Anode and Filter Bag Fabric Selection at CDI in Buffalo, NY
Polypropylene (20 to 30 CFM)
Characteristics:
Spun yarns, light weight, good tensile strength. Smooth surface. Good filtration characteristics. 8 oz. weight
Use:
The universal anode bag material for all acid, cyanide, and air agitated solutions. Maximum temperature is 180° F
Napped Polypropylene (Poly Nap) - (10 to 20 CFM)
Characteristics:
Heavy 13 Oz. material with good napping on the inside surface. Combines the filtration qualities of cotton and the wet strength of synthetics.
Use:
Used in all acid baths which are highly air agitated and where large anode area exists. The superior fabric for particle retention.
14 Ounce Polypropylene - (8 to 15 CFM)
Characteristics:
Spun yarns, heavy weight, excellent tensile strength. Good filtration characteristics and permeability. Maximum temperature 180° F.
Use:
Heavy Material for all acid, cyanide and air agitated solutions. Heavier material construction than our standard polypropylene.
Cotton
Characteristics:
Sateen Weave. 6.5 oz. weight. 25 CFM rating.
Use:
Barrel nickel, alkaline copper, and nickel with cathode agitation.
Synel (Open Weave Polypropylene)
Characteristics:
High acid resistance and excellent wet strength. Good solution transfer from anode. 7 oz. weight. Max temperature 180° F.
Use:
All fluoborate baths, acid tin, air agitated baths. More open weave construction than standard polypropylene.
Canton Flannel
Characteristics:
Heavy weight cotton with napping on the inside surface. Combines the filtration qualities of cotton with the depth retention of napping. 9 oz. weight.
Use:
Excellent alternative to our regular cotton where a higher degree of suspended solids requires a heavier weight material.
Polypropylene Monofilament (Various micron ratings)
Characteristics:
100% Polypropylene. Micron and CFM rated. Basket (standard), plain, twill, and satin weaves are available. 5.4 to 6.2 oz. weight. Extremely strong with very smooth surface. Superior cleaning characteristics.
Use:
Excellent resistance to most acids and alkalis except oxidizing agents. Great as reusable filter media, carbon bags, or as added reinforcement for weaker fabrics when the pressure is high.
Nylon (Various micron ratings)
Characteristics:
Good alkaline resistance. Variety of micron sizes. Maximum temperature 225° F.
Use:
Excellent mildew and abrasion resistance. Fine and coarse materials.
Polypropylene Microfelt (1 - 200 micron)
Characteristics:
Choice of synthetic media available from 1 to 200 micron. Some fabrics available with glaze or singe on one side. Maximum temperature 180° F.
Use:
For electroless copper & nickel filtration. Also special applications such as air purification. Often used in ring, flange, and snap ring filter bags.
Cotton Duck
Characteristics:
A heavier weight natural cotton filter fabric. 10 oz. weight.
Use:
Barrel nickel, alkaline copper, and nickel with cathode agitation.
3x1 Twill Polypropylene (20 - 30 CFM)
Characteristics:
Lint free woven polypropylene. Very smooth surface. Good filtration.
Use:
Premium anode bag material for all acid, cyanide, and air agitated solutions. Maximum temperature 180° F.
Polyester Felt
Characteristics:
Max temperature 300° F. 10 to 18 oz. weights. 1 to 100 micron ratings. Alternative to polypro when applicable.
Use:
Good resistance to most mineral acids and weak alkalis. Excellent resistance to bleaches. Not to be used with concentrated sulfuric acid.
Spun Bonded Polypropylene (220 CFM)
Characteristics:
Bonded fibers. Lint free with excellent cake release and abrasion resistance. High strength to weight ratio. 1.5 oz. weight.
Use:
Resistant to most acids, bases, and solvents. Mildew resistant. Can be used as a cover fabric on multi-layer bags.
Spun Bonded Polyester (195 CFM)
Characteristics:
Bonded fibers. Lint free with excellent cake release and abrasion resistance. High strength to weight ratio. Higher temperature rating than polypropylene. 4 oz. weight.
Use:
Very good bleach resistance. Mildew resistant. Used in waste treatment applications. Not for use with sulfuric acid. Can be used as a cover fabric on multi-layer filter bags.
The information supplied above is offered as a service to our customers, and does not relieve the customer from their responsibility to determine the suitability of a particular chemical or piece of equipment to their specific purpose. Actual product specifications may vary slightly. Please contact CDI for information prior to purchase.