Polymeric films and packages produced therefrom

摘要

A gas permeable polymeric film laminate comprising two perforate polymeric films bonded together such that there are gas passages between the films from perforations in one film to perforations in the other film, the perforations having a minimum dimension of at least 20 mum and the passages having a maximum dimension of not more than 15 mum. Such films can be used as replacements for non-woven webs in packages consisting of a non-woven web bonded to substantially impermeable polymer webs, thereby avoiding fiber contamination which can occur with the latter.