Flame retardant for cotton
First method
By depositing insoluble metallic compounds,
the effect of fire proofing obtained is permanent as it does not wash out
Out of all, Antimony Oxychloride is the best. It is precipitated on the fibre by the double deconposition of tartarernetic and Stannic Oxychloride. and then washed in running water.
Out of all, Antimony Oxychloride is the best. It is precipitated on the fibre by the double deconposition of tartarernetic and Stannic Oxychloride. and then washed in running water.
In the same manner, Metallic salts such as
Magnesium Borate, Ammonium Sulphate and Magnesium Silicate also produce fire
proofing
Second method
Soluble compounds such as Borax, Sodium
Phosphate are used. A mixture as given below is found to be effective for this
finish. Borax - 50 parts
Boric Acid - 35 parts
Sodium Phosphate- 15 parts
Only 5 % solution of the mixture is used. Most
of the fire proofing agents can be fixed by synthetic resins.
Tetrakis hydroxy Methyl Phosphonium Chloride (THPC) when used with Urea and Methylol Melamine produce good wet fastuess flame proofing properties.
Tetrakis hydroxy Methyl Phosphonium Chloride (THPC) when used with Urea and Methylol Melamine produce good wet fastuess flame proofing properties.
The fabric is padded through the solution
containing,
THPC - 15.8 %
Methylol melamine - 9.5 %
Tri ethanol aminie - 3 %
Urea - 9.9 %
Dried and cured at 140°C for s minute and
washed.
This process is known as 'Proban' finishing
This process is known as 'Proban' finishing
PROCESS SEQUENCE
Pad - Dry - Cure
