Transparent laminated film, display device and method for manufacturing transparent laminated film

1. A transparent laminated film, used for covering a display side of a display panel, comprising a first film layer, a central film layer, and a second film layer which are sequentially stacked,

wherein each of a material of the first film layer and a material of the second film layer comprises a thermoplastic plastic, and a material of the central film layer comprises a thermosetting plastic,

wherein a transmittance of the central film layer is greater than 90%, and an elastic modulus of the central film layer is greater than 6 Gpa,

wherein the transmittance of the central film layer is greater than a transmittance of the first film layer and greater than a transmittance of the second film layer.

2. The transparent laminated film according to claim 1 , wherein the thermoplastic plastic comprises thermoplastic polyimide, and the thermosetting plastic comprises thermosetting polyimide.

3. The transparent laminated film according to claim 1 , wherein the elastic modulus of the central film layer is greater than an elastic modulus of the first film layer and greater than an elastic modulus of the second film layer.

4. The transparent laminated film according to claim 1 , wherein at least one of the group consisting of a transmittance of the first film layer and a transmittance of the second film layer is greater than 70%, and

at least one of the group consisting of the elastic modulus of the first film layer and the elastic modulus of the second film layer is greater than 2.5 GPa.

5. The transparent laminated film according to claim 1 , wherein an overall transmittance of the transparent laminated film is greater than 85%, and an overall elastic modulus of the transparent laminated film is greater than 5.5 GPa.

6. The transparent laminated film according to claim 1 , wherein a thickness of the central film layer ranges from 50 μm to 80 μm, and at least one of the group consisting of a thickness of the first film layer and a thickness of the second film layer ranges from 5 μm to 10 μm.

7. The transparent laminated film according to claim 1 , wherein a glass transition temperature of the central film layer is greater than 400° C., and at least one of the group consisting of a glass transition temperature of the first film layer and a glass transition temperature of the second film layer ranges from 220° C. to 260° C.

8. The transparent laminated film according to claim 1 , further comprising a protective layer,

wherein the protective layer is stacked on a side, away from the central film layer, of the first film layer or the second film layer, and

a hardness of the protective layer is greater than a hardness of the first film layer or a hardness of the second film layer.

9. The transparent laminated film according to claim 8 , wherein a thickness of the protective layer ranges from 5 μm to 10 μm.

10. A display device, comprising:

a display panel, and

the transparent laminated film according to claim 1 ,

wherein the transparent laminated film covers a display side of the display panel.

11. The display device according to claim 10 , wherein the display panel is a flexible organic light-emitting diode display panel.

12. The display device according to claim 10 , further comprising a polarizer and a touch structure layer,

wherein the polarizer and the touch structure layer are stacked between the display panel and the transparent laminated film.

13. The display device according to claim 10 , wherein the transparent laminated film further comprises a protective layer,

the protective layer is stacked on a side, away from the display panel, of the transparent laminated film, and a hardness of the protective layer is greater than a hardness of the first film layer or a hardness of the second film layer.

14. A method for manufacturing the transparent laminated film according to claim 1 , comprising:

stacking the first film layer and the second film layer on both sides of the central film layer by hot pressing, respectively.

15. The method for manufacturing the transparent laminated film according to claim 14 , wherein the hot pressing comprises hot pressing by a roller or hot pressing by a laminate.

16. The method for manufacturing the transparent laminated film according to claim 14 , wherein a temperature of the hot pressing ranges from 300° C. to 350° C., a pressure of the hot pressing ranges from 0.8N to 1.0N, and a duration of the hot pressing ranges from 10 seconds to 30 seconds.

17. A transparent laminated film, used for covering a display side of a display panel, comprising a first film layer, a central film layer, and a second film layer which are sequentially stacked,

wherein each of a material of the first film layer and a material of the second film layer comprises a thermoplastic plastic, and a material of the central film layer comprises a thermosetting plastic,

wherein at least one of the group consisting of a transmittance of the first film layer and a transmittance of the second film layer is greater than 70%, and

at least one of the group consisting of an elastic modulus of the first film layer and an elastic modulus of the second film layer is greater than 2.5 Gpa,

wherein the transmittance of the central film layer is greater than a transmittance of the first film layer and greater than a transmittance of the second film layer.