Importance

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Abstract

Provided is a pressure-sensitive adhesive tape for a battery outer packaging having the following feature: the shift (adhesive shift) of the tape in its pressure-sensitive adhesive surface and liquid penetration when the tape is subjected to a salt water immersion test are prevented, and hence the tape is useful for the outer packaging of a battery. The pressure-sensitive adhesive tape for a battery outer packaging includes: a base material; and a pressure-sensitive adhesive layer arranged on one surface of the base material, in which: a value calculated from an expression “a loss modulus of elasticity (G″) of the pressure-sensitive adhesive tape for a battery outer packaging at 70° C.×a thickness (mm) of the pressure-sensitive adhesive layer/a thickness (mm) of the pressure-sensitive adhesive tape for a battery outer packaging” is 8×10³ Pa or more; a value calculated from an expression “a storage modulus of elasticity (G′) of the pressure-sensitive adhesive tape for a battery outer packaging at 23° C.×the thickness (mm) of the pressure-sensitive adhesive layer/the thickness (mm) of the pressure-sensitive adhesive tape for a battery outer packaging” is 3×10⁵ Pa or less; and a pressure-sensitive adhesive strength of the pressure-sensitive adhesive tape for a battery outer packaging to a stainless-steel plate at 23° C. is 2 N/10 mm or more.

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First Claim