Optically Clear Adhesive (OCA) is a transparent bonding material designed for full lamination of display modules. It is used to bond optical components such as cover glass, touch sensors, and LCD/OLED displays.

In addition to providing adhesion, OCA also plays an important role in optical performance, lamination stress management, gap filling, and long-term reliability. GTA Material’s OpticPB® series offers a range of solutions for automotive displays, industrial displays, outdoor displays, and e-paper applications, including high-temperature resistance, low modulus, outgas dissipation, UV-cut, and thick adhesive options.

Core Functions of OCA

① Optical Performance
Reduces interfacial reflection and scattering to improve display readability.

② Mechanical Performance
Low-modulus design helps absorb lamination and thermal expansion stress, reducing MURA and rainbow effects.

③ Processability
Provides gap-filling capability, good conformability, and outgas dissipation.

④ Reliability
Designed to withstand high temperature, high humidity, thermal shock, and UV exposure.

OCA Product Selection Guide