Rhone-poulenc-textile

Robert Cuidard

Pierre Chion

Marc Tricot

Jean Pommier

Bruno Giroud-Abel

Vincent Rochina

The invention relates to a homogeneous fluid composition which can be shaped, consisting of N-methylpyrrolidone-2, poly-para-phenyleneterephthalamide in an amount of 5 to 7% by weight, relative to the weight of the composition, calcium chloride or lithium chloride, and a tertiary amine with a pK H.sub.2 O equal to at most 6.60, and also to the process for its production. The composition can be shaped directly to form filaments, fibres, films or fibrids which can be used, for example, in the textile industry.

Poly-para-phenyleneterephthalamide compositions, their preparation and a

The present invention relates to a process and a device for the production of bi-component yarns containing bilaminar and multilaminar filaments. Two polymer compositions are spun after feeding through a dichotomic mixer possessing tubes of identical internal diameter (5 to 25 mm), inside which 4 to 9 helical elements are placed in series, the leading edge of each of the elements being placed at 90.degree. relative to the trailing edge of the previous element. The process and device according to the invention can be used for all types of spinning, namely solution spinning, melt spinning, semi-melt spinning and the like. The yarns obtained contain only a minor proportion of monolaminar filaments.

Device for the production of bi-component yarns

Process for the production of bi-component yarns

A process of making polyvinylidene fluoride yarns and fibers of homogeneous structure and good dry strength includes the steps of spinning the solution of the polymer into a coagulating bath containing 45 to 60% by weight aprotic polar organic solvent and 40 to 55% by weight water, stretching the filaments in air to a ratio of 1.5 to 5x and then in boiling water to a ratio of 1.5 to 4x (overall stretching ratio of 3x to 6.5x) and then washing in water at room temperature.

Poly(vinylidene fluoride) yarns and fibers

Process for the obtaining of poly(vinylidene fluorine) yarns and fibers

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Ecully, France

Robert Cuidard