US 11,053,415 B2
Pressure-sensitive adhesive tape
Lee Lee Chai, Selangor (MY)
Assigned to NITTO DENKO MATERIALS (MALAYSIA) SDN. BHD., Selangor (MY); and NITTO DENKO CORPORATION, Ibaraki (JP)
Filed by NITTO DENKO MATERIALS (MALAYSIA) SDN. BHD., Selangor (MY); and NITTO DENKO CORPORATION, Ibaraki (JP)
Filed on Jan. 23, 2019, as Appl. No. 16/254,953.
Claims priority of application No. PI2018700312 (MY), filed on Jan. 24, 2018; and application No. PI2019000146 (MY), filed on Jan. 18, 2019.
Prior Publication US 2019/0225841 A1, Jul. 25, 2019
Int. Cl. C09J 7/38 (2018.01); C09J 7/21 (2018.01); C09J 7/20 (2018.01)
CPC C09J 7/385 (2018.01) [C09J 7/205 (2018.01); C09J 7/21 (2018.01); C09J 7/383 (2018.01); C09J 2301/124 (2020.08); C09J 2301/302 (2020.08); C09J 2301/312 (2020.08); C09J 2400/283 (2013.01); C09J 2407/006 (2013.01); C09J 2421/00 (2013.01); C09J 2423/003 (2013.01); C09J 2433/00 (2013.01); C09J 2433/003 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A pressure-sensitive adhesive tape comprising
a backing layer having a first and a second surface; and
a first pressure-sensitive adhesive layer affixed to the first surface;
a second pressure-sensitive adhesive layer affixed to the second surface;
wherein:
the first pressure-sensitive adhesive layer has an adhesive strength of 2.0 N/10 mm to 9.0 N/10 mm in absence of a solvent,
the second pressure-sensitive adhesive layer has an adhesive strength of 2.0 N/10 mm to 8.0 N/10 mm in absence of the solvent, and
when a 10 mm×80 mm area of the first pressure-sensitive adhesive layer is wetted by three drops of the solvent, the adhesive strength of the first pressure-sensitive adhesive layer has a difference of 1% to 20% from the adhesive strength of the first pressure-sensitive adhesive layer in the absence of the solvent, and when a 10 mm×80 mm area of the second pressure-sensitive adhesive layer is wetted by three drops of the solvent, the adhesive strength of the second pressure-sensitive adhesive layer has a difference of 1% to 20% from the adhesive strength of the second pressure-sensitive adhesive layer in the absence of the solvent, the solvent being a water-based solvent or an emulsion-based solvent; and
the pressure-sensitive adhesive tape has a tensile strength in longitudinal direction of 45 N/15 mm to 80 N/15 mm.