Heat Transfer Printing.

Fenoglio, R. A.; Gorondy, E. J.

Kinetic-thermodynamic model analysis of the dyeing mechanism of heat transfer printing was used to clarify the effect of the critical process variables on the system. The rate-controlling mechanism may be the gas phase, the fiber phase or both In a state of equilibrium, depending on the specific values of the partition coefficient, the value of the diffusion coefficients in the gas and fiber phases, the average distance between fiber and paper and the diameter of the filament. In dye suitability evaluations, the effect of both dye concentration and transfer temperature on dye transfer must be analyzed simultaneously. The critical variables in the process are dye-binder selection, type and weight of paper support, transfer temperature, dwell time, and pressure. Unsuitable choice of these variables may result in poor color transfer efficiency, ghosting of design, ring dyeings, poor hand, poor shade and strength reproducibility, poor crockfastness or an uneconomical transfer operation. Determination and use of the minimum required pressure for a given fabric construction results in maximum color transfer efficiency while minimizing the damage to the hand of the fabric. In deep shade dyeings, significant savings in ink cost may he achieved by knowledge of the color transfer vs. ink concentration relationships. For both mixed shades and single colors, analysis of the dye transfer rates at various transfer temperatures will determine the minimum required time to maximize shade reproducibility.

TEXTILE printing; TEXTILE industry; TEXTILES; WEAVING; DRY goods; INDUSTRIAL chemistry; BLEACHING (Chemistry); SOLUTION (Chemistry); TRANSFER printing; PARTITION coefficient (Chemistry)

Textile Chemist & Colorist, 1975, Vol 7, Issue 5, p24

0040-490X

Academic Journal