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Technical Information

Performance Chemicals forTextiles

TI/T SizingAugust 2009 Page 1 of 5

Supersedes all previous editions

= Registered trademark ofBASF Aktiengesellschaft Size CB

Water-soluble size for warp yarns composed of cellulosic fibres,polyester/cellulosic fibre blends, filament, viscose & rayon.

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Chemical Nature Polyacrylate in water.Physical form Brownish/Viscous liquid.Storage In sealed containers, Size CB can be stored for 12 months with no

noticeable change in its properties at a temperature of 5oC to 40

oC.

Partly used containers should be kept tightly closed.

PropertiespH Approximately 6.0-7.0 (100 g/l at 20

oC).

Density Approximately 1.09 g/dm3at 20

oC.

Viscosity 1000-1500 mPas. of15% aqueous solution.(Brookfield RVT, sp 4/100 rpm -1)

Solubility Size CB is miscible in all proportions on stirring with cold or hot water.

Solutions of Size CB do not form a skin and are very stable if stored inclean, sealed containers.

Stability Solutions of Size CB have adequate stability to water hardeningsubstances.

However, the product may form barely-soluble precipitates in thepresence of acids, polyvalent metal ions, e.g. copper, aluminum, zincand iron ions and with cationic substances.

Compatibility Size CB has good compatibility with alkalis.

Size CB is not compatible with Size CE or Size CO.

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Ecological Information Size CB is largely eliminable from water by abiotic processes such asadsorption on activated sludge.Further data, including the COD value, are given in the current SafetyData Sheet.

Action When it dries, Size CB forms a strong, tough film, which has excellentadhesion to cellulosic fibres and to polyester/cellulosic fibre blends.

The high adhesive power of the product results in an excellent sizingeffect and weaving performance.

Warps that have been correctly sized with Size CB give excellentresults, which meet the highest requirements, on all types of weavingmachines normally employed for staple fibres.

Washing-out Properties Size CB can be readily washed out.

If Size CB is employed in combination with a starch, the desizingconditions depend on the properties of the starch products employed.

ApplicationSize CB can be used without any further additives for sizing spun rayonwarps, doubled warps and certain cotton yarns, e.g. for terry cloth orsurgical fabrics.

All that is necessary is to stir the size into the water until the solution ishomogenous.The sizing liquor is then ready for use. It can be applied at roomtemperature or 80-90 oC.The size concentration of the liquor is measured with refractometer.When Size CB is applied alone, the relative humidity of the air in theweaving department should not exceed 70% at 22 oC(=13.6 g water per m3 air) of cf. diagram

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Size CB and Starch Size CB can be applied in combination with all types of starches.Depending on the weaving requirements and on the climatic conditionsin the weaving department, the ratio of Size CB to starch can be variedfrom 2:1 to 1:3.

The liquor concentration also with such combination sizes naturallydepends on the type of yarn to size and on the mechanical conditions.

To improve the processing characteristics and flow properties ofnatural starches, it is advisable to degrade them to certain extent, e.g.with Size Degrading Agent SC. This product breaks down the longchain molecules of vegetable starches and thus lowers the viscosity ofthe sizing liquor.

The following diagrams show the amounts of Size Degrading Agent SCthat are recommended for combinations of the most important naturalstarches (potato and maize starch) with

Size CB in the usual proportions of 1:2, 1:1 and2:1.

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BASF Pakistan Private Limited46-A Block 6 PECHS75400 Karachi, Pakistanwww.basf.com/textile

SafetyWhen using this product, the information and advice given in our SafetyData Sheetshould be observed. Due attention should also be given tothe precautions necessary for handling chemicals.

Note

The data contained in this communication are based on ourcurrent knowledge and experience. In view of the many factorsthat may affect processing and application of our product, thesedata do not relieve processors from carrying out their owninvestigations and tests; neither do these data imply anyguarantee of certain properties, nor the suitability of the productfor a specific purpose. Any descriptions drawings, photographs,data, proportions, weights, etc. given herein may change withoutprior information and do not constitute the agreed contractualquality of the product. It is the responsibility of the recipient of our

products to ensure that any proprietary rights and existing lawsand legislation are observed. Responsibility for compliance withthe requirements of the downstream textile market rests with thetextile processor.

August 2009