| Autor: |
Blanchard, E. J., Reinhardt, R. M., Graves, E. E. |
| Předmět: |
|
| Zdroj: |
Book of Papers, National Technical Conference of AATCC; 1995, p519-525, 7p |
| Abstrakt: |
Chemical modification of cotton through the use of specific reactive additives and finishing agents results in cationic fabric that is dyeable with several classes of dyes. These include direct and reactive dyes normally used for dyeing cotton, as well as acid dyes used for dyeing other natural and synthetic fibers. The simplest chemical modification consists of treating cotton with an alkanolamine or hydroxyalkyl quaternary ammonium salt additive, a methylolamide or polycarboxylic acid crosslinking agent, and a suitable catalyst. The crosslinked cotton has dimensional stability, as well as wrinkle resistant properties, and is dyeable with anionic dyes. The nitrogenous additive reacts with the crosslinking agent during curing at elevated temperatures, resulting in cationic or potential cationic sites in the substrate with affinity for anionic dyes. As a result, alkali is not required for fixation of reactive dyes because of the ionic attraction. Although electrolyte in the dyebath is not required in any of these systems, small amounts are useful for leveling and control of initial dye strike, if desired. Additional modification of the system by inclusion of polyethylene glycol in the finishing treatment usually enhances the dyeing of the cotton with relatively large dye molecules. All of the these processes have application in garment dyeing or in textile printing processes, in which cases the fabrics are dyed after they have been finished and fabricated into the desired configurations. A review of various aspects of the chemical interactions involved in the finishing and dyeing processes is presented. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
