The flame retardants are applied for impregnation of fabrics (woven and non-woven) used for curtains, upholstery, carpets, moquettes, textile wall-papers, technical textiles etc. The impregnation is obligatorily performed after a preliminary treatment of the textile material by cleansing, washing and drying whereby the used agents’ solutions should be “compatible” with the impregnating water solution.
The fire protection of the textile materials may be applied by “in situ” impregnation utilizing the spraying method and by the continuous method – soaking, draining and drying at high temperature. The aim of the impregnation technologies is to reduce the fabric flammability – the material is fire resistant, smolders and chars only in the presence of a fire source and extinguishes after its removal.

The fabric flame retardant impregnation by spraying is “in situ” impregnation at atmospheric pressure and room temperature. The impregnation by spraying is carried out by means of an air pistol from a distance of at least 40 cm, strictly observing the relevant consumption rate for the respective material. So treated, the materials are dried at room temperature.
The flame retardant impregnation by spraying is one-side impregnation for the light and thin fabrics and two-side for the thick and heavy ones.
The quantity per square meter of the material is preliminary determined and satisfies the requirements of the desired fire rating.

The machine impregnation is a continuous treatment method, where the non-treated material passes through a bath with a small module, containing the flame retardant. After soaking in the bath, the material passes between rollers, where, applying controlled pressure it is drained so that only the specified quantity of the flame retardant remains in the material, and after that it passes at an appropriate speed and at temperature, appropriate for drying the respective material, through a drying machine.

The impregnated textile materials can be cut out, sewn and assembled without reduction in their fire resistance.
The impregnated textile materials are environment friendly. No rashes or erythema of the skin of people, working with the fabrics, which is an evidence of the absence of toxic properties.

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The flame retardants reduce the likelihood of a fire starting, hinder the spread of a fire, slow down the initial burn rate and thereby can help increase the time to flashover, giving the occupants more time to escape. The flame retardants are applied for fire protection of softwood – pine, fir, lime, ash, hardwood – oak, beech, cherry and wood products – particle based wood, fiber based wood, MDF, OSB, plywood.

Wood materials, impregnated with the flame retardants may be treated with paints and polishes, after performing tests for compatibility with the used solutions of the flame retardants and the impregnation technology. The compositions of the flame retardants, applied to wood may be combined also with biocide protection additives – against development of moulds, mildew etc.

The flame retardant impregnation may be applied “in situ” by spraying, by brush, by roller, dipping, pouring and plasma-aided impregnation. The flame retardant treated materials are dried at room temperature about 20oC.

The fire protection of the wooden materials may be carried out under pressure in an autoclave. The drying takes place in a drier at atmospheric pressure. One of the disadvantages of the impregnation of the wood building elements under pressure is the loss in strength parameters – up to 30 percents.

The impregnated wood materials are “Class B1”, “Class Bfl-s1” and “Class B-s2,d1” according to DIN 4102, BDS EN ISO 11925-2, BDS EN ISO 9239-1, EN 13823:2010.

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The flame retarded materials are with low smoke developed indexes. They are with sufficient physical and mechanical properties. They have better biodegradability in comparison with the untreated paper and corrugated board.

The fire protection of the corrugated board is carried out “in situ” by brush or roller.

The high capillary activity of the flame retardant allows fire protection of the paper and the corrugated board by a continuous process – the non-treated material passes through a bath with a small module, containing the flame retardant and after that it passes at an appropriate speed and at temperature, appropriate for drying the respective material, through a drying machine.

They are with increased resistance to ignition, slow down burning rates and the rate of heat, smoke and toxic gas release from the cellulosic polymers.

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