Resin pipe, connecting pipe, and method for manufacturing a resin pipe

Abstract

The goal is to create a resin tube that allows for identification of the main body without removing the protective layer, and that maintains this identification over a long period of time. [Solution] The resin pipe 1 has a tubular main body portion 11 extending in the axial direction A, and a protective layer 12 integrally formed on the outer circumferential surface of the main body portion 11 so as to cover the main body portion 11. The protective layer 12 has an identification portion 13 integrally formed with the protective layer 12 so as to extend in a strip shape in the axial direction A.

Claims

1. A tubular main body extending in the axial direction, A protective layer integrally formed on the outer surface of the main body so as to cover the main body, A resin tube having, The protective layer has an identification portion that is formed integrally with the protective layer so as to extend in a strip shape in the axial direction. Plastic pipe.

2. In the resin pipe according to claim 1, The identification unit is configured to be able to identify at least one of the physical properties, structure, or specifications of the main body. Plastic pipe.

3. In the resin pipe according to claim 2, The aforementioned physical properties include at least one of the material grade, mechanical strength, or thermal properties. The aforementioned structure includes at least one of the thickness, inner diameter, outer diameter, shape, SDR (Standard Dimension Ratio), or layer structure of the main body. The above specifications include at least one of the color of the main body, the application of the resin pipe, or the pressure resistance performance of the resin pipe. Plastic pipe.

4. In the resin pipe according to claim 1, The protective layer has an ultraviolet shielding function. Plastic pipe.

5. In the resin pipe according to claim 4, The color of the aforementioned protective layer is black. Plastic pipe.

6. In the resin pipe according to claim 4, The protective layer contains carbon black, Plastic pipe.

7. In the resin pipe according to claim 1, The identification part has a width corresponding to the thickness of the main body. Plastic pipe.

8. In the resin pipe according to claim 1, The identification section is composed of a number of lines corresponding to the thickness of the main body. Plastic pipe.

9. In the resin pipe according to claim 1, The main body has a multilayer structure with the radial direction as the stacking direction, The identification section represents the multilayer structure of the main body. Plastic pipe.

10. In the resin pipe according to any one of claims 1 to 9, The color of the identification part indicates the intended use of the resin pipe. Plastic pipe.

11. A tubular joint body having a pair of insertion ports into which resin pipes are each inserted, and extending in the axial direction, The heating element located on the inner circumference side of the joint body, It has, A resin connecting tube that joins the resin tubes inserted into the pair of sockets by thermal welding caused by the heating of the electric heating element, A protective layer formed on the outer circumferential surface of the joint body so as to cover the joint body, An identification portion is formed integrally with the protective layer so as to extend in a strip shape in the axial direction, Having, Connecting pipe.

12. A tubular main body extending in the axial direction, A protective layer integrally formed on the outer surface of the main body so as to cover the main body, A method for manufacturing a resin tube having the following characteristics: A body part forming step in which the first resin is extruded by an extrusion molding machine to form the tubular body part that extends in the axial direction, A protective layer forming step involves using a co-extrusion molding machine to extrude a second resin having an ultraviolet shielding function onto the outer surface of the main body so as to cover the main body, thereby forming the protective layer, and extruding a third resin integrally with the second resin forming the protective layer to form an identification portion that extends in a strip shape in the axial direction, A method for manufacturing a resin pipe having [a certain characteristic].

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