WO2006101723A1 - A rope - Google Patents
A rope Download PDFInfo
- Publication number
- WO2006101723A1 WO2006101723A1 PCT/US2006/008091 US2006008091W WO2006101723A1 WO 2006101723 A1 WO2006101723 A1 WO 2006101723A1 US 2006008091 W US2006008091 W US 2006008091W WO 2006101723 A1 WO2006101723 A1 WO 2006101723A1
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- WO
- WIPO (PCT)
- Prior art keywords
- filament
- rope
- filaments
- providing
- twisted
- Prior art date
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Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
- D07B1/04—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics with a core of fibres or filaments arranged parallel to the centre line
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
- D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
- D04C1/06—Braid or lace serving particular purposes
- D04C1/12—Cords, lines, or tows
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
- D07B1/025—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics comprising high modulus, or high tenacity, polymer filaments or fibres, e.g. liquid-crystal polymers
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1012—Rope or cable structures characterised by their internal structure
- D07B2201/1014—Rope or cable structures characterised by their internal structure characterised by being laid or braided from several sub-ropes or sub-cables, e.g. hawsers
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1092—Parallel strands
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1096—Rope or cable structures braided
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2036—Strands characterised by the use of different wires or filaments
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2041—Strands characterised by the materials used
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
- D07B2201/209—Jackets or coverings comprising braided structures
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
- D07B2201/20903—Jackets or coverings comprising woven structures
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/20—Organic high polymers
- D07B2205/201—Polyolefins
- D07B2205/2014—High performance polyolefins, e.g. Dyneema or Spectra
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/20—Organic high polymers
- D07B2205/2039—Polyesters
- D07B2205/2042—High performance polyesters, e.g. Vectran
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/20—Organic high polymers
- D07B2205/2046—Polyamides, e.g. nylons
- D07B2205/205—Aramides
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/20—Organic high polymers
- D07B2205/2071—Fluor resins
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/20—Organic high polymers
- D07B2205/2096—Poly-p-phenylenebenzo-bisoxazole [PBO]
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2401/00—Aspects related to the problem to be solved or advantage
- D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
- D07B2401/2065—Reducing wear
- D07B2401/207—Reducing wear internally
Definitions
- the instant application relates to a rope for various types of applications including, but not limited to, heavy lifting or mooring applications, such as marine, oceanographic, offshore oil and gas, seismic, and industrial applications.
- heavy lifting or mooring applications such as marine, oceanographic, offshore oil and gas, seismic, and industrial applications.
- a rope may be a stout cord made of strands of natural or artificial fibers twisted or braided together, or in the alternative, a rope may be a cord having a wire core with fiber strands braided around it .
- Rope failure may be caused by different damage mechanism, e.g. frictional heat generated within the rope, or self-abrasion.
- the frictional heat generated within a rope may be caused by the bending mechanism; or in the alternative, it may be cause by the rope rubbing against a drum, a pulley, or a sheave.
- the frictional heat generated within a rope can be great enough to cause a W catastrophic failure of the rope. This problem is particularly evident when the fiber material looses a substantial amount of strength, i.e. becoming susceptible to creep rupture, when heated above ambient temperature.
- jacketing the subropes is employed to reduce self-abrasion since it is widely known that the primary occurrence of self-abrasion is at the intersection between the subropes.
- Jacketing refers to the placement of a sleeve material (e.g., woven or braided fabric) over the subrope, so that the jacket is sacrificed to save the subrope.
- These jackets add to the overall diameter, weight, and cost of the rope without any appreciable increase in the rope's strength. The larger size is obviously undesirable because it would require larger drums, pulleys, or sheaves to handle the jacketed rope.
- rope jackets make visual inspection of the rope core fibers problematic because the jacket hides the core fibers. Therefore, while this solution may be viable, it is considered unsatisfactory.
- U.S. Patent No. 5,931,076 discloses a method for construction of a large diameter braided rope.
- the rope is formed of high strength, low elongation synthetic fibers that are twisted together at a twist factor in the range from about 125 to about 145 to form a plurality of comparatively small diameter yarns.
- the small diameter twisted yarns are then braided together at a pick multiplier in the range from about 1.0 to about 2.0 so as to form a plurality of braided strands, and the strands, in turn, are braided together with a pick multiplier of about 2.0 to about 3.6 so as to form the large diameter braided rope.
- U.S. Patent No. 5,901,632 discloses a method for forming a braided rope. Twisted yarns are first braided together to form braided strands, and the braided strands are then braided together to form a rope .
- U.S. Patent No. 4,534,163 discloses a synthetic rope or cable.
- a plurality of filaments are brought in parallel into a core and compacted by a plurality of ribbons or tapes wound about the core under tension in opposite directions to form a uniform jacket that is torsionally stable.
- An outer sheath which may be urethane or other plastic material is applied to the jacket under sufficient pressure to penetrate the jacket but not the core, and then the urethane is cured.
- This rope or cable has a core of substantially parallel filaments free to move within the jacket of ribbons wound about the core and penetrated with urethane or other plastic material .
- US 2004/0069132 discloses a large diameter rope having improved fatigue life on a sheave, pulley, or drum.
- the rope includes a blend of HMPE filaments and liquid crystal polymer filaments selected from the group of lyotropic polymer filaments and thermoplastic polymer filaments.
- the rope may be constructed as a braided rope, a wire- lay rope, or a parallel core rope.
- the instant invention is a rope.
- This rope includes a blend of filaments including a first filament, and a second filament.
- the second filament is a fluorocarbon polymer filament.
- Fig. IA is an elevational view of a length of a first embodiment of a rope made according to the present invention.
- Fig. IB is an elevational view of a length of a twisted yarn of the rope of Fig. IA;
- Fig. 1C is an elevational view of a length of a braided strand of the rope of Fig. IA;
- Fig. ID is an exploded view of an end portion of the first embodiment of the rope of Fig. IA, schematically illustrating the manner in which twisted yarns are braided together to form braided strands which are then braided together to form the rope of Fig. IA;
- Fig. 2A is an elevational view of a length of a second embodiment of a rope made according to the present invention.
- Fig. 2B is an elevational view of a length of a twisted strand of the rope of Fig. 2A;
- Fig. 2C is an elevational view of a length of a twisted yarn of the rope of Fig. 2A;
- Fig. 2D is an exploded view of an end portion of a second embodiment of a rope made according to the present invention, schematically illustrating the manner in which twisted yarns are twisted together to form twisted strands which are then twisted together to form a rope;
- Pig. 3A is an elevational view of a length of a third embodiment of a rope made according to the present invention, schematically illustrating the manner in which the rope is made;
- Fig. 3B is a cross sectional view of the rope of Fig. 3A along the lines 3b-3b.
- a first exemplary embodiment of a rope 10 according to the instant invention.
- This rope 10 includes a blend of filaments 12.
- Blend of filaments 12 includes a first filament 14, and a second filament 16.
- Blend of filaments 12 may further include a third filament (not shown) .
- First filament 14 may be any high strength filament.
- first filaments 14 may be high modulus polyethylene filaments (“HMPE”) that are spun from ultrahigh molecular weight polyethylene (“UHMWPE”) resin.
- HMPE filaments are commercially available under the tradename of SPECTRA ® from Honeywell Performance Fibers of Colonial Heights, VA, and DYNEEMA ® from DSM NV of Heerlen, The Netherlands, and Toyobo Company Ltd. of Osaka, Japan.
- the first filament 14 may be a liquid crystal polymer (LCP) filament selected from the group consisting of lyotropic polymer filament and thermotropic polymer filament . Lyotropic polymers decompose before melting but form liquid crystals in solution under appropriate conditions (these polymers are solution spun) .
- LCP liquid crystal polymer
- Lyotropic polymer filaments include, for example, aramid and polyphenylene benzobisoxazole (PBO) fibers.
- Aramid filaments are commercially available under the tradename KEVLAR ® from Dupont of Wilmington, DE, TECHNORA ® from Teijin Ltd. of Osaka, Japan, and TWARON ® from Teijin Twaron BV of Arnhem, The Netherlands.
- PBO fibers are commercially available under the tradename ZYLON ® from Toyobo Company Ltd. of Osaka, Japan.
- Thermotropic polymers exhibit liquid crystal formation in melt form.
- Thermotropic filaments are commercially available under the tradename VECTRAN ® from Celanese Advanced Materials, Inc. of Charlotte, NC.
- the first filaments 14 may constitute between about 1 to 99 percent volume of the blend 12.
- the second filament 16 may be any filament.
- second filament 16 may be a fluorocarbon polymer.
- fluorocarbon polymer includes, but is not limited to, poly (tetrafluoroethylene) ("PTFE") .
- PTFE fibers filaments are commercially available from W. L. Gore & Associates, Inc. of Newark, DE and Elkton, MD.
- the second filaments 16 may constitute between about 1 to 40 percent volume of the blend 12.
- the third filament may be any high strength filament.
- third filaments may be high modulus polyethylene filaments ("HMPE") that are spun from ultrahigh molecular weight polyethylene (“UHMWPE”) resin.
- HMPE filaments are commercially available under the tradename of SPECTRA ® from Honeywell Performance Fibers of Colonial Heights, VA, and DYNEEMA ® from DSM NV of Heerlen, The Netherlands, and Toyobo Company Ltd. of Osaka, Japan.
- the third filament may be a liquid crystal polymer (LCP) filament selected from the group consisting of lyotropic polymer filament and thermotropic polymer filament . Lyotropic polymers decompose before melting but form liquid crystals in solution under appropriate conditions
- Lyotropic polymer filaments include, for example, aramid and polyphenylene benzobisoxazole
- PBO fibers Aramid filaments are commercially available under the tradename KEVLAR ® from Dupont of Wilmington, DE, TECHNORA ® from Teijin Ltd. of Osaka, Japan, and TWARON ® from Teijin Twaron BV of Arnhem, The Netherlands.
- PBO fibers are commercially available under the tradename ZYLON ® from Toyobo Company Ltd. of Osaka, Japan.
- Thermotropic polymers exhibit liquid crystal formation in melt form.
- Thermotropic filaments are commercially available under the tradename VECTRAJST ® from Celanese Advanced Materials, Inc. of Charlotte, NC.
- the third filaments may constitute between about 1 to 99 percent volume of the blend 12.
- Rope 10 may further include a coating. It is believed, but the invention should not be so limited, that the coating improves upon the abrasion resistance of the blend 12.
- the coating may be any coating.
- the coating may, for example, be a synthetic polymer based product.
- the coating may be a polyurethane coating.
- Rope 10 may have any amount of coating. Coating may be applied to rope 10 via known conventional methods, which includes but is not limited to, impregnating rope 10 with coating by soaking rope 10 in the coating.
- Rope 10 may have different rope constructions.
- rope 10 may have a rope construction selected from the group consisting of a braided rope construction, wire-lay rope construction, and parallel core rope construction.
- the blend of filaments 12, which includes the first, and second filaments 14, and 16, respectively is twisted together in a conventional manner to form a twisted yarn 20.
- the number of the first, and second filaments, 14, and 16 twisted together to form the twisted yarn 20 is not limited.
- a plurality of twisted yarns 20 is, then in turn, braided together in a conventional manner to from a braided strand 22.
- the number of twisted yarns 20 braided together to form the strand 22 is not limited.
- a plurality of braided strands is, subsequently, braided together in a conventional manner to form the rope 10.
- the number of braided strands 22 to form the rope 10 is not limited.
- the blend of filaments 12, which includes first filament 14, second filament 16, and third filament is twisted together in a conventional manner to form a twisted yarn 20.
- the number of the first filament 14, second filament 16, and third filament twisted together to form the twisted yarn 20 is not limited.
- a plurality of twisted yarns 20 is, then in turn, braided together in a conventional manner to from a braided strand 22.
- the number of twisted yarns 20 braided together to form the strand 22 is not limited.
- a plurality of braided strands is, subsequently, braided together in a conventional manner to form the rope 10.
- the number of braided strands 22 to form the rope 10 is not limited.
- the blend of filaments 12, which includes the first, and second filaments 14, and 16, respectively, is twisted together in a conventional manner to form a twisted yarn 20a.
- the number of the first, and second filaments, 14, and 16 twisted together to form the twisted yarn 20 is not limited.
- a plurality of the twisted yarns 20a is, then in turn, twisted together in a conventional manner to from a twisted strand 22a.
- the number of twisted yarns 20 twisted together to form the strand 22a is not limited.
- a plurality of twisted strands 22a is, subsequently, twisted together in a conventional manner to form the rope 10a.
- the number of twisted strands 22a to form the rope 10a is not limited.
- the blend of filaments 12, which includes the first filament 14, second filament 16, and third filament is twisted together in a conventional manner to form a twisted yarn 20a.
- the number of the first filament 14, second filament 16, and third filament twisted together to form the twisted yarn 20 is not limited.
- a plurality of the twisted yarns 20a is, then in turn, twisted together in a conventional manner to from a twisted strand 22a.
- the number of twisted yarns 20 twisted together to form the strand 22a is not limited.
- a plurality of twisted strands 22a is, subsequently, twisted together in a conventional manner to form the rope 10a.
- the number of twisted strands 22a to form the rope 10a is not limited.
- the blend of filaments 12, which includes the first, and second filaments 14, and 16, respectively, is aligned in a substantially parallel relation to each other, and then compacted under tension to form a core 24.
- the number of the first, and second filaments, 14, and 16 aligned and compacted together to form the core 24 is not limited.
- the Core 24 is, subsequently, covered by a covering 26.
- the covering 26 may include, but is not limited to, a synthetic polymer based product.
- the blend of filaments 12, which includes the first filament 14, second filament 16, and third filament is aligned in a substantially parallel relation to each other, and then compacted under tension to form a core 24.
- the number of the first filament 14, second filament 16, and third filament aligned and compacted together to form the core 24 is not limited.
- the Core 24 is, subsequently, covered by a covering 26.
- the covering 26 may include, but is not limited to, a synthetic polymer based product,
- Rope sample numbers 1-12 were prepared, and evaluated for their bend-over-sheave cycle fatigue (fatigue life) .
- Rope sample 1-12 had the following compositions as shown in Table I. The testing conditions are shown in Table II, and the fatigue life of rope samples 1-12 is shown in Table III.
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Abstract
The instant invention is a rope. This rope includes a blend of filaments including a first filament, and a second filament. The second filament is fluorocarbon polymer filament.
Description
Docket No. 2008.4
A ROPE Field of Invention
The instant application relates to a rope for various types of applications including, but not limited to, heavy lifting or mooring applications, such as marine, oceanographic, offshore oil and gas, seismic, and industrial applications.
Background of the Invention
The use of ropes in various applications is widely known. Generally, a rope may be a stout cord made of strands of natural or artificial fibers twisted or braided together, or in the alternative, a rope may be a cord having a wire core with fiber strands braided around it .
Different factors must be considered in order to prevent rope failure. These factors include, but are not limited to, rope construction methods, fiber selections, and service conditions. Rope failure may be caused by different damage mechanism, e.g. frictional heat generated within the rope, or self-abrasion. The frictional heat generated within a rope may be caused by the bending mechanism; or in the alternative, it may be cause by the rope rubbing against a drum, a pulley, or a sheave. The frictional heat generated within a rope can be great enough to cause a
W catastrophic failure of the rope. This problem is particularly evident when the fiber material looses a substantial amount of strength, i.e. becoming susceptible to creep rupture, when heated above ambient temperature.
Different techniques have been employed to improve rope strength. For example, jacketing the subropes (or strands) is employed to reduce self-abrasion since it is widely known that the primary occurrence of self-abrasion is at the intersection between the subropes. Jacketing refers to the placement of a sleeve material (e.g., woven or braided fabric) over the subrope, so that the jacket is sacrificed to save the subrope. These jackets, however, add to the overall diameter, weight, and cost of the rope without any appreciable increase in the rope's strength. The larger size is obviously undesirable because it would require larger drums, pulleys, or sheaves to handle the jacketed rope. In addition, rope jackets make visual inspection of the rope core fibers problematic because the jacket hides the core fibers. Therefore, while this solution may be viable, it is considered unsatisfactory.
U.S. Patent No. 5,931,076 discloses a method for construction of a large diameter braided rope. The rope is formed of high strength, low elongation synthetic fibers that are twisted together
at a twist factor in the range from about 125 to about 145 to form a plurality of comparatively small diameter yarns. The small diameter twisted yarns are then braided together at a pick multiplier in the range from about 1.0 to about 2.0 so as to form a plurality of braided strands, and the strands, in turn, are braided together with a pick multiplier of about 2.0 to about 3.6 so as to form the large diameter braided rope.
U.S. Patent No. 5,901,632 discloses a method for forming a braided rope. Twisted yarns are first braided together to form braided strands, and the braided strands are then braided together to form a rope .
U.S. Patent No. 4,534,163 discloses a synthetic rope or cable. In making the synthetic fiber rope or cable, a plurality of filaments are brought in parallel into a core and compacted by a plurality of ribbons or tapes wound about the core under tension in opposite directions to form a uniform jacket that is torsionally stable. An outer sheath which may be urethane or other plastic material is applied to the jacket under sufficient pressure to penetrate the jacket but not the core, and then the urethane is cured. This rope or cable has a core of substantially parallel filaments free to move within the jacket of ribbons wound about the core and penetrated with urethane or other plastic material .
U.S. Patent Application publication No. US 2004/0069132 discloses a large diameter rope having improved fatigue life on a sheave, pulley, or drum. The rope includes a blend of HMPE filaments and liquid crystal polymer filaments selected from the group of lyotropic polymer filaments and thermoplastic polymer filaments. The rope may be constructed as a braided rope, a wire- lay rope, or a parallel core rope.
Despite the extensive levels of activity and research efforts in developing ropes with high strength for different applications, there is a still a need for a new rope with high strength, low risk of failure, and free of jackets on the subropes or completed ropes. Additionally, the new rope should be suitable for a wide range of applications .
Summary of the Invention
The instant invention is a rope. This rope includes a blend of filaments including a first filament, and a second filament. The second filament is a fluorocarbon polymer filament.
Brief Description of the Drawings
For the purpose of illustrating the invention, there is shown in the drawings a form that is presently preferred; it being
understood, however, that this invention is not limited to the
precise arrangements and instrumentalities shown.
Fig. IA is an elevational view of a length of a first embodiment of a rope made according to the present invention;
Fig. IB is an elevational view of a length of a twisted yarn of the rope of Fig. IA;
Fig. 1C is an elevational view of a length of a braided strand of the rope of Fig. IA;
Fig. ID is an exploded view of an end portion of the first embodiment of the rope of Fig. IA, schematically illustrating the manner in which twisted yarns are braided together to form braided strands which are then braided together to form the rope of Fig. IA;
Fig. 2A is an elevational view of a length of a second embodiment of a rope made according to the present invention;
Fig. 2B is an elevational view of a length of a twisted strand of the rope of Fig. 2A;
Fig. 2C is an elevational view of a length of a twisted yarn of the rope of Fig. 2A;
Fig. 2D is an exploded view of an end portion of a second embodiment of a rope made according to the present invention, schematically illustrating the manner in which twisted yarns are
twisted together to form twisted strands which are then twisted together to form a rope;
Pig. 3A is an elevational view of a length of a third embodiment of a rope made according to the present invention, schematically illustrating the manner in which the rope is made; and
Fig. 3B is a cross sectional view of the rope of Fig. 3A along the lines 3b-3b.
Detailed Description of the Invention
Referring to the drawings wherein like numerals indicate like elements, there is shown, in Figs. IA - ID, a first exemplary embodiment of a rope 10 according to the instant invention. This rope 10 includes a blend of filaments 12. Blend of filaments 12 includes a first filament 14, and a second filament 16. Blend of filaments 12 may further include a third filament (not shown) .
First filament 14 may be any high strength filament. For example, first filaments 14 may be high modulus polyethylene filaments ("HMPE") that are spun from ultrahigh molecular weight polyethylene ("UHMWPE") resin. HMPE filaments are commercially available under the tradename of SPECTRA® from Honeywell Performance Fibers of Colonial Heights, VA, and DYNEEMA® from DSM
NV of Heerlen, The Netherlands, and Toyobo Company Ltd. of Osaka, Japan. In the alternative, the first filament 14 may be a liquid crystal polymer (LCP) filament selected from the group consisting of lyotropic polymer filament and thermotropic polymer filament . Lyotropic polymers decompose before melting but form liquid crystals in solution under appropriate conditions (these polymers are solution spun) . Lyotropic polymer filaments include, for example, aramid and polyphenylene benzobisoxazole (PBO) fibers. Aramid filaments are commercially available under the tradename KEVLAR® from Dupont of Wilmington, DE, TECHNORA® from Teijin Ltd. of Osaka, Japan, and TWARON® from Teijin Twaron BV of Arnhem, The Netherlands. PBO fibers are commercially available under the tradename ZYLON® from Toyobo Company Ltd. of Osaka, Japan. Thermotropic polymers exhibit liquid crystal formation in melt form. Thermotropic filaments are commercially available under the tradename VECTRAN® from Celanese Advanced Materials, Inc. of Charlotte, NC. The first filaments 14 may constitute between about 1 to 99 percent volume of the blend 12.
The second filament 16 may be any filament. For example, second filament 16 may be a fluorocarbon polymer. An example of fluorocarbon polymer includes, but is not limited to, poly (tetrafluoroethylene) ("PTFE") . PTFE fibers filaments are commercially available from W. L. Gore & Associates, Inc. of Newark,
DE and Elkton, MD. The second filaments 16 may constitute between about 1 to 40 percent volume of the blend 12.
The third filament (not shown) may be any high strength filament. For example, third filaments may be high modulus polyethylene filaments ("HMPE") that are spun from ultrahigh molecular weight polyethylene ("UHMWPE") resin. HMPE filaments are commercially available under the tradename of SPECTRA® from Honeywell Performance Fibers of Colonial Heights, VA, and DYNEEMA® from DSM NV of Heerlen, The Netherlands, and Toyobo Company Ltd. of Osaka, Japan. In the alternative, the third filament (not shown) may be a liquid crystal polymer (LCP) filament selected from the group consisting of lyotropic polymer filament and thermotropic polymer filament . Lyotropic polymers decompose before melting but form liquid crystals in solution under appropriate conditions
(these polymers are solution spun) . Lyotropic polymer filaments include, for example, aramid and polyphenylene benzobisoxazole
(PBO) fibers. Aramid filaments are commercially available under the tradename KEVLAR® from Dupont of Wilmington, DE, TECHNORA® from Teijin Ltd. of Osaka, Japan, and TWARON® from Teijin Twaron BV of Arnhem, The Netherlands. PBO fibers are commercially available under the tradename ZYLON® from Toyobo Company Ltd. of Osaka, Japan. Thermotropic polymers exhibit liquid crystal formation in melt form. Thermotropic filaments are commercially available under
the tradename VECTRAJST® from Celanese Advanced Materials, Inc. of Charlotte, NC. The third filaments may constitute between about 1 to 99 percent volume of the blend 12.
Rope 10 may further include a coating. It is believed, but the invention should not be so limited, that the coating improves upon the abrasion resistance of the blend 12. The coating may be any coating. The coating may, for example, be a synthetic polymer based product. For example, the coating may be a polyurethane coating. Rope 10 may have any amount of coating. Coating may be applied to rope 10 via known conventional methods, which includes but is not limited to, impregnating rope 10 with coating by soaking rope 10 in the coating.
Rope 10 may have different rope constructions. For example, rope 10 may have a rope construction selected from the group consisting of a braided rope construction, wire-lay rope construction, and parallel core rope construction.
In the manufacture of the rope 10, well-known techniques for making ropes are used. Such methods are further disclosed in U.S. Patent Nos . 4,534,163 , 5,931,076, and 5,901,632 incorporated herein by reference .
In construction of the first embodiment of rope 10, referring to Fig. IA - ID, the blend of filaments 12, which includes the first, and second filaments 14, and 16, respectively, is twisted together in a conventional manner to form a twisted yarn 20. The number of the first, and second filaments, 14, and 16 twisted together to form the twisted yarn 20 is not limited. Referring to Fig, Ic, a plurality of twisted yarns 20 is, then in turn, braided together in a conventional manner to from a braided strand 22. The number of twisted yarns 20 braided together to form the strand 22 is not limited. A plurality of braided strands is, subsequently, braided together in a conventional manner to form the rope 10. The number of braided strands 22 to form the rope 10 is not limited.
In an alternative construction of the first embodiment of rope 10, the blend of filaments 12, which includes first filament 14, second filament 16, and third filament (not shown) is twisted together in a conventional manner to form a twisted yarn 20. The number of the first filament 14, second filament 16, and third filament twisted together to form the twisted yarn 20 is not limited. Referring to Fig, Ic, a plurality of twisted yarns 20 is, then in turn, braided together in a conventional manner to from a braided strand 22. The number of twisted yarns 20 braided together to form the strand 22 is not limited. A plurality of braided strands is, subsequently, braided together in a conventional manner
to form the rope 10. The number of braided strands 22 to form the rope 10 is not limited.
In construction of the second embodiment of rope 10, referring to Fig. 2A - 2D, the blend of filaments 12, which includes the first, and second filaments 14, and 16, respectively, is twisted together in a conventional manner to form a twisted yarn 20a. The number of the first, and second filaments, 14, and 16 twisted together to form the twisted yarn 20 is not limited. A plurality of the twisted yarns 20a is, then in turn, twisted together in a conventional manner to from a twisted strand 22a. The number of twisted yarns 20 twisted together to form the strand 22a is not limited. A plurality of twisted strands 22a is, subsequently, twisted together in a conventional manner to form the rope 10a. The number of twisted strands 22a to form the rope 10a is not limited.
In an alternative construction of the second embodiment of rope 10, the blend of filaments 12, which includes the first filament 14, second filament 16, and third filament (not shown) is twisted together in a conventional manner to form a twisted yarn 20a. The number of the first filament 14, second filament 16, and third filament twisted together to form the twisted yarn 20 is not limited. A plurality of the twisted yarns 20a is, then in turn,
twisted together in a conventional manner to from a twisted strand 22a. The number of twisted yarns 20 twisted together to form the strand 22a is not limited. A plurality of twisted strands 22a is, subsequently, twisted together in a conventional manner to form the rope 10a. The number of twisted strands 22a to form the rope 10a is not limited.
In construction of the third embodiment of rope 10, referring to Fig. 3A - 3B, the blend of filaments 12, which includes the first, and second filaments 14, and 16, respectively, is aligned in a substantially parallel relation to each other, and then compacted under tension to form a core 24. The number of the first, and second filaments, 14, and 16 aligned and compacted together to form the core 24 is not limited. The Core 24 is, subsequently, covered by a covering 26. The covering 26 may include, but is not limited to, a synthetic polymer based product.
In an alternative construction of the third embodiment of rope 10, the blend of filaments 12, which includes the first filament 14, second filament 16, and third filament (not shown) is aligned in a substantially parallel relation to each other, and then compacted under tension to form a core 24. The number of the first filament 14, second filament 16, and third filament aligned and compacted together to form the core 24 is not limited. The Core 24
is, subsequently, covered by a covering 26. The covering 26 may include, but is not limited to, a synthetic polymer based product,
Rope sample numbers 1-12 were prepared, and evaluated for their bend-over-sheave cycle fatigue (fatigue life) . Rope sample 1-12 had the following compositions as shown in Table I. The testing conditions are shown in Table II, and the fatigue life of rope samples 1-12 is shown in Table III.
Table I
Table III
Claims
1 . A rope comprising : a blend of filaments comprising; a first filament, and a second filament, said second filament being a fluorocarbon polymer filament.
2. The rope according to Claim 1, where in said first filament being a high molecular weight polyethylene filament .
3. The rope according to Claim 2, wherein said rope further comprising a coating.
4. The rope according to Claim 3, wherein said coating being polyurethane .
5. The rope according to Claim 2, wherein said blend of filament further comprising a third filament, said third filament being a high strength filament selected from the group consisting of lyotropic polymer filaments and thermotropic polymer filaments.
6. The rope according to Claim 1, where in said first filament being a high strength filament selected from the group consisting of lyotropic polymer filaments and thermotropic polymer filaments .
7. The rope according to Claim 6, wherein said blend of filament further comprising a third filament, said third filament being a high molecular weight polyethylene filament .
8. The rope according to Claims 1, wherein said rope having a rope construction selected from the group consisting of a braided rope construction, wire-lay rope construction, and parallel core rope construction.
9. The rope according to Claims 1, wherein said fluorocarbon polymer filament being a poly (tetrafluoroethylene) filament.
10. The rope according to Claim 1, wherein said first, and second filaments being twisted together to form a plurality of twisted yarns, said plurality of twisted yarns being braided together to form a plurality of braided strands, and said plurality of strands being braided together to form said rope.
11. The rope according to Claim 1, wherein said first, and second filaments being twisted together to form a plurality of twisted yarns, said plurality of twisted yarns being twisted together to form a plurality of twisted strands, and said plurality of strands being twisted together to form said rope.
12. The rope according to Claim 1, wherein said first, and second filaments forming a core, and said core being covered by a cover .
13. A method for improving fatigue life of a rope on a sheave, a pulley, or a drum comprising the steps of: providing a first filament; providing a second filament, said second filament being poly (tetrafluoroethylene) filament; twisting said first, and second filaments together thereby forming a plurality of twisted yarns; braiding said plurality of twisted yarns together thereby forming a plurality of braided strands; braiding said plurality of twisted strands together thereby forming a rope having an improved fatigue life on a sheave, a pulley, or a drum.
14. The method according to Claim 13, wherein said first filament being a high molecular weight polyethylene filament .
15. The method according to Claim 14, wherein said method further including the step of providing a third filament subsequent to the step of providing a second filament, and twisting said first, second, and third filaments together thereby forming a plurality of twisted yarns.
16. The method according to Claim 15, wherein said third filament being a high strength filament selected from the group consisting of lyotropic polymer filaments and thermotropic polymer filaments .
17. The method according to Claim 13, wherein said first filament being a high strength filament selected from the group consisting of lyotropic polymer filaments and thermotropic polymer filaments.
18. The method according to Claim 17, wherein said method further including the step of providing a third filament subsequent to the step of providing a second filament, and twisting said first, second, and third filaments together thereby forming a plurality of twisted yarns.
19. The method according to Claim 18, wherein said third filament being a high molecular weight polyethylene filament.
20. A method for improving fatigue life of a rope on a sheave, a pulley, or a drum comprising the steps of: providing a first filament; providing a second filament, said second filament being a poly (tetrafluoroethylene) filament ; twisting said first, and second filaments together thereby forming a plurality of twisted yarns; twisting said plurality of twisted yarns together thereby forming a plurality of twisted strands; twisting said plurality of twisted strands together thereby forming a rope having an improved fatigue life on a sheave, a pulley, or a drum.
21. The method according to Claim 20, wherein said first filament being a high molecular weight polyethylene filament.
22. The method according to Claim 21, wherein said method further including the step of providing a third filament subsequent to the step of providing a second filament, and twisting said first, second, and third filaments together thereby forming a plurality of twisted yarns.
23. The method according to Claim 22, wherein said third filament being a high strength filament selected from the group consisting of lyotropic polymer filaments and thermotropic polymer filaments .
24. The method according to Claim 20, wherein said first filament being a high strength filament selected from the group consisting of lyotropic polymer filaments and thermotropic polymer filaments .
25. The method according to Claim 24, wherein said method further including the step of providing a third filament subsequent to the step of providing a second filament, and twisting said first, second, and third filaments together thereby forming a plurality of twisted yarns.
26. The method according to Claim 25, wherein said third filament being a high molecular weight polyethylene filament.
27. A method for improving fatigue life of a rope on a sheave, a pulley, or a drum comprising the steps of: providing a first filament; providing a second filament, said second filament being a poly (tetrafluoroethylene) filament; aligning said first, and second filaments in a substantially parallel relation to each other; compacting said aligned first, and second filaments under tension; thereby forming a core; providing a cover; covering said core with said cover; thereby forming said rope .
28. The method according to Claim 27, wherein said first filament being a high molecular weight polyethylene filament .
29. The method according to Claim 28, wherein said method further including the step of providing a third filament subsequent to the step of providing a second filament, aligning said first, second, and third filaments in a substantially parallel relation to each other, and compacting said aligned first, second, and third filaments under tension.
30. The method according to Claim 29, wherein said third filament being a high strength filament selected from the group consisting of lyotropic polymer filaments and thermotropic polymer filaments .
31. The method according to Claim 27, wherein said first filament being a high strength filament selected from the group consisting of lyotropic polymer filaments and thermotropic polymer filaments .
32. The method according to Claim 31, wherein said method further including the step of providing a third filament subsequent to the step of providing a second filament, aligning said first, second, and third filaments in a substantially parallel relation to each other, and compacting said aligned first, second, and third filaments under tension.
33. The method according to Claim 32, wherein said third filament being a high molecular weight polyethylene filament .
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US11/081,112 | 2005-03-16 | ||
US11/081,112 US20060207414A1 (en) | 2005-03-16 | 2005-03-16 | Rope |
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WO2006101723A1 true WO2006101723A1 (en) | 2006-09-28 |
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PCT/US2006/008091 WO2006101723A1 (en) | 2005-03-16 | 2006-03-07 | A rope |
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WO (1) | WO2006101723A1 (en) |
Cited By (1)
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WO2010084520A1 (en) | 2009-01-23 | 2010-07-29 | Sequoia Automation S.R.L. | Tether for tropospheric aeolian generator |
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JP5165579B2 (en) * | 2005-12-02 | 2013-03-21 | ディーエスエム アイピー アセッツ ビー.ブイ. | Rope containing high-performance polyethylene fiber |
AU2006335800B2 (en) * | 2006-01-23 | 2012-06-14 | Yoz-Ami Corporation | Colored yarn object, process for producing the same, and fishing line |
US8709562B2 (en) * | 2007-08-21 | 2014-04-29 | Honeywell International, Inc. | Hybrid fiber constructions to mitigate creep in composites |
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ITMI20091999A1 (en) * | 2009-11-13 | 2011-05-14 | Gottifredi Maffioli S P A | CABLE IN SYNTHETIC FIBERS FOR STRUCTURAL TIE AND RELATIVE METHOD OF REALIZATION |
ES2713440T3 (en) * | 2013-01-14 | 2019-05-21 | Actuant Corp | Rope with low friction strand |
NO20141103A1 (en) * | 2014-09-12 | 2016-03-14 | Offshore & Trawl Supply As | Streamlining cover in protective sheath for an elongated, load-bearing body |
EP3325710B1 (en) * | 2015-07-22 | 2023-01-11 | Teufelberger Fiber Rope GmbH | Rope made of textile fibre material |
CN105350363A (en) * | 2015-11-23 | 2016-02-24 | 江苏赛福天钢索股份有限公司 | Rope core for steel wire rope and preparation method of rope core |
EP3287563B1 (en) * | 2016-06-21 | 2020-08-05 | National Institute of Advanced Industrial Science and Technology | Rope and manufacturing method therefor |
USD818545S1 (en) * | 2016-10-20 | 2018-05-22 | Exemplar Design, Llc | Jump rope |
USD827059S1 (en) * | 2016-10-20 | 2018-08-28 | Exemplar Design, Llc | Jump rope |
AU2020382824A1 (en) * | 2019-11-12 | 2022-03-10 | Cortland Industrial LLC | Synthetic fiber ropes with low-creep HMPE fibers |
EP4185747A1 (en) | 2020-07-24 | 2023-05-31 | Kuraray Co., Ltd. | Rope |
CN112127043B (en) * | 2020-09-30 | 2024-02-02 | 山东鲁普科技有限公司 | Chemical fiber rope with wear resistance and sharp corner resistance for high-altitude operation and manufacturing method thereof |
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