Brief Introduction Of Brighteners For Polyester And Its Blended Fabrics

High crystallinity, it is a hydrophobic fiber and requires non-ionic hydrophobic fluorescent brighteners.

Polyester dyeing is divided into high temperature (130 degrees), hot melt (180 1 210 degrees C) and carrier method.

To meet the requirements of heat resistance and diffusion, the suitable fluorescent whitening agents have smaller molecular weight and better thermal stability.

It is distributed in various types of fluorescent whitening agents.

For example, benzo has C.I. fluorescent whitening agent 135 (DT), C.I. fluorescent whitening agent 367 (KCB), C.1. fluorescent brightener 185 (EBF), C.I. fluorescent whitening agent 184 (OB), C.I. fluorescent brightener 393 (oB 1 L), etc.

Two styrene phenyl c.I. fluorescent brightener L99 (ER).

Tsai phthalimide has c.I. fluorescent brightener 162 (AT) and Lcukophor EFR.

Flower derivatives have C.I. fluorescent brightener 179 (Flulite XM MA).

There are coumarins, such as BlankophorEBL.

The C.I. fluorescent whitening agent 135 has 2 dosage forms, the dispersing agent is the fluorescent brightener DT, the Ciha company is Uvitex ERN, is mainly used in the polyester fiber whitening, has the good sunlight fastness, when the polyester cotton blended fabric whitening, has the enhancement to the cotton brightener's sunlight fastness, uses in the dip dyeing method is better.

DT resistant to acid and alkali, resistant to oxidizing and reducing agents, resistant to chlorine and hard water.

The production of fluorescent whitening agent DT in China accounts for about 1/4 of the total production of brighteners.

The name of the powdered product is PF, which is mainly applied to whitening plastics.

C.I. fluorescent whitening agent 185 is China's commodity name fluorescent brightener EBF, has bright blue fluorescence, the maximum absorption wavelength is 367 nm, the maximum emission wavelength is 429 nm.

It has good whitening effect and high fastness. It is suitable for polyester fiber.

It is especially suitable for whitening the polyacrylic raw liquor and whitening various plastics.

C.I. fluorescent whitening agent 199 is China's brand name fluorescent whitening agent ER. Its chemical stability is good. It can be treated in the same bath with reductive bleaching agents and cationic softeners. The whiteness of whitening is very high, but its resistance to chlorine bleaching and sunlight fastness is not good. It is often used in whitening and brightening of polyacetate fibers.

Used for whitening of polyacetate raw liquor.

The main products are C.I. fluorescent brightener 184 (OB) and 393 (OB L). The maximum absorption wavelength of foreign manufacturers is 370 nm, and the fluorescence emission wavelength is 427 nm.

Because the quality of domestic raw materials is poor, the quality of domestic products is not as good as that of imported products, and its whiteness is low and yellowing easily. OB 1 1 can be used for whitening in hot melt because of its good heat resistance.