FLAME RETARDANT FINISH

SUBMITTED BY :-Ravi bhushan Ritesh raman

Textiles consist of highly ignitable materials and are the primary source of ignition. They contribute to rapid fire spread

However, reduction of ignitability can be obtained by :-

1: Use of Inorganic materials {Asbestos, Glass etc}

2: Through chemical treatment with FR {Flame Retardant chemicals}

3: Through modification of the polymer.

• Cotton and linen also have a high burning rate

• Acetate and triacetate are as flammable or slightly less flammable than cotton

• Nylon, polyester and acrylic tend to be slow to ignite but once ignited, severe melting and dripping occurs.

• Wool is comparatively flame-retardant

• Glass fibers and monoacrylic are almost flame-resistant

Flammability of Fabrics

• The flammability of fabric can be drastically reduced through the use of fire retardants

• Resistant to catching fire.

• Flame retardants are chemicals used in textiles and leather goods that inhibit or resist the spread of fire

• Fire retardant fabrics are textiles that are naturally more resistant to fire than others through chemical treatment or manufactured fireproof fibers.

Flame retardant

Features of flame retardant chemicals•Suppress smoke generators

•Will not stain most fabrics

•Can be sprayed, brushed, rolled on or dipped

•Non hazardous

•Non toxic

•Dries clear

When exposed to flame, fire retardant chemicals cause a reaction that changes the gases and tars in the fabric to carbon char. Flame retardant fabric would eventually burn if exposed to flame long enough. Slowing the rate of burning however, is a big advantage during a fire

How Do Chemicals Work?

They interfere with combustion at various stages of the process e.g. during heating, decomposition, ignition of flame spread. Fire is gas phase reaction. For a substance to burn, it must become a gas. As with any solid, a textile fabric exposed to a heat source experiences a temperature rise. If the temperature of the source is high enough and the net rate of heat transfer to the fabric is great,pyrolytic decomposition of the fiber substrate will occur. The combustible gases mix with the ambient air and its oxygen. The mixture ignites, yielding a flame, when its composition and temperature are favorable. Part of the heat generated within the flame is transferred to the fabric to sustain the burning process and part is lost to the surroundings.

Function of a Flame Retardant:

• permanently fire retardant, or durably fire retardant, the flame retardancy will last for the life of the fabric. The drapery can be laundered or dry-cleaned as recommended by the drapery manufacturer

• Non –durable fire retardant, that have been topically treated with chemicals, the flame retardancy of the fabric will dissipate over time, particularly with repeated cleaning. These fabrics must be dry-cleaned with a non-liquid cleaning agent.

• Typically, the flame retardancy of topically treated fabric is certified for one year

Durability of flame retardant

APPLICATION

Kevlar vest Fire fighter dress

Space traveller dress Kids wear