Teijin Aramid B.v.

Wido Nijenhuis

Hanneke Boerstoel

Bert Gebben

Philippe Bussi

Julien Jouanneau

Jorrit De Jong

Jorrit Jong De

Naoya Komiya

René P Verhoef

Rene La Faille

Rasid Günes

Christiaan J M Van Den Heuvel

Said Boudebah

Joannes H M Quaijtaal

Stan Maassen

Martijn Arnoldus Johannes Veld

Christiaan JM Van Den Heuvel

A continuous process for the recycling of aramid fiber comprising the following steps: combining aramid fibrous material including non-continuous aramid fibers with sulfuric acid to obtain a spin dope comprising aramid, and processing the spin dope including aramid into a continuous aramid fiber. The invention also pertains to a continuous aramid fiber, preferably obtainable by said process, and to a multifilament yarn including the continuous aramid fiber.

Continuous process for recycling

A process for manufacturing a fiber including polyetherketoneketone including the steps of: mixing polyetherketoneketone and sulfuric acid having a concentration of at least 90 wt % to obtain a spin dope and passing the spin dope through a spinneret into a coagulation bath, wherein the polyetherketoneketone is dissolved in the sulfuric acid to a concentration of 12 to 22 wt %. Also disclosed are fibers obtainable by the process and polyetherketoneketone fibers having a sulfur content of 0.001 to 5 wt %, based on the weight of the fiber, in particular such fibers having low or high crystallinity, as well as, hybrid yarns and composite materials.

Process for the manufacture of polyetherketoneketone fiber

A polyarylene fiber including 0.1-15% based on the weight of the fiber of an aromatic compound or a combination of aromatic compounds wherein each aromatic compound comprises an aromatic core and at least one of the substituents A or B, where A is represented by formula 1 and B is represented by formula 2  Also, a spin dope and a process for manufacturing a polyarylene fiber.

Polyarylene fiber with improved hydrolytic stability

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Huissen, Netherlands

Wido Nijenhuis