Effect of the water content of padded cotton fabrics on reactive dye fixation in the pad‐steam process

A series of padded cotton fabrics with various water contents were obtained through vacuum dehydration. The effects of the water content on the fabric temperature variation during steaming, the colour properties, and the dye fixation rate (%F) were investigated. Dye distribution in the dyed cotton fibres was assessed. The influences of steaming time and sodium carbonate concentration on K/S value and %F of the dyed fabrics with low water content were also evaluated. The results indicate that reducing the water content of the padded cotton fabric to around 25.0% prior to steaming was favoured for reactive dyeing. The temperature of the wet fabric rose rapidly, the K/S value and %F were enhanced, and in addition the dye penetration into the dyed cotton fibres was sufficient. However, for padded fabrics with extraordinarily low and high water contents (e.g. 1.4% and 70.9% respectively), both the K/S value and %F were decreased. Furthermore, a white core phenomenon was evident for the fibres of the dyed fabric with a water content of 1.4%. Variation in the L* values was in line with the K/S values as the fabric water content varied. As expected, steaming time and sodium carbonate dosage can also affect reactive dye fixation greatly and should be determined accordingly for dyeing cotton fabric with low water content.

[1]  C. Kan,et al.  Effect of direct dyes on the UV protection property of 100% cotton knitted fabric , 2015, Fibers and Polymers.

[2]  Yuanfeng Wang,et al.  Foam properties and application in dyeing cotton fabrics with reactive dyes , 2014 .

[3]  Yuanfeng Wang,et al.  States of Water and Pore Size Distribution of Cotton Fibers with Different Moisture Ratios , 2014 .

[4]  Awais Khatri,et al.  The use of reflectance measurements in the determination of diffusion of reactive dyes into cellulosic fiber , 2014 .

[5]  Awais Khatri,et al.  The use of trisodium nitrilo triacetate in the pad–steam dyeing of cotton with reactive dyes , 2013 .

[6]  Ning Pan,et al.  On the Kubelka-Munk Single-Constant/Two-Constant Theories , 2010 .

[7]  James Park.  Understanding continuous fabric dyeing , 2009 .

[8]  R. F. Hyde.  Review of continuous dyeing of cellulose and its blends by heat fixation processes , 2008 .

[9]  W. Marshall,et al.  Padding, Drying, Steaming and Baking Stages in the Application of Dyes to Cellulosic Fibres and their Blends with Polyester Fibres , 2008 .

[10]  H. Eltz.  New Techniques of Continuous Dyeing , 2008 .

[11]  H. Gerber,et al.  Continuous Dyeing of Fabrics by the One-bath ‘Extended-time’ Pad–Steam Process , 2008 .

[12]  D. Lewis,et al.  Dyeing cotton with reactive dyes under neutral conditions , 2007 .

[13]  Youssef Mir,et al.  Continuous Dyeing of Cotton with Reactive Dyes Using Infrared Heat , 2005 .

[14]  M. Clark,et al.  Physico‐chemical modelling of the dyeing of cotton with reactive dyes , 2004 .

[15]  Normand Thérien,et al.  Comparison of the Thermal Fixation of Reactive Dyes on Cotton Using Infrared Radiation or Hot Air , 1998 .

[16]  S. Burkinshaw,et al.  A study of the dyeing of cotton with commerical dichlorotriazinyl reactive dyes , 1995 .

[17]  James L White,et al.  The Diffusion of Disperse Dyes into Nylon 66 Fibers: Dry Heat and Steam Fixation , 1974 .

[18]  G. E. Krichevsk,et al.  Use of Methods of Heterogeneous Chemical Kinetics and Nonequilibrium Thermodynamics for the Quantitative Evaluation of the Rate of Fixation of Reactive Dyes by Fibrous Materials 1 , 1970 .

[19]  E. Kissa.  Urea in Reactive Dyeing , 1969 .