Enhanced barrier film and laminate and method for producing same

A breathable barrier film laminate having a microporous multilayer film (24) formed by extruding a polymer loaded with a filler having a particle size suitable for pore formation, hot blowing the extruded film, forming a hot blown film bubble (47), collapsing the hot blown film bubble, forming a mul...

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Bibliographische Detailangaben
1. Verfasser:	MICHAEL P MATHIS
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A breathable barrier film laminate having a microporous multilayer film (24) formed by extruding a polymer loaded with a filler having a particle size suitable for pore formation, hot blowing the extruded film, forming a hot blown film bubble (47), collapsing the hot blown film bubble, forming a multilayer film and stretching the multilayer film, forming a plurality of micropores, and a nonwoven web material layer (23, 25) bonded to at least one surface of the microporous multilayer film. The breathable barrier film laminate is particularly suitable for use in protective apparel such as surgical gowns, surgical drapes, and coveralls.