A method for realizing low-temperature winding coating of UTG glass

Abstract

The present invention discloses a method for realizing low-temperature winding coating of UTG glass, comprising the following steps: S1: preparation of a composite flexible buffer fixing layer; S2. interlocking and fixing of UTG glass materials; the present invention first prepares a composite flexible buffer fixing layer, and utilizes the flexibility of the UTG glass to interlock it with the composite flexible buffer fixing layer, and the composite flexible buffer fixing layer carries the UTG glass to realize low-temperature winding coating in a vacuum coating chamber, thereby solving the problems of fragility and low yield of UTG glass.

Description

Technical Field

[0001] The present invention relates to the technical field of low-temperature coating of UTG glass, and in particular to a method for implementing low-temperature winding coating of UTG glass. Background Art

[0002] With the continuous development of flexible and lightweight smartphones, foldable screen phones have emerged. The cover glass currently used in foldable screen phones is ultra-thin flexible glass (UTG glass). UTG glass is less than 100um thick and flexible. After surface treatment, the glass has high impact resistance and bending properties, making UTG glass widely used in various electronics industries. For some special applications, it is necessary to sputter one or more layers of material on the surface of UTG glass to meet the different performance requirements of different electronics industries for UTG glass materials.

[0003] However, normal glass coating is sputtered under high temperature conditions. UTG glass is too thin, and normal high-temperature coating will have defects such as UTG glass being fragile and low yield rate; under low temperature conditions, there is a problem of poor adhesion.

[0004] Therefore, a new UTG glass processing method is needed to solve the problems encountered by the above-mentioned UTG glass during the coating process, which is a major problem that needs to be solved urgently. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a method for realizing low-temperature winding coating of UTG glass. First, a composite flexible buffer fixing layer is prepared, and the flexibility of UTG glass is utilized to make it embedded with the composite flexible buffer fixing layer. The composite flexible buffer fixing layer can carry the UTG glass to realize low-temperature winding coating in the vacuum coating chamber, thereby solving the problems of fragility and low yield of UTG glass.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for implementing low-temperature roll-to-roll coating of UTG glass comprises the following steps:

[0008] S1: Preparation of composite flexible buffer fixing layer:

[0009] S101. Lamination of the first mesh material: Laminating a first mesh material having a thickness of 5-10 μm on the surface of a flexible adhesive-backed base having a thickness of 110-125 μm;

[0010] S102. Lamination of a first flexible substrate: Laminating a first flexible substrate having a thickness of 15-20 μm and double-sided adhesive tape on the surface of the first grid material;

[0011] S103. Laminating the second mesh material: Laminating a second mesh material having a thickness of 5-10 μm on the surface of the first flexible substrate with an adhesive backing;

[0012] S104. Laminating the second flexible substrate: Laminating a layer of a second flexible substrate with a thickness of 15-20 μm and a single-sided adhesive on the surface of the second mesh material to obtain a composite flexible buffer fixed layer having a structure from bottom to top of the first mesh material, the first flexible substrate, the second mesh material, and the second flexible substrate;

[0013] S2. Mosaic fixation of UTG glass material:

[0014] S201. Grooving the surface of the flexible buffer fixed layer, controlling the size of the grooves so that the groove size relative to the UTG glass material on each side of the size of each expansion 0.03-0.08mm;

[0015] S202. Remove the flexible buffer fixing layer material in the groove until the adhesive on the surface of the flexible base is exposed, and place the cut and trimmed UTG glass material in the groove of the flexible buffer fixing layer. Attach the glass on the flat surface to control the generation of bubbles during the attachment process.

[0016] S203. Coat a layer of adhesive on the surface of the composite flexible buffer fixing layer after the surface is grooved, and adhere a layer of mesh material with a thickness of 5-10 μm to obtain a composite structure UTG glass material that can achieve low-temperature winding coating.

[0017] Preferably, after step S203, the following steps are further included:

[0018] S3. The composite structure UTG glass material is rolled up onto a composite structure UTG glass material roll core and placed into a low-temperature coating device for low-temperature coating treatment.

[0019] Preferably, in S101, the flexible base layer with adhesive backing is one or more of PET, PA, CPI, TPU, PI, PVA, PEN, and PDMS.

[0020] Preferably, in S101, S103, and S203, the corresponding first mesh material, the second mesh material, and the mesh material are all selected from one or more of PET, PA, CPI, TPU, PI, PVA, PEN, and PDMS.

[0021] Preferably, in S102 and S104, the corresponding first flexible substrate and second flexible substrate are one or more of PET, PA, CPI, TPU, PI, PVA, PEN, and PDMS.

[0022] Preferably, in S104, the total thickness of the composite flexible buffer fixing layer is 50-55 μm.

[0023] Preferably, the back glue is one or more of acrylic glue, epoxy resin glue, silicone glue, polyacrylic acid, and PU glue; the viscosity of the back glue is 3-20g / 25mm.

[0024] Preferably, in S202, the thickness range of the UTG glass material is limited to 30-40 μm.

[0025] Preferably, in S104, the adhesive-backed surface of the second flexible substrate with adhesive on one side faces the upper surface of the second mesh material.

[0026] Preferably, the process parameters of the low-temperature coating are: low-temperature coating main drum temperature ≤ 25°C, sputtering temperature ≤ 80°C.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The composite flexible buffer fixing layer prepared according to the solution provided by the present invention utilizes the flexibility of UTG glass to firmly embed the UTG glass material and the composite flexible buffer fixing layer together, and then the composite flexible buffer fixing layer carries the UTG glass to realize low-temperature winding coating in the vacuum coating chamber, solving the problems of fragility and low yield of UTG glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a process flow chart for preparing a composite flexible buffer fixed layer in the method for realizing low-temperature roll-to-roll coating of UTG glass of the present invention;

[0030] Figure 2 This is a process flow chart for the interlocking and fixing of UTG glass materials in the method for achieving low-temperature roll-to-roll coating of UTG glass of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] See also Figure 1-2 , the present invention provides a technical solution:

[0033] Example 1:

[0034] A method for achieving low-temperature roll-to-roll coating of UTG glass:

[0035] S1: Preparation of composite flexible buffer fixing layer:

[0036] S101. Lamination of PA mesh material: Laminating a 5μm thick PA mesh material on the surface of a 110μm thick PET flexible substrate with a silicone backing;

[0037] S102. Laminating PET flexible substrate: Laminating a layer of 15 μm thick double-sided PET flexible substrate with silicone adhesive on the surface of the PA grid material;

[0038] S103. Lamination of PA mesh material: Lamination of a 5μm thick layer of PA mesh material on the surface of the PET flexible substrate with silicone adhesive backing;

[0039] S104. Laminating the PET flexible substrate: Laminating a 15 μm thick layer of PET flexible substrate with a silicone adhesive on one side to the surface of the PA mesh material, thereby obtaining a composite flexible buffer fixing layer having a structure of PA mesh material, PET flexible substrate, PA mesh material, and PET flexible substrate from bottom to top;

[0040] S2. Mosaic fixation of UTG glass material:

[0041] S201. Grooving the surface of the flexible buffer fixing layer, controlling the size of the grooves so that the groove size is expanded by 0.03mm relative to the size of each side of the UTG glass material;

[0042] S202. Remove the flexible buffer fixing layer material in the groove until the silicone adhesive on the surface of the flexible base is exposed, and place the cut and trimmed 30μm UTG glass material in the groove of the flexible buffer fixing layer. Attach the glass material on a flat surface to ensure that no bubbles are generated during the attachment process.

[0043] S203. A layer of silicone adhesive is applied to the surface of the composite flexible buffer fixing layer after the surface grooves are formed, and a layer of 5 μm thick PA mesh material is attached to obtain a composite structure UTG glass material capable of achieving low-temperature roll-to-roll coating.

[0044] The viscosity of the silicone adhesive used in the above steps is 10g / 25mm.

[0045] After testing, the above-mentioned composite structure UTG glass material can be successfully rolled into a composite structure UTG glass material roll core, and put into low-temperature coating equipment for further low-temperature coating treatment under the process parameters of low-temperature coating main drum temperature of 20°C and sputtering temperature of 60°C.

[0046] Example 2:

[0047] A method for achieving low-temperature roll-to-roll coating of UTG glass:

[0048] S1: Preparation of composite flexible buffer fixing layer:

[0049] S101. Lamination of CPI mesh material: Laminating a 10 μm thick layer of CPI mesh material to a 125 μm thick PET flexible substrate with epoxy resin adhesive backing;

[0050] S102. Laminating PET flexible substrate: Laminating a 20 μm thick layer of double-sided epoxy resin adhesive PET flexible substrate to the surface of the CPI grid material;

[0051] S103. Laminating CPI mesh material: Laminating a layer of CPI mesh material with a thickness of 10 μm on the surface of the PET flexible substrate with epoxy resin adhesive backing;

[0052] S104. Laminating the PET flexible substrate: Laminating a 20 μm thick layer of PET flexible substrate with epoxy resin adhesive on one side to the surface of the CPI mesh material, thereby obtaining a composite flexible buffer fixing layer having a structure from bottom to top of CPI mesh material, PET flexible substrate, CPI mesh material, and PET flexible substrate;

[0053] S2. Mosaic fixation of UTG glass material:

[0054] S201. Grooving the surface of the flexible buffer fixing layer, controlling the size of the grooves so that the groove size is expanded by 0.08mm relative to each side of the UTG glass material;

[0055] S202. Remove the flexible buffer fixing layer material in the groove until the epoxy resin adhesive on the surface of the flexible base is exposed, and place the cut and trimmed 40μm UTG glass material in the groove of the flexible buffer fixing layer. Attach the glass material on a flat surface to ensure that no bubbles are generated during the attachment process.

[0056] S203. A layer of epoxy resin adhesive is applied to the surface of the composite flexible buffer fixed layer after the surface grooves are formed, and a layer of CPI mesh material with a thickness of 10 μm is attached to obtain a composite structure UTG glass material capable of achieving low-temperature roll-to-roll coating;

[0057] The epoxy resin adhesive used in the above steps has a viscosity of 25 g / mm.

[0058] After testing, the above-mentioned composite structure UTG glass material can be successfully rolled into a composite structure UTG glass material roll core, and put into low-temperature coating equipment for further low-temperature coating treatment under the process parameters of low-temperature coating main drum temperature of 25°C and sputtering temperature of 80°C.

[0059] Example 3:

[0060] A method for achieving low-temperature roll-to-roll coating of UTG glass:

[0061] S1: Preparation of composite flexible buffer fixing layer:

[0062] S101. Laminating PEN mesh material: Laminating a layer of 8 μm thick PEN mesh material to the surface of a 120 μm thick PVA flexible substrate with epoxy resin adhesive backing;

[0063] S102. Laminating a PVA flexible substrate: Laminating a 17 μm thick layer of double-sided epoxy adhesive-backed PVA flexible substrate to the surface of the PEN mesh material;

[0064] S103. Laminating PEN mesh material: Laminating a layer of 8 μm thick PEN mesh material to the surface of the PVA flexible substrate with epoxy resin adhesive backing;

[0065] S104. Laminating a PVA flexible substrate: Laminating a 17 μm thick layer of a PVA flexible substrate with an epoxy resin adhesive backing on one side to the surface of the PEN mesh material, thereby obtaining a composite flexible buffer fixing layer having a structure from bottom to top of PEN mesh material, PVA flexible substrate, PEN mesh material, and PVA flexible substrate;

[0066] S2. Mosaic fixation of UTG glass material:

[0067] S201. Grooving the surface of the flexible buffer fixing layer, controlling the size of the grooves so that the groove size is expanded by 0.05mm relative to the size of each side of the UTG glass material;

[0068] S202. Remove the flexible buffer fixing layer material in the groove until the epoxy resin adhesive on the surface of the flexible base is exposed, and place the cut and trimmed 35μm UTG glass material in the groove of the flexible buffer fixing layer. Attach the glass material on a flat surface, ensuring that no bubbles are generated during the attachment process.

[0069] S203. A layer of epoxy resin adhesive is applied to the surface of the composite flexible buffer fixing layer after the surface grooves are formed, and a layer of PEN mesh material having a thickness of 7 μm is attached to obtain a composite structure UTG glass material capable of achieving low-temperature roll-to-roll coating;

[0070] The epoxy resin adhesive used in the above steps has a viscosity of 15 g / mm.

[0071] After testing, the above-mentioned composite structure UTG glass material can be successfully rolled into a composite structure UTG glass material roll core, and put into low-temperature coating equipment for further low-temperature coating treatment under the process parameters of low-temperature coating main drum temperature of 23°C and sputtering temperature of 70°C.

[0072] Example 4:

[0073] A method for achieving low-temperature roll-to-roll coating of UTG glass:

[0074] S1: Preparation of composite flexible buffer fixing layer:

[0075] S101. Laminating the TPU mesh material: Laminating a 7 μm thick TPU mesh material to the surface of a 120 μm thick PDMS flexible substrate with epoxy resin adhesive backing;

[0076] S102. Laminating a PDMS flexible substrate: Laminating a 16 μm thick layer of double-sided epoxy adhesive-backed PDMS flexible substrate to the surface of the TPU mesh material;

[0077] S103. Laminating the TPU mesh material: Laminating a 7 μm thick layer of TPU mesh material to the surface of the PDMS flexible substrate with epoxy resin adhesive backing;

[0078] S104. Laminating the PDMS flexible substrate: Laminating a 15 μm thick layer of a PDMS flexible substrate with an epoxy resin adhesive on one side on the surface of the TPU mesh material to obtain a composite flexible buffer fixed layer having a structure from bottom to top of TPU mesh material, PDMS flexible substrate, TPU mesh material, and PDMS flexible substrate;

[0079] S2. Mosaic fixation of UTG glass material:

[0080] S201. Grooving the surface of the flexible buffer fixing layer, controlling the size of the grooves so that the groove size is expanded by 0.04mm relative to the size of each side of the UTG glass material;

[0081] S202. Remove the flexible buffer fixing layer material in the groove until the epoxy resin adhesive on the surface of the flexible base is exposed, and place the cut and trimmed 32μm UTG glass material in the groove of the flexible buffer fixing layer. Attach the glass material on a flat surface to ensure that no bubbles are generated during the attachment process.

[0082] S203. A layer of epoxy resin adhesive is applied to the surface of the composite flexible buffer fixing layer after the surface grooves are formed, and a layer of 8 μm thick TPU mesh material is attached to obtain a composite structure UTG glass material capable of low-temperature roll-to-roll coating;

[0083] The epoxy resin adhesive used in the above steps has a viscosity of 8 g / mm.

[0084] After testing, the above-mentioned composite structure UTG glass material can be successfully rolled into a composite structure UTG glass material roll core, and put into low-temperature coating equipment for further low-temperature coating treatment under the process parameters of low-temperature coating main drum temperature of 22°C and sputtering temperature of 75°C.

[0085] Example 5:

[0086] A method for achieving low-temperature roll-to-roll coating of UTG glass:

[0087] S1: Preparation of composite flexible buffer fixing layer:

[0088] S101. PI mesh material bonding: Laminating a 6μm thick PI mesh material to the surface of a 120μm thick PA flexible substrate with epoxy resin adhesive backing;

[0089] S102. Lamination of PA flexible substrate: Lamination of a 15 μm thick layer of double-sided epoxy adhesive PA flexible substrate on the surface of the PI grid material;

[0090] S103. PI mesh material bonding: Laminating a layer of 8μm thick PI mesh material to the surface of the PA flexible substrate with epoxy resin adhesive backing;

[0091] S104. Laminating the PA flexible substrate: Laminating a 17 μm thick layer of PA flexible substrate with epoxy resin adhesive on one side to the surface of the PI mesh material, thereby obtaining the composite flexible buffer fixing layer having a structure of PI mesh material, PA flexible substrate, PI mesh material, and PA flexible substrate from bottom to top;

[0092] S2. Mosaic fixation of UTG glass material:

[0093] S201. Grooving the surface of the flexible buffer fixing layer, controlling the size of the grooves so that the groove size is expanded by 0.06mm relative to the size of each side of the UTG glass material;

[0094] S202. Remove the flexible buffer fixing layer material in the groove until the epoxy resin adhesive on the surface of the flexible base is exposed, and place the cut and trimmed 37μm UTG glass material in the groove of the flexible buffer fixing layer. Attach the glass material on a flat surface to ensure that no bubbles are generated during the attachment process.

[0095] S203. A layer of epoxy resin adhesive is applied to the surface of the composite flexible buffer fixing layer after the surface grooves are formed, and a layer of 8 μm thick PI mesh material is attached to obtain a composite structure UTG glass material capable of achieving low-temperature roll-to-roll coating;

[0096] The epoxy resin adhesive used in the above steps has a viscosity of 12 g / mm.

[0097] After testing, the above-mentioned composite structure UTG glass material can be successfully rolled into a composite structure UTG glass material roll core, and put into low-temperature coating equipment for further low-temperature coating treatment under the process parameters of low-temperature coating main drum temperature of 23°C and sputtering temperature of 65°C.

[0098] The composite structure UTG glass materials after low-temperature coating of Examples 1-5 were tested to test performance parameters such as transmittance fluctuation range and color index b-value fluctuation range. The test results are shown in Table 1:

[0099] Transmittance fluctuation range Color index b value fluctuation range Example 1 ±0.3％ ±0.1 Example 2 ±0.3％ ±0.1 Example 3 ±0.3％ ±0.1 Example 4 ±0.3％ ±0.1 Example 5 ±0.3％ ±0.1

[0100] The experimental data in the table show that the composite structure UTG glass material prepared by the technical solutions provided in Examples 1-5 has a transmittance fluctuation range of ±0.3% and a color index b value fluctuation range of ±0.1 after low-temperature coating, and the performance consistency between products is high and the yield rate is high; this can strongly prove that the technical solution provided by the present invention, on the basis of preparing a composite flexible buffer fixed layer, utilizes the flexibility of UTG glass to make it embedded with the composite flexible buffer fixed layer, and can successfully make the composite flexible buffer fixed layer carry UTG glass to achieve low-temperature winding coating in the vacuum coating chamber, thereby solving the problems of fragility and low yield rate of UTG glass.

[0101] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for achieving low-temperature roll-to-roll coating of UTG glass, characterized in that: The following steps are involved: S1: Preparation of composite flexible buffer fixing layer: S101. Lamination of the first mesh material: Laminating a first mesh material having a thickness of 5-10 μm on the surface of a flexible adhesive-backed base having a thickness of 110-125 μm; S102. Lamination of a first flexible substrate: Laminating a first flexible substrate having a thickness of 15-20 μm and double-sided adhesive tape on the surface of the first grid material; S103. Laminating the second mesh material: Laminating a second mesh material having a thickness of 5-10 μm on the surface of the first flexible substrate with an adhesive backing; S104. Laminating the second flexible substrate: Laminating a layer of a second flexible substrate with a thickness of 15-20 μm and a single-sided adhesive on the surface of the second mesh material to obtain a composite flexible buffer fixed layer having a structure from bottom to top of the first mesh material, the first flexible substrate, the second mesh material, and the second flexible substrate; S2. Mosaic fixation of UTG glass material: S201. Grooving the surface of the flexible buffer fixed layer, controlling the size of the grooves so that the groove size relative to the UTG glass material on each side of the size of each expansion 0.03-0.08mm; S202. Remove the flexible buffer fixing layer material in the groove until the adhesive on the surface of the flexible base is exposed, and place the cut and trimmed UTG glass material in the groove of the flexible buffer fixing layer. Attach the glass on the flat surface to control the generation of bubbles during the attachment process. S203. A layer of adhesive is applied to the surface of the composite flexible buffer fixed layer after the surface grooves are formed, and a layer of 5-10 μm thick mesh material is attached to obtain a composite structure UTG glass material capable of achieving low-temperature roll-to-roll coating; S3. The composite structure UTG glass material is rolled up onto a composite structure UTG glass material roll core and placed into a low-temperature coating device for low-temperature coating treatment.

2. The method for achieving low-temperature roll-to-roll coating of UTG glass according to claim 1, characterized in that: In S101, the flexible base layer with adhesive backing is one or more of PET, PA, CPI, TPU, PI, PVA, PEN, and PDMS.

3. The method for achieving low-temperature roll-to-roll coating of UTG glass according to claim 1, characterized in that: In S101, S103, and S203, the corresponding first mesh material, the second mesh material, and the mesh material are all selected from one or more of PET, PA, CPI, TPU, PI, PVA, PEN, and PDMS.

4. The method for achieving low-temperature roll-to-roll coating of UTG glass according to claim 1, characterized in that: In S102 and S104 , the corresponding first flexible substrate and second flexible substrate are one or more of PET, PA, CPI, TPU, PI, PVA, PEN, and PDMS.

5. The method for achieving low-temperature roll-to-roll coating of UTG glass according to claim 1, characterized in that: In S104, the total thickness of the composite flexible buffer fixing layer is 50-55 μm.

6. The method for achieving low-temperature roll-to-roll coating of UTG glass according to claim 2, characterized in that: The back glue is one or more of acrylic glue, epoxy resin glue, silicone glue, polyacrylic acid, and PU glue; the viscosity of the back glue is 3-20g / 25mm.

7. The method for achieving low-temperature roll-to-roll coating of UTG glass according to claim 1, characterized in that: In S202, the thickness range of the UTG glass material is limited to 30-40 μm.

8. The method for implementing low-temperature roll-to-roll coating on UTG glass according to claim 1, characterized in that: In S104 , the adhesive-backed surface of the second flexible substrate with adhesive on one side faces the upper surface of the second mesh material.

9. The method for implementing low-temperature roll-to-roll coating on UTG glass according to claim 1, characterized in that: The process parameters of the low-temperature coating are: the temperature of the low-temperature coating main drum is ≤25°C, and the sputtering temperature is ≤80°C.

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