Drying of Latex Backcoated Acrylic Fabrics: Heat Transfer Coefficients

Abstract

Drying and curing tests were performed in a laboratory scale dryer on dyed tufted acrylic fabrics and the latex adhesive backcoating to obtain heat transfer coefficients as a function of the mass velocity of air flowing through the fabric. Treating the fabric as a packed bed of cylindrically shaped fibers, equations were developed making it possible to calculate the flow-through velocity G_tf from measured air velocities directed at the upper and lower faces of the fabric. Correlations obtained for the heat transfer coefficients were h = 2.22G_tf^0.47 for fabric drying and h = 4.84G_tf^0.32 for curing the latex adhesive backcoating (h in W/m² K, G_tf in kg/m²h). These results were compared with earlier investigations of the drying in packed beds.

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