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:
Dec. 11, 1979
Filed:
Mar. 10, 1978
Applicant:
Inventor:
Paul Snowden, Stockton-on-Tees, GB;
Assignee:
Imperial Chemical Industries Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
264-8 ; 264 12 ; 264164 ; 264236 ;
Abstract
Formaldehyde resin fibres, in particular urea formaldehyde resin fibres, are produced by introducing a liquid formaldehyde resin and a catalyst into a spinning cup in the presence of cold humid air which inhibits drying and reaction, centrifugally spinning fibres from the cup into the path of hot air currents, at between 50.degree. C. and 100.degree. C., which dry the fibres without curing them, and curing and chemically stabilizing the dry fibres by heating at above 100.degree. C. until they are insoluble in cold water.