Mitsubishi Denki K.k.

Ishihara Sangyo Kaisha, Ltd.

Satoshi Nagamori

Masanori Tomonari

Yasuhiko Iwai

Eikichi Hayashi

Yuto Kameda

Provided are a titanium dioxide aqueous dispersion having high dispersibility and little aggregation or coarse particles, and a method for producing the same. The titanium dioxide aqueous dispersion contains titanium dioxide particles having a hydrophobic compound such as a higher fatty acid or a salt thereof on the surface, an aqueous dispersion medium, a nonionic surfactant having an HLB value of 10 or higher, and a basic compound such as an alkanolamine, and the pH is in the 8.5-13 range. The method for producing a titanium dioxide aqueous dispersion has a step for mixing the titanium dioxide particles having a hydrophobic compound on the surface, the aqueous dispersion medium, the nonionic surfactant having an HLB value of 10 or higher, and the basic compound to bring the pH of the aqueous dispersion into the 8.5-13 range.

Titanium dioxide aqueous dispersion and method for producing same

A laser cutting machine in which a laser beam is condensed by a machining lens, and while the laser beam thus condensed is being applied to a workpiece, the laser beam and the workpiece are moved relative to each other, to cut the workpiece, the laser cutting machine comprising optical axis moving means for moving the laser beam applied to the machining lens in parallel with an optical axis to a desired position on the machining lens, and optical axis movement control means for controlling the optical axis moving means in conformance with a program provided for a cutting locus to control the relative movement of the condensed laser beam and workpiece, so that the laser cutting machine which is not expensive, and can form a cut in a workpiece in such a manner that the cut is not tapered in section, without lowering the machining accuracy is obtained.

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Osaka, Japan

Satoshi Nagamori