Glass substrate multilayer structure, manufacturing method thereof, and flexible display panel including the same
View Patent ↗Provided herein are glass substrate multilayer structure, a manufacturing method thereof, and a flexible display panel including the same. Also provided is a glass substrate multilayer structure that has remarkably good surface hardness, has remarkably good impact resistance, can provide for safety of a user by resisting scattering when the glass substrate is broken, and has excellent optical properties. The disclosure also relates to a manufacturing method the glass substrate multilayer structure, and a flexible display panel including the same.
1. A glass substrate multilayer structure, comprising:
a flexible glass substrate;
an anti-scattering layer comprising a soft polymer formed on one surface of the flexible glass substrate; and
a hard coating layer formed on the other surface of the flexible glass substrate,
wherein the anti-scattering layer comprises a (meth)acrylic crosslinked polymer and a polyimide polymer, and wherein the (meth)acrylic crosslinked polymer and the polyimide polymer are not covalently bonded to each other.
2. The glass substrate multilayer structure of claim 1 , wherein the (meth) acrylic crosslinked polymer includes an alkylene group, an ether group, a urethane group, an ester group, or a combination thereof.
3. The glass substrate multilayer structure of claim 1 , wherein the (meth) acrylic crosslinked polymer comprises a structural unit derived from a (meth) acrylic compound having 3 to 6 (meth)acrylic groups.
4. The glass substrate multilayer structure of claim 3 , wherein the (meth)acrylic compound comprises trimethylolpropane tri(meth)acrylate, trimethylolethane tri(meth)acrylate, 1,2,4-cyclohexanetri (meth) acrylate, pentaglycerol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol tetra (meth)acrylate, dipentaerythritol hexa(meth)acrylate, tripentaerythritol tri(meth)acrylate, tripentaerythritol hexa (meth)acrylate, polyfunctional urethane (meth)acrylate, polyfunctional polyester(meth)acrylate, or a combination thereof.
5. The glass substrate multilayer structure of claim 1 , wherein the polyimide polymer comprises a unit derived from a fluorine-containing aromatic diamine and a unit derived from an aromatic dianhydride.
6. The glass substrate multilayer structure of claim 1 , wherein the hard coating layer comprises a (meth) acrylic hard coating layer.
7. The glass substrate multilayer structure of claim 1 , wherein the flexible glass substrate has a thickness of 1 to 100 μm.
8. The glass substrate multilayer structure of claim 1 , wherein the anti-scattering layer has a thickness of 1 to 20 μm.
9. The glass substrate multilayer structure of claim 1 , wherein the hard coating layer has a thickness of about 1 to about 15 μm.
10. The glass substrate multilayer structure of claim 1 , wherein the glass substrate multilayer structure has a pencil hardness of about 4H to about 9H according to ASTM D3363.
11. The glass substrate multilayer structure of claim 1 , wherein the glass substrate multilayer structure has an impact resistance of about 10 cm or more in a pen drop test.
12. A flexible display panel comprising the glass substrate multilayer structure of claim 1 .
13. A method of manufacturing a glass substrate multilayer structure, comprising:
applying a composition comprising a polyimide precursor and a (meth)acrylic compound on one surface of a flexible glass substrate;
curing the composition comprising the polyimide precursor and the (meth)acrylic compound to form an anti-scattering layer comprising a soft polymer, wherein the anti-scattering layer comprises a (meth)acrylic crosslinked polymer and a polyimide polymer, and wherein the (meth)acrylic crosslinked polymer and the polyimide polymer are not covalently bonded to each other;
applying a hard coating composition on the other surface of the flexible glass substrate; and
curing the hard coating composition to form a hard coating layer.
14. The method of claim 13 , wherein the (meth)acrylic compound further includes an alkylene group, an ether group, a urethane group, an ester group, or a combination thereof.
15. The method of claim 13 , wherein the (meth) acrylic compound comprises 3 to 6 (meth)acrylic groups.
16. The method of claim 13 , wherein the (meth)acrylic compound comprises trimethylolpropane tri(meth)acrylate, trimethylolethane tri(meth)acrylate, 1,2,4-cyclohexanetri(meth)acrylate, pentaglycerol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol tetra (meth)acrylate, dipentaerythritol hexa(meth)acrylate, tripentaerythritol tri(meth)acrylate, tripentaerythritol hexa (meth)acrylate, polyfunctional urethane (meth)acrylate, polyfunctional polyester(meth)acrylate, or a combination thereof.
17. The method of claim 13 , wherein the polyimide precursor comprises a unit derived from a fluorine-containing aromatic diamine and a unit derived from an aromatic dianhydride.
18. The method of claim 13 , wherein the hard coating composition comprises a (meth) acrylic compound.