MATERIAL DE ENCHIMENTO E FLUTUABILIDADE,PROCESSO DE FABRICACAO DO MESMO E ESTRUTURA TUBULAR

摘要

1. Filling and buoyancy material comprising a thermoplastic material and a mineral or organic lightening filler resistant to hydrostatic pressure, the material comprising between 50 and 80% by volume of a polyolefin or polydiolefin homo- or copolymer and between 50 and 20% by volume of hollow lightening filler resistant to hydrostatic pressure, characterised in that the said lightening filler comprises microspheres of the "flue dust" type appearing naturally in soot from thermal power stations operating on pulverised coal.