Fibre-bonded fabric prodn. esp. for air or liq. filters

摘要

The continuous prodn. of fibre-bonded microfibre fabric (I) comprises spinning conductive polymer (II) from soln. or from the melt into an electrostatic field so that the microfibres obtd. are collected on a surface and laid down as non-woven fabric. (II) consists of a mixt. of two polymers which are mutually incompatible in soln. or in the melt, one of which (IIA) forms bonding microfibres and has a softening range (DIN 53736) at least 20 deg C below that of the other polymer (IIB) which forms the matrix fibres. Also claimed is a fibre-bonded, membrane-like, macroscopically smooth microfibre fabric (I) obtd. by the process.