|United States Patent||3,853,462|
|Smith||December 10, 1974|
Knitted flat stock or tubing fabric material of a suitable polyester material such as polyethylene terephthalate is treated to reduce its porosity. The resulting product is useful as a synthetic inter-cardiac (e.g., vascular) prosthesis. Treatment is performed by immersing the knitted fabric material in a compacting solution containing a minor amount of an acidic organic component and a major amount of a halogenated aliphatic hydrocarbon having up to about 6 carbon atoms for a time sufficient to reduce the porosity of the knitted fabric material at least about 30 percent in the wale direction. A mixture containing about 90 to 98 percent by weight of methylene chloride and about 10 to 2 percent by weight of hexafluoroisopropanol is an example of a suitable compacting solution.
|Inventors:||Smith; Ray E. (Homewood, AL)|
Meadox Medicals, Inc.
|Filed:||February 23, 1972|
|Current U.S. Class:||8/130.1 ; 623/1.1; 66/170; 8/DIG.21|
|Current International Class:||A61F 2/06 (20060101); D06M 13/144 (20060101); D06M 13/08 (20060101); D06M 13/152 (20060101); D06M 13/00 (20060101); D06m 005/04 (); A61g 001/24 ()|
|Field of Search:||8/130.1,DIG.4 139/387R 66/170 3/DIG.1|
The Merck Index, Seventh Edition, 1960, pages 243, 245, 294, 428, 676, 795, 1020 and 1058..