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:
Apr. 26, 1977
Filed:
Jan. 23, 1975
Applicant:
Inventors:
Frederick Charles Frank, Bristol 9, EN;
Andrew Keller, Bristol 9, EN;
Malcolm Robert Mackley, Bristol 8, EN;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
528498 ; 260 / ; 260 / ; 260 / ; 526351 ; 526352 ; 528502 ;
Abstract
Crystalline polymer fibrils having a highly ordered crystalline core surrounded by less ordered crystalline polymer are produced by causing a solution of the polymer to flow through a gauze. The solution is at a temperature below the dissolution temperature of the polymer but above the temperature at which the polymer will crystallize spontaneously in an unstirred solution. The flow rate is selected in relation to the gauze dimensions to impart a sufficiently high longitudinal velocity gradient to the solution flowing through the gauze, preferably about 10.sup.2 sec.sup..sup.-1 or greater.