The Combined Dyeing and Finishing of Cellulosic Fabrics

Abstract

The introduction of reactive dyes has made possible the development of methods for linking the dyeing and finishing processes. This step offers considerable economy in operating costs because of the simplicity of the operations and the streamlining of production, and at the same time dye consumption is markedly reduced as a result of the very high degree of fixation obtained. Two processes are described: the Procion–Resin process for cotton fabrics, which permits simultaneous dyeing and finishing, and the two‐stage Procion–Resin process for viscose rayon fabrics, which links the two processes. Excellent fastness properties and high‐quality finishes can be obtained by the two processes.

Automation and its Influence on Dyeing with Reactive Dyes

“…After fixation of the dye the goods are normally soaped to remove from the fabric any unfixed hydrolysed dye and residual alkali. Alternatively, crease-resist aftertreatments may be applied which effect neutralisation and give adequate wet-fastness properties without the need for washing-off hydrolysed dye (7).…”

“…After traversing the storage chamber the batch enters the washing chamber (W). The centre of the roller is connected to the wash-liquor supply; the batch is rotated and hot water is pumped through the fabric, via the hollow roller, until the optical control (7) shows that the effluent is colourless. The control system (6) then orders a cold-water rinse and the goods are automatically removed from the roller and forwarded for hydroextraction and drying.…”

“…Discussion so far has concerned the pad(alka1i)-batch(co1d) process for dyeing fabrics. Other processes which offer the possibility of full mechanisation include the pad(bicarb0nate)-dry and the Procion-Resin processes (7,15). Both these processes involve the preparation of a pad-liquor which is stable for over four hours, obviating the need for a mixing device.…”

Effective Cross-linking Dyeing Method for Jute Fabric with Reactive Dyes

“…In recent years, however, the feasibility of combined dyeing and finishing of cellulose fabrics with various dyes was studied (Shet, 1981;Rattee, 1962;Hashem et al, 1981;Kamel et al, 1990;Kamal et al, 1989;Alfy, 1989). Lutzel (1966) and Fowler (1964) reported that covalent bond could be established between cellulose and dyes containing mucleophilic groups by employing cross-linking agents, which are able to provide several positively charged atoms.…”

Economical One Step Process For Simultaneous Application Of Pigment Dyeing And Wrinckle Recovery Finishing Of Cotton Fabrics

“…Several reports on simultaneous dyeing and durable press finishing of cotton fabric have appeared in the literature [4][5][6][7][8][9][10][11][12][13]. Dong et al [5] carried out simultaneous dyeing and durable press finishing of cotton fabric with reactive dyes and citric acid finishing agent by using a pad-dry-cure process.…”