Development of Two-Layer Fuel Tube System Consisting of Adhesive-ETFE And Modified-PA12

As the evaporative emission control of cars becomes severe year by year, lower fuel permeation comes to be required as fuel tube in order to clear the regulation. Although the multi-layer fuel tube that has ETFE as an inner layer and PA12 as an outer layer is used now, development of a fuel tube with lower fuel permeation and better adhesion durability is required.

Considering these requirements, we introduced a functional group into ETFE, modified PA12, and successfully developed new two-layer fuel tube systems. The systems do not need any internal adhesive layer. The design of the systems is quite simple, and provides excellent fuel permeability, durability of adhesion and processability.