Methods of producing an article which includes a light energy cu

Details Methods of producing an article which includes a light energy cu Methods of producing an article which includes a light energy cu

1992-04-30

1993-06-15

Pianalto, Bernard

Coating processes

Direct application of electrical, magnetic, wave, or...

Polymerization of coating utilizing direct application of...

427163, 427508, 427547, 427558, 427559, 427595, 427598, B05D 314

Patent

active

052196232

ABSTRACT:
In the manufacture of an article such as optical fiber which includes a light energy cured coating material, 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 magnetic field 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.

REFERENCES:
patent: 4448657 (1984-05-01), Turro
patent: 4863576 (1989-05-01), Collins
patent: 4932750 (1990-06-01), Ansel et al.
Morita, H. et al., J., Applied Polymer Science, 1989, pp. 1998-2007.
Schlef, C. L. et al., "UV Cured Resin Coating For Optical Fiber/Cable", Proceedings of 28th International Wire and Cable Symposium, 1979.

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