JP2540253Y2 - Double reciprocating plastic tube - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double reciprocating plastic pipe used as a communication pipe for heating and cooling and a circulation pipe for bath.

[0002]

2. Description of the Related Art A reciprocating double plastic pipe is often used for piping for heating and cooling, and the piping work is generally performed using a sheath pipe. The reciprocating double plastic pipe is formed by binding two vertically attached plastic pipes using a binding tape in which an aluminum foil is laminated and adhered to a film base material such as polyethylene terephthalate. Normal.

[0003]

The plastic pipes intended for this type of pipe have a certain degree of rigidity, while the aluminum foil which functions as a heat-blocking layer of the binding tape usually has a wall thickness of 5 to 50. It is about micron (μ), and together with the presence of this aluminum foil layer, the flexibility of the plastic pipe around which the binding tape is wrapped is impaired, which hinders the work of inserting and laying in the sheath. become.

Although the binding tape is formed with an aluminum foil as a surface layer, no consideration is given to the protection of the surface layer by the aluminum foil. Often, the aluminum foil layer is destroyed by such factors, and a protective measure has been desired.

The present invention has solved the above-mentioned problem, and its purpose is to prevent the flexibility of the two bound plastic tubes from being impaired, so that the heat insulation layer of the binding tape has its own thickness. Another object of the present invention is to provide a double reciprocating plastic tube improved so that an aluminum vapor-deposited layer can be made thinner while the aluminum vapor-deposited layer can be protected by a coating layer.

[0006]

In order to achieve the above object, a double reciprocating plastic tube characterized by the present invention has a thickness on the outer peripheral surface of two reciprocating crosslinked polyethylene pipes vertically attached to each other. Is 1 to 100μ polyethylene terefu
The tape tallates film layer and the Thickness is a three layer laminate of aluminum deposited layer and the thickness of the acrylic resin layer of 0.1~100μ are sequentially laminated adhesion 100～10000A, pipe side the polyethylene terephthalate film layer And spirally wound without gaps.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. Reference numerals 1 and 2 denote two cross-linked polyethylene pipes constituting a reciprocating double pipe. The two pipes 1 and 2 are vertically attached to each other, and a binding tape 3 is provided on the outer peripheral surface thereof without any gap. Spiral wound. The tape 3 has a thickness of 1 to 100 μm as shown in FIG.
A polyethylene terephthalate film layer 3a and Thickness are aluminum deposited layer 3b and the thickness of 100~10000Å of
There consists a three layer laminate of acrylic resin layer 3c of 0.1~100μ are sequentially laminated and adhered, the polyethyleneterephthalate
The phthalate film layer 3a is wound around the pipes 1 and 2 to form a reciprocating double plastic pipe.

In the above construction, the cross-linked polyethylene pipes 1 and 2 have an inner diameter of about 5 to 20 mm and a thickness of 1 to 3 mm.
mm, and the thickness of the aluminum deposition layer 3b is
Is less than 100 °, the effect of heat insulation is thin, and it is easy to tear
Can't be used, and more than 10000Å
Since it is not preferable, the thickness is practically 300 to 1000
Å is desirable. And aluminum deposition layer
3b is protected by the acrylic resin layer 3c.
In the drawings, reference numeral 4 denotes a resin film holding tape for preventing the tape 3 from rolling back, and reference numeral 5 denotes an electric wire.

[0009]

The present invention is as described above, and there is little friction between the cross-linked polyethylene pipe and the polyethylene terephthalate film layer, and the binding tape has a thick heat-blocking layer. Because it is formed of an aluminum vapor-deposited layer that can reduce the thickness, it is easy to bend as a whole, and the pipe and tape are relatively slippery and can be bent easily. It is convenient. Further, the aluminum vapor deposited layer is protected by an acrylic resin layer, and has excellent practical value, such as excellent durability.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention with a part thereof peeled off.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view of the tape.

[Explanation of symbols]

1, 2 are pipes, 3 is a tape, 3a is a saturated polyester resin film layer, 3b is an aluminum vapor-deposited layer, and 3c is an acrylic resin layer.

Claims (1)

(57) [Scope of request for utility model registration] 1. A pipe having a thickness of 1 to 100 μm on an outer peripheral surface of two reciprocating crosslinked polyethylene pipes vertically attached to each other.
Polyethylene terephthalate film layer and the Thickness of 10
Aluminum deposited layer of 0-10000 ° and thickness of 0.1
Tape consisting of a three layer laminate of acrylic resin layer of ~100μ are sequentially laminated and adhered, the polyethylene terephthalate
A double reciprocating plastic pipe characterized in that the rate film layer is spirally wound with no gap on the pipe side.