Pressure-sensitive adhesive tape
AssigneeDIC Corporation
InventorsDaisuke Watanabe, Kota Suetsugu, Akira Yamakami, Yumi Kagiyama
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Abstract
An adhesive tape with high repeelability from the state that a portion of the adhesive tape has already been peeled from an adherend is provided. The adhesive tape includes a substrate layer and an adhesive layer. The substrate layer has a breaking stress in a range of 1 to 90 MPa and an elongation at break in a range of 400% to 3000%. The adhesive tape satisfies the following relational expression (i): [Math. 1] P400/P0≤0.9 (i). P0 denotes an initial cleavage strength N/cm2 of the adhesive tape, and P400 denotes a cleavage strength N/cm2 when the adhesive tape is stretched by 400%.
Claims6
An adhesive tape comprising:
- a substrate layer;
- and
- an adhesive layer,
- wherein:
- the substrate layer has a breaking stress in a range of 1 to 100 MPa and an elongation at break in a range of 400% to 3000%,
- the following relational expression (i) is satisfied:
- [Math. 1]
- P400/P0≤0.9 (i), and
- P0 denotes an initial cleavage strength N/cm2 of the adhesive tape, and P400 denotes a cleavage strength N/cm2 when the adhesive tape is stretched by 400%, and
- the adhesive layer has a storage modulus G′ in a range of 2.0×105 to 1.0×107 Pa at 23° C.
Dependencies are inferred from the claim text.