| 摘要 |
22322223The purpose of the present invention is to provide a mat material that is less susceptible to reduction in holding power. The mat material of the present invention is a mat material comprising glass fibers wherein the mat material is characterized in that the glass fibers contain 52 to 66 wt% of SiO 9 to 26 wt% of AlO 15 to 27 wt% of CaO 0 to 9 wt% of MgO 0 to 4 wt% of TiO 0 to 5 wt% of ZnO and a total of 0 to 2 wt% of NaO and KO but contain substantially no BO. |
