Water-resistant water vapour-permeable oleophobic microporous polymer film

A flexible, liquid water resistant, water vapour-permeable oleophobic composite comprises a layer of water vapour-permeable, oleophobic, liquid water resistant microporous polymer film (I) adhered to an air-impermeable, water vapour-permeable polymer layer (II). (I) is expanded PTFE treated with an...

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Bibliographische Detailangaben
Hauptverfasser:	BUERGER, WOLFGANG, STEFFL, RUDOLF, FRAGSTEIN, RAINER VON, ZEHNDER, WOLFGANG
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ACCESSORIES FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR HUMAN NECESSITIES LAUNDERING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM OUTERWEAR PERFORMING OPERATIONS PROTECTIVE GARMENTS TEXTILES TRANSPORTING TREATMENT OF TEXTILES OR THE LIKE WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL WEARING APPAREL
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Beschreibung
Zusammenfassung:	A flexible, liquid water resistant, water vapour-permeable oleophobic composite comprises a layer of water vapour-permeable, oleophobic, liquid water resistant microporous polymer film (I) adhered to an air-impermeable, water vapour-permeable polymer layer (II). (I) is expanded PTFE treated with an oleophobic fluorocarbon and has an oil rating of at least 2, preferably at least 8. (II) is a polyurethane. (II) is adhered to a further layer (III) which is water vapour-permeable and liquid water resistant and optionally oleophobic. (III) is expanded PTFE treated with an oleophobic fluorocarbon. A textile layer can be laminated to one or both sides of the composite. PREFERRED PROCESS - (I) can be laminated to (II), or (II) can be laminated to a microporous polymer film that is water vapour-permeable and liquid water resistant and the composite treated with an oleophobic material.