PRESSURE-SENSITIVE ADHESIVE TAPE SUITABLE FOR APPLICATION TO WATER-REPELLENT SURFACE

摘要

The present invention provides a pressure-sensitive adhesive tape which even when applied by instantaneous striking or a like action, exhibits sufficient adhesiveness to a water-repellent surface having a pure-water contact angle of 140º or more and which suffers from little adhesion of the pressure-sensitive adhesive to a cutting tool during fabrication such as cutting or punching. A pressure-sensitive adhesive tape which is useful for a packaging material that has a water-repellent surface having a pure-water contact angle of 140º or more and which is to be applied to the water-repellent surface, characterized in that: (1) the pressure-sensitive adhesive tape has both a substrate layer made of a foamed body and a natural rubber-based pressure-sensitive adhesive layer; (2) the substrate layer has a density of 0.38g/cm3 or less and a thickness of 1mm or less; and (3) the natural rubber-based pressure-sensitive adhesive layer exhibits (i) a basis weight of 35 to 65g/m2, (ii) a ball number of 10 or more in a ball tack test stipulated in JIS Z0237, and (iii) a holding power of 100sec or more in a holding power test stipulated in JIS Z0237.