Liquid and Air Filtration Fabrics.

Liquid and Air Filtration
Lumite has a long and exemplary history servicing the filtration industry. Our quality standards are rigorous, as our products are most often used in critical applications where fabric performance is essential.

We offer analytical capabilities for our customers including:

Fiber composition
Weave type
Tensile strength
Air flow resistance
Pore size
Come to us with a specification or representative example of your filtration media requirements. We will do our best to evaluate and recommend a solution that meets your needs.

Industries using LUMITE fabrics:

Chemical processing
Mining
Sugar refining
 

Water filtration
Waste water treatment
Food and beverage (FDA approved fabrics)
Pool and spa
Pulp and paper
 

Fibers and Yarns
The backbone of the filter
The four main types of fibers and yarns are:

Monofilament
Single continuous lengths of extruded synthetic fiber.

Multifilament
Produced by bundling continuous strands of extruded synthetic filaments that may or may not be twisted to form a single yarn.

Spun Yarns
Made of short strands of fiber that are twisted together to form a single yarn.

Fibrillated Tape
A slit film fiber cut into a pattern of fibrils that may or may not have been twisted.

Yarn Properties
Our three most requested yarns are polypropylene, nylon and polyester. Each fiber has its own distinct advantages:

Polypropylene-

Excellent resistance to most mineral acids and alkalis
Very good resistance to bleach and solvents
Very good resistance to aging, indirect sunlight and abrasion
Not weakened by mildew

Nylon

Excellent tensile strength
Excellent resistance to abrasion
Very good resistance to alkalis
Very good resistance to solvents

Polyester

Provides excellent tensile strength
High melting point (482 degrees-544 degrees F, depending on type)
Very good resistance to weak alkalis and most mineral acids
Excellent resistance to bleaches and oxidizing agents
Excellent resistance to aging and abrasion
Not weakened by mildew

Other yarns include Polyethylene and Kynar

Weave types:

Plain
This configuration is the most stable of all weaves. Its construction-one warp end over one pick- allows greater control over particle retention and liquid flow. Sheds cake less readily than twill or satin weaves.

Satin
Because of their unbalanced construction-multiple ends and picks crossing between each interlacing point- satin weaves are incredibly smooth. They offer superior cake release and resistance to binding, yet are generally less stable than twill or plain weaves.

Twill
These weaves do not interlock on every end and pick, resulting in a smooth "face” side that allows for easier cake release. Variations of the twill weave include chain, herringbone and crowfoot.

Other weaves include

Oxford
3-Dimensional
Tubular

Selecting the right fabric
Fabric choice is critical and is based on the filtration application. Whether the objective is to refine a product, recover it, or clarify a filtrate, the fabric must meet some or all of the following objectives.

Ability of the fabric to prevent the passage of solid material
Ability to allow even flow of material
Ability to resist plugging
Ease of filter cake removal

The environment in which the filter is used is also to be considered

Resistance to heat (wet or dry)
Resistance to chemicals
Resistance to friction
Physical properties (strength, elongation and specific gravity)