Page 13 - Industrial Technology EXTRA - 27th April 2020

l Excellent adhesion properties. The numerous medical applications for UV curing adhesives
l Wide range of viscosities from ultra-low to include chest drains, syringe needle bonding, catheter
thick gel. tube/bag sets and blood filter housings
Epoxy-based UV adhesives tend to be used as
coatings – for example as a ‘glob top’ protective Selecting the correct UV light curing equipment
coating to protect chips on PCB’s, conformal for your specific application is also critical to the
coatings on PCB’s, dome coating on badges, success of your production. In the main, there are
protecting wire contacts on PCB’s or as an adhesive two types of UV light curing systems – high pressure
for SMD attachment. The benefits of epoxy based gas discharge lamps or LED lamps. Acrylic and
UV adhesives are: epoxy based adhesives can be cured with either
l Have superior environmental resistance. system. Some special acrylic adhesives can be
l Wider operating temperature range. cured using high intensity visible light 405-420nm
l Low ionic and alkali content. for example when bonding UV impermeable PC or
l Low shrinkage giving better positioning and laminated glass. Others, particularly in electronic
minimal movement. PCB applications may require a combination of UV
l Cure to a tack-free dry finish. light and heat to cure the areas in shadow
Getting It Right underneath SMD’s. But the vast majority can be

April 2020 • INDUSTRIAL TECHNOLOGY EXTRA! • p13