ADHESIVE LAYER ADHESIVE SHEET AND OPTICAL MEMBER

The present invention relates to an adhesive layer, an adhesive sheet, and an optical member, the adhesive layer being formed from an adhesive composition containing a cross-linking agent and a (meth) acrylic polymer containing a structural unit derived from a (meth) acrylic monomer having a hydroxyl group and having a ratio (Mz + 1/Mw) of a z + 1 average molecular weight (Mz + 1) to a weight-average molecular weight (Mw) of 5.5 or more; the adhesive force measured under condition A is 4.0 N/25 mm or more, and the adhesive force measured under condition B is 0.05 N/25 mm to 2.0 N/25 mm (in an atmosphere temperature of 23 ℃ and 50 % RH, an adhesive layer having a thickness of 15 μm adhered to a PET film is peeled from the PET film under conditions of a peeling angle (condition A: 45°, condition B: 180°) and a peeling speed of 300 mm/min). Accordingly, provided is an adhesive layer which hardly causes unintentional peeling even when stuck to an adherend having an inclination angle and exhibits light peelability when intentionally peeled. 수산기를 갖는 (메타)아크릴계 단량체에서 유래하는 구성 단위를 포함하고, z+1 평균분자량(Mz+1)과 중량평균분자량(Mw)의 비(Mz+1/Mw)가 5.5 이상인 (메타)아크릴계 중합체와 가교제를 포함하는 점착제 조성물에 의해 형성되고, 조건 A에서 측정되는 점착력이 4.0 N/25mm 이상이고, 또한 조건 B에서 측정되는 점착력이 0.05 N/25mm ~ 2.0 N/25mm인 점착제층, 점착시트, 및 광학 부재 [PET 필름에 첩합한 두께 15μm의 점착제층을 분위기 온도 23℃ 및 50 %RH의 환경 아래에서 박리각도 (조건 A : 45 °, 조건 B : 180 °) 및 박리속도 300mm/분의 조건에서 PET 필름으로부터 박리함].