Fuel conducting pipe

摘要

The pipe consists of an outer layer (12) and a thin inner layer (10) of a thermoplastic material with good properties of impermeability and chemical resistance to the fuel being transported. The outer layer is of a reticulable thermoplastic material such as PVC or polyethylene, and the inner layer is of a polyamide, such as PA11, PA12, PA6, or PA66, or a polyester such as PET or PBT, or a fluoridate cpd. such as PTFE, PFA or FEP. Alternatively, the pipe can have an intermediate layer of a polymer which enhances the adhesion between the outer and inner layers, selected from polyolefins such as polyethylene or polypropylene, e.g. modified to maleic anhydride, EVOH, EVA, polyurethanes and polyesters. Alternatively, there is an intermediate layer of rubber or vulcanisable elastomer, such as CSM, ECO, CR, NBR, H-NBR, X-NBR, POE or EPDM. The adhesive layer can be one marketed under the name of 'THIXON' or 'CHEMOSIL' (RTM).