Classification of OCA optical adhesives

OCA (Optically Clear Adhesive) is a material used to enhance the adhesion between the surfaces of transparent objects. It is often used in electronic devices such as smartphones, tablets, and laptops to achieve better display effects and stronger durability. According to different application requirements and technical characteristics, OCA optical adhesives can be divided into the following categories: One Side OCA Optical Adhesive: This type of OCA optical adhesive only has adhesion on one side and is usually used to fix touch screen panels or protect glass onto displays. Due to the stickiness on only one side, it is easier to operate and less likely to cause contamination during the assembly process. Two Side OCA Optical Adhesive: Double Side OCA optical adhesive has adhesion on both sides and is suitable for situations where two surfaces need to be connected simultaneously. For example, it is used when tightly fitting the display screen with the outer glass. Double sided OCA can provide a stronger bond and help reduce air gaps, thereby improving image quality. UV Curable OCA Optical Adhesive: This type of OCA optical adhesive requires UV irradiation to solidify. By controlling the intensity and time of ultraviolet radiation, the curing speed and degree can be adjusted, making the processing process more flexible and controllable. In addition, UV cured OCA also has the characteristics of environmental protection and solvent-free, which is in line with the pursuit of sustainable development in modern manufacturing industry. Heat Curable OCA Optical Adhesive: Similar to UV curing, heat curable OCA optical adhesive solidifies under specific temperature conditions. This type of OCA is suitable for components that are not suitable for exposure to high-energy radiation or applications that require long-term heating treatment. Moisture Curable OCA: This type of OCA optical adhesive does not require an external light or heat source to cure, but rather achieves a curing reaction by absorbing moisture from the atmosphere. This feature makes moisture cured OCA very convenient to use without the need for complex equipment conditions. Pressure sensitive OCA optical adhesive: Pressure sensitive OCA optical adhesive can generate adhesive force immediately after applying pressure and maintain its adhesion after releasing pressure. This type is widely used in scenarios that require immediate installation, such as temporary repairs or rapid assembly of production lines. Anti Reflective Coating OCA: In order to further improve the visibility and contrast of displays, some OCA optical adhesive products will add anti reflective coating technology. This not only reduces the reflection of ambient light, but also effectively improves the clarity and brightness performance of the screen when viewed from different angles. Hydrophobic/Oleophobic Coated OCA: With the increasing demand of consumers for easy maintenance of electronic products, many manufacturers have begun to use OCA optical adhesives with anti fouling, hydrophobic, or oleophobic properties in their products. These coatings can prevent fingerprints, grease, and other pollutants from adhering to the screen surface, keeping the device clean and beautiful. The selection of the appropriate type of OCA optical adhesive depends on the specific application scenario and requirements. Manufacturers need to comprehensively consider factors such as product performance indicators, feasibility of production processes, and costs to ensure that the final product meets market demand and is competitive.