| 摘要 |
The glass compositions of the present invention contain 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 biosolubility. The compositions further include relatively high amount of Na2O + K2O + MgO + CaO, which tends to increase fiber biosolubility 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 below about 1800 DEG F (982 DEG C) and viscosities above 300 Poise at the liquidus temperature. For higher B2O3 compositions the liquidus temperatures are below 1650 DEG F (899 DEG C), and the viscosities are above 1,000 Poises at the liquidus temperatures.
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