Abstract:The effect of the way of cut fiber, glass fiber length, the type and amount of dispersants on dispersion
of glass fiber suspension was investigated. The results showed that the dispersion degree of glass fiber after cutting is
significantly higher than that of glass fiber before cutting. The percentages of fiber mass area in the suspension before
and after cutting are 72. 6% and 2. 4%, respectively. The dispersion of rectangular cotton-block after beating is better
than that of the square cotton-block. The longer glass-fiber length or the higher reunite phenomenon, the more difficult
dispersion of the glass fiber suspension. The appropriate length of glass fiber, about 10 ~12 mm, is helpful to
the dispersion of the suspension. When the mass fraction of the suspension is up to 0. 2%, the optimum addition amounts
of hydroxyethyl cellulose, hydroxypropyl methyl cellulose and sodium hexametaphosphate are 0. 008%,
0． 012% and 0. 04%, respectively. Correspondingly, the absorbances of glass fiber suspension under the optimal
mass fraction of three types of dispersants are 0. 344, 0. 703 and 0. 663 A, respectively. The sedimentation experiment
showed that the glass fiber suspension added the sodium hexametaphosphate had the best dispersion, the minimum
suspension sedimentation height and the slowest sedimentation rate. The dispersion of the glass fiber suspension
added hydroxypropyl methyl cellulose is better than that of the glass fiber suspension added hydroxyethyl cellulose.
