Nitto-denko Corporation

Ikkou Hanaki

Keiji Hayashi

Kazuhito Okumura

Kiichiro Matsushita

Shou Uchida

Ryohei Sawazaki

Izumi Shimizu

Takatoshi Kawamoto

Jiro Yamato

Kouhei Takeda

A double-sided pressure-sensitive adhesive tape includes a support base member having a hand tearable property, a first acrylic adhesive layer on one surface of the support base member, and a second acrylic adhesive layer on another surface of the support base member. The first acrylic adhesive layer has a thickness t1 that is 5 &#x3bc;m or more and 50 &#x3bc;m or less, the second acrylic adhesive layer has a thickness t2 that is greater than the thickness t1 of the first acrylic adhesive layer and is 20 &#x3bc;m or more, the second acrylic adhesive layer has gel fraction X2 that is 20 mass % or more and 75 mass % or less, and the second acrylic adhesive layer has adhesive force greater than adhesive force of the first acrylic adhesive layer.

Hand-tearable double-sided pressure-sensitive adhesive tape

The object of the present invention is provision of a surface protection sheet for laser processing to be applied to the surface on the opposite side of the laser beam irradiation face, which can protect the surface of an application object, and does not allow easy development of a dross during laser cutting processing. According to the present invention, a surface protection sheetfor laser processing to be applied to the surface on the opposite side of the laser beam irradiation faceof a workpieceduring a cutting process by irradiation of a laser beamon the workpieceis provided, which contains a substrate layer and an adhesive layer formed on one surface of the substrate layer, wherein the substrate layer is made of a resin material having a melt viscosity measured based on JIS K7199 (1999) at 290&#xb0; C. of not more than 200 Pa&#xb7;s, and has a thickness of 0.01-0.12 mm.

Surface protection sheet for laser material processing

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Osaka, Japan

Ikkou Hanaki