Method for producing metalized fibrous composite sheet with olefin coating

摘要

A composite sheet is manufactured by depositing a multi-layer coating on the outer surface of a substrate, the coating comprising a metal layer and an outer polymeric layer formed from a precursor comprising a composition capable of being polymerized and/or cross-linked by free-radical processes. After the precursor is applied, the composite sheet is exposed to beam radiation and ozone, which both promote conversion of the precursor. The function of the cured polymeric layer includes protecting the metal layer from corrosion. The use of both beam radiation and ozone promotes substantially full conversion and curing of the precursor, even in portions of the substrate that are geometrically shadowed from incident beam radiation.

主权项

1. A process for manufacturing a composite sheet comprising:
providing a substrate having a first outer surface and an opposing second outer surface, the substrate comprising a nonwoven sheet selected from the group consisting of flash-spun plexifilamentary sheets, spunbond nonwoven sheets, spunbond-meltblown nonwoven sheets, spunbond-meltblown-spunbond nonwoven sheets, and laminates that include a nonwoven sheet or scrim bonded to a moisture vapor permeable film layer; metalizing the first outer surface of the substrate to form thereon a metal layer; depositing on the metal layer a precursor of an outer polymeric coating layer to form a precursor film, the precursor comprising a composition capable of being converted by free-radical processes; and treating the precursor to form the outer polymeric coating layer, the treating comprising:
creating free radicals in the precursor to induce conversion of at least a portion thereof, the creating comprising exposure of the precursor film to ozone and irradiating the first outer surface with beam radiation provided by a radiation source.