| 摘要 |
Polyether-polyurethane foam materials impregnated with bitumen are disclosed . These foam materials find use as sealing strips against moisture, draughts a nd dust, particularly in the construction of roofs and walls of a building with overlapping formed metal or cement or similar sheets where a strip is insert ed in the overlap of two adjacent sheets to provided the required sealing therebetween. The sealing strips can also be used to seal adjacent tiles on a roof between the underside of the tile and its supporting batten or rafter. The bitumen may be a bitumen emulsion, hot bitumen or kerosene-diluted bitumen. The concentration of bitumen in the foam materials can be in excess of 600 kg/m3.
|
