OCA (Optically Clear Adhesive) for bonding a transparent optical element (such as lens) special adhesive. It has the characteristics of colorless and transparent, light transmittance above 90%, good bonding strength, and can be cured at room temperature or medium temperature, and has the characteristics of small curing shrinkage.
OCA optical adhesive is one of the important raw materials of touch screen. The utility model is characterized in that the optical acrylic adhesive is made into a non substrate, and then the upper and the lower layers are laminated with each other. It is the best adhesive for touch screen.
It has the advantages of clarity, high light transmittance (optical penetration rate >99%), high adhesion, high weatherability, water resistance, high temperature resistance, anti ultraviolet, controlled by the thickness, provides uniform spacing, long time use will not produce chlorosis (yellowing), peeling and modification.
OCA optical glue is divided into two categories, one is the resistance type, one is capacitive, resistive optical adhesive according to different thickness can be divided into 50um and 25um, the optical glue capacitor is divided into 100UM, 175um, 200um, 250UM.
According to the different thickness of OCA optical glue can be used in different areas, the main purpose for the electronic paper, transparent adhesive device and a projection screen assembly, aerospace or military optical device assembly, display assembly, lens assembly, resistive touch screen, G+F+F F+F capacitive touch screen panel, ICON and glass and polycarbonate etc. The plastic material used for laminating a transparent optical element (such as cemented lens etc.) special adhesive. It has the characteristics of colorless and transparent, light transmittance above 90%, good bonding strength, and can be cured at room temperature or medium temperature, and has the characteristics of small curing shrinkage. Silicone rubber, acrylic resin and unsaturated polyester, polyurethane, epoxy resin and other adhesives can be bonded optical components. In order to improve the optical properties or reduce the curing shrinkage, some treatment agents should be added. Suitable for fixed mobile machine display peripheral various film, screen (acrylic acid, glass screen, touch screen, etc.)
In short, OCA is a layer of special optical transparent double-sided adhesive!