WO2016142425A1 - Multiple synthetic material mooring rope and production process - Google Patents

Multiple synthetic material mooring rope and production process Download PDF

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Publication number
WO2016142425A1
WO2016142425A1 PCT/EP2016/055025 EP2016055025W WO2016142425A1 WO 2016142425 A1 WO2016142425 A1 WO 2016142425A1 EP 2016055025 W EP2016055025 W EP 2016055025W WO 2016142425 A1 WO2016142425 A1 WO 2016142425A1
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WO
WIPO (PCT)
Prior art keywords
rope
mooring
strands
core
mooring rope
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2016/055025
Other languages
French (fr)
Inventor
Karel DEVOS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bexco NV
Original Assignee
Bexco NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bexco NV filed Critical Bexco NV
Publication of WO2016142425A1 publication Critical patent/WO2016142425A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • D07B1/025—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
    • D07B2201/104—Rope or cable structures twisted
    • 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
    • D07B2201/2047—Cores
    • D07B2201/2067—Cores characterised by the elongation or tension behaviour
    • 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
    • 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
    • D07B2205/30—Inorganic materials
    • D07B2205/301—Ceramics
    • 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
    • D07B2401/2005—Elongation or elasticity
    • 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 present invention concerns a mooring rope comprising two different types of synthetic materials which provide the mooring rope with a larger diameter and greater wear resistance without causing the strength of the rope to increase.
  • the invention concerns a mooring rope comprising a plurality of rope strands, wherein each strand has a core comprising primarily of polypropylene with rope yarns comprising HMPE twisted around it.
  • the invention also comprises the production process for manufacturing such mooring ropes.
  • Mooring ropes composed of various synthetic fibres are used in mooring of ships.
  • the synthetic materials most commonly used for mooring ropes are polyester, polyamide, polypropylene and HMPE (high molecular weight polyethylene). In general, these synthetic materials are durable and have an optimal strength/price ratio.
  • Such mooring ropes are much lighter, much easier to handle and show less snapback after breakage, which makes them safer for the crew of a ship.
  • the structure of current mooring ropes constitutes a twisted, braided or plaited construction of subropes, also referred to as strands, wherein the subropes absorb the entire force together.
  • suitable subropes include a twisted bundle of rope yarns, 3 or 4-strand twisted rope, a 6+1 -strand twisted rope or an 8-strand or 12-strand rope.
  • Various types of synthetic materials are used in mooring rope as the rope yarn making up the subropes or strands.
  • Mooring ropes are susceptible to wear, in particular due to contact with winches, guides, pulleys, fairlead rollers and chocks. In particular, if the angle of contact with the guide is smaller, the pressure at the point of contact with the mooring rope is increased, causing wear.
  • various types of synthetic materials are already used in manufacturing mooring ropes, but these solutions appear to be unsatisfactory with respect to the useful life of mooring ropes.
  • Another solution in use is that of plaiting the mooring rope so as to make it rounder, more stable and more compact, with fewer irregularities on the rope surface. However, this solution also appears unsatisfactory for increasing wear resistance.
  • the invention concerns a mooring rope with strands whose core is filled with rope yarn having lower tensile strength and elongation at break compared to HMPE yarns.
  • This invention provides a larger diameter, which has a positive effect on wear resistance without increasing the strength of the rope.
  • the mooring rope of the invention comprises a plurality of strands of synthetic materials, wherein the rope yarns of the strands are twisted around a core comprising rope yarn having lower tensile strength and greater elongation at break compared to the rope yarn of the strands.
  • the rope yarns of the strands may comprise synthetic fibres having high tensile strength and low elongation at break, such as e.g. HMPE, aramids, para-aramids, LCP or ceramic fibres.
  • the invention concerns a mooring rope with a plurality of strands of synthetic materials wherein the core of these strands comprises a central polypropylene rope yarn enclosed by one or a plurality or layers of any more or less symmetrical combination of a rope yarn comprising polypropylene and a rope yarn comprising one of the following synthetic materials: HMPE, aramids, para-aramids, LCP or ceramic fibres.
  • such a mooring rope is characterized in that the layer or layers comprising the combination of rope yarn are also enclosed by one or a plurality or layers of rope yarn consisting entirely of HMPE, aramids, para-aramids, LCP or ceramic fibres, or some combination of these synthetic fibres.
  • the strands of the mooring rope of the invention in the outermost layer or layers of rope yarn consist entirely of HMPE, wherein the innermost layer or layers of rope yarn consist entirely of polypropylene.
  • the mooring rope comprises 3 or 4-strand twisted rope, or e.g. a 6+1 -strand twisted rope or an 8-strand or 12-strand rope.
  • the mooring rope of the invention comprises a 12- strand twisted rope.
  • the invention also comprises a mooring rope composed of 3, 4, 6+1, 8 or 12 twisted mooring ropes, wherein the composition of these mooring ropes is in accordance with any of the embodiments described above.
  • the mooring rope of the invention can be used for various maritime applications, but also for any application outside this field.
  • the mooring rope of the invention can be used for mooring ships.
  • the invention also comprises the production process for manufacturing the mooring ropes of the invention, wherein a production process known in the area of mooring ropes is used.
  • Fig. 1A An external view and cross-section of a mooring rope of the invention in a 3- strand embodiment.
  • Fig. IB An external view and cross-section of a mooring rope of the invention in a 6+1 -strand embodiment.
  • Fig. 1C An external view of a mooring rope of the invention in an 8-strand embodiment.
  • Fig. ID An external view and cross-section of a mooring rope of the invention in a 12- strand embodiment.
  • Fig. 2 An 8-strand mooring rope, wherein each strand has a core of polypropylene rope yam, eight polypropylene rope yarns twisted around said core, and 14 further HMPE rope yams also twisted around said core.
  • Fig. 3 A 12-strand mooring rope, wherein each strand has a core of polypropylene rope yam, four polypropylene rope yarns and four HMPE rope yams symmetrically twisted around said core, and 14 further HMPE rope yams also twisted around said core.
  • Fig. 4 A 6+1-strand mooring rope, wherein each strand has a core of polypropylene rope yarn, four polypropylene rope yarns and four HMPE rope yarns symmetrically twisted around said core, 14 further HMPE rope yams also twisted around said core, and a layer of HMPE rope yams also twisted around said core.
  • Fig. 5 A 4-strand mooring rope, wherein each strand has a core of polypropylene rope yams, eight polypropylene rope yarns twisted around said core, 14 further HMPE rope yams also twisted around said core, and a layer of HMPE rope yams also twisted around said core.
  • Fig. 6 A 12-strand mooring rope, wherein each strand has a core of polypropylene rope yams, two layers of polypropylene rope yarns twisted around said core, and two layers of HMPE rope yarns also twisted around said core.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Ropes Or Cables (AREA)

Abstract

A mooring rope comprising two different types of synthetic materials which provide the mooring rope with a larger diameter and greater wear resistance without causing the strength of the rope to increase. The mooring rope may comprise a plurality of rope strands, wherein each strand has a core comprising primarily polypropylene with high molecular weight polyethylene rope yarns twisted around it. The production process for manufacturing such mooring ropes is disclosed, too. Synthetic materials include liquid crystal polyester, aramid and ceramics.

Description

Multiple synthetic material mooring rope and production process
The present invention concerns a mooring rope comprising two different types of synthetic materials which provide the mooring rope with a larger diameter and greater wear resistance without causing the strength of the rope to increase. In particular, the invention concerns a mooring rope comprising a plurality of rope strands, wherein each strand has a core comprising primarily of polypropylene with rope yarns comprising HMPE twisted around it. The invention also comprises the production process for manufacturing such mooring ropes.
Prior art
Mooring ropes composed of various synthetic fibres are used in mooring of ships. The synthetic materials most commonly used for mooring ropes are polyester, polyamide, polypropylene and HMPE (high molecular weight polyethylene). In general, these synthetic materials are durable and have an optimal strength/price ratio. Such mooring ropes are much lighter, much easier to handle and show less snapback after breakage, which makes them safer for the crew of a ship. The structure of current mooring ropes constitutes a twisted, braided or plaited construction of subropes, also referred to as strands, wherein the subropes absorb the entire force together. Examples of suitable subropes include a twisted bundle of rope yarns, 3 or 4-strand twisted rope, a 6+1 -strand twisted rope or an 8-strand or 12-strand rope. Various types of synthetic materials are used in mooring rope as the rope yarn making up the subropes or strands.
Mooring ropes are susceptible to wear, in particular due to contact with winches, guides, pulleys, fairlead rollers and chocks. In particular, if the angle of contact with the guide is smaller, the pressure at the point of contact with the mooring rope is increased, causing wear. As a possible solution, various types of synthetic materials are already used in manufacturing mooring ropes, but these solutions appear to be unsatisfactory with respect to the useful life of mooring ropes. Another solution in use is that of plaiting the mooring rope so as to make it rounder, more stable and more compact, with fewer irregularities on the rope surface. However, this solution also appears unsatisfactory for increasing wear resistance.
Description of the invention
The invention concerns a mooring rope with strands whose core is filled with rope yarn having lower tensile strength and elongation at break compared to HMPE yarns. This invention provides a larger diameter, which has a positive effect on wear resistance without increasing the strength of the rope.
The mooring rope of the invention comprises a plurality of strands of synthetic materials, wherein the rope yarns of the strands are twisted around a core comprising rope yarn having lower tensile strength and greater elongation at break compared to the rope yarn of the strands. The rope yarns of the strands may comprise synthetic fibres having high tensile strength and low elongation at break, such as e.g. HMPE, aramids, para-aramids, LCP or ceramic fibres.
In particular, the invention concerns a mooring rope with a plurality of strands of synthetic materials wherein the core of these strands comprises a central polypropylene rope yarn enclosed by one or a plurality or layers of any more or less symmetrical combination of a rope yarn comprising polypropylene and a rope yarn comprising one of the following synthetic materials: HMPE, aramids, para-aramids, LCP or ceramic fibres. Within the meaning of the invention, the term 'more or less symmetrical combination' is understood to mean that although the intention is to achieve a perfectly symmetrical combination, due to tolerance in the production process or normal use of the rope yarns, slight displacements may occur in the position of these yarns, and such a displaced embodiment must also be understood to fall within the scope of the various embodiments of the invention. In a preferred embodiment, such a mooring rope is characterized in that the layer or layers comprising the combination of rope yarn are also enclosed by one or a plurality or layers of rope yarn consisting entirely of HMPE, aramids, para-aramids, LCP or ceramic fibres, or some combination of these synthetic fibres. In a further preferred embodiment, the strands of the mooring rope of the invention in the outermost layer or layers of rope yarn consist entirely of HMPE, wherein the innermost layer or layers of rope yarn consist entirely of polypropylene. In a further preferred embodiment, the mooring rope comprises 3 or 4-strand twisted rope, or e.g. a 6+1 -strand twisted rope or an 8-strand or 12-strand rope. However, in a particularly preferred embodiment, the mooring rope of the invention comprises a 12- strand twisted rope. The invention also comprises a mooring rope composed of 3, 4, 6+1, 8 or 12 twisted mooring ropes, wherein the composition of these mooring ropes is in accordance with any of the embodiments described above.
The mooring rope of the invention can be used for various maritime applications, but also for any application outside this field. In particular, the mooring rope of the invention can be used for mooring ships.
The invention also comprises the production process for manufacturing the mooring ropes of the invention, wherein a production process known in the area of mooring ropes is used.
Description of the figures
Fig. 1A: An external view and cross-section of a mooring rope of the invention in a 3- strand embodiment.
Fig. IB: An external view and cross-section of a mooring rope of the invention in a 6+1 -strand embodiment. Fig. 1C: An external view of a mooring rope of the invention in an 8-strand embodiment.
Fig. ID: An external view and cross-section of a mooring rope of the invention in a 12- strand embodiment.
Fig. 2: An 8-strand mooring rope, wherein each strand has a core of polypropylene rope yam, eight polypropylene rope yarns twisted around said core, and 14 further HMPE rope yams also twisted around said core.
Fig. 3: A 12-strand mooring rope, wherein each strand has a core of polypropylene rope yam, four polypropylene rope yarns and four HMPE rope yams symmetrically twisted around said core, and 14 further HMPE rope yams also twisted around said core.
Fig. 4: A 6+1-strand mooring rope, wherein each strand has a core of polypropylene rope yarn, four polypropylene rope yarns and four HMPE rope yarns symmetrically twisted around said core, 14 further HMPE rope yams also twisted around said core, and a layer of HMPE rope yams also twisted around said core.
Fig. 5: A 4-strand mooring rope, wherein each strand has a core of polypropylene rope yams, eight polypropylene rope yarns twisted around said core, 14 further HMPE rope yams also twisted around said core, and a layer of HMPE rope yams also twisted around said core.
Fig. 6: A 12-strand mooring rope, wherein each strand has a core of polypropylene rope yams, two layers of polypropylene rope yarns twisted around said core, and two layers of HMPE rope yarns also twisted around said core.

Claims

1. Mooring rope comprising a plurality of strands of synthetic materials, wherein the rope yarns of the strands are twisted around a core comprising polypropylene rope yarn and wherein the rope yarn of the core has lower tensile strength and higher elongation at break compared to the rope yarn of the strands.
2. Mooring rope according to claim 1 , wherein the rope yarns of the strands comprise HMPE, aramids, para-aramids, LCP or ceramic fibres.
3. Mooring rope according to any of the preceding claims, wherein the core is enclosed by one or a plurality or layers comprising any more or less symmetrical combination of rope yarn comprising polypropylene and a rope yarn comprising one of the following synthetic materials: HMPE, aramids, para-aramids, LCP or ceramic fibres.
4. Mooring rope according to claim 3, wherein the layer or layers comprising a combination of rope yarns are also enclosed by one or a plurality of layers of rope yarns consisting entirely of HMPE, aramids, para-aramids, LCP or ceramic fibres.
5. Mooring rope composed of 3, 4, 6+1, 8 or 12 strands of synthetic materials, wherein each of the strands has the characteristic of any of the preceding claims.
6. Mooring rope according to claim 3, wherein the layer or layers comprising a combination of rope yarn consist entirely of polypropylene.
7. Mooring rope according to claim 4, wherein the layer or layers of rope yarn enclosing the layer or layers comprises/comprise a combination of rope yarns consist(s) entirely of HMPE.
8. Use of a mooring rope according to any of claims 1 through 8 for the mooring of ships. Production process for the manufacture of a mooring rope comprising a plurality of strands of synthetic materials, wherein the strands are twisted as specified in one of claims 1 through 8.
PCT/EP2016/055025 2015-03-10 2016-03-09 Multiple synthetic material mooring rope and production process Ceased WO2016142425A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2015/100 2015-03-10
BE2015/0100A BE1022578B1 (en) 2015-03-10 2015-03-10 MULTI-PLASTICS MULTI-ROPE AND PRODUCTION PROCESS

Publications (1)

Publication Number Publication Date
WO2016142425A1 true WO2016142425A1 (en) 2016-09-15

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PCT/EP2016/055025 Ceased WO2016142425A1 (en) 2015-03-10 2016-03-09 Multiple synthetic material mooring rope and production process

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WO (1) WO2016142425A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107815904A (en) * 2017-12-01 2018-03-20 桐乡市易知简能信息技术有限公司 A kind of preparation method of the rope of asymmetric instruction pulling force
CN107956176A (en) * 2017-12-01 2018-04-24 桐乡市易知简能信息技术有限公司 A kind of preparation method of the rope of asymmetric display pulling force
WO2018138298A1 (en) * 2017-01-26 2018-08-02 Lankhorst Euronete Portugal, S.A. Sinkable ropes and nets
CN111483556A (en) * 2020-04-22 2020-08-04 鲁普耐特集团有限公司 A hybrid mooring beacon system and a method for making a synthetic mooring rope

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB825627A (en) * 1955-02-02 1959-12-16 Hoechst Ag Improvements in or relating to the manufacture of ropes
US3383849A (en) * 1966-08-10 1968-05-21 Stirling James Rope strand or yarn and method of making same to reduce its whip-back characteristic at rupture
DE7438919U (en) * 1974-11-22 1975-08-21 Felten & Guilleaume Carlswerk Ag Plastic crane rope
US4022010A (en) * 1974-11-22 1977-05-10 Felten & Guilleaume Carlswerk Ag High-strength rope
US4534262A (en) * 1983-04-01 1985-08-13 The United States Of America As Represented By The Secretary Of The Navy Safety mooring line
WO1992022701A1 (en) * 1991-06-11 1992-12-23 Dsm N.V. Roping
US5852926A (en) * 1997-08-25 1998-12-29 Wellington Leisure Products, Inc. Balanced strand cordage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB825627A (en) * 1955-02-02 1959-12-16 Hoechst Ag Improvements in or relating to the manufacture of ropes
US3383849A (en) * 1966-08-10 1968-05-21 Stirling James Rope strand or yarn and method of making same to reduce its whip-back characteristic at rupture
DE7438919U (en) * 1974-11-22 1975-08-21 Felten & Guilleaume Carlswerk Ag Plastic crane rope
US4022010A (en) * 1974-11-22 1977-05-10 Felten & Guilleaume Carlswerk Ag High-strength rope
US4534262A (en) * 1983-04-01 1985-08-13 The United States Of America As Represented By The Secretary Of The Navy Safety mooring line
WO1992022701A1 (en) * 1991-06-11 1992-12-23 Dsm N.V. Roping
US5852926A (en) * 1997-08-25 1998-12-29 Wellington Leisure Products, Inc. Balanced strand cordage

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018138298A1 (en) * 2017-01-26 2018-08-02 Lankhorst Euronete Portugal, S.A. Sinkable ropes and nets
GB2590105A (en) * 2017-01-26 2021-06-23 Lankhorst Euronete Portugal S A Sinkable ropes and nets
GB2590105B (en) * 2017-01-26 2022-02-16 Lankhorst Euronete Portugal S A Sinkable ropes and nets
CN107815904A (en) * 2017-12-01 2018-03-20 桐乡市易知简能信息技术有限公司 A kind of preparation method of the rope of asymmetric instruction pulling force
CN107956176A (en) * 2017-12-01 2018-04-24 桐乡市易知简能信息技术有限公司 A kind of preparation method of the rope of asymmetric display pulling force
CN107815904B (en) * 2017-12-01 2019-10-01 桐乡市易知简能信息技术有限公司 A kind of preparation method of the rope of asymmetric instruction pulling force
CN107956176B (en) * 2017-12-01 2019-10-01 桐乡市易知简能信息技术有限公司 A kind of preparation method of the rope of asymmetric display pulling force
CN111483556A (en) * 2020-04-22 2020-08-04 鲁普耐特集团有限公司 A hybrid mooring beacon system and a method for making a synthetic mooring rope

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