Abstract: Disclosed is a first agent-containing composition for treating synthetic fiber that is combined in use with a second agent for treating synthetic fiber containing a specific nonionic surfactant. The first agent-containing composition contains a first agent for treating synthetic fiber and a solvent. The first agent contains specific organic phosphoric acid ester salts at specific ratios and has a specific acid value. The solvent has a boiling point at atmospheric pressure of not more than 105° C. Assuming that the sum of the amounts of the first agent and the solvent contained in the first agent-containing composition is 100 parts by mass, the amount of the first agent contained in the first agent-containing composition is not less than 35 parts by mass and not more than 55 parts by mass.

Abstract: An elastic fiber treatment agent that contains, as a smoothing agent, a mineral oil with a content ratio of an aromatic component of less than 1% by mass and an aniline point of 70° C. to 110° C. The mineral oil has a mass ratio between the content of a naphthene component and the content of a paraffin component of such that naphthene component/paraffin component=30 to 50/70 to 50.

Abstract: An inorganic fiber sizing agent that contains at least one carbon nanostructure selected from the group consisting of carbon nanotubes and carbon nanofibers, a resin, and a surfactant. If the total content of a nonvolatile content of the resin and the surfactant is taken as 100 parts by mass, the inorganic fiber sizing agent contains the surfactant at a ratio of 2 to 50 parts by mass.

Abstract: Disclosed is a synthetic fiber treatment agent containing a phenol amine compound and a nonionic surfactant. The phenol amine compound is at least one selected from the group consisting of a compound formed from a phenol derivative, formaldehyde, and a polyamine compound and a compound obtained by reacting a boron-containing compound with a compound formed from a phenol derivative, formaldehyde, and a polyamine compound. The phenol derivative is a phenol in which a hydrocarbon group with a number average molecular weight of not less than 100 and not more than 2000 is modified.

Abstract: The present invention addresses the problem of improving friction characteristics, when wet, of fibers to which a treatment agent for short fibers is adhered, and improving the heat resistance of the treatment agent for short fibers. This treatment agent for short fibers does not substantially include a phosphate compound, but does contain the fatty acid (A) below and a non-ionic surfactant. The fatty acid (A) is at least one fatty acid selected from C1-6 fatty acids, C1-6 hydroxy fatty acids, and salts of the aforementioned fatty acids.

Abstract: The present invention addresses the problem of improving friction characteristics, when wet, of fibers to which a treatment agent for fibers is adhered. The treatment agent for fibers contains the fatty acid (A) below, an organic phosphate compound (B), and a (poly)oxyalkylene derivative (C). The fatty acid (A) is at least one fatty acid selected from C1-6 fatty acids, C1-6 hydroxy fatty acids, and salts of the aforementioned fatty acids.

Abstract: Disclosed is a synthetic fiber treatment agent containing an amine derivative and a smoothing agent. The amine derivative is a compound in which an alkylene oxide with not less than 2 and not more than 4 carbon atoms is added at a ratio of not less than 1 mole and not more than 30 moles in total to 1 mole of the total of a first amine compound having a hydrocarbon group with not less than 8 and not more than 20 carbon atoms and a second amine compound having a hydrocarbon group with not less than 8 and not more than 20 carbon atoms that differs in the number of carbon atoms from the hydrocarbon group of the first amine compound.

Abstract: Disclosed is a carbon fiber precursor treatment agent that contains a specific (poly)oxyalkylene derivative and a smoothing agent. The smoothing agent contains at least one selected from the group consisting of an amino-modified silicone, a polyether-modified silicone, a dimethyl silicone, and an ester compound. Assuming that the sum of the content ratios of the (poly)oxyalkylene derivative and the smoothing agent in the carbon fiber precursor treatment agent is 100% by mass, the carbon fiber precursor treatment agent contains the (poly)oxyalkylene derivative at a ratio of 5% by mass or more and 80% by mass or less and the smoothing agent at a ratio of 20% by mass or more and 95% by mass or less.

Abstract: An object of the present invention is to provide a sewing thread treatment agent, and a sewing thread, each achieving low friction properties across a wide range of sewing speeds. As a solution, a sewing thread treatment agent is provided, which is characterized in that it contains a hydroxy-terminated polydimethylsiloxane (A), a nonionic surfactant (B), and at least one type of wax (C) selected from paraffin wax, oxidized paraffin wax, polyethylene wax, oxidized polyethylene wax, and carnauba wax.

Abstract: Disclosed is an elastic fiber treatment agent that contains at least one smoothing agent selected from the group consisting of mineral oils, silicone oils, and ester oils and at least one naturally derived ingredient selected from the group consisting of terpene resins and terpene resin derivatives. Also disclosed is an elastic fiber treatment agent that contains at least one smoothing agent selected from the group consisting of mineral oils, silicone oils, and ester oils and at least one naturally derived ingredient selected from the group consisting of rosins and rosin derivatives. In one aspect, the smoothing agent includes a mineral oil and the mineral oil content of the smoothing agent (A) is 59.5% to 95% by mass.

Abstract: A sand mold-forming additive capable of making a sand mold-forming composition having excellent forming property and a sand mold having excellent moisture resistance is provided. The sand mold-forming additive contains 0.01-2.00 parts by weight of an inorganic alkali metal compound (B) per 100 parts by weight of anionic surfactant (A). The inorganic alkali metal compound (B) is at least one selected from sodium chloride and sodium sulfate. The ionic surfactant (A) is preferably at least one selected from alkyl sulfonic acid metal salts (A1), alkyl sulfuric acid metal salts (A2), and polyoxyalkylene alkyl ether sulfuric acid ester metal salts (A3).

Abstract: The present invention addresses the problem of suitably improving a treatment agent for a carbon fiber precursor in terms of the heat resistance and the effect of suppressing fusion between fibers during the step of flame-resisting treatment. This treatment agent for a carbon fiber precursor is characterized by containing a lubricant, the lubricant comprising a specific sulfur-containing diester compound and a specific sulfur-containing monoester compound.

Abstract: An aqueous liquid of a carbon fiber precursor treatment agent contains a carbon fiber precursor treatment agent and water, the carbon fiber precursor treatment agent containing an amino-modified silicone and a particular nonionic surfactant having a molecular weight distribution (Mw/Mn) of from 1.05 to 1.50. The amino-modified silicone may have a kinematic viscosity at 25° C. of 50 to 4,000 mm2/s. The carbon fiber precursor treatment agent is adhered to a carbon fiber precursor.

Abstract: Please replace the Abstract of the Disclosure with the following: An elastic fiber treatment agent that contains a smoothing agent, water and an organic phosphoric acid ester salt. The smoothing agent contains a mineral oil with an aniline point of not more than 110° C., a silicone oil, and optionally an ester oil. Assuming that the sum of the content ratios of the smoothing agent, the water, and the organic phosphoric acid ester salt in the elastic fiber treatment agent is 100 parts by mass, the elastic fiber treatment agent contains the mineral oil at a ratio of 20 to 90 parts by mass and the water at a ratio of 0.01 to 2 parts by mass.

Abstract: The purpose of the present invention is to provide: an elastic fiber treating agent that can improve the morphological characteristics of elastic fibers; and elastic fibers that have the elastic fiber treating agent adhered thereto. This elastic fiber treating agent is characterized by containing: at least one smoothing agent (A) selected from mineral oil, silicone oil, and ester oil; and an unsaturated fatty acid metal salt (B).

Abstract: Disclosed is a synthetic fiber treatment agent that contains a smoothing agent and a nonionic surfactant. The smoothing agent contains a condensed hydroxy fatty acid formed by condensation from a hydroxy fatty acid having a hydroxy group and a carboxy group in the molecule.

Abstract: Provided is a modifier for a polyester-based resin film, containing alkali metal salt of alkylaryl sulfonic acid (A) in which an alkyl group includes 6 to 22 carbons, and an inorganic salt (B), the inorganic salt (B) being at least one selected from sodium sulfate, potassium sulfate, lithium sulfate, sodium chloride, potassium chloride, and lithium chloride.

Abstract: Polyolefin resin modifiers are provided that contain a nonionic surfactant, an organic sulfonate salt, and an inorganic salt. The organic sulfonate salt can be at least one selected from the group consisting of alkylsulfonic acid alkali metal salts whose alkyl group has 6 to 22 carbon atoms, alkylarylsulfonic acid alkali metal salts whose alkyl group has 6 to 22 carbon atoms, and sulfonic aliphatic ester alkali metal salts whose alkyl group has 6 to 22 carbon atoms. The inorganic salt can be at least one selected from the group consisting of sodium sulfate, potassium sulfate, calcium sulfate, lithium sulfate, sodium chloride, potassium chloride, lithium chloride, magnesium chloride, and calcium chloride.

Abstract: Disclosed is an elastic fiber treatment agent that contains a smoothing agent and an alkyl phosphate ester compound. The alkyl phosphate ester compound contains specific phosphate ester Q1 and at least one or more selected from specific phosphate esters Q2 and Q3. In a P nucleus NMR measurement of the alkyl phosphate ester compound upon an alkali over-neutralization pretreatment, a P nucleus NMR integral ratio attributed to the phosphate ester Q1 is 15% to 60% if the sum of P nucleus NMR integral ratios attributed to the phosphate esters Q1 to Q3 and phosphoric acid and its salt is taken as 100%.

Abstract: Disclosed is an elastic fiber treatment agent that contains at least one smoothing agent selected from the group consisting of mineral oils, silicone oils, and ester oils and at least one naturally derived ingredient selected from the group consisting of terpene resins and terpene resin derivatives. Also disclosed is an elastic fiber treatment agent that contains at least one smoothing agent selected from the group consisting of mineral oils, silicone oils, and ester oils and at least one naturally derived ingredient selected from the group consisting of rosins and rosin derivatives. In one aspect, the smoothing agent includes a mineral oil and the mineral oil content of the smoothing agent (A) is 59.5% to 95% by mass.