| 摘要 |
<p>The invention refers to a bituminous shingle panel and a method of preparing thereof. A shingle panel has a carrying insert layer (2), coated on both sides with bituminous layers (3,4), having on one side a coat in the form of granular grit (5) applied to a top layer and coated with a protective foil on the bottom, which protective foil (6) has at least one regular external fold (7) on the surface of a shingle panel (1), favorably going lengthwise or crosswise to a shingle panel (1). A method comprises an impregnation of a carrying insert strip with a saturant, coating both sides of a carrying insert with bituminous masses, application of granular grit to one side of a resultant multilayer bituminous strip, application of a protective foil layer to another side of a resultant multilayer bituminous strip and cutting bituminous shingle panels out of a resultant multilayer bituminous material, where a protective foil strip (6) is of a width greater than a width of a multilayer bituminous strip, prior to being applied to a bottom surface of a multilayer bituminous strip undergoes lengthwise fold formation by letting a foil (6) through a gap between two adjustable and separated profiled jaws (9, 10) of a sheet die (11), active surfaces of which are provided with interlocking protrusions (12, 13).</p> |
