Date of Award

4-9-1996

Degree Name

Bachelor of Science

Department

Paper Science and Engineering

First Advisor

Dr. Ellsworth Shriver

Abstract

This thesis evaluated the effectiveness of the Shinhama high consistency kneader while being used to de-ink a mixed office waste furnish. The experimentation procedure was a 22 full factorial experiment utilizing power loadings of 15 and 18 amps and pH levels of 7.55 and 9.96 as the control variables. The response variables that were analyzed to critique the kneader's performance were fiber degradation and ink particle size.

Fiber degradation was measured through the use of tensile, zero span tensile, tear, and Kajaani fiber analysis. Ink particle size was measured using a computerized image analysis program.

It was determined that the Shinhama high consistency kneader was capable of reducing the ink particle size by up to 94% at 15 amp power loading. This reduction of ink particle size was accomplished with a minimal 10% reduction in fiber length, which is indicative of minimal fiber degradation.

Based on these results the Shinhama high consistency kneader 1s a viable option to be considered if high concentrations of thermoplastic inks are contaminating your secondary fiber source.

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