Treatment of tough inorganic fibers and their use in a mounting mat for exhaust gas treatment device

A method of treating tough inorganic fiber bundles including opening a plurality of the tough inorganic fiber bundles such that tough inorganic fibers can be dispersed in a liquid slurry to lay down a homogenous fiber aggregate， wherein the tough inorganic fibers have a crush settle volume of greater than 250 ml， optionally greater than 450 ml. Also， a method of treating tough inorganic fiber bundles including dispersing a plurality of the tough inorganic fiber bundles in a slurry with a dilution of about 0.1% to about 2%， optionally about 0.1% to about 1%， effective to lay down a homogenous fiber aggregate， wherein the tough inorganic fibers have a crush settle volume of greater than 250 ml， optionally greater than 450 ml.

一种硬质无机纤维束的处理工艺，包括对多束该类纤维束进行开纤处理，使单根硬质无机纤维可分散于液浆中，进而形成均匀的纤维聚集体；其中所使用的硬质无机纤维的压溃沉降体积（Crush Settle Volume）大于250毫升，可选参数为大于450毫升。此外，另一类硬质无机纤维束的处理工艺包括：将多束该类纤维束以约0.1%至约2%的稀释浓度（可选范围为约0.1%至约1%）分散于浆料中，该分散工艺可有效得到均匀的纤维聚集体；其中所使用的硬质无机纤维的压溃沉降体积大于250毫升，可选参数为大于450毫升。