Ultra-high-molecular-weight polyethylene products including vasc

Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Arterial prosthesis – Stent structure

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138103, 138129, 264 41, 2642888, 264299, 26433115, 521 64, 521143, 623 16, A61F 206, C08J 928, B29C 4300, B29C 5522

Patent

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046557695

ABSTRACT:
A pseudo-gel comprising a suitable solvent in an amount of 99 to 90 percent by weight and an ultra-high-molecular-weight polyethylene in an amount of 1 to 10 percent by weight, said polyethylene being a semicrystalline network with adjustable crystalline morphology comprising randomly dispersed and oriented chain-folded single crystals, stacks of single crystals, spherulite crystals, and extended-chain shish-kebab-type of fibrils with lengths up to a few millimeters and widths up to 20 .mu.m. Also, the semicrystalline ultra-high molecular-weight polyethylene obtained by removal of said solvent from the pseudo-gel. Further, a method for making the pseudo-gel and the ultra-high-molecular-weight polyethylene product.

REFERENCES:
patent: 3954927 (1976-05-01), Duling et al.
patent: 4413110 (1983-11-01), Kavesh et al.
patent: 4440211 (1984-04-01), Kwon et al.
Lemstra, Piet J. and Paul Smith "Ultra-Drawing of High Molecular Weight Polyethylene" In British Polymer Journal, Dec. 1980, pp. 212-214.

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