Abstract: Provided is an electrostatic coating method using a conductor such as a metal or a conductive resin as a coating target surface 21, the method including coating the coating target surface 21 with a charged paint by ejecting the charged paint from a spray gun 1 in a state where generation of an electrostatic field between a spray gun 1 and the coating target surface 21 is prevented and generation of free ions is prevented.

Abstract: Provided is an electrostatic coating method using a conductor such as a metal or a conductive resin as a coating target surface 21, the method including coating the coating target surface 21 with a charged paint by ejecting the charged paint from a spray gun 1 in a state where generation of an electrostatic field between a spray gun 1 and the coating target surface 21 is prevented and generation of free ions is prevented.

Abstract: In a first coating step, low electrical conductivity is imparted to a coating surface 21 of a non-electrically conductive coating object 20 and a first paint film is formed by applying a charged first paint to the coating surface 21 with free ions being suppressed. In a second coating step, a second paint film is formed by applying a negatively-charged second paint to a surface of the first paint film with free ions being suppressed, before the first paint film dries.

Abstract: Provided is an electrostatic coating method using a conductor such as a metal or a conductive resin as a coating target surface 21, the method including coating the coating target surface 21 with a charged paint by ejecting the charged paint from a spray gun 1 in a state where generation of an electrostatic field between a spray gun 1 and the coating target surface 21 is prevented and generation of free ions is prevented.

Abstract: A low conductivity is provided to a coating surface 21 of a non-conductive coating target 20, and the coating surface 21 is coated with a charged paint while free ions are suppressed.

Abstract: In a first coating step, low electrical conductivity is imparted to a coating surface 21 of a non-electrically conductive coating object 20 and a first paint film is formed by applying a charged first paint to the coating surface 21 with free ions being suppressed. In a second coating step, a second paint film is formed by applying a negatively-charged second paint to a surface of the first paint film with free ions being suppressed, before the first paint film dries.

Abstract: A joint quality examining device and method for accurately examining in real time the qualities of the joints of all the products where joining members are joined to members to be joined.

Abstract: A low conductivity is provided to a coating surface 21 of a non-conductive coating target 20, and the coating surface 21 is coated with a charged paint while free ions are suppressed.

Abstract: A joint quality examining device and method for accurately examining in real time the qualities of the joints of all the products where joining members are joined to members to be joined.

Abstract: Gas treatment equipment including a corona electrode and a dust-collection electrode facing the corona electrode, and forming corona discharge in gas passing between the corona electrode and the dust-collection electrode by applying a high voltage between them to collect components in the gas wherein a gas turbulence accelerator is located in the vicinity of the surface of the dust-collection electrode facing the corona electrode.

Abstract: In order to remove by burning captured PM by using microscopic luminescent discharge that repeats generation and extinction randomly in time and space on the surface of an insulating filter with a minimum power consumption and to enhance the capturing efficiency and combustion-removal efficiency of PM in exhaust gas from diesel engines or the like, at least one electrode pair (13) are arranged on or in the vicinity of the surface of an insulating capturing member (12) for capturing particulate matter (41) in exhaust gas, a predetermined voltage (Vs) is applied between the electrode pair (12) to generate a microscopic luminescent discharge (42) that repeats generation and extinction randomly in time and space on the surface of the insulating capturing member (12), and the microscopic luminescent discharge (42) generated by the application of this predetermined voltage (Vs) is used to remove by burning the particulate matter (41) captured on the insulating capturing member (12).

Abstract: A gas treatment device (1), comprising a charging agglomeration part (10) which charges and agglomerates components targeted for collection in gas by utilizing corona discharge, and a filter part (20) which collects the agglomerated components. The charging agglomeration part (10) is disposed on the upstream side, and the filter part (20) is disposed on the downstream side. By this configuration, using the agglomerating functions and precipitating functions of corona discharge and the precipitating functions of filters, ultra-fine particulates can be agglomerated and enlarged. Moreover, the present invention is a gas treatment device that has high performance and low pressure-loss and that is capable of being configured in a compact form factor such that it can also be used as an exhaust gas purification device mounted onboard an automobile.

Abstract: Gas treatment equipment (1) comprising a corona electrode (10) and a dust-collection electrode (20) facing the corona electrode (10), and forming corona discharge in gas (G) passing between the corona electrode (10) and the dust-collection electrode (20) by applying a high voltage between them to thereby agglomerate or collect components in the gas (G), wherein a means (23) for accelerating turbulence of the gas (G) in the vicinity of the surface (200 of the dust-collection electrode (20) facing the corona electrode (10) is provided on the opposing surface (20f) or in the vicinity thereof.

Abstract: A composite paint for an automotive outer panel comprises an electrodeposition paint film coated on the surface of a steel sheet. The electrodeposition paint film has a minimum melt viscosity not less than 0.2 during hardening and consists essentially of a water paint composition in an amount ranging from 50 to 85 parts by weight upon conversion to a solid content, and a partially cross-linked resin in an amount ranging from 15 to 50 parts by weight upon conversion to a solid content. Additionally, an intermediate paint film is coated on the electrodeposition paint film and has a hardening starting time ranging from 15 to 20 minutes.

Abstract: A composite paint film coating formed on a steel sheet of an automotive vehicle body. The composite paint film coating is comprised of an electrodeposition paint film (I) coated on the steel sheet, and an intermediate paint film (II) coated on the first paint film. The electrodeposition paint film has a minimum melt viscosity not less than 0.2 during hardening. The electrodepositon paint film is formed of cathodic electrodeposition paint composition which includes a cationic thermosetting resin (1), and an already cross-linked particulate resin (2). The particlate resin is an addition-polymer formed between a fist compound (A) having at least two primary amino groups in a molecule, and a second compound (B) having at least two .alpha.,.beta.-ethylenic unsaturated groups. The particulate resin has an average particle size ranging from 0.01 to 1 .mu.m. The weight ratio ((2)/(1)) in solid content between the particulate resin (2) cationic thermosetting resin (1) is within a range from 0.03 to 0.15.

Abstract: A composite paint film formed on a steel sheet of an automotive vehicle body. The composite paint film comprises an electrodeposition paint film (I) coated on the steel sheet, and an intermediate coat paint film (II) coated on the first paint film. The electrodeposition paint film is formed of an epoxy-based cationic electrodeposition paint composition and has a minimum melt viscosity not less than 0.2 during hardening. The epoxy-based cationic electrodeposition paint composition includes an amine-added epoxy resin (1) of the type which may be hardened with a blocked isocyanate, a colloidal silica-containing gelled particulate (2), and an alkyltin ester compound of a liquid aliphatic carboxylic acid. The above-mentioned colloidal silica-containing gelled particulate is formed by dispersing a mixture of an acrylic copolymer having a hydrolizable alkoxysilane group and a cationic group and a cationic acidic colloidal silica in water to carry out a cross-linking reaction in particles of the colloidal silica.