In the photo-curing formulation system, apart from UV resins and photoinitiators, UV monomers also serve as a vital component. UV monomers not only adjust the viscosity of the system but also impart or enhance different properties of the cured film, such as enhancing adhesion, improving flexibility, and increasing wear resistance. Therefore, the rational use of various monomers is also an important link in formulation design.

As the name suggests, bifunctional UV monomers are molecules containing two reactive functional groups that participate in photopolymerization reactions. These functional groups are typically acrylates or methacrylates, with acrylates dominating the current market due to their superior reactivity and cost-effectiveness. Compared to their monofunctional counterparts, bifunctional UV monomers offer several advantages: Faster curing speed,Higher crosslinking density in the cured film,Good dilution properties,Reduced volatility and lower odor.

Monofunctional UV monomers refer to those containing only one group capable of participating in the curing reaction per molecule. The types of functional groups include acrylates, methacrylates, vinyls, vinyl ethers, epoxies, etc.

LCD photocuring 3D printing technology, also known as Mask Stereolithography (MSLA), is an emerging additive manufacturing technology. Similar to SLA and DLP technologies, LCD photocuring also solidifies liquid resin via light exposure, but its uniqueness lies in the use of an LCD screen to control the light source. This technology utilizes the imaging principle of liquid crystal displays, where computer programs provide image signals to generate selective transparent regions on the LCD screen. Under UV illumination, the light passing through these transparent areas forms UV image regions, solidifying the liquid resin exposed to them, while areas blocked by the LCD remain uncured. This process is performed layer by layer based on the predefined 3D model, with cured resin layers accumulating to build the final three-dimensional object.