Classifications

• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B1/00—Constructional features of ropes or cables
  • D07B1/18—Grommets
  • D07B1/185—Grommets characterised by the eye construction
• • 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
  • D07B9/00—Binding or sealing ends, e.g. to prevent unravelling
• • 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
  • D07B2201/102—Rope or cable structures characterised by their internal structure including a core
• • 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
  • D07B2201/2001—Wires or filaments
  • D07B2201/2002—Wires or filaments characterised by their cross-sectional shape
  • D07B2201/2003—Wires or filaments characterised by their cross-sectional shape flat
• • 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
  • D07B2201/2001—Wires or filaments
  • D07B2201/2009—Wires or filaments 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
  • D07B2201/2047—Cores
  • D07B2201/2052—Cores characterised by their structure
  • D07B2201/2065—Cores characterised by their structure comprising a coating
• • 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
  • D07B2201/2092—Jackets or coverings characterised by the materials used
• • 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
• • 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
  • D07B2401/2055—Improving load capacity
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2501/00—Application field
  • D07B2501/20—Application field related to ropes or cables
  • D07B2501/2015—Construction industries
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2501/00—Application field
  • D07B2501/20—Application field related to ropes or cables
  • D07B2501/2061—Ship moorings

Definitions

• the invention relates in general to a synthetic fiber rope and in particular to a synthetic fiber rope with a spliced termination and a production method thereof.
• Synthetic fiber ropes may for example be used in hoisting and pulling operations, for example as crane cables, in deep see installation, marine and off-shore mooring, commercial fishing, for example as warp lines for nets, and in mining operations.
• Existing synthetic fiber rope solutions for the applications in hoisting and pulling have generally utilised braided rope constructions partially or entirely made from high modulus polyethylene
• HMPE HMPE Due to strand crossovers, followed by lower packing factors and lower radial stability, such constructions may have intrinsically inferior performance properties, e.g., lower strength and inferior fatigue life.
• the use of braided constructions has also tended to limit material choices to HMPE, liquid crystal polymer (LCP) or HMPE/LCP blends since the internal abrasion generated by the strand cross-over in braided constructions may not be optimal for aramid materials and lead to premature failure compared with a braided HMPE rope.
• LCP liquid crystal polymer
• HMPE/LCP blends HMPE/LCP blends since the internal abrasion generated by the strand cross-over in braided constructions may not be optimal for aramid materials and lead to premature failure compared with a braided HMPE rope.
• non-load bearing central cores e.g. continuous filament polyester bundles or extruded polyurethane
• the object of the present invention is to provide a synthetic fiber rope having a laid construction and a strong and stable splice-type termination.
• Another object of the present invention is to provide a method of making a strong and stable splice termination for a synthetic fiber rope with laid construction.
• the present invention provides a synthetic fiber rope comprising a fiber core and at least a layer of synthetic fiber strands twisted around said fiber core.
• the synthetic fiber rope has a splice-type termination and said splice-type termination comprises
• the spliced rope section being made by tucking a number of bundled tails of the synthetic fiber rope respectively through between the synthetic fiber strands of the outer layer of the synthetic fiber rope.
• the synthetic fiber rope of the invention comprises all types of synthetic fibers material.
• fibers are nylon or polyamide fibers, polyester fibers, polyolefin fibers such as polypropylene and polyethylene fibers, and particularly high strength synthetic fibers such as high strength polypropylene (HSSP), high modulus polyethylene (HMPE), ultra high molecular weight polyethylene (UHMwPE), para-aramid fibers such as poly(P-phenylene terephthalamide) (PPTA) fibers, liquid crystal polyester (LCP/LCAP), poly(P-phenylene-2,6-benzobisoxazole) (PBO), meta-aramid fibers such as poly (m-phenylene isophthalamide fibers, copolyamide fibers of (terephthaloyl chloride, P-phenylenediamine, 3,4'-diaminodiphenyl ether), normally referred to as "copolymer aramid").
• the polymer materials may be present not only in fiber format but also in other longitudinal format
• the number of tails of the synthetic fiber rope preferably equals the number of synthetic fiber strands at the outer layer of the synthetic fiber rope.
• the synthetic fiber rope has two layers, and the tails of synthetic fiber rope is made by dividing and bundling up the core and two layers yarns equally amongst the number of strands of the outer layer of the synthetic fiber rope.
• the synthetic fiber rope has three layers, and the tails of synthetic fiber rope is made by dividing and bundling up the core, the layer one, layer two and layer three yarns equally amongst the number of strands of the outer layer of the synthetic fiber rope.
• layer three is the outer layer of the synthetic fiber rope.
• the synthetic fiber rope can have four layers, and the tails of synthetic fiber rope is made by dividing and bundling the core, the layer one, layer two and layer three yarns equally amongst the number of layer four strands.
• the synthetic fiber rope its fiber core may be covered by a polymer coating.
• the fiber core of the synthetic fiber rope is a laid or braided synthetic fiber strand, and the at least a layer of synthetic fiber strands comprise a first layer and a second layer, wherein, said first layer preferably has at least six first synthetic fiber strands laid in a first direction surround said polymer layer, and said second layer preferably has at least twelve second synthetic fiber strands laid in a second direction surround said first layer.
• a method of making a splice termination for a synthetic fiber rope having a laid construction wherein the synthetic fiber rope comprises a fiber core and at least a layer of synthetic fiber strands twisted around said fiber core.
• the method comprises the following steps:
• said fiber core can be coated with a polymer coating and then said step (d) includes a step of removing said polymer coating, e.g., via knife or hot melting.
• the synthetic fiber rope has two layers, and step (d) comprises of dividing and bundling up the core and two layers yarns equally amongst the number of strands of the outer layer of the synthetic fiber rope.
• the synthetic fiber rope has three layers, and step (d) comprises of dividing and bundling up the core, the layer one, layer two and layer three yarns equally amongst the number of strands of the outer layer of the synthetic fiber rope.
• layer three is the outer layer of the synthetic fiber rope.
• the synthetic fiber rope can have four layers and step (d) comprises of dividing and bundling up the core, the layer one, layer two and layer three yarns equally amongst the number of layer four strands.
• the method of the invention can further comprise step (g) removing a part of the yarn content on each step of the tucks for a plurality of tapers.
• the synthetic fiber rope with a spliced termination of the invention has made by a short length of a synthetic fiber rope. This is one of the advantages of the splice according to the invention over others, especially over splice of braided synthetic fiber ropes.
• the spliced termination and in particular the tucking section has a compact diameter. More importantly, the spliced termination according to the present invention has a high strength or breaking load. The splicing process can be done even manually by skilled person offshore or on site.
• FIG. 1-5 illustrate step-by-step schematic of a splicing method according to the present invention.
• FIG. 5 illustrates a final schematic view of a splice of a synthetic fiber rope in accordance with the present invention
• the present embodiment of the invention is directed to a synthetic fiber rope having a polymer extruded core and multi-strand.
• the synthetic rope in the example has a rope construction of 5-8-8-24, i.e. , the outer layer of the synthetic rope having 24 strands, layer two having 8 strands, layer one having 8 strands and the core having 5 strands.
• the synthetic fiber rope has three layers outside the core.
• the synthetic rope has a diameter of 88 mm.
• measure tails having a length of L1 from the end of the synthetic rope 10, tying a clove hitch 12 at this point if needed.
• L2 is preferably to be calculated so that each side of the eye does not exceed an angle of 30° and preferably not exceed an angle of 15°.
• Mark the tucking pitch 16 of splice. Apply cloth or tape, e.g. HMPE, on the synthetic fiber rope between the two clove hitches 12,14, which denote the eye to form a taped section.
• Form eye 22 by passing tails to the right-hand side as illustrated in Fig. 2.
• tie both legs together with a third clove hitch so that the previous two clove hitches line up, forming the eye (not shown in Fig. 2).
• Such third clove hitch can also increase the cohesive force of the tucking section since it exerts a normal compression force in the tucking section.
• the extruded layer can be removed, e.g., using a hot knife.
• the of the synthetic rope 30 is extruded by a polymer layer 34.
• the extrusion shall be cut out as close to the eye as possible.
• the strands of layer three are broken down into yarns across the core, layer one and layer two and generate, e.g., 54 yarns.
• tucking and pulling the plurality of tapped tail(s) 42 respectively through respective strand(s) of the outer layer of the synthetic fiber rope next to the taped section 44 For instance, take a strand on the standing part at about “10 o’clock” on the rope and insert e.g. a Swedish fid. On the tails, choose a grouping of yarns/strand that is at about “9 o’clock” of the respective part of the rope. Loosely pull this strand underneath the strand on the standing part of the rope. Take the strand above on the standing part of the rope, insert fid, and pull through the next tail, ensuring that it exits at the pitch mark. Repeat this for all top grouped tails.
• the finished product is illustrated in Fig. 5.
• the amount of yarns are reduced at the last few tucks to form a taper region 52.
• the tapering remove e.g. a sixth of the yarn content on each step of the tucks for five tapers.
• Product may require a braiding over the top of the outboard end of the rope, depending on design.

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• 2022
  • 2022-04-12 WO PCT/EP2022/059686 patent/WO2022223360A1/en active Application Filing
  • 2022-04-12 CN CN202280028911.8A patent/CN117222792A/zh active Pending
  • 2022-04-12 EP EP22722446.6A patent/EP4326941A1/en active Pending
  • 2022-04-12 US US18/285,454 patent/US20240183105A1/en active Pending

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