OCA (Optically Clear Adhesive) It is made of non-substrate optical acrylic pressure-sensitive adhesive, and then a layer of optical release film is attached to the upper and lower bottom layers to make a double-sided tape by lamination machine. A double-sided tape with adhesive laminating; OCA has the advantages of high cleanliness, high light transmittance,adhesive laminating, high adhesion, no crystal points, no bubbles, water resistance, high temperature resistance, UV resistance, etc., and Long-term use will not cause problems such as yellowing, aging, fogging, separation from the adhered surface by lamination machine, and blistering.According to customer requirements, we can place OCA+acrylic (or PC) on the adhesive laminating back of the membrane switch to harden the window glue laminating machine by lamination machine