| 摘要 |
Mats for filtering gases consist basically of (a) a major proportion of glass fibers composed of a plurality of filaments and about 0.635 cm. long, and intermixed therewith (b) a minor amount of microbits of (i) an expanded thermoplastic styrene-polymer and/or lower polyolefin and/or (ii) a flexible foamed polyurethane, each of the members (i) and (ii) being non-brittle in expanded form, and (c) a minor amount of (i) an organic binding agent insoluble in cold water, but soluble in hot water and inert to the glass fiber and the polymer micro-bits and any other constituent of the mat as well as to the contents of the gaseous and/or vapor stream to which the mat is to be exposed, or (ii) a cobeat of wet lap cotton fibers and micro-bits. A gas separation embodiment of these mats also includes polyester fibers and activated carbon. |
