After the shaft rod is bent for 180 degrees, the cracking can not occur, and the utility model has the advantages thatExcellent bending resistance effect, and can be applied to flexible display equipment.

Drawings

Fig. 1 is a schematic structural view of a naked-eye 3D film prepared in example 1.

In the figure: 1 is the substrate layer, 2 is the grating layer, and 3 is the filling layer.

Detailed Description

The present invention will be further described with reference to the following embodiments.

The starting materials in the examples and comparative examples are all commercially available, wherein:

bisphenol fluorenyl-containing urethane acrylate: korean american chemical HR6040 (refractive index of 1.62);

nano zirconia hybrid urethane acrylate: jiujiu chemical industry LM770 (refractive index 1.61), Korea chemton's CHTH-2760B (refractive index 1.617), Taiwan Changxing 6372 (refractive index 1.62);

bisphenol fluorenyl acrylic monomer: taiwan changxing EM2206 (refractive index 1.6);

nano zirconia hybrid acrylic monomer: chemical formulae D-513 (refractive index 1.67), D-113 (refractive index 1.65);

phenoxy ethyl acrylate: hua xiang kejie PHEA (refractive index 1.515);

fluorine-modified acrylic resin: the Shu-Right trades SFH-345LC (refractive index 1.345), SFH400LC (refractive index 1.4);

fluorine-modified acrylic acid monomer: hannong SFA-001 (refractive index 1.395), perfluoro methyl methacrylate;

urethane acrylate: adjuvant chemical SPU6610 (refractive index 1.45);

reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.

Examples 1 to 11

Embodiments 1 to 11 respectively provide a 3D film grating layer coating and a naked eye 3D film prepared therefrom, and the preparation method thereof includes the steps of:

the preparation method of the 3D film grating layer coating comprises the following steps:

and mixing the bisphenol fluorenyl-containing urethane acrylate and/or nano zirconia hybrid urethane acrylate, the bisphenol fluorenyl acrylic monomer and/or the nano zirconia hybrid acrylic monomer, the photoinitiator and the demolding auxiliary agent according to the table 1, and stirring to obtain the 3D film grating layer coating.

The preparation method of the naked eye 3D film comprises the following steps:

s1, mixing the components of a filling layer according to the raw material content in the table 1 to obtain a filling layer coating;

s2, coating a 3D film grating layer coating with the thickness of 80 microns on the surface of a PET film base material layer with the thickness of 100 microns in a glue dripping or roll-to-roll glue mode, rolling by using texture rollers with parallel arranged inverted trapezoidal table structures, and performing ultraviolet curing in the rolling process to obtain a grating layer with a cylindrical lens array;

s3, coating a filling layer coating with the thickness of 70 microns on the surface of the grating layer in a glue dripping or roll-to-roll glue mode, rolling by using a texture-free smooth roll, and performing ultraviolet curing in the rolling process to obtain the naked eye 3D film.

Wherein the power of the ultraviolet curing ultraviolet lamp in the steps S2 and S3 is 80-200W/cm²The energy is 400-1000 mj/cm²The curing time is 1-3 seconds, and the coating linear speed is 1-5 m/min.

TABLE 1 raw material contents (parts by weight) of naked eye 3D films of examples 1 to 11

Comparative examples 1 to 4

Comparative examples 1 to 4 respectively provide a 3D film grating layer coating and a naked eye 3D film prepared by the same, the preparation method is the same as that of the embodiment, and the raw material content is as shown in Table 2:

TABLE 2 raw material contents (parts by weight) of comparative examples 1 to 4 naked eye 3D films

Performance testing

The naked eye 3D films prepared in the above examples and comparative examples are subjected to performance tests, and the specific method is as follows:

refractive index: detecting refractive indexes n1 and n2 of the grating layer and the filling layer by using an Abbe refractometer respectively;

adhesion force: according to the method of GB/T1720-89, a paint film adhesion tester is adopted, and a hundred-grid experiment is utilized to test the adhesion of the grating layer to the substrate layer;

demolding property of the grating layer: when the grating layer coating is rolled by using a texture roller, the demolding performance of the coating is observed, and the demolding is level I without residual glue and demolding sound; demoulding has no residual glue and slight demoulding sound, and is grade II; demolding to obtain III grade product with residual glue;

bending resistance: bending the naked eye 3D film for 180 degrees around a shaft rod with a specific diameter, unfolding, bending for 180 degrees around the same direct shaft rod again, and bending for three times; whether the bent part is broken or cracked is observed, and the diameters of the shaft rods are respectively as follows:

the evaluation grade of the bending resistance is as follows:

the bending has no crack, fracture or cracking, and isgrade 1;

bending with cracks or fissures

No crack or crack is generated during bending, and the bending grade is 2;

with cracks or fissures in bends of the inner diameter mandrel

No crack or crack is generated during bending, and the grade is 3;

with cracks or fissures in bends of the inner diameter mandrel

No crack or crack is generated during bending, and the grade is 4;

with cracks or fissures in bends of the inner diameter mandrel

No crack or crack is generated during bending, and the grade is 5;

3D effect: visually, it was observed whether or not the 3D stereoscopic effect was exhibited.

The schematic structural diagram of the naked-eye 3D film prepared inembodiment 1 of the present invention is shown in fig. 1, where 1 is a substrate layer, i.e., a PET film, 2 is a grating layer having a lenticular lens array, and 3 is a filling layer.

The results of the performance tests of the examples and comparative examples are shown in Table 3.

TABLE 3 test results of examples and comparative examples

Performance of	Comparative example 1	Comparative example 2	Comparative example 3	Comparative example 4
					Grating layer refractive index n1	1.6106	1.580	1.5709	1.6140
The refractive index of the filling layer n2	1.3768	1.3768	1.3768	1.3768
					Adhesion force	5B	5B	5B	5B
Releasability from mold	Stage II	Class III	Class I	Stage II
					Resistance to bending	4 stage	4 stage	4stage	Grade	3
3D effects	NG	NG	NG	NG

According to the test results, the naked eye 3D film provided by the embodiments of the invention has the advantages that the 3D display effect is good, the adhesive force is 5B, and the demolding performance is good. Naked eye 3D films of examples 1-11

The inner bend was free from cracks or cracks, indicating excellent bending resistance.

In comparative example 1, the grating layer did not contain bisphenol fluorenyl acrylic monomer or nano zirconia hybrid acrylic monomer; the high refractive index UV monomer used in comparative example 2 is phenoxyethyl acrylate, and the prepared naked eye 3D film cannot achieve good bending resistance and can not be wound

The naked eye 3D film has cracks or complete fracture after the shaft rod is bent for 180 degrees. Compared with the prior art, the high-refractive-index UV resin used in the grating layer in the comparative example 3 is polyurethane acrylate, but not the bisphenol fluorene group-containing polyurethane acrylate or nano-zirconia hybrid polyurethane acrylate, so that the prepared naked eye 3D film grating layer has high hardness and poor bending resistance, and the refractive index of the grating layer is only 1.5709, so that the refractive index difference is less than 0.2, and the naked eye 3D display effect is influenced. Comparative example 4, the content of the high refractive index UV resin is too low, so that the strength of the grating layer is low, the demolding performance is further influenced, and the naked eye 3D film is formedIs poor in both bending resistance and 3D effect.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The 3D film grating layer coating is characterized by comprising the following components in parts by weight:

2. A 3D film grating layer coating according to claim 1, wherein the photoinitiator is one or more of 1-hydroxy-cyclohexyl-phenyl ketone, 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide, or phenyl bis (2,4, 6-trimethylbenzoyl) phosphine oxide.

3. The 3D film grating layer coating of claim 1, wherein the release aid is a wetting and leveling agent.

4. The method for preparing a 3D film grating layer coating according to any one of claims 1 to 3, comprising the following steps:

mixing bisphenol fluorenyl-containing urethane acrylate and/or nano zirconia hybrid urethane acrylate, bisphenol fluorenyl acrylic monomer and/or nano zirconia hybrid acrylic monomer, photoinitiator and demolding auxiliary agent, and stirring to obtain the 3D film grating layer coating.

5. A bending-resistant naked-eye 3D film comprises a substrate layer, a grating layer arranged on the substrate layer and a filling layer arranged on the grating layer, wherein the grating layer is provided with a cylindrical lens array, and the bending-resistant naked-eye 3D film is characterized in that the grating layer is prepared from the 3D film grating layer coating according to any one of claims 1-3.

6. The naked-eye 3D film according to claim 5, wherein the filling layer is prepared from the following components in parts by weight:

7. The naked eye 3D film according to claim 6, wherein the low refractive index UV resin is one or more of polyurethane acrylic resin, polyester acrylic resin or fluorine modified acrylic resin; the low refractive index UV monomer is a fluorine modified acrylic monomer.

8. The naked-eye 3D film according to claim 5, wherein the substrate layer is one or more of a PET film, a PC film, a TPU film or a PVC film.

9. The preparation method of the naked eye 3D film according to any one of claims 5 to 8, which is characterized by comprising the following steps:

10. Use of the naked-eye 3D film according to any one of claims 5 to 8 in the preparation of a flexible 3D display screen product.