Loctite® Liquid Optically Clear Adhesives (LOCA) improve the viewing experience, increase display durability, extend product life, reduce power consumption and enable thinner device designs. New dual cure technologies allow full cure in shadowed areas, and offer reduced shrinkage to control display distortion and eliminate mura.
When used on AR glass, these products increase the contrast ratio in sunlight by 400% and minimize the refractive index mismatch to glass and PMMA, minimizing light loss due to reflection. Also, LOCAs can increase ball-drop impact resistance as much as 300% for gaps up to 1 mm. And displays withstand higher heat and humidity, and resist temperature cycling.
The seven products in the line include two dual cure adhesives designed to cure in shadowed area where light cannot reach. Loctite® 5192™ is a high-temperature-resistant, non-yellowing UV/moisture cure silicone that shrinks very little and contributes minimal stress to the surface of the LCD, reducing mura defects. Loctite® 3192™ is a general-purpose UV/heat cure acrylic with a refractive index that delivers excellent brightness, clarity and color. Ideal for high volume production, this product heat cures in just one minute at 80°C.
Filed Under: Adhesives • epoxies, Design World articles, Materials • advanced