Ultrasonically speeded fiber impregnation

Details Ultrasonically speeded fiber impregnation Ultrasonically speeded fiber impregnation

1986-05-08

1987-08-25

Pianalto, Bernard D.

Coating processes

Electrical product produced

Welding electrode

427387, 4273897, 4274344, 4274346, 4274432, B05D 312

Patent

active

046892443

ABSTRACT:
A method of ultrasonically treating a fibrous strand for subsequent use in high speed filament winding operations. The strand, composed of a multiplicity of filaments such as glass or carbon, is initially coated with a silane-type binder which is dried onto the surface of the filaments. The strand is then passed at a high speed through a bath of thermosetting resin, and while submerged in the resin is subjected to ultrasonic energy. The ultrasonic energy increases the rate of interaction of the binder and resin, thereby increasing the wetting rate of the individual filaments. This permits saturation of an individual strand or a group of strands with the resin in a much shorter contact time and guarantees removal of all entrained air in the bundle. At the same time, it provides a more stable resin-fiber bond after curing.

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patent: 3513016 (1970-05-01), Wood et al.
patent: 3649358 (1972-03-01), Johnston
patent: 3870551 (1975-03-01), Iwami et al.
patent: 4157420 (1979-06-01), Bourrain et al.
patent: 4388129 (1983-06-01), Oizumi et al.
patent: 4450197 (1984-05-01), Hager

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