Display Bonding

With the ever increasing digitalization in all areas of our lives, more and more displays and touch screens are being used. In addition to smartphones, tablets and television screens almost every modern household appliance including washing machines, dishwashers, and refrigerators nowadays feature a display.

The requirements for high end displays are high: Reading must be comfortable, they must be shatter-proof, and they must maintain their clarity for the life of the products. This is particularly challenging for displays in cars and smartphones or cameras as they are expected to be non-yellowing despite the influence of sunlight and other climate stresses. Specially formulated optical adhesives from Panacol are designed to be optically clear and non-yellowing (LOCA=liquid optically clear adhesives). They are flexible enough to provide the ability to intercept thermal stresses between dissimilar substrates and to reduce Mura defects. The adhesives exhibit excellent adhesion to ITO coated glass, PMMA, PET, and PC and cure within seconds under UV irradiation. Dual curing adhesives are available which react to atmospheric moisture and will cure reliably in shadowed zones within the display frame.

To protect displays from external influences such as atmospheric humidity, dust and cleaning agents Panacol form-in-place-gaskets (FIPG) can be used for simultaneous bonding and sealing of displays and touchscreens.

LOCA adhesives from Panacol for serial display lamination | © Panacol

Panacol LOCA adhesives for manufacturing
and bonding of displays

The table below lists a selection of optically clear adhesives from Panacol that are suitable for optical bonding and sealing.

LOCA adhesive Application Viscosity [mPas] Base Curing*
Vitralit® 50004 display bonding 50-150 acrylate UV
VIS
Vitralit® 5140 VT encapsulation of electronic components
display sealing
plastic bonding
plastic film lamination
medical technology
potting material
shear thinning acrylate UV
VIS
Vitralit® UD 8540 display bonding
display lamination
1,800-2,500 acrylate UV
VIS
moisture
Vitralit® FIPG 60102 potting material
display sealing
shear thinning acrylate UV
VIS
Vitralit® VBB 1 Gel attaching components on PCBs
SMD assembly
glass bonding
display sealing
display encapsulation
plastic bonding
potting material
150,000-190,000 acrylate UV
VIS

*UV = 320 - 390 nm          VIS = 405 nm