Abstract:
In a high power light radiator having a light transmitting quartz shell with a total radiation loading incident upon such shell in the order of at least about 2000 watts per sq. inch of surface area with a proportional part of such radiation having wavelengths below 1600 A wherein the quartz susceptibility to deterioration is decreased by the addition of an additive such as titanium or an oxide thereof to said quartz.
Abstract:
1. A PROCESS FOR PREFERENTIALLY AND RAPIDLY POLYMERIZING OR CURING OR CROSSLINKING THE EXTERIOR SURFACE OF A FILM LAYER ON A MOVING SUBSTRATE OF A PHOTOCURABLE MONOMER OR POLYMER COMPOSITION CONTAINING AT LEAST ONE POLYMERIZABLE ACRYLYL OR METHACRYLYL GROUP WHICH COMPRISES EXPOSING SAID PHOTOCURABLE COMPOSITIONS UNDER AN INERT GAS ATMOSPHERE TO A LOW PRESSURE MERCURY SHORT WAVE ULTRAVIOLET RADIATION SOURCE, AT LEAST 75% OF THE RADIATED POWER BEING AT A WAVELENGTH OF 2,537 ANGSTROM UNITS WHEREBY THE EXTERIOR SURFACE OF THE FILM IS PREFERENTIALLY POLYMERIZED OR CURED OR CROSSLINKED.
Abstract:
A treatment enclosure for irradiating a moving product which passes through said enclosure comprising an open treatment chamber housing a source of radiant energy, a pair of tunnels extending longitudinally from opposite sides of the chamber and an elongated inert gas injector channel, which opens into the enclosure a distance from the inlet tunnel end of the enclosure equal to at least ten times the smallest cross sectional dimension of the tunnel opening and which lies substantially parallel to the tunnel width, for directing inert gas at the moving product.