Acrylic Mirror Surface Hardening Technology

　　Surface chemical treatment primarily utilizes methods such as lasers to induce alterations in the surface structure of the板材. 
　　However, acrylic is still a type of plastic, and its hardness falls significantly short of that of glass. Therefore, acrylic mirrors require extra care during daily use, as they are highly susceptible to scratches. To address this issue, the surface of acrylic mirrors undergoes a special treatment—what we commonly refer to in our industry as "acrylic surface hardening technology." 
　　Acrylic mirror surface hardening technologies are primarily categorized into three types: 
　　1. Surface Coating Hardness Modification 
　　Surface coating hardness modification is what we commonly refer to as surface hardening treatment (Hardcoating). This process involves applying a high-hardness material onto the surface of acrylic sheets, thereby enhancing the surface hardness of the material. Commonly used coating materials include inorganic substances, organosilicon coatings, fluorocarbon paints, polyfunctional acrylates, and a small amount of thermosetting resins. Based on their bonding characteristics, surface coatings can be further categorized into physical coatings and chemical coatings. Physical coatings rely solely on Van der Waals forces between the thin film and the sheet surface for adhesion, whereas chemical coatings form stronger chemical bonds through cross-linking reactions between the coating molecules and functional groups present in the side chains of the sheet material. As a result, chemical coatings exhibit superior adhesion and greater durability compared to physical coatings. 
　　2. Surface Coating Treatment 
　　Surface coating treatment (typically completed using PVD technology), primarily involves applying metals, metal oxides, or other inorganic materials onto the surface of acrylic mirror panels via PVD methods. 
　　PVD stands for Physical Vapor Deposition, an English term referring to a process conducted under vacuum conditions. It employs low-voltage, high-current arc discharge technology, utilizing gas discharge to vaporize the target material and simultaneously ionize both the vaporized substance and the surrounding gases. Under the acceleration of an electric field, the vaporized materials and their reaction products are deposited onto the workpiece. Films prepared via PVD exhibit notable advantages, including high hardness, low friction coefficient, excellent wear resistance, and superior chemical stability. 
　　3. Surface Chemical Treatment 
　　Surface chemical treatment primarily employs methods such as lasers to induce changes in the surface structure of the. 
　　The surface hardness of acrylic mirror panels is indicated by the H value, which generally refers to their resistance against scratches. Typically, standard acrylic mirror panels achieve a surface hardness level of around HB to 2H. However, after undergoing surface hardening treatment, the hardness can be significantly improved, reaching levels of 6H to 8H. A higher H value signifies greater surface hardness of the material. 
　　However, due to the relatively high cost of surface hardening technology and the fact that the current hardness requirements for acrylic can already meet the needs of a wide range of customers, currently, except for customers with particularly high hardness demands, surface hardening treatment is rarely applied to acrylic mirror panels during production. 
　　Although there are various methods available to modify the surface hardness of acrylic mirror panels, when it comes to maintaining the original optical properties and other advantages of acrylic mirror panels after surface hardening treatment, the surface coating process—primarily composed of silicone with the addition of minor amounts of metal oxides and other auxiliary agents—currently remains the preferred method for surface hardening of PMMA/PC sheets. 
　　A surface hardening layer is obtained by spraying a curing solution onto the acrylic mirror panel surface using a spraying device, followed by baking.