WO2015108312A1 - 치수안정성이 우수한 폴리에스테르 타이어 코드 및 이의 제조방법 - Google Patents
치수안정성이 우수한 폴리에스테르 타이어 코드 및 이의 제조방법 Download PDFInfo
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- WO2015108312A1 WO2015108312A1 PCT/KR2015/000314 KR2015000314W WO2015108312A1 WO 2015108312 A1 WO2015108312 A1 WO 2015108312A1 KR 2015000314 W KR2015000314 W KR 2015000314W WO 2015108312 A1 WO2015108312 A1 WO 2015108312A1
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- WIPO (PCT)
- Prior art keywords
- yarn
- polyester
- tire cord
- less
- elongation
- Prior art date
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- 229920000728 polyester Polymers 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000009987 spinning Methods 0.000 claims abstract description 12
- 238000007598 dipping method Methods 0.000 claims description 10
- 238000004073 vulcanization Methods 0.000 claims description 7
- 238000009941 weaving Methods 0.000 claims description 7
- 239000004816 latex Substances 0.000 claims description 6
- 229920000126 latex Polymers 0.000 claims description 6
- MMINFSMURORWKH-UHFFFAOYSA-N 3,6-dioxabicyclo[6.2.2]dodeca-1(10),8,11-triene-2,7-dione Chemical group O=C1OCCOC(=O)C2=CC=C1C=C2 MMINFSMURORWKH-UHFFFAOYSA-N 0.000 claims description 5
- KVBYPTUGEKVEIJ-UHFFFAOYSA-N benzene-1,3-diol;formaldehyde Chemical compound O=C.OC1=CC=CC(O)=C1 KVBYPTUGEKVEIJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 4
- 230000000052 comparative effect Effects 0.000 description 26
- 238000001816 cooling Methods 0.000 description 15
- 238000001035 drying Methods 0.000 description 10
- 238000009998 heat setting Methods 0.000 description 7
- 238000004804 winding Methods 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- 238000010791 quenching Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 1
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 1
- PXGZQGDTEZPERC-UHFFFAOYSA-N 1,4-cyclohexanedicarboxylic acid Chemical compound OC(=O)C1CCC(C(O)=O)CC1 PXGZQGDTEZPERC-UHFFFAOYSA-N 0.000 description 1
- OONPLQJHBJXVBP-UHFFFAOYSA-N 3-(2-phenylethenyl)phthalic acid Chemical class OC(=O)C1=CC=CC(C=CC=2C=CC=CC=2)=C1C(O)=O OONPLQJHBJXVBP-UHFFFAOYSA-N 0.000 description 1
- 235000003403 Limnocharis flava Nutrition 0.000 description 1
- 244000278243 Limnocharis flava Species 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- -1 dicarboxylic acid Chemical compound 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
Images
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
- D02G3/48—Tyre cords
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/28—Heating or cooling arrangements for yarns
-
- 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
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
-
- 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
- D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
- D02G3/404—Yarns or threads coated with polymeric solutions
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
-
- 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
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/06—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyethers
Definitions
- the present invention relates to a polyester tire cord having excellent dimensional stability using a yarn manufactured by adjusting spinning and drawing conditions and a method of manufacturing the same.
- High strength polyester fiber is widely used in industrial applications including rubber reinforcement tire cords, seat belts, conveyor belts, V-belts and hoses. When applied to a tire cord by latex treatment and heat treatment, better dimensional stability and strength are required.
- the above method has difficulty in producing yarns due to poor degradability such as deterioration of ductility and filament fusion due to an increase in crystallinity.
- An object of the present invention is to provide a polyester tire cord having excellent dimensional stability and a method of manufacturing the same.
- the present invention relates to a tire cord twisted and dipped with polyester yarn, wherein the tire cord after vulcanization at 170 ° C. for 20 minutes (@ 2.25 g / d) is E 2 , and the tire cord before vulcanization is Polyester tire cord with excellent dimensional stability when the middle elongation (@ 2.25g / d) is E 1 and the difference between E 2 and E 1 is ⁇ E, the value of ⁇ E divided by E 1 is 0.5 or less To provide.
- the intermediate elongation is a value measured at 25 ° C, 60 ° C, 90 ° C and 120 ° C, respectively.
- polyester yarn before the yarn is characterized in that the intrinsic viscosity of 0.90 to 1.00, the median elongation (@ 4.5g / d) value of 6.5% or less, shrinkage of 2.0% or less, E-S of 8.0% or less.
- the present invention comprises the steps of melting the polyester containing 85 mol% or more of the ethylene terephthalate unit by extruding while passing through a nozzle to form a discharge yarn; Spinning the discharge yarn to form undrawn yarn; Manufacturing the yarn by passing the undrawn yarn through a drawing roller and extending the total draw ratio to 1.60 or less; Weaving the yarn by twisting the yarn up and down at 300 to 500 twist / meter; And dipping the woven yarn through the weaving step in the dipping solution of epoxy and Pexul, and then drying, stretching and heat setting, and then immersing in resorcinol formalin latex (RFL), and then drying and heat setting the tire cord.
- RTL resorcinol formalin latex
- Tire cords using yarns manufactured according to the present invention are significantly improved in physical properties as the temperature rises compared to the conventional tire cords, and the heat resistance characteristics of the tire cords are excellent.
- the rolling resistance which is expressed as a measure of evaluation, is excellent, and handling and high speed durability are improved, and excellent tire driving performance can be exhibited.
- Figure 1 illustrates the spinning and stretching process of the polyester yarn according to the present invention.
- Polyester tire cord excellent in dimensional stability according to the present invention, the elongation (@ 2.25g / d) of the elongated polyester cord after twisting the polyester yarn and vulcanized for 20 minutes at 170 °C E 2 ,
- the median elongation (@ 2.25g / d) of the tire cord before vulcanization is E 1 , and when the difference between E 2 and E 1 is ⁇ E, the value of ⁇ E divided by E 1 is 0.5 or less. do.
- the intermediate elongation is a value measured at 25 ° C, 60 ° C, 90 ° C and 120 ° C, respectively.
- polyester yarn before the yarn is characterized in that the intrinsic viscosity of 0.90 to 1.00, the median elongation (@ 4.5g / d) value of 6.5% or less, shrinkage of 2.0% or less, E-S of 8.0% or less.
- Method for producing a polyester tire cord having excellent dimensional stability comprises the steps of melting the polyester containing 85 mol% or more of the ethylene terephthalate unit extruded through a nozzle to form a discharge yarn; Spinning the discharge yarn to form undrawn yarn; Manufacturing the yarn by passing the undrawn yarn through a drawing roller and extending the total draw ratio to 1.60 or less; Weaving the yarn by twisting the yarn up and down at 300 to 500 twist / meter; And dipping the woven yarn through the weaving step in the dipping solution of epoxy and Pexul, and then drying, stretching and heat setting, and then immersing in resorcinol formalin latex (RFL), and then drying and heat setting the tire cord.
- It may be prepared by a method including the step of preparing, but is not limited thereto.
- polyester containing 85 mol% or more of ethylene terephthalate unit is melted and extruded while passing through a nozzle to form a discharge yarn.
- the polyester may include a small amount of units derived from ethylene glycol and terephthalene dicarboxylic acid or derivatives thereof and one or more ester-forming components as copolymer units.
- ester forming components copolymerizable with ethylene terephthalate units examples include glycols such as 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, terephthalic acid, isophthalic acid, hexahydroterephthalic acid, stilbene Dicarboxylic acids such as dicarboxylic acid, bibenzoic acid, adipic acid, sebacic acid, azelaic acid.
- the polyester as described above is melted and extruded while passing through the nozzle 2 to form the discharge yarn 4.
- the discharge yarn 4 is passed through the cooling zone (3) to quench solidify.
- a heating device having a certain length is installed in the distance (L) of the hood from the distance from the nozzle 2 directly to the starting point of the cooling zone 3.
- This zone is called delayed cooling zone or heating zone, which has a length of 30 to 120 mm and a temperature of 320 to 400 ° C. (air contact surface temperature).
- an open quenching method, a circular closed quenching method, a radial outflow quenching method, and a radial inflow cooling method according to a method of blowing cooling air is used. in flow quenching) may be applied, but is not limited thereto.
- the temperature of the cooling air injected for rapid cooling in the cooling zone (3) is adjusted to 20 to 50 °C. Rapid cooling using such a sharp temperature difference between the hood and the cooling zone 3 is intended to increase the freezing point and spinning tension of the spun polymer to increase the orientation of the undrawn yarn and the formation of linking chains between the crystal and the crystal.
- the discharge yarn 4 solidified while passing through the cooling zone 3 is reduced to the friction coefficient between the single yarns, and is applied to the discharge yarns by an emulsion applying device 5 to which an oil agent having excellent stretchability and thermal efficiency is applied. It can be oiled by weight percent.
- the oiled release yarns are spun to form undrawn yarns.
- the spinning speed is preferably 3,500 to 4,500 m / min, but is not limited thereto.
- the unstretched yarn is stretched in multiple stages by passing through the stretching roller to prepare a yarn.
- the yarn 11 is formed by stretching the yarn having passed through the first stretching roller 6 through a series of stretching rollers 7, 7, 8, 9 and 10 by a spin draw method to a total draw ratio of 1.60 or less. Done.
- the unstretched yarn may be drawn in multiple stages of 1 to 4 stages, and each of the stretching roller temperatures is near the glass transition temperature of the unstretched yarn or lower than 95 ° C, but the stretching roller 9 temperature is 200 to 250 ° C. It is preferable to heat-process it.
- the stretching roller 9 temperature is less than 200 ° C.
- the degree of crystallinity and crystal size may not increase in the stretching process, and thus the strength and thermal stability of the yarn may not be expressed, resulting in low morphological stability at high temperatures, and the final stretching roller 9 temperature.
- the temperature exceeds 250 ° C., the microstructure of the yarn becomes uneven such that crystals are decomposed so close to the melting point that the strength of the yarn may be lowered.
- the winding speed of the stretched yarn is not particularly limited, but is preferably 5,500 to 6,500 m / min. If the winding speed is less than 5,500m / min productivity is lowered, if the winding speed is more than 6,500m / min cutting occurs during winding and workability is reduced.
- Polyester yarn prepared by the above method is preferably an intermediate elongation (@ 4.5g / d) value of 6.5% or less, shrinkage of 2.0% or less, ES of 8.0% or less, if the value is out of the above strength at high temperature It is not preferable because it is lowered and the shrinkage rate is increased and the shape stability is lowered.
- the tire cord is manufactured by twisting, weaving and dipping using the manufactured polyester yarn.
- the polyester yarn prepared above is stretched and woven to 300 to 500 twist / meter.
- the twisted yarn is manufactured by adding a twisted twist to a polyester yarn followed by a twisted twist, and in general, the upper twisted and the lower twisted lead is subjected to the same softening (level of twist) or other softening as necessary.
- the number of years of the polyester tire cord is the same as the upper / lower edge is 300/300 TPM (Twist Per Meter) to 500 to 500 TPM.
- TPM Torist Per Meter
- the manufactured tire cords can be easily maintained in a straight line without exhibiting rotation or twisting, thereby maximizing physical properties.
- the upper and lower stations are less than 300/300 TPM, the extension of the raw cord is reduced and fatigue fatigue easily decreases, and when it exceeds 500/500 TPM, the strength is largely unsuitable for the tire cord.
- the woven yarn is weighed in a dipping solution of epoxy and Pexul, then dried, stretched and heat set, and then immersed in resorcinol formalin latex (RFL), followed by drying and heat setting to manufacture a tire cord.
- RTL resorcinol formalin latex
- the drying should be avoided to be treated rapidly at high temperature, it is preferable to perform for 180 to 220 seconds at 90 to 180 °C.
- the drying temperature is less than 90 °C may not be enough drying
- when drying and heat treatment may be a gel due to the dipping liquid resin
- if it exceeds 180 °C may be due to the rapid drying due to the gel due to the dipping liquid resin
- Non-uniform adhesion of the cord with the dip liquid resin may occur.
- the heat setting is carried out so that the cord impregnated in the dip liquid resin has an appropriate adhesive force with the tire rubber, and the heat setting temperature is preferably made at 220 to 250 ° C. for 50 to 90 seconds.
- the tire cord prepared as described above has an elongation (@ 2.25g / d) of E 2 after vulcanization at 170 ° C. for 20 minutes and an elongation (@ 2.25g / d) of the tire cord before vulcanization of E 1.
- E 2 and E 1 the difference between E 2 and E 1 is ⁇ E, the value obtained by dividing the ⁇ E value by E 1 is 0.5 or less.
- a solid-state polymerized polyester chip having an intrinsic viscosity (I.V.) of 1.10 and a moisture content of 10 ppm containing 220 ppm of antimony metal was prepared.
- the prepared chip was melt-spun into a spin draft as shown in Table 1 at a temperature of 290 °C using an extruder. Thereafter, the discharged yarn was solidified by passing through a heating zone of 60 nm in length (atmosphere temperature 340 ° C.) and a cooling zone of 500 mm in length (20 ° C., cooling air blowing with a wind speed of 0.5 m / s) immediately after the nozzle, and then a solvent applied spinning emulsion. It was oiled with (containing 70% paraffin oil component). The unstretched yarn was wound at a spinning speed as shown in Table 1 below, and after multi-stretching, the final yarn was wound up at a speed as shown in Table 1 below.
- the cord yarn was immersed in an adhesive solution of epoxy resin and Pexul in a dipping tank, and then 150 seconds under 4.0% elongation at 170 °C in a dry area Dry, heat set at 150 ° C. under 3.0% elongation at 245 ° C. for 150 seconds, then again immerse in resorcinol formalin latex (RFL), then dry at 170 ° C. for 100 seconds and heat at 245 ° C. under 4.5% elongation for 40 seconds.
- RTL resorcinol formalin latex
- Instron's slow-extension type tensile tester is used.
- the tire cord is twisted with 80 TPM (Twist Per Meter) to the stretched yarn, followed by 250 mm of sample length. Measure at a speed of 300 m / min.
- the ratio of the length (L0) measured at a static load of 0.05 g / d and the length (L1) after treatment at a static load of 0.05 g / d at 177 ° C. for 2 minutes at 25 ° C. and 65% RH for 24 hours is used. Measure dry heat shrinkage.
- intermediate elongation (E) Elongation under a constant load
- S dry heat shrinkage of the above (3)
- ES the sum of the intermediate elongation (E) and dry heat shrinkage (S) is ES Is called.
- vulcanizing a tire changes the shrinkage and middle elongation of the cord.
- the sum of shrinkage and median elongation is similar to the concept of modulus in the cord after the tire is fully manufactured.
- the E-S value is utilized as a physical property value that can determine the superiority of the code performance in tire manufacturing.
- the tire having a low E-S value has an effect of improving the uniformity of the tire because the deformation amount due to heat is small, thereby improving the uniformity of the entire tire. Therefore, in the case of a tire using a cord having a low E-S value, since tire uniformity is more effective than a tire using a high cord, it is possible to improve tire performance.
- Relative viscosity number of drops of sample / number of drops of solvent
- Intrinsic Viscosity 1/4 ⁇ (R.V.-1) / Concentration + 3/4 ⁇ (ln R.V./Concentration)
- the degree of crystallinity is measured using a density gradient tube by the density method. Assuming that the density of the crystal region is ⁇ c , the density of the amorphous region is ⁇ a , and the density of the sample, the crystallinity (X) is calculated by the following equation.
- Example 1 0.93 1540 10.25 6.7 6.0 19.5 1.9 7.9
- Example 2 0.93 1540 10.00 6.5 6.2 20.2 1.6 7.8
- Example 3 0.93 1540 9.95 6.5 6.3 20.5 1.5 7.8
- Comparative Example 1 0.93 1540 13.60 8.8 5.0 11.1 5.5 10.5 Comparative Example 2 0.93 1540 13.40 8.7 5.2 12.0 5.3 10.5
- Example 1 18.9 4.5 19.5 0.6 6.0
- Example 2 18.8 4.5 20.1 0.6 5.9
- Example 3 18.7 4.5 21.9 0.5 5.1 Comparative Example 1 23.3 4.0 15.1 2.0 5.1 Comparative Example 2 22.8 3.9 17.9 2.0 5.0 60 °C Strong (kg) Critical (E (25) 1 ,%, @ 2.5g / d) Body cut (%)
- Example 1 18.5 5.5 28.2
- Example 2 18.6 5.8 28.4 Example 3 18.5 5.7 28.2 Comparative Example 1 21.2 4.9 15.8 Comparative Example 2 19.8 4.6 17.7 90 °C Strong (kg) Critical (E (25) 1 ,%, @ 2.5g / d) Body cut (%)
- Example 2 17.4 6.6 29.8
- Example 3 17.2 6.5 30.1 Comparative Example 1 13.9 5.5 16.1
- the tire cords prepared in Examples 1 to 3 of the present invention are superior in shape stability index (ES) and intermediate elongation values compared to the tire cords prepared in Comparative Example 1, and Tire cords manufactured in Examples 1 to 3 were found to be excellent in dimensional stability because the high temperature modulus difference ratio (difference before and after vulcanization) was 0.5 or less.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Tires In General (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Artificial Filaments (AREA)
Abstract
Description
방사속도(m/min) | 권취속도(m/min) | 연신비 | |
실시예 1 | 3900 | 6000 | 1.54 |
실시예 2 | 3950 | 6000 | 1.52 |
실시예 3 | 4000 | 6000 | 1.50 |
비교예 1 | 2800 | 6000 | 2.14 |
비교예 2 | 2850 | 6000 | 2.11 |
배향도(△n, ×103) | 밀도(g/cm3) | 결정화도(%) | |
실시예 1 | 70.0 | 1.3614 | 23.5 |
실시예 2 | 72.0 | 1.3628 | 24.7 |
실시예 3 | 75.0 | 1.3703 | 31.2 |
비교예 1 | 58.0 | 1.3484 | 12.0 |
비교예 2 | 62.1 | 1.3514 | 14.7 |
고유점도(dl/g) | 데니어 | 강력(kg) | 강도(g/d) | 중신(%, @4.5g/d) | 절신(%) | 수축율(%) | E-S(%) | |
실시예 1 | 0.93 | 1540 | 10.25 | 6.7 | 6.0 | 19.5 | 1.9 | 7.9 |
실시예 2 | 0.93 | 1540 | 10.00 | 6.5 | 6.2 | 20.2 | 1.6 | 7.8 |
실시예 3 | 0.93 | 1540 | 9.95 | 6.5 | 6.3 | 20.5 | 1.5 | 7.8 |
비교예 1 | 0.93 | 1540 | 13.60 | 8.8 | 5.0 | 11.1 | 5.5 | 10.5 |
비교예 2 | 0.93 | 1540 | 13.40 | 8.7 | 5.2 | 12.0 | 5.3 | 10.5 |
25℃ | |||||
강력(kg) | 중신(E(25)1, %, @2.5g/d) | 절신(%) | 수축율(%) | E-S(%) | |
실시예 1 | 18.9 | 4.5 | 19.5 | 0.6 | 6.0 |
실시예 2 | 18.8 | 4.5 | 20.1 | 0.6 | 5.9 |
실시예 3 | 18.7 | 4.5 | 21.9 | 0.5 | 5.1 |
비교예 1 | 23.3 | 4.0 | 15.1 | 2.0 | 5.1 |
비교예 2 | 22.8 | 3.9 | 17.9 | 2.0 | 5.0 |
60℃ | |||||
강력 (kg) | 중신 (E(25)1, %, @2.5g/d) | 절신(%) | |||
실시예 1 | 18.5 | 5.5 | 28.2 | ||
실시예 2 | 18.6 | 5.8 | 28.4 | ||
실시예 3 | 18.5 | 5.7 | 28.2 | ||
비교예 1 | 21.2 | 4.9 | 15.8 | ||
비교예 2 | 19.8 | 4.6 | 17.7 | ||
90℃ | |||||
강력 (kg) | 중신 (E(25)1, %, @2.5g/d) | 절신(%) | |||
실시예 1 | 17.3 | 6.6 | 28.6 | ||
실시예 2 | 17.4 | 6.6 | 29.8 | ||
실시예 3 | 17.2 | 6.5 | 30.1 | ||
비교예 1 | 13.9 | 5.5 | 16.1 | ||
비교예 2 | 17.7 | 4.9 | 15.1 | ||
120℃ | |||||
강력 (kg) | 중신 (E(25)1, %, @2.5g/d) | 절신(%) | |||
실시예 1 | 15.5 | 7.1 | 29.5 | ||
실시예 2 | 15.6 | 7.1 | 30.1 | ||
실시예 3 | 15.6 | 7.1 | 29.6 | ||
비교예 1 | 15.2 | 6.0 | 14.4 | ||
비교예 2 | 16.7 | 5.4 | 17.9 |
25℃ | ||||
강력(kg) | 중신(E(25)2, %, @2.5g/d) | 절신(%) | E(25)/E(25)1 | |
실시예 1 | 19.1 | 6.8 | 27.0 | 0.5 |
실시예 2 | 19.0 | 6.8 | 26.5 | 0.5 |
실시예 3 | 18.8 | 6.9 | 27.1 | 0.5 |
비교예 1 | 22.8 | 8.0 | 20.1 | 1.0 |
비교예 2 | 22.4 | 7.8 | 22.5 | 1.0 |
60℃ | ||||
강력(kg) | 중신(E(25)2, %, @2.5g/d) | 절신(%) | E(25)/E(25)1 | |
실시예 1 | 18.5 | 7.3 | 28.2 | 0.3 |
실시예 2 | 18.4 | 7.4 | 29.1 | 0.3 |
실시예 3 | 18.3 | 7.6 | 29.3 | 0.3 |
비교예 1 | 20.2 | 9.1 | 21.3 | 0.9 |
비교예 2 | 19.3 | 8.5 | 21.4 | 0.8 |
90℃ | ||||
강력(kg) | 중신(E(25)2, %, @2.5g/d) | 절신(%) | E(25)/E(25)1 | |
실시예 1 | 16.9 | 8.3 | 30.1 | 0.3 |
실시예 2 | 16.7 | 8.4 | 31.2 | 0.3 |
실시예 3 | 16.6 | 8.3 | 30.9 | 0.3 |
비교예 1 | 18.2 | 9.9 | 19.3 | 0.8 |
비교예 2 | 17.6 | 9.0 | 20.5 | 0.8 |
120℃ | ||||
강력(kg) | 중신(E(25)2, %, @2.5g/d) | 절신(%) | E(25)/E(25)1 | |
실시예 1 | 16.0 | 8.9 | 27.5 | 0.3 |
실시예 2 | 15.9 | 9.0 | 28.1 | 0.3 |
실시예 3 | 15.8 | 9.0 | 28.0 | 0.3 |
비교예 1 | 16.5 | 10.7 | 18.5 | 0.8 |
비교예 2 | 16.1 | 9.5 | 21.6 | 0.8 |
Claims (4)
- 폴리에스테르 원사를 연사하고 디핑 처리한 폴리에스테르 타이어 코드에 있어서,상기 타이어 코드를 170℃에서 20분 동안 가류한 후의 중간신도(@2.25g/d)가 E2이고,상기 가류 전의 타이어 코드의 중간신도(@2.25g/d)가 E1이며,상기 E2와 E1의 차이 값이 △E일 때,상기 △E 값을 E1으로 나눈 값이 0.5 이하인 폴리에스테르 타이어 코드.
- 제 1항에 있어서,상기 중간신도는 각각 25℃, 60℃, 90℃, 120℃에서 측정한 값인 폴리에스테르 타이어 코드.
- 제 1항에 있어서,상기 연사하기 전의 폴리에스테르 원사는 고유점도가 0.90 내지 1.00, 중간신도(@4.5g/d) 값이 6.5% 이하, 수축율이 2.0% 이하, 중간신도와 건열수축률의 합(E-S)이 8.0% 이하인 폴리에스테르 타이어 코드.
- 에틸렌테레프탈레이트 단위를 85몰% 이상을 함유하는 폴리에스테르를 용융하여 노즐을 통과시키면서 압출하여 방출사를 형성하는 단계;상기 방출사를 방사하여 미연신사를 형성하는 단계;상기 미연신사를 연신 롤러를 통과시켜 총연신비가 1.60 이하로 다단 연신시켜 원사를 제조하는 단계;상기 원사를 300 내지 500 twist/meter로 상하연 연사하여 제직하는 단계; 및상기 제직하는 단계를 통해 제직된 사를 에폭시와 펙설(Pexul)의 디핑액에 침적한 다음 건조하고 연신 및 열고정한 후, 다시 레조시놀 포르말린 라텍스(RFL)에 침적한 다음 건조하고 열고정시켜 타이어코드를 제조하는 단계를 포함하는 폴리에스테르 타이어코드의 제조방법.
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US15/102,115 US10017883B2 (en) | 2014-01-16 | 2015-01-13 | Polyester tire cord with excellent dimensional stability and method for manufacturing the same |
EP15737484.4A EP3095899B1 (en) | 2014-01-16 | 2015-01-13 | Polyester tire cord with excellent dimensional stability and method for manufacturing same |
JP2016557864A JP2017503937A (ja) | 2014-01-16 | 2015-01-13 | 寸法安定性が優れたポリエステルタイヤコード及びその製造方法 |
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EP0331501B1 (en) * | 1988-03-03 | 1993-01-20 | Bridgestone Corporation | Pneumatic radial tyres |
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EP0331501B1 (en) * | 1988-03-03 | 1993-01-20 | Bridgestone Corporation | Pneumatic radial tyres |
KR0140229B1 (ko) * | 1988-10-28 | 1998-07-01 | 제라드 피이. 루우니 | 칫수안정성이 우수한 타이어 코드용 폴리에스테르 멀티필라멘트사 제조공정 및 연신폴리에틸렌 테레프탈레이트 멀티필라멘트사 |
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KR101314226B1 (ko) * | 2012-09-04 | 2013-10-02 | 주식회사 효성 | 치수안정성이 우수한 폴리에스터 타이어코드 및 이의 제조방법 |
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KR20150085685A (ko) | 2015-07-24 |
US20160312388A1 (en) | 2016-10-27 |
US10017883B2 (en) | 2018-07-10 |
EP3095899A4 (en) | 2016-12-14 |
JP6649553B2 (ja) | 2020-02-19 |
EP3095899A1 (en) | 2016-11-23 |
JP2018150669A (ja) | 2018-09-27 |
KR101559517B1 (ko) | 2015-10-19 |
JP2017503937A (ja) | 2017-02-02 |
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