| TYPE MEDIA |
PROPERTIES |
EFFECT OF ACIDS &
ALKALIS |
TYPICAL APPLICATIONS |
MAX
TEMP |
| ACRYLIC |
A manufactured fiber in which the fiber-forming substance is any long-chain synthetic polymer composed of at least 85 percent by wieght of acrylonitrile units. |
Good to excellent resistance to mineral
acids. Fair to good resistance to weak alkalis.
Moderate resistance to strong cold solutions. |
Lube oils, coolants, cutting oils, fuels,
gas, lubricants, compressed air, and water (non-potable). |
300 F |
BLEACHED
COTTON |
A unicellular, natural fiber
composed of almost pure cellulose.
As taken from plants, the fiber is found
in lengths of 3/8 to 2". The
fiber is then bleached to meet FDA requirements. |
Good resistance to organic acids, poor resistance to mineral acids.
Good resistance to mild alkalies. Poor compatibility to
micro-organisms. |
Meets FDA requirements for potable liquids, vegetable oils, beverages, organic solvents, water, dilute acids, petroleum oils and other. |
300 F |
ECON
POLYPROPYLENE |
Olefin, a manufactured fiber in which the fiber-forming substance
is any long-chain synthetic polymer composed of at least 85 percent by weight of ethylene, propylene or other olefin units. Has industrial finish. |
Excellent resistance to most acids & alkalis with exception of elevated temperature
exposure to chlorosulfonic acid, concentrated to nitric acid & certain oxidizing agents. Excellent resistance to micro-organisms. |
Same chemical compatibility as polyproplyene except for industrial use, non-FDA USA. |
200 F |
FDA
POLYPROPYLENE |
Same as above except meets FDA requirements. |
Same as above. |
Meets FDA requirements for potable liquids, water, animal, vegetable oils, organic acids, alkalies, and many other chemicals. |
200 F |
| FIBERGLASS |
A manufactured fiber in which the fiber-forming substance is glass. |
Excellent compatibility with organic acids, mineral acids, oxidizing agents and organic solvents. Poor compatibility with alkalies. Excellent resistance to micro-organisms. |
Organic acids, organic solvents, petroleum oils, mineral acids, and other high temperature chemicals. |
750 F |
| MODACRYLIC |
Unless rubber or anidex, the fiber-forming substance is long-chain synthetic polymer containing 35 - 85º acrylonitrile units. |
Resistant to most acids. Good resistance to weak alkalis, moderate resistance to strong, cold alkalis. |
Certain acid concetrations, zinc chloride, sodium chloride, and certain nitrates. |
300 F |
| NATURAL COTTON |
Same as cotton except unbleached. |
Same as bleached cotton. |
Same as bleached cotton except does not meet FDA requirements. |
300 F |
| NYLON |
A manufactured fiber in which the fiber-forming substance is a long-chain synthetic polyamide in which less than
85 percent of the amide linkages are attached directly to two aromatic rings. |
Unaffected by most mineral acids, except hot mineral acids, Dissolves with partial decomposition in concentrated solutions of hydrochloric, sulfuric & nitric acids. Soluble in formic acid. Substantially inert in alkalies. |
Special process applications, concetrated alkalies and hydrocarbons. |
350 F |
| POLYESTER |
A manufactured fiber in which the fiber-forming substance is any long-chain synthetic polymer compose of at least 85 percent by weight of an ester of substitued aromatic carboxylic acid, including but not restriced to substituted terephtalate units, and parasubstitued hyrdoxybenzoate units. |
Good resistance to most mineral acids. Dissolves with partial decompostition in concentrated to strong alkalies at room temperature. Disintregrates in strong alkalies at boil. |
Chemical compatibility similar to cotton and polypropylene. Has higher temperature resistance than cotton and polypropylene in most liquids. |
350 F |
| RAYON |
A manufactured fiber composed of regenerated cellulose, as well as manufactured fibers composed of regenerated cellulose in which substituents have replaced not more than 15% of the hydrogens. |
Similar to cotton. Hot dilute or cold concentrated acids disintegrate fiber. Strong Alkaline solutions cause swelling and reduce strength. |
Chemical compatibility similar to cotton. Use primarily for petroleum oils, vegetable oils, mineral oils, water, organic solvents, dilute alkalies. |
300 F |
