Norland UV-curable optical adhesive NOA68 ---- adhesive against the surface of the plastic, glass and metal also has good adhesion, and can be used to bond the mixture of the three materials. Temperature up to 125 ° C ...... Norland UV curing the optical glue NOA68 is a clear, colorless liquid photopolymer cured under UV irradiation. Because it is a single-component curable adhesive is 100% entities, as long as the bonding surface can be irradiated with ultraviolet light, in the adhesion of the optical member, it became apparent to many outstanding advantages. NOA68 adhesive eliminates the need for the other optical adhesive systems usually require pre-mixing, dry or heat curing operation. And curing speed, depending on the application thickness and applying ultraviolet light energy. NOA68 gum is a modified adhesive for a variety of plastic, plastic surface such as: polycarbonate, acrylic acid, acetic acid - butyrate. In addition to plastic, NOA68 adhesive in bonding the glass and metal also has good adhesion, and can be used three kinds of materials of plastics, glass, metal bonded together. NOA68 adhesive composite plastic lens, the overburden pressure polarizing film between the glass or plastic, the plastic lens is adhered to a metal or plastic frame, and bonding appearance glass is recommended. NOA68 is cured by ultraviolet light, the fully cured recommended energy 4.5 Joules / square centimeter long wavelength ultraviolet light, having a maximum absorption at 350nm-380nm. Most of the glass and a variety of transparent plastic can penetrate in the wavelength range of ultraviolet light, even a small portion of a transparent plastic containing a UV absorber. Reduce or isolated ultraviolet absorbent Council, slow down or prevent the curing. Design to note that the system must have at least the midst of the substrate can penetrate a UV light to cure the adhesive. The light source can be used to cure the binder sunlight, mercury lamps and fluorescent blacklight. Completely cured NOA68 has a very strong adhesion and solvent resistance, but has not yet reached the top of the glass bonding effect. After 1 week of aging, forming a chemical bond between the glass and the adhesive that will form the top adhesive. Aging 12 hours at 50 ° C temperature conditions for optimum bonding. After aging, the glass adhesive can be subjected to the temperature change from -80 ° C to +90 ℃ adhesive may be subjected to a temperature change from -15 ° C to +60 ℃, glass and plastic and without aging. In some cases, when the adhesive is used as a film or coating, may be subjected to a high temperature of 125 ° C, it depends on the specific application. NOA68 adhesive material can be separated with a chlorine-based solution (e.g., methylene chloride). Typically, if only in the pre-cured, the adhesive surface immersed in a solvent one night can be separated. The longer time vary depending on the size of the area of ??the degree of curing and curing. Care must be taken: methylene chloride may be invaded bad plastic.