Industry info - OCA bonding VS. OCR bonding
Time:2023-02-27
Views:1727
Before exploring the properties that optically clear adhesives (OCA) or optically clear resins (OCR) must have, it is important to note that light is refracted or reflected when it comes in contact with a surface of a different material. Refraction of light can occur in displays too when there are air gaps inside the product or light meets cover windows in the way, which reduces visibility. To minimize reflecting lights, optically clear adhesives (OCA) or resins (OCR) with similar refraction index are used to eliminate air gaps within display products.
What Is OCA?
OCA is made of optical acrylic adhesive without a substrate, and then a layer of release film is attached to the upper and lower bottom layers. It is a double-sided adhesive tape without a substrate. Its excellent clarity, high light transmittance (total light transmittance> 99% or more), high adhesion, high weather resistance, water resistance, high temperature resistance, UV resistance, long-term use will not produce yellowing.
What Is OCR?
OCR Optical Clear Resin is a special adhesive designed for bonding transparent optical components. The optically transparent resin can fill the gap between the panel and the transparent protective layer and the liquid crystal module to improve the contrast of the display. Compared with the traditional air gap method, this optical resin can suppress light scattering caused by external light and backlight. The optically transparent resin formed by rapid response to UV irradiation has a refractive index and light transmittance similar to glass, resistance to yellowing, softness, and can withstand the expansion and contraction rates of a variety of different substrates, so that it can withstand high and low temperature changes during lamination problem.
Application:
Used for electronic paper, transparent device bonding, 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 others Bonding of related electron optics.
