Web polimerica micro bubble essencialmento impermeavel fluids, comprising the absorbent bandage fabric, process still apparatus for its formation,

摘要

A susbtantially fluid-impervious microbubbled polymeric web which produces very low noise levels upon movement has the following features: (a) it has a cloth-like surface with a pattern of discrete surface aberrations not individually discernible to the naked eye, (b) each aberration has its amplitude oriented substantially perpendicular to the surface of the web, (c) the end portion of each aberration comprises at least one microbubble which is much thinner than the base portion of the aberration, (d) the microbubble creates a discontinuity which reduces the resistance to compression and shear of the aberration as well as the overall flexural rigidity of the web.