For wood

image21

Wood is a traditional natural construction material for attractive, ecological and comparatively inexpensive construction and repair works.The wood products such as floors, wall and ceiling panels, roofs, timber, beams or columns are universal building elements. The wooden materials are widely used in the interior of homes, public buildings and transportation means. 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.

Copyright © Mantechship.com