Continuous measurement method of curing degree and resin content of partially cured glass fiber-reinforced epoxy resin pre-flakes

摘要

The degree of curing and the amount of epoxy resin in the glass fiber reinforced epoxy resin preplet is determined by measuring the preflex at a selected wavelength, preferably about 4529 cm^-OneAnd 4055 cm^-OneAnd a control unit configured to expose the optical pulse to a series of optical pulses generated by an optical filter that transmits light at a predetermined band width concentrated in a wavenumber, By measuring the amount of epoxy groups and methyl groups present. When such measurements are made on a continuously moving prepreg sheet, it is desirable to control the degree of cure and the variation of the resin content to within 3% (hardness) and 3% (resin content) over a distance of at least 400yds (366 m) It is possible.