Excimer Systems
GEW excimer lamps produce vacuum ultraviolet radiation for a range of applications and can be seamlessly integrated onto machinery up to 2.55m wide.
GEW’s ExciRay lamp systems utilise dielectric barrier discharge (DBD) lamps to produce quasi-monochromatic vacuum ultraviolet radiation, typically at 172nm. This radiation is commonly used for mattification of surface coatings, modification of surface tension for improved adhesion or surface cleaning for semiconductor and medical industries.
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GEW’s ExciRay lamp systems utilise dielectric barrier discharge (DBD) lamps to produce quasi-monochromatic vacuum ultraviolet radiation, typically at 172nm. This radiation is commonly used for mattification of surface coatings, modification of surface tension for improved adhesion or surface cleaning for semiconductor and medical industries.
Other Products and Services from GEW (EC) Ltd
E2C
The most popular air-cooled UV curing system in the world − over 30,000 units installed.
E2C is GEW’s most popular UV dryer with over 30,000 units installed worldwide. Fully air cooled, it delivers unparalleled curing performance up to 140W/cm due to patented ultra-efficient reflector designs. No similar product delivers more curing performance at this energy level.
Perfect for use on any machine up to 60cm in width, E2C supports printing on the widest range of heat-sensitive materials because our actively air-cooled reflectors reduce heat transfer to the substrate. It also boasts GEW’s renowned quick-change cassette design enabling a new lamp to be fitted in under 2 minutes with only one hex key tool required.
E2C is GEW’s most popular UV dryer with over 30,000 units installed worldwide. Fully air cooled, it delivers unparalleled curing performance up to 140W/cm due to patented ultra-efficient reflector designs. No similar product delivers more curing performance at this energy level.
Perfect for use on any machine up to 60cm in width, E2C supports printing on the widest range of heat-sensitive materials because our actively air-cooled reflectors reduce heat transfer to the substrate. It also boasts GEW’s renowned quick-change cassette design enabling a new lamp to be fitted in under 2 minutes with only one hex key tool required.
Quartz Window
A quartz glass plate which is transparent to UV energy, fitted over the UV lamphead’s emitting window.
In the majority of cases it is best to have a direct path of radiation from the UV lamp to the target area to maximise the curing effect. However, in some cases, the application necessitates a quartz glass filter to be installed in the lamp’s emitting window.
In the majority of cases it is best to have a direct path of radiation from the UV lamp to the target area to maximise the curing effect. However, in some cases, the application necessitates a quartz glass filter to be installed in the lamp’s emitting window.
Inert Gas Curing
Oxygen inhibits the UV curing mechanism. GEW’s inert gas chambers efficiently remove oxygen and improve the curing process. Find out more below:
Under normal atmospheric conditions, oxygen reacts with photoinitiators in the ink after they are exposed to UV light. This renders some of them inactive and limits the extent of polymerisation that can occur. The coating is then poorly cured or the process is forced to run much slower. This is where inert gas curing comes into play.
Curing under an inert atmosphere eliminates oxygen and significantly increases the rate and extent of cross-linking. Curing speeds are greatly improved, migration of harmful materials is reduced and the finished product odour is better.
Under normal atmospheric conditions, oxygen reacts with photoinitiators in the ink after they are exposed to UV light. This renders some of them inactive and limits the extent of polymerisation that can occur. The coating is then poorly cured or the process is forced to run much slower. This is where inert gas curing comes into play.
Curing under an inert atmosphere eliminates oxygen and significantly increases the rate and extent of cross-linking. Curing speeds are greatly improved, migration of harmful materials is reduced and the finished product odour is better.
GEW (EC) Ltd
Crompton Way, Crawley, West Sussex, RH10 9QR, United Kingdom
GEW (EC) Ltd designs and manufactures Arc and UV LED curing systems for printing, coating and converting applications. GEW is the leading manufacturer of UV curing systems for a range of markets, including narrow web label printing, offset printing, UV hot melt, wood coating and much more.