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:
Nov. 25, 1986
Filed:
Jan. 15, 1985
Frederic N Cogswell, Guisborough, GB;
Umakant Measuria, Great Ayton, GB;
Imperial Chemical Industries PLC, London, GB;
Abstract
A process for impregnating a fibrous product, said fibrous product being a fabric woven from reinforcing fibres or a fabric of randomly disposed fibres, with a matrix polymer comprising causing partial impregnation of the fibrous structure by introducing the fibrous structure into a molten composition comprising the matrix polymer and a melt plasticizer for the matrix polymer and subsequently causing substantially complete wetting of the filaments of the fibrous structure by volatilizing the melt plasticizer from the partially impregnated structure at a temperature at which the polymer is molten, the melt plasticizer being thermally stable at the temperature of the melt and having volatility characteristics such that the plasticizer can be removed below the decomposition temperature of the melt but sufficiently involatile at the temperature of the melt to permit the viscosity of the melt to be reduced by comparison with the melt viscosity of the polymer at the same temperature. When a woven fabric is employed thermoformable composites can be obtained having short beam shear strength values at least 0.7 times the tensile strength of the plastics matrix material of the composite.