Antistatic reinforcements for filters, with BAFA steel thread scrims

We supply manufacturers of filters with antistatic laid scrims.

Our BAFA^®-laid scrim made of stainless steel fibre does not only add antistatic properties to your filter. With scrims your product also gets a structural reinforcement (increase of tear strength).

Antistatic properties

Electrostatic charges, which are caused, for example, by the friction of nonwovens against surfaces or particles in an air flow, must be dissipated by earthing for certain types of use (for example, within potentially explosive atmospheres).

As an integrated metal scrim you can connect a BAFA^®-laid scrim for protective earthing / functional earthing with an earthing lug or an earthing bolt.

This makes them suitable for use in ventilation systems, especially in potentially explosive atmospheres, for gas explosion protection in accordance with ATEX Directive II G / II A – II C (X), in Zones 1 and 2 according to DIN EN 1127-1 and for solvents in explosion groups II A to II C (X).

In contrast to antistatic additives, scrims are at least as durable as the fleece to which they are bonded.

Tear resistance and minimum weight for filters

Due to the combination of tensile forces and safety requirements, filters must be resistant to tearing – at minimum weight. Particularly with basis weights of less than 100 g ramm per square meter, any kind of reinforcement must also be lightweight.

Engineers who look for such reinforcements for their designs should include scrims in their considerations.

Scrims are suitable for reinforcing all product categories of filter fabrics, such as:

• Air Filter
• Liquid filter
• Pocket filter
• Pleated filters
• Gravity belt filter
• Pressure belt filter
• Vacuum belt filter
• Filter Drainage Covers
• Filter laminates
• Filter mats

What are laid scrims?

Laid scrims are lightweight structures made of yarns / technical textiles that differ significantly from ordinary fabrics:

• Threads run diagonally / multi-axial in 6 to 10 directions. Thus they absorb working forces significantly more effective.
• The threads don’t lie loosely upon and underneath each other. With a „binder“ they are glued permanently at their contact points.
• They are more flexible and simultaneously more stable.
• Their higher structural tearing strength allows wider meshes and a significantly lower weight per unit area.
• You can combine various options of materials, taking benefit of their specific characteristics.
• The threads of the scrim can be equipped with a multitude of impregnations to support the specific purposes of the final product.

For more information about BAFA^®-laid scrims click here.

Threaded scrims combine exactly the properties that make high-quality or technically sophisticated nonwoven products:

• Extremely light
• Depending on the material extremely tear-resistant / flexible, electrically conductive
• Moisture resistant
• Temperature resistant up to the upper limit of filters and fleeces
• Dimensionally stabilizing
• Durable
• Cost-effective

Added value through design and function

In most cases, scrims are processed invisibly as an intermediate layer in sandwich construction. However, this does not yet exploit its full potential. In addition to their functionality, laid scrims offer you another valuable option:

Emphasize and visualize the added value of your high-tech products!

Threaded scrims offer you interesting design options under transparent surfaces or as top layer. Depending on the thickness, density and angle of the threads, you can make your products look even more filigree and/or stable.

Processing, mechanical manufacturing processes

BAFATEX supplies laid scrims wound on rolls. They are designed for mechanical production processes and a high processing speed. BAFA^®-laid scrims are characterised by good cutting and punching properties. This makes them suitable both for punching production lines and for manual use by craftsmen and private customers.

Individually customizable

You can reinforce your products with several variables and adapt them to your requirements:

• Material, combination of materials and their properties (e.g. soft, hard, heat sealable, waterproof, flame retardant)
• Impregnation / adhesive material
• Width of the mesh
• Breaking load (2,2 – 448 N)
• Tenacity (13 – 355 cN/tex)
• Elongation at break (1,7 – 23% compared to e.g. 80-150% for unreinforced PVC adhesive tape, whereby a scrim has a definable elasticity not only due to its material, but also due to its structure / angle)
• Angles (and hence force transmission) of crossing threads
• Colors
• Impregnators (Prepregs)

Material options

Depending in which characteristics your product shall have we offer you laid scrims of these materials:

• Natural fibres: Jute, cotton and flax (more information)
• Man-made fibres (more information)

Your supplier with know-how and consulting

Based on our experience of decades and our technical expertise we would be pleased to consult you about the range of characteristics and processing technologies of our scrims.

As a matter of course we are certified by DIN ISO 9002 (since 1994) to assure a permanent and high quality of our products.