| abstract |
Provided are a tape substrate having excellent oil resistance as well as balanced properties of flexibility, a hand cutting property and heat resistance, and an adhesive tape using the tape substrate. n The tape substrate contains an ethylene-aromatic vinyl compound copolymer with an isotactic stereoregularity. Furthermore, the ethylene-aromatic vinyl compound copolymer is one having an alternating structure of ethylene and the aromatic vinyl compound represented by the formula (1) below, and an isotactic diad index m of Ph (an aromatic group) in the structure of the copolymer being more than 0.75: n n n n n n n n n n where Ph is an aromatic group and xa is the number of repeating units and an integer of at least 2. |