Wet pick

Application of stahi l i zera. The fabrics were prepared by applying stabilizers dissolved in solvents selected for their ability to dissolve the additive as well as to swell silk. The concentration of additive in solution was adjusted to give the desired fabric add-on assuming the fabrics would have 100% wet pick-up. If the fabric wet pick-up is indeed 100%, the dried fabric would have the desired addon. 

Energy and Related Savings from Controlled Low Wet Pick-Up Application of Textile Chemicals and Dyes via Semistable Foams... 

Other substantial benefits derive from reducing the wet pick-up in wet finishing and continuous dyeing operations. 

Chemical and Related Savings. Improvement in resin efficiency when the finish is applied at low wet pick-up can be expected due to the reduction or elimination of migration during drying. 

If the reactants are applied uniformly, the absence of migration allows a lower average level of treatment to assure a given level of performance in the finished fabric. Experimental evidence for such an improved efficiency has been reported by several investigators (4, 13, 14). Results in our laboratories have confirmed a higher resin efficiency for polyester-cotton blend fabrics treated at low wet pick-up by controlled applica-... 

Additional benefits to be realized from the low wet pick-up foam application method include greater line speed (especially where the dryer represents a bottleneck in the pad process to be replaced), lower pollution abatement costs due to reduced volumes of effluent and exhaust gases and reduced water consunption. 

By using disperse dye liquid concentrates which have thermofixation of 95% or greater (26), polyester fabrics can be foam-dyed at very lew wet pick-ups (e.g., 15-20% for medium-deep shades) without need for afterwashing. The resultant annualized per-line energy and cost savings are estimated, using Wygand s data (24), to be 30 x 10 BIU and 75,000, respectively. 

Goldstein, H. B., "Low Wet Pick-Up Finishing", paper presented at 1978 National Meeting of Amer. Assoc, of Textile Chemists and Colorists, Anaheim, California, Nov. 1-4, 1978 Book of Papers, pp. 275-282. 

Foam stability Is less critical for resin finishing or hand modification. However, It must not collapse prior to application on the fabric otherwise the composition will act like a conventional finish and result In high wet pick-ups. 

In conventional continuous wet finishing, a rather dilute, usually from 4 to 8% solids solution or dispersion of the chemicals Is prepared. The fabric Is then Immersed in this solution. The wet fabric Is passed through pad rollers to squeeze out the excess solution. Despite the squeezing, a cotton fabric usually retains 80 to 100% on the weight of the fabric of the finishing solution. For polyester-cotton blend fabrics, the wet pick-up Is normally 50 to 80% on the weight of the fabric. 

Emulsion Polymer Softener Catalyst Foaming Agent Wet Pick-Up... 

Because of the low wet pick-up, there is no loss in print definition upon collapse of the foam. Because no thickeners are used in the print paste, after washing is not necessary in most cases. 

The low wet pick-up of foam processing permits "wet-on-wet" applications. For example, foam printed fabrics have been foam finished without an intermediate drying. There was no loss in print definition as would be the case if conventionally printed goods were conventionally finished without first drying and curing the print. Thus an entire drying/curing step is eliminated. 

BERSET 2604 Is a melamine based resin with very low free formaldehyde content. It Is a very effective crosslinker and Insolublllzer for starch, protein, P.V.A., and latex In non-plgmented or pigmented coatings. When BERSET 2604 Is added to the coating color, good wet pick resistance and wet rub improvements are noticeable directly off the machine. 

Good wet pick resistance Low formaldehyde odor Good printing properties Compatible with most coating additives Excellent storage stability... 

Coating exhibits stable viscosity characteristics Compatible with most coating additives Imparts good dimensional stability to paper Good wet-pick resistance... 

CNC REZ PV is applied to the fabric by standard pad-dry-cure. The proper concentration of CNC REZ PV to employ will be dependent on the type of fabric and wet pick-up obtained on the padder. 

---