Method of manufacturing curved laminated glass and curved laminated glass
The present disclosure relates to a method of manufacturing a curved laminated glass and the curved laminated glass. The method comprises preparing a curved soda lime glass, providing a functional layer on one surface of an alkali-free glass, disposing a lamination film or a bonding agent between the curved soda lime glass and the functional layer, and elastically deforming the alkali-free glass, and laminating the alkali-free glass with the curved soda lime glass.
1. A method of manufacturing a curved laminated glass, the method comprising:
preparing a curved soda lime glass;
providing a functional layer directly on one surface of an alkali-free glass which is a flat plate;
disposing a lamination film or a bonding agent between the curved soda lime glass and the functional layer; and
elastically deforming the alkali-free glass having the functional layer thereon, and laminating the alkali-free glass having the functional layer thereon with the curved soda lime glass such that the alkali-free glass and the curved soda lime glass fit with each other and form the curved laminated glass,
wherein a fracture toughness ratio of the soda lime glass to the alkali-free glass is 1:1.41 to 1:1.62,
wherein a thickness ratio of the soda lime glass to the alkali-free glass is 1:0.2 to 1:0.6, and
wherein the functional layer is a transparent heat generating layer.
2. The method of claim 1 , wherein the alkali-free glass is elastically deformed at a temperature of 50° C. or less.
3. The method of claim 1 , further comprising:
heat treating the curved laminated glass at a temperature of 80° C. to 140° C.
4. The method of claim 1 , wherein the curvature of the elastically deformed alkali-free glass conforms to the curvature of the curved soda lime glass.
5. The method of claim 1 , wherein the alkali-free glass has a thickness of 0.3 mm to 1.0 mm.
6. A curved laminated glass comprising:
an alkali-free glass provided with a functional layer directly on one surface thereof; and
a soda lime glass laminated to the one surface of the alkali-free glass provided with the functional layer by a lamination film or a bonding agent,
wherein the alkali-free glass and the soda lime glass are bent while forming a curved surface in a state of being fit with each other, and
wherein a fracture toughness ratio of the soda lime glass to the alkali-free glass is 1:1.41 to 1:1.62,
wherein a thickness ratio of the soda lime glass to the alkali-free glass is 1:0.2 to 1:0.6, and
wherein the functional layer is a transparent heat generating layer.
7. The curved laminated glass of claim 6 , wherein the alkali-free glass has a thickness of 0.3 mm to 1.0 mm.
8. The curved laminated glass of claim 6 , wherein the curved laminated glass is a window for an automobile.