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US 5,176,862 AGranted
Process for the manufacture of stretched rope
AssigneeDsm N.V.
InventorsEric H. M. Hogenboom, Christiaan H. P. Dirks
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Abstract
The stiffness and the tensile strength of a rope containing polymeric filaments manufactured according to the gel spinning process are substantially increased by stretching it. The stretching is preferably carried out at elevated temperature but below the melting point of the filaments.
Claims11
A method of producing a stretched rope containing polymeric filaments comprising the steps of:
- (i) preparing a solution of at least one polymer;
- (ii) transforming said solution to filaments above the dissolution temperature of said at least one polymer;
- (iii) cooling said filaments to below said dissolution temperature of said at least one polymer to order to induce gelation;
- (iv) removing all or a portion of the solvent;
- (v) stretching said filaments while removing remaining solvent;
- (vi) forming said filaments into yarns;
- (vii) forming a rope from said yarns;
- (viii) stretching said rope in order to increase stiffness and tensile strength.
5 more elements
Dependencies are inferred from the claim text.