Bio-soluble glass fiber composition that has a minimised residence time in lung, decreasing the subsequent lung associated disease

摘要

A glass composition containing at least 2.0 wt % Al2O3 to give resulting glass fiber an acceptable chemical durability for product performance, but no more than 3.0 wt % to ensure the fiber maintains a relatively high bio-solubility. The composition further includes relatively high amounts of Na2O+K2O+MgO+CaO, that tends to increase fiber bio-solubility and allows for the use of reduced amounts of B2O3 in the composition. The glass compositions have KI values that generally equal or exceed a KI value of 40 and are suitable for rotary processing. The compositions have liquidus temperatures TL (oF) below 1800oF and viscosities above 300 Poise at the liquidus temperature. For higher B2O3 compositions the liquidus temperatures are below 1650oF, and the viscosities are above 1,000 Poises at the liquidus temperatures.