Manufacturing process of high-heat-insulation ray-proof antibacterial glass

Abstract

The invention provides a manufacturing process of high-heat-insulation ray-proof antibacterial glass. The high-heat-insulation ray-proof antibacterial glass comprises outer-layer glass, a middle functional layer, inner-layer glass and an extensible layer, the manufacturing process comprises a PVB adhesive film preparation process and a laminated glass whole process, wherein the PVB adhesive film preparation process specifically comprises the steps of raw material mixing, melt extrusion, tape casting and coiling; the whole process of the laminated glass comprises the steps of glass pretreatment, interlayer assembly, high-temperature and high-pressure forming and post-treatment and quality inspection. According to the design scheme of the multi-film composite laminated glass, based on the structural characteristics of the laminated glass, a layered ray-blocking customized glass scheme is provided in combination with the combination of heat-insulating PVB films and other films with different functions, and the scheme is suitable for scenes such as sunlight rooms, agricultural planting or market curtain walls and the like.

Description

Technical Field

[0001] The invention relates to the technical field of glass preparation, in particular to a process for producing highly heat-insulating and ray-proof antibacterial glass. Background Art

[0002] Insulating laminated insulating glass, a building material with excellent thermal insulation properties, has been widely used in the construction field in recent years. Insulating laminated insulating glass is usually prepared using colorless float glass, coated glass, tempered glass, etc. as the base material. After a series of treatments, it is coated with an insulating interlayer. The transparency and thermal insulation properties of the prepared glass material can meet daily needs. The spacer layer material mainly plays a supporting and thermal insulation role. In addition, the spacer layer is often filled with inert gases such as argon and nitrogen. These gases have low thermal conductivity and can significantly improve the thermal insulation performance of insulating glass. In addition, flame retardant materials can be added to the insulating interlayer of insulating glass to improve its flame retardancy and effectively prevent the spread of fire.

[0003] However, on the technical level, ordinary glass cannot achieve the synergy of UV blocking and red light enhancement (the existing technology has an UV blocking rate of ≤50%, and a red light transmittance of ≤65%); in terms of functions, it is difficult to couple and integrate functions such as sound insulation (RW≥45dB), heat insulation (U value ≤0.8), and antibacterial.

[0004] Furthermore, according to the "General Specification for Energy Conservation and Renewable Energy Utilization in Buildings" (GB 55015-2025), the heat transfer coefficient of exterior windows in new buildings must be ≤1.1 W / (m²·K), while existing insulating glass only reaches 1.6-2.0. Of the average annual energy consumption of agricultural greenhouses, supplemental lighting due to ineffective spectral transmission in traditional glass greenhouses accounts for over 25%. Summary of the Invention

[0005] The present invention provides a process for producing high-heat-insulating and ray-proof antibacterial glass, which can block infrared rays and reduce heat passage through the principle of ion resonance.

[0006] The technical solution of the present invention is achieved as follows: a highly heat-insulating and radiation-proof antibacterial glass comprises an outer layer of glass, an intermediate functional layer, an inner layer of glass and an expandable layer; The outer glass is made of ordinary float glass or ultra-clear glass, with a low-emissivity film on the surface; The intermediate functional layer is a PVB film layer containing rare earth thermal insulation material, superimposed with an antibacterial functional layer; The inner glass is a coated glass that adjusts light transmittance; The expandable layer is a functional film embedded between the PVB layers; Its production process includes the PVB film preparation process and the entire laminated glass process. The PVB film preparation process specifically includes raw material mixing, melt extrusion, cast molding and winding into rolls; the laminated glass process includes glass pretreatment, interlayer assembly, high-temperature and high-pressure molding, as well as post-processing and quality inspection.

[0007] The production process of a high-insulation and radiation-proof antibacterial glass includes the PVB film preparation process and the entire laminated glass process, specifically including the following steps: Step A. PVB film raw material mixing: PVB resin powder, 3GO plasticizer, and rare earth insulation material are mixed to ensure uniform dispersion; Step B. PVB film melt extrusion: The mixed material is melted through a twin-screw extruder at a temperature of 160-210°C and passed through a filter to remove impurities; Step C. PVB film casting: The melt is extruded through a T-die onto a cooling roller to form a uniform film with a thickness of 0.38-1.52 mm; Step D. Winding the PVB film into a roll: After cooling and setting, rewind the film and inspect its thickness, transparency, and the absence of bubbles before setting aside. Step E. Glass pretreatment: Clean the original glass, apply a low-emissivity coating to the surface, and spray a nano-silver antibacterial coating on the glass surface. Step F. Interlayer assembly: Laminate the layers in the order of "outer glass - PVB film - functional film - inner glass" and vacuum to remove air bubbles; Step G. High temperature and high pressure molding: autoclave treatment at a temperature of 60-150°C and a pressure of 0.2-1.5 MPa for 2-4 hours to bond the PVB to the glass; Step H. Post-processing and quality inspection: Cut the edges and test light transmittance, thermal insulation performance (emissivity ≤ 0.15), antibacterial efficiency ≥ 99%, and impact strength.

[0008] Preferably, (1) PVB resin powder: select powder with a degree of polymerization of 1000-1500 and a hydroxyl content of 17.0-20.0%, and pre-dry it to a moisture content of ≤1.5%; (2) 3GO plasticizer; (3) rare earth thermal insulation material ≤5%: cerium oxide CeO2 and lanthanum oxide La2O3 are mixed in a ratio of 3:2, with a nano-particle size of 50-100nm; (4) the rare earth thermal insulation material is dispersed in the 3G0 plasticizer, and a high-speed stirrer is used to prepare a dispersion; (5) the 3GO plasticizer containing the rare earth thermal insulation material and the PVB resin powder are then weighed and continuously passed through a twin-screw extruder and a casting die in a ratio of 20%-35%:80%-65%, and after cooling, shaping, and winding, a PVB film is obtained.

[0009] Preferably, the specific process of melt extrusion of the PVB film in step B is as follows: the twin-screw extruder is temperature-controlled in sections: zone I 160-170°C, zone II 180-190°C, zone III 200-210°C, screw speed 80-120rpm, die pressure 10-15MPa, melt viscosity controlled to 3000-5000Pa·s, and the melt is filtered through a 200-500 mesh filter to remove impurities.

[0010] Preferably, the specific process of the PVB film casting in step C is: T-die width 1.2-2.5m, lip gap adjustment accuracy ±0.01mm, cooling roller temperature 20-25°C, line speed matching extrusion volume 5-15m / min, film thickness tolerance ±0.02mm, surface roughness Ra≤0.1μm.

[0011] Preferably, the specific process of winding the PVB film into a roll in step D is: tension control 20-50N, winding speed is synchronized with the casting line speed, slitting width is customized according to customer needs ±0.5mm, quality inspection: infrared spectroscopy is used to detect the uniformity of rare earth dispersion, and transmittance is ≥70% in the visible light band.

[0012] Preferably, the glass pretreatment process in step E is as follows: a float glass sheet with a thickness of 3-12 mm is cleaned with pure water and ultrasonic waves at 40 kHz and 50°C, and the surface cleanliness after drying is ≤ 5 μm particles. The Low-E film is deposited by magnetron sputtering in an Ar atmosphere using an Ag / Cr target, with a film thickness of 10-20 nm and an emissivity of ≤ 0.1. The antibacterial treatment is performed by spraying a nanosilver sol with a particle size of 10-20 nm and a solid content of 0.5%, and drying at 80°C to obtain a silver loading of ≥ 50 mg / m².

[0013] Preferably, the specific process of the interlayer assembly in step F is as follows: stacking order: outer glass → PVB film 0.76mm → functional film → inner glass; vacuum pre-pressing: vacuum degree ≤10Pa, temperature 60-100°C pre-pressing for 30 minutes to eliminate bubbles.

[0014] Preferably, the specific process of high temperature and high pressure molding in step G is as follows: autoclave parameters: heating rate 2°C / min to 145±5°C, pressure 1.5MPa maintained for 2 hours, pressure released after cooling to 50°C, the film flows to fill the gap, and the bonding strength is ≥5MPa.

[0015] Preferably, the specific process of post-processing and quality inspection of step H is as follows: edge cutting: diamond tool, chamfer 0.5-1mm, roughness ≤0.5μm; performance testing: UV blocking rate 280-400nm ≥99%, infrared blocking rate 780-2500nm ≥95%, antibacterial rate ≥99.9%, impact resistance, 1000g steel ball dropped 1m without breakage.

[0016] Compared with the existing technology, the advantages of the present invention are: the PVB film in this solution is added with rare earth thermal insulation material, which absorbs infrared bands through the principle of ion resonance, effectively reducing the shading coefficient (SC≤0.5) and enhancing the thermal insulation effect; This solution adopts a modular design, adding different modules to adapt to different specific demand scenarios; Integrated antimicrobial properties: Surface coating and antimicrobial agents within the film work synergistically to extend service life; The multi-film composite laminated glass design scheme, based on the structural characteristics of laminated glass, combines thermal insulation PVB film and other functional films to propose a customized glass solution with layered radiation blocking, suitable for scenarios such as sunrooms, agricultural planting or shopping mall curtain walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the glass of the present invention; Figure 2 is a process flow chart of the present invention; In the figure: 1. Outer glass; 2. Middle functional layer; 3. Inner glass; 4. Expandable layer; 21. PVB film; 22. Antibacterial functional layer. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0020] ‌Structural design see Figure 1 , ‌Multi-layer composite structure‌: Outer glass 1: Ordinary float glass or ultra-clear glass with a low-emissivity coating (such as single-silver / double-silver Low-E coating) on ​​the surface to reflect far-infrared rays and reduce heat radiation.

[0021] ‌Intermediate functional layer 2‌: PVB film 21 (containing rare earth insulation material) superimposed on an antibacterial functional layer 22 (such as nanosilver coating).

[0022] Inner glass 3: You can choose tinted glass (such as green / gray) or coated glass as needed to further adjust the light transmittance.

[0023] Expandable Layer 4: Functional films such as sound insulation and UV filters are embedded between PVB layers, making it suitable for scenarios such as agricultural greenhouses (UV filtering), sunrooms (high thermal insulation), and shopping mall curtain walls (sound insulation and heat insulation).

[0024] Glass production process Figure 2 , ‌PVB film preparation process‌ Raw material mixing: Mix PVB resin powder (65%-80%), 3GO plasticizer (20%-35%), and rare earth insulation material (such as cerium oxide / lanthanum oxide, ratio ≤5%) to ensure uniform dispersion.

[0025] Melt Extrusion: The mixed material is melted by a twin-screw extruder (temperature 160-210°C) and passed through a filter to remove impurities.

[0026] ‌Tape Casting‌: The melt is extruded through a T-die onto a cooling roller to form a uniform film with a thickness of 0.38-1.52 μm.

[0027] ‌Roll into rolls‌: After cooling and shaping, roll it up and inspect the quality (thickness, transparency, and bubble-free) for later use.

[0028] ‌Laminated glass full process‌ Glass pretreatment: Clean the original glass and coat the surface with a low-emissivity film (magnetron sputtering or chemical vapor deposition).

[0029] Antibacterial treatment: Spray nano-silver antibacterial coating on the glass surface (or mix it into PVB film).

[0030] ‌Sandwich assembly‌: Stack in the order of "outer glass - PVB film - functional film (optional) - inner glass" and remove bubbles by vacuum extraction.

[0031] High temperature and high pressure molding: Autoclave treatment (temperature 60-150°C, pressure 0.2-1.5 MPa, time 2-4 hours) allows PVB to bond to glass.

[0032] Post-processing and quality inspection: Cut the edges and test the light transmittance, thermal insulation performance (emissivity ≤ 0.15), antibacterial efficiency (≥ 99%) and impact strength.

[0033] Key technological innovation Rare earth thermal insulation material: absorbs infrared waves through ion resonance and reduces the shading coefficient (SC≤0.5).

[0034] Modular design: supports adding UV absorption layer (agricultural scenarios), color-changing lighting layer (commercial scenarios) and other expansion functions.

[0035] Integrated antimicrobial properties: Surface coating and antimicrobial agents within the film work synergistically to extend service life. ‌1. Process refinement‌ ‌1. PVB film preparation process‌ ‌2. Refinement of the entire laminated glass process‌ step ‌Refine parameters and process points‌ Equipment / Technology Glass pretreatment - Float glass (3-12mm thick) is cleaned with pure water and ultrasonic waves (40kHz, 50°C), with a surface cleanliness of ≤5μm particles after drying. - Low-E coating is achieved by magnetron sputtering (Ar atmosphere, target material Ag / Cr, film thickness 10-20nm), with an emissivity of ≤0.1. Antibacterial treatment: Spraying of nanosilver sol (particle size 10-20nm, solid content 0.5%), with a silver loading of ≥50mg / m² after drying at 80°C. Magnetron sputtering coating machine spraying robot Sandwich assembly - Lamination order: outer glass (Low-E side facing inward) → PVB film (0.76mm) → functional film (such as sound insulation / UV layer) → inner glass - Vacuum pre-pressing: vacuum degree ≤10Pa, temperature 60-100℃ pre-pressing for 30 minutes to eliminate bubbles Vacuum laminator laser positioning platform High temperature and high pressure molding - Autoclave parameters: heating rate 2℃ / min to 145±5℃, pressure 1.5MPa for 2 hours, cooling to 60℃ and then releasing the pressure - The film flows to fill the gap, and the bonding strength is ≥5MPa Autoclave (pressure accuracy ±0.05MPa) Post-processing and quality inspection - Edge cutting: Diamond tool, chamfer 0.5-1mm, roughness ≤0.5μm - Performance testing: - UV blocking rate (280-400nm) ≥99% - Infrared blocking rate (780-2500nm) ≥95% - Antibacterial rate (Escherichia coli / Staphylococcus aureus) ≥99.9% - Impact resistance (1000g steel ball dropped 1m without breakage) UV-Vis-NIR Spectrophotometer Antibacterial Test Chamber

[0036] Example 1. Agricultural Greenhouse Glass Agricultural greenhouse glass vs traditional glass greenhouse Optimized spectral regulation: Rare earth-doped PVB film selectively filters ultraviolet rays (blocking rate ≥99%) while enhancing red light transmittance (≥95%), significantly improving crop photosynthetic efficiency. Traditional glass only achieves an average transmittance of 91.5% and has no spectral regulation capabilities.

[0037] Improved durability: The nano-silver antibacterial layer inhibits algae growth, and the hydrophobic coating reduces dust adhesion. The annual light transmittance attenuation is ≤1%. Traditional glass loses an average of 5-8% of light transmittance annually due to frost and dirt accumulation.

[0038] Energy saving and efficiency improvement: 95% infrared blocking rate reduces summer cooling energy consumption, saving more than 30% energy compared to ordinary glass greenhouses.

[0039] Example 2. Sunroom Glass Sunroom glass vs. conventional Low-E glass Dynamic thermal insulation performance: Double silver Low-E film (emissivity ≤ 0.05) combined with rare earth resonant reflection, shading coefficient SC ≤ 0.3 (conventional single silver Low-E glass SC ≈ 0.5), and U value reduced to 1.0 W / (m²·K).

[0040] Intelligent dimming expansion: The optional electrochromic layer can achieve dynamic adjustment of light transmittance from 70% to 10%, far exceeding the mechanical adjustment method of traditional sunshades.

[0041] Lightweight structure: 1.14mm thick PVB film replaces traditional laminated insulating glass, reducing weight by 20% and improving impact resistance.

[0042] Example 3. Shopping mall curtain wall glass Shopping mall curtain wall glass vs ordinary curtain wall glass Comprehensive performance breakthrough: Double-layer PVB + sound insulation film structure achieves RW ≥ 45dB sound insulation and wind pressure resistance ≥ 5kPa, while traditional laminated glass only reaches RW 35dB / wind pressure resistance 3kPa.

[0043] Fusion of aesthetics and functionality: Color glaze printing is temperature-resistant to 600°C and has a color difference of ΔE≤1.5, combining personalized design with high durability. Ordinary colored glaze glass is prone to fading.

[0044] Reduced maintenance costs: Nano-silver’s antibacterial properties reduce cleaning frequency, and the service life is estimated to be 25 years (compared to approximately 15 years for traditional curtain wall glass).

[0045] 3. Key Quality Control Nodes Raw material dispersion uniformity: The rare earth materials in the PVB film must be dispersed uniformly using SEM (spacing ≤ 500nm).

[0046] ‌Bond interface integrity‌: Use ultrasonic flaw detector to inspect the glass-PVB interface to ensure there is no debonding or bubbles (defect area ≤ 0.1%).

[0047] Environmental tolerance test: High temperature and high humidity test (85℃ / 85%RH, 1000 hours): transmittance decrease ≤ 3%, no delamination.

[0048] UV accelerated aging (QUV 340nm, 2000 hours): color change ΔE≤2.0.

[0049] ‌4. Cost and Efficiency Optimization‌ Raw material recycling: After the extrusion waste is crushed, it is mixed back into the new material at a ratio of ≤10%, reducing the production cost of PVB film.

[0050] Continuous production: The tape casting process is integrated with the laminated glass assembly line to achieve 72-hour continuous production from laminated film to laminated glass.

[0051] Energy consumption control: The autoclave adopts a waste heat recovery system, with an energy saving rate of ≥30%.

[0052] The PVB film in this solution incorporates rare earth thermal insulation materials. Rare earth thermal insulation materials absorb infrared wavelengths through the principle of ion resonance, effectively reducing the shading coefficient (SC≤0.5) and enhancing the thermal insulation effect. This solution adopts a modular design, adding different modules to adapt to different specific demand scenarios, such as supporting the addition of UV absorption layers (agricultural scenarios) and color-changing light layers (commercial scenarios). Antibacterial performance is integrated: the surface coating and the antibacterial agent in the film work synergistically to extend the service life.

[0053] The multi-film composite laminated glass design scheme, based on the structural characteristics of laminated glass, combines thermal insulation PVB film and other functional films to propose a customized glass solution with layered radiation blocking, suitable for scenarios such as sunrooms, agricultural planting or shopping mall curtain walls.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A process for producing high-insulation and radiation-proof antibacterial glass, characterized by: Including outer glass, middle functional layer, inner glass and expandable layer; The outer glass is made of ordinary float glass or ultra-clear glass, with a low-emissivity film on the surface; The intermediate functional layer is a PVB film layer containing rare earth thermal insulation material, superimposed with an antibacterial functional layer; The inner glass is a coated glass that adjusts light transmittance; The expandable layer is a functional film embedded between the PVB layers; Its production process includes the PVB film preparation process and the entire laminated glass process. The PVB film preparation process specifically includes raw material mixing, melt extrusion, cast molding and winding into rolls; the laminated glass process includes glass pretreatment, interlayer assembly, high-temperature and high-pressure molding, as well as post-processing and quality inspection.

2. The process for producing high-insulation and radiation-proof antibacterial glass according to claim 1, characterized in that: The production process specifically includes the following steps: Step A. PVB film raw material mixing: PVB resin powder, 3GO plasticizer, and rare earth insulation material are mixed to ensure uniform dispersion; Step B. PVB film melt extrusion: The mixed material is melted through a twin-screw extruder at a temperature of 160-210°C and passed through a filter to remove impurities; Step C. PVB film casting: The melt is extruded through a T-die onto a cooling roller to form a uniform film with a thickness of 0.38-1.52 mm; Step D. Winding the PVB film into a roll: After cooling and setting, rewind the film and inspect its thickness, transparency, and the absence of bubbles before setting aside. Step E. Glass pretreatment: Clean the original glass, apply a low-emissivity coating to the surface, and spray a nano-silver antibacterial coating on the glass surface. Step F. Interlayer assembly: Laminate the layers in the order of "outer glass - PVB film - functional film - inner glass" and vacuum to remove air bubbles; Step G. High temperature and high pressure molding: autoclave treatment at a temperature of 60-150°C and a pressure of 0.2-1.5 MPa for 2-4 hours to bond the PVB to the glass; Step H. Post-processing and quality inspection: Cut the edges and test light transmittance, thermal insulation performance (emissivity ≤ 0.15), antibacterial efficiency ≥ 99%, and impact strength.

3. The process for producing high-insulation and radiation-proof antibacterial glass according to claim 2, characterized in that: The specific process of mixing the PVB film raw materials in step A is as follows: (1) PVB resin powder: select powder with a degree of polymerization of 1000-1500 and a hydroxyl content of 17.0-20.0%, and pre-dry it to a moisture content of ≤1.5%; (2) 3GO plasticizer; (3) Rare earth insulation material ≤5%: cerium oxide CeO2 and lanthanum oxide La2O3 are mixed in a ratio of 3:2, with nano-particle size of 50-100nm; (4) Disperse the rare earth thermal insulation material in the 3G0 plasticizer and stir at high speed using a high-speed stirrer to prepare a dispersion; (5) The 3GO plasticizer containing rare earth thermal insulation material and PVB resin powder are weighed and continuously passed through a twin-screw extruder and a casting die in a ratio of 20%-35%:80%-65%, and then cooled, shaped, and wound to obtain a PVB film.

4. The process for producing high-insulation and radiation-proof antibacterial glass according to claim 2, characterized in that: The specific process of melt extrusion of the PVB film in step B is as follows: the twin-screw extruder is temperature-controlled in sections: zone I 160-170°C, zone II 180-190°C, zone III 200-210°C, screw speed 80-120 rpm, die pressure 10-15 MPa, melt viscosity controlled at 3000-5000 Pa·s, and the melt is filtered through a 200-500 mesh filter to remove impurities.

5. The process for producing high-insulation and radiation-proof antibacterial glass according to claim 2, characterized in that: The specific process of the PVB film casting in step C is as follows: T-die width 1.2-2.5m, lip gap adjustment accuracy ±0.01mm, cooling roller temperature 20-25°C, line speed matching extrusion volume 5-15m / min, film thickness tolerance ±0.02mm, surface roughness Ra≤0.1μm.

6. The process for producing high-insulation and radiation-proof antibacterial glass according to claim 2, characterized in that: The specific process of winding the PVB film into a roll in step D is as follows: the tension is controlled at 20-50N, the winding speed is synchronized with the casting line speed, the slitting width is customized according to customer needs by ±0.5mm, and quality inspection: infrared spectroscopy is used to detect the uniformity of rare earth dispersion, and the transmittance is ≥70% in the visible light band.

7. The process for producing high-insulation and radiation-proof antibacterial glass according to claim 2, characterized in that: The specific process of glass pretreatment in step E is as follows: float glass with a thickness of 3-12mm is cleaned with pure water and ultrasonic waves at 40kHz and 50°C. After drying, the surface cleanliness is ≤5μm particles. The Low-E film is deposited using magnetron sputtering in an Ar atmosphere with an Ag / Cr target, a film thickness of 10-20nm, and an emissivity of ≤0.

1. Antibacterial treatment is performed by spraying a nano-silver sol with a particle size of 10-20nm and a solid content of 0.5%. After drying at 80°C, the silver loading is ≥50mg / m².

8. The process for producing high-insulation and radiation-proof antibacterial glass according to claim 2, characterized in that: The specific process of the interlayer assembly in step F is as follows: stacking order: outer glass → PVB film 0.76mm → functional film → inner glass; vacuum pre-pressing: vacuum degree ≤10Pa, temperature 60-100°C pre-pressing for 30 minutes to eliminate bubbles.

9. The process for producing high-insulation and radiation-proof antibacterial glass according to claim 2, characterized in that: The specific process of high temperature and high pressure molding in step G is as follows: autoclave parameters: heating rate 2°C / min to 145±5°C, pressure 1.5MPa maintained for 2 hours, cooling to 50°C and then releasing the pressure, the film flows to fill the gap, and the bonding strength is ≥5MPa.

10. The process for producing high-insulation and radiation-proof antibacterial glass according to claim 2, characterized in that: The specific process of post-processing and quality inspection in step H is as follows: edge cutting: diamond tool, chamfer 0.5-1mm, roughness ≤0.5μm; performance testing: UV blocking rate 280-400nm ≥99%, infrared blocking rate 780-2500nm ≥95%, antibacterial rate ≥99.9%, impact resistance, 1000g steel ball dropped 1m without breakage.

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