Abstract: An elongated multi-layer tubing for connection to a motor vehicle system to handle fluids containing hydrocarbons. The tubing comprises an inner layer disposed radially innermost and having an inner surface capable of prolonged exposure to a fluid containing hydrocarbons, the inner layer formed from an extrudable, melt-processible thermoplastic, such as Nylon 12. An outer jacket layer is formed from an extrudable, melt-processible thermoplastic, such as a thermoplastic elastomer (TPE). The tubing further comprises an anhydride-modified, linear low-density polyethylene intermediate layer extruded between the inner and outer layers, the intermediate layer sufficiently adhering the inner layer to the outer jacket to substantially prevent slipping therebetween. At least one of the inner and intermediate layers is resistant to permeation by hydrocarbons. At least one layer of the tubing is capable of dissipating electrostatic energy in a range of 104 to 109 Ohm/cm2.

Abstract: A polymeric, multiple-layer tube suitable for use as a filler neck is disclosed. The tube is comprised of a generally cylindrical wall having an outer surface and an inner surface. The inner surface is approximately parallel to the outer surface and defines a generally cylindrical interior having a diameter D. The cylindrical interior, which provides a flow path for fuel, extends throughout the length of the tube. The tube is divided into one or more contiguous first and second longitudinal segments. In the first longitudinal segment, D is approximately constant along the length of the segment; in the second longitudinal segment, D varies with axial position. This variation defines a convolution, which allows the filler tube to be bent without crimping. The cylindrical wall of the multiple-layer tube further comprises an outer layer composed of a thermoplastic elastomer, and an inner layer composed of an extrudable melt-processible thermoplastic having an elongation of at least 150%.