OCA optical adhesive is one of the important raw materials, touch screen, the advantage of clarity, high light transmittance (full light transmittance> 99%), high adhesion, high weatherability, water resistance, high temperature, UV, controlled thickness, to provide uniform spacing, prolonged use of yellowing (yellowing), peeled and deterioration will not occur. Use OCA optical adhesive role: 1, to reduce glare and reduce the loss of light emitted LCD, the LCD increases the brightness and to provide a high transmittance, to reduce energy consumption; 2, increase contrast, especially the contrast under bright light; 3, surface connection has a higher strength; 4, to avoid Newton's rings; 5, the product surface is more smooth; 6, no boundaries, expand the visible area of ??how to choose a oca optical glue, adhesive material thickness, hardness 2, whether bonding ITO Layer 3 is bonded PC, PMMA 4, if needed filling ink layer 5, the anti-aging process require a touch screen bonding causes of a bad product, OCA film and FILM bonding process, handmade stickers, pressure is not both, and folds bubbles Second, OCA film and FILM fit during a heated covered with foil machine, because expansion is not the same produce air bubbles and rolling process, uneven heating, and discontinuity all bubbles, this bubble, put bubble machine in addition to the bubble, had little effect. Third, the nip between FILM with PMMA or glass, most plants are using a combination of vertical compression machine, and heating, pressure The air can not be ruled out, this is very easy to produce bubbles, and in addition to bubble, the role is not large. Fourth, capacitive screen, the upper and lower layers are hard, generally fit, hand stick, or a combination of vertical pressure heating machine posted the results above. Fifth, the panel fit, process, hand stickers, because of uneven pressure The formation of bubbles. Six panel lamination process, with a non-servo-controlled laminating machine, cylinder and mechanical wear or loose deviations