| 摘要 |
<p>A process and apparatus for the continuous preparation of sound, heat and flame insulating material comprising a fiber material, e.g. disintegrated paper, such as newsprint, and a powdery, fireproof-making substance, e.g. a pulverized boric acid containing mixture, in which the fibers and the powder mixture are subjected together in dry condition to the action of a hammer mill or the like. The non-disintegrated material is subjected together with the powder mixture to the comminuting beating or hammering action, and the components are beaten until the desired release of fibers and the desired mixed homogeneity of the fiber and powder components has been achieved, whereafter the final product is removed.</p> |
