POLYPROPYLENE MONOFILAMENT SUTURES

• US 3,630,205 A
• Filed: 07/31/1969
• Issued: 12/28/1971
• Est. Priority Date: 07/31/1969
• Status: Expired due to Term

• Current Assignee: Gregory J. Listner
• Original Assignee: Gregory J. Listner
• Inventors: Listner, Gregory J.
• Application Number:
  US04/846,412
• Time in Patent Office: 880 Days
• US Class Current: 606/231
• CPC Class Codes: A61B 17/06166 Sutures suture materials A61L17/00; manufacture of artificial threads D01D; treatment of threads D06M
• CPC Class Codes: A61L 17/14 Post-treatment to improve physical properties
• CPC Class Codes: C08L 23/12 Polypropene
• CPC Class Codes: D01F 6/06 from polypropylene
• CPC Class Codes: Y10S 264/73 Processes of stretching
• CPC Class Codes: Y10T 442/688 Containing polymeric strand or fiber material

Abstract

A flexible, uniform monofilament of isotatic polypropylene having an improved hand and an ultimate elongation greater than 35 percent is prepared by extruding isotatic polypropylene having a weight average molecular weight between 299,000 and 316,000 to form a monofilament, stretching said monofilament at 300* F. to about 6.6 times its original length, and subsequently permitting the stretched monofilament to contract to between 91 percent and 76 percent of its stretched length.

Claims

2. A needled surgical suture comprising an isotactic polypropylene suture attached to a surgical needle, said needle and said suture being sterile, said isotactic polypropylene having approximately the following characteristics:

Weight Average Molecular Weight about 294,000 to about 316,000 Number Average Molecular Weight about 78,400 to about 82,100 Tensile Strength 3.9 to 8.9 grams/denier denier Knot Strength 3.3 to 7.9 grams/denier Break Elongation 36% to 62% Young'"'"''"'"'s Modulus about 3.13 X 105 p.s.i. to about 5.23 X 105 p.s.i.

3. A surgical suture package comprising a sterile enclosure and therein a sterile needled surgical suture comprising an isotactic polypropylene suture attached to the surgical needle, said isotactic polypropylene having approximately the following characteristics:

Weight Average Molecular Weightabout 294,000 toabout 316, 000Number Average Molecular Weightabout 78,400 toabout 82, 100Tensile Strength3.9 to 8.9 grams/denierKnot Strength3.3 to 7.9 grams/denierBreak Elongation36% to 62%Young'"'"''"'"'s Modulusabout 3.13 X 105 p.s.i. toabout 5.23 X 105 p.s.i.