Rhone-poulenc Fibres

Michel Buzano

Joanny Danancier

Michel Randon

A twisted spun fibre yarn with interlaced plies, in which the fibres have a spiral structure having open zones and closed zones, the cohesion factor of the spun fibre yarn being less than 100 and preferably between 20 and 80, the torsion factor of the spun yarn having a value of between 25 and 40% of the torsion factor normally used in the conventional processes for a spun yarn of the same count. A method and apparatus is also described for its manufacture this involving the use of a pneumatic interlacing means and which may be used either continuously or discontinuously.

Spun fibre yarn and method for its manufacture

Spun-like fiber yarn with interlaced threads, in which the fibers are of the same length. The spun yarn has alternating open, relatively bulky zones and closed, relatively compact zones. The open zones have a non-twisted structure with parallel strands. In the closed zones, the fibers are interlaced and non-bonded. The open zones furthermore have free strands. The cohesion factor of the spun fiber yarns is greater than 100 and preferably being between 120 and 180. The spun yarns are produced by a process in which at least one sliver of fibers of equal lengths is fed to a drawing unit and then to at least one open single-jet interlacing nozzle fed with gaseous fluid at a pressure of between 1 and 6 bars, the angle formed by the axis of the channel for the passage of the yarn in the nozzle and the yarn being between 10.degree. and 80.degree., and the spun yarn obtained being wound up at a speed greater than 50 m/min. A device for carrying out the process includes at least one drawing unit, means to feed at least one sliver, tow or band of fibers to the drawing unit, at least one single jet fluid utilizing means of interlacing, means for regulating the tension of the spun yarn at the exit of the interlacing means and means for winding up the spun fiber yarn so obtained. The spun fibers can be used for all textile applications and provides good fabric coverage.

Growing community of inventors

Villeurbanne, France

Michel Buzano