Nipro Patch Co., Ltd.

Junko Tsuchiya

Naohisa Kawamura

Takashi Saitoh

Disclosed is an adhesive skin patch having an SIS block copolymer as an adhesive component, which has an improved handling property and can reduce irritation to a user. The adhesive skin patch comprises a flexible substrate and an adhesive layer laminated on the substrate, wherein the adhesive layer comprises a styrene-isoprene-styrene block copolymer. In the adhesive skin patch, the tan &#x3b4; value of the adhesive agent as determined by measuring a dynamic viscoelasticity at 32&#xb0; C. satisfies a requirement represented by the following formula 1 at at least one frequency laying between 0.04 to 0.25 Hz. 0.25x+0.05&#x2266;y&#x2266;0.25x+0.10 (formula 1) [wherein x represents a frequency (Hz); and y represents a tan &#x3b4; value.]

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Kasukabe, Japan

Junko Tsuchiya