A METHOD TO DETERMINE SHEET RELATIVE BONDED AREA USING THE FIBER FLEXIBLITY INDEX

摘要

By exploring the relationships among sheet relative bonded area (RBA), light scattering coefficient S, sheet density (rho)_(s), and fiber flexibility index (FFI), we have developed a new method for measuring the sheet RBA that can be used on-line. The result is a linear relationship that allows quick, convenient calculation of RBA during on-line operation. Refining and bleaching introduce only a modest over-estimate of the calculated RBA, compared to measured values, i.e., relative error of about 10percent.