Cotton fabrics scouring

Uses Wetting agent and penetrant for cotton fabrics scouring agent for removing min. oil stains Properties Liq. 

Textiles. Sorbitol sequesters iron and copper ions in strongly alkaline textile bleaching or scouring solutions (see Textiles). In compositions for conferring permanent wash-and-wear properties on cotton fabrics, sorbitol is a scavenger for unreacted formaldehyde (252) and a plasticizer in sod-resistant and sod-release finishes (253). 

Venn obtained very little levoglucosan from the pyrolysis of raw cotton, whereas washing with water increased the yield to 28 %, and further prepurification by treatment with dilute alkali and acid provided a yield of 38%. Holmes and Shaw found that a cotton fabric purified by scouring and bleaching provided more tar and less char on vacuum pyrolysis than the reference materials. A Russian patent" claims that the heat resistance of cellulose is greatly increased by lowering the content of alkali metals to 0.03 — 0.05%. 

The function of the detergent is to remove the dirt and dust particles and other constituents of the size such as china clay from the cotton fabric. The detergent keeps the soils in dispersed or suspended form in scouring solution and prevents redeposition on the fabric. Fig. 4-10 illustrates the sequence of events of soil removal. Adventitious dirt adhere to the fabric because the oil acts as an adhesive towards it. The fabric/soil/water interfaces not soluble in water is shown in... 

Glanair. [Bruce Chem.] Liq. rqrlace-ment for sodium tripolyphmphate in scouring and bleaching of cotton and polyester/cotton fabrics. 

It is established that the barrier efficiency of the woven fabrics directly depends on the arrangement of the filaments in the yam and the construction of the woven fabric. Research indicates that a desized, scoured, and bleached plain-weave cotton fabric weighing 130 g/m finished with a natural antimicrobial agent, neem seed, showed 99.5% antibacterial activity against S. aureus (Joshi et al., 2007). It should be mentioned that neem seed is obtained from the neem tree, Azadirachta indica, which... 

Mixed Enzymatic Process in Scouring of Cotton Fabrics... 

Hartzell, M., and Hsieh, Y. L. (1998). Enzymatic scouring to improve cotton fabric wettability, 68(4), 233-241. 

Five plain woven fabrics, two polyester fabrics, and three cotton fabrics were examined in a yam pullout test, as schematically shown in (Figure 1(a)). Characteristics of these fabrics are presented in (Table 2). Sample PETl is consisted of twisted multi filaments of polyester as weft and warp yams. Sample PET2 has intermingled polyester multi filaments as warp and textured polyester multi filaments as weft yams. The COTl is a scoured cotton fabric with ringspun yams as wefts and warps. The COT2 is a bleached cotton fabric with ringspun weft and warp yams, and finally COTS is a bleached cotton fabric with open-end spun wefts and warps. 

Scouring and bleaching of cotton fabrics are also attractive targets for enzyme-based processes, due to the severe environmental impact of these processes. These processes are also very energy demanding. Raw cotton contains about 10% of impurities. Pectins, waxes and coloured components can all be partially removed from raw cotton by enzymatic treatments but the residual seed coating remains a problem. 

Losonczi, A., et al., BleachabiUty and Dyeing Properties of Biopretreated and Conventially Scoured Cotton Fabrics, Textile Res. J., 74(6), 501-508, 2004. Annual statistics, EDANA, Brussels, 2002. 

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