| 摘要 |
Device for the impregnation of sheets of elastic foamed resin with thermoplastic substances. In particular said sheets, due to their particular molecular structure, once impregnated with bitumen and conveniently compressed, can keep the bitumen ensuring a good impermeabilization. For these reasons they find a good application in the building sector. In particular the device comprises driving and guiding means of the foamed resin sheet, a hopper fed with bitumen and two calendering rollers. The calendering rollers are heated and have, respectively, an external surface with lattice shape and an external surface coated with an elastomer material resistant to high temperatures. |
