An evaluation of household tissue softness

摘要

This study extends our 2019 paper,a study of the softness of household tissues using a tissue softness analyzer(TSA)and hand-felt panels. It revisits the softness theory of Holger Hollmark by applying a reciprocal matrix approach to measure sheet bulk softness and surface softness,and then make comparisons with the results obtained using a TSA instrument. We ascertained that there was a high correlation of R=0.904 between panel-corrected hand-felt(CHF)softness and TSA softness(TSA-HF);and a low correlation of R=-0.678 between panel-corrected hand-felt surface softness(CHSS)and TSA smoothness(TS-750). Three hunches about TSA measurements were confirmed: 1)Hollmark's theory was confirmed by a high correlation coefficient(R=0.895)between CHF and CHSS softness,indicating that the two parameters are mutually dependent;2)TS-750 differs from CHSS and has partial influence on TSA-HF results with a correlation of R =-0.510;and 3)although TS-750 has only limited influences on TSA-HF,further opportunities for their application can be provided using pertinent regression equations. Application: The reciprocal matrix approach deduction model can be used in conjunction with tissue softness analyzer methods as optimization tools for tissue production,research,market surveys,and quality improvements.