Innovation : emphasis ATC’s First HV technical fabric

ATC is at the heart of innovation and fabric development in order to comply with the various issues faced by our clients.
This is the story of the First HV that was developed in 2015 to meet air diffusion and dispersion of pollutant zones in a wastewater treatment plant in Archères. Nowadays, most part of our fabric duct are made of this specific fabric and we wished to present it to you.

What are its features ?

This is a 220g/m² M1 Polyester with a Ripstop weave with key assets: machine-washable, light (regarding the structure of the building) and resistant to tearing and traction. Thus, it can meet many needs in all kind of applications.
This fabric is cut in our factory in Lyon with a laser machine which guarantees no fraying from the perforations and a product resistance over many years. Besides, in our laundry, we control, wash and repair ducts that have been produced 15 years ago.
Extra feature: this textile can go through the sublimation process which allows you to personalize it according to your wishes or those of your customers.

What is the strength of this fabric?

The asset of First HV is its low and controlled leakage rate due to a tighter mesh of warp and weft yarns allowing only 14l/m²/s under 200pa. This is key for the manufacture of low flow and long length ducts.

What triggered its development ?

A business opportunity.

In 2015, ATC was asked to work on the Seine Aval wastewater treatment plant in Archères. This is the largest wastewater treatment plant in the Ile De France region; it covers 800 hectares. The SIAAP (Syndicat Interdépartemental pour l’Assainissement de l’Agglomértion Parisienne) was looking for an, economic, alternative solution to ventilate and depollute its wasterwater treatment units.

The purpose was to fight concentrations of chemical pollutants by moving them through fresh air introduction.

At ATC, ventilating and depolluting premises was part of our daily tasks as air distribution experts.
Nevertheless, the big size of premises, the geometric complexity, the air volume to be blown were so important that, during pre-design studies, the technical teams quickly highlighted the need to develop our traditional fabric range.

The technical and industrial issues identified were :
  • The resistance of our technical fabrics to aggressive chemical environments
  • The resistance of our materials to complex geometries
  • To limit the leakage rate to concentrate air diffusion in the most polluted areas with pressures above 1000 Pa.
  • To commit to a performance guarantee over time
  • To propose a solution allowing the cleaning of the ducts
We knew that our 100% polyester range met most of these requirements. There remained the issues of mechanical resistance and porosity of fabrics over uncommon lengths and diameters (ducts > 200 m long and Ø2200 mm in diameter).

In partnership with our local fabric supplier, we have developed a stronger 220g/m2 version of our flagship textile, the first LT (95g/m2).

Then we focused on the porosity!
After calculation, we determined that for the smooth functioning of the most unfavorable duct, the fabric should have an air permeability of +/- 15m3/h/m² under 200 Pa. Again, together with our partner, we calibrated the fabric manufacturing process in order to guarantee the respect of this data.

This is how the” little brother” HV was born, much less permeable than its “big brother”a LT!

To conclude

For us, an application is unique. We are committed to defining the optimum product that meets all the customer's industrial constraints. This is why we work with local suppliers in a long term partnership in order to guarantee you quality products that will last over time. Our development teams have a keen interest in your constraints and are only waiting for your call to define solutions with you.