| 摘要 |
he invention relates to foamed elastomer heat-insulating pipes enclosed by a polymer membrane, which membrane is incorporated thereto by means of an elastomer glue layer to endow pipes with homogenous behaviour. In case that two-layered heat-insulating pipes are used in heating, cooling, air-conditioning systems or in hydraulic installations and solar energy layers, the hereinbefore described membrane incorporation aims at improving in one hand the resistance to ultra-red radiation what increases the service life of the heat-insulating pipe by 10 times and, on the other hand, the resistance to vapors diffusion what rises the efficiency of permeability up to 80%. |
