EP2903812A1 - Tuyau renforcé par un fil hybride résistant à l'abrasion, et procédé de fabrication de ce tuyau - Google Patents
Tuyau renforcé par un fil hybride résistant à l'abrasion, et procédé de fabrication de ce tuyauInfo
- Publication number
- EP2903812A1 EP2903812A1 EP12815781.5A EP12815781A EP2903812A1 EP 2903812 A1 EP2903812 A1 EP 2903812A1 EP 12815781 A EP12815781 A EP 12815781A EP 2903812 A1 EP2903812 A1 EP 2903812A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tubular article
- polymeric tubular
- wrap
- core
- previous
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000005299 abrasion Methods 0.000 title description 12
- 238000000034 method Methods 0.000 title description 8
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- 230000002787 reinforcement Effects 0.000 claims description 20
- 229920003235 aromatic polyamide Polymers 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 13
- 229920000728 polyester Polymers 0.000 claims description 12
- 239000004760 aramid Substances 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 239000000806 elastomer Substances 0.000 claims description 6
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 5
- 229920002530 polyetherether ketone Polymers 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 229920001470 polyketone Polymers 0.000 claims description 4
- 239000004953 Aliphatic polyamide Substances 0.000 claims description 3
- 229920000433 Lyocell Polymers 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 3
- 229920000297 Rayon Polymers 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 229920003231 aliphatic polyamide Polymers 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 3
- 239000002964 rayon Substances 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 229920002457 flexible plastic Polymers 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 239000000088 plastic resin Substances 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims 2
- 239000002654 heat shrinkable material Substances 0.000 claims 1
- 229920001169 thermoplastic Polymers 0.000 claims 1
- 239000004416 thermosoftening plastic Substances 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 10
- 229920000271 Kevlar® Polymers 0.000 description 7
- 239000004744 fabric Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- -1 PBO Polymers 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 239000004753 textile Substances 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 4
- 238000009940 knitting Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000001747 exhibiting effect Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 238000009954 braiding Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 238000007655 standard test method Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004709 Chlorinated polyethylene Substances 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 229920000784 Nomex Polymers 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229920001494 Technora Polymers 0.000 description 1
- 229920000561 Twaron Polymers 0.000 description 1
- 229920000508 Vectran Polymers 0.000 description 1
- 239000004979 Vectran Substances 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 239000007798 antifreeze agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 229920005557 bromobutyl Polymers 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229920005556 chlorobutyl Polymers 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 229920006229 ethylene acrylic elastomer Polymers 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229920002681 hypalon Polymers 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000004763 nomex Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920002755 poly(epichlorohydrin) Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002577 polybenzoxazole Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 239000005076 polymer ester Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 239000004950 technora Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/36—Cored or coated yarns or threads
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
- D02G3/447—Yarns or threads for specific use in general industrial applications, e.g. as filters or reinforcement
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
- D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/22—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration
- D04B1/225—Elongated tubular articles of small diameter, e.g. coverings or reinforcements for cables or hoses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
- F16L11/085—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more braided layers
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/02—Reinforcing materials; Prepregs
Definitions
- the present invention relates to a polymeric tubular article comprising a hybrid reinforcing yarn, wherein the reinforcing yarn comprises a high strength core and at least one wrap of a sheath yarn wound about the core for better fatigue resistance at high temperature.
- Low-pressure hoses are generally reinforced with textile yarns to withstand required internal pressures without compromising flexibility.
- Braid, spiral, wrap, and knit reinforcements are well known types of textile yarn reinforcements. But for hoses with complicated shapes, knit reinforcement is often preferred due to its flexibility. Knit reinforcement is accomplished by applying reinforcing yarns over the tube to form loops interlocking with each other. This chain-like structure results in yarns passing over other yarns. However, continuous radial expansion and contraction of the hose because of internal pressure changes cause these yarns to move back and forth and cut each other at knot points. Once a yarn is broken, the knit reinforcement starts to unravel at that point resulting in a local hole in the fabric. As a result, hose may excessively expand in that region and rupture. Thus, abrasion resistance of a reinforcing yarn determines its long-term dynamic fatigue performance, which in turn determines the operating life of the knitted hose.
- l Yarns such as PEN, PBO, para-aramid, para-aramid copolymer, carbon and liquid crystal polyester are known to exhibit high tensile strength.
- long-term dynamic fatigue performance of these yarns at high temperatures is not satisfactory because of yarn on yarn abrasion.
- composite cords composed of two or more yarns.
- a composite or hybrid cord refers to a single yarn comprising strands of two or more kinds with different properties, wherein individual strands are core spun, twisted, commingled, air covered, wrapped etc. to obtain the final cord. The proportion and the orientation of each kind are adjusted according the desired properties of the final cord.
- US Patent Application 20080202618 describes a hose reinforced with a hybrid cord comprising multiple monofilaments and short fibers entangled between them to increase adhesion of the cord to the rubber layers.
- US Patent Application 20100224298 discloses a tire reinforced with a hybrid cord produced by commingling process, which includes two different multifilament yarns having different initial tangent moduli.
- EP2066947 relates to a flexible hose reinforced with a hybrid cord wherein two yarns having different fatigue properties are twisted together in order to increase the fatigue performance.
- the disclosed hybrid yarn comprises a first yarn of co-para-aramid fibers and a second yarn of meta-aramid fibers which are twisted, plied, folded, or commingled together to form a single hybrid reinforcing yarn for the hose.
- the hybrid yarn may have a surface comprising both co-para-aramid fibers and meta-aramid fibers so that the pressure-carrying yarn is not fully isolated and it is still open to yarn-on-yarn abrasion and self-cutting at contact points.
- twisted co-para-aramid and meta-aramid yarns are expensive especially for coolant hoses.
- the object of the invention is to provide an inexpensive polymeric tubular article exhibiting improved fatigue resistance at high temperatures.
- a tubular product which comprises an inner tube, a reinforcement, and an outer tube; wherein said reinforcement comprises a hybrid cord comprising a pressure carrying high strength core and at least one, preferably two wraps wound around the core in opposite directions.
- the term "yarn" within the context of the present invention is to be interpreted broadly to include a continuous strand of textile fibers, filaments or material in a form suitable for knitting, weaving or otherwise intertwining to form a textile fabric.
- “Fiber” refers to an elongate, individual, monolithic unit of matter that forms the basic element of a fabric and the "filament” refers to a continuous fiber of extremely long length.
- the term “strand” refers to an ordered assemblage of textile fibers having a high ratio of length to diameter. For the purpose of this application, it shall be understood to mean a single fiber, filament, monofilament or yarn.
- cord refers to a twisted or formed structure composed of one or more single or plied filaments, strands, or yarns of organic polymer or inorganic materials and "greige” is a descriptive term for yarns that have not received any bleaching, dyeing or finishing treatment after being produced.
- the entire tensional load is carried by the longitudinally extending core.
- Wraps only function to protect and therefore increase the yarn-on-yarn abrasion resistance of the core to improve long term fatigue performance.
- the core is completely covered with the wrappings in such a way that the surface of the hybrid cord comprises only the wrapped sheath yarns. In this way, load carrying core yarns are isolated from each other so that possibility of self-cutting is eliminated.
- This structure also protects the core against yarn to metal abrasion which occurs during knitting, braiding and spiraling operation.
- the inventive tubular article can be used as a fluid transfer hose as well as a bellow, expansion joint or the like. Of particular importance is low-pressure fluid transfer hoses used in automotive applications like turbocharger, radiator, heater or fuel hoses.
- FIG. l is a perspective view of the polymeric tubular article in accordance with the invention.
- FIG. 2 shows a typical knit fabric.
- FIG. 3 is a diagrammatic drawing of a composite cord constructed in accordance with the invention.
- FIG. 4 is a graph showing the burst pressure values of samples before and after the fatigue life test.
- FIG. 5 is a graph showing a single pressure cycle of hose fatigue life test.
- Figure l shows an arrangement of the inventive tubular article (l).
- Article comprises an inner tube (io) onto which a reinforcement (n) is knitted and an outer tube (12) covering the knitting.
- Figure 2 illustrates the details of a typical knit fabric.
- There are different types of knit fabrics called plain stitch, lock stitch etc, but in common, they all have the cord (111) forming loops (110) interlocking with each other and creating contact points (110').
- Figure 3 illustrates a preferred embodiment of a hybrid cord (111) used in the reinforcement (11) of the tubular article (1) in accordance with the invention.
- the hybrid cord (111) comprises an elongated core (115) with at least one strand of a high strength yarn, a first wrap (116) of a sheath yarn wound around the core in one direction, and a second wrap (118) of a sheath yarn wound in opposite direction to the first wrap.
- the load carrying core (115) comprises at least one strand of a high tensile strength material selected from the group consisting of polyester, liquid crystal polyester, polyamide, para-aramid, para-aramid copolymer, polyimide, polyphenylene-2,6-benzobisoxazole (PBO), polyketone (PK), polyetheretherketone (PEEK), glass, carbon, basalt, steel and blends thereof.
- a high tensile strength material selected from the group consisting of polyester, liquid crystal polyester, polyamide, para-aramid, para-aramid copolymer, polyimide, polyphenylene-2,6-benzobisoxazole (PBO), polyketone (PK), polyetheretherketone (PEEK), glass, carbon, basalt, steel and blends thereof.
- Various forms of such para- aramid fibers are available from E.I. duPont de Nemours and Company under trademark Kevlar®, from Teijin Ltd. under trademark Twaron®, from Kolon Industries
- Para-aramid copolymer fibers known under trademark Technora® are available from Teijin Ltd., and liquid crystal polyester, also known as aromatic polyester are sold by Kuraray Co. Ltd. under trademark Vectran®.
- Poly(p- phenylene-2,6-benzobisoxazole) (PBO) known as liquid crystalline polyoxazole fibers are commercially available from Toyobo Co Ltd under trademark Zylon®, and polyetheretherketone fibers made of polyether are sold by Zyex Ltd. under trademark Zyex®.
- Wraps (116, 118) of sheath yarns protect the core (115) to improve its yarn-on-yarn and yarn-to-metal abrasion resistance.
- the core (115) has a total linear density in the range of about 400 to 4000 dtex and sheath yarns of each wrap (116, 118) has about 40 to 400 dtex.
- Preferably linear density of the yarn of the second wrap (118) is equal to the first wrap (116).
- the core (115) is completely covered with the wraps (116, 118) in such a way that the surface of the hybrid cord (111) comprises only the yarns of wrappings.
- the first and second wraps (116,118) are wound at the rate of 200 - 4000 turns per meter depending on the linear density and twist level of the core (115) and wrap (116,118) yarns.
- first wrap (116) is wound in one direction about the core (115) and a second wrap (118) is wound in an opposite direction to the first wrap.
- first wrap (116) is wound in one direction about the core (115)
- second wrap (118) is wound in an opposite direction to the first wrap.
- first wrap (116) is wound in one direction about the core (115)
- second wrap (118) is wound in an opposite direction to the first wrap.
- the possibility of unraveling of the wrappings at high stress contact points is eliminated.
- a single wrap (116) wound in either S or Z direction it is also possible to use a single wrap (116) wound in either S or Z direction.
- more than two wraps can also be employed. In the latter case, each subsequent wrap is wound in a direction opposite to the previous wrap.
- the core (115) comprises a single strand, either composed of a single filament or filaments plied, textured, commingled, twisted or air covered together.
- the wraps (116, 118) may be wound around this bundle.
- greige yarn is used in the core (115) and the wraps (116, 118).
- the core or sheath yarns or the final hybrid cord can be treated with adhesives or bonding elastomers or may comprise plastic resin layers.
- wet lubricants such as synthetic oil or grease, glycerol, polybutane, polymer ester, polyolefines, polyglycols, silicon, soap, natural or synthetic waxes, resins and tars with additives of organic and/or inorganic thickeners, such as, for example, organic polymers, polycarbamide, metal soap, silicates, metal oxides, silicic acid, organophilic betonite or dry lubricant such as Talcum, graphite powder, molybdenum disulfide, polytetrafluorethylene (PTFE), lead (Pb), gold (Au), silver (Ag), boron trioxide (BO3), lead oxide (PbO), zinc oxide (ZnO), copper oxide (Q12O), molybdenum trioxide (M0O3) and titanium dioxide (T1O2) can be applied to the core or sheath yarns prior to wrapping process.
- organic and/or inorganic thickeners such as, for example, organic polymers, poly
- the final hybrid cord (111) can be dipped in lubricants stated above.
- 1-10 cN/tex pre tension is applied to the core (115) before the wraps (116,118) are wound.
- the first wrap (116) is wound around the core (115) with closed coiling
- the second wrap (118) is wound around the first one again with closed coiling.
- Both the first and second wraps must be coiled in precision without any gap to cover the core (115) completely.
- the inventive tubular article (1) can be used as a fluid transfer hose, bellow, expansion joint or the like. Of particular importance is low-pressure fluid transfer hoses used in automotive applications like turbocharger, radiator, heater or fuel hoses.
- the polymeric material used in inner (10) and/or outer tube (12) of the tubular article (1) can be selected among elastomers, termoplastic elastomers or flexible plastics.
- vulcanized rubber compositions comprising any one of ethylene acrylic elastomer, ethylene propylene diene copolymer, ethylene propylene copolymer, chloroprene rubber, chlorinated polyethylene, chlorosulfonated polyethylene, polyepichlorohydrin, nitrile rubber, hydrogenated nitrile rubber, fluoro rubber, natural rubber, styrene-butadiene rubber, isoprene rubber, butyl rubber, bromobutyl rubber, chlorobutyl rubber, butadiene rubber, silicone rubber, acrylate rubber, ethylene-vinyl acetate rubber, and blends thereof.
- the hybrid cord reinforcement (11) may reside between the inner and the outer tube (10, 12) and/or may be embedded in a layer (10, 12) of the product. Also, it should be noted that the invention is not limited to the knit reinforcement. As one skilled in the art will appreciate, disclosed hybrid cord reinforcement (11) may also be provided in the form of braid, spiral, wound or any other type of known textile yarn reinforcements.
- a further object of the invention is to provide a method for producing a polymeric tubular article (1) exhibiting improved fatigue resistance at high temperatures.
- This object is achieved by a method comprising the steps of - forming a hybrid cord (111) by winding a first wrap (116) of a sheath yarn around a core (115) in a first direction, then winding a second wrap (118) around the first wrap in an opposite direction;
- the reinforcement (11) is preferably formed by knitting with plain stitch, lock stitch or any other stitch pattern. However it may also be formed by braiding or spiral winding or wrapping the hybrid cord over the inner tube.
- the method may also include a final step of curing the polymeric tubular article (1) on a linear or curved mandrel. Curing may be accomplished by steam or air vulcanization.
- each yarn construction is also individually tested to measure tensile strength and yarn-on-yarn abrasion resistance.
- Each of the six sample hoses has a 16 mm inner diameter and 3,5 mm wall thickness.
- EPDM composition is used for both inner and outer layers and the reinforcements are knit with a plain stitch on a 1 3/16" knitter head with 8 needles, 4 bobbins, at 3 mm per stitch for all samples.
- Each sample is vulcanized on a L-shaped curved metal mandrel in steam autoclave.
- Sample hose 1 utilizes an example embodiment of the inventive hybrid cord where a 1100 dtex Kevlar continuous filament core yarn having a twist level of 90 tpm is first wrapped by a 167 dtex PES yarn with a twist level of 30 tpm at a rate of 1200 turns per meter. Then a second wrap of PES yarn having same linear density and twist level as the first wrap is wound around the first one again at a rate of 1200 turns per meter.
- Example 2
- Example 2 has the same construction as that of the first embodiment of the reinforced hose except that the wrapping yarns on the Kevlar® 1100 core yarn are 220 dtex PES. This polyester yarn has higher linear density than the first embodiment.
- Example 3
- Example 3 has the same construction as that of the second embodiment of the reinforced hose except that the wrapping yarns on the core Kevlar® 1100 yarn are 220 dtex PPS .
- Example 4 has the same construction as that of the second embodiment of the reinforced hose except that the wrapping yarns on the Kevlar® 1100 core yarn are 220 dtex Nomex® .
- Example 5 has the same construction as that of the first embodiment of the reinforced hose except that reinforcing material is Kevlar® 1100 greige yarn.
- Example 6 has same construction as that of the first embodiment of the reinforced hose except that the reinforcing material is Kevlar® 1100 /PET 1100 twisted hybrid yarn.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
La présente invention concerne un article tubulaire polymère qui comprend un fil de renfort hybride, ledit fil de renfort comprenant une âme à haute résistance et au moins un guipage, fait d'un fil de gaine enroulé autour de l'âme pour conférer une meilleure résistance à la fatigue à haute température.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2012/055365 WO2014053884A1 (fr) | 2012-10-05 | 2012-10-05 | Tuyau renforcé par un fil hybride résistant à l'abrasion, et procédé de fabrication de ce tuyau |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2903812A1 true EP2903812A1 (fr) | 2015-08-12 |
Family
ID=47559580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12815781.5A Withdrawn EP2903812A1 (fr) | 2012-10-05 | 2012-10-05 | Tuyau renforcé par un fil hybride résistant à l'abrasion, et procédé de fabrication de ce tuyau |
Country Status (2)
Country | Link |
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EP (1) | EP2903812A1 (fr) |
WO (1) | WO2014053884A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3106296B1 (fr) * | 2015-06-16 | 2020-01-01 | Ramspott GmbH & Co. KG | Tuyau avec une couche de textile |
US20170175301A1 (en) * | 2015-12-17 | 2017-06-22 | E I Du Pont De Nemours And Company | Hybrid Cord and Use Thereof |
DE102017214082A1 (de) * | 2017-08-11 | 2019-02-14 | Continental Reifen Deutschland Gmbh | Hybridkord zur Verwendung als Festigkeitsträger in einer Gürtelbandage eines Fahrzeugluftreifens |
CN116084068A (zh) * | 2023-01-19 | 2023-05-09 | 福建新华源纺织集团有限公司 | 一种包芯包缠纱线及其制备方法和应用 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9309951D0 (en) * | 1993-05-14 | 1993-06-30 | Milliken Europ Nv | Stabilised fabrics and reinforced products containing them |
US6627281B2 (en) * | 2001-01-26 | 2003-09-30 | Milliken & Company | Textile reinforced thin-walled thermoplastic or thermoset medium pressure pipes |
US6305423B1 (en) * | 2000-06-05 | 2001-10-23 | Milliken & Company | Thermoplastic or thermoset pipes including conductive textile reinforcements for heating and leak detection purposes |
US7572745B2 (en) | 2006-09-26 | 2009-08-11 | The Gates Corporation | Fluid transfer hose reinforced with hybrid yarn |
JP4842173B2 (ja) | 2007-02-28 | 2011-12-21 | 東海ゴム工業株式会社 | 繊維補強ホース |
EP2222480B1 (fr) | 2007-10-24 | 2011-07-27 | Pirelli Tyre S.P.A. | Pneu ayant un élément structurel renforcé par un fil hybride |
DE102010000061A1 (de) * | 2010-01-13 | 2011-07-14 | ContiTech Schlauch GmbH, 30165 | Schlauchförmiger Artikel, insbesondere Förderschlauch, mit progressiver Volumenzunahme und Verfahren zu dessen Herstellung |
CN102561076B (zh) * | 2010-12-16 | 2015-02-25 | 杜邦公司 | 具有高断裂强力和高断裂伸长率的复合绳及相关增强制品和用途 |
DE202011005577U1 (de) * | 2011-04-21 | 2012-07-24 | Rehau Ag + Co | Schlauch zur Führung von Fluiden |
-
2012
- 2012-10-05 EP EP12815781.5A patent/EP2903812A1/fr not_active Withdrawn
- 2012-10-05 WO PCT/IB2012/055365 patent/WO2014053884A1/fr active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2014053884A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2014053884A1 (fr) | 2014-04-10 |
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