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OCA optical adhesive, also called OCA optical transparent adhesive, is a kind of optical double-sided lamination composed of optical acrylic adhesive without substrate, and a layer of release film on the upper and lower sides. tape.
1. The upper release film and the lower release film (because the release force is different from the optical colloid, it is generally called light release film and heavy release film) membrane). Because of the use of optical adhesives, the upper and lower release films are matched with optical grade release films, which have much higher light transmittance than general release films. In terms of the thickness of the upper and lower layers of optical-grade release film, the general thickness of the upper release film (light release film) is 50um, 75um, and the lower release film (heavy release film) is 75um, 100um, etc. thickness.
2. Optical colloid, the main material of which is optical acrylic adhesive (or acrylic optical adhesive), with a light transmittance of 99%. Because of its different applications, there are different thicknesses: 75um, 100um, 125um, 150um, 175um, 200um, 250um, etc. The cut surface of the release film material must also not have hairs or dander; the overall release film surface must not have dirt and foreign matter; there must be no scratches; high cleanliness and high flatness are required.
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