Preparation method of glass surface texture, glass with texture and application

Abstract

The present invention provides a preparation method of glass surface texture, glass with texture and application, and relates to the technical field of glass processing. The preparation method comprises the following steps: coating a first UV glue on the surface of a glass substrate to form a first UV glue layer, coating a second UV glue on the surface of a release film, covering a first mold with a texture pattern on the release film, subjecting the release film to a wire drawing treatment and a pre-curing treatment I to form a second UV glue layer with a texture pattern, then removing the release film, covering the first mold on the glass substrate, and laminating the second UV glue layer with the first UV glue layer, removing the first mold, and photocuring the first mold to obtain a glass with texture; the texture obtained by the preparation method has good strength and friction resistance, meets various reliability requirements of the glass surface, makes the glass surface have a good feel, and can also produce various light and shadow effects, and the texture effect has extremely high fineness, and multiple texture effects can be superimposed for application.

Description

Technical Field

[0001] The invention relates to the technical field of glass processing, and in particular to a method for preparing glass surface texture, glass with texture and application. Background Art

[0002] Currently, the production of the outer surface texture effect of the back cover of mobile phones on the market mainly adopts chemical AG, physical sandblasting or yellow light technology.

[0003] Specifically, chemical AG is a process method in which the entire outer surface of the glass product is corroded by a frosting liquid to form a matte rough surface. The HF generated in this process will seriously endanger human health, and will also produce a large amount of waste gas, wastewater, solid waste, etc., which are difficult to handle, and the environmental pressure is large. The surface effect formed is relatively simple and selective to the glass material. Physical sandblasting is a processing and decoration method that sprays fine quartz sand or corundum on the surface of glass products to form patterns and matte rough surfaces. The main drawback of this method is that it has high energy consumption, produces a large amount of wastewater and solid waste, and the surface effect is simple and difficult to change. The yellow light process mainly uses a photoresist ink to spray on the glass surface, uses a UV light source to irradiate the light on the glass surface through a mask, and then washes the uncured part with a developer, and then chemically etches the uncovered ink area with an acid (such as HF), and removes the remaining ink with a strong alkali stripping solution, and finally the fine texture appears on the glass surface. In this process, a large amount of optical ink and chemical stripping solution are used, and HF etching is required. The process is complicated and costly, and it also has an adverse impact on the environment. The wire drawing process mainly uses UV glue on the surface of the film to create a texture effect on the film surface through the wire drawing process, and then the glass and the film are bonded together to achieve the texture on the cover. This process is simple, but it is mostly for small-sized products (such as cameras) that do not require high strength and hardness. In addition, due to the presence of the film, the hardness of the wire drawing texture layer is not enough, and the wire drawing texture layer can only be used as the back side, so the front of the glass has no feel and the glossiness is not enough.

[0004] In view of this, the present invention is proposed to solve at least one of the above technical problems. Summary of the invention

[0005] The first object of the present invention is to provide a method for preparing glass surface texture to alleviate the above technical problems existing in the prior art.

[0006] A second object of the present invention is to provide a glass having a texture.

[0007] The third object of the present invention is to provide a method for preparing the above-mentioned glass surface texture or application of glass with texture.

[0008] In order to achieve the above object, the technical solution of the present invention is as follows:

[0009] The present invention provides a method for preparing glass surface texture, comprising the following steps:

[0010] (a) providing a glass substrate, a release film and a first mold having a texture pattern on its surface;

[0011] (b) coating a first UV glue on a surface of the glass substrate to form a first UV glue layer;

[0012] (c) coating a second UV glue on the surface of the release film, and then covering the first mold on the release film, and then performing a wire drawing process and a pre-curing process I on the release film, so that the second UV glue transfers the texture pattern on the surface of the first mold to form a second UV glue layer with a texture pattern;

[0013] (d) removing the release film, covering the first mold on the glass substrate, and laminating the second UV glue layer on the surface of the first mold with the first UV glue layer on the surface of the glass substrate;

[0014] (e) removing the first mold, and photocuring the first UV glue layer and the second UV glue layer on the surface of the glass substrate to obtain a glass with a texture.

[0015] Further, based on the above technical solution of the present invention, in step (a), the first mold having a texture pattern on the surface is prepared by subjecting the polymer film to wire drawing;

[0016] Preferably, the polymer film includes a PET film and / or a TPU film.

[0017] Preferably, in step (a), the surface finish grade of the glass substrate is ≥ grade 7. Preferably, in step (a), the glass substrate is a strengthened glass substrate.

[0018] Further, on the basis of the above technical solution of the present invention, taking the mass fraction of the first UV glue as 100%, the first UV glue includes the following components in mass fractions:

[0019] Resin 78%-88%, diphenylphosphine oxide 3-5%, fumed silica 10-15% and silica microspheres 0.5-1%.

[0020] Preferably, the resin includes at least one of UV resin, epoxy resin and acrylic resin.

[0021] Preferably, the acrylic resin includes tripropylene glycol diacrylate and / or 1,6-hexanediol diacrylate.

[0022] Taking the mass fraction of the first UV glue as 100%, the first UV glue includes the following components in mass fractions:

[0023] Tripropylene glycol diacrylate 70-78%, 1,6-hexanediol diacrylate 8-10%, diphenylphosphine oxide 3-5%, fumed silica 10-15% and silica microspheres 0.5-1%;

[0024] Preferably, taking the mass fraction of the second UV glue as 100%, the second UV glue includes the following components in mass fractions:

[0025] Tripropylene glycol diacrylate 60-65%, 1,6-hexanediol diacrylate 25-32%, diphenylphosphine oxide 3-5% and butyl acetate 5-10%.

[0026] Further, on the basis of the above technical solution of the present invention, taking the mass fraction of the first UV glue as 100%, the first UV glue includes the following components in mass fractions:

[0027] Modified epoxy resin 30-45%, butyl acetate 45-65% and 3-(isobutylene acyloxy)propyltrimethoxysilane 4-10%;

[0028] Preferably, taking the mass fraction of the second UV glue as 100%, the second UV glue includes the following components in mass fractions:

[0029] Acrylate polymer 42-61%, polydipentaerythritol hexaacrylate 2-7%, butyl acetate 35-46%, 1-hydroxycyclohexyl phenyl ketone 1-3% and 3-(isomethacryloyloxy)propyltrimethoxysilane 1-3%;

[0030] Preferably, the CAS number of the acrylate polymer is 30698-92-1.

[0031] Further, based on the above technical solution of the present invention, in step (b), the coating method of the first UV glue includes spraying or silk-screen printing;

[0032] Preferably, in step (b), the thickness of the first UV glue layer is 8-12 μm;

[0033] Preferably, in step (b), before applying the first UV glue, the step further includes providing a protective film on the surface of the glass substrate, wherein the protective film is located on the surface of the glass substrate away from the surface to be coated with the first UV glue.

[0034] Further, based on the above technical solution of the present invention, in step (c), the speed of the wire drawing process is 30-40 mm / s;

[0035] Preferably, the UV energy of the pre-curing treatment I is 600-800mJ / cm²;

[0036] Preferably, the thickness of the second UV glue layer is 30-40 μm.

[0037] Further, based on the above technical solution of the present invention, in step (d), the method of bonding the second UV glue layer on the surface of the first mold to the first UV glue layer on the surface of the glass substrate includes: pressing and pre-curing treatment II;

[0038] Preferably, the pressing pressure is 20-30Mpa, and the pressing time is 15-25min;

[0039] Preferably, the UV energy of the pre-curing treatment II is 80-100 mJ / cm².

[0040] Furthermore, based on the above technical solution of the present invention, in step (e), the UV energy of the photocuring is 2000-3000mJ / cm².

[0041] The present invention also provides a glass with texture, which is prepared by the above-mentioned method for preparing the glass surface texture.

[0042] The present invention also provides a method for preparing the above-mentioned glass surface texture or the use of the glass with texture in preparing electronic products.

[0043] Compared with the prior art, the technical solution of the present invention has the following technical effects:

[0044] (1) The present invention provides a method for preparing a glass surface texture, comprising the steps of coating a first UV glue on the surface of a glass substrate to form a first UV glue layer, coating a second UV glue on the surface of a release film, covering a first mold having a texture pattern on the release film, subjecting the release film to a wire drawing treatment and a pre-curing treatment I to form a second UV glue layer having a texture pattern, then removing the release film, covering the first mold on the glass substrate, and laminating the second UV glue layer on the surface of the first mold with the first UV glue layer on the surface of the glass substrate, then removing the first mold, and light-curing the UV glue layer 1 and the UV glue layer 2 on the surface of the glass substrate to obtain a glass surface texture. Textured glass; the texture obtained by the preparation method has good strength and friction resistance, can meet various reliability requirements of the glass surface, can make the glass surface have a good feel, and can also produce various light and shadow effects, including but not limited to AG, yellow light, brushed and other texture effects, and the texture effect has extremely high fineness (<5μm), and multiple texture effects can be superimposed and applied, thereby improving the diversity of products; in addition, the preparation method is simple in process, low in cost, does not require HF participation in the entire process, is a kind of additive manufacturing, will not generate environmental problems such as waste gas, wastewater, solid waste, will not affect product strength, and defective products are easy to rework.

[0045] (2) The present invention also provides glass with texture, which is prepared by the above-mentioned method for preparing glass surface texture. In view of the advantages of the above-mentioned preparation method, a variety of three-dimensional texture effects are produced on the glass surface, and the texture effect has good hardness and friction resistance, meeting various reliability requirements of the glass surface.

[0046] (3) The present invention also provides a method for preparing glass surface texture or an application of the above-mentioned glass with texture. In view of the advantages of the above-mentioned preparation method or glass with texture, it has good application prospects in the preparation of electronic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 This is a simplified structural diagram of the release film and the first mold in Example 1 of the present invention;

[0049] Figure 2 This is a simplified structural diagram of the first mold and the glass substrate in Example 1 of the present invention;

[0050] Figure 3is a simplified structural diagram of the glass with texture in Example 1 of the present invention;

[0051] Figure 4 This is a physical picture of the glass with texture according to Example 1 of the present invention;

[0052] Figure 5 This is a physical picture of the glass with texture according to Example 2 of the present invention;

[0053] Figure 6 This is a 3D structural diagram of the textured glass in Example 1 of the present invention.

[0054] Icon: 10-glass substrate; 20-protective film; 30-first UV glue layer; 40-release film; 50-first mold; 60-second UV glue layer. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0056] According to a first aspect of the present invention, there is provided a method for preparing a glass surface texture, comprising the following steps:

[0057] (a) providing a glass substrate, a release film and a first mold having a texture pattern on its surface;

[0058] (b) coating a first UV glue on a surface of the glass substrate to form a first UV glue layer;

[0059] (c) coating a second UV glue on the surface of the release film, and then covering the first mold on the release film, and then performing a wire drawing process and a pre-curing process I on the release film, so that the second UV glue transfers the texture pattern on the surface of the first mold to form a second UV glue layer with a texture pattern;

[0060] (d) removing the release film, covering the first mold on the glass substrate, and laminating the second UV glue layer on the surface of the first mold with the first UV glue layer on the surface of the glass substrate;

[0061] (e) removing the first mold, and photocuring the first UV glue layer and the second UV glue layer on the surface of the glass substrate to obtain a glass with a texture.

[0062] Specifically, in step (a), the first mold with a texture pattern on the surface is mainly used to provide the texture pattern. A conventional hard plastic material (such as acrylic) can be used as the wire drawing mold, or a polymer film with a texture pattern can be used as the wire drawing mold.

[0063] In the present invention, the first UV glue layer formed by the first UV glue can generate a certain bonding force with the glass substrate, and achieve a close combination with the glass substrate. The second UV glue layer formed by the second UV glue has a certain texture pattern, and can also ensure a certain hardness. It should be noted that between the first UV glue and the second UV glue, the curing energy of the second UV glue cannot be too high. Too high will cause the second UV glue to be completely cured, resulting in the second glue being inactive and unable to produce adhesion with the first UV. The curing energy of the second UV glue is slightly lower, so as to ensure that the first UV glue layer and the second UV glue layer can achieve good compounding (bonding). After the first UV glue layer and the second UV glue layer are compounded (bonded), one or more fine texture effects can be achieved on the surface of the glass substrate, which can make the surface of the glass substrate have a good feel, and can also produce various light and shadow effects (including but not limited to ordinary AG, flash sand and other various textures).

[0064] The present invention provides a method for preparing a glass surface texture, which comprises the following steps: coating a first UV glue on the surface of a glass substrate to form a first UV glue layer, coating a second UV glue on the surface of a release film, covering a first mold with a texture pattern on the release film, performing a wire drawing process and a pre-curing process on the release film to form a second UV glue layer with a texture pattern, then removing the release film, covering the first mold on the glass substrate, and laminating the second UV glue layer on the surface of the first mold with the first UV glue layer on the surface of the glass substrate, then removing the first mold, and performing photocuring on the first UV glue layer and the second UV glue layer on the surface of the glass substrate to obtain a glass surface texture. The texture obtained by the preparation method has good strength and friction resistance, can meet various reliability requirements of the glass surface, can make the glass surface have a good feel, and can also produce various light and shadow effects (including but not limited to AG, yellow light, brushed and other texture effects, and the texture effect has extremely high fineness (<5μm), and multiple texture effects can be superimposed and applied, thereby improving the diversity of products; in addition, the preparation method has simple process, low cost, and does not require HF participation throughout the process. It is a kind of additive manufacturing, and will not generate environmental problems such as waste gas, waste water, and solid waste, will not affect product strength, and defective products are easy to rework.

[0065] As an optional embodiment of the present invention, in step (a), the glass substrate is a strengthened glass substrate.

[0066] The preparation of the above texture on the surface of the strengthened glass substrate can ensure that the glass is not damaged.

[0067] The method of forming the first mold having a texture pattern on the surface can be further optimized. As an optional embodiment of the present invention, in step (a), the first mold having a texture pattern on the surface is obtained by subjecting a polymer film to wire drawing.

[0068] Usually, a large polymer film is subjected to wire drawing and then cut to obtain multiple first molds with texture patterns on the surface. One first mold with a texture pattern on the surface corresponds to one glass substrate, and multiple first molds correspond to multiple glass substrates. Therefore, using a polymer film as a first mold can realize batch processing of glass substrates. In addition, the polymer film can be bent, so it can be used to process curved glass, further expanding the scope of application. The polymer film here is typical but not limited to PET film or TPU film.

[0069] The composition of the first UV glue is further optimized.

[0070] As an optional embodiment of the present invention, taking the mass fraction of the first UV glue as 100%, the first UV glue includes the following components in mass fractions:

[0071] Resin 78%-88%, diphenylphosphine oxide 3-5%, fumed silica 10-15% and silica microspheres 0.5-1%.

[0072] Preferably, the resin includes at least one of UV resin, epoxy resin and acrylic resin.

[0073] Preferably, the acrylic resin includes tripropylene glycol diacrylate and / or 1,6-hexanediol diacrylate.

[0074] Taking the mass fraction of the first UV glue as 100%, the first UV glue comprises the following components in mass fractions: 70-78% of tripropylene glycol diacrylate, 8-10% of 1,6-hexanediol diacrylate, 3-5% of diphenylphosphine oxide, 10-15% of fumed silica and 0.5-1% of silica microspheres;

[0075] In the first UV glue, tripropylene glycol diacrylate is mainly used as UV resin, and its typical but non-limiting mass fraction includes 70%, 72%, 74%, 75%, 76% or 78%; 1,6-hexanediol diacrylate is mainly used as UV resin monomer, and its typical but non-limiting mass fraction includes 8%, 8.5%, 9%, 9.5%, 9.8% or 10%; diphenylphosphine oxide is mainly used as photoinitiator, and its typical but non-limiting mass fraction includes 3%, 3.5%, 3.8%, 4%, 4.5% or 5%; fumed silica and silica microspheres are mainly used as fillers, and the typical but non-limiting mass fraction of fumed silica includes 10%, 11%, 12%, 13%, 14% or 15%, and the typical but non-limiting mass fraction of silica microspheres includes 0.5%, 0.6%, 0.7%, 0.8%, 0.9% or 1.0%.

[0076] Since UV resin and UV resin monomer are polyhydroxyl functional resins, the hydroxyl functional groups in the resin can combine with the silicon hydroxyl groups on the surface of the glass substrate to improve the adhesion between the resin and the surface of the glass substrate. Silicon dioxide can effectively improve the strength of the resin, ensuring that after the resin is cured and formed, the glass will not produce stress whitening and brittle fracture when it is bent by external force. Therefore, the first UV glue has better adhesion, strength and weather resistance than conventional UV glue. The fumed silica and silica microspheres in the first UV glue can effectively improve the strength of the resin, ensuring that after the resin is cured and formed, the glue bonded to the glass surface will not produce stress whitening and brittle fracture when the glass is bent by external force. At the same time, after the fumed silica and silica microspheres are filled in the first UV glue, the transmittance of the glue decreases, and a white glue layer is formed on the glass surface after curing, which improves the texture display effect of the second UV glue layer. The first UV glue has good bonding performance with the surface of the glass substrate, and the toughness is good after the glue is cured.

[0077] In order to achieve better coordination with the first UV glue mentioned above, the composition of the second UV glue is further optimized.

[0078] As an optional embodiment of the present invention, taking the mass fraction of the second UV glue as 100%, the second UV glue includes the following components in mass fractions:

[0079] Tripropylene glycol diacrylate 60-65%, 1,6-hexanediol diacrylate 25-32%, diphenylphosphine oxide 3-5% and butyl acetate 5-10%.

[0080] In the second UV glue, tripropylene glycol diacrylate is mainly used as a UV resin, and its typical but non-limiting mass fraction includes 60%, 61%, 62%, 63%, 64% or 65%; 1,6-hexanediol diacrylate is mainly used as a UV resin monomer, and its typical but non-limiting mass fraction includes 25%, 26%, 27%, 28%, 29%, 30%, 31% or 32%; diphenylphosphine oxide is mainly used as a photoinitiator, and its typical but non-limiting mass fraction includes 3%, 3.5%, 3.8%, 4%, 4.5% or 5%; butyl acetate is mainly used as a diluent, and its typical but non-limiting mass fraction includes 5%, 6%, 7%, 8%, 9% or 10%.

[0081] Since UV resin and UV resin monomer are both low molecular chain bifunctional (acrylate) molecules, that is, each resin molecule monomer contains two functional groups participating in the UV curing reaction, the UV glue is easy to form a network cross-linked polymer after final curing, rather than a nonlinear long-chain polymer, and has higher surface hardness and strength than conventional OCA glue (methacrylate) monofunctional molecular glue, so the UV glue may be used to form a wear-resistant and scratch-resistant texture layer on the outside of the glass. Therefore, the second UV glue has high viscosity, higher surface hardness and strength after the glue is cured, and provides better weather resistance and aging resistance for the second glue layer.

[0082] In addition, the first UV glue and the second UV glue may also have compositions different from those described above.

[0083] As an optional embodiment of the present invention, taking the mass fraction of the first UV glue as 100%, the first UV glue includes the following components in mass fractions:

[0084] Modified epoxy resin 30-45%, butyl acetate 45-65% and 3-(isobutylene acyloxy)propyltrimethoxysilane 4-10%;

[0085] Typical but non-limiting mass fractions of the modified epoxy resin include 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44% or 45%; typical but non-limiting mass fractions of butyl acetate include 45%, 48%, 50%, 52%, 54%, 55%, 58%, 60%, 62%, 64% or 65%; typical but non-limiting mass fractions of 3-(isomethacryloyloxy)propyltrimethoxysilane include 4%, 5%, 6%, 7%, 8%, 9% or 10%.

[0086] Preferably, the CAS number of the modified epoxy resin is 38891-59-7.

[0087] The modified epoxy resin is a curing agent component in the first UV glue, butyl acetate is a diluent in the glue component to improve the processing performance of the glue, and 3-(isobutyleneoxy)propyltrimethoxysilane is a coupling agent component in the glue. The combination of the three can effectively improve the bonding performance between the glue and the glass surface substrate.

[0088] In order to achieve better coordination with the first UV glue mentioned above, the composition of the second UV glue is further optimized.

[0089] As an optional embodiment of the present invention, taking the mass fraction of the second UV glue as 100%, the second UV glue includes the following components in mass fractions:

[0090] Acrylate polymer 42-61%, polydipentaerythritol hexaacrylate 2-7%, butyl acetate 35-46%, 1-hydroxycyclohexyl phenyl ketone 1-3% and 3-(isobutyleneoxy)propyltrimethoxysilane 1-3%.

[0091] Typical but non-limiting mass fractions of acrylate polymers include 42%, 44%, 45%, 48%, 50%, 52%, 54%, 55%, 58%, 60% or 61%; typical but non-limiting mass fractions of polydipentaerythritol hexaacrylate include 2%, 3%, 4%, 5%, 6% or 7%; typical but non-limiting mass fractions of butyl acetate include 35%, 36%, 38%, 40%, 42%, 44%, 45% or 46%; typical but non-limiting mass fractions of 1-hydroxycyclohexylphenyl ketone include 1%, 1.5%, 2%, 2.5% or 3%; typical but non-limiting mass fractions of 3-(isomethacryloyloxy)propyltrimethoxysilane include 1%, 1.5%, 2%, 2.5% or 3%.

[0092] Preferably, the CAS number of the acrylate polymer is 30698-92-1.

[0093] The first UV glue and the second UV glue mentioned above both contain acrylate functional groups. After the second UV glue is cured, there are still active acrylate functional groups that have not been completely reacted on the surface, which can continue to cure with the functional groups of the first UV glue, so it has good matching. The above-mentioned second UV glue is limited in specific composition to meet various reliability requirements of glass (dry 100 grids, wet 100 grids, strong stripping, high temperature and high humidity, UV aging, wear resistance, hardness, etc.). By limiting the specific composition of the first UV glue, it has good adhesion to the glass and can also have good matching with the second UV glue.

[0094] As an optional embodiment of the present invention, in step (b), the coating method of the first UV glue includes spraying or silk-screen printing.

[0095] As an optional embodiment of the present invention, in step (b), after the first UV glue is applied, a curing step is also included to form a first UV glue layer.

[0096] Preferably, the curing temperature is 80-90°C, and the curing time is 5-10 min. Typical but non-limiting curing temperatures are 80°C, 82°C, 85°C, 88°C or 90°C, and typical but non-limiting curing times are 5 min, 8 min or 10 min.

[0097] As an optional embodiment of the present invention, in step (b), the thickness of the first UV glue layer is 8-12 μm. If the thickness exceeds 12 μm, the hardness of the glue will decrease.

[0098] As an optional embodiment of the present invention, in step (b), before applying the first UV glue, the method further includes providing a protective film on the surface of the glass substrate, wherein the protective film is located on the surface of the glass substrate away from the surface to be coated with the first UV glue.

[0099] The setting of the protective film helps to prevent glue overflow from the back during spraying.

[0100] As an optional embodiment of the present invention, in step (c), the wire drawing speed is 30-40 mm / s.

[0101] As an optional embodiment of the present invention, the UV energy of the pre-curing treatment I is 600-800 mJ / cm².

[0102] The thickness of the second UV glue layer is related to the depth of the texture pattern. The deeper the texture depth, the greater the required glue thickness. As an optional embodiment of the present invention, the thickness of the second UV glue layer is 30-40 μm.

[0103] As an optional embodiment of the present invention, in step (d), the method of bonding the second UV glue layer on the surface of the first mold to the first UV glue layer on the surface of the glass substrate includes: pressing and pre-curing treatment II.

[0104] The specific method of pressing is not limited. For example, the first mold can be covered on the glass substrate first, and then put into a vacuum bag for packaging. After packaging, it is put into a hydraulic press for pressing.

[0105] As an optional embodiment of the present invention, the pressing pressure is 20-30 MPa, and the pressing time is 20 min. Typical but non-limiting pressing pressures are 20 MPa, 22 MPa, 24 MPa, 25 MPa, 28 MPa or 30 MPa. Typical but non-limiting pressing time is 20 min.

[0106] As an optional embodiment of the present invention, the UV energy of the pre-curing treatment II is 80-100 mJ / cm².

[0107] After the pressing, a pre-curing treatment II is performed, so that the second UV glue layer on the surface of the first mold and the first UV glue layer on the surface of the glass substrate have a certain bonding force.

[0108] As an optional embodiment of the present invention, in step (e), the UV energy of photocuring is 2000-3000 mJ / cm².

[0109] Typical but non-limiting UV energies for photocuring include 2000 mJ / cm², 2200 mJ / cm², 2400 mJ / cm², 2500 mJ / cm², 2600 mJ / cm², 2800 mJ / cm², or 3000 mJ / cm².

[0110] According to a second aspect of the present invention, there is also provided a glass with a texture, which is prepared by the above-mentioned method for preparing a glass surface texture.

[0111] In view of the advantages of the above-mentioned method for preparing glass surface texture, a variety of three-dimensional textures are produced on the surface of the glass substrate, and the texture effect has good hardness and friction resistance, meeting various reliability requirements of the glass surface.

[0112] According to a third aspect of the present invention, a method for preparing the above-mentioned glass surface texture or use of the glass with texture in preparing electronic products is also provided.

[0113] There are many types of electronic products, including but not limited to mobile phones, e-books, car-mounted or computers.

[0114] In view of the advantages of the above-mentioned method for preparing glass surface texture or glass with texture, it has good application prospects in the preparation of electronic products.

[0115] The present invention will be further described below in conjunction with specific embodiments and comparative examples.

[0116] Example 1

[0117] This embodiment provides a method for preparing a glass surface texture, comprising the following steps:

[0118] (a) providing a glass substrate 10, a release film 40 and a first mold 50 having a texture pattern on its surface;

[0119] The glass substrate 10 is a strengthened glass substrate. After the glass substrate 10 is cleaned, a protective film 20 is covered on the back side (i.e., the surface away from the first UV glue layer 30);

[0120] The method for preparing the first mold having a texture pattern on the surface comprises: using a wire drawing machine to prepare the texture required for wire drawing on a PET film.

[0121] (b) coating a first UV glue on one surface of the glass substrate 10 and curing it at 80-90° C. for 5 min to form a first UV glue layer 30 with a thickness of 10 μm;

[0122] Taking the mass fraction of the first UV glue as 100%, the first UV glue includes the following components in mass fractions: 75% of tripropylene glycol diacrylate, 9% of 1,6-hexanediol diacrylate, 4% of diphenylphosphine oxide, 11.5% of fumed silica and 0.5% of silica microspheres;

[0123] (c) coating the second UV glue on the surface of the release film 40, and then covering the first mold 50 on the release film 40, and then performing a wire drawing process and a pre-curing process I on the release film 40, so that the second UV glue transfers the texture pattern on the surface of the first mold to form a second UV glue layer 60 having a texture pattern, as shown in the following example. Figure 1 As shown;

[0124] Then the entire film formed by the first mold 50 and the release film 40 is cut into a single first mold film 0.4-0.8 mm larger than the outer shape of the glass substrate;

[0125] Taking the mass fraction of the second UV glue as 100%, the second UV glue includes the following components in mass fractions: 62% of tripropylene glycol diacrylate, 30% of 1,6-hexanediol diacrylate, 3% of diphenylphosphine oxide and 5% of butyl acetate.

[0126] The drawing speed of the wire drawing process is 20 mm / s.

[0127] The UV energy of pre-curing treatment I is 600mJ / cm².

[0128] The thickness of the UV glue layer is 32 μm.

[0129] (d) removing the release film 40 and covering the first mold 50 film on the glass substrate 10, as shown in the following example: Figure 2 As shown, it is then placed in a vacuum bag for packaging, and after packaging, it is placed in a hydraulic press for pressing, and then subjected to a pre-curing treatment II, so that the second UV glue layer 60 on the surface of the first mold is attached to the first UV glue layer 30 on the surface of the glass substrate;

[0130] The pressing pressure is 25 MPa and the pressing time is 20 min.

[0131] The UV energy of pre-curing treatment II is 90J / cm².

[0132] (e) Separating the first mold 50 film from the glass substrate 10, using alcohol to clean the second UV glue layer 60 that extends beyond the edge of the glass substrate, tearing off the protective film 20 on the back of the glass substrate 10, placing the cleaned glass substrate in a fixed baking tray, and light-curing the first UV glue layer 30 and the second UV glue layer 60 on the surface of the glass substrate, the UV energy of the light curing is 2000mJ / cm², and obtaining a glass with a texture, as shown in detail. Figure 3 As shown, the corresponding 3D structure diagram is as follows Figure 6 shown. Figure 4 A physical picture of the textured glass of this embodiment is shown.

[0133] Example 2

[0134] The present invention provides a method for preparing a glass surface texture, wherein the first mold (PET film) having a texture pattern on the surface is replaced by a hard mold (made of acrylic) having a texture pattern on the surface, that is, the hard mold is used as a wire drawing mold, and the remaining steps are the same as those in Example 1. Figure 5 A physical picture of the textured glass of this embodiment is shown.

[0135] Example 3

[0136] The present invention provides a method for preparing a glass surface texture, which is the same as Example 1 except that the composition of the first UV glue in step (b) is adjusted (details are as follows).

[0137] Taking the mass fraction of the first UV glue as 100%, the first UV glue includes the following components in mass fractions: 76% of tripropylene glycol diacrylate, 8% of 1,6-hexanediol diacrylate, 5% of diphenylphosphine oxide, 10% of fumed silica and 1% of silica microspheres.

[0138] Example 4

[0139] The present invention provides a method for preparing a glass surface texture, which is the same as Example 1 except that the composition of the second UV glue in step (c) is adjusted (details are as follows).

[0140] Taking the mass fraction of the second UV glue as 100%, the second UV glue includes the following components in mass fractions: 63% of tripropylene glycol diacrylate, 28% of 1,6-hexanediol diacrylate, 4% of diphenylphosphine oxide and 5% of butyl acetate.

[0141] Example 5

[0142] This embodiment provides a method for preparing a glass surface texture, comprising the following steps:

[0143] (a) providing a glass substrate, a release film and a first mold having a texture pattern on its surface;

[0144] The glass substrate is a strengthened glass substrate. After the glass substrate is cleaned, a protective film is covered on the back side (i.e., the surface away from the first UV glue layer);

[0145] The method for preparing the first mold having a texture pattern on the surface comprises: using a wire drawing machine to prepare the texture required for wire drawing on a PET film.

[0146] (b) coating a first UV glue on one surface of the glass substrate and curing the first UV glue at 80° C. for 5 min to form a first UV glue layer with a thickness of 10 μm;

[0147] Taking the mass fraction of the first UV glue as 100%, the first UV glue includes the following components in mass fractions: 45% of modified epoxy resin, 50% of butyl acetate and 5% of 3-(isomethacryloyloxy)propyltrimethoxysilane; wherein the CAS number of the modified epoxy resin is 38891-59-7;

[0148] (c) coating a second UV glue on the surface of the release film, and then covering the first mold on the release film, and then performing a wire drawing process and a pre-curing process I on the release film, so that the second UV glue transfers the texture pattern on the surface of the first mold to form a second UV glue layer with a texture pattern;

[0149] Then the entire film formed by the first mold and the release film is cut to make a single first mold film 0.4-0.8 mm larger than the outer shape of the glass substrate;

[0150] Taking the mass fraction of the second UV glue as 100%, the second UV glue includes the following components in mass fractions: 50% of acrylate polymer, 5% of polydipentaerythritol hexaacrylate, 40% of butyl acetate, 2% of 1-hydroxycyclohexyl phenyl ketone and 3% of 3-(isobutyleneoxy)propyltrimethoxysilane.

[0151] The drawing speed of the wire drawing process is 30 mm / s;

[0152] The UV energy of pre-curing treatment I is 600mJ / cm²;

[0153] The thickness of the second UV glue layer is 30 μm.

[0154] (d) removing the release film, covering the first mold film on the glass substrate, and then putting it into a vacuum bag for packaging, and after packaging, putting it into a hydraulic press for pressing, and then performing pre-curing treatment II, so that the second UV glue layer on the surface of the first mold and the first UV glue layer on the surface of the glass substrate are bonded;

[0155] The pressing pressure is 25Mpa and the pressing time is 20min;

[0156] The UV energy of pre-curing treatment II is 90mJ / cm²;

[0157] (e) Separating the first mold film from the glass substrate, using alcohol to clean the second UV glue layer that extends beyond the edge of the glass substrate, tearing off the protective film on the back of the glass, placing the cleaned glass substrate in a fixed baking tray, and photocuring the first UV glue layer and the second UV glue layer on the surface of the glass substrate. The UV energy of the photocuring is 2000mJ / cm², thereby obtaining a textured glass.

[0158] Comparative Example 1

[0159] This comparative example provides a method for preparing a special texture of a glass substrate, comprising the following steps:

[0160] (a) providing a membrane and a glass substrate;

[0161] (b) The diaphragm includes a first surface and a second surface that are opposite to each other, glue is coated on the first surface of the diaphragm to form a glue layer with a thickness of 32 μm, and the glue layer is subjected to a wire drawing process;

[0162] Among them, the brand of glue is JH-8280-20, purchased from the manufacturer Jianhe Technology;

[0163] The grade JH-8280-20 glue includes the following components by mass fraction:

[0164] Acrylic fatty polyurethane 50%-70%, tetrahydrofurfuryl acrylate 5%-15%, 1,6-hexanediol diacrylate 5%-15%, N-vinyl pyrrolidone 10%-20%, 1-hydroxycyclohexyl phenyl ketone 2%-4%, (2,4,6-3-methylbenzoyl) diphenylphosphine oxide 1%-3%. The drawing speed of the drawing process is 30mm / s;

[0165] The UV energy of light curing is 80mJ / cm²;

[0166] (c) The film is bonded to a glass substrate through OCA, with the second surface of the film facing the glass substrate, to obtain a glass with a texture.

[0167] Comparative Example 2

[0168] This comparative example provides a method for preparing a special texture on a glass substrate, which is the same as comparative example 1 except that the glue in comparative example 1 is replaced by the first UV glue in embodiment 1.

[0169] Comparative Example 3

[0170] This comparative example provides a method for preparing a special texture on a glass substrate, which is the same as comparative example 1 except that the glue in comparative example 1 is replaced by the second UV glue in embodiment 1.

[0171] Comparative Example 4

[0172] This comparative example provides a method for preparing a special texture on a glass substrate, which is the same as that of Example 2 except that the first UV glue and the second UV glue in Example 2 are replaced by the glue in Comparative Example 1.

[0173] Comparative Example 5

[0174] This comparative example provides a method for preparing a special texture on a glass substrate, which is the same as Example 2 except that the first UV glue in Example 2 is replaced by the glue in Comparative Example 1, and the second UV glue in Example 2 is replaced by the first UV glue in Example 1.

[0175] Comparative Example 6

[0176] This comparative example provides a method for preparing a special texture on a glass substrate, which is the same as Example 2 except that the first UV glue in Example 2 is replaced by the glue in Comparative Example 1.

[0177] Comparative Example 7

[0178] This comparative example provides a method for preparing a special texture on a glass substrate, which is the same as Example 2 except that the first UV glue in Example 2 is replaced by the second UV glue in Example 1, and the second UV glue in Example 2 is replaced by the glue in Comparative Example 1.

[0179] Comparative Example 8

[0180] This comparative example provides a method for preparing a special texture on a glass substrate, which is the same as Example 2 except that the second UV glue in Example 2 is replaced by the glue in Comparative Example 1.

[0181] Comparative Example 9

[0182] This comparative example provides a method for preparing a special texture on a glass substrate, which is the same as Example 2 except that the second UV glue in Example 2 is replaced by the first UV glue.

[0183] In order to compare the technical effects of the embodiments and comparative examples, the following experimental examples are specially set up.

[0184] Experimental Example 1

[0185] The textured glasses prepared by the preparation methods of the embodiments and comparative examples were tested, and the specific results are shown in Table 1.

[0186] Hardness test method: Use Mitsubishi UNI test pencil, cut the pencil core into a 5MM cylinder and grind it on 400-grit sandpaper, then install it on a special pencil hardness tester (the load applied to the tip of the pencil is 1kg, and the angle between the pencil and the horizontal plane is 45 degrees). Push the pencil to slide forward about 1~2cm long, draw 3 times at different positions (once for each position), and then wipe off the pencil marks with an eraser.

[0187] Hardness determination basis:

[0188] (1) The outer surface of the glass battery cover is required to be scratch-free for 8H (pencil hardness is not required for those not coated with AF).

[0189] (2) No judgment is made for the first 1 mm of the scratch. If there is a scratch on one of the three lines, the hardness grade is used for judgment.

[0190] Friction resistance test method: Use RCA special paper tape with fixed weight (55g, 175g, 275g) to apply to the product surface. Use a fixed diameter roller and a fixed speed motor with a specific counter.

[0191] The test conditions are as follows:

[0192] Test standard: ASTM F2357-04;

[0193] Test load: Generally there are three types: 55g, 175g, and 275g;

[0194] Friction mode: divided into continuous and intermittent;

[0195] Test times: such as 150 laps, 200 laps, 300 laps;

[0196] Test rate: 10 cycles / min.

[0197] Friction resistance: No scratches on the surface after 150 consecutive rubbings with a load of 175g.

[0198] Table 1

[0199]

[0200] It can be seen from the data in Table 1 that, compared with the comparative example, the textured glass prepared by the preparation method of each embodiment of the present invention has a certain hardness and can maintain a relatively high friction resistance.

[0201] Specifically, in Comparative Example 1, a conventional preparation process is used to form a texture pattern on the surface of a glass substrate. Since a film is laminated to the glass substrate, the hardness of one side of the wire drawing layer (texture layer) will inevitably be lowered, resulting in low hardness. Since the hardness does not meet the requirements, the texture layer can only be formed on the back of the glass substrate, thereby reducing the glossiness effect of the front side of the glass substrate.

[0202] Comparative Examples 2 and 3 are control experiments of Comparative Example 1, and Comparative Examples 2 and 3 respectively use the first UV glue and the second UV glue in Example 1 of the present invention to replace the glue in Comparative Example 1. It can be seen from Table 1 that although the hardness is improved, the degree of improvement in hardness is limited due to the presence of the diaphragm.

[0203] Comparative Examples 4-8 are all comparative experiments of Example 2. From the data in Table 1, it can be seen that conventional glue on the market cannot form adhesion with the glass substrate, resulting in glue falling off, and cannot meet the requirements of the present invention for hardness and friction resistance.

[0204] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing glass surface texture, characterized in that: The following steps are involved: (a) providing a glass substrate, a release film and a first mold having a texture pattern on its surface; (b) coating a first UV glue on a surface of the glass substrate to form a first UV glue layer; (c) coating a second UV glue on the surface of the release film, and then covering the first mold on the release film, and then performing a wire drawing process and a pre-curing process I on the release film, so that the second UV glue transfers the texture pattern on the surface of the first mold to form a second UV glue layer with a texture pattern; (d) removing the release film, covering the first mold on the glass substrate, and laminating the second UV glue layer on the surface of the first mold with the first UV glue layer on the surface of the glass substrate; (e) removing the first mold, and light-curing the first UV glue layer and the second UV glue layer on the surface of the glass substrate to obtain a glass with a texture; Taking the mass fraction of the first UV glue as 100%, the first UV glue comprises the following components in mass fractions: 70-78% of tripropylene glycol diacrylate, 8-10% of 1,6-hexanediol diacrylate, 3-5% of diphenylphosphine oxide, 10-15% of fumed silica and 0.5-1% of silica microspheres; taking the mass fraction of the second UV glue as 100%, the second UV glue comprises the following components in mass fractions: 60-65% of tripropylene glycol diacrylate, 25-32% of 1,6-hexanediol diacrylate, 3-5% of diphenylphosphine oxide and 5-10% of butyl acetate; Or, based on the mass fraction of the first UV glue being 100%, the first UV glue comprises the following components in mass fractions: 30-45% of modified epoxy resin, 45-65% of butyl acetate and 4-10% of 3-(isomethacryloyloxy)propyltrimethoxysilane; Taking the mass fraction of the second UV glue as 100%, the second UV glue includes the following components in mass fractions: 42-61% of acrylate polymer, 2-7% of polydipentaerythritol hexaacrylate, 35-46% of butyl acetate, 1-3% of 1-hydroxycyclohexyl phenyl ketone and 1-3% of 3-(isobutyleneoxy)propyltrimethoxysilane.

2. The method for preparing glass surface texture according to claim 1, characterized in that: In step (a), the first mold having a texture pattern on the surface is prepared by subjecting a polymer film to wire drawing.

3. The method for preparing glass surface texture according to claim 1, characterized in that: In step (a), the glass substrate is a strengthened glass substrate.

4. The method for preparing glass surface texture according to claim 1, characterized in that: In step (a), the surface finish grade of the glass substrate is ≥ grade 7.

5. The method for preparing glass surface texture according to claim 1, characterized in that: In step (b), the coating method of the first UV glue includes spraying or silk-screen printing.

6. The method for preparing glass surface texture according to claim 1, characterized in that: In step (b), the thickness of the first UV glue layer is 8-12 μm.

7. The method for preparing glass surface texture according to claim 1, characterized in that: In step (b), before applying the first UV glue, a step of providing a protective film on the surface of the glass substrate is also included, wherein the protective film is located on the surface of the glass substrate away from the surface to be coated with the first UV glue.

8. The method for preparing glass surface texture according to claim 1, characterized in that: In step (c), the wire drawing process is performed at a speed of 30-40 mm / s.

9. The method for preparing glass surface texture according to claim 1, characterized in that: The UV energy of the pre-curing treatment I is 600-800mJ / cm².

10. The method for preparing glass surface texture according to claim 1, characterized in that: The thickness of the second UV glue layer is 30-40 μm.

11. The method for preparing glass surface texture according to claim 1, characterized in that: In step (d), the method of bonding the second UV glue layer on the surface of the first mold to the first UV glue layer on the surface of the glass substrate includes: pressing and pre-curing treatment II.

12. The method for preparing glass surface texture according to claim 11, characterized in that: The pressing pressure is 20-30 MPa, and the pressing time is 15-25 min.

13. The method for preparing glass surface texture according to claim 11, characterized in that: The UV energy of the pre-curing treatment II is 80-100 mJ / cm².

14. The method for preparing glass surface texture according to claim 1, characterized in that: In step (e), the UV energy of the photocuring is 2000-3000 mJ / cm².

15. A glass with texture, characterized in that: The glass surface texture is prepared by the method for preparing the glass surface texture according to any one of claims 1 to 14.

16. The method for preparing the glass surface texture according to any one of claims 1 to 14 or the use of the glass with texture according to claim 15 in preparing electronic products.

Images