Display protector
Provided is a display protector including: a first transparent base layer having a first surface and a second surface which face each other; a second transparent base layer having a third surface and a fourth surface which face each other, and arranged so that the third surface faces the second surface; an intermediate stress relief adhesive layer arranged between the second surface and the third surface; a first outer stress relief adhesive layer over the first surface; a second outer stress relief adhesive layer over the fourth surface; and an ultra-thin glass (UTG) layer on the first outer stress relief adhesive layer.
1. A display protector comprising:
a first transparent base layer having a first surface and a second surface which face each other;
a second transparent base layer having a third surface and a fourth surface which face each other, and arranged so that the third surface faces the second surface;
an intermediate stress relief adhesive layer arranged between the second surface and the third surface;
a first outer stress relief adhesive layer over the first surface;
a second outer stress relief adhesive layer over the fourth surface; and
an ultra-thin glass (UTG) layer on the first outer stress relief adhesive layer,
wherein a material of the first transparent base layer is substantially the same as a material of the second transparent base layer, and wherein the material of the first transparent base layer and the second transparent base layer have a storage elastic modulus of about 2 GPa to about 6 GPa at −20° C.
2. The display protector of claim 1 , wherein a thickness of the first transparent base layer is substantially equal to a thickness of the second transparent base layer.
3. The display protector of claim 2 , wherein a thickness of the first outer stress relief adhesive layer is substantially equal to a thickness of the second outer stress relief adhesive layer.
4. The display protector of claim 1 , wherein a storage modulus of the first outer stress relief adhesive layer is less than or substantially equal to a storage modulus of the second outer stress relief adhesive layer.
5. The display protector of claim 1 , wherein a storage modulus of each of the first outer stress relief adhesive layer and the second outer stress relief adhesive layer is about 0.1 MPa to about 0.5 MPa at −20° C.
6. The display protector of claim 1 , wherein a storage modulus of each of the first outer stress relief adhesive layer and the second outer stress relief adhesive layer is about 0.02 MPa to about 0.2 MPa at +40° C.
7. The display protector of claim 6 , wherein;
a storage modulus of the intermediate stress relief adhesive layer is about 0.02 MPa to about 0.2 MPa at +40° C.; and
the storage modulus of the intermediate stress relief adhesive layer is greater than the storage modulus of the first outer stress relief adhesive layer and is less than the storage modulus of the second outer stress relief adhesive layer.
8. The display protector of claim 1 , wherein each of the first outer stress relief adhesive layer and the second outer stress relief adhesive layer has an adhesive strength of about 600 g f /in to about 1,500 g f /in.
9. The display protector of claim 1 , wherein there is no scattering-prevention coating layer on the UTG layer.