| 摘要 |
A fibrous structure, for example, a batt, mat, blanket, felt, cloth, paper or board, comprising staple fibers of polycrystalline alumina, alumina/silica, or zirconia having an average diameter of 0.5 to 5 microns, not greater than 20% by number of the fibers having a diameter greater than 5 microns and the shot content of the fibers being less than 5% by weight. |
