The supply of acid optical gum, Features: acid-free, colorless, high purity, high transparency. OCA optically transparent adhesive is a kind of optical acrylic plastic made without the substrate, and then up and down the bottom, and then laminating a layer away from the film, is a substrate material double-sided laminating tape. Optical adhesive has excellent light transmittance, high adhesion, temperature resistance, moisture resistance, long durability and sealing performance good.