JP7021421B2 - Tube lining material and its manufacturing method - Google Patents

Description

The present invention relates to a pipe lining material used for repairing an old existing pipe and a method for manufacturing the same.

Conventionally, pipe lining materials have been used to repair pipes such as aging sewer pipes and electric power pipes.
This pipe lining material is produced by forming a strip-shaped non-woven base material into a tubular shape. The pipe lining material is inserted into an existing pipe line that needs to be repaired, and the pipe lining material is already installed by fluid pressure. By pressing against the inner wall of the pipeline and curing the thermosetting resin impregnated in the non-woven fabric, a rehabilitation layer made of a pipe-shaped cured resin is formed on the inner surface of the existing pipeline to repair the pipeline. It is a thing.

By the way, when the strip-shaped nonwoven fabric base material is formed into a tubular shape, a method of joining the strip-shaped nonwoven fabric base material by suturing both ends in the width direction is generally adopted (see, for example, Patent Document 1). ) However, there is a problem that the sutured portion is opened due to the tension applied when the pipe lining material is pressed against the inner wall of the existing pipeline, and the strength of the rehabilitated layer in the portion is lowered.

Japanese Unexamined Patent Publication No. 10-246388

In the present invention, in view of the problems of the conventional pipe lining material that sews both ends of the strip-shaped nonwoven fabric base material in the width direction, the joint portion is formed by the tension applied when the pipe lining material is pressed against the inner wall of the existing pipe line. It is an object of the present invention to provide a tube lining material capable of forming a high-strength rehabilitation layer without opening and a method for producing the same.

In order to achieve the above object, in the tube lining material of the present invention, a synthetic resin film is fused to the outer peripheral surface of a tubular body formed by connecting both ends in the width direction of a strip-shaped nonwoven fabric base material by laminating. In the tube lining material, the tubular body is formed by overlapping the overlapping portions of the tubular body formed by overlapping both ends in the width direction of the strip-shaped nonwoven fabric base material by needle punching, and the tubular body is overlapped. It is characterized in that the end portion of the synthetic resin film covering the mating portion is fused to the surface of the synthetic resin film which is fused by covering the outer peripheral surface of the tubular body by laminating.

In this case, the synthetic resin film can be fused to the entire outer peripheral surface of the tubular body including the overlapped portion of the tubular body by laminating.

In addition, the overlapped portion of the tubular body is covered by the extension portion of the synthetic resin film fused to cover the outer peripheral surface of the tubular body, and the synthetic resin film covering the overlapped portion of the tubular body. The ends can be fused to the surface of the synthetic resin film that is fused over the outer peripheral surface of the tubular body by laminating.

Further, the overlapped portion of the tubular body was covered with the synthetic resin film fused to cover the outer peripheral surface of the tubular body and the laminated portion of the tubular body, and the overlapped portion of the tubular body was covered. Both ends of the synthetic resin film can be fused to the surface of the synthetic resin film which is fused so as to cover the outer peripheral surface of the tubular body by laminating.

Further, in the method for producing a tube lining material of the present invention, a tube formed by laminating a synthetic resin film on the outer peripheral surface of a tubular body formed by connecting both ends in the width direction of a strip-shaped nonwoven fabric base material. In the method for manufacturing a lining material, a tubular body is laminated on one surface by superimposing both ends in the longitudinal direction of a strip-shaped nonwoven fabric on which a synthetic resin film is laminated, except for both ends in the width direction. After joining the mating parts by needle punching, the end of the synthetic resin film covering the overlapping part of the tubular body is laminated on the surface of the fused synthetic resin film covering the outer peripheral surface of the tubular body. It is characterized by being fused by.

In this case, the synthetic resin film that covers the overlapped portion of the tubular body by the extension portion of the synthetic resin film that covers the outer peripheral surface of the tubular body and covers the laminated portion of the tubular body. The end portion may be fused to the surface of the synthetic resin film to be fused by covering the outer peripheral surface of the tubular body by laminating.

Further, the laminated portion of the tubular body is covered with a synthetic resin film that is fused to cover the outer peripheral surface of the tubular body and a separate synthetic resin film, and the synthetic resin that covers the laminated portion of the tubular body. Both ends of the film can be fused to the surface of the synthetic resin film to be fused by covering the outer peripheral surface of the tubular body by laminating.

According to the tube lining material of the present invention and the method for producing the same, the tubular body is formed by overlapping the overlapping portions of the tubular body formed by overlapping both ends in the width direction of the strip-shaped nonwoven fabric base material by needle punching. Therefore, the tension applied when the pipe lining material is pressed against the inner wall of the existing pipe does not open the joint where the overlapping parts of the tubular bodies are joined by needle punching, and a high-strength rehabilitation layer can be formed. can.
Further, the synthetic resin film is fused by laminating the end portion of the synthetic resin film that covers the overlapped portion of the tubular body to the surface of the synthetic resin film that is fused by covering the outer peripheral surface of the tubular body. Therefore, the fused state of the synthetic resin film covering the overlapped portion of the tubular body and the synthetic resin film covering the outer peripheral surface of the tubular body and being fused is ensured, and the non-woven fabric base is used. It is possible to obtain a high-quality tube lining material without leakage of the thermosetting resin impregnated in the material.

Further, a tube lining material having uniform strength can be obtained by laminating a synthetic resin film on the entire outer peripheral surface of the tubular body including the overlapped portion of the tubular body. can.

Further, the extension portion of the synthetic resin film which is fused by covering the outer peripheral surface of the tubular body may be used to cover the overlapped portion of the tubular body, or the outer peripheral surface of the tubular body may be covered and fused. By covering the overlapped portion of the tubular body with the synthetic resin film and the synthetic resin film which is separate from the synthetic resin film, it is possible to diversify the manufacturing method of the tube lining material.

It is explanatory drawing which shows one Example of the tube lining material of this invention and the manufacturing method thereof. It is an overall explanatory view which shows the manufacturing apparatus of the pipe lining material. It is explanatory drawing which shows the modification embodiment of the tube lining material of this invention and the manufacturing method thereof.

Hereinafter, embodiments of the tube lining material of the present invention and the method for manufacturing the same will be described with reference to the drawings.

FIG. 1 shows an embodiment of the tube lining material of the present invention and a method for manufacturing the same.
As shown in FIG. 1 (f), this tube lining material is formed by laminating a synthetic resin film 2 on the outer peripheral surface of a tubular body 10 formed by connecting both ends of a strip-shaped nonwoven fabric base material 1 in the width direction. In the fused tube lining material, the tubular body 10 is formed by joining the overlapping portions 13 of the tubular body 10 formed by overlapping both ends of the strip-shaped nonwoven fabric base material 1 in the width direction by needle punching. At the same time, the end portion of the extension portion 21 of the synthetic resin film 2 that covers the overlapped portion 13 of the tubular body 10 is laminated on the surface of the synthetic resin film 2 that covers the outer peripheral surface of the tubular body 10 and is fused. It is made to be fused by.

In this case, the nonwoven fabric base material 1 is made of synthetic fiber or inorganic fiber, which is conventionally used as a tube lining material, a blended fabric of these, a laminate, specifically, a synthetic fiber nonwoven fabric. A material obtained by joining the 11 and the glass mat 12 by needle punching can be preferably used.

Here, as the synthetic fiber non-woven fabric 11, a non-woven fabric made of various synthetic fibers such as polyester fiber, acrylic fiber, polyamide fiber, and polyolefin fiber can be used alone or in a blended manner. In this embodiment, polyester can be used. I try to use a non-woven fabric made of fibers.
Further, in this embodiment, the glass mat 12 uses a glass mat in which glass roving and glass chops are stitch-bonded, and is bonded and laminated with a non-woven fabric made of polyester fibers constituting the synthetic fiber non-woven fabric 11 by needle punching. I try to use.

The synthetic resin film 2 is basically a polyethylene film having a fusion function, and is a laminated body in which the polyethylene film is laminated on a core material layer, specifically, a laminated film in which polyethylene layers are formed on both sides of a polyamide resin (nylon) layer. I try to use.

Then, the synthetic resin film 2 is fused to the nonwoven fabric base material 1 by laminating, and as the embodiment, for example, the following can be adopted.
(A) Laminated in the order of synthetic resin film 2, synthetic fiber non-woven fabric 11, and glass mat 12 (this example).
(B) Laminating in the order of synthetic resin film 2, glass mat 12, and synthetic fiber non-woven fabric 11 (c) Laminating in the order of synthetic resin film 2, synthetic fiber non-woven fabric 11, glass mat 12, and synthetic fiber non-woven fabric 11.

Next, a method for manufacturing this tube lining material will be described.
First, as shown in FIGS. 1A and 1B, a non-woven fabric base 1 (thickness: 2 to 4 mm) in which a synthetic fiber nonwoven fabric 11 and a glass mat 12 are joined by needle punching is applied. A laminated product in which the synthetic resin film 2 is laminated is prepared on the glass mat 12 side of the material 1 except for both ends in the width direction.
The width dimension L1 of the strip-shaped nonwoven fabric base material 1 can be appropriately set according to the existing pipe diameter, construction conditions, etc. (the same applies to the other dimensions below), but is, for example, 295 to 690 mm (295 mm (existing)). The pipe diameter is 365 mm (for φ125), 420 mm (for φ150), 555 mm (for φ200), 690 mm (for φ250)), and the length can be up to about 300 m, for example.
The width dimensions L01 and L02 of the overlapped portion 13 of the tubular body 10 formed by overlapping both ends in the width direction of the strip-shaped nonwoven fabric base material 1 in which the strip-shaped nonwoven fabric base material 1 and the synthetic resin film 2 are not laminated. Is, for example, 30 to 40 mm, and the width dimension L12 of the fused portion 30 in which the strip-shaped nonwoven fabric base material 1 and the synthetic resin film 2 are laminated is, for example, L1- (60 to 80 mm).
Further, the width dimension L21 of the synthetic resin film 2 which is the extension portion 21 of the synthetic resin film 2 covering the overlapping portion 13 of the tubular body 10 is, for example, 60 to 80 mm.

As shown in FIGS. 1 (c) to 1 (d) and FIG. 2, the long strip-shaped non-woven fabric base material 1 on which the synthetic resin film 2 is laminated is sequentially sent out using the former 4 in the longitudinal direction. A tubular body 10 is formed by deforming both ends so as to overlap each other, and punching is performed in a state where the overlapped portion 13 of the tubular body 10 is exposed so as not to be covered with the extension portion 21 of the synthetic resin film 2. It is coupled by needle punching using the device 5.
The physical property values of the overlapped portion 13 of the tubular bodies 10 coupled in this way can be, for example, a tensile strength of 100 N / cm or more and a peel strength (tensile strength in the 90 ° direction) of 10 N / cm or more.
In this embodiment, the overlapping portion 13 of the tubular body 10 is overlapped without tapering the ends, but when the thickness of the nonwoven fabric base material 1 is thick, it exceeds, for example, 3 mm. In this case, the end portion may be tapered so that the overall thickness of the overlapping portion 13 of the tubular body 10 does not increase.

After that, as shown in FIGS. 1 (e) and 2, the laminated portion 13 of the tubular body 10 is covered with the extension portion 21 of the synthetic resin film 2, and the laminated resin 6 is used to cover the laminated portion 13 of the tubular body 10. The end portion of the extension portion 21 of the above is laminated on the surface of the synthetic resin film 2 which is fused by covering the outer peripheral surface of the tubular body 10 so as to be fused (fused portion 31). At this time, if necessary, the extension portion 21 of the synthetic resin film 2 and the superposition portion 13 of the tubular body 10 can also be fused (fused portion 32).

By the way, in this embodiment, as the synthetic resin film covering the overlapped portion 13 of the tubular body 10, the one integrated with the synthetic resin film 2 is used as the extension portion 21 of the synthetic resin film 2. , As in the modified example shown in FIG. 3, a synthetic resin film 20 separated from the synthetic resin film 2 is used, and the superposed portion 13 of the exposed tubular body 10 is needled by using the punching device 5. After joining by punching, the laminated portion 13 of the tubular body 10 is covered with the synthetic resin film 20, and the end portions of the synthetic resin film 20 are located on both sides of the laminated portion 13. It can also be fused to the surface of the synthetic resin film 2 which covers the outer peripheral surface of 10 and is fused by laminating. At this time, if necessary, the superposed portion 13 of the synthetic resin film 20 and the tubular body 10 can also be fused.
This makes it possible to diversify the manufacturing method of the pipe lining material.

The pipe lining material thus formed is inserted into an existing pipe line that needs to be repaired while being inverted in a state where the non-woven base material 1 is impregnated with a thermosetting resin such as an unsaturated polyester resin or an epoxy resin. Then, the pipe lining material is pressed against the inner wall of the existing pipe by fluid pressure, and the thermosetting resin impregnated in the non-woven substrate 1 is cured, so that the inner surface of the existing pipe is rehabilitated from a pipe-shaped resin cured product. A layer is formed to repair the pipeline.

As described above, according to the tube lining material and the manufacturing method thereof, the tubular body 10 needle punches the overlapped portion 13 of the tubular body 10 formed by overlapping both ends of the strip-shaped nonwoven fabric base material 1 in the width direction. Since the pipe lining material is bonded by processing, the joint portion to which the overlapped portion 13 of the tubular body 10 is bonded by needle punching does not open due to the tension applied when the pipe lining material is pressed against the inner wall of the existing pipeline, and the strength is high. A high rehabilitation layer can be formed.
Further, when the synthetic resin film 2 is an end portion of an extension portion 21 of the synthetic resin film 2 that covers the overlapping portion 13 of the tubular body 10 (in the case of the synthetic resin film 20 separated from the synthetic resin film 2). Is fused to the surface of the synthetic resin film 2 which is fused by covering the outer peripheral surface of the tubular body 10 with both ends of the synthetic resin film 20. The synthetic resin film 2 that covers the overlapped portion 13 and the synthetic resin film 2 that covers the outer peripheral surface of the tubular body 10 and is fused are ensured, and the non-woven substrate 1 is impregnated. It is possible to obtain a high-quality tube lining material without leakage of the heat-curable resin.

Further, the synthetic resin film 2 is fused to the entire outer peripheral surface of the tubular body 10 including the superposed portion 13 of the tubular body 10 by laminating to obtain a tube lining material having uniform strength. can do.

Although the tube lining material of the present invention and the method for producing the same have been described above based on the examples thereof, the present invention is not limited to the configuration described in the above examples and is appropriately used as long as the purpose is not deviated. The configuration can be changed.

The pipe lining material of the present invention and the method for manufacturing the pipe lining material are deteriorated because the joint portion does not open due to the tension applied when the pipe lining material is pressed against the inner wall of the existing pipe line, and a high-strength rehabilitation layer can be formed. It can be widely used as a pipe lining material used for repairing pipelines such as sewage pipes and power pipes.

1 Non-woven fabric base material (strip-shaped non-woven fabric base material)
10 Tubular body (nonwoven fabric base material)
11 Synthetic fiber non-woven fabric 12 Glass mat 13 Laminating part 2 Synthetic resin film 20 Synthetic resin film 21 Extension part 30 Fusion part 31 Fusion part 32 Fusion part 4 Former 5 Punching device 6 Laminate roll

Claims (4)

The overlapping portions of the tubular body formed by overlapping both ends in the width direction of the strip-shaped non-woven fabric base material are joined to form a tube lining material in which a synthetic resin film is fused by laminating on the outer peripheral surface thereof . The nonwoven fabric base material used for this purpose, in which a synthetic resin film is fused to one surface by laminating, is a nonwoven fabric base material in which a synthetic resin film is fused to one surface by laminating. A portion where the synthetic resin film is not provided is formed on the one end side in the width direction of the strip -shaped nonwoven fabric base material by the size of the overlapped portion, and the synthetic resin film is formed on the strip-shaped nonwoven fabric base material. An extension portion that extends so as to protrude from the other end in the width direction is provided, and the synthetic resin film is provided on the other end side in the width direction of the strip-shaped nonwoven fabric base material by the size of the overlapped portion. A non-woven fabric base material in which a synthetic resin film is fused by laminating on one surface, which is characterized by providing a non-fused portion . The synthetic resin film is fused to one surface according to claim 1, wherein the strip-shaped nonwoven fabric base material is formed by joining a synthetic fiber nonwoven fabric and a glass mat by needle punching. Non-woven fabric base material made of . A tube lining material formed by using a non-woven fabric base material obtained by laminating a synthetic resin film on one surface according to claim 1 or 2, in the width direction of the strip-shaped non-woven fabric base material. The overlapped portion of the tubular body formed by overlapping both ends of the film was joined by needle punching, and the overlapped portion was covered by the extension portion of the synthetic resin film and also covered the overlapped portion. A tube lining material characterized in that the widthwise end portion of the synthetic resin film is fused to the surface of the synthetic resin film which is fused so as to cover the outer peripheral surface of the tubular body by laminating. A method for manufacturing a tube lining material, which is formed by using a non-woven fabric base material obtained by laminating a synthetic resin film on one surface according to claim 1 or 2 , wherein the strip-shaped non-woven fabric base material is used. After joining the overlapped portion of the tubular body formed by overlapping both ends in the width direction by needle punching , the overlapped portion is covered with the extension portion of the synthetic resin film, and the overlapped portion is covered. The tube lining is characterized in that the widthwise end portion of the synthetic resin film is laminated to the surface of the synthetic resin film which is fused by covering the outer peripheral surface of the tubular body. Material manufacturing method.

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