Resin pipe and resin molded component
AssigneeToyoda Gosei Co., Ltd.
InventorsZenichi Yasuda, Masanori Nojiri
Life of this patent
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Abstract
A filler pipe, wherein a flow path for a fluid is formed through multiple resin materials being extruded simultaneously and wherein a corrugated part is shaped through peaks and valleys disposed continuously, comprises an outer layer formed from a high density polyethylene, a barrier layer formed from EVOH with superior resistance to fuel permeation, and an inner layer, formed from high density polyethylene. The structure is such that d<L when the depth from the apex of the peak to the bottom of the valley is defined as d, and the distance from the apex of the peak to the barrier layer is defined as L.
Claims19
A resin pipe comprising a corrugated part formed to have alternating peaks and valleys, and a flow path in the corrugated part by extruding multiple resin materials simultaneously, the resin pipe comprising:
- an outer layer made of a first resin material;
- and
- a barrier layer that is formed on a flow path side of the outer layer and made of a second resin material that has resistance to fuel permeation superior to that of the first resin material, wherein
- the barrier layer is part of a simultaneous extrusion of multiple resin materials, so that the barrier layer chemically adheres to the outer layer, and
- the corrugated part is configured to have a relation of d<L, where d is a depth from an apex of a peak to a bottom of a valley, and L is a distance from the apex of the peak to an outer surface of the barrier layer.
A resin pipe comprising a corrugated part, which has alternating peaks and valleys, and a flow path that is formed in the corrugated part by a simultaneous extrusion of multiple resin materials, the resin pipe further comprising:
- an outer layer made of a first resin material;
- and
- a barrier layer that is formed on a flow path side of the outer layer and made of a second resin material that has resistance to fuel permeation superior to that of the first resin material, wherein
- the corrugated part is configured to have a relation of d<L, where d is a depth from an apex of a peak to a bottom of a valley, and L is a distance from the apex of the peak to an outer surface of the barrier layer, and
- the resin pipe further comprises an inner layer that is layered on a surface on the flow path side of the barrier layer and made of a third resin material that is durable when exposed to fuel.
Dependencies are inferred from the claim text.