B - Operations – Transporting – 05 – D
Patent
B - Operations, Transporting
05
D
204/91.33
B05D 3/06 (2006.01) B01J 19/08 (2006.01) B01J 19/12 (2006.01) B29C 35/10 (2006.01) B29C 35/14 (2006.01) C03C 25/10 (2006.01) C03C 25/12 (2006.01) B29C 35/08 (2006.01) B29C 35/12 (2006.01)
Patent
CA 2036743
In the manufacture of coated optical fiber, fiber (21) is drawn from a preform (22) and coating with one or preferably two layers (42,44) of light curable coating materials. Afterwards, the coating materials are cured. Increases in manufacturing line speed may be achieved if the cure speed of the coating materials is increased. This is accomplished by the simultaneous application of a magneticfield during irradiation of the curable coating materials to enhance the crosslinking of the coating materials by a free radical polymerization mechanism. Upon absorption of light, a photoinitiator in each composition cleaves to produce two free radical fragments in the spin paired or singlet state. The magnetic field has the effect of enhancing the production of spin parallel radicals which enhances the polymerization initiation of the coating material, thereby allowing an increase in the manufacturing line speed through drawing and coating apparatus.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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