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1. (WO2017056846) FILLER TUBE AND METHOD FOR MANUFACTURING SAME

Pub. No.:    WO/2017/056846    International Application No.:    PCT/JP2016/075783
Publication Date: Fri Apr 07 01:59:59 CEST 2017 International Filing Date: Sat Sep 03 01:59:59 CEST 2016
IPC: B60K 15/04
B29C 49/00
B29C 53/08
B29C 57/02
B29C 69/02
B29D 23/18
F16L 11/08
Applicants: SUMITOMO RIKO COMPANY LIMITED
住友理工株式会社
Inventors: FUKUYASU, Tomoyuki
福安 智之
SHIMOJO, Makoto
下條 誠
MIYAJIMA, Atsuo
宮島 敦夫
HATANAKA, Kazuki
畠中 一樹
Title: FILLER TUBE AND METHOD FOR MANUFACTURING SAME
Abstract:
Provided is a filler tube that is capable of favorably complying with a request function that corresponds to a bellows section and a non-bellows cylindrical base section, while ensuring fuel-permeability resistance properties and weld strength and at the welding surface. A filler tube (30) is provided with a non-bellows cylindrical base section (31) measuring 2–4 mm in total wall thickness, a bellows section (32) measuring 0.5–3 mm in total wall thickness, and a flange part (35) measuring 3.5–5 mm in total wall thickness and having an end surface that is welded to a fuel tank (10). The base part (31), the bellows part (32), and the flange part (35) are provided with inner layers (31a, 32a, 35a) formed to a thickness that is 40–60% of the total wall thickness and principally formed of high-density polyethylene (HDPE), intermediate layers (31b, 32b, 35b) having fuel-permeability resistance properties, and outer layers (31c, 32c, 35c) for protecting the intermediate layers (31b, 32b, 35b).