A filler tube, which is capable of satisfying required functions suitably in compliance with the bellows and non-bellows cylindrical base while securing weld strength and fuel-permeation resistance property in the weld face, is provided. A filler tube includes a non-bellows cylindrical base with a total thickness of from 2 to 4 mm, a bellows with a total thickness of from 0.5 to 3 mm, and a flange having a total thickness of from 3.5 to 5 mm, and including an end face to be welded to a fuel tank. The non-bellows cylindrical base, the bellows, and the flange include inner layers formed so as to have a thickness accounting for from 40 to 60% of the total thicknesses, and formed of high-density polyethylene (or HDPE) serving as the major constituent, intermediate layers exhibiting fuel-permeation resistance property, and outer layers protecting the intermediate layers.
FILLER TUBE AND MANUFACTURING PROCESS FOR THE SAME
17.08.2017
Patent
Elektronische Ressource
Englisch
PROCESS FOR MANUFACTURING FILLER TUBE AND FILLER TUBE
Europäisches Patentamt | 2018
|METHOD FOR MANUFACTURING FILLER TUBE, AND FILLER TUBE
Europäisches Patentamt | 2018
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