Dontech uses a variety of optical bonding materials and adhesive systems to meet a broad range of performance criteria. There is no chemistry or system that works best for all applications. Depending on the application, silicone, epoxy, or acrylated urethane wet chemistries, or silicone or acrylic dry bond systems may offer the best properties. All these systems and chemistries have attractive optical properties and are viable options to consider. Most glass and plastic optical filters, displays (LCDs & OLEDs), and touchscreens have front and rear surface materials with a refractive index between 1.4 and 1.7. For this reason, adhesives used for optical bonding have an index of refraction within this range. The most common formulations are centered around 1.5.
Bonding systems and chemistries are selected to address a range of performance and production factors including cure method, bond geometry including thickness, environmental demands (e.g., altitude, temperature range, shock, and vibration), substrate surfaces, bond stress, cost, and an ability to be reworked. Dontech chemistries are as follows:
Wet Systems
Dry Systems
Dontech develops custom formulations for specific display applications and bonding mechanical configurations (e.g., over-frame, under-frame, and rear-surface display bonding). The proper optical bonding adhesive system and chemistry is dictated by the application, including the type and surface treatment of the display, mechanical configuration, display bonded components, thermal range, optical performance, cost criteria, and other design concerns.
Dontech has extensive engineering and technical support resources that can assist you with your optical bonding material design needs. Our technical staff have diverse backgrounds relevant to high-performance display and precision optics markets. For many of our top customers, we function as an extension of their engineering departments, supporting projects from concept to final system delivery. We will integrate our optical filters and other enhancing components into touchscreens, displays, and systems to the level that is needed by our customers.
Dontech’s Quality Management System is AS9100D and ISO-9001:2015 certified with TUV Rheinland of North America. We are a designer and manufacturer of optical filters, laminations, and thin film coatings for the precision optics, display, and touchscreen markets.
Since 1971, we have designed and manufactured custom components that enhance the performance of optical systems from concept to final system delivery.
