Manufacturing method of windable glass

Abstract

The invention discloses a manufacturing method of windable glass, which comprises the following steps: 1) selecting glass with corresponding thickness according to the actual size of a product; 2) cleaning the to-be-processed surface of the glass; 3) carrying out slotting and half-breaking on the whole glass processing surface by adopting a half-breaking etching process; (4) filling a high polymer material into the groove on the surface of the glass after slotting and semi-breaking until the groove is filled and leveled up; and 5) curing the surface of the glass filled with the high polymer material to obtain the windable glass. According to the method, a half-breaking etching process is adopted on the glass with the thickness of 0.1-0.6 mm, a half-breaking groove is etched in a glass winding area, and the groove is filled with a high polymer material, so that a flat plane is provided for subsequent processing, and meanwhile, the selected high polymer material has the refractive index and the light transmittance which are consistent with those of the glass; and obvious film printing in the winding process of the glass due to the overlarge size of the groove can be effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of windable glass processing, in particular to a method for manufacturing windable glass. Background Art

[0002] Rollable glass refers to the use of a semi-etching process in the glass winding area, which gives the glass excellent rollability, while the unetched glass surface serves as the first contact surface, OLED display substrate, micro LED mass transfer substrate, etc.

[0003] Traditional rollable glass is made windable by evenly punching holes in the winding area on the glass surface with a thickness of more than 0.03mm through a punching technology; the punched through-hole size is 0.15-0.4mm wide and 3.5-6.5mm long. Such a large hole area is prone to dust accumulation during the winding process, resulting in poor display of the winding area. In addition, the large hole area is greatly deformed during the winding process and is prone to obvious film printing. Summary of the invention

[0004] The purpose of the present invention is to provide a method for manufacturing rollable glass in view of the shortcomings of the prior art. The method adopts a semi-interrupted etching process on glass with a thickness of 0.1 to 0.6 mm, etches a semi-interrupted groove in the glass winding area, and fills the groove with a polymer material. While providing a flat surface for subsequent processing, the selected polymer material has a refractive index and transmittance consistent with the glass, which can effectively avoid obvious film marks on the glass during the winding process due to the excessive size of the groove.

[0005] To achieve the above purpose, the present invention adopts the following technical solution.

[0006] A method for manufacturing rollable glass comprises the following steps:

[0007] Step 1: Select glass of corresponding thickness according to the actual size of the product;

[0008] Step 2, clean the glass surface to be processed;

[0009] Step 3, using a half-cut etching process to groove and half-cut the entire glass processing surface;

[0010] Step 4, filling the polymer material into the groove on the glass surface after the half-cut groove until the groove is filled;

[0011] Step 5: Curing the surface of the glass filled with the polymer material to obtain a rollable glass.

[0012] Specifically, in step 1, glass of corresponding thickness is selected, and the thickness of the selected glass is 0.1-0.6 mm.

[0013] Furthermore, the groove width is 0.02-5 mm; and the minimum distance from the bottom of the groove to the unetched glass surface after the groove is half-broken is 10-100 μm.

[0014] Specifically, in step 3, the entire glass processing surface is grooved and half-cut by using a half-cut etching process, and the cross-sectional shape of the grooved and half-cut is a comb-shaped, wedge-shaped, or arc-shaped groove or one or more groove shapes arranged in a certain pattern.

[0015] Specifically, in step 4, the polymer material is filled into the groove on the surface of the half-cut glass until the groove is filled. When the rollable glass is used as an OLED substrate / Micro LED mass transfer carrier substrate, the material of the polymer material is one or two of acrylic polymers, silicone resins, epoxy resins, or polyurethane resins, and the solid content of the polymer material is 100%.

[0016] Specifically, in step 5, the glass surface after being filled with the polymer material is cured by one or two of thermal curing, moisture curing or UV curing. The elongation at break after curing is greater than 10%, and R1.0 is bent 200,000 times @-20℃&60℃ / 90%&70℃ without breakage.

[0017] Specifically, when the rollable glass is used as a glass cover plate, the refractive index after the polymer material is filled and solidified is 1.49-1.53; the light transmittance is greater than 90% and the haze is less than 0.5%.

[0018] Furthermore, the rollable glass is used as a glass cover for a foldable mobile phone or a foldable tablet.

[0019] Furthermore, the rollable glass is used as an OLED substrate or a Micro LED mass transfer carrier substrate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention adopts a semi-interrupted etching process on glass with a thickness of 0.1 to 0.6 mm, etches a semi-interrupted groove in the glass winding area, and fills the groove with a polymer material. While providing a flat surface for subsequent processing, the selected polymer material has a refractive index and transmittance consistent with the glass, which can effectively avoid obvious film marks on the glass during the winding process due to the excessive size of the groove.

[0022] 2. The present invention adopts a semi-interrupted etching method to open holes in the glass winding area. Compared with the traditional hole opening method, the process is simple, the etching raw materials are easy to purchase, and the hole surface is flat and smooth after opening, which is convenient for filling polymer materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a flow chart of the method for manufacturing the rollable glass of the present invention;

[0024] Figure 2 It is a top view of a half-cut groove of the rollable glass of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the present invention when the half-cross-section of the windable glass groove is comb-shaped;

[0026] Figure 4 It is a schematic structural diagram of the rollable glass groove of the present invention when the half-cross section is wedge-shaped;

[0027] Figure 5 It is a schematic structural diagram of the rollable glass groove of the present invention when the half-cross section is an arc;

[0028] Figure 6 It is a schematic structural diagram of the present invention when the cross section of the half section of the windable glass groove is a mixed shape;

[0029] Figure 7 It is a cross-sectional schematic diagram of the rollable glass groove after being filled with polymer material according to the present invention. DETAILED DESCRIPTION

[0030] In order to better reflect the advantages and innovations of the present invention and clearly demonstrate the technical solution of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments.

[0031] Example

[0032] like Figure 1 As shown, the present invention provides a method for manufacturing rollable glass, comprising the following steps:

[0033] Step 1: Select glass of corresponding thickness according to the actual size of the product;

[0034] Step 2, clean the glass surface to be processed;

[0035] Step 3, using a half-cut etching process to groove and half-cut the entire glass processing surface;

[0036] Step 4, filling the polymer material into the groove on the glass surface after the half-cut groove until the groove is filled;

[0037] Step 5: Curing the surface of the glass filled with the polymer material to obtain a rollable glass.

[0038] Specifically, in this embodiment, in order to ensure the performance of the windable glass obtained by processing, the glass of corresponding thickness is selected in step 1, and the thickness of the selected glass is 0.1-0.6 mm; the groove width is 0.02-5 mm; and the minimum distance from the bottom of the groove to the unetched glass surface after the groove is half-broken is 10-100 μm.

[0039] Specifically, Figure 2 As shown, in step 3, the half-cut etching process is used to groove and half-cut the entire glass processing surface, such as Figure 3-Figure 6 As shown, the slotted half-section has a comb-shaped, wedge-shaped, or arc-shaped groove shape or multiple groove shapes arranged in a certain pattern.

[0040] Specifically, Figure 7 As shown, in step 4, the polymer material is filled into the groove on the surface of the glass after the groove is half-cut until the groove is filled. When the rollable glass is used as an OLED substrate / Micro LED mass transfer carrier substrate, the material of the polymer material is one or two of acrylic polymers or silicone resins or epoxy resins or polyurethane resins, and the solid content of the polymer material is 100%.

[0041] Specifically, in step 5, the glass surface after being filled with the polymer material is cured by one or two of thermal curing, moisture curing or UV curing. The elongation at break after curing is greater than 10%, and R1.0 is bent 200,000 times @-20℃&60℃ / 90%&70℃ without breakage.

[0042] Specifically, when the rollable glass is used as a glass cover plate, the refractive index after the polymer material is filled and solidified is 1.49-1.53; the light transmittance is greater than 90% and the haze is less than 0.5%.

[0043] Furthermore, the rollable glass is used as a glass cover for a foldable mobile phone or a foldable tablet.

[0044] Furthermore, the rollable glass is used as an OLED substrate or a Micro LED mass transfer carrier substrate.

[0045] The performance of the rollable glass produced according to the method of the present invention is further tested and explained through comparative tests.

[0046] 1. Appearance inspection

[0047] 20 observers were randomly selected to observe the folding display screen made by using the rollable glass made by the method of the present invention and the traditional rollable glass as the glass cover plate, and the observers observed obvious hole prints in the rolled-up state of the display screen. The results are shown in Table 1 below.

[0048] 2. Drop ball test

[0049] A 35g steel ball is used for dropping. The ball-dropping jig is made of stainless steel, with a smooth surface and no scratches, dents, bumps or other surface defects. The steel ball is dropped from a height of 5cm at the center of the hole-dropping area. Each height is tested 5 times. After the test is completed, it is confirmed that the product appearance is not broken. The height is increased at intervals of 1cm until it breaks, and the height value before breaking is recorded.

[0050] The above method was used to perform a drop ball test on the TGV glass and the rollable glass of the present invention, and the results are shown in Table 2 below.

[0051] 3. Bending test of rollable glass filled with polymer material

[0052] As shown in Table 3 below, the fracture conditions of the bending zone of the rollable glass made by the method of the present invention and the traditional TGV glass after being bent 200,000 times at R1.0 are shown.

[0053] Table 1. Appearance test results

[0054]

[0055]

[0056] Note: "0" indicates no obvious film mark was observed; "1" indicates obvious film mark was observed.

[0057] Table 2. Ball drop test results

[0058]

[0059]

[0060] It can be seen from the results in Tables 1 and 2 above that the present invention greatly improves the ball drop strength of the winding area by filling the through hole with a polymer material having a refractive index consistent with that of the glass cover plate, thereby effectively solving the problem that the traditional windable glass has weak ball drop strength and cannot be used for the first surface of human-machine contact.

[0061] Table 3. Bending test results

[0062]

[0063] Note: “ / ” indicates that the sample did not break after being bent 200,000 times; “*” indicates that the sample broke after being bent 200,000 times.

[0064] It can be seen from the above table that the bending performance of the winding area of ​​the windable glass produced according to the method of the present invention is not significantly different from that of the traditional TGV glass, and the bending performance is not reduced.

[0065] In summary, the present invention reduces the diameter of the through holes in the folding area of ​​the supporting structure and increases the number of through holes, thereby dispersing the deformation in the bending process onto more micro-through holes. Under the premise of ensuring the ball drop strength and bending performance, the deformation of a single through hole is reduced, and the transfer of the through hole morphology to the folding display screen to produce film marks can be effectively avoided during the bending process, thereby affecting the user experience of the folding display screen product.

[0066] It should be understood that the above description of the preferred embodiment is relatively detailed and cannot be regarded as limiting the scope of patent protection of the present invention. Under the enlightenment of the present invention, ordinary technicians in this field can also make substitutions or modifications without departing from the scope of protection of the claims of the present invention, which all fall within the scope of protection of the present invention. The scope of protection requested for the present invention shall be based on the attached claims.

Claims

1. A method for making rollable glass, characterized in that: The following steps are involved: Step 1: Select glass of corresponding thickness according to the actual size of the product; Step 2, clean the glass surface to be processed; Step 3, using a half-cut etching process to groove and half-cut the entire glass processing surface; Step 4, filling the polymer material into the groove on the glass surface after the groove is half-broken until the groove is filled; Step 5: Curing the surface of the glass filled with the polymer material to obtain a rollable glass.

2. The method for manufacturing a rollable glass according to claim 1, characterized in that: In step 1, glass of corresponding thickness is selected, and the thickness of the selected glass is 0.1~0.6mm.

3. The method for manufacturing a rollable glass according to claim 1, characterized in that: The width of the groove is 0.02-5 mm; the minimum distance from the bottom of the groove to the unetched glass surface after the groove is half-broken is 10-100 μm.

4. The method for manufacturing a rollable glass according to claim 1, characterized in that: In step 3, the entire glass processing surface is grooved and half-cut by using a half-cut etching process, and the cross-sectional shape of the grooved and half-cut is a comb-shaped, wedge-shaped, or arc-shaped groove or one or more groove shapes arranged in a certain pattern.

5. The method for manufacturing a rollable glass according to claim 1, characterized in that: In step 4, the polymer material is filled into the groove on the half-cut glass surface until the groove is filled. When the rollable glass is used as an OLED substrate / Micro LED mass transfer substrate, the material of the polymer material is one or two of acrylic polymers, silicone resins, epoxy resins, or polyurethane resins, and the solid content of the polymer material is 100%.

6. The method for manufacturing a rollable glass according to claim 1, characterized in that: In step 5, the glass surface filled with the polymer material is cured by one or two of heat curing, moisture curing or UV curing. The elongation at break after curing is greater than 10%, and R1.0 is bent 200,000 times @ -20℃ & 60℃ / 90% & 70℃ without breaking.

7. The method for manufacturing a rollable glass according to claim 1, characterized in that: When the rollable glass is used as a glass cover plate, the refractive index after the polymer material is filled and solidified is 1.49-1.53; the light transmittance is greater than 90% and the haze is less than 0.5%.

8. A use of the rollable glass as claimed in claims 1 to 7, characterized in that: The rollable glass is used as a glass cover.

9. A use of the rollable glass as claimed in claims 1 to 7, characterized in that: The rollable glass is used as an OLED substrate / Micro LED mass transfer carrier substrate.

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