Flashing article comprising a chlorinated polyethylene layer adhered to an asphalt-saturated felt layer produced by joining the two layers under pressure at elevated temperature

摘要

Roof drain flashing constituting a tough flexible material bondable to any type roof membrane and capable of accommodating thermal expansion and contraction of the roof without cracking and leaking at the drain, being a layer of nonplasticized chlorinated polyethylene integrally and irreversibly joined to a layer of asphalt-saturated roofing felt. The non- plasticized chlorinated polyethylene is physically joined to the asphalt- saturated felt by pressing the two together at pressures in the 4000 PSI range just subsequent to the CPE being extruded and cooled to the 250. degree. F range, having passed through the extrusion die at considerably higher temperatures.