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
  • 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
  • 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
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/005—Synthetic yarns or filaments
  • D04H3/009—Condensation or reaction polymers
  • D04H3/011—Polyesters
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
  • D04H3/07—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments otherwise than in a plane, e.g. in a tubular way
  • D04H3/077—Stick, rod or solid cylinder shaped
• • 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
  • 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 relates to a high-strength polyester fiber for ropes used in anchoring, mooring, towing, etc. of the ship, and to a method of manufacturing the same. More specifically, the present invention has excellent mechanical properties and abrasion resistance, low moisture absorption, light resistance, and shock absorption performance.
• the present invention relates to a polyester fiber having a high elastic recovery rate (Recovered Work Ratio) and a manufacturing method thereof.
• Marine ropes used for anchoring, mooring, towing ships, or industrial material ropes used in various construction sites have been developed to secure high mechanical strength.
• polyester represented by polyethylene terephthalate (hereinafter referred to as TET) is excellent in mechanical strength, chemical resistance, etc., and thus is widely used in fiber, film or resin applications.
• TET polyethylene terephthalate
• the existing polyester fiber exhibits the low elongation characteristics of the high modulus, it is not enough to stiffen the deformation caused by the movement of the ship in accordance with the change of the ocean at the time of mooring the yarn, such as yarn cutting occurs. there was.
• the present invention exhibits properties of high strength, high elongation, high elastic recovery to be used in marine ropes or industrial material ropes, polyester fibers having excellent mechanical properties and wear resistance, low moisture absorption, light resistance, impact absorption performance, etc. To provide. .
• the present invention also provides a method for producing the polyester fiber. ⁇
• the present invention also provides a fiber rope comprising the polyester fiber.
• the invention shows that the elastic recovery rate at 10% deformation of the maximum load measured at room temperature is h or more, the elastic recovery rate at 20% deformation of the maximum load is 50% or more, and the elastic recovery rate at 30% deformation of the maximum load This gives 40% or more of polyester sulfur oil.
• the present invention also provides a polyester polymer having an intrinsic viscosity of 1.2 dl / g or more.
• It provides a method for producing the polyester fiber comprising the step of producing a polyester non-drawn yarn by melt spinning at 270 to 310 ° C, and stretching the polyester non-drawn yarn.
• the present invention also provides a polyester fiber rope comprising the polyester fiber.
• a polyester fiber that can be used as a rope for marine or industrial materials according to a specific embodiment of the present invention, a manufacturing method thereof, and a fiber rope including the same will be described in more detail.
• this is presented as an example of the invention, whereby the scope of the invention is not limited, it is apparent to those skilled in the art that various modifications to the embodiments are possible within the scope of the invention.
• 'polyester fiber' in the present invention generally refers to a fibrous polymer that is esterified by reacting with a dicarboxylic acid such as a diol compound and terephthalic acid, and is used to manufacture a 'rope for marine or industrial materials' of the present invention.
• a dicarboxylic acid such as a diol compound and terephthalic acid
• Polyester is more preferably in the manufacture of fiber rope in particular, has excellent resistance to moisture, it followed that for marine and "replace ropes.
• polyester fiber in the present invention all polyester fibers which are commonly used may be used.
• PET polyethylene terephthalate
• PEN polyethylene naphthalate
• PBT polybutylene terephthalate
• Polyalkylene terephthalate such as polycyclonucleic acid dimethylene terephthalate (PCT), a copolyester etc. which make it a main component, etc. can be used.
• PCT polycyclonucleic acid dimethylene terephthalate
• copolyester etc. which make it a main component, etc.
• polyethylene terephthalate is more preferable for use as a marine rope in terms of physical properties such as strength and elongation.
• polyester has a lower polymerization efficiency than nylon and is severely hydrolyzed by heat and moisture, and thus, it is difficult to secure a high molecular weight molecular chain due to the decomposition of many molecular chains when the yarn is manufactured.
• high elongation is given during spinning, and thus, high strength, low elongation, and high modulus properties are obtained.
• polyester has a short molecular chain, it is difficult to secure a high elastic recovery rate.
• Nylon on the other hand, has a long molecular chain and can express properties of low modulus with high strength, high elongation, and high elastic recovery.
• the elastic recovery rate of the rope can act as a buffer against cutting and external stratification against repeated deformations of the external environment such as the ocean becoming rough.
• external environmental shocks can be transmitted directly to the vessel, causing damage to the vessel.
• the present invention by optimizing the elastic recovery of the yarn to a high level of (Recovered Work Ratio) in order to exhibit the properties of the polyester fiber, particularly, recovery from repeated deformation, according to the external environmental changes when making the rope It can be effectively applied to the manufacture of fiber ropes for marine or industrial materials, which can provide sufficient strength and elongation and maintain long-term shock absorption performance.
• the present invention is provided with a polyester fiber having a predetermined characteristic.
• the polyester fiber has an elastic recovery rate of 70% or more at 10% deformation of the maximum load measured at room temperature and an elastic recovery rate of 50% or more at 20% deformation of the maximum load, and at 30% deformation of the maximum load.
• the elastic recovery rate of may be 40% or more.
• polyester fiber contains polyethylene terephthalate (PET) as a main component.
• PET polyethylene terephthalate
• the PET is a variety of additives can be added in the manufacturing step, in order to ensure excellent mechanical properties when producing a polyester fiber rope includes at least 70 mol% or more, more preferably 90 mol% or more can do.
• PET polyethylene terephthalate
• PET refers to a case where the polyethylene terephthalate (PET) polymer is not less than 70 mol% without particular description.
• Polyester fiber according to an embodiment of the present invention is manufactured under the melt spinning and stretching conditions described below, it is to show the excellent properties of the elastic recovery due to repeated deformation at room temperature compared to the existing polyester yarn.
• polyester generally exhibits low elastic recovery rate due to the short molecular chain, and when the fiber rope is manufactured, the impact absorption performance and wear resistance of the long time are significantly decreased.
• the polyester fiber obtained through the controlled melt spinning and stretching process exhibits a high elastic recovery rate characteristics, thereby improving the interlaminar absorption performance of the fiber rope and increase the rope life.
• the polyester fibers of the present invention have such high elastic recovery rate and minimized elongation. Due to the high elastic recovery rate characteristics, the polyester fiber has a low elastic recovery, solves the problems of low wear resistance and impact absorption performance degradation in the fiber rope including high modulus, low elongation fibers, and improved with excellent mechanical properties Shock absorption performance and rope life could be increased.
• the polyester fiber has an elastic recovery rate of at least 70%, preferably at least 75%, more preferably at least 80%, and at 20% deformation of the maximum load, measured at room temperature at 10% deformation of the maximum drop.
• the elastic recovery of at least 50%, preferably at least 52%, more preferably at least 54%, the elastic recovery at 30% deformation of the maximum load is at least 40%, preferably at least 41%, more preferably Can be more than 423 ⁇ 4 ⁇ Due to this high elastic recovery rate properties, the polyester fiber solves the problems of low abrasion resistance and impact absorption performance degradation in the fiber rope including the existing high modulus low-fiber fibers, and excellent mechanical Along with the physical properties, the shock absorption performance and the rope life can be extended.
• the elastic recovery rate (Recovered Work Ratio) of the polyester fiber is a percentage value of the recovered work (Recovered Work) to the total work (Total Work) as shown in the following formula 1 in the stress-strain graph obtained during the tensile test Can be (3 ⁇ 4).
• the total work is a value corresponding to the area of the elongation curve measured by measuring the elongation curve of the yarn at room temperature by the method of ASTM D 2256 standard of the American Material Testing Association, as shown in FIG. 2.
• Work is a value corresponding to the area of the elongation curve after measuring 10 times, 20%, 30% of the maximum load as shown in FIG.
• the elastic recovery rate of the fiber is as low as that of conventional polyester fibers, it may not be sufficient for deformation due to the movement of the ship due to the change of the ocean during ship mooring. However, after a certain period of time, the elastic recovery rate is lost, and the ability to hold the vessel when mooring the vessel is lost.
• the polyester fiber of the present invention can be used as marine rope used in anchoring, mooring, towing of ships, or rope for industrial materials used in various construction sites, etc. It is characterized by optimizing elastic recovery rate (Work Recovery) to maintain and absorb the impact of deformation.
• the polyester fiber has a maximum load measured at room temperature, that is, the elastic recovery rate when strained by 10%, 20%, 30% of the maximum tensile strength in the elongation curve measured at room temperature, respectively 70% or more, 50% or more, 40% or more.
• the reason why the fiber is deformed up to 30% is the condition considering the maximum degree of deformation when applied to rope design and ship mooring.
• the elastic recovery rate is more important at 10% deformation of the peak load because the deformation caused by the external environment, which is most likely to be encountered when the ship is moored, is within 10% of the peak load.
• the force to be held is only within 10% of the maximum load, The force to hold the ship as it moves can be designed to hold at 30% of the rope.
• the polyester fibers have an improved intrinsic viscosity compared to previously known polyester fibers, that is, at least 0.8 dl / g or 0.8 dl / g to 1.2 dl / g, preferably at least 0.85 dl / g or 0.85 dl / g to 1.15 dl / g, more preferably 0.90 dl / g or more, or 0.90 dl / g to 1.10 dl / g.
• the intrinsic viscosity is preferably secured in this range in order to express high mechanical properties and to have excellent wear resistance during rope production using polyester fibers.
• the intrinsic viscosity of the yarn should be 0.8 dl / g or more to exhibit high strength with low stretching to satisfy the required strength as a fiber rope for marine or industrial materials, or to exhibit physical properties with high stretching. You can be out there.
• a low stretching to secure a long molecular chain it is possible to increase the entanglement and disorder between the molecular chains to prevent the slip between the molecular chains due to external deformation. If not, that is, if a short molecular chain is secured, the deformation between the molecular chains is caused by external deformation, resulting in morphological deformation, and thus the mechanical and physical properties of the rope are changed. It becomes impossible.
• the polyester fiber of the present invention by maintaining a high degree of intrinsic viscosity, it is possible to ensure a high strength characteristics that are sufficient to be effectively used for anchoring, mooring, towing, etc. of the vessel and at the same time More improved shock absorption characteristics can be given to rolling and the like.
• a fiber rope for marine or industrial materials which simultaneously exhibits excellent mechanical properties, wear resistance, and shock absorbing effect by using polyester fibers exhibiting high elastic recovery and high elongation, preferably high intrinsic viscosity. Therefore, using the polyester fiber, the moisture when applied as a fiber rope for marine or industrial materials Significantly lowers the strong deterioration of the absorption rate and ultraviolet rays, secures excellent mechanical properties and strong retention rate, and improves the impact absorption performance of the fiber rope against the rolling of ships or supports due to external changes such as algae circulation or atmospheric circulation. And the like can be significantly reduced.
• the polyester fiber according to an embodiment of the invention has a tensile strength of at least 8.0 g / d or 8.3 g / d to 11.0 g / d, preferably 8.5 g / d or more or 8.5 g / d to 10.0 g / d) and elongation at break may be at least 15% or 15% to 30%, preferably at least 16% or 16% to 28%.
• the polyester fiber may exhibit a dry heat shrinkage of 7% or less, or 1.5% to 7%. The dry heat shrinkage is based on the value measured under the condition of applying a fixed load of 0.01 g / d for 2 minutes at 177 ° C.
• the polyester fiber of the present invention can not only secure strength and physical properties to an excellent degree, but also wear resistance and UV strength retention when manufactured from fiber rope It can exhibit excellent performance from the back.
• the polyester fiber may have a single yarn fineness of 21 DPF or less or 3 to 21 DPF, preferably 20 DPF or less or 4 to 20 DPF.
• the polyester fiber In order for the polyester fiber to be effectively used for marine rope or industrial material rope, etc., it is produced and produced in terms of productivity, and the lower the fineness for physical properties, the better the total fineness of the applicable polyester fiber is 900 denier or more. Or 900 to 4,500 denier, preferably at least 1,000 denier or 1,000 to 4,000 denier.
• the polyester fiber may further include an additive as necessary to prevent damage to the yarn during spinning, improve the friction resistance of the yarn, and minimize the strong degradation.
• the polyester fiber that is, the polyester yarn is one selected from the group consisting of Ti0 2 , Si0 2 , BaS0 4, etc.
• the above inorganic additives may be included.
• the inorganic additive may be included in an amount of 100 to 1,500 ppm, preferably 200 to 1,200 ppm with respect to the polyester fiber, that is, polyester yarn.
• the inorganic additive may be included at 100 ppm or more, preferably 200 ppm in terms of radioactivity, and may be included at 1,500 ppm or less, preferably 1,200 ppm or less in terms of excellent potency. ⁇
• the polyester fiber according to an embodiment of the invention as described above may be produced by melt spinning the polyester polymer to produce a non-drawn yarn, a method of stretching the non-drawn yarn, as described above, Specific conditions of the step or the method of proceeding is directly or indirectly reflected in the physical properties of the polyester fiber can be produced a polyester fiber having the above-described physical properties.
• the elastic recovery rate due to repeated deformation is significantly superior to the existing polyester yarn, that is, the elastic recovery at 10% deformation of the maximum load measured at room temperature is 70% or more, and the maximum load It has been found that it is possible to obtain a polyester fiber having an elastic recovery at 50% or more at 20% deformation of and a 40% or more elastic recovery at 30% deformation of the maximum load. Therefore, such a polyester fiber exhibits high elastic recovery rate, high strength, and high elongation range at the same time, and thus may be preferably applied to marine ropes or industrial material ropes having excellent mechanical properties, wear resistance, and layer absorption.
• the method of manufacturing the polyester fiber is a step of producing a polyester non-drawn yarn by melt spinning a polyester polymer having an intrinsic viscosity of 1.2 dl / g or more at 270 ° C to 310 ° C, and stretching the polyester non-drawn yarn It includes.
• FIG. 1 is a process diagram schematically showing a polyester fiber manufacturing process including the melt spinning and stretching step according to an embodiment of the present invention.
• the method of manufacturing the polyester fiber for rope according to the present invention melts the polyester chip manufactured as described above, and cools the molten polymer spun through the detention with quenching-air. And emulsify the unstretched yarn using (120) (or oil-jet) emulsion, and use the pre-integrator ( € 1 ⁇ ) (130) It can disperse
• the multi-stretching device 141-146
• a polyester unstretched yarn is first prepared by melt spinning a polymer having a high viscosity including polyethylene terephthalate.
• the melt spinning process is preferably performed at a low temperature range so as to minimize thermal decomposition of the polyester polymer.
• the low-temperature radiation such as "to , 270 to 310 ° C., preferably 280 to 305 ° C., more preferably can be carried out at a temperature of 282 to 298 ° C.
• the spinning temperature refers to the extruder temperature
• the melt spinning process is performed in excess of 310 ° C.
• thermal decomposition of the polyester polymer occurs in a large amount, thereby decreasing molecular weight and lowering the intrinsic viscosity.
• the increase may be large, and the surface damage of the yarn may result in deterioration of overall physical properties, which is undesirable.
• the melt spinning process is performed at less than 270 ° C, melting of the polyester polymer may be difficult, and radioactivity may be deteriorated by N / Z surface angle, and the melt spinning process may be performed within the above temperature range.
• the said polyester polymer contains polyethylene terephthalate (PET) as a main component.
• PET polyethylene terephthalate
• the polyethylene terephthalate (PET) is a variety of additives can be added in the manufacturing step, in order to ensure excellent mechanical properties when manufacturing the fiber rope at least 70 mol%, more preferably 90 mol% It may contain the above.
• the polyester polymer may further include one or more inorganic additives selected from the group consisting of Ti0 2 , Si0 2 , BaS0 4 , and the like, as necessary.
• the inorganic additive may be included in the content of 100 to 1,200 ppm, preferably 200 to 1,000 ⁇ relative to the polyester polymer.
• the inorganic additive may be included at 100 ppm or more, preferably 200 ppm in terms of radioactivity, and may be included in an amount of 1,500 ppm or less and preferably 1,200 ppm or less in terms of excellent potency.
• the melt spinning process of PET is carried out at such low temperature range, minimizing degradation reaction of polyester polymer to maintain high intrinsic viscosity to ensure high molecular weight, so that high stretching ratio is not applied in subsequent stretching process. It has been found that high strength yarns can be obtained without being able to carry out such a low drawing process, thereby effectively lowering the modulus so that polyester fibers satisfying the above-described physical properties can be obtained.
• the melt spinning process may be carried out at a lower spinning tension in order to minimize the degradation reaction of the polyester polymer, that is, to minimize the spinning tension, for example, to speed up the melt dissipation of the polyester polymer. It can be adjusted at a low speed of 300 to 1,000 m / min, preferably from 350 to 700 m / min. As such, the melt spinning process of the polyester polymer is optionally performed under low spinning tension and low spinning speed, so that degradation reaction of the polyester polymer can be further minimized.
• the unstretched yarn obtained through the melt spinning process is 0.8 dl / g or more or 0.8 dl / g to 1.2 dl / g, preferably 0.85 dl / g or more It may exhibit an intrinsic viscosity of 0.85 dl / g to 1.2 dl / g, more preferably 0.9 dl / g or more or 0.9 dl / g to 1.2 dl / g.
• a high-viscosity polyester polymer for example, a polyester polymer having an intrinsic viscosity of 1.2 dl / g or more in the unstretched manufacturing process, melt through the spinning and drawing process, as much as possible to maintain such a high viscosity range can exhibit high strength at low elongation is desirable to reduce the modeul Russ effectively.
• the intrinsic viscosity is more preferably 2.0 dl / g or less in order to prevent molecular chain breakage and pressure increase due to the amount of discharge from the spinning pack due to the increase in the molten silver of the polyester polymer.
• the ⁇ ⁇ ⁇ chip has a single yarn fineness of 21 DPF or less
• the single yarn fineness of the fiber is preferably 4.0 DPF or more, and the single yarn fineness of the fiber is 20 DPF in order to increase the cutting angle efficiency. It is more preferable to make it become the following.
• PET unstretched yarn can be produced.
• This cooling process is preferably proceeded by a method of applying a cooling wind of 15 to 60 ° C., it is preferable to adjust the amount of knap angle air to 0.4 to 1.5 m / s in each of the corner wind temperature conditions.
• the PET non-drawn yarn showing various physical properties according to an embodiment of the present invention can be produced more easily.
• the non-drawn yarn is drawn to prepare a drawn yarn.
• the stretching process may be performed under a total draw ratio of 5.0 to 6.5, preferably 5.0 to 6.2.
• the polyester unstretched yarn is in a state of maintaining high intrinsic viscosity and low initial modulus by optimizing the melt spinning process. Therefore, when the drawing process is carried out under high drawing ratio conditions in excess of 6.5, it becomes over-stretched level, so that cutting or moor occurs in the drawn yarn. And a low elongation high modulus yarn can be produced by the high degree of fiber orientation.
• it may include a process of stretching, heat setting, and winding winding through a multi-stage Godet roller to wind up the winder.
• the stretching process may be performed after passing the undrawn yarn through a roller roller under the condition of 2% to 2.0% of the oil pickup amount.
• the relaxation is preferably 1% to 14%, and when less than 1%, it is difficult to express shrinkage, and as in the case of high elongation ratio conditions, high elongation low modulus fibers may be difficult to manufacture as high fiber orientation is formed. If it exceeds 14%, the noise on the blast furnace increases, and workability cannot be secured.
• the stretching process may further perform a heat-setting process for heat-treating the undrawn yarn under a silver degree of approximately 170 to 250 ° C., preferably 175 to 240 ° C.
• it can be heat-treated at a temperature of 180 to 245 ° C.
• the temperature is less than 170 ° C, the thermal effect is inadequate and the relaxation efficiency decreases, making it difficult to achieve a shrinkage rate.
• the temperature exceeds 250 ° C, the yarn strength decreases due to pyrolysis and the occurrence of roller tar is increased. Can be degraded.
• the winding speed is 2,000 to 4,000 m / min, preferably 2,500 to It can be performed at 3,700 m / min.
• the polyester fiber of the present invention exhibits high strength, high elongation, high elastic recovery rate characteristics, such as marine rope used in anchoring, mooring, towing of ships, ropes for industrial materials used in various construction sites, etc. It can be used for various industrial materials.
• the polyester fiber of the present invention can produce a polyester fiber rope for marine or industrial materials through a process of plywood and twisted yarns.
• the fiber rope can be manufactured by using the same device for processes such as weaving and weaving.
• the fiber rope made of the polyester fiber of the present invention has a breaking strength of 0.67 ton / ⁇ or more, or 0.67 to 1.2 ton / ⁇ , preferably 0.69 ton / mm or more, more preferably per unit diameter of the rope. It can be more than 0.72 ton / ⁇ .
• the elongation at break may be at least 18% or at least 18% to 45%, preferably at least 20% and more preferably at least 24%.
• the fiber rope has a water absorption of at most 2%, preferably at most 1%, preferably It may be less than 0.5%, the water absorption of the fiber rope is 25 ° C, the relative humidity is shown under 65% and measured results.
• the strength of the fiber rope is 90% or more, preferably 95% or more, more preferably 98% or more, and the strength of the fiber rope after wetting the strength of the strength degradation and after UV irradiation It can be measured by the degree of strong degradation.
• the fiber rope may be subjected to a tensile test immediately at room temperature after immersion in water at room temperature for 30 minutes or more to measure the degree of strong degradation of water immersion (wetting), and after the water immersed in the fiber rope of the present invention
• Strength retention may be 90% or more, preferably 95% or more, more preferably 98% or more.
• the fiber rope can measure the degree of strong degradation after irradiating XENON ARC light for 100 hours at 40 ° C, relative humidity 65%, the strong retention after UV irradiation on the fiber rope of the present invention is It may be at least 90%, preferably at least 95%, more preferably at least 98%.
• the fiber rope made of the polyester fiber has an elastic recovery rate of at least 80%, preferably at least 85%, at 10% deformation of the maximum load measured at room temperature. And more preferably an elastic recovery rate of at least 90%, and "20% of the maximum load, strain at least 60%, preferably at least 61%, more preferably at least 62%, at 30% strain of the maximum load,
• the elastic recovery rate of may be 50% or more, preferably 51% or more, more preferably 52% or more.
• Ratio may be a percentage value (3 ⁇ 4>) of the recovered work for the total work as shown in the following Equation 2 in the stress-strain graph obtained during the tensile test.
• Recovered Work Ratio of Rope ⁇ (Recovered Work Ratio) / (Total Work Area) ⁇ ⁇
• the total work is a value corresponding to the area of the elongation curve when the elongation curve is shown by measuring the cutting force and the elongation of the rope at temperature, as shown in FIG. 2, and the recovered work. 2 is a value corresponding to the area of the elongation curve after measuring 10 times, 20%, 30% of the maximum load, and 10 times after pulling and releasing the elongation curve.
• the elastic recovery rate of the ropes is as low as that of conventional polyester fiber ropes, it is not possible to make a great deal of deformation due to the movement of the ship due to the change of the ocean during ship mooring. Not only that, but after a certain period of time, the elastic recovery rate is lost, and the ability to hold the ship at mooring time is lost.
• the polyester fiber rope of the present invention exhibits such excellent elongation at break and strong retention, while minimizing water absorption, thereby providing excellent mechanical properties in moored, mooring, towing, and various construction sites of the ship, and in response to external environmental changes. Effective Daewoong can extend the life of the rope and ensure the safety of the layer.
• a high elastic stiffness, elongation at break, strength in a predetermined range The back is optimized, and polyester fiber having excellent abrasion resistance, high retention rate, etc. with excellent mechanical properties is provided.
• polyester fibers are optimized by high strength, high elastic recovery rate, and high elongation, and thus have sufficient elongation and secure excellent mechanical properties and layer absorption performance. It is possible to manufacture polyester fiber ropes that minimize rough yarn cutting, remarkably improve the shock absorption performance and secure sufficient safety with excellent rope life even in the external environment such as roughness and severe rolling of ships.
• 1 is a process diagram schematically showing a polyester fiber manufacturing process according to an embodiment of the present invention.
• Figure 2 shows an example of the strength-elongation curve of a typical fiber, it is possible to measure the recovery rate (Recovered Work Ratio,%) from the area of this strength-elongation curve.
• Figure 3 shows the strength-elongation curves of polyester fibers according to Example 4 of the present invention.
• the polyester unstretched yarn was manufactured by melt spinning and cooling a polyester polymer having a predetermined intrinsic viscosity
• the unstretched yarn was stretched at a predetermined draw ratio and subjected to heat treatment to prepare a polyester fiber.
• the intrinsic viscosity of the polyester polymer and the spinning speed and spinning tension during the melt spinning process, spinning temperature conditions, elongation ratio, heat treatment silver are as shown in Table 1 below, the remaining conditions for the production of polyester fibers Normal conditions were followed.
• Tensile strength and elongation of polyester yarns were measured using the universal testing machine (Instron) by the method of the American material test standard ASTM D 2256, and universal testing machine (Instron) was used to measure the tensile strength and elongation of polyester yarn.
• the sample length was 250 mW
• the tensile velocity was 300 mW / min
• the initial load was set at 0.05 g / d.
• Testrite MK V equipment from Testrite, UK It was measured under conditions of adding a fixed load of 0.01 g / d for 2 minutes at 177 ° C.
• Single yarn fineness was measured by taking the yarn by 9,000 m and weighing it to obtain the total fineness of yarn (Denier) and dividing by the number of filaments.
• Example 2 Example 3
• Example 4 Example 5 Intrinsic Viscosity of Yarn (dl / g) 0.85 0.88 0.92 0.97 1.01
• Tensile Strength of Yarn (g / d) 9.2 9.3 9.2 9.4 9.4 3 ⁇ 4>) 16.3 17 17.5 18.2 19.5 Dry heat shrinkage of yarn (%) 5.0 5.5 5.8 5.4 5.0 Single yarn fineness (DPF) 12.5 10.4 13.0 12.5 10.4 Total fineness of yarn (de) 1,500 2, 000 2,500 3,000 4,000 Max load 103 ⁇ 4 Elastic Recovery rate 88 91 94 97 99 Maximum load 20% Elastic recovery rate (%) 54 56 58 59 60 Maximum load 30% Elastic recovery rate (%) 40 41 ⁇ 43 44 46 Comparative Examples 1 to 5
• a polyester fiber of Comparative Examples 1 to 5 was prepared according to the same method as Examples 1 to 5 except for the conditions described in Table 3 below.
• the lower rope was applied during the first weaving and the upper edge was applied during the second weaving to prepare a fiber rope.
• the 7 ply as the lower edge of the primary plywood, 4 ply to the second plywood, and 16 strands of the resulting plywood was added to make one strand (strand) to make the final rope made of the strand 8 strands.
• the fiber ropes had the same final fineness so that the diameter of the rope was 36 mm 3.
• the physical properties of the polyester fiber rope thus produced were measured by the following method. a) cutting strength and cutting elongation
• both ends of the rope were fixed to the loops, the fiber rope sample was 5M in length, and one loop was moved at a speed of 1M / min to measure / evaluate the strength / elongation at the time of the final breaking of the fiber rope by the method.
• the fiber ropes of Preparation Examples 1 to 5 prepared from Examples 1 to 5 and prepared from polyester fibers having a high elastic recovery rate are It can be seen that the cutting strength is 26.6 ton to 29.5 ton, and the elongation at break is 23.5% to 27.4%, which is very excellent.
• the fiber ropes of Preparation Examples 1 to 5 were all in the range of significantly low water absorption at 0.4 ° C at 25 ° C. and 65% relative humidity. It can be seen that the range of 99.8% to 100.5% and 99.5% to 99.9% is very good.
• the fiber ropes of Preparation Examples 1 to 5 simultaneously have excellent mechanical properties and excellent light resistance, water resistance, abrasion resistance, low moisture absorption rate, and shock absorption performance.
• Table 6 it was confirmed that the fiber ropes of Comparative Preparation Examples 1 to 5 manufactured using the polyester fibers of Comparative Examples 1 to 5 did not satisfy these characteristics.
• the fiber ropes of Comparative Production Examples 1 to 5 have a cutting strength of 22.0 ton to 24.5 ton and an elongation at break of only 13.53 ⁇ 4> to 15.8%, thereby significantly reducing the toughness of the rope.
• the toughness of the fiber rope is significantly reduced, it may not be possible to secure a sufficient mechanical properties when mooring or towing the vessel or applied to a construction site.
• the fiber rope of Comparative Preparation Example 6 using nylon fiber which is one of general synthetic fibers, has a water absorption of 4.2% at 25 ° C and a relative humidity of 65%, and is strong at UV protection and strong at wetting. Retention rates were found to drop significantly to 74.3% and 74.9%, respectively. As such, when the strong maintenance rate is not good, there may be a problem that the mechanical properties are sharply degraded in rough environmental conditions such as mooring the ship.

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• Chemical Kinetics & Catalysis (AREA)
• Crystallography & Structural Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Mechanical Engineering (AREA)
• Ropes Or Cables (AREA)
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• 2010
  • 2010-09-30 KR KR1020100095358A patent/KR101414224B1/ko active IP Right Grant
• 2011
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  • 2011-09-30 US US13/822,351 patent/US20130172516A1/en not_active Abandoned
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