Description
Optical Clear Adhesive(OCA) is one of the main materials for touch screen lamination. It is made of optical acrylic adhesive without a base material, and then a layer of release film is attached to the upper and lower bottom layers. It is a double-sided laminating tape without a base material . The principle of its coating process is to use a coating machine to evenly coat OCA on the product surface. It has high adhesion, high weather resistance and acid-free properties. It has low corrosion resistance to ITO and has excellent step gap filling properties. It is the best adhesive for touch screens . Its advantages are clarity, high light transmittance (total light transmittance >99%), high adhesion, high weather resistance, water resistance, high temperature resistance, UV resistance , and controlled Thickness, provides uniform spacing, and has the characteristics of small curing shrinkage. Long-term use will not cause yellowing , peeling and deterioration problems.
Optical adhesive can be used in different fields according to its thickness.
Main purpose are: electronic paper, transparent device bonding, projection screen assembly, aerospace or military optical device assembly, display assembly, lens assembly, resistive touch screen G+F+ Special adhesive used for bonding F , F+F , capacitive touch screen, panel, ICON , glass, polycarbonate and other plastic materials to bond transparent optical components (such as lenses, etc). It is colorless and transparent, has a light transmittance of over 90% , good bonding strength, can be cured at room or medium temperature, and has small curing shrinkage.
How to choose Optical Clear Adhesive(OCA)?
●Thickness and hardness of the bonding material
●Whether to bond the ITO layer
● Whether to bond PC , PMMA
● Whether the ink layer needs to be filled
● Aging resistance requirements
Features
- No bubbling, no delamination, no yellowing, no glue spillage, easy to die-cut.
- High light transmittance, the light transmittance reaches more than 95%.
- High adhesion, good waterproof effect, high temperature resistance, and good UV resistance.
- Reliable quality, no yellowing, detachment, watermarks and other characteristics will appear after long-term use.
- Easy to fit. The Optically Clear Adhesive(OCA) bonding process requires relatively simple equipment and the process is also simple. Only an OCA bonding machine and a defoaming machine are needed to complete the bonding process. Vacuum laminating machine.
- Suitable for various screen sizes.
- Reduce glare, reduce the loss of light emitted by the LCD, increase the brightness of the LCD and provide high transmittance, reducing energy consumption.
- Increase contrast, especially under bright light.
- Surface connections have higher strength.
- No borders, expanded viewing area.
- Resistant to UV light, non-yellowing, high weather resistance, water resistance, high temperature resistance, UV resistance, no delamination or degradation.
- Acid-free, colorless, high cleanliness, high transparency, almost does not affect the brightness and tone of the screen.
- The appearance and shape of the optical glue can be adjusted according to the design. It has its own adhesive properties and can be bonded at room temperature.