Impregnation of yarns

Details Impregnation of yarns Impregnation of yarns

1979-10-29

1981-06-30

Lusignan, Michael R.

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273898, 4274073, 428375, 428378, 428382, 428383, B05D 302, D02G 300, B32B 2500, B32B 2700

Patent

active

042763282

ABSTRACT:
A process for the treatment of glass yarn in which the yarn is impregnated with a low viscosity solution of a thermosetting binder in an organic solvent, the viscosity of said solution being not greater than 50 centipoise (=0.05 Pascal seconds) at 25.degree. C.; solvent is then evaporated from the impregnated yarn; the yarn is further impregnated with a high viscosity solution of a thermosetting binder in an organic solvent; and solvent is again evaporated from the impregnated yarn. The process improves the properties of the glass yarn when used in the manufacture of glass reinforced composites.

REFERENCES:
patent: 3718449 (1973-02-01), Fahey
patent: 3773546 (1973-11-01), Marzocchi
patent: 3897588 (1975-07-01), Nohtomi
patent: 3955036 (1976-05-01), Plueddemann

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