Press Release

Hardly Inflamable, Sustained, PET- High Strength, 704 FR

Bad Hersfeld,  October 15th 2018: The Filament Factory (TFF) will introduce a new line of permanent flame-retardant polyester high tenacity filaments. The flame-retardant properties of the Type 704 FR yarns are achieved by the use of a halogen-free polymer additive. The additive is linked to the polymer by means of both physical and chemical bonds and is thus permanent and non-migrating.

The new product line is manufactured according to a newly developed process and allows variable adjustment of phosphor levels depending on the final end use requirements. TFF is currently the only manufacturer that has such a product

The properties of these new functional high-performance multifilament yarns are clearly superior to those of current flame-retardant yarns. Strengths above 65 cN/tex (7.3 g / denier) and hot air shrinkage values of less than 2.6% (180°C; 15 min, without pretension) can be achieved, allowing the production of textiles with special properties.

Due to the two-stage production process, the properties such as shrinkage, specific strength and elongation are extremely constant.

Thanks to its unique molecular structure, Type 704 FR yarns show significantly lower loss of strength compared to conventional flame-retardant polyester yarns.

Type 704 FR yarns provide lasting flame retardance and self-extinguishing behavior.

Unlike topically applied flame-retardant treatments, Type 704 FR yarns have inherent protection that does not wash off or degrade over time.

With the use of the new development Type 704 FR, our customers are able to achieve the fire classes M1, B1 / B2 as well as SE / NBR according to DIN75200 / FMVSS302.

Areas of application for these new PET high-tenacity multifilament yarns are textile architecture, tents, silos, tarpaulins, automotive, printing and filter media, ventilation ducts and others.

The new yarn family will be available in titers from 33 dtex (30 denier) up to 6600 dtex (6000 denier) and, if required, can also be offered as twisted yarns and spun-dyed yarn according to requirements.

"With this new development, we have made a breakthrough to increase the range of specialty yarns that we offer worldwide," says Matthias Hess, Managing Director TFF.


Please publish modules in offcanvas position.