Patent ID: 8334228

Claim:
A fiberglass composition comprising: SiO 2 58~65% by weight, CaO 20~26% by weight, Al 2 O 3 9~17% by weight, MgO 0.5~1% by weight, B 2 O 3 0~5% by weight, F 2 : >0~1% by weight, TiO 2 0.1~1% by weight, R 2 O = K 2 O + Na 2 O 0~0.8% by weight, Fe 2 O 3 0.1~0.5% by weight, SO 3 : >0~0.6% by weight, RO = CaO + MgO 21~27% by weight, and wherein the component content follows the following proportional relationship: 21<Z1=RO/MgO<43.