Patent ID: 7641826

Claim:
Process for monitoring binder mix loading of glass fibers comprising (a) providing a first blend combining glass fibers and binder mix, each in an amount suitable for forming insulation product; (b) exposing samples of said first blend, while on a static support substrate or on a moving support substrate, to radiant energy in a wavelength region of about 350-2500 nm, and spectroscopically collecting data resulting from penetration of such energy into said first blend of such samples; for (c) providing calibration of spectroscopic instrumentation, based on the data collected in (b), so as to enable reflecting binder mix content of such samples; (d) placing a second blend of glass fibers and binder mix on a predetermined support substrate; (e) subjecting, free of mechanical contact with said second blend, at least a portion of said second blend to radiant energy in a wavelength spectrum of about 350-2500 nm, for measuring absorption data reflecting absorbed energy into said second blend; in which (f) such measured absorption data of (e) is correlated with said calibration of (c) for verifying quantitative measurement of hinder mix content of said second blend.