Bamboo dyeing process-Environment friendly disperse dyes
30 July 04

3. Environment-friendly disperse dyes

Disperse dyes so far have more than 1200 molecular structures, the number of goods reached more than 3,500. Disperse dyes have some disadvantages that are incompatible with environmental and ecological protection. The main reason is that some disperse dyes will reductively decompose to produce carcinogenic aromatic amines. Some products are allergic dyes. Many products have AOX problems and due to heat during printing and dyeing processes. Reduced fastness caused by swimming.

In recent years, in order to improve the function of disperse dyes and environmental protection requirements, some new dyes have been developed, mainly in the following areas:

(1) New disperse dyes that meet the requirements of Eco-Tex Standard 100 These products mainly include Ciba Chemical's Cibacet EL series dyes for the dyeing of acetate fibers and their blended fabrics; BASF's Dispersol C-VS is used for polyesters. A series of dyes for dyeing fibers and their blends; Yorkshire's Serisol ECF environmentally friendly disperse dyes for acetate dyeing; Mitsui-BASF's Compact ECO dye series; Nippon Kayaku's Kayalon Polyester LW for polyester fibers and polyurethanes A series of disperse dyes that are dyed by blends of fibers, and Sumitomo Corporation, Japan, are suitable for Sumikar on MF dyes dyed with fine denier polyester fibers.

(2) Novel Disperse Dyes Substituting Allergenic Disperse Dyes C.I. Disperse Orange 76 and C.I. Disperse Orange 37 are widely used in the market for allergic disperse dyes. Kayalon Polyester Yellow Brown 3RL (EC) 143, which is mainly used by Nippon Kayaku Co., Ltd. to replace allergic dyes; Dianix Orange UN-SE 01 environmentally friendly disperse dye developed by DyStar; Sumikaron Blac S-EC of Sumitomo Chemical Co., Japan 300% disperse dyes; Lumacron Black FD disperse dyes developed by LJ Specialities, UK.

(3) New disperse dyes that do not contain adsorbable organic halides. These dyes are mainly Terasil Blue W-BLS dyes from Ciba Refinery Co., Ltd. It is suitable for exhaust dyeing and continuous dyeing of polyester fibers and their blended fabrics; PAlanil Cyanine B 200% and Palanil Luminous Yellow developed by BASF

GN is also an ultra-violet disperse dye that does not contain adsorbable organic halides. They are suitable for the dyeing of polyester fibers and their blended fabrics; the company also introduced to the market a new generation of Dispersol Deep Red SF high-performance disperse dyes.

(4) High-performance disperse dyes with excellent washing fastness These products mainly include Terasil W series novel disperse dyes with excellent wet fastness developed by Ciba Seiki Co., Ltd., which has 11 varieties; Dianix HF dyes developed by DyStar Co., Ltd. It is also a high-performance disperse dye with excellent washing fastness, excellent application properties, ease of use, etc.; BASF's Dispersol XF is a new type of disperse dye with top horizontal washing fastness; and Clariant's Foron Blue RD -SE 300, a high-strength black disperse dye for fast dyeing, with high lifting force and dye bath sorption rate, especially after its dyeing is heat-fixed; good wet fastness; developed by LJ Specialities, UK A novel disperse dye with excellent washing fastness, trade name Itosperse HW dye, has excellent washing and sublimation fastness and is not harmful to the ecological environment.

(5) Environmentally-friendly disperse dye disperse dyes composed of biodegradable dispersants Dispersants in commercial products are also a factor that affects environmental protection. The series of dispersants of naphthalene sulfonic acid-formaldehyde condensates and lignin sulfonates widely used so far have been dispersed. Agents, etc. are all biodegradable. In recent years, BASF has developed a new biodegradable dispersant Setamol E. DyStar has also developed new biodegradable dispersants and used them to form environmentally friendly disperse dyes such as Dianix ECO Liquid dyes.