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US 5,626,811 AGranted
Process of making a monofilament
AssigneeUnited States Surgical Corporation
InventorCheng-Kung Liu
Life of this patent
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Abstract
Monofilaments fabricated from polymers derived in whole or in part from p-dioxanone are provided. The monofilaments exhibit improved tensile properties such as straight-pull strength and knot-pull strength. The monofilaments can be employed in the fabrication of a wide variety of surgical devices such as sutures, fabric prostheses, and the like.
Claims13
A method of manufacturing a monofilament which comprises:
- a) extruding and quenching a polymer derived in whole or in part from p-dioxanone to provide a solidified monofilament;
- and
- b) increasing the tensile strength of the monofilament by cold drawing the solidified monofilament, whereby the cold drawn monofilament has a higher tensile strength compared to a monofilament similarly processed except using only hot drawing.
A method of manufacturing a monofilament which comprises:
- a) extruding a polymer derived in whole or in part from p-dioxanone to provide a molten monofilament;
- b) quenching the molten monofilament to provide a solidified monofilament;
- c) cold drawing the solidified monofilament at a draw ratio ranging from about 3:1 to about 10:1 and a temperature ranging from about 10.degree. to about 25.degree. C.;
- d) hot drawing the cold drawn monofilament;
- and,
- e) annealing the hot drawn monofilament to provide a monofilament exhibiting increased tensile strength properties relative to a monofilament which is fabricated from the same polymer and produced in accordance with conventional hot drawing procedures.
3 more elements
Dependencies are inferred from the claim text.