CN115974422A - Preparation method of glass surface texture, glass with texture and application - Google Patents

Abstract

The invention provides a method for preparing glass surface texture, glass with texture and application thereof, and relates to the technical field of glass processing. The preparation method forms the first UV glue layer by coating the first UV glue on the surface of the glass substrate, coats the second UV glue on the surface of the release film, and covers the first mold with the texture pattern on the release film. , it is subjected to wire drawing treatment and pre-curing treatment I to form a second UV glue layer with a textured pattern, then remove the release film, cover the first mold on the glass substrate, and make the second UV glue layer and the first The UV glue layer is bonded, the first mold is removed, and it is cured by light to obtain textured glass; the texture prepared by this preparation method has good strength and friction resistance, which meets various reliability requirements of the glass surface and makes the glass The surface produces 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 and applied.

Description

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

technical field

The invention relates to the technical field of glass processing, in particular to a method for preparing glass surface textures, textured glass and applications.

Background technique

At present, the texture effect of the outer surface of the back cover of mobile phones on the market mainly adopts chemical AG, physical sandblasting or yellow light technology.

Specifically, chemical AG is a process in which the entire outer surface of a glass product is eroded by a frosting solution to form a matte surface. Wastes are difficult to deal with, the environmental pressure is high, and the surface effect formed is relatively simple, so it is selective for glass materials. 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 surfaces. The main disadvantages of this method are high energy consumption, large amount of waste water and solid waste, and single and difficult to change surface effect. 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 cleans the uncured part with a developer, and then uses an acid (such as HF) to remove the uncovered part. The ink area is chemically etched, and the remaining ink is deplated by a strong alkali deplating 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 at the same time, the process is complicated, the cost is high, and it also has adverse effects on the environment. The wire drawing process is mainly to use UV glue on the surface of the film, to make the texture effect on the film surface through the wire drawing process, and then to bond the glass and the film, so as to achieve the process of making the texture on the cover plate. This process is simple, but many It is for small-sized products (such as cameras) that do not require high strength and hardness, and due to the existence of the film, the hardness of the brushed texture layer is not enough, so the brushed texture layer can only be used as the back side, so the front of the glass has no feel and gloss Not enough.

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

Contents of the invention

The first object of the present invention is to provide a method for preparing glass surface texture, so as to alleviate the above-mentioned technical problems existing in the prior art.

The second object of the present invention is to provide a textured glass.

The third object of the present invention is to provide a method for preparing the above-mentioned glass surface texture or an application of the textured glass.

In order to achieve the above object, the technical scheme of the present invention is as follows:

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

(a) providing a glass substrate, a release film and a first mold with a textured pattern on its surface;

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

(c) Coat the second UV glue on the surface of the release film, then cover the first mold on the release film, and then perform drawing treatment and pre-curing treatment I to transfer the second UV glue to the first Texture patterns on the mold surface to form a second UV glue layer with texture patterns;

(d) remove the release film, cover the first mold on the glass substrate, and make the second UV glue layer on the surface of the first mold bond the first UV glue layer on the surface of the glass substrate;

(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 textured glass.

Further, on the basis of the above-mentioned technical solution of the present invention, in step (a), the first mold with a textured pattern on the surface is made by drawing the polymer film;

Preferably, the polymer film comprises a PET film and/or a TPU film.

Preferably, in step (a), the surface roughness grade of the glass substrate is ≥ grade 7. Preferably, in step (a), the glass substrate is a strengthened glass substrate.

Further, on the basis of the above-mentioned technical solution of the present invention, the first UV glue includes the following mass fractions of each component based on the mass fraction of the first UV glue as 100%:

Resin 78%-88%, diphenyl phosphorus oxide 3-5%, fumed silicon dioxide 10-15% and silicon dioxide microspheres 0.5-1%.

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

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

Taking the first UV glue mass fraction as 100%, the first UV glue includes the following components in mass fraction:

Tripropylene glycol diacrylate 70-78%, 1,6-hexanediol diacrylate 8-10%, diphenyl phosphorus oxide 3-5%, fumed silica 10-15% and silica micro Ball 0.5-1%;

Preferably, the second UV glue mass fraction is 100%, and the second UV glue comprises the following mass fractions of each component:

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

Further, on the basis of the above-mentioned technical solution of the present invention, the first UV glue includes the following mass fractions of each component based on the mass fraction of the first UV glue as 100%:

30-45% modified epoxy resin, 45-65% butyl acetate and 4-10% 3-(methacryloyloxy)propyltrimethoxysilane;

Preferably, the second UV glue mass fraction is 100%, and the second UV glue comprises the following mass fractions of each component:

Acrylate polymer 42-61%, polydipentaerythritol hexaacrylate 2-7%, butyl acetate 35-46%, 1-hydroxycyclohexyl phenyl ketone 1-3% and 3-(methacryloyloxy)propane Trimethoxysilane 1-3%;

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

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

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

Preferably, in step (b), before coating the first UV glue, also include the step of setting a protective film on the surface of the glass substrate, the protective film is located at the surface of the glass substrate away from the first UV glue to be coated. s surface.

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

Preferably, the UV energy of the pre-curing treatment I is 600-800mJ/cm ² ;

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

Further, on the basis of the above-mentioned technical solution of the present invention, in step (d), the way 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;

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

Preferably, the UV energy of the pre-curing treatment II is 80-100 mJ/cm ² .

Further, on the basis of the above technical solution of the present invention, in step (e), the UV energy of the photocuring is 2000-3000mJ/cm ² .

The present invention also provides a textured glass, which is prepared by the method for preparing the glass surface texture mentioned above.

The present invention also provides the method for preparing the above-mentioned glass surface texture or the application of the textured glass in the preparation of electronic products.

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

(1) The invention provides a kind of preparation method of glass surface texture, forms the first UV glue layer by coating the first UV glue on the surface of glass base material, coats the second UV glue on the release film surface, will have The first mold with texture pattern is covered on the release film, and it is subjected to drawing treatment and pre-curing treatment Ⅰ to form the second UV glue layer with texture pattern, and then the release film is removed, and the first mold is covered on the glass substrate. on the material, and make 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 fit together, then remove the first mold, and UV glue layer 1 and UV glue layer 2 on the surface of the glass substrate Carry out light curing to obtain textured glass; the texture obtained by this preparation method has good strength and friction resistance, which 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 a very high degree of fineness (<5μm), and multiple texture effects can be superimposed and applied, thereby enhancing the diversity of products; in addition , the preparation method is simple in process, low in cost, does not require HF to participate in the whole process, belongs to a kind of additive manufacturing, will not produce waste gas, waste water, solid waste and other environmental problems, will not affect product strength, and defective products are easy to rework.

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

(3) The present invention also provides a method for preparing glass surface texture or the application of the above-mentioned textured glass. In view of the advantages of the above-mentioned preparation method or the textured glass, it has a good application prospect in the preparation of electronic products.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Fig. 1 is a schematic structural diagram of a release film and a first mold in Example 1 of the present invention;

Fig. 2 is a schematic diagram of the structure of the first mold and the glass substrate in Example 1 of the present invention;

Fig. 3 is a schematic structural diagram of textured glass in Example 1 of the present invention;

Fig. 4 is the actual figure of the glass with texture in embodiment 1 of the present invention;

Fig. 5 is the actual figure of the glass with texture in embodiment 2 of the present invention;

Fig. 6 is a 3D structure diagram of the textured glass in Example 1 of the present invention.

Icons: 10-glass substrate; 20-protective film; 30-first UV glue layer; 40-release film; 50-first mold; 60-second UV glue layer.

Detailed ways

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 It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

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

(a) providing a glass substrate, a release film and a first mold with a textured pattern on its surface;

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

(c) Coat the second UV glue on the surface of the release film, then cover the first mold on the release film, and then perform drawing treatment and pre-curing treatment I to transfer the second UV glue to the first Texture patterns on the mold surface to form a second UV glue layer with texture patterns;

(d) remove the release film, cover the first mold on the glass substrate, and make the second UV glue layer on the surface of the first mold bond the first UV glue layer on the surface of the glass substrate;

(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 textured glass.

Specifically, in step (a), the first mold with a textured pattern on the surface is mainly used to provide a textured pattern, and a conventional hard plastic material (such as acrylic) can be used as a wire drawing mold, or a polymer film with a textured pattern can be used The sheet is used as a drawing die.

In the present invention, the first UV glue layer formed by the first UV glue can generate certain cohesive force with the glass substrate, so as to realize the 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 guarantee 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 should not be too high. If it is too high, the second UV glue will be completely cured, causing the second glue to be inactive and cannot be combined with the first UV glue. UV creates adhesion. 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 realize good compounding (bonding). After the first UV glue layer and the second UV glue layer are combined (laminated), one or more fine texture effects can be realized on the surface of the glass substrate, which can make the surface of the glass substrate produce a good feel, and at the same time can produce various light and shadow Effects (including but not limited to normal AG, glitter sand and various other textures).

The invention provides a method for preparing glass surface textures. The first UV glue layer is formed by coating the first UV glue on the surface of the glass substrate, and the second UV glue is coated on the surface of the release film. The first mold is covered on the release film, and it is subjected to drawing treatment and pre-curing treatment I to form a second UV glue layer with a texture pattern, and then the release film is removed, and the first mold is covered on the glass substrate, And make the second UV glue layer on the first mold surface and the first UV glue layer on the glass substrate surface fit, then remove the first mold, and carry out the first UV glue layer and the second UV glue layer on the glass substrate surface Photocuring to obtain textured glass; the texture obtained by this preparation method has good strength and friction resistance, which can meet various reliability requirements of the glass surface, and can make the glass surface have a good feel and various light and shadow Effects (including but not limited to AG, yellow light, brushed and other texture effects, and the texture effect has a very high degree of fineness (<5μm), and multiple texture effects can be superimposed and applied, thereby enhancing the diversity of products; In addition, The preparation method is simple in process and low in cost. It does not require HF to participate in the whole process. It belongs to a kind of additive manufacturing. It will not produce waste gas, waste water, solid waste and other environmental problems, will not affect product strength, and defective products are easy to rework.

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

Preparation of the above texture on the surface of the strengthened glass substrate can ensure no damage to the glass.

The formation method of the first mold with a textured pattern on the surface can be further optimized. As an optional embodiment of the present invention, in step (a), the first mold with a textured pattern on the surface is processed by drawing the polymer film made later.

Usually, a large sheet of polymer film is drawn and then cut to obtain multiple first molds with textured patterns on the surface, one first mold with textured patterns on the surface corresponds to a glass substrate, and multiple first molds with textured patterns on the surface correspond to a glass substrate. The mold corresponds to multiple glass substrates, so the use of a polymer film as the first mold can realize batch processing of glass substrates. And the polymer membrane can be bent, so it can be used to process curved glass, which further expands the application range. The polymer membrane here is typically but not limited to a PET membrane or a TPU membrane.

There is further optimization for the composition of the first UV glue.

As an optional embodiment of the present invention, with the mass fraction of the first UV glue being 100%, the first UV glue includes the following components in mass fractions:

Resin 78%-88%, diphenyl phosphorus oxide 3-5%, fumed silicon dioxide 10-15% and silicon dioxide microspheres 0.5-1%.

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

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

Based on the mass fraction of the first UV glue as 100%, the first UV glue includes the following components in mass fractions: tripropylene glycol diacrylate 70-78%, 1,6-hexanediol diacrylate 8 -10%, diphenyl phosphorus oxide 3-5%, fumed silica 10-15% and silica microspheres 0.5-1%;

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 a 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, 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, fumed silica Typical but non-limiting mass fractions include 10%, 11%, 12%, 13%, 14% or 15%, typical but non-limiting mass fractions of silica microspheres include 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, or 1.0%.

Since the UV resin and the UV resin monomer are multi-hydroxyl 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. Silica can effectively increase the strength of the resin to ensure that after the resin is cured and formed, the glass will not produce stress whitening and brittle fracture when the resin is bent by external force. Therefore, the first UV glue has better adhesion, strength and weather resistance than conventional UV glue. Fumed silica and silica microspheres in the first UV glue can effectively increase 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 first UV glue is filled with fumed silica and silica microspheres, the glue transmittance 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 glue has good toughness after curing.

In order to achieve better cooperation with the above-mentioned first UV glue, the composition of the second UV glue is further optimized.

As an optional embodiment of the present invention, the second UV glue includes the following mass fractions of each component based on the mass fraction of the second UV glue as 100%:

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

In the second UV glue, tripropylene glycol diacrylate is mainly used as 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%; two Phenylphosphorus 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 not Limiting mass fractions include 5%, 6%, 7%, 8%, 9% or 10%.

Since UV resin and UV resin monomer are both low molecular chain bifunctional (acrylate) molecules, that is, each resin molecular monomer contains two functional groups to participate in UV curing reaction, so the final curing of the UV glue is easy to form network crosslinking. Polymers, rather than linear long-chain polymers, have higher surface hardness and strength than conventional OCA glue (methacrylate) monofunctional molecular glue, so this UV glue may be used for glass outer surface molding Abrasion-resistant, scratch-resistant textured layer. Therefore, the second UV glue has a high viscosity and higher surface hardness and strength after the glue is cured, which provides better weather and aging resistance for the second glue layer.

In addition, the composition of the first UV glue and the second UV glue can also be different from the above.

As an optional embodiment of the present invention, with the mass fraction of the first UV glue being 100%, the first UV glue includes the following components in mass fractions:

30-45% modified epoxy resin, 45-65% butyl acetate and 4-10% 3-(methacryloyloxy)propyltrimethoxysilane;

Typical but non-limiting mass fractions of modified epoxy resins include 30%, 32%, 34%, 35%, 36%, 38%, 40%, 42%, 44% or 45%; butyl acetate is typical but not Restrictive mass fractions include 45%, 48%, 50%, 52%, 54%, 55%, 58%, 60%, 62%, 64% or 65%; 3-(methacryloyloxy)propyltrimethoxy Typical but non-limiting mass fractions of oxysilanes include 4%, 5%, 6%, 7%, 8%, 9% or 10%.

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

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

In order to achieve better cooperation with the above-mentioned first UV glue, the composition of the second UV glue is further optimized.

As an optional embodiment of the present invention, with the mass fraction of the second UV glue being 100%, the second UV glue includes the following components in mass fractions:

Acrylate polymer 42-61%, polydipentaerythritol hexaacrylate 2-7%, butyl acetate 35-46%, 1-hydroxycyclohexyl phenyl ketone 1-3% and 3-(methacryloyloxy)propane Trimethoxysilane 1-3%.

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 acrylates 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-hydroxycyclohexyl phenyl ketone include 1%, 1.5%, 2%, 2.5% or 3%; 3- Typical but non-limiting mass fractions of (methacryloyloxy)propyltrimethoxysilane include 1%, 1.5%, 2%, 2.5% or 3%.

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

Both the above-mentioned first UV glue and the second UV glue contain acrylate functional groups. After the second UV glue is cured, there are still incompletely reacted active acrylate functional groups on the surface, which can continue to cure with the functional groups of the first UV glue. good fit. The specific composition of the second UV glue is defined above to meet various reliability requirements of glass (dry 100 grid, wet 100 grid, strong release, 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 glass, and at the same time has a good match with the second UV glue.

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

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

Preferably, the curing treatment temperature is 80-90° C., and the curing time is 5-10 minutes. A typical but non-limiting curing temperature is 80°C, 82°C, 85°C, 88°C or 90°C, and a typical but non-limiting curing time is 5 min, 8 min or 10 min.

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

As an optional embodiment of the present invention, in step (b), before coating the first UV glue, it also includes the step of setting a protective film on the surface of the glass substrate, and the protective film is located on the surface of the glass substrate. Away from the surface to which the first UV glue will be applied.

The setting of the protective film helps to prevent the glue from overflowing on the back when spraying.

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

As an optional embodiment of the present invention, the UV energy of the pre-curing treatment I is 600-800 mJ/cm ² .

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

As an optional embodiment of the present invention, in step (d), the mode 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.

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

As an optional embodiment of the present invention, the pressing pressure is 20-30Mpa, and the pressing time is 20min; typical but non-limiting pressing pressure is 20Mpa, 22Mpa, 24Mpa, 25Mpa, 28Mpa or 30Mpa. A typical but non-limiting pressing time is 20 minutes.

As an optional embodiment of the present invention, the UV energy of the pre-curing treatment II is 80-100 mJ/cm ² .

After pressing, pre-curing treatment II is carried out, 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.

As an optional embodiment of the present invention, in step (e), the UV energy for photocuring is 2000-3000 mJ/cm ² .

Typical but non-limiting UV energy for photocuring includes 2000 mJ/cm ² , 2200 mJ/cm ² , 2400 mJ/cm ² , 2500 mJ/cm ² , 2600 mJ/cm ² , 2800 mJ/cm ² or 3000 mJ/cm ² .

According to the second aspect of the present invention, there is also provided a textured glass, which is prepared by the method for preparing the glass surface texture.

In view of the advantages of the preparation method of the above-mentioned glass surface texture, a variety of three-dimensional effect textures are produced on the surface of the glass substrate, and the texture effect has good hardness and friction resistance, which meets various reliability requirements of the glass surface.

According to a third aspect of the present invention, a method for preparing the above-mentioned glass surface texture or an application of textured glass in the preparation of electronic products is also provided.

There are many types of electronic products, including but not limited to mobile phones, e-books, cars or computers.

In view of the advantages of the above method for preparing the glass surface texture or the textured glass, it has a good application prospect in the preparation of electronic products.

Below in conjunction with specific embodiment and comparative example, the present invention will be further described.

Example 1

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

(a) provide glass substrate 10, release film 40 and the first mold 50 with texture pattern on the surface;

The glass substrate 10 is a strengthened glass substrate. After the glass substrate 10 is cleaned, cover a protective film 20 on its back side (that is, the surface away from the first UV glue layer 30);

The method for preparing the first mold with a texture pattern on the surface includes: using a wire drawing machine to prepare the texture to be drawn on the PET film.

(b) Coating the first UV glue on a surface of the glass substrate 10, curing at 80-90° C. for 5 minutes, to form a first UV glue layer 30 with a thickness of 10 μm;

Based on the mass fraction of the first UV glue as 100%, the first UV glue includes the following components in mass fractions: tripropylene glycol diacrylate 75%, 1,6-hexanediol diacrylate 9%, diphenyl Phosphorus oxide 4%, fumed silica 11.5% and silica microspheres 0.5%;

(c) Coating the second UV glue on the surface of the release film 40, then covering the first mold 50 on the release film 40, and then carrying out wire drawing treatment and pre-curing treatment I to make the second UV glue transfer Print the textured pattern on the surface of the first mold to form the second UV glue layer 60 with textured pattern, specifically as shown in Figure 1;

Then the entire diaphragm formed by the first mold 50 and the release film 40 is cut to make a single first mold diaphragm that is 0.4-0.8 mm larger than the glass substrate profile;

Based on 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, diphenyl phosphine oxide 3% and butyl acetate 5%.

The drawing speed of the drawing process is 20mm/s.

The UV energy of pre-curing treatment I is 600mJ/cm ² .

The thickness of the UV glue layer is 32 μm.

(d) Remove the release film 40, cover the first mold 50 diaphragm on the glass substrate 10, specifically as shown in Figure 2, then put it into a vacuum bag for packaging, and put it into the water pressure after packaging. machine for pressing, and then pre-curing treatment II, so that the second UV glue layer 60 on the surface of the first mold is bonded to the first UV glue layer 30 on the surface of the glass substrate;

The pressing pressure is 25Mpa, and the pressing time is 20min.

The UV energy of the pre-curing treatment II is 90J/cm ² .

(e) the first mold 50 diaphragm is separated from the glass substrate 10, use alcohol to clean up the second UV glue layer 60 beyond the edge of the glass substrate, tear off the protective film 20 on the back of the glass substrate 10, and clean up The glass substrate is placed in a fixed baking pan, and the first UV glue layer 30 and the second UV glue layer 60 on the surface of the glass substrate are photocured, and the UV energy of photocuring is 2000mJ/cm ² , to obtain textured glass. Specifically, it is shown in FIG. 3 , and the corresponding 3D structure diagram is shown in FIG. 6 . Fig. 4 shows a physical picture of the textured glass of this embodiment.

Example 2

The invention provides a method for preparing glass surface textures, in addition to replacing the first mold (PET film) with textured patterns on the surface with a hard mold (made of acrylic) with textured patterns on the surface, that is, using the hard mold as Drawing die, all the other steps are identical with embodiment 1. Fig. 5 shows a pictorial view of the textured glass of this embodiment.

Example 3

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

Based on 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, diphenyl Phosphorus oxide 5%, fumed silica 10% and silica microspheres 1%.

Example 4

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

Based on 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, diphenyl phosphine oxide 4% and butyl acetate 5%.

Example 5

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

(a) providing a glass substrate, a release film and a first mold with a textured pattern on its surface;

The glass substrate is a strengthened glass substrate. After the glass substrate is cleaned, cover a protective film on its back (i.e. the surface away from the first UV glue layer);

The method for preparing the first mold with a texture pattern on the surface includes: using a wire drawing machine to prepare the texture to be drawn on the PET film.

(b) Coating the first UV glue on one surface of the glass substrate, curing at 80° C. for 5 minutes, to form a first UV glue layer with a thickness of 10 μm;

Taking the first UV glue mass fraction as 100%, the first UV glue includes the components of the following mass fractions: 45% modified epoxy resin, 50% butyl acetate and 3-(methacryloyloxy)propyltrimethoxy 5% base silane; Among them, the CAS number of the modified epoxy resin is 38891-59-7;

(c) Coat the second UV glue on the surface of the release film, then cover the first mold on the release film, and then perform drawing treatment and pre-curing treatment I to transfer the second UV glue to the first Texture patterns on the mold surface to form a second UV glue layer with texture patterns;

Then the whole diaphragm formed by the first mold and the release film is cut to make a single first mold diaphragm which is 0.4-0.8 mm larger than the glass substrate;

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

The wire drawing speed of wire drawing is 30mm/s;

The UV energy of pre-curing treatment I is 600mJ/cm ² ;

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

(d) Remove the release film, cover the first mold film on the glass substrate, then put it into a vacuum bag for packaging, put it into a hydraulic press for pressing after packaging, and then pre-cure Processing II, so that the second UV glue layer on the surface of the first mold is bonded to the first UV glue layer on the surface of the glass substrate;

The pressing pressure is 25Mpa, and the pressing time is 20min;

The UV energy of pre-curing treatment II is 90mJ/cm ² ;

(e) Separate the first mold film from the glass substrate, use alcohol to clean the second UV glue layer beyond the edge of the glass substrate, tear off the protective film on the back of the glass, and place the cleaned glass substrate on a fixed oven. In the tray, the first UV glue layer and the second UV glue layer on the surface of the glass substrate are photocured, the UV energy of photocuring is 2000mJ/cm ² , and the glass with texture is obtained.

Comparative example 1

This comparative example provides a kind of preparation method of glass substrate special texture, comprises the following steps:

(a) Provide membrane and glass substrate;

(b) The diaphragm includes a first surface and a second surface oppositely arranged, and the first surface of the diaphragm is coated with glue to form a glue layer with a thickness of 32 μm, and the glue layer is subjected to wire drawing;

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

The grade is JH-8280-20 glue, which includes the following components in mass fraction:

Acrylic fatty polyurethane 50%-70%, tetrahydrofurfuryl acrylate 5%-15%, 1,6 hexanediol diacrylate 5%-15%, N-vinylpyrrolidone 10%-20%, 1-hydroxy Cyclohexyl phenyl ketone 2%-4%, (2,4,6-3 methylbenzoyl) diphenyl phosphine oxide 1%-3%. The wire drawing speed of wire drawing is 30mm/s;

The UV energy of photocuring is 80mJ/cm ² ;

(c) Laminating the film on the glass substrate through OCA, and making the second surface of the film face the glass substrate to obtain textured glass.

Comparative example 2

This comparative example provides a method for preparing a special texture of a glass substrate, except that the glue in Comparative Example 1 is replaced with the first UV glue in Example 1, the rest is the same as Comparative Example 1.

Comparative example 3

This comparative example provides a method for preparing a special texture of a glass substrate, except that the glue in Comparative Example 1 is replaced by the second UV glue in Example 1, the rest is the same as Comparative Example 1.

Comparative example 4

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

Comparative example 5

This comparative example provides a method for preparing a special texture of a glass substrate, 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 Example 2 The first UV glue in 1, the rest are the same as in Example 2.

Comparative example 6

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

Comparative example 7

This comparative example provides a method for preparing a special texture of a glass substrate, 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 Be the glue in comparative example 1, all the other are identical with embodiment 2.

Comparative example 8

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

Comparative example 9

This comparative example provides a method for preparing a special texture of a glass substrate, except that the second UV glue in Example 2 is replaced by the first UV glue, and the rest is the same as that of Example 2.

In order to compare the technical effects of various embodiments and comparative examples, the following experimental examples are ad hoc.

Experimental example 1

The textured glass prepared by the preparation methods of each embodiment and comparative example was tested, and the specific results are shown in Table 1.

Hardness testing method: use Mitsubishi UNI to test the pencil, cut the refill into a 5MM cylindrical shape and smooth it on 400-grit sandpaper, then install it on a special pencil hardness tester (the load applied to the nib is 1kg, the pencil and The included angle of the horizontal plane is 45 degrees), push the pencil to slide forward about 1-2cm long, draw 3 times at different positions (one for each position), and then wipe off the pencil mark with an eraser.

Hardness judgment basis:

(1) The outer surface of the glass battery cover requires 8H without scratches (except for pencil hardness not coated with AF).

(2) No judgment will be made at the beginning of the scratch 1mm, if one of the three drawn lines has a scratch, it will be judged according to this hardness level.

Test method for rubbing resistance: Use RCA special paper tape to apply a fixed weight (55g, 175g, 275g) to the surface of the product. With a fixed diameter roller and a fixed speed motor, it is equipped with a specific counter.

The test conditions are as follows:

Test standard: ASTM F2357-04;

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

Friction mode: divided into continuous type and intermittent type;

Number of tests: such as 150 laps, 200 laps, 300 laps;

Test rate: 10 circles/min.

Judgment basis for friction resistance: No scratches on the surface after 150 continuous frictions with a load of 175g.

Table 1

It can be seen from the data in Table 1 that, compared with the comparative examples, the textured glass prepared by the preparation methods of the embodiments of the present invention not only has a certain hardness, but also maintains high friction resistance.

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

Comparative Example 2 and Comparative Example 3 are control experiments of Comparative Example 1 respectively, and Comparative Example 2 and Comparative Example 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 has increased, the degree of increase in hardness is limited due to the existence of the diaphragm.

Comparative Examples 4-8 are comparative experiments of Example 2. It can be seen from the data in Table 1 that the conventional glue on the market cannot form adhesion with the glass substrate, causing the glue to fall off, which cannot meet the requirements of the present invention for hardness and friction resistance.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (10)

1. The preparation method of the glass surface texture is characterized by comprising the following steps of:

(a) Providing a glass substrate, a release film and a first mold with texture patterns on the surface;

(b) Coating first UV glue on one surface of a glass substrate to form a first UV glue layer;

(c) Coating second UV glue on the surface of the release film, covering the first mold on the release film, and performing wire drawing treatment and pre-curing treatment I on the release film to transfer the texture pattern on the surface of the first mold by the second UV glue so as to form a second UV glue layer with the texture pattern;

(d) Removing the release film, covering the first mold on the glass substrate, and attaching 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;

(e) And removing the first mold, and carrying out photocuring on the first UV glue layer and the second UV glue layer on the surface of the glass substrate to obtain the glass with the texture.

2. The method for preparing a texture on a glass surface as claimed in claim 1, wherein in the step (a), the first mold having the texture pattern on the surface is prepared by drawing a polymer film;

preferably, in step (a), the glass substrate is a strengthened glass substrate;

preferably, in step (a), the glass substrate has a surface finish grade of 7 or more.

3. The method for preparing the glass surface texture according to the claim 1, wherein the first UV glue comprises the following components in percentage by mass based on 100% of the first UV glue in percentage by mass:

78-88% of resin, 3-5% of diphenyl phosphorus oxide, 10-15% of fumed silica and 0.5-1% of silica microspheres;

preferably, the resin includes at least one of a UV resin, an epoxy resin, and an acrylic resin;

preferably, the acrylic resin comprises tripropylene glycol diacrylate and/or 1, 6-hexanediol diacrylate;

preferably, the first UV glue comprises the following components in percentage by mass, with the percentage by mass of the first UV glue being 100%: 70-78% of tripropylene glycol diacrylate, 8-10% of 1, 6-hexanediol diacrylate, 3-5% of diphenyl phosphorus oxide, 10-15% of fumed silica and 0.5-1% of silica microspheres;

preferably, the second UV glue comprises the following components in percentage by mass based on 100% of the mass fraction of the second UV glue:

60-65% of tripropylene glycol diacrylate, 25-32% of 1, 6-hexanediol diacrylate, 3-5% of diphenyl phosphorus oxide and 5-10% of butyl acetate.

4. The method for preparing the glass surface texture according to the claim 1, wherein the first UV glue comprises the following components in percentage by mass based on 100% of the first UV glue in percentage by mass:

30-45% of modified epoxy resin, 45-65% of butyl acetate and 4-10% of 3- (methacryloyloxy) propyl trimethoxy silane;

preferably, the second UV glue comprises the following components in percentage by mass based on 100% of the mass fraction of the second UV glue:

42-61% of acrylate polymer, 2-7% of poly dipentaerythritol hexaacrylate, 35-46% of butyl acetate, 1-3% of 1-hydroxycyclohexyl phenyl ketone and 1-3% of 3- (methacryloyloxy) propyl trimethoxy silane.

5. The method for preparing a texture on a glass surface as claimed in any one of claims 1 to 4, wherein in the step (b), the first UV glue is applied by spraying or silk-screening;

preferably, in the step (b), the thickness of the first UV glue layer is 8-12 μm;

preferably, step (b) further comprises the step of arranging a protective film on the surface of the glass substrate before the first UV glue is applied, wherein the protective film is positioned on the surface of the glass substrate facing away from the first UV glue to be applied.

6. The method for producing a glass surface texture according to any one of claims 1 to 4, wherein in the step (c), the speed of the drawing process is 30 to 40mm/s;

preferably, the UV energy of the pre-curing treatment I is 600-800mJ/cm ² ；

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

7. The method according to any one of claims 1 to 4, wherein the step (d) of applying the second UV glue layer on the first mold surface to the first UV glue layer on the glass substrate surface comprises: pressing and pre-curing treatment II;

preferably, the pressing pressure is 20-30Mpa, and the pressing time is 15-25min;

preferably, the UV energy of the pre-curing treatment II is 80-100mJ/cm ² 。

8. The method of any of claims 1 to 4, wherein in step (e), the photocured UV energy is from 2000 to 3000mJ/cm ² 。

9. A textured glass, characterized by being produced by the method of producing a glass surface texture according to any one of claims 1 to 8.

10. Use of the method of producing a glass surface texture according to any one of claims 1 to 8 or the textured glass according to claim 9 for producing electronic products.

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