Mineral Wool 2
Mineral Wool 2 : General. Man made mineral fibres (MMMF), spun from molten mineral and metal based slag, including (in order of fire resistance from lowest to highest) fibreglass, rockwool and ceramic fibre. A common error is to confuse the term mineral wool with rockwool. Rockwool is a mineral wool, but so is fibreglass and ceramic fibre. They are all based on minerals. For firestopping purposes, it is important to distinguish between the different types, as they have vastly different properties, which, when used incorrectly, can either add fire resistive properties, or completely null and void them. Mineral wool manufacturers are advocating the term 'man made vitreous fibres' in order to distance themselves from any association with asbestos, which, of course, is a designated substance, undeniably hazardous and carcinogenic. The fear is that the term 'mineral' is associated by some with 'mining', which then leads back to asbestos, which was mined. Theoretically, asbestos fibres could also be considered to be mineral wool, but this is not intended. Apart from that, only the man made mineral fibres (MMMF) are actually available to the general public in a true wool form. Health issues have arisen since the seventies, concerning man made mineral fibres. However, the IARC designation for man made mineral fibres is that of a possible carcinogen, just like coffee and pickled vegetables. More information on fibre health issues right here
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