Open scouring

Cellulose Diacetate. When preparing cellulose diacetate for dyeing, strong alkahes must be avoided in the scouring of acetate because the surface of the cellulose acetate would be saponified by such treatment. Many fabrics tend to crease and therefore requke open-width handling. Scouring is frequendy carried out on a jig or beam using 1.0 g/L of surfactant and 0.5—1.0 g/L tetrasodium pyrophosphate for 30 min at 70—80°C. 

Cellulose Triacetate. Cellulose acetate having 92% or more of the hydroxyl groups acetylated is referred to as triacetate. This fiber is characteristically more resistant to alkali than the usual acetate and may be scoured, generally, in open-width, with aqueous solulions of a synthetic surfactant and soda ash. Triacetate is a hydrophobic liber, as compared to secondary acetate, and consequently does not dye rapidly. It is necessary to increase the rate of diffusion of the disperse dye into the fiber by increasing the dyeing temperature to 110— 130CC or using a dye accelerant or carrier, or both. 

Never use abrasive or scouring materials on plastic ware. Even though the bristles of a bottle brush are not likely to scratch plastic, the metal wire that they are wrapped on can Scratches can alter volumetric quality, are more difficult to clean, increase the surface area open to attack by chemicals (that would otherwise be safe for short exposures), and can prevent complete draining from a to deliver container. 

Will suspend excess print color and paste during open soaper scouring. 

CNC WET SS-80 is soluble in any proportion in cold or warm water as little as 0.25%. CNC WET SS-80 does an excellent job as a wetter or scour in the kier, open width boil-off, package machine, pad box, jig or dye beck. 

Anionic wetting agent for use in bleaching, enzyme desizing, rope or open-width scouring. 

Method A For white/printing (Poplin, Cambric, Rubia, Mulls etc.) Grey mercerize -> Scour in kier Rinse in kier Wash Chemicking in Cistern Wash -> Open boil in kier using Rinse in kier Wash —> Scutch -> Dry. 

Method C Knitted goods (Soft handle) Heavy Scour Cropping on face side of fabric Open Steam Decatising. 

In case of solvent scouring it is claimed that trichloroethylene at the boil provides a satisfactory method in a continuous open width plant of special design. 

Various designs of kiers are available [1,2]. Low pressure or open kiers are generally made with a hinged lid, and the scouring liquors are circulated by injector system or by the provision of an external multitubular heater and pump (Fig. 5-1). 

Batch Type Scouring Machine (Open Width Form)... 

Heavy fabrics like drills, corded fabrics and other weaves show rope marks and creases if they are scoured in rope form. Such fabrics are scoured in open width form. 

Fabrics can be desized and scoured in open width form using a jigger, which is one of the oldest and most universal machine in textile finishing. A centrally controlled fully automated jigger (Fig. 5-7) to secure improved processing quality with... 

In this process goods are padded through the scouring solution and then batched open width onto rolls which rotate slowly for several hours ranging from 6 to 24 h depending upon the type of cloth. The goods are then washed and rinsed in open width washers. 

The fabric in open width form is padded (Fig. 5-9) through the scouring solu-... 

Figure 5-14. Mezzera (Italy) open-width relaxing/scouring unit.

Scouring machines of wool depend on the kind of wool to be scoured i.e. raw wool, hank form or woven fabrics. Scouring of wool can be carried out in batch or continuous process, aqueous or solvent media and rope or open width form. 

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