The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 1985
Filed:
Mar. 18, 1983
Georges Achard, Decines, FR;
Jacques Menault, Charbonnieres-les-Bains, FR;
Roger Thouvenot, Ligny-en-Barrois, FR;
Rhovyl, Neuilly-sur-Seine, FR;
Abstract
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.