Durable flame retardant for textile, THPC and THPC-U is well-known by Proban processing, finished fabric can hold favorable retardancy after 50 times washing, the fire retardancy of finished fabric can reach B1 grade according to GB 17591—2006.

  PROBAN is a durable flame retardant for post-treatment of cellulose fibers and their blends. Its main chemical component is tetrakis hydroxymethyl Phosphonium chloride (THPC). The process of using PROBAN is: dip rolling drying ammonia fumigation oxidation water washing. 

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 Durability of PROBAN Flame Retardant Fabric

 PROBAN flame retardant is a small water-soluble molecule at first, so it is easy to immerse into cellulose fibers After ammonia fumigation, small RORAN molecules immersed in the cellulose fiber are cross-linked into water-insoluble polymer molecules, which are permanently stuck in the fiber.

 After PROBAN treatment, the content of phosphorus (P) and nitrogen (N) elements in the fabric can be accurately tested to determine how much PROBAN flame retardant is on the fabric. Changes of P and N values of pure cotton sheets treated with PROBAN during 200 times of washing. In the previous washing, the P and N values decreased significantly, because the PROBAN polymer on the surface of the fabric was washed away, while in the subsequent washing, the P and N values decreased very little, which was caused by the wear of the fabric during the washing process. However, it was not appropriate to use the washing powder containing soap powder after washing. The use of sodium hypochlorite bleach should also be avoided.

 In a word, as long as the precautions for washing are followed, the flame retardancy of the fabric treated with PROBAN will effectively maintain its long-term flame retardancy.

Suggested Formulation:

270 - 650 g/l THPC-U

20 - 60 g/l Softener

2 - 4 g/l AEO

Rolling liquid rate: about 80%

Drying: 100 - 130 ° C

Processing: