Ngk Spark Plug Company, Limited

Takashi Koda

Yoshihiko Kohmura

Yusuke Fuji

Wataru Kawagishi

Ryosuke Matsui

A method for producing a resin joined body in which a specific region Lof a welding portion of a second resin member () is provided to form a low-laser-light-transmissible portion, and the low-laser-light-transmissible portion has a laser light transmissibility lower than that of a region of the welding portion other than the specific region L. Welding is carried out so that a portion between points Sand F, serving as a weld overlap portion (), is present in the specific region Lforming the low-laser-light-transmissible portion. Also disclosed is a resin joined body.

Resin joined body and method for manufacturing same

A resin member with a gas permeable member () includes a resin member having at least one gas hole () extending therethrough between a front surface () and a back surface (), and a sheet-like gas permeable member () covering the gas hole. An outer circumferential portion () of the gas permeable member is embedded in the resin member. The resin member further includes first recesses () disposed around the gas hole, depressed from at least one of the front surface and back surfaces, and allowing at least a portion of the gas permeable member to be visible in a front-back direction, and second recesses () disposed externally of an outer peripheral edge () of the gas permeable member and depressed from at least one of the front surface and the back surface and through which the gas permeable member is invisible in the front-back direction.

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Nagoya, Japan

Takashi Koda