| 摘要 |
<p>The invention relates to radiation curable coatings for optical fiber. More in particular, the invention is directed to a Multi Layer Film Drawdown Method. The method of the invention comprises the steps of
a) selecting a substrate for the test;
b) applying a Primary coating to the substrate using a defined thickness drawdown bar;
c) optionally curing the Primary coating;
d) applying a Secondary coating to the Primary coating using a defined thickness drawdown bar, wherein the defined thickness of the drawdown bar to apply the Secondary coating is greater than the defined thickness of the drawdown bar used to apply the primary coating;
e) applying radiation to the multi layer film sufficient to effectuate the cure of both the Primary and Secondary into a Fused Composite film;
f) removing the film from the substrate; and
g) evaluating the functional properties of the cured film.</p> |
