Studies were carried out in a nonwoven roll goods plant to help eliminate subjective formation ratings. Tests were run on single layer samples with instruments measuring color, transmittance, haze and camera image gray scale values. High correlations are shown with air porosity, basis weight and formation ratings. Relationships to diaper glue bleed through, superabsorbent loss, and web tracking are reported. Some effects of process change are noted. Correlations critically depend upon measuring identical sample areas.
References
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TrepanierR.J., JordanB.D., and NguyenN.G., Tappi J.81(10):191 (1998).
