MINERAL WOOL ELEMENT WITH ENHANCED REACTION TO FIRE, AIR DUCT COMPRISING SAME

摘要

The invention concerns an element consisting essentially of mineral wool exhibiting enhanced reaction to fire. Such an element is in particular shaped in the form of a panel and is used for constructing air ducts. The panels comprise a mineral wool core, said core being formed with glass fibres which act as wool constituents. The glass fibres of the inventive element have a diameter substantially greater relative to the glass fibres currently used for making panels or ducts for similar purposes. The glass fibres used in the invention have a fineness index of value ranging between 5.8 < 0.5 for 6 grams. The invention also concerns a method for making an air duct from said panels.