Loctite® Liquid Optically Clear Adhesives Advance Touch Panel and Display Assembly
One Henkel Way
Rocky Hill, CT, 06067
Press release date: June 11, 2012
Dual Cure, Low Shrinkage Technologies Control Mura; General-Purpose LOCAs Absorb Impact, Allow Thinner Designs
Rocky Hill, Conn. - As touch panel interfaces become the norm on mobile devices, laptops and tablets, LoctiteŽ Liquid Optically Clear Adhesives (LOCA) from Henkel Corporation are improving the viewing experience, increasing display durability, extending product life, reducing power consumption and enabling thinner device designs. New dual cure technologies allow full cure in shadowed areas, and offer vastly reduced shrinkage to control display distortion and eliminate mura.
When used on AR glass, LoctiteŽ LOCA products increase the contrast ratio in sunlight by 400 percent and minimize the refractive index mismatch to glass and PMMA, minimizing light loss due to reflection. Reduced light loss means the user enjoys a superior viewing experience and the device consumes far less power, which extends battery life. LoctiteŽ LOCA products increase display robustness significantly; for example, LOCAs can increase ball-drop impact resistance as much as 300 percent for gaps up to 1 mm. And displays withstand higher heat and humidity, and resist temperature cycling. As they absorb impact load and protect gap-free display surfaces, these adhesives allow the production of thinner panels.
The seven products in the LoctiteŽ LOCA line include two dual cure adhesives designed to cure in shadowed area where light cannot reach. LoctiteŽ 5192(TM) 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. LoctiteŽ 3192(TM) 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 80şC.
Designed for both TP1 (touch panel to cover lens) and TP2 (cover lens to LCD) bonding, LoctiteŽ 3196(TM) is a general-purpose, impact-absorbent UV acrylic that protects the display surface from damage. This unique adhesive can also replace the air gap designed into TP2 applications. UV cure LoctiteŽ 3193(TM) delivers high adhesion to plastic, while LoctiteŽ 3195(TM) is a general-purpose adhesive for TP1 glass-to-glass bonding. LoctiteŽ 3195DM(TM) is a high viscosity dam material compatible with most UV acrylic LOCAs. LoctiteŽ 5192DM(TM) is a high viscosity silicone dam material designed for use with LoctiteŽ 5192(TM) UV/moisture cure silicone.
LoctiteŽ LOCAs provide better adhesion and reliability than optically clear double-sided tapes, are more suitable to large panel assembly, and are much better for gap filling. Compatible with many display and touch panel sizes, LOCAs eliminate the need to inventory die-cut OCAs in varying sizes. LOCA products can be applied and cured using automated processing equipment with little surface preparation. Repair and rework is done during pre-curing phases of the assembly process.
For more information on LoctiteŽ LOCA adhesives and dispensing/curing equipment or to download a copy of the LoctiteŽ LOCA brochure, go to www.henkelna.com/loca.
Henkel operates worldwide with leading brands and technologies in three business areas: Laundry & Home Care, Cosmetics/Toiletries and Adhesive Technologies. Founded in 1876, Henkel holds globally leading market positions both in the consumer and industrial businesses with well-known brands such as Persil, Schwarzkopf and Loctite. Henkel employs about 47,000 people and reported sales of $21.7 billion and adjusted operating profit of $2.8 billion in fiscal 2011. Henkel's preferred shares are listed in the German stock index DAX and the company ranks among the Fortune Global 500.
One Henkel Way
Rocky Hill, CT 06067
Tel: 1-800-LOCTITE (562-8483)