| 摘要 |
The invention provides a method of connecting a first polyolefin pipe element (1) to a second pipe element (3) by electrofusion, the first polyolefin pipe element (1) prior to electrofusion jointing having a substantially intact oxidised surface layer (9), which method comprises providing a surface of one of the pipe elements (3) which surface is to be fused to a surface (9) of the other pipe element (1), with a surface layer of a polymer composition containing at least 0.1 % of an adhesive polymer derived from epoxy or unsaturated acyl compounds. The invention also provides an electrofusion coupling device having a surface formed of a polymer composition containing at least 0.1 % by weight of an adhesive polymer. |
