Rhovyl

Rhone-poulenc-textile

Institut Textile De France

Georges Achard

Jacques Menault

Pierre Chion

Gilbert Anouilh

Roger Chatelin

Daniel Wattiez

Michel Bourgeois

Michel Sotton

Francois Belet

Roger Vincent

Roger Thouvenot

The fibrous polymeric material based on polyvinyl chloride contains at least one antiseptic mercury derivative distributed in its polymeric structure in the form of a substantially molecular and practically non-releasable dispersion. The preferred mercury derivatives have the following general formula: ##STR1## in which Y is H or HgX. If the concentration of the derivative is equal to at least 0.5% by weight, relative to the chlorofiber, the latter has a permanent antiseptic character. This material is obtained by incorporating the above-mentioned derivative into the collodion when the chlorofiber is spun.

Chlorofibers with permanent antiseptic character and process for their

The present invention relates to filaments based on a mixture of atactic polyvinyl chloride and postchlorinated polyvinyl chloride, and also to the process for their production. The filaments according to the present invention possess a residual shrinkage in boiling water of less than 2%, a modulus of elasticity of more than 3 kN/mm.sup.2 and a shrinkage stress, after shrinkage in an aqueous fluid medium at a temperature between 98.degree. and 130.degree. C., which is greater than or equal to 1.6.multidot.10.sup.-2 g/dtex. The filaments are obtained by spinning and stretching in a manner which is in itself known, then continuous stabilization under tension, at a temperature between 105.degree. and 125.degree. C., in the presence of steam under pressure, for 1 to 3 seconds, and then shrinkage in an aqueous fluid medium at a temperature between 98.degree. and 130.degree. C. The filaments according to the invention can be used, by themselves or blended with other filaments, for the production of woven fabrics, knitted fabrics and non-woven articles.

Yarns and fibers with good properties, based on a mixture of polyvinyl

Yarns and fibers based on atactic polyvinyl chloride possess a residual shrinkage in boiling water of less than 3%, a modulus of elasticity which is greater than or equal to 2 kN/mm.sup.2, an orientation index of the crystalline zones which is greater than or equal to 70%, an orientation index of the mesomorphic zones which is greater than or equal to 8%, and an orientation index of the amorphous zones which is greater than or equal to 5%. They are obtained by spinning and stretching in a known manner, then stabilization under tension at a temperature between 105.degree. and 130.degree. C., in the presence of steam under pressure, for 1 to 3 seconds, and then shrinkage in an aqueous fluid medium at a temperature between 98.degree. and 130.degree. C.

Process for production of yarns and fibers with good properties, based

The present invention relates to new homogeneous solutions based on polyvinyl chloride, which can be shaped, the process for their preparation and the shaped articles obtained. For a polymer concentration of 15 to 35%, the solutions have an effective viscosity of between 15 and 2,000 poises in a solvent medium which has, at ambient temperature, a solubility parameter of between 8 and 11 and a dielectric constant of between 5 and 25, and which gives, with polyvinyl chloride, a variation in effective viscosity with temperature, represented by a curve d.rho./d.theta., which passes through a maximum absolute value. They are obtained by heating a composition of polyvinyl chloride in the solvent medium to a temperature which is at least 25.degree. C. higher than the average temperature corresponding to the maximum of the curve d.rho./d.theta.. The yarns and fibres obtained, which have good properties, can be used by themselves or in a blend for the production of woven fabrics, knitted fabrics, non-woven structures and the like.

Solutions based on polyvinyl chloride, the process for their preparation

The present invention relates to yarns and fibers based on atactic polyvinyl chloride. They possess a residual shrinkage in boiling water of less than 3%, a modulus of elasticity which is greater than or equal to 2 kN/mm.sup.2, an orientation index of the crystalline zones which is greater than or equal to 70%, an orientation index of the mesomorphic zones which is greater than or equal to 8%, and an orientation index of the amorphous zones which is greater than or equal to 5%. They are obtained by spinning and stretching in a known manner, then stabilization under tension at a temperature between 105.degree. and 130.degree. C., in the presence of steam under pressure, for 1 to 3 seconds, and then shrinkage in an aqueous fluid medium at a temperature between 98.degree. and 130.degree. C.

Yarns and fibers good properties, based on atactic polyvinyl chloride,

The present invention relates to two-component acrylic fibres and yarns and their process of preparation. They consist of two copolymers based on acrylonitrile, in which the proportion of plasticizing comonomer differs by between 4 and 15% and which contain a total number of milliequivalents of acid of at least 50 per kg of polymer; they comprise a mixture of monolaminar, bilaminar and multilaminar strands; they possess a crimp, the direction of which depends on the heat and/or mechanical treatments to which they have been subjected, component B, which contains the smaller proportion of plasticizing comonomer, being located on the inside of the helix formed by the filaments, after treatment, without tension, at a temperature which is below about 110.degree. C. and at least equal to ambient temperature, and being located on the outside of the helix after treatment under tension or after heat treatment at a temperature above 110.degree. C., and the contraction and the crimp spacing varying from one strand to the next and along one and the same strand. The yarns and fibres according to the invention can be used in all the known textile-converting techniques, namely stretch-breaking, converting, carding and the like.

Two-component mixed acrylic fibres wherein acrylic components have

Acrylic yarns and fibers having a high shrinkage power, ranging up to 50%, obtained by wet spinning, a stretching of 1.3 to 3 .times. in air, washing, a stretching of 1 to 2.5 .times. into boiling water, drying, steaming at 105.degree.-150.degree. C., over-stretching of 1.2 to 2 .times. at 90.degree.-100.degree. C.

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Decines, France

Georges Achard