LIOD, the underwear for sports! 100% Made in Italy  

Discover the fiber

Polypropylene (PP) is a polymer, from the greek many parts, discovered by the scholar Prof. Giulio Natta who, with the German Karl Ziegler, were awarded the Nobel Prize for chemistry in 1963.

Prof. Giulio Natta



Chemical formula of polypropylene


As one can see from the above photo dated March 11, 1954, Prof. G. Natta, director of the Institute of Industrial Chemistry of Milan Polytechnic, noted in his diary "Polypropylene done."
This opened a road in the search for its applications in various fields.
The first field of application of this fiber was in textile flooring or carpeting, for its high resistance to abrasion, non-absorption of dirt, liquids and stains, the ease of washing and color resistance.
Initially, PP fiber was excluded from the apparel industry for its inability to be dyed, ironed or drycleaned.
It was in 1986 that Mr. Fernando Scotti, with his perspicacity, saw the functionality of this polymer.

Dr. Scotti




From his studies and research carried out at Filatura e Torcitura of Delebio, and then developed at Reziafil, a company created specifically for the testing and marketing of PP, Mr. Scotti presented an avant-garde report at the International Congress of Textile Fibers, which takes place in Dorbin (Austria) each year:


“THIN PP FILAMENT YARN, PASTE DYED AND TEXTURED”


Dorbin Conference






We will now try to explain how the engineer Fernando Scotti came to the realization of this yarn.
PP is a polymer, to which colored pigments (dyes) are added to obtain a yarn that does not discolour.



Yarn of PP

Pigment PP Polymer



The polymer is transformed from a solid state to a liquid-viscous state by means of fusion.


Spinning through fusion Section of a polypropylene thread




As you can see the die is a metal disc with a certain number of holes of a well-defined diameter. This phase is called extrusion.
Once the polymer exits from the die, it is solidified, forming many individual fibers called filaments or burrs.






For the realization of this somewhat laborious process, Mr. Scotti studied, created and patented a complete cycle of pressing and texturing that no one has yet been able to reproduce.



Line drawing of PP texturing - Engineer F. Scotti





Years later, LIOD still follows the guidelines based on the studies of Engineer F. Scotti and Dr. M. Scotti, not only improving on research with the tools available today, but always remaining attentive to innovations in the textile industry to be at the forefront with an increasingly technical fabric.
It is for this reason that a LIOD product is different from all those who have tried to imitate it!

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