High strength small diameter fishing line

Patent metadata

Field	Value
Publication number	US-2016122918-A1
Application number	US-201414526701-A
Country	US
Kind code	A1
Filing date	Oct 29, 2014
Priority date	Oct 29, 2014
Publication date	May 5, 2016
Grant date	—

Abstract

Elongated bodies made from high tenacity polyolefin fibers are provided that are useful as fishing lines, and processes for making the lines. Fibers having tenacities of at least 39 g/denier are braided and fused together to form braided bodies having very small diameters.

First claim

What is claimed is:

1 . An elongate body comprising a plurality of fibers, wherein said fibers are braided together and form a braided body, wherein at least one of said fibers forming the braided body comprises an ultrahigh molecular weight polyolefin fiber having a tenacity of at least 39 g/denier.

2 . The elongate body of claim 1 wherein some or all of the fibers of the braided body are multifilament, ultra high molecular weight polyethylene fibers.

3 . The elongate body of claim 2 wherein said multifilament fibers are either twisted or air entangled.

4 . The elongate body of claim 2 wherein said multifilament fibers are neither twisted nor air entangled.

5 . The elongate body of claim 2 wherein each of the fibers forming the braided body are ultra high molecular weight polyethylene fibers having a tenacity of at least about 43 g/denier and an intrinsic viscosity of greater than about 19 dl/g.

6 . The elongate body of claim 1 wherein the braided body has an elongation of about 4.0% or less when the braided body is subjected to a continuous stress equal to 10% of the breaking strength of the braided body for 300 minutes at 70° C.

7 . The elongate body of claim 1 wherein the some or all of the fibers of the braided body are multifilament, ultra high molecular weight polyethylene fibers having an intrinsic viscosity of greater than 19 dl/g, and wherein the braided body has a thermal shrinkage as determined by ASTM D4974 at 145° C. of less than 2.5%.

8 . The elongate body of claim 7 wherein the braided body has an elongation of less than 1.5% when subjected to a continuous stress equal to 10% of the breaking strength of the braided body for 10,000 minutes at room temperature.

9 . The elongate body of claim 1 wherein the braided body has a braid density of at least about 0.5 pick per inch up to 20 picks per inch in length of the braided body.

10 . The elongate body of claim 1 wherein the fibers forming the braided body are unfused.

11 . The elongate body of claim 1 wherein the fibers forming the braided body each have a denier of from about 30 to about 400.

12 . The elongate body of claim 1 wherein said elongate body has a greater breaking strength relative to a comparison elongate body having an identical diameter, wherein the comparison elongate body is equivalent to the elongate body except that all fibers forming the comparison elongate body have a tenacity of less than 39 g/denier.

13 . The elongate body of claim 1 wherein the elongate body further comprises a core fiber that is at least partially surrounded by the braided body.

14 . The elongate body of claim 13 wherein the core fiber comprises a polyolefin fiber having a tenacity of at least 39 g/denier, wherein the braided body and core fiber are fused together.

15 . The elongate body of claim 13 wherein the core fiber comprises a polyester fiber or a fluororesin fiber.

16 . The elongate body of claim 1 wherein the braided body comprises at least four multifilament ultra high molecular weight polyethylene fibers, each having a tenacity of at least about 45 g/denier, a tensile modulus of at least about 1400 and an intrinsic viscosity of greater than about 19 dl/g.

17 . A method of making an elongate body comprising the steps of:
a) providing a plurality of polymeric fibers, wherein at least one of the polymeric fibers comprises an ultrahigh molecular weight polyolefin fiber having a tenacity of at least 39 g/denier; b) optionally coating at least a portion of each fiber with either a thermoplastic resin or an oil; c) optionally twisting or entangling the fibers; d) braiding the polymeric fibers together to form a braided body; e) optionally stretching said braided body, wherein the braided body is optionally heated during and/or before stretching to a temperature below the melting point of the fibers; and f) optionally fusing together the fibers forming the braided body.

18 . The method of claim 17 wherein the fibers forming the braided body are unfused.

19 . The method of claim 17 wherein some or all of the fibers of the braided body are multifilament, ultra high molecular weight polyethylene fibers having a tenacity of at least about 43 g/denier.

20 . A method of making an elongate body comprising the steps of:
a) providing a plurality of fibers, wherein at least one fiber comprises an ultrahigh molecular weight polyolefin fiber having a tenacity of at least 39 g/denier; b) optionally coating at least a portion of each fiber with either a thermoplastic resin or an oil; c) optionally twisting or entangling the fibers; d) braiding the plurality of fibers around a core fiber, thereby forming a braided body around the core fiber; e) optionally stretching said braided body and core fiber, wherein the braided body and core fiber are optionally heated during and/or before stretching; and f) optionally fusing together the fibers forming the braided body.

Assignees

• Honeywell Int Inc

Inventors

• Tam Thomas
• Nguyen Huy Xuan
• Wagner Lori L
• Tallent Mark
• Miller Christopher B

Classifications

• D07B2207/4045

  to change the crystal structure of the load bearing material · CPC title

• D07B2201/1096

  braided · CPC title

• D07B2205/2003

  Thermoplastics · CPC title

• D07B1/025

  comprising high modulus, or high tenacity, polymer filaments or fibres, e.g. liquid-crystal polymers · CPC title

• A01K91/00 Primary

  Lines · CPC title