摘要:
This invention provides a method for forming multilayer coating film excelling in smoothness and distinctness of image, by 3-coat-1-bake system in which a step of applying onto a coating object a water-based intermediate paint (X) to form an intermediate coating film; a step of adjusting the solid content of the intermediate coating film to 70-100 mass %; a step of applying onto the intermediate coating film a water-based base coating paint (Y) containing 30-55 mass parts of alcoholic solvent having a boiling point of 170-250° C., to form a base coating film; a step of adjusting the solid content of the base coating film to 70-100 mass %; a step of applying a clear paint (Z) comprising 40-60 mass parts of carboxyl-containing compound and 60-40 mass parts of polyepoxide onto the base coating film to form a clear coating film; and heating the intermediate coating film, base coating film and clear coating film at 100-120° C. for 3-10 minutes and thereafter further heating them at 130-160° C. for 10-30 minutes; are successively carried out.
摘要:
This invention provides a method for forming multilayer coating film excelling in smoothness and distinctness of image, by 3-coat-1-bake system in which a step of applying onto a coating object a water-based intermediate paint (X) to form an intermediate coating film; a step of adjusting the solid content of the intermediate coating film to 70-100 mass %; a step of applying onto the intermediate coating film a water-based base coating paint (Y) containing 30-55 mass parts of alcoholic solvent having a boiling point of 170-250° C., to form a base coating film; a step of adjusting the solid content of the base coating film to 70-100 mass %; a step of applying a clear paint (Z) comprising 40-60 mass parts of carboxyl-containing compound and 60-40 mass parts of polyepoxide onto the base coating film to form a clear coating film; and heating the intermediate coating film, base coating film and clear coating film at 100-120° C. for 3-10 minutes and thereafter further heating them at 130-160° C. for 10-30 minutes; are successively carried out.
摘要:
This invention provides an automobile water-based paint capable of forming coating film of little metallic mottling and excellent flip-flop property and smoothness, which comprises hydroxyl-containing resin, viscosity-regulating agent and hydrophobic solvent, the viscosity-regulating agent being a copolymer obtained by copolymerizing a monomeric mixture containing a (meth)acrylic acid (salt), monomer represented by the following formula (1) [in which R1 stands for hydrogen or methyl, R2 and R3 stand for hydrogen, methyl or ethyl, R4 stands for C8-24 hydrocarbon group, and n is an integer of 3-60], alkyl (meth)acrylate of which alkyl moiety has 1-4 carbons and a monomer having at least two polymerizable unsaturated groups per molecule, at specific ratios.
摘要:
A wiring pattern inspecting method comprises irradiating a test object provided with wiring patterns formed in a plurality of layers with x-rays, obtaining a variable-density image signal corresponding to the thickness of the wiring patterns superposed in a plurality of layers including superposed sections of the wiring patterns, extracting a plurality of image signals, the number of which corresponding to that of the superposed wiring patterns, from the variable-density image signal, and comparing end point information or isolated point information about the wiring patterns obtained from image signal representing a larger number of superposed wiring patterns, and branch information about the end points or the isolated points on the wiring points, obtained from the extracted image signal representing a smaller number of superposed wiring patterns to inspect the wiring patterns for defects in the wiring patterns. The wiring pattern inspecting method is carried out by a wiring pattern inspecting system.
摘要:
In order to join a first plate element such as a rear quarter panel of an automobile and a second plate element such as a roof panel together, an edge portion of the first plate element is provided with a joggled portion. The joggled portion is formed integrally with a general portion of the first plate element by way of a shoulder. The joggled portion includes an offset reinforcing portion having a band-shaped recess along the shoulder. A major portion lying closer to the terminal edge of the joggled portion than the reinforcing portion includes a joining surface to which an edge portion of the second plate element is joined in a face-to-face contact in such a manner that a gap is defined between an terminal edge of the edge portion and the shoulder. A welding material is built up into the recess of the reinforcing portion through the gap to thereby join the first and second plate elements together. The welding material within the recess reaches the back side of the second plate element so that the welding area is increased by the welding material and that the rigidity and strength of the joined structure is increased due to the cooperation of the reinforcing portion and the welding material. The structure prevents a local heating, suppresses thermal strains and concave thermal deformation of the two plate elements after cooling, and hence omits the hammering after the welding.
摘要:
This invention provides an automobile water-based paint capable of forming coating film of little metallic mottling and excellent flip-flop property and smoothness, which comprises hydroxyl-containing resin, viscosity-regulating agent and hydrophobic solvent, the viscosity-regulating agent being a copolymer obtained by copolymerizing a monomeric mixture containing a (meth)acrylic acid (salt), monomer represented by the following formula (1) [in which R1 stands for hydrogen or methyl, R2 and R3 stand for hydrogen, methyl or ethyl, R4 stands for C8-24 hydrocarbon group, and n is an integer of 3-60], alkyl (meth)acrylate of which alkyl moiety has 1-4 carbons and a monomer having at least two polymerizable unsaturated groups per molecule, at specific ratios.
摘要:
An inspection system is disclosed, which inspects a wiring pattern on a high multilayer printed wiring board while determining a calibration position with a smaller number of error reports, and predicts the verification work time by evaluating the inspection property. Based on the CAD data of each layer of the printed wiring board to be inspected and the layer structure information, an intensity composition map viewed through the inspection surface is generated. A plurality of sets of the intensity components of the inspection surface are determined, and after determining at least one intensity evaluation region covering all the sets, the intensity evaluation region is imaged by an inspection unit and the statistical intensity value corresponding to each intensity component is determined and substituted into the intensity composition map. The inspection is conducted by determining the optimal calibration position for determining an inspection threshold value in this way.
摘要:
An X-ray inspection apparatus and method in which an object to be inspected is irradiated with characteristic X-rays containing at least one wavelength which affords a high X-ray absorbance in the object to be inspected. A transmitted X-ray image which has passed through the object to be inspected is detected, and the object to be inspected is inspected on the basis of the transmitted X-ray image. The method and apparatus are utilized to fabricate a multi-layer printed circuit board.