Polypropylene
(20 to 30 CFM)

Characteristics
Spun yarns, light weight, good tensile strength.  Smooth surface.   Good filtration characteristics.  8 oz. weight

Usage
The universal anode bag material for all acid, cyanide, and air agitated solutions.  Maximum temperature is 180º F.

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Napped Polypro (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 stregth of synthetics.

Usage
Used in all acid baths which are highly air agitated and where large anode area exists.  The superior fabric for particle retention.

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14 oz. Polypropylene
(8 to 15 CFM)

Characteristics
Spun yarns, heavy weight, excellent tensile strength.  Good filtration characteristics and permeability.  Maximum temperature 180º F.
Usage
Heavy Material for all acid, cyanide and air agitated solutions.  Heavier material construction than our standard polypropylene.

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Cotton

Characteristics
Sateen Weave.  6.5 oz. weight.  25 CFM rating.

Usage
Barrel nickel, alkaline copper, and nickel with cathode agitation.

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Synel (Open weave polypro)
50 to 70 CFM

Characteristics
High acid resistance and excellent wet strength.  Good solution transfer from anode.  7 oz. weight.  Max temperature 180º F.

Usage
All fluoborate baths, acid tin, air agitated baths.  More open weave construction than standard polypropylene.

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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.

Usage
Excellent alternative to our regular cotton where a higher degree of suspended solids requires a heavier weight material.

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Mono-Filament Polypro
(Various micron ratings)

Characteristics
100% Polypropylene.  Micron and CFM rated.  Basket (std.), plain, twill, and satin weaves are available.  5.4 to 6.2 oz. weight.  Extremely strong with very smooth surface.  Superior cleaning characteristics.

Usage
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.

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Nylon
(Various micron ratings available)

Characteristics
Good alkaline resistance.  Variety of micron sizes.  Maximum temperature 225º F.

Usage
Excellent mildew and abrasion resistance.  Fine and coarse materials.

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Polypropylene Microfelt
(1 to 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 180º F.

Usage
For electroless copper & nickel filtration.  Also special applications such as air purification.  Often used in ring, flange, and snap ring filter bags.

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Cotton Duck

Characteristics
A heavier weight natural cotton filter fabric.  10 oz. weight.

Usage
Barrel nickel, alkaline copper, and nickel with cathode agitation.

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3 x 1 Twill Polypropylene
(20 to 30 CFM)

Characteristics
Lint free woven polypropylene.  Very smooth surface.  Good filtration.

Usage
Premium anode bag material for all acid, cyanide, and air agitated solutions.   Maximum temperature 180º F.

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Melt Blown Polypropylene
(10 to 150 CFM)

Characteristics
Exceptional particle retention efficiency (>90%).  Very fine fibers, multi layered, for high loft and good flow rates.  Often used in water treatment.  Can be combined in multi-layer bags for extreme filtration.

Usage
Water and waste treatment, carbon removal, fine filtration of acids, bases, and solvents.

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Polyester Felt
(Glazed one side shown)

Characteristics
Max temperature 300º F.  10 to 18 oz. weights.  1 to 100 micron ratings.  Alternative to polypro when applicable.

Usage
Good resistance to most mineral acids and weak alkalis.  Excellent resistance to bleaches.  Not to be used with concentrated sulfuric acid.

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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

Usage
Resistant to most acids, bases, and solvents.  Mildew resistant.  Can be used as a cover fabric on multi-layer bags.

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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.

Usage
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.

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Many people ask for Dynel fabric for filter bags

"Dynel" is a a trade marked fiber made by Union Carbide that was used in making fire-resistant, insect-resistant, easily dyed fabric used in textiles.  This fabric has not been produced in many years.

"Dynel Cloth" is a woven fabric similar to fiberglass.  It is used as a laminate fabric, usually in museum quality restorations of wooden boats and in general for abrasion resistant patches on boats and paddles.

We at Baker Bags have a wide range of fabrics available.  If you are looking for Dynel filter bags please contact us and we will advise a suitable substitute fabric for Dynel in your particular application.

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