Abstract: The present invention relates to a browning-inhibiting composition containing a compound represented by the following formula (1): wherein R21, R22, R23, R24, R26 and R27 each independently represent a hydrogen atom or a substituent, and at least one of R21 or R23 is a hydrogen atom; when R23 represents a hydrogen atom, at least one of R22 or R24 represents a substituent; R25 represents a hydrogen atom, an oxygen atom, or a substituent; R22 and R23, or R23 and R24 may be bonded together to form a ring with an oxygen atom and a carbon atom to which these Rs are bonded; R25 and R26, or R26 and R27 may be bonded together to form a ring structure with carbon atoms to which these Rs are bonded; X represents an oxygen atom or —CH2—; and a dashed line may represent a double bond.

Abstract: A sealing device includes a seal member and a slinger. The slinger has a slinger fixing part, a first radial part, a first axial part, a second radial part, and a second axial part facing a seal fixing part of the seal member in a radial direction across a first clearance. The seal member has a large-diameter part facing, in an axial direction, an end of the second axial part on the other side in an axial direction across a second clearance. An outer circumferential surface of the large-diameter part and an outer circumferential surface of the second axial part are included in a flow passage surface of a continuous outside flow passage that extends in a straight line along the axial direction. The first clearance and the second clearance communicate with each other, and the sealing device has a labyrinth clearance including the first clearance and the second clearance.

Abstract: A sealing device includes a seal member and a slinger. A labyrinth clearance is provided in a part of a clearance between the seal member and the slinger. The labyrinth clearance includes an outer clearance that opens toward the outside, a central clearance which is continuous with the outer clearance and of which a flow passage direction intersects with that of the outer clearance, and an inner clearance which is continuous with the central clearance and of which a flow passage direction intersects with that of the central clearance. An opening of the outer clearance has a dimension of 0.3 mm or larger and 0.7 mm or smaller. The central clearance has a length of 3 mm or longer in the flow passage direction. The inner clearance has a clearance dimension of 0.3 mm or larger and 1.0 mm or smaller.

Abstract: A sealing device includes a seal member and a slinger. The slinger has a slinger fixing part, a first radial part, a first axial part, a second radial part, and a second axial part facing a seal fixing part of the seal member in a radial direction across a first clearance. The seal member has a large-diameter part facing, in an axial direction, an end of the second axial part on the other side in an axial direction across a second clearance. An outer circumferential surface of the large-diameter part and an outer circumferential surface of the second axial part are included in a flow passage surface of a continuous outside flow passage that extends in a straight line along the axial direction. The first clearance and the second clearance communicate with each other, and the sealing device has a labyrinth clearance including the first clearance and the second clearance.

Abstract: The present invention relates to a browning-inhibiting composition containing a compound represented by the following formula (1): wherein R21, R22, R23, R24, R26 and R27 each independently represent a hydrogen atom or a substituent, and at least one of R21 or R23 is a hydrogen atom; when R23 represents a hydrogen atom, at least one of R22 or R24 represents a substituent; R25 represents a hydrogen atom, an oxygen atom, or a substituent; R22 and R23, or R23 and R24 may be bonded together to form a ring with an oxygen atom and a carbon atom to which these Rs are bonded; R25 and R26, or R26 and R27 may be bonded together to form a ring structure with carbon atoms to which these Rs are bonded; X represents an oxygen atom or —CH2—; and a dashed line may represent a double bond.

Abstract: According to the present invention, there are provided a polyester ultrafine fiber excellent in durability and having an antistatic property, and a method for producing the same. Further, there are provided an antistatic polyester ultrafine fiber capable of being imparted with various functions such as ultraviolet blocking effect, cation dyeability, flame retardancy, spun-like bulkiness, soft touch and resilience of the surface, reboundability, dryness, naturalness, and spunize appearance, wool-like touch feel, wrinkle recoverability, and water absorbing/quick drying property, by introduction of a third component into the antistatic polyester ultrafine fiber, combination with other fibers, change in cross sectional shape, and the like, and a method for producing the same.

Abstract: A conjugate fiber-containing yarn containing side-by-side or eccentric core-in-sheath conjugate fibers each composed of a polyester component and a polyamide component, that can be crimped by heating, and that has properties of increasing its crimp ratio when it absorbs moisture or water and is excellent in windbreaking and warmth-retaining properties, has a wool-like soft and bulky hand, and is capable of forming a fabric in which a see-through property is not increased even when wetted with water.

Abstract: The polyester false-twist textured yarn of the present invention has a sheath part encapsulating an antistatic component, and is not susceptive to deformation of the false-twist, therefore a little fluff in false-twist texturing occurs. Thus, a polyester textile that is excellent also in antistatic performance, while maintaining such performances as soft feeling, warmth-retaining property, water-absorbing property, hygroscopic property that belong to an ultrafine polyester false-twist textured yarn. Further, since it is excellent in heat-resisting properties as compared with conventional polyetheramide-based antistatic agent, the yarn is excellent in wash durability when it is high-pressure dyed and can be suitably used for a textile for use in such applications as school uniform, uniform and dustproof wear for which static charge should be prevented.

Abstract: An unstretched filament composed of a PET-based aromatic polyester multifilament comprising a polyoxyalkylene-based polyether and an organic ionic compound is subjected to simultaneous stretching and false twisting under specified conditions to produce a polyester false twisted yarn, whereby rapid and stable false twisting can be accomplished without section deformation or fluff generation during false twisting, and the resulting yarn has a highly satisfactory hand quality and a fibrillation resistant fiber structure, while also exhibiting a highly durable antistatic property. Interlacing of the unstretched filament with an unstretched polyester filament comprising a polymethyl methacrylate-based polymer and/or polystyrene-based polymer and stretching/false twisting thereof under specified conditions allows rapid and stable production of conjugated false twisted yarn exhibiting highly satisfactory bulkiness and a spun feel with the absence of fluff, as well as a highly durable antistatic property.

Abstract: A conjugate fiber-containing yarn containing side-by-side or eccentric core-in-sheath conjugate fibers each composed of a polyester component and a polyamide component, that can be crimped by heating, and that has properties of increasing its crimp ratio when it absorbs moisture or water and is excellent in windbreaking and warmth-retaining properties, has a wool-like soft and bulky hand, and is capable of forming a fabric in which a see-through property is not increased even when wetted with water.

Abstract: Polyester fibers having a deformed section are produced from a polyester polymer which is obtained by polycondensing an aromatic dicarboxylate ester in the presence of a catalyst containing a mixture of a Ti component (A) comprising at least one a titanium alkoxide or a reaction product thereof with a specific carboxylic acid or its anhydride with a P compound component (B) represented by the following general formula (III) and/or a reaction product of a Ti compound component (C) with a P compound component (D) represented by the following general formula (IV). The obtained fibers have a favorable color tone and excellent qualities without showing fluffing.