Heparin therapy in meningococcal septicaemia.

Hercosett 57 can be readily converted to a Bunte salt terminated polymer which exhibits different ionic character both in solution and at the fibre surface; in alkaline solution it behaves as an anionic polymer, but in weakly acidic solution it possesses amphoteric properties. Because of this overall change in ionic character the polymer can be applied to chlorinated wool tops from baths set at pH 3.5, in marked contrast to Hercosett 57 where bath pH values of 8.0 are required. The dyeing properties of yarns produced from these tops will be described with special emphasis on the differential dyeing possibilities offered by mixing these yarns with the more usual Hercosett 57 treated yarns. Soiling properties of the new finish have also been evaluated.

The Finishing of Wool Tops with Bunte Salt Polyamide Polymers

Cockett

Lewis

1976

Continuous Dyeing and Polymer Shrink‐resist Processes for Wool

Lewis¹

1977

A number of polymer shrink‐resist treatments for wool in various forms have been proposed; one of the most popular of these being the chlorine‐Hercosett 57 process, applicable to both wool tops and garments. In order to increase the versatility of such processes, polymers have been developed which can be applied together with dyes at the dyeing stage. This paper describes the application of several different water‐soluble polymers to wool piece goods and tops, using pad‐batch methods of application. Fabrics produced by the combined dyeing and finishing techniques are capable of meeting both machine washability and colour fastness criteria required in the Superwash specification. Problems in developing the method for wool tops are discussed, together with indications as to their solution.

Some Effects of the Contamination of Hercosett Solutions by Sodium Sulphite during Commercial Chlorine‐Hercosett Shrinkproofing Processes for Wool

Cockett

James

Lewis

1978

Inter nat io nal Wool Secret aria t Technical Centre Valley Drive Ilkley Yorkshire EnglandDuring the commercial operation of chlorine-Hercosett processes, some contamination of the resin solution by sodium sulphite takes place. The progressive reaction between Hercosett 5 7 and sodium sulphite can cause differential-dyeing effects and inadequate shrinkproofing of treated wool. These effects are attributable to a conversion of the cationic sites in the resin to anionic sites. Methods of preventing the development of these problems are described, as are techniques for ameliorating these effects on inadequately-processed wool.