Author

Bhide

Date of Award

12-2003

Degree Name

Master of Science

Department

Chemical and Paper Engineering

First Advisor

Dr. Sasha Pekarovicova

Second Advisor

Dr. Margaret Joyce

Third Advisor

Dr. Dan Fleming

Access Setting

Masters Thesis-Open Access

Abstract

A new generation of "Hot melt inks for Rotogravure" was formulated. They melt during heating and reach printable viscosity between 75° C and 130° C, depending on formulation. After printing onto substrate, they solidify. Selections of the best formulations were done based on ink rheology, and print analysis. The formulated inks were also printed on the Moser sheet-fed proofing press .. The rheological data indicated that hot melt inks (without viscosity modifier) have viscosity in the range of 10°-101 Poise at 95°C. After printed on a laboratory gravure K-Proofer, the inks showed good reflective density (0.90 - Yellow, 1.30 - Magenta, and 1.35 - Cyan) and rub resistance properties (95-98% - yellow; 70-85% - magenta, and 80-85% - cyan). The gloss properties (4.0-4.4 % - yellow, 3.1-3.3 % - magenta, and 2.6-3.5 % - cyan) were quite low.

Hot melt ink (with viscosity modifiers) had viscosity in the range of 10-2-10-1 Poise at 95°C. Inks showed promising reflective density (0.90 - yellow, 1.30 - magenta, and 1.35 - cyan), and rub resistance properties (96.5-98.5 % - Yellow; 93.5- 95 % - magenta, and 93.5-95.5 % - cyan). The gloss values (5.5-6.2 % - yellow, 5-5.1 % - magenta, and 5.1-5.9 % - cyan) were higher compared to hot melt ink (without viscosity modifier). The viscosity modifier had a positive influence on rheological properties.

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