Optical sheet and method for manufacturing the same, glass and method for manufacturing the same

Abstract

The present application relates to an optical sheet, and aims to solve the technical problem of poor smoothness and easy abrasion of the existing liquid crystal display glass.The optical sheet comprises a substrate layer, a concave-convex structure layer arranged on the surface of the substrate layer, and a functional layer arranged on the surface of the concave-convex structure layer away from the substrate layer, wherein the functional layer comprises nano-silver ions, polyvinyl chloride and silicon dioxide.The optical sheet of the present application comprises a concave-convex structure layer, which makes the optical sheet have good smoothness, and the concave-convex structure layer makes the optical sheet have improved abrasion resistance, and the nano-silver ions in the functional layer provide antiviral function, the polyvinyl chloride provides antibacterial function, and the silicon dioxide further improves the abrasion resistance of the functional layer.

Description

Technical Field

[0001] This invention belongs to the field of surface treatment technology, specifically relating to an optical sheet and its preparation method, and glass and its preparation method. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] The main process for manufacturing commercial LCD glass currently involves spraying a smooth coating onto the glass surface. The smooth coating consists of 2% to 5% fluoride, 5% to 10% polytetrafluoroethylene (PTFE), 60% to 70% silica, and 10% to 20% alkyd resin. The smooth coating is then baked for 30 to 60 minutes after being sprayed onto the glass surface. However, the smoothness of this type of glass is relatively poor, and because the smooth coating is formed by spraying, it is easily worn away during cleaning. Summary of the Invention

[0004] The present invention aims to at least partially solve the technical problems of poor smoothness and easy wear of existing liquid crystal display glass.

[0005] To achieve the above objectives, a first aspect of the present invention provides an optical sheet comprising: a substrate layer; an uneven structure layer disposed on the surface of the substrate layer; and a functional layer disposed on the surface of the uneven structure layer away from the substrate layer, the functional layer comprising nano-silver ions, polyvinyl chloride, and silicon dioxide.

[0006] The beneficial effects of the optical sheet of the present invention are as follows: First, the uneven structure layer makes the optical sheet smoother and improves the wear resistance of the optical sheet; Second, the nano silver ions in the functional layer provide antiviral function, polyvinyl chloride provides antibacterial function, and silicon dioxide further improves the wear resistance of the functional layer.

[0007] In addition, the optical sheet according to the present invention may also have the following additional technical features.

[0008] According to one embodiment of the present invention, the base layer comprises a PET sheet, and the textured layer comprises a UV-curable adhesive.

[0009] According to one embodiment of the present invention, the uneven structure layer includes a plurality of structural units, the height of the uneven structure layer ranges from 0.1 micrometer to 0.6 micrometer, and the spacing between the plurality of structural units ranges from 20 micrometer to 250 micrometer.

[0010] According to one embodiment of the present invention, the height of the uneven structure layer ranges from 0.2 micrometers to 0.4 micrometers, and the spacing between the plurality of structural units ranges from 50 micrometers to 100 micrometers.

[0011] According to one embodiment of the present invention, the functional layer further includes sodium stearate.

[0012] A second aspect of the present invention provides a method for preparing an optical sheet according to the first aspect of the present invention, comprising the following steps:

[0013] Step S1: Provide a substrate layer and form a UV adhesive layer on the substrate layer;

[0014] Step S2: Form an uneven structure on the surface of the UV adhesive layer away from the substrate layer;

[0015] Step S3: Cure the UV adhesive layer to form an uneven textured layer;

[0016] Step S4: Form a functional coating on the surface of the uneven structure layer away from the substrate layer. The functional coating comprises 10% to 20% nano-silver ions, 20% to 30% polyvinyl chloride, and 20% to 30% silica.

[0017] Step S5: Dry the functional coating to form a functional layer.

[0018] The beneficial effects of the optical sheet preparation method of the present invention are: using UV adhesive as the material of the uneven structure layer, the uneven structure can be shaped and formed by irradiating the UV adhesive with UV light. The method is simple, low cost, and the UV adhesive has a good shaping effect and the uneven structure layer is stable.

[0019] According to one embodiment of the present invention, step S2 includes the following sub-steps:

[0020] Step S21: Provide a female mold, the female mold including a convex and concave structure; and

[0021] Step S22: Transfer the raised and recessed structure of the master mold onto the UV adhesive layer to form a raised and recessed structure on the UV adhesive layer.

[0022] According to one embodiment of the invention, the functional coating further includes 10% to 20% sodium stearate, 1% to 3% coupling agent, and 1% to 2% leveling agent.

[0023] A third aspect of the present invention provides a glass, characterized in that the glass comprises:

[0024] Pretreated glass plates; and

[0025] The optical sheet according to any one of claims 1-4 is disposed on a pretreated glass plate.

[0026] The beneficial effects of the glass of the present invention are as follows: First, the nano-silver ions in the functional layer of the glass provide antiviral function, polyvinyl chloride provides antibacterial function, and silicon dioxide further improves the wear resistance of the functional layer; Second, the uneven structure layer on the glass surface makes the glass less prone to wear during subsequent cleaning; and Third, the smoothness of the glass is improved due to the selection of the height range and spacing range of the uneven structure.

[0027] A fourth aspect of the present invention provides a method for preparing glass, comprising the following steps:

[0028] Step S1: Provide the pre-treated glass plate;

[0029] Step S2: Provide an optical sheet according to the first aspect of the present invention; and

[0030] Step S3: Attach the optical sheet to the pretreated glass plate.

[0031] The glass preparation method provided by this invention has the following advantages: optical sheets are directly pasted onto the surface of the glass plate, the method is simple, easy to mass-produce, and reduces costs. Attached Figure Description

[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0033] Figure 1 This is a schematic diagram of the structure of an optical sheet provided in an embodiment of the first aspect of the present invention.

[0034] Figure 2 This is a schematic diagram of the structure of an optical sheet provided in an embodiment of the first aspect of the present invention.

[0035] Figure 3 This is a schematic diagram of the structure of an optical sheet provided in an embodiment of the first aspect of the present invention.

[0036] Figure 4 This is a flowchart of a method for preparing an optical sheet according to an embodiment of the second aspect of the present invention.

[0037] Figure 5 This is a schematic diagram of the structure of a glass provided in an embodiment of the third aspect of the present invention.

[0038] Figure 6 This is a flowchart of a glass preparation method provided in an embodiment of the fourth aspect of the present invention.

[0039] The reference numerals in the attached figures are as follows:

[0040] 1: Optical sheet; 2: Glass;

[0041] 10: Basal layer;

[0042] 20: Uneven structure layer;

[0043] 30: Functional layer;

[0044] 40: Pre-treated glass plate. Detailed Implementation

[0045] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0046] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0047] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0048] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0049] like Figures 1 to 3 As shown, a first aspect of the present invention provides an optical sheet 1, the optical sheet 1 comprising: a substrate layer 10; a textured layer 20 disposed on the surface of the substrate layer 10; and a functional layer 30 disposed on the surface of the textured layer 20 away from the substrate layer 10, the functional layer 30 comprising nano-silver ions, polyvinyl chloride and silicon dioxide.

[0050] The substrate 10 is a PET sheet, which stands for polyethylene terephthalate. PET sheets are lightweight, thin, and have high light transmittance. PET sheets exhibit excellent physical and mechanical properties over a wide temperature range, with a long-term operating temperature up to 120°C. They also possess excellent electrical insulation properties, maintaining good electrical performance even at high temperatures and frequencies. Furthermore, they exhibit good creep resistance, fatigue resistance, abrasion resistance, and dimensional stability. The size of the substrate 10 ranges from 100 micrometers to 300 micrometers. In one embodiment, the substrate 10 is 125 micrometers.

[0051] The material of the uneven structure layer 20 is a UV adhesive, i.e., an ultraviolet light curable adhesive. In one embodiment, the UV adhesive comprises 30 to 50 parts of optical UV resin; 45 to 70 parts of photocurable monomer; and 2 to 13 parts of photoinitiator. The optical UV resin comprises the following components: 20 to 80 parts of isocyanate; 20 to 80 parts of elastic segments; 20 to 80 parts of rigid segments; 10 to 35 parts of hydroxyethyl acrylate; 0.02 to 0.5 parts of catalyst; and 0.02 to 0.5 parts of polymerization inhibitor. The UV adhesive is colorless and transparent, has high adhesive strength, and a light transmittance >90% after curing.

[0052] The uneven structure layer 20 has an uneven structure formed on its surface away from the substrate layer 10. The uneven structure layer 20 includes multiple structural units arranged in an array, which are connected to or spaced apart from each other. (See [link to previous text]). Figure 1In one embodiment, the convex-concave structure includes multiple semi-circular peaks, with troughs formed between adjacent peaks, and the peaks and troughs constitute the convex-concave structure. See also... Figure 2 In one embodiment, the convex-concave structure includes convex ridges with angular edges, the cross-section of which is trapezoidal, and concave valleys formed between adjacent convex ridges. The convex ridges and the convex-concave structure constitute the convex-concave structure. Please refer to [link / reference]. Figure 3 In one embodiment, the convex-concave structure includes convex ridges with a triangular cross-section. The height of the convex-concave structure layer 20 is the distance between the highest point of the structural unit and the base layer 10. The height of the convex-concave structure layer 20 ranges from 0.1 to 0.6 micrometers. In one embodiment, the height of the convex-concave structure layer 20 ranges from 0.2 to 0.4 micrometers. In one embodiment, the height of the convex-concave structure layer 20 is 0.3 micrometers. The spacing between individual structural units in the convex-concave structure layer 20 ranges from 20 to 250 micrometers. In one embodiment, the spacing between individual structures in the convex-concave structure layer 20 ranges from 50 to 100 micrometers. In one embodiment, the spacing between individual structures in the convex-concave structure layer 20 ranges from 75 micrometers. The convex-concave structure provides good diffuse reflection of ambient light.

[0053] The functional layer 30 is an antiviral and antibacterial functional layer, meaning its function is to provide antiviral and antibacterial properties for the optical sheet 1. The functional layer 30 includes nano-silver ions, polyvinyl chloride, silica, and sodium stearate. Nano-silver ions provide antiviral properties, polyvinyl chloride provides antibacterial properties, and silica improves the wear resistance of the functional layer 30. Silica also diffuses ambient light. Sodium stearate enhances the adhesion strength between the functional layer 30 and the substrate layer 10, and also provides lubrication. Referring to Tables 1 and 2 below, it can be seen that the functional layer 30 of the optical sheet 1 of the present invention has better antiviral and antibacterial effects compared to other optical sheets 1.

[0054] Table 1 Antiviral test data for optical sheets

[0055]

[0056] Table 2 Antibacterial test data for optical sheets

[0057]

[0058] Compared to other organic antibacterial agents, inorganic silver antibacterial agents offer advantages such as safety, non-volatility, durability, and heat resistance. For the human body, inorganic silver antibacterial agents are safer and gentler than organic ones. The bactericidal effect of nano-silver lies in the release of silver ions, which is achieved through the porous or mesoporous structure of nano-silica, resulting in a sustained-release effect and long-lasting bactericidal effect. Nano-silver uses nano-silica as a carrier or shell, significantly increasing its wear resistance and adhesion.

[0059] The antiviral mechanism of the optical sheet is as follows: the functional layer releases antibacterial silver ions in a moderate manner. Microorganisms themselves have a negative charge on their surface, while the positively charged antibacterial silver ions are attracted to the surface of the microorganisms, causing the cell wall to rupture due to the charge imbalance. In addition, when the antibacterial silver ions enter the interior of the microorganisms, they react with enzymes within the microorganisms, inhibiting the microorganisms.

[0060] The beneficial effects of the optical sheet 1 of the present invention are as follows: First, the base layer 10 is a PET sheet, which is thin, light-transmitting, and has good light transmittance; second, the concave-convex structure gives the optical sheet 1 an anti-glare effect; third, the height and spacing dimensions of the concave-convex structure layer result in good smoothness of the optical sheet 1; fourth, the concave-convex structure is directly bonded to the base layer 10 using UV-curable adhesive, thus the concave-convex structure has good adhesion to the base layer 10; fifth, the functional layer 30 is an antiviral and antibacterial functional layer 30, and its antiviral and antibacterial properties are long-lasting; sixth, the nano-silver ions in the functional layer 30 provide antiviral and antibacterial functions, polyvinyl chloride provides antibacterial functions, and silica further improves the wear resistance of the functional layer 30; seventh, the antiviral and antibacterial effects of the functional layer are long-lasting; eighth, the sodium stearate in the functional layer 30 further enhances the bonding strength between the functional layer 30 and the base layer 10; and ninth, the concave-convex structure layer 20 includes a concave-convex structure, thus it is not easily worn during the cleaning process in use.

[0061] Please see Figure 4 A second aspect of the present invention provides a method for preparing the above-described optical sheet 1, comprising the following steps:

[0062] Step S1: Provide a substrate layer 10 and form a UV adhesive layer on the substrate layer 10;

[0063] Step S2: Form an uneven structure on the surface of the UV adhesive layer away from the substrate layer 10;

[0064] Step S3: Cure the UV adhesive layer to form an uneven structure layer 20;

[0065] Step S4: Form a functional coating on the surface of the uneven structure layer 20 away from the substrate layer 10. The functional coating comprises 10% to 20% nano-silver ions, 20% to 30% polyvinyl chloride, and 20% to 30% silica; and

[0066] Step S5: Dry the functional coating to form functional layer 30.

[0067] In step S1, the base layer 10 is a PET sheet.

[0068] Step S2 includes the following sub-steps:

[0069] Step S21: Provide a female mold, the surface of which has a raised and recessed structure;

[0070] Step S22: Press the surface of the master mold with the raised and recessed structure onto the UV adhesive layer, thereby forming the raised and recessed structure on the UV adhesive layer; and

[0071] Step S23: UV light is used to irradiate the UV adhesive layer to shape the uneven structure.

[0072] In step S21, the raised and recessed structures on the master mold and the raised and recessed structures on the UV adhesive layer are corresponding opposite structures. The master mold can be prefabricated according to the required pattern of the raised and recessed structure layer 20. The raised and recessed patterns on the master mold can be achieved through an etching process.

[0073] Step S22 can be achieved through a heat transfer process. During the heat transfer process, the UV adhesive layer needs to be heated for a certain period of time. The heating temperature range is 60°C to 80°C, and the heating time is 20 to 30 minutes. In one embodiment, the heating temperature is 70°C, and the heating time is 25 minutes.

[0074] Step S23: The UV adhesive layer is cured under UV light irradiation, thereby fixing the uneven structure to the surface of the substrate 10.

[0075] In step S3, a functional coating is formed on the surface of the uneven structure layer 20 using a roller coating, spray coating, or dip coating process. The functional coating comprises 10% to 20% nano silver ions, 20% to 30% polyvinyl chloride, 20% to 30% silica, 10% to 20% sodium stearate, 1% to 3% coupling agent, and 1% to 2% leveling agent.

[0076] The preparation method of the functional coating is as follows: First, the nano-silver is composited into the silver plating solution using a silicate process. Then, porous or mesoporous nano-silica is prepared using a template process and coated with nano-silver to form a functional coating.

[0077] In step S4, the drying temperature of the uneven structure is 80°C to 120°C, and the drying time is 20 to 30 minutes. In one embodiment, the drying temperature is 100°C, and the drying time is 30 minutes. During the drying process, the coupling agent and leveling agent in the functional coating evaporate and disappear, leaving behind nano-silver ions, polyvinyl chloride, silica, and sodium stearate to form the functional layer 30. Since silica serves as a carrier, nano-silver can be firmly attached to the surface of the uneven structure layer through silver plating.

[0078] The method for preparing the optical sheet 1 provided in this embodiment has the following beneficial effects: First, UV adhesive is used as the material for the uneven structure layer 20. The uneven structure can be shaped and formed into the uneven structure layer 20 by irradiating the UV adhesive with UV light. The method is simple, low-cost, and the UV adhesive has a good shaping effect, resulting in a stable uneven structure layer 20. Second, a master mold is provided, and the uneven structure of the master mold is transferred onto the UV adhesive layer, making the uneven structure of the UV adhesive layer accurate and allowing for roll fabrication, thus reducing costs. Third, the drying temperature required for the functional coating is lower, the drying time is shorter, and the energy consumption is lower.

[0079] Please see Figure 5 A third aspect of the present invention provides a glass comprising:

[0080] Pretreated glass plate 40; and

[0081] According to the first aspect of the present invention, the optical sheet 1 is disposed on the pretreated glass plate 40.

[0082] Optical sheet 1 is bonded to the glass plate using OCA adhesive. OCA adhesive is easy to cure, transparent, and has strong adhesion. OCA adhesive is colorless and transparent, with a light transmittance of over 95%, good bonding strength, and can be cured at room temperature or medium temperature with minimal curing shrinkage.

[0083] The beneficial effects of the glass provided by this invention are as follows: First, the nano-silver ions in the functional layer 30 of the glass provide antiviral function, polyvinyl chloride provides antibacterial function, and silicon dioxide further improves the wear resistance of the functional layer 30; Second, the antiviral and antibacterial properties of the glass are durable; Third, the uneven structure layer 20 on the surface of the glass makes it less prone to wear during subsequent cleaning; and Fourth, the smoothness of the glass is improved due to the selection of the height range and spacing range of the uneven structure.

[0084] Please see Figure 6 The fourth aspect of the present invention provides a method for preparing glass, comprising the following steps:

[0085] Step S10: Provide the pretreated glass plate 40;

[0086] Step S20: Provide the optical sheet 1 of the first aspect of the present invention; and

[0087] Step S30: Attach the optical sheet 1 onto the pretreated glass plate 40.

[0088] A preprocessing step is included before step S10, which includes the following steps:

[0089] Step a: Provide an untreated glass plate;

[0090] Step b: Temper, screen print, and clean the untreated glass plate to obtain the pretreated glass plate 40.

[0091] Specifically, the pretreatment steps include cutting the untreated glass plate into pieces, grinding and chamfering the edges, cleaning and inspection, tempering, screen printing, alkaline cleaning and plasma cleaning, etc.

[0092] The glass preparation method provided by the present invention has the following beneficial effects: First, the optical sheet 1 is directly pasted onto the surface of the glass plate, the method is simple, easy to mass-produce, and reduces costs; Second, the optical sheet 1 has antiviral and antibacterial functions, thereby enabling the glass to also have antiviral and antibacterial functions, and the antiviral effect is long-lasting; and Third, the pretreatment step makes the pretreated glass plate 40 more suitable for pasting the optical sheet 1.

[0093] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0094] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0095] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a computer-readable storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or a cooling mode control device (such as a processor) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned computer-readable storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0096] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An optical sheet, characterized in that, The optical sheet includes: basal layer; An uneven structure layer, wherein the uneven structure layer is disposed on the surface of the substrate layer; and A functional layer is disposed on the surface of the uneven structure layer away from the base layer, and the functional layer includes nano silver ions, polyvinyl chloride, silicon dioxide and sodium stearate; The uneven structure layer includes multiple structural units, the height of which ranges from 0.1 micrometers to 0.6 micrometers, and the spacing between the multiple structural units ranges from 20 micrometers to 250 micrometers.

2. The optical sheet according to claim 1, characterized in that, The base layer comprises a PET sheet, and the textured layer comprises a UV-curable adhesive.

3. The optical sheet according to claim 1, characterized in that, The height of the uneven structure layer ranges from 0.2 micrometers to 0.4 micrometers, and the spacing between the plurality of structural units ranges from 50 micrometers to 100 micrometers.

4. A method for preparing an optical sheet according to any one of claims 1-3, comprising the following steps: Step S1: Provide the substrate layer and form a UV adhesive layer on the substrate layer; Step S2: Form an uneven structure on the surface of the UV adhesive layer away from the substrate layer; Step S3: Curing the UV adhesive layer to form the uneven structure layer; Step S4: Form a functional coating on the surface of the uneven structure layer away from the substrate layer, the functional coating comprising 10% to 20% of the nano-silver ions, 20% to 30% of the polyvinyl chloride, and 20% to 30% of silica; and Step S5: Dry the functional coating to form the functional layer.

5. The method for preparing the optical sheet according to claim 4, characterized in that, Step S2 includes the following sub-steps: Step S21: Provide a female mold, the female mold including a convex and concave structure; and Step S22: Transfer the convex and concave structure of the master mold onto the UV adhesive layer to form the convex and concave structure on the UV adhesive layer.

6. The method for preparing the optical sheet according to claim 4, characterized in that, The functional coating also includes 10% to 20% sodium stearate, 1% to 3% coupling agent, and 1% to 2% leveling agent.

7. A type of glass, characterized in that, The glass comprises: Pretreated glass plates; and The optical sheet according to any one of claims 1-3 is disposed on the pretreated glass plate.

8. A method for preparing glass, comprising the following steps: Step S1: Provide the pre-treated glass plate; Step S2: Provide an optical sheet according to any one of claims 1-3; as well as Step S3: Adhere the optical sheet to the pretreated glass plate.

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