PROBAN® finished fabrics retain their flame retardant properties for the lifetime of the garment. Fabrics acquire their flame retardant properties from the polymer which is embedded into the fabric. It can only be removed by powerful oxidising agents. See wash factors to be avoided
When exposed to flame, PROBAN® fabrics form an insulating char, this stays in place and helps protect the wearer. PROBAN® fabrics do not smoulder, have no afterglow, do not melt and the flame doesn't spread outside the charred area.
PROBAN® is both a chemical and a quality controlled technological process, treatment takes place at the finishing stage of cotton and cotton blended textile manufacture.
The PROBAN® process involves chemical impregnation. Drying and curing with ammonia gas using Rhodia's patented licensed technology followed by oxidation and finally neutralisation.
|The process of polymer formation is irreversible. The polymer is completely insoluble and is embedded in the body of the fibre. The polymer can only be removed by powerful oxidising agents, particularly in the presence of metal ions. See wash factors to be avoided.|
|1.||Molecules are sufficiently small and linear to penetrate the internal areas of the cotton fibre. Some chemical will be present in the spaces between the fibres.|
|2.||Drying removes excess moisture and prepares the fabric for curing.|
|3.||Dried fabric is cured with ammonia gas. This causes the small molecules to cross link and form a polymer. The polymer is then physically trapped and fixed in the core of each fibre.|
|4.||A final oxidation and neutralisation treatment completes polymer fixation and removes any residual by-products.|