LOCA: Liquid Optical Adhesives for Display Assembly 

Controls for electronic and electrical products used in consumer and industrial markets are rapidly converting to display and touch screen panel (TSP) technologies. Ease of use and cost are two major drivers for the change.

Production efficiency and higher throughput are always high on manufacturer’s “wish lists”. For bonding technology leaders like Panacol-USA, it becomes imperative to develop faster curing, liquid optically clear adhesives (LOCA) that can be produced in a range of viscosities to accommodate the numerous production processes associated with display and touch screen panel assembly. Panacol-USA’s optically clear adhesives are solvent-free, single component, and cure in seconds under low intensity UV or Visible light. They can be seamlessly integrated into existing production lines to quickly maximize their contribution to increased productivity.

Panacol-USA manufactures optically clear coupling adhesives for attaching glass and polymer-based touch screen panels. They possess extreme softness, clarity, flexibility, and resistance to thermal cycling. In addition, the adhesives’ flow properties and ability to minimize air entrapment eliminate ripples, providing optimal image transmission.

LOCA adhesives featuring a dual curing component which reacts to atmospheric moisture are also available. Thus shadow zones within the display frame can also be cured reliably.

Liquid optically clear adhesive from Panacol-USA improves clarity of displays

UV curing equipment:

UV system solutions with Panacol uv adhesives and innovative curing systems from Honle, both available from Panacol-USA

View the display/touch screen panel assembly adhesives listed below for a possible candidate for your application. 

LOCA Adhesives: Viscosity [mPas] Base Curing* Properties
Vitralit® 50004 50-200 acrylate UV
low shrinkage
fast curing
optically clear
Vitralit® 5140 VT 5,000-10,000 (Rheometer, 25°C, 10s^-1) acrylate UV
High resistance to thermal stress and moisture
Flexible and stable
Low shrinkage, optically clear
Joining dissimilar subjects
Vitralit® UD 8540 1,800-3,200 (Rheometer, 25°C, 10s^-1) acrylate UV
secondary moisture cure
optically clear
low shrinkage
dual curing
Vitralit® CIPG 60102 15,000-40,000 (Rheometer, 25°C, 10s^-1) acrylate UV
Flexible/elastic liquid gasket,
high resilience,
easy to apply,
fast curing with UV light
Vitralit® VBB 1 Gel 12,000-30,000 acrylate UV
high peel strength
optically clear
very flexible
stable gel
Vitralit® 50000 20-80 acrylate UV
Adheres to a variety of substrates including metal, ceramic, glass and many plastics
Extremely soft and flexible
Tack-free surface
Low shrinkage
High photosensitivity, curing with low intensive lamps
Low shore hardness
Vitralit® 50001 40-60 acrylate UV
Adheres to a variety of substrates including coated glass, metals, PET, and other plastics and films
High strength
Full re-workable
Water-like viscosity
Fast filling of cavities without air entrapment
Low shrinkage, less residual stress

*UV = 320 - 390 nm          VIS = 405 nm

To download the technical datasheets (TDS) please click on the adhesive name.