Abstract: Laser ray transmitting colored polyolefin resin composition containing an anthraquinone salt forming dye below; and method of laser welding wherein welding a portion of contact of a laser ray transmitting material of said resin composition and a laser ray absorbing material by irradiating laser ray so that the laser ray transmitting material transmits the laser ray and the laser ray is absorbed in the laser ray absorbing material with the laser ray transmitting material and the laser ray absorbing material in contact with each other: A, B: —NH— or —O—; R1-R3: hydrogen, amino, hydroxy, halogen; R4-R13: hydrogen, alkyl, nitro, sulfonic group; Kin+: organic ammonium ion; m: 1 or 2; n: 1 or 2; the sulfonic group is —SO3 or SO3M, the number of —SO3 being m, M representing hydrogen or an alkali metal.

Abstract: Disclosed is a laser-transmissible resin composition for laser welding having 100 parts by weight of a thermoplastic resin, and 0.01 to 3 parts by weight of titanium oxide that has a density of at least 4 g/cm3 and an average particle size of 100 to 400 nm; and the resin composition exhibits a whitish hue of white, gray or tint color. Also disclosed is a method for laser welding that includes piling a resin workpiece that is at least partly capable of laser-absorption onto a laser-transmissible resin workpiece that is molded out of the laser-transmissible resin composition, and irradiating a laser beam thereto to weld thermally.

Abstract: The charge control agent comprises aggregate particles including an azo-type iron complex salt represented by the following chemical formula [VI] (in the chemical formula [VI], B+ is (H+)x(Na+) 1?x and x is mole ratio and 0.6 to 0.9, or B+ is (H+)y(Na+)1?y and y is mole ratio and 0 to 0.2) and the aggregate particles have 0.5 to 5.0 microns of an average particle size. A toner for developing an electrostatic image comprises a resin for the toner and the charge control agent. An image formation process of electrophotography comprises a step for developing an electrostatic latent image on an electrostatic latent image frame by a developer including the toner.

Abstract: A laser-transmissible resin composition for laser welding comprises 100 parts by weight of a thermoplastic resin, 0.01 to 3 parts by weight of titanium oxide that has density of at least 4 g/cm3 and an average particle size of 100 to 400 nm; and exhibiting whitish hue of white, gray or tint color. A method for laser welding comprises: piling a resin workpiece 2 being at least partly capable of the laser-absorption onto a laser-transmissible resin workpiece 1 that molded out of the laser-transmissible resin composition, irradiating a laser beam 3 thereto to weld thermally.

Abstract: A laser ray transmitting colored resin composition is formed of polyphenylene sulfide resin and a colorant having an endothermic peak between 200° C. and 300° C. as determined by TG/DTA thermal analysis. The difference TC-TN between the crystallization point TC of the laser ray transmitting colored resin composition and the crystallization point TN of the same composition as the composition except for not containing the aforementioned colorant, is not less than 0° C. as determined by DSC thermal analysis. The laser ray transmitting material is made of the laser ray transmitting colored resin composition, and has one exothermic energy peak and one endothermic energy peak as determined by DSC thermal analysis.

Abstract: A charge control agent of the present invention comprises aggregate particles of an azo-type iron complex salt represented by the following chemical formula [I] in the chemical formula [I], R1—, R2—, R3—, R4—, R5— and R6— are same or different to each other, n is 0.7 to 0.99, the aggregate particles have an average particle size of 1 to 4 microns and an average particle size of a primary particulate crystalline, that is fined the aggregate particles with ultrasonic irradiation, is at most 3 microns. A toner for developing an electrostatic image comprises a resin for the toner and the charge control agent.

Abstract: A charge control agent of the present invention comprises aggregate particles of an azo-type iron complex salt represented by the following chemical formula [I] in the chemical formula [I], R1—, R2—, R3—, R4—, R5— and R6— are same or different to each other, n is 0.7 to 0.99, the aggregate particles have an average particle size of 1 to 4 microns and an average particle size of a primary particulate crystalline, that is fined the aggregate particles with ultrasonic irradiation, is at most 3 microns. A toner for developing an electrostatic image comprises a resin for the toner and the charge control agent.

Abstract: A positive electrified charge control agent comprises a silicon complex compound bonding with covalent of a central silicon atom and oxygen originated from a hydroxyl group, which bonds to an organic group, and bonding with coordination of the central silicon atom and a carbonyl group of equivalent to the oxygen, the silicon complex compound comprises a trivalent to univalent cation and a trivalent to univalent anion having 1 to 3 equivalents of the oxygen and the carbonyl group to the central silicon atom.

Abstract: The charge control agent comprises aggregate particles including an azo-type iron complex salt represented by the following chemical formula [VI] (in the chemical formula [VI], B+ is (H+)x(Na+)1-x and x is mole ratio and 0.6 to 0.9, or B+ is (H+)y(Na+)1-y and y is mole ratio and 0 to 0.2) and the aggregate particles have 0.5 to 5.0 microns of an average particle size. A toner for developing an electrostatic image comprises a resin for the toner and the charge control agent. An image formation process of electrophotography comprises a step for developing an electrostatic latent image on an electrostatic latent image frame by a developer including the toner.

Abstract: A method for laser welding comprises: forming a laser-transmissible resin workpiece 1 exhibiting whitish hue of white, gray or tint color out of a resin composition which includes 100 parts by weight of a thermoplastic resin and 0.1 to 2 parts by weight of white pigment having 2 to 2.8 of reflectance, piling a resin workpiece 2 being at least partly capable of laser-absorption onto the laser-transmissible resin workpiece 1, and then irradiating a laser beam 3 thereto to weld them thermally.

Abstract: Laser ray transmitting colored polyolefin resin composition containing an anthraquinone salt forming dye below; and method of laser welding wherein welding a portion of contact of a laser ray transmitting material of said resin composition and a laser ray absorbing material by irradiating laser ray so that the laser ray transmits the laser ray transmitting material and is absorbed in the laser ray absorbing material with the laser ray transmitting material and the laser ray absorbing material in contact with each other: A, B: —NH— or —O—; R1—R3: hydrogen, amino, hydroxy, halogen; R4—R13: hydrogen, alkyl, nitro, sulfonic group; Kin+: organic ammonium ion; m: 1 or 2; n: 1 or 2; the sulfonic group is —SO3 or SO3M, the number of —SO3 being m, M representing hydrogen or an alkali metal.

Abstract: A charge control agent of the present invention comprises aggregate particles of an azo-type iron complex salt represented by the following chemical formula [1] in the chemical formula [I], R1—, R2—, R3—, R4—, R5— and R6— are same or different to each other, n is 0.7 to 0.99, the aggregate particles have an average particle size of 1 to 4 microns and an average particle size of a primary particulate crystalline, that is fined the aggregate particles with ultrasonic irradiation, is at most 3 microns. A toner for developing an electrostatic image comprises a resin for the toner and the charge control agent.

Abstract: A toner for electrostatic image development comprises components of a charge control agent, a binding resin, and colorant. The charge control agent is an aromatic-oxy-carboxylic acid iron-including compound. The toner has its particle size distribution with: a volume-average particle diameter (D50) ranging from 5 to 13 microns that is determined by a cumulative 50% volume particle diameter from a largest particle diameter, and a degree of particle size dispersion (D25/D75) ranging from 1.20 to 1.50 that is calculated by a cumulative 25% volume particle diameter (D25) and a cumulative 75% volume particle diameter (D75) as same as the above determined D50.

Abstract: An electrophotographic yellow toner comprising binder resins having dispersed therein acetoacetanilide type monoazo pigments in its amorphous phase. The toner is excellent in transparency and spectral reflection characteristics. The toner is prepared by a process comprising a step of subjecting a colorant containing acetoacetanilide monoazo pigments and binder resins to heat treatment at a temperature higher than the softening point of the binder resin by at least 40.degree. C.

Abstract: An insulative magnetic toner disclosed herein comprises a magnetic powder, a negative charge control agent, a binder resin and a compound having phenazine ring amorphous-silicon photoreceptor.The magnetic toner according to the invention is effective for preventing the occurrence of picture image blurring under high humidity when used in an amorphous-silicon photoreceptor.