Abstract: Disclosed is a high strength polyester fiber for a seat belt, and in particular, a polyester fiber for a seat belt, which has intrinsic viscosity of 0.8 to 1.5 dl/g, tensile strength of 8.8 g/d or more, and total fineness of 400 to 1800 denier. A method of preparing the fiber is disclosed. The polyester fiber includes filaments having high strength, low modulus, and high elongation to significantly lower shrinkage, while securing excellent mechanical properties, it is possible to manufacture a seat belt having excellent impact absorption and significantly improved abrasion resistance and heat resistant strength retention, even with a woven density of 260 yarns/inch or less.

Abstract: The present invention relates to an undrawn PET fiber and a drawn PET fiber those can provide a cap ply cord and the like showing more improved modulus and good dimensional stability, and a tire cord including the same. The undrawn PET fiber may be a fiber of which the crystallinity is 25% or more, the birefringence index is 0.085 to 0.11, the amorphous orientation factor (AOF) is 0.15 or less, and the melting temperature (Tm) is 258° C. or more.

Abstract: The present invention relates to a drawn PET fiber which has good dimensional stability and can be applied to a cap ply cord for a pneumatic tire, a PET tire cord, their preparation methods, and a tire including the same.

Abstract: The present invention relates to a poly(ethyleneterephthalate) drawn fiber, which is able to provide a poly(ethylene terephthalate) tire-cord showing superior strength and dimensional stability without a PCI process after tire vulcanization, a poly(ethylene terephthalate) tire-cord and a manufacturing method thereof. The poly(ethyleneterephthalate) drawn fiber has a predetermined L/S value of 2.0 kg/% or more after heat treatment at a temperature of 180° C. under an initial load of 0.02 g/d for 2 minutes.

Abstract: The present invention relates to a drawn PET fiber that can provide a cap ply cord and the like showing more improved modulus and good dimensional stability, a PET tire cord, and a tire including the same. The drawn PET fiber may be a fiber including 90 mol % or more of PET, of which the crystallinity is 53% or more, the amorphous orientation factor (AOF) is 0.15 or less, and the birefringence index is 0.14 to 0.16, after heat-treating the same at 230° C. for 1 minute under the initial load of 20g/1000d.

Abstract: The present invention relates to polyester fiber that can be used as fabric for an airbag. In particular, the present invention relates to a process for producing polyester fiber comprising conducting an esterification reaction of a dicarboxylic acid composition and glycol in a predetermined ratio; conducting a polycondensation reaction of the oligomer produced by the esterification reaction; conducting a solid state polymerization of the polymer produced by the polycondensation; and melt spinning and drawing the polyester chip produced by the solid state polymerization, fiber for an airbag produced thereby, and fabric for an airbag comprising the same. The polyester fiber prepared according to the present invention has low modulus, high strength, and high contraction.

Abstract: Disclosed are a preparation method for drawn fibers that enables the preparation of drawn poly(ethyleneterephthalate) fibers exhibiting with high fineness of at least 2,000 denier while having high tenacity and excellent dimensional stability and causes almost no deterioration of tenacity during the manufacturing process of tires such as vulcanization, and a drawn poly(ethyleneterephthalate) fiber and a tire cord that are obtained by the preparation method. The preparation method for drawn poly(ethyleneterephthalate) fiber includes: melt-spinning a polymer comprising at least 90 mol % of poly(ethyleneterephthalate) having a content of terminal carboxyl group (—COOH) in the range of 20 to 30 eq/106 g at a spinning speed of 2,500 to 4,000 m/min to form a undrawn fiber having a fineness of at least 2,000 denier; and drawing the undrawn fiber at a draw ratio of 1.4 to 2.4.

Abstract: The present invention relates to a polyester yarn which can be used in a fabric for an airbag. More particularly, the present invention relates to a polyester yarn for an airbag having a modulus of 60 g/d or less in the elongation range of 2.0-3.0%, a modulus of 45-70 g/d in the elongation range of 9.0-11.0%, and a modulus of 60 g/d or more in the elongation range of 12.0-14%, and a fabric for an airbag including the same. When the polyester yarn is used in the fabric for an airbag, it provides excellent packing property, excellent occupant-protection performance upon collision, and gas barrier effect, and also minimizes the impact applied to the occupant, thereby safely protecting the occupant.

Abstract: The present invention provides cellulose-based fibers including cellulose and at least one polymer selected from the group consisting of a polysiloxane, a polyacrylic acid, a polyacrylamide, an m-aramid, and a polyvinylalcohol/polystyrene copolymer, and a tire cord including the same. Furthermore, the cellulose-based fibers of the present invention have an advantage in superior elongation and tenacity of the prior cellulose fibers by blending at least one polymer having a functional group that is capable of a hydrogen bond with a hydroxyl group of a cellulose molecule.

Abstract: The present invention relates to a drawn poly(ethyleneterephthalate) (PET) fiber exhibiting excellent dimensional stability and uniform properties while having high fineness of 2000 denier or more, a tire cord, and their preparation method. The drawn PET fiber includes PET 90 mol % or more, and has a crystallinity of 40 to 50%, an amorphous orientation factor (AOF) of 0.01 to 0.2, a monofilament fineness of 2.5 to 4.0 denier, a coefficient of variation (CV) of cross sectional area of 8.0% or less, and a total fineness of 2000 to 4000 denier.

Abstract: Disclosed is a polyester yarn which can be used in a fabric for an airbag. A content of one or more inorganic fillers selected from the group consisting of TiO2, SiO2, and BaSO4 is 200 ppm or less, a breaking elongation is 15% or more, a dry shirinkage rate is 3% or more, and the sum of the breaking elongation and the dry shirinkage rate is 20% or more, a production method thereof, and a fabric for an airbag produced therefrom. The polyester yarn has remarkably reduced stiffness and excellent mechanical properties of high strength, high elongation, and high shirinkage.

Abstract: Disclosed is a polyester yarn that can be used in a fabric for an airbag. In particular, a polyester yarn having a diethylene glycol content of 1.1 to 2.5 wt % and initial modulus of 100 g/d or less, a production method thereof, and a fabric for an airbag produced therefrom are disclosed. The polyester yarn has excellent moisture and heat resistance and light resistance, and maintained excellent mechanical properties after long-term aging under high temperature and high humidity conditions. Therefore, when applied to a fabric for an airbag, the polyester yarn provides excellent packing property, shape stability, and gas barrier effect, and the impact applied to a passenger is minimized, thereby safely protecting the passenger at the same time.

Abstract: Disclosed is a high strength and high elongation polyester fiber being used for anchoring, mooring, or towing a ship, and particularly is a polyester fiber wherein the recovered work ratio at the elongation corresponding to 10% of the maximum load measured at room temperature is 70% or more, the recovered work ratio at the elongation corresponding to 20% of the maximum load is 50% or more, and the recovered work ratio at the elongation corresponding to 30% of the maximum load is 40% or more, a method of preparing the same, and a polyester fiber rope including the same.

Abstract: This disclosure relates to a film for a tire inner liner including: a base film including a copolymer or mixture of a polyamide-based resin and a polyether-based resin; and an adhesive layer including a resorcinol-formalin-latex (RFL)-based adhesive, and a method for manufacturing the same.

Abstract: This disclosure relates to high strength polyester fiber for industrial application such as a seat belt, webbing and the like, particularly to polyester fiber having elongation of 0.4% or more at stress of 1.0 g/d, elongation of 3.5% or more at stress of 4.0 g/d, and elongation of 6.0% or more at stress of 7.0 g/d, as measured at room temperature, and a method for manufacturing the same. The polyester fiber according to the present invention has high strength, low modulus and high elongation thereby securing excellent mechanical properties, and thus, a seat belt having excellent impact absorption rate, and remarkably improved abrasion resistance and heat resistant breaking strength retention may be manufactured.

Abstract: This invention relates to a film for a tire inner liner, which includes a copolymer including a polyamide-based segment and 5˜50 wt % of a polyether-based segment relative to the total weight of the film, and has a thickness 30˜300 ?m, and to a method of manufacturing the film for a tire inner liner, including polymerizing a polyamide-based resin or its precursor with 5˜50 wt % of a polyether-based resin relative to the total weight of the film, thus preparing a copolymer, and melting and extruding the copolymer, thus forming a film.

Abstract: Disclosed are a cellulose-based filament for a tire cord, a bundle including the same, a twisted yarn including the same, and a tire cord including the same. The cellulose-based filament is suitable for use in a tire cord has advantages in that strength deterioration due to twisting is remarkably low and elongation is improved, and thus the fatigue resistance is good.

Abstract: The present invention relates to a marine polyester yarn used in the anchoring of an oil prospecting ship for oil field development in the deep sea, in particular, a marine polyester yarn prepared by surface-treatment of a polyester fiber with an oil component, which has a work recovery or creep rate within the predetermined range in a cycling test according to the ASTM D885 method of the American Society for Testing and Materials, and a preparation method thereof. The marine polyester yarn of the present invention is a lightweight fiber rope, compared to the known wire ropes, and thus can be conveniently used. Simultaneously, it is excellent in terms of mechanical strength, abrasion resistance, and shape stability, thereby being used as a marine yarn for a long time.

Abstract: The present invention relates to a novel polymer, an adhesive composition including the same, and a rubber reinforcing material treated with the same, and more particularly to an organic polysiloxane including a certain repeating unit, an adhesive composition including the same, and a rubber reinforcing material treated with the same. Because the organic polysiloxane and the adhesive composition including the same is superior in reactivity to a hydroxyl group, an amide group, or an amine group, and has high thermal resistance and low stiffness, the composition is preferably used for surface-treating a rubber reinforcing material such as a tire cord and make it possible to provide a rubber reinforcing material such as a tire cord having good properties.

Abstract: Disclosed is a polyester fiber that can be applied to a fabric for an airbag, and particularly, to a polyester fiber having a crystallinity of 43% to 55%, an amorphous orientation factor (AOF) of 0.2 to 0.8, and a long period of 140 to 180 ?, a method of preparing the same, and a fabric for an airbag prepared therefrom. The polyester fiber of the present invention remarkably secures high strength and high elongation, and it is possible to provide superior packing properties, dimensional stability, and gas barrier effect, and to protect occupants safely by minimizing the impact applied to the occupants, when it is used for the fabric for an airbag.