Optimization of the number of beating revolutions for centrifuged glassfiber wet-laid mat

Abstract

Papermaking technique was applied to fabricate the centrifuged glassfiber mat. This paper discussed the influence of the number of beating revolutions on morphology, drainability and absorbance of centrifuged glass wool suspensions and density and tensile strength of the resulting centrifuged glassfiber mat. Beating had a great shortening effect on fiber length and aspect ratio of glass fibers but an inconspicuous effect on fiber diameter. The glass fibers in the suspensions beaten at 0r and 1500r was long and highly entangled while those beaten at 3000r, 5000r and 8000r were slightly shortened and overlapped. The glass fibers beaten above 8000r were seriously damaged and uniformly distributed. Drain-ability of the suspensions under all the numbers of beating revolutions was excellent with drainage resistance of lower than 16 o SR and drainage time of 8s.Medium and heavy beating improved the uniformity of the suspensions while heavy beating greatly lowered the tensile strength of the resulting centrifuged glassfiber mat. In order to enhance the overall properties of the centrifuged glassfiber mat, the optimum number of beating revolutions was 3000r. Downloaded by [University of Windsor] at 18:28 03 October 2015 2

Effect of papermaking technique parameters on air permeability and sound insulation of glass fiber felt

“…Chen et al 15 indicated that beating process would decrease the fiber length leading to a reduction in fiber-fiber contact and improve the uniformity of fiber suspensions. Furthermore, Li et al 16 found the best mechanical performance of glass fiber wet-laid mat could be obtained at 3000 rpm. Hu et al 17 claimed that glass fiber wet-felt with 20% wood pulp fiber exhibited optimum break elongation, flexural property and bursting strength.…”

Correlation between glass fiber suspension characteristics and physical of glass fiber felt: Role of beating time and speed

“…Christensen [14], Moosaie [15], and Keshtkar [16] put more effort into the development of models to describe the flow and morphologies of fiber suspension, aiming at improving the stability and uniform of fiber suspension and felt. Li et al [17,18] found that the uniformity of the slurry and tensile strength of glass fiber felt could be improved by changing the beating revolutions and also indicated the optimization of the number of beating revolutions for centrifuged glass fiber wet-laid mat was 3000 r. Tensile strength of glass fiber felt also depended on the strength of the individual fibers, friction of fibers, mechanical interlocking among fibers, and fiber distribution [19]. Chen et al [20] studied the use of glass fiber wet-laid felts as the core material for vacuum insulation panel and found that the thermal conductivity was influenced by the uniformity of the core material.…”