Adhesives Magazine

DYMAX: Color-Changing Adhesive (6/15/09)

June 15, 2009


DYMAX 3-20794 is a new See-Cure, color-changing adhesive formulated with Ultra-RedTM fluorescing technology. This adhesive is designed for rapid assembling of plastic housings, laminations, and other applications typically used for appliance assembly. Bondable substrates include PC, PET, PS, PU, PVC, and ABS. DYMAX 3-20794 cures in fractions of a second when exposed to high-intensity UV light, such as that produced by the DYMAX BlueWave® 200 Spot Lamp, enabling faster processing, greater output, and lower assembly costs.

This adhesive is formulated with DYMAX’s exclusive See-Cure technology. 3-20794 starts out bright blue in color in its uncured state, making it easy to see on the surface of substrates, in deep wells, or when sandwiched between two layers of materials. Because the blue color is extremely visible, simple vision systems can be incorporated into assembly processes prior to curing in order to easily identify adhesive coverage and profile, resulting in greater efficiency and less scrap.

See-Cure’s blue color in 3-20794 is only temporary. The blue color disappears when sufficient light energy has been provided to the adhesive bond area to achieve full cure. As the adhesive cures, the blue within the adhesive fades and ultimately turns clear upon full cure.

The Ultra-RedTM fluorescing feature allows this adhesive to be visually detected when exposed to low-intensity black light (365 nm) before and after it has been cured as an additional quality control option. Ultra-Red fluorescing technology formulated into DYMAX UV adhesives provides a vivid contrast that permits accurate bond-line inspection. The red fluorescence does not absorb the same light energy wavelengths as those used to cure the adhesive, resulting in faster and deeper cures when compared with the same adhesives containing blue fluorescence.

For more information, visit www.dymax.com.cn.