| 摘要 |
<p>The flexible thermally insulated conduit has a medium guided inner pipe, an outer pipe surrounding that inner pipe and a heat insulating layer provided between that inner pipe and outer pipe on the basis of polyurethane or polyisocyanurate. The hollow balls are added to the foam, where the hollow balls have a covering of a thermoplastic plastic and are filled with a medium, which causes blowing of the covering at increased temperature. An independent claim is included for a method for production of a thermally insulated conduit.</p> |
