Abstract: A polyester monofilament package is formed by reeling a polyester monofilament comprising polyethylene terephthalate and satisfies all of the following requirements (a) to (d): (a) the coefficient of dynamic friction between yarns of the polyester monofilament being 0.13 ?d or less; (b) the package end being in a tapered shape with a taper angle (0) of 75° or less; (c) the variation gradient in unreeling tension (AT) being 0.02 cN/dtex-m or less; and (d) in a part of a reeling thickness of 1 mm in the inner layer of the package, the variation in contraction stress of the polyester monofilament being 3.0 cN/dtex or less.

Abstract: A polyester monofilament package is formed by reeling a polyester monofilament comprising polyethylene terephthalate and satisfies all of the following requirements (a) to (d): (a) the coefficient of dynamic friction between yarns of the polyester monofilament being 0.13 ?d or less; (b) the package end being in a tapered shape with a taper angle (0) of 75° or less; (c) the variation gradient in unreeling tension (AT) being 0.02 cN/dtex-m or less; and (d) in a part of a reeling thickness of 1 mm in the inner layer of the package, the variation in contraction stress of the polyester monofilament being 3.0 cN/dtex or less.

Abstract: There is provided a core-sheath bicomponent polyester monofilament, wherein a core component is composed of polyethylene terephthalate (PET) and a sheath component composed of PET having an intrinsic viscosity (IV) at least 0.2 lower than that of the core component, the polyester monofilament having a fineness of 3 to 8 dtex, a strength of 7.5 cN/dtex or more, a toughness (strength×elongation0.5) of 29 or more, and a longitudinal yarn fineness variation of 1.5% or less.

Abstract: A refrigerating unit having at least one refrigerating machine oil using polyol ester system oil as its base oil in at least one refrigeration cycle using at least one hydrofluorocarbon system refrigerant as a refrigerant, the present invention sets the purity of hydrofluorocarbon system refrigerant to the level higher than 99.95 wt % and the mixing of chlorine system refrigerant to the level lower than 80 ppm. In addition, the performance and reliability of refrigerating unit using the hydrofluorocarbon system refrigerant such as R134a can be enhanced by making the said polyol ester system oil to be the chemical compound of particular physical properties, by suppressing the equilibrium water content of refrigeration cycle and by limiting the residual chlorine volume.

Abstract: A lubricant for a refrigerating unit uses a hydrofluorocarbon system refrigerant with a polyol ester system oil as its base oil. The purity of hydrofluorocarbon system refrigerant is set to a level higher than 99.95 wt % and the mixing of chlorine impurity in the system refrigerant is set at a level lower than 80 ppm. The performance and reliability of a refrigerating unit using the hydrofluorocarbon system refrigerant, such as R134a, can be enhanced by making the polyol ester system oil of a chemical compound having particular physical properties, by suppressing the equilibrium water content of refrigeration cycle and by limiting the residual volume.

Abstract: An image processing method and apparatus wherein document information is separated by using an optical device into two colors that are complementary to each other, converted photo-electrically and processed by using a photo-electric conversion device, and extracted on the basis of the result of processing by using a color extraction information generation device, and a color information designated by the color extraction information of the color extraction information generation device is stored in a color information storage device.

Abstract: A fragrant sheath-core composite fiber suitable for bedding and having a cross-section including a sheath and a core including a hollow portion, wherein an aromatic perfume having a boiling point higher than 150.degree. C. under normal pressure is incorporated and dipersed in an amount 0.1 to 10.0% by weight in a thermoplastic polymer constituting the core. The core component is preferably a polyethylene type polymer, and the sheath component is preferably a polyethylene terephthalate polymer. One of typical compositions of the aromatic perfume is an essential oil mixture including (1) 10 to 20% of lemon oil, (2) 5 to 15% of bergamot oil, (3) 2 to 8% of lavender oil, (4) 2 to 8% of lemongrass oil, (5) 2 to 8% of cedarwood oil and (6) 0.5 to 1.5% of jasmine absolute.