is 180°F. Used mostly on shaker type collectors, general applications include: cleaning rooms, atmospheric air cleaning, woodworking applications, cement & rock products, and other general application handling ambient air. Chemical resistance is poor and flammability is high. Cotton filters offer good chemical resistance in dry, ambient conditions and is not recommended where mineral acids and oxidizing agents are present. These filters offer good resistance to both flex and flat abrasion. Cotton has excellent clean-down where static charge tends to hold dust cake on other fibers. Cotton is available with a flame retardant finish.
Cotton Sateen (special woven stitch)
Call for availability information
Polyester
Normal maximum continuous operating temperature is 275°F. Polyester felts offer very good resistance to chemicals, abrasion, and dry heat degradation. They offer excellent
dimensional stability and are the most common type of filter bag used today. Polyester are good for dry heat applications and are superior to other synthetics with the exception of Nomex® (Aramid) and Teflon® in this regard. Polyester is not a good choice for moist heat and subject to hydrolytic degradation under certain circumstances. Polyester offers good resistance to most mineral and organic acids except high concentration of nitric, sulfuric, and carbolic acids. It has good resistance to weak alkalis and moderate resistance to strong alkalis at low temperature. Polyester also has good resistance to most oxidizing agents and excellent to most organic solvents. It is not recommended for some phenolic compounds. Not recommend for high concentration of strong alkalis at high temperatures. Click here for more information…
See also: Duo-Density Polyester (DDPE) / High Efficiency Micro Denier Polyester (SlyHE)
Polyester Sateen (woven)
Call for availability information
High Efficiency Felts (SlyHE, MPS)
Do you need a more efficient filter bag, but don’t want to pay the extreme cost of a PTFE membrane filter? SlyHe felts use micro pore sized fibers to filter fine pollutants. Microfibers are a great solution to fine, uniform, free-flowing dust and fine solids in liquid process slurries. Click here for more information…
Polypropylene
Normal maximum continuous operating temperature is 170°F. Polypropylene felt is used for general applications where chemical and moisture attacks other fibers. Polypropylenes offer high strength, excellent resistance to most acids and alkalis. Smoothness of fibers allow good cake release and resistance to blinding. Moisture absorption is virtually non-existent. This media has very good resistance to both mineral and organic acids and generally good resistance to alkalis with the exception of sodium and potassium hydroxide above 200°F. Good resistance to most reducing agents. Polypropylene also has fair resistance to most organic solvents with the exception of ketones, esters, and chlorinated hydrocarbons.
Nylon (Cerex®)
Normal maximum continuous operating temperature is 250°F. Nylon felt is typically used for highly abrasive dust applications. It has good resistance to alkalis under most conditions, but most mineral oxides cause degradation and partial decomposition. High concentrations and temperatures may cause complete degradation. This media holds up to common organic solvents very well.
Acrylic (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. Not available in all fabric forms and is more costly than polyester or polypropylene. Good temperature resistance.