Process for impregnating filament strands

Details Process for impregnating filament strands Process for impregnating filament strands

1988-11-09

1991-06-25

Kendell, Lorraine T.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 341, 4273898, 428372, 428378, 428389, 428391, 428392, B05D 302, C03C 2502, D02G 300

Patent

active

050264109

ABSTRACT:
A method for impregnating a strand of filaments during the strand manufacture with thermoplastic or thermoset polymer powder particles is disclosed. The method includes the steps of forming a strand of filaments, keeping the filaments separate, impregnating the filaments with an aqueous slurry containing the powder particles, and drying the filaments to remove the water and produce a strand impregnated with powder particles. The powder particles are present on the strand in an amount of between about 5 to 50 weight percent based on the weight of the impregnated strand. Glass fibers coated with the slurry according to the process of this invention are suitable for impregnation with thermoplastic powders.

REFERENCES:
patent: 2723208 (1955-11-01), Morrison
patent: 3418094 (1968-12-01), Marsden et al.
patent: 3450658 (1969-06-01), Morison
patent: 3717448 (1973-02-01), Drummond et al.
patent: 3773546 (1973-11-01), Marzocchi
patent: 3862287 (1975-01-01), Davis
patent: 3918947 (1975-11-01), Maaghul et al.
patent: 4225650 (1980-09-01), van Brederode et al.
patent: 4614678 (1986-09-01), Ganga

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