Manufacture of built-up roofing products with moisture conditioned fibrous mats

A method of manufacturing roofing felts, cap sheets, base sheets and similar built-up roofing products from fibrous mats includes: supplying a roofing mat to a manufacturing process; moisturizing the roofing mat by applying steam or a liquid mist to one or both major surfaces of the roofing mat duri...

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Bibliographische Detailangaben
Hauptverfasser:	LUNDHOLM, GARY ALLEN, OLSON, BRIAN FRANCIS, MICHELSEN, THEODORE W, LEMONIER, BYRON JAMES
Format:	Patent
Sprache:	eng
Schlagworte:	BUILDING FIXED CONSTRUCTIONS FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR GUTTERS LAUNDERING ROOF COVERINGS ROOF-WORKING TOOLS SKY-LIGHTS TEXTILES 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
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Beschreibung
Zusammenfassung:	A method of manufacturing roofing felts, cap sheets, base sheets and similar built-up roofing products from fibrous mats includes: supplying a roofing mat to a manufacturing process; moisturizing the roofing mat by applying steam or a liquid mist to one or both major surfaces of the roofing mat during the manufacturing process to increase the moisture content of the roofing mat and reduce the amount of hot bitumen accepted by the roofing mat during a coating operation; and applying a hot bitumen coating to one or both major surfaces of the roofing mat during the manufacturing process after the moisture content of the roofing mat has been increased by the moisturizing step.