High strength, low stretch braided rope
AssigneeBerkley, Inc.
InventorHenry J. Holzhauer
Life of this patent
Estimating the term…
Abstract
A multi-filament rope which comprises a blend of filaments braided together to form a composite line structure. The core of the structure consists primarily of polyimide of an aromatic tetracarboxylic acid dianhydride, with the sheath consisting primarily of polyolefin fibers selected from the group consisting of polypropylene and polyethylene braided over the core.
Claims4
Multi-filament line means comprising a blend of filaments braided together to form a composite line structure and including a core with a multi-filament sheath braided thereover;
- a. said core comprising the combination of a first and a second plurality of filaments combined together with said first plurality of filaments consisting essentially of a polyolefin selected from the group consisting of polypropylene and polyethylene, and with said second plurality of filaments consisting essentially of polyimide of an aromatic tetracarboxylic acid dianhydride having the recurring unit with the structural formula:
- ##EQU3## wherein R is a tetravalent aromatic radical, and wherein R is a divalent benzenoid radical;
- b. said sheath comprising a plurality of filaments braided together and consisting essentially of polypropylene.
Multi-filament line means comprising a blend of filaments braided together to form a composite line structure and including a core with a multi-filament sheath braided thereover;
- a. said core comprising a plurality of filaments consisting essentially of a polyimide of an aromatic tetracarboxylic acid dianhydride having the recurring unit with the structural formula:
- ##EQU4## wherein R is a tetravalent aromatic radical, and wherein R is a divalent benzenoid radical;
- b. said sheath comprising a plurality of filaments braided together and consisting essentially of a polyolefin selected from the group consisting of polypropylene and polyethylene.
Dependencies are inferred from the claim text.