Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1982-09-30
1984-02-07
McCamish, Marion
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
2642108, D02G 300
Patent
active
044303831
ABSTRACT:
The invention relates to the preparation of filaments with a high tensile strength and a high modulus and to the filaments thus prepared. A solution of a linear polyethylene with a weight-average molecular weight of at least 4.times.10.sup.5 is spun and the filaments, from which the solvent may have been removed in whole or in part, are drawn using a draw ratio of at least (12.times.10.sup.6 /M.sub.w)+1. The filaments are drawn at a temperature such that the modulus is at least 20 GPa.
The invention allows filaments to be prepared at high drawing rates, of 0.5 sec.sup.-1 or more, with a modulus of at least 20 GPa and a tensile strength of at least 1 GPa.
REFERENCES:
patent: 3048465 (1962-08-01), Jurgeleit
patent: 3962205 (1976-06-01), Ward et al.
patent: 4276348 (1981-06-01), Wu et al.
Polymer Bulletin 1, pp. 733-736, Published Nov. 1979, by Smith, Lemstra, Kalb and Pennings.
Makro mol. Chem. 180, pp. 2983-2986, Published Dec. 1979, by Smith and Lemstra.
Polymer Bulletin 1, pp. 871-876, Published Nov. 1979, by Kalb and Pennings.
Journal of Materials Science, vol. Fifteen, pp. 505-514, Published Feb. 1980, by Smith and Lemstra.
Colloid & Polymer Science 258, pp. 891-894, Published Jul. 1980, by Smith and Lemstra.
Hackh's Chemical Dictionary, Fourth Edition, p. 665.
Lemstra Pieter J.
Smith Paul
Johnson Beverly K.
McCamish Marion
Stamicarbon B.V.
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