ADHESIVE LAYER-EQUIPPED TRANSPARENT PLATE AND ADHESIVE LAYER
To provide an adhesive layer-equipped transparent plate, which satisfies both visibility and impact resistance, and which is suitable for protection of an in-vehicle display device. The adhesive layer-equipped transparent plate according to the present invention comprises a transparent plate and an adhesive layer provided on one surface of the transparent plate. The transparent plate is a plate glass having a plate thickness of from 0.4 to 3.0 mm. The adhesive layer has a storage shear modulus of at most 30 MPa at a temperature of 25° C. and at a frequency of 1 Hz, a storage shear modulus of at least 50 MPa at a temperature of 25° C. and at a frequency of 40 kHz, and a loss tangent tanδ of at least 0.1 at a temperature of 25° C. and at a frequency of 40 kHz.
1 . An adhesive layer-equipped transparent plate, which comprises
a transparent plate, and
an adhesive layer provided on one surface of the transparent plate, wherein
the transparent plate is a plate glass having a plate thickness of from 0.4 to 3.0 mm, and
the adhesive layer has a storage shear modulus of at most 30 MPa at a temperature of 25° C. and at a frequency of 1 Hz, a storage shear modulus of at least 50 MPa at a temperature of 25° C. and at a frequency of 40 kHz, and a loss tangent tanδ of at least 0.1 at a temperature of 25° C. and at a frequency of 40 kHz.
2 . An adhesive layer-equipped transparent plate, which comprises
a transparent plate, and
an adhesive layer provided on one surface of the transparent plate, wherein
the transparent plate is a plate glass having a plate thickness of from 0.6 to 3.0 mm, and
the adhesive layer has a storage shear modulus of at most 30 MPa at a temperature of 25° C. and at a frequency of 1 Hz, a storage shear modulus of at least 50 MPa at a temperature of 25° C. and at a frequency of 40 kHz, and a loss tangent tanδ of at least 0.1 at a temperature of 25° C. and at frequency of 40 kHz.
3 . The adhesive layer-equipped transparent plate according to claim 1 , wherein the plate glass is a tempered glass having a compressive stress layer, the thickness of the compressive stress layer is at least 15 μm, and the surface compressive stress in the compressive stress layer is at least 650 MPa.
4 . The adhesive layer-equipped transparent plate according to claim 1 , wherein the adhesive layer has a storage shear modulus of at most 15 MPa at a temperature of 25° C. and at a frequency of 1 Hz.
5 . The adhesive layer-equipped transparent plate according to claim 1 , wherein the adhesive layer has a storage shear modulus of at least 80 MPa at a temperature of 25° C. and at a frequency of 40 kHz.
6 . The adhesive layer-equipped transparent plate according to claim 1 , wherein the adhesive layer has an interfacial peel strength of at least 600 N/225 mm 2 at a tensile speed of 4 m/s.
7 . The adhesive layer-equipped transparent plate according to claim 1 , wherein the thickness of the adhesive layer is from 30 to 2,000 μm.
8 . An adhesive layer capable of bonding a transparent plate and a display device, which has a storage shear modulus of at most 30 MPa at a temperature of 25° C. and at a frequency of 1 Hz, a storage shear modulus of at least 50 MPa at a temperature of 25° C. and at a frequency of 40 kHz, and a loss tangent tanδ of at least 0.1 at a temperature of 25° C. and at a frequency of 40 kHz.
9 . The adhesive layer according to claim 8 , which has a storage shear modulus of at most 15 MPa at a temperature of 25° C. and at a frequency of 1 Hz.
10 . The adhesive layer according to claim 8 , which has a storage shear modulus of at least 80 MPa at a temperature of 25° C. and at frequency of 40 kHz.
11 . The adhesive layer according to claim 8 , which has an interfacial peel strength of at least 600 N/225 mm 2 at a tensile speed of 4 m/s.
12 . The adhesive layer according to claim 8 , wherein the thickness of the adhesive layer is from 30 to 2,000 μm.