UV curing adhesives now have an established share of the adhesive market 1,2]. A distinction is made between radical curing systems, most of which are based on acrylates, and cationic curing systems, which are mostly based on epoxides 3,4].
The first UV unit worldwide for the cross-linking of UV curable hotmelt acrylates was put into operation at HERMA in Germany in 1995. Already one year earlier, tests had been carried out under production conditions in order to obtain first results with hotmelt acrylates.
Solvent-free pressure-sensitive adhesive (PSA) technology is a relatively new generation of industrial technology that allows the manufacture of a new class of self-adhesive technical and medical products.
New quick-set 2K UV laminating systems have been developed and advantages are described. This new breed of laminating adhesives filled in the gap between traditional polyurethane systems (solvent based and solventless) and conventional UV/EB laminating adhesives.
State-of-the-art technology today stands for bonding as the joining technique in construction and connection technology for fibre and integrated optical sensors. Therefore, mainly commercially available adhesive systems are used.
K. Dake, E. Montgomery, Y.C. Koo and M. Hubert, 2003 Conference
The development of high power short wavelength light emitting diodes (LED) in the late 90s created the potential of a solid state ultraviolet/visible curing source. The benefits of LEDs are low heat, portability and low power consumption.
A broad and novel array of UV-curable pressure-sensitive adhesives from Henkel now combine many of the virtues of familiar water- and solvent-based adhesives formulations plus the advantages of hotmelts.