分散染料碱性染色体系(二)

Alkali Method of Disperse Dyeing (Ⅱ)

4 耐碱性分散染料 由上节可知,含有酯基、酰胺基和氰基等水解敏感性基团的分散染料,大多集中在偶氮型染料中,它们对pH值的敏感性较大,可供实用的品种需慎加选择。而葸醌型染料大多数对pH值敏感性较小,多数可用于碱性染色。 市售的各种碱性染色助剂,其染色时起始浴pH值为8.5～10.85,染色结束时的pH值为7.3～9.5,其中部分助剂起始浴的pH值基本上可维持不变。为此,作为耐碱性分散染料,其适应的pH值在4.0～11.0之间为好。另外,

The traditional way to dye polyester with disperse dyes is in an acid bath. In this paper,the author introduced the dyeing process in a basic bath. With the development of alkali-stable disperse dyes and relative auxiliaries,es-pecially the exploitation of Shin-Gosen ,the advantage of this process is recognized by the dyers increasingly . The advantage of this process is high efficiency,low cost and energy and time saving. The mechanism of this process, a-long with the related factors and dyeing technology,is interpreted.