Multilayer tube
OwnerMasatomi Satoinventor
Life of this patent
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Abstract
There is provided a multilayer resin tube having a plurality of thermoplastic resin layers, wherein an intermediate layer of the resin layers comprises an acid modified resin modified by the introduction of a functional group, and at least one layer is a barrier layer comprising an aromatic polyamide, for example, PA9T. The multilayer resin tube has good low-permeability attained with the use of an inexpensive resin, without using an expensive highly-functional resin such as a fluororesin.
Claims25
A multilayer resin tube having a multilayer structure of a plurality of thermoplastic resin layers, wherein an intermediate layer of the plurality of resin layers comprises an acid modified resin modified by the introduction of a functional group, and at least one adjacent layer is a barrier layer comprising an aromatic polyamide as a main component.
A multilayer resin tube having a multilayer structure of three or more thermoplastic resin layers, said tube having a barrier layer comprising an aromatic polyamide as a main component, wherein an outer layer and an inner layer, lying outside and inside the barrier layer, each comprise an acid modified resin modified by the introduction of a functional group.
A multilayer resin tube having a multilayer structure of three or more thermoplastic resin layers, said tube comprising a barrier layer comprising an acid modified aromatic polyamide, modified by the introduction of a functional group, as a main component, and an outer resin layer and an inner resin layer, both adjacent to the barrier layer.
A multilayer resin tube having a multilayer structure of three or more thermoplastic resin layers, said tube having a layer comprising an acid modified resin modified by the introduction of a functional group, wherein an inner layer, lying inside the acid modified resin layer, is a barrier layer comprising an aromatic polyamide as a main component.
A multilayer resin tube having a multilayer structure of three or more thermoplastic resin layers, wherein a layer lying inside the outermost resin layer is a barrier layer comprising an acid modified aromatic polyamide, modified by the introduction of a functional group, as a main component.
A multilayer resin tube having a multilayer structure of three or more thermoplastic resin layers, wherein the outermost resin layer comprises an acid modified resin modified by the introduction of a functional group, and a layer lying inside the acid modified resin layer is a barrier layer comprising an aromatic polyamide as a main component.
A multilayer resin tube having a multilayer structure of five or more thermoplastic resin layers, wherein, in order from the outermost resin layer, the first layer is a PE (polyethylene) resin layer, the second and fourth layers are each an acid modified PE (polyethylene) resin layer, the resin being modified by the introduction of a functional group, and the third or fifth layer is a barrier layer comprising an aromatic polyamide.
Dependencies are inferred from the claim text.