| 摘要 |
<p>Disclosed are gas vapor treating mats consisting basically of (a) very small (e.g. average 6.3 microns) diameter glass fibers composed of a plurality of filaments and of short length about 6.35 mm long, and intermixed therewith (b) so-called micro-bits 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. The mats have good tensile strength and porosity to provide maintained good flow-through rates but yet being sufficiently dense to enable filtering finely divided solid particles and/or entrained liquid droplets from aerosols or gases and/or vapor streams, as well as coalescing liquid droplets entrained in them, and also capable of separating some gases from such streams.</p> |
