Mineral fibers decomposable in a physiological medium

摘要

The present invention relates to mineral fiber compositions useful for forming fibers which are readily degraded in a physiological medium such as that found within the human body. Advantageous compositions formed according to the present invention comprise the following components in the proportions by weight set forth below: -SiO2 37 to 58 wt. %; -Al2O3 4 to 14 wt. %; -CaO 7 to 40 wt. %; -MgO 4 to 16 wt. %; -P2O5 1 to 10 wt. %; -Fe2O3 up to about to 15 wt. %; - wherein the amount of CaO+MgO+Fe2O3 is greater than 25% and the total amount of Na2O+K2O is less than 7%. The total iron contained within the composition is expressed in the form of ferric oxide (Fe2O3).