Method of making an endoprosthesis of compact thermoplastic comp

Details Method of making an endoprosthesis of compact thermoplastic comp Method of making an endoprosthesis of compact thermoplastic comp

1994-11-28

1998-02-03

Ortiz, Angela Y.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264258, 264136, 264137, B29C 4318, B29C 4352

Patent

active

057141053

ABSTRACT:
An endoprosthesis of compact thermoplastics including composite materials is disclosed. The endoprosthesis includes a plurality of prefabricated fibers such as carbon or aramid. Thermoplastics such as polyacrylates, polyaryl ether ketones, polycarbonates, polyether sulphones, polyethylenes or polyproplyenes are used as a binding agent. The prefabricated fibers have an internal core with predominately longitudinally oriented fibers and an enclosing covering with mutually intersecting fibers. The prefabricated fibers are cut to a length which is preferably five times their minimum diameter. The fibers are oriented substantially parallel to the major axis of the endoprosthesis. During molding and even in shallow cross- sections relative to the major axis of the endoprosthesis, each prefabricated fiber is at least partially overlapped by an adjoining prefabricated fiber. It is preferred that the prefabricated fibers at their ends take various forms including tapering, bevelled, and may have scooped, spherical or dished areas. A compression mold is used. The compression mold defines a female cavity which contains the elongate male profile of the endoprosthesis. Preheated prefabricated fibers are placed into the compression mold of the endoprosthesis. The fibers are all generally parallel to the major axis of the mold. Relative to cross-sections taken across the major axis of the mold, the number and array of the fibers varies as the particular cross-section varies. Specifically, at large cross-sections many fibers are found; at small cross-sections, the fibers are reduced in number.

REFERENCES:
patent: 3886600 (1975-06-01), Kahn
patent: 3893196 (1975-07-01), Hochman
patent: 4089071 (1978-05-01), Kalnberz
patent: 4454612 (1984-06-01), McDaniel
patent: 4506681 (1985-03-01), Mundell
patent: 4714467 (1987-12-01), Lechner
patent: 4902297 (1990-02-01), Devanathan
patent: 4927581 (1990-05-01), Medwin
patent: 4986948 (1991-01-01), Komiya et al.
patent: 5041260 (1991-08-01), Johnson et al.
patent: 5192330 (1993-03-01), Chang
patent: 5424017 (1995-06-01), Hinduja et al.

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