초록 ▼

A method of directing extruded synthetic fibers toward at least one surface of a mineral fiber insulation batt, and corresponding apparatus and resulting product. In certain embodiments, a row of extrusion heads is provided for directing extruded synthetic fibers (e.g. fibers including ethyl vinyl a

A method of directing extruded synthetic fibers toward at least one surface of a mineral fiber insulation batt, and corresponding apparatus and resulting product. In certain embodiments, a row of extrusion heads is provided for directing extruded synthetic fibers (e.g. fibers including ethyl vinyl acetate or EVA) toward a surface(s) of the batt(s) to be impregnated with same. optionally, extrusion heads may be provided all around the batts so as to impregnate substantially all surfaces thereof with the extruded synthetic fibers. As the fibers exit the heads, they are hit with pressurized heated air streams which cause them to go into an insipid spin which increases directional tensile strength of the resulting batt in all directions. In certain embodiments, every other batt of a plurality of batts passes over an elongated member which extends over top of the conveyor in order to more efficiently impregnate edge surfaces of the batts.

대표청구항 ▼

[ We claim:] [1.] A method of impregnating at least one major surface of a mineral fiber insulation batt with extruded fibers that include ethyl vinyl acetate (EVA), the method comprising the steps of:conveying the mineral fiber insulation batt via a conveyor in a conveying direction, the batt inclu

[ We claim:] [1.] A method of impregnating at least one major surface of a mineral fiber insulation batt with extruded fibers that include ethyl vinyl acetate (EVA), the method comprising the steps of:conveying the mineral fiber insulation batt via a conveyor in a conveying direction, the batt including a top major surface, a bottom major surface, and first and second opposing edge surfaces;providing a plurality of extrusion heads over top of the batt being conveyed so that the top major surface of the batt passes beneath the plurality of extrusion heads during said conveying step, each of the extrusion heads including an extrusion orifice through which molten ethyl vinyl acetate (EVA) is forced so as to form extruded fibers which include ethyl vinyl acetate;extruding the ethyl vinyl acetate inclusive fibers from the plurality of extrusion heads and directing the extruded fibers onto the top major surface of the batt being conveyed via the conveyor; andallowing the extruded fibers to cool or cure on the top major surface of the batt so that during the cooling the extruded fibers shrink and become interlocked with mineral fibers of the batt thereby impregnating the top major surface of the batt with the extruded fibers.