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Natural and synthetic yarns, fibers, spuns, monofilaments and cutflock specialities from the reliable source Swicofil
Polybutylene-terephtalate PBT yarns

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PBT - the elastic yarn

Elastic yarns have become indispensable for the textiles industry. And in order to meet today's requirements to the full, our partners have come up with a brand new elastic philosophy - PBT.

PBT has extension capacities that surpass those of comparable yarns by one third. This highly elastic, friction textured PBT yarn will convince you with its soft, pleasant touch that is ideal for comfort clothing, in particular for sports.

Thanks to its unique recovery properties, PBT fabrics will always return to their original shape even after extreme strain. This ensures comfortable, body-hugging clothing that is ideal to wear for sports activities. 

PBT combines high resistance with extraordinary softness. Even after further manipulation, PBT won't lose its suppleness. 

The exceptional light-fastness of PBT is equivalent to that of a normal polyester. And its proven resistance to chlorine and UV rays makes PBT the perfect choice for all types of clothing.

And PBT will develop its strengths even when used in combination with natural and other synthetic fibres, thanks, amongst other things, to its 100 °C required dyeing temperature.

PBT yarns are used for sportswear, outerwear, underwear and for car interiors



  • is a textured polyester with a nylon crimp characteristic
  • is a high elastic, friction-textured material
  • has good stretch properties and unique recovery properties
  • is a high-resistant fiber that is both soft and elastic
  • is high resistant to perspiration and humidity
  • has both very low humidity take-up levels (only 0.4% approx.) and dries very quickly
  • is particularly suited for high-comfort clothing with an excellent wearing feel as well as for hard-wearing, body-forming leisure wear and for sports activities (e.g. swimwear with chlorine resistance, as opposed to polyurethane)
  • is available in the different counts
  • is for use in knitwear, warping and weaving
  • is excellent for mixing with all natural yarns that can be dyed at
    100 °C and with synthetic yarns that are also dyed at high temperatures

Properties and characteristics

  • elastic recovery with low subsequent ductility
  • good stretching with problem-free working properties
  • excellent texturing properties
  • resistant to chlorine, good base resistance, no loss of fastness through UV rays
  • light-fastness similar to that of a polyester 

Uses of PBT - yarns

  • Sportswear: track suits, jogging clothes, swimwear, gymnastic clothing, cycle-wear
  • Underwear: bodies, ladies' lingerie
  • Outerwear: leisure trousers, children's Lycra-wear
  • Car interior textiles: in the door area for better molding

The target of PBT is not to take market share for PA or PP but to change the consumers perception of polyester in general, to regain market share partially lost by polyesters previously poor image. Once textured:

  • PBT will have slightly more power stretch and recovery than PA 66, PA 6 and PES
  • PBT will have the best soft hand of all, as PBT will be close to PES
  • PBT can be easily dyed at 100°C and can be mixed with other fibers. It will offer stain resistance, chlorine resistance and a good resilience


Setila AG in Widnau (Decora, POY, Cops) has not been able to find a solution with a new investor to guarantee continuation and therefore is now definitely shutting down the production at the end of September 2005. Below please find the official good bye lines from Widnau.

The management and the staff of SETILA AG Widnau Switzerland, would like to express all our gratitude for these numerous years of the loyal cooperation in spite of the difficulties we had to handle with. The long history of our businesses finishes with stopping the production end of this month. 
After numerous successive and social plans and a situation which has gotten worse from day to day, we think that we have made the maximum to find a solution for SETILA AG and to gratify sufficiently about your wishes. 
We wish you for your future health and prosperity for your business as well as for your personal projects. We close the book of the SETILA AG, but we will open others. 
With faithful and cordial greetings. 
The Management 
The staff of the SETILA AG Widnau Switzerland
Fernand Fürst

Of course we all at Swicofil would have wished a solution with Widnau continuing to be the production site. 

Setila SA in Valence (FDY, POY) is a separate legal entity and as such not hit by the situation of Widnau. Swicofil will continue to sell the rawwhite Valence products.

For all current Swicofil sales which came out of Setila AG Widnau we have worked out a substitution plan and we will be providing the customers in the same good tradition with products of an excellent quality and an impeccable service. Looking forward to continue serving you with textile filament yarns both in rawwhite and spundyed. 



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