Classifications

• • 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
  • 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
  • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
  • D02G3/38—Threads in which fibres, filaments, or yarns are wound with other yarns or filaments, e.g. wrap yarns, i.e. strands of filaments or staple fibres are wrapped by a helically wound binder yarn
• • 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
  • D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
  • D02G3/404—Yarns or threads coated with polymeric solutions
• • 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
  • D02G3/48—Tyre cords
• • 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

Definitions

• the invention relates to a cord consisting of a core and a sheath.
• Such a cord is for example in EP 1 411 159 described in which the core is made of glass fibers and the sheath of aramid yarns. This cord serves to reinforce elastomeric materials such as tires or belts.
• cords which are at least comparable or better in their properties with the known cords.
• such cords should ensure the longest possible service life of composite materials reinforced with such cords.
• the cords are resistant to oil and / or hydrolysis resistant.
• the object of the present invention is to provide further cords which are suitable for reinforcing elastomeric materials.
• the cords should ensure a long service life of the elastomeric material reinforced with such cords.
• cords are to be provided with a good resistance to hydrolysis.
• a cord is to be provided, which is inexpensive to produce.
• the object of the invention is achieved by a cord comprising a core and a sheath, wherein the core contains high modulus fibers embedded in a matrix which is at least predominantly sheathed with the sheath-forming fibers and wherein the matrix of the core is a thermoplastic.
• the core serves as a strength carrier, which is characterized in particular by high dimensional stability.
• Such a cord can be produced for example in such a way that the high modulus fibers are impregnated with the matrix material. Thereafter, the core is wrapped, for example, with staple fibers, after which then the staple fibers form the sheath.
• At least one multifilament yarn is preferred as the fibers forming the sheath, which is wound around the core.
• the wrapping is preferably carried out such that after wrapping the core covered as well as possible, that is as possible no longer visible. If several multifilament yarns are used to produce the jacket, they can be wound in the same direction and / or in opposite directions around the core. Also, multiple multifilament yarns may be braided into a sheath.
• thermoplastic fibers can be mixed with the high-modulus fibers, wherein this mixture is heated in a later step so that the thermoplastic fibers melt and become the matrix in which the high-modulus fibers are embedded.
• the high modulus fibers can be present as continuous fibers, for example as multifilament yarn, and the thermoplastic fibers are well mixed with the high modulus fibers, for example by means of known per se swirling by means of air.
• finite fibers for example staple fibers or fibers which have been produced by stretch breaking, can also be used for the high-modulus fibers.
• thermoplastic fibers which are also staple fibers or stretch-broken fibers.
• the broken fibers have different lengths, and the average length and length distribution of the fibers can be influenced to some extent.
• an average length of 70 to 170 mm preferably from 110 to 130 mm and in particular about 120 mm and a length distribution of 40 to 230 cm has been well proven.
• Such fibers can then be mixed in a manner known per se and used without twisting or in the form of a yarn as a core around which the mutifilament yarn forming the sheath is wound.
• the mixed, consisting of high-modulus fibers and thermoplastic fibers yarn can be heated either before the sheath with the multifilament yarn so that melt the thermoplastic fibers and embedding the Hochmodulmaschinen as a matrix.
• thermoplastic fibers It is particularly favorable first to wrap the mixture of high-modulus fibers and thermoplastic fibers with at least one multifilament yarn.
• an adhesion promoter preferably an RFL (resorcinol-formaldehyde-latex) adhesion promoter, which is crosslinked under the action of temperature, is usually applied to the cords before embedding in the elastomeric material
• the temperature treatment required for crosslinking the adhesion promoter can also be used can be used to melt the thermoplastic fibers and convert them into matrix material.
• the matrix of the core of the cord according to the invention is a thermoplastic which has a melting point or melting point range between 150 and 420 ° C., preferably between 180 and 260 ° C.
• a melting point or melting range for the thermoplastic between 200 and 230 ° C has proven to be particularly useful here.
• thermoplastic material for the matrix of the core virtually all materials which can be spinned into fibers by melt spinning are suitable, in particular thermoplastic polyurethanes (TPU), polyesters (PET), polyphenylene sulfides (PPS), polyethylenes (PE) or polyamides (PA).
• TPU thermoplastic polyurethanes
• PET polyesters
• PPS polyphenylene sulfides
• PE polyethylenes
• PA polyamides
• PA polyamides
• the cord according to the invention is characterized in particular by the fact that the core contains 15 to 50% by volume, preferably 25 to 40% by volume, based on the core without sheath, of matrix. It has been found that it is not absolutely necessary on the one hand that the high modulus fibers are completely embedded in matrix material, but on the other hand it is advantageous if the core has as little excess matrix material as possible when embedding the cord in the elastomeric material Material applied heat would embed a considerable proportion of filaments of the sheath-forming multifilament yarn. In the same way, it has turned out to be an advantage if the matrix material is distributed as evenly as possible in the core.
• the cord according to the invention is characterized in that the high modulus fibers in the core have a modulus of 200 to 550 GPa, preferably 200 to 350 GPa, more preferably 200 to 250 GPa. Carbon fibers are best suited for this purpose.
• the multifilament yarn or the multifilament yarns have a lower modulus than the modulus of the high modulus fibers of the core.
• multifilament yarns with a modulus of from 70 to 150 GPa, in particular from 70 to 120 GPA have proven to be very useful.
• a multifilament yarn of aramid has proven itself.
• the cord according to the invention is ideally suited for the production of fiber-reinforced elastomeric materials.
• the subject of vorfiegenden invention is a V-belt as well as a toothed belt, which contains a cord according to the invention.
• This core component was wound with 2 yarns 3 in opposite directions, each with 250 turns per meter (1 yarn with 250 turns per meter in the Z direction and a yarn with 250 turns per meter in the S direction), resulting in an untreated cord, which in the core component contained the filaments of yarns 1 and 2.
• This cord was provided with an RFL dip in two stages in the following manner. In the first step, the cord surface (essentially the filaments of the yarn 3) was epoxidized in a surface treatment. In the second step, the cord was dipped in aqueous RFL and cured at 235 ° C with the filaments of yarn 2 melting and becoming the matrix for the filaments of yarn 1.
• the obtained dipped cord was embedded in hydrogenated nitrile rubber. Furthermore, two commercially available cords Glass A and Glass B, which contained glass filaments in the core, were dipped in the same manner and embedded in hydrogenated nitrile rubber.
• Cord A is made by NGF Europe Ltd. under the designation "Type EC9, 34, 3/11 80S, black dipped", while Cord B is sold and sold by Sovoutri as a reinforcing cord.
• SPAF trap peel adhesion force
• the cord according to the invention has significantly higher values with regard to the breaking strength and the force at the measured strains than conventional cords which have glass fibers in their core. Also, the cord according to the invention is characterized by lower elongation at break. With regard to the adhesion in rubber, the cord according to the invention has comparable properties to those of today's cords. In this respect, the cord according to the invention can be regarded as a significant improvement.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Crystallography & Structural Chemistry (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Materials For Medical Uses (AREA)
• Ropes Or Cables (AREA)
• Reinforced Plastic Materials (AREA)

Priority Applications (8)

Applications Claiming Priority (1)

Publications (2)

Family

ID=35285566

Family Applications (1)

Country Status (8)

Families Citing this family (10)

Family Cites Families (29)

• 2005
  • 2005-07-15 AT AT05015392T patent/ATE414807T1/de not_active IP Right Cessation
  • 2005-07-15 PL PL05015392T patent/PL1743964T3/pl unknown
  • 2005-07-15 EP EP05015392A patent/EP1743964B1/de not_active Not-in-force
  • 2005-07-15 DE DE502005006007T patent/DE502005006007D1/de active Active
• 2006
  • 2006-07-13 KR KR1020060065859A patent/KR20070009443A/ko not_active Application Discontinuation
  • 2006-07-13 JP JP2006192632A patent/JP2007023473A/ja not_active Ceased
  • 2006-07-17 CN CN2006101062693A patent/CN1896352B/zh not_active Expired - Fee Related
  • 2006-07-17 US US11/487,426 patent/US20070169458A1/en not_active Abandoned

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