| 摘要 |
A method for the manufacture of a heat fusion fitting, which comprises i) forming a body ( 1 ) comprising at least a first layer of a first cross-linked polymeric material, ii) embedding or partly embedding a ferromagnetic heating element ( 11, 12 ) in a second polymeric material ( 13, 14 ) to form an insert ( 7, 8 ), the ferromagnetic heating element ( 11, 12 ) having a Curie temperature equal to or greater than the crystalline melting point or softening point of the second polymeric material ( 13, 14 ), and iii) assembling the body and the insert ( 7, 8 ) to form the fitting.
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