JP6677505B2 - Tubular lining material, method for producing the same, and method for repairing existing pipe using tubular lining material - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a tubular lining material for covering the inner surface of a pipe when a pipe such as a sewer pipe is deteriorated, and a method for repairing an existing pipe using the tubular lining material.

  Existing pipes such as sewage pipes are deteriorated by long-term use, and their service life is generally about 50 years. Therefore, sewage pipes exceeding the service life are increasing year by year. In particular, aging sewer pipes are deformed or cracked, which not only reduces the drainage function of sewage, but also creates cavities in the ground due to the inflow of groundwater and sediment around the sewer pipes. It also causes the ground to sink. Also, sewage pipes buried underground may be susceptible to ground changes such as earthquakes, and at present, some repairs are required at predetermined times.

  As a method of repairing an existing pipe, a method of coating an inner surface of an existing pipe with a lining material is known (Patent Document 1). In this method, a tubular lining material formed from a fiber mat impregnated with a curable resin composition is introduced into an existing pipe in an uncured state, and then the closed space formed by closing both ends of the lining material is formed. By introducing compressed air, the lining material is cured by light or heat while the lining material is pressed against the inner surface of the existing pipe. As a result, the existing pipe is repaired by forming the resin rehabilitation pipe inside the existing pipe.

  The lining material is generally manufactured by impregnating a curable resin composition into a band-like fiber mat formed of fibers such as glass fibers, spirally winding the resultant into a tubular shape (Patent Document 2). The manufactured lining material has an outer diameter slightly smaller than an inner diameter of a pipe to be repaired. Thereby, by introducing the above-mentioned compressed air, it is possible to form a rehabilitation pipe which is in close contact with the inner surface of the existing pipe by expanding the diameter of the lining material.

JP-A-09-123279 Japanese Patent Publication No. 09-509107

  However, conventional lining materials have a limit in increasing the diameter, and when repairing an existing pipe that has deteriorated and has irregularities or deformation, it is necessary to obtain a rehabilitated pipe that sufficiently responds to the irregularities or deformation. It is difficult to obtain a rehabilitating pipe of good quality due to wrinkles and the like.

  Therefore, an object of the present invention is to form a high-quality rehabilitated pipe that fits the shape and hardly causes wrinkles even when repairing an existing pipe that has been deteriorated and has irregularities or deformation. It is an object of the present invention to provide a tubular lining material and a method for manufacturing the same. Another object of the present invention is to provide a method for repairing an existing pipe using the tubular lining material.

In order to solve the above problems, the tubular lining material according to claim 1 is
A tubular lining material formed from a fiber mat impregnated with a curable resin composition,
The fiber mat is characterized in that 50% by mass or more based on the mass of the fiber mat excluding the curable resin composition is composed of fibers having a length of 2 to 20 cm.

  The conventional tubular lining material has been constituted by long fibers in which the fiber constituting the fiber mat has a length equal to or greater than the circumference of the lining material to be formed (usually 50 cm or more). In the present invention, when the length of the fibers constituting at least half of the fiber mat, that is, at least 50% by mass is as short as 2 to 20 cm, the fibers are separated in a direction in which the fibers are separated from each other when the lining material is expanded. It is easy to move, and the degree of diameter expansion can be increased accordingly.

  Therefore, the diameter of the lining material before the diameter expansion can be reduced by the degree to which the diameter expansion can be increased, and the workability of the existing pipe repair work is improved. When repairing an existing pipe that has been uneven or deformed due to aging, it can be made to have a degree of diameter expansion according to the location, so that it has good quality without wrinkles etc. that follow unevenness and deformation. It becomes possible to form a rehabilitation tube.

  The tubular lining material according to claim 2 is characterized in that the extending direction of the fiber having a length of 2 to 20 cm is 65 to 90 ° with respect to the axial direction of the tubular lining material.

  As described above, generally, the tubular lining material is formed to be slightly smaller than the inner diameter of the existing pipe, and is expanded during the operation. Conventionally, since long fibers were used, the angle at which the fibers extended had to be reduced with respect to the axial direction of the tubular lining material so that the tubular lining material could be expanded in diameter. . If the angle is large, the diameter cannot be further increased. However, there is a problem that as the angle is smaller, the formed rehabilitation pipe has a smaller resistance to a vertical force.

  In the present invention, since short fibers having a length of 2 to 20 cm are used, even when the angle is as large as 65 to 90 °, when the diameter is expanded, the short fibers are sufficiently expanded by separating from each other. It has become possible. And since the fibers are arranged at such a large angle, the formed rehabilitation pipe can exhibit sufficient resistance against vertical force, and ensure a high level of strength as a ring. Becomes possible.

  The tubular lining material according to claim 3 is characterized in that a belt-like reinforcing material is further provided on an outer peripheral surface of the tubular lining material in parallel to an axial direction of the tubular lining material.

  According to this configuration, even when an axial force is applied to the tubular lining material, the presence of the belt-like reinforcing material exerts a resistance to the force, so that it can be used during construction, transportation, storage, and the like. In this case, the shape of the tubular lining material as a tubular object can be sufficiently maintained. Further, for example, in a tubular lining material formed by spirally winding a fiber mat impregnated with a curable resin composition, the lining material is easily deformed when a force is applied in the axial direction of the lining material. The arrangement of the reinforcing material is particularly effective for such a lining material. Then, even after the construction, when an axial force is applied to the rehabilitation pipe due to a crustal deformation such as an earthquake, it is possible to exhibit excellent resistance to this.

  The tubular lining material according to claim 4 is characterized in that the fibers are at least one selected from the group consisting of glass fibers, carbon fibers, and aramid fibers. Since these fibers have high strength, it is possible to provide a lining material capable of sufficiently increasing the strength of the formed rehabilitating pipe.

Further, the method for producing a tubular lining material according to claim 5, which achieves the above object, comprises:
An impregnation step of impregnating the curable resin composition into the belt-like fiber mat, and
A winding step of spirally winding the band-shaped fiber mat impregnated with the curable resin composition to form a tube-lined material, wherein the band-shaped fiber mat is: It is characterized in that 50% by mass or more based on the mass of the fiber mat excluding the curable resin composition is composed of fibers having a length of 2 to 20 cm.

  It is preferable in terms of workability to produce a tubular lining material by winding the same using a belt-shaped fiber mat, and the produced tubular lining material is made of a fiber having a length of 2 to 20 cm. As described above, the use of this tubular lining material makes it possible to form a high-quality rehabilitated pipe free of wrinkles or the like following irregularities and deformations, as described above.

  The method according to claim 6, wherein in the winding step, in the tubular lining material produced, the extending direction of the fiber having a length of 2 to 20 cm is 65 to 65 with respect to the axial direction of the tubular lining material. It is characterized in that the band-shaped fiber mat is wound so as to be 90 °.

  According to this configuration, similarly to the second aspect, the formed rehabilitation pipe has excellent resistance to the vertical force, and a high-strength rehabilitation pipe can be formed. Becomes

  The method according to claim 7, wherein the band-shaped fiber mat includes fibers having the length of 2 to 20 cm extending in a length direction of the band-shaped fiber mat.

  By using a band-like fiber mat in which fibers of 2 to 20 cm extend in the length direction thereof, in the winding step, the fibers of 2 to 20 cm in the manufactured tubular lining material have a predetermined angle. The angle can be easily adjusted so that

  The method according to claim 8, wherein, after the winding step, a belt-like reinforcing material is further disposed on an outer peripheral surface of the tubular lining material in a direction parallel to an axial direction of the tubular lining material. It is characterized by including. Similarly to the third aspect, by disposing the belt-shaped reinforcing material, it is possible to sufficiently maintain the shape of the tubular lining material as a tubular material.

  The method according to claim 9, wherein the fiber is at least one selected from the group consisting of glass fiber, carbon fiber and aramid fiber. Similar to the fourth aspect, by using these high-strength fibers, it is possible to obtain a high-strength rehabilitation pipe.

  Further, the present invention provides an introduction step of introducing the tubular lining material according to any one of claims 1 to 4 into an existing pipe, and expanding the introduced tubular lining material to reduce the diameter of the introduced tubular lining material. A method for repairing an existing pipe, comprising: a step of pressing the inner surface of the existing pipe so as to be in close contact therewith; and a curing step of curing the expanded tubular lining material. By using the tubular lining material of the present invention, it is possible to form a rehabilitated pipe that has no wrinkles or the like and that follows the unevenness or deformation shape of the existing pipe.

  ADVANTAGE OF THE INVENTION According to this invention, in the diameter expansion work of a tubular lining material, since the diameter expansion degree can be made larger than before, the diameter of the lining material before diameter expansion can be made small, and workability is improved. Not only can it be used, but when repairing an existing pipe with irregularities or deformation, the degree of diameter expansion can be adjusted according to the location, so good quality without wrinkles etc. that follow irregularities or deformation It is possible to form a rehabilitating pipe.

It is a perspective view showing an example of a tubular lining material of the present invention. It is explanatory drawing of a fiber mat. It is a schematic diagram showing a process of repairing an existing pipe using a tubular lining material. It is the schematic which shows the manufacturing process of a tubular lining material.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an example of the tubular lining material of the present invention. The tubular lining material 10 of the present embodiment is provided with an inner film 12, a fiber mat 14 impregnated with a curable resin composition, belt-like reinforcing materials 16-1, 16-2, and an outer film 18 in this order from the inside. I have. The inner film 12, the belt-shaped reinforcing members 16-1, 16-2, and the outer film 18 are provided as needed.

  The fiber mat 14 impregnated with the curable resin composition constitutes the main component of the tubular lining material 10, and this fiber mat is 50% by mass or more based on the mass of the fiber mat excluding the curable resin composition. , Preferably 65% by weight or more, particularly preferably 75% by weight or more, more preferably 90% by weight or more, composed of fibers having a length of 2 to 20 cm, preferably 5 to 15 cm, particularly preferably 5 to 10 cm. I have. The thickness of the fiber is not particularly limited, but is, for example, 10 to 40 μm. Since the short fiber of 2 to 20 cm is contained at this content, the degree of the diameter expansion can be increased in the diameter expansion step in the repair work of the existing pipe, which will be described later in detail.

  FIG. 2 is a side view (a) of only the fiber mat 14 and a schematic partial enlarged view (b) thereof. In the fiber mat 14, the extending direction (the direction A in the drawing) of the fibers 14 a having a length of 2 to 20 cm corresponds to the axial direction (the direction B in the drawing) of the tubular lining material 10 (that is, the tubular fiber mat 14). As a reference, it is preferable to be 65 to 90 °. By extending the fiber at such a large angle, it is possible to exhibit excellent resistance to the vertical force applied to the formed rehabilitation pipe, and to maintain the strength as a ring at a high level. it can.

  Such a fiber mat 14 can be produced, for example, by the following method. That is, several tens of strands obtained by twisting and combining a plurality of fibers having a length of 2 to 20 cm are bundled, and a plurality of string-shaped rovings are further formed in the same direction to form a band-shaped roving. . In this case, it is preferable that the rovings are randomly arranged so that the rovings are not at the same position but at different positions with respect to a direction perpendicular to the extending direction. This makes it possible to provide a structure in which the strip shape is less likely to collapse and the fibers are more easily separated from each other in the circumferential direction by the diameter expansion operation described later. Then, after that, another roving is arranged in a direction different from the extending direction of the fiber having a length of 2 to 20 cm in order to maintain the combined band shape, and for example, a mist-like adhesive By spraying, the fiber mat 18 can be formed. The belt-shaped fiber mat can be formed into a tubular fiber mat by, for example, spirally winding. In this case, the impregnation of the curable resin composition into the fiber mat may be performed before or after winding, but before the winding is preferable because the workability is excellent.

  The fibers constituting the fiber mat 14 are preferably at least one selected from the group consisting of, for example, glass fibers, carbon fibers, and aramid fibers. Since these fibers have high strength, it is possible to provide a lining material capable of sufficiently increasing the strength of the formed rehabilitating pipe. The above fibers can be used in combination of two or more.

  The inner film 12 and the outer film 18 shown in FIG. 1 may be those conventionally used for manufacturing a tubular lining material. For example, a polyethylene film, a polypropylene film, a polyethylene terephthalate film, or the like can be used. When the curable resin composition is a photocurable resin composition, an inner film having transparency to irradiated light is used.

The curable resin composition impregnated in the fiber mat 14 may be a resin composition curable by light or a resin composition curable by heat. In any curable resin composition, those obtained by dissolving a polymerizable resin such as a vinyl ester resin or an unsaturated polyester resin in a solvent such as styrene can be used, and in the case of a photocurable resin composition, an azo compound or the like can be used. In the case of a thermosetting resin composition, an organic peroxide which reacts with heat is compounded. The weight ratio of the fiber mat 14 to the curable resin composition is, for example, 50 to 55% by mass of the fiber mat and 45 to 50% by mass of the curable resin composition. The weight of the fiber mat 14 is, for example, 500 to 800 g / m ² , and preferably 600 to 700 g / m ² .

  The band-shaped reinforcing members 16-1 and 16-2 may be any as long as they can exhibit resistance in the axial direction of the fiber mat 14. A preferred material is a fiber mat, preferably a fiber mat impregnated with a curable resin composition. In the illustrated example, the belt-shaped reinforcing members 16-1 and 16-2 are provided at two locations on the outer periphery of the fiber mat 14 in opposite directions, but may be provided at one location or at three or more locations. The belt-shaped reinforcing members 16-1 and 16-2 are provided in parallel with the axial direction of the tubular lining material 10.

  Even if an axial force is applied to the tubular lining material 10 by arranging the belt-shaped reinforcing members, the presence of the band-shaped reinforcing members 16-1 and 16-2 exerts a resistance to the force. At the time of construction, transportation, storage, and the like, the shape of the tubular lining material as a tubular object can be sufficiently maintained. Further, for example, a tubular lining material formed by spirally winding a fiber mat impregnated with a curable resin composition is easily deformed when a force in the axial direction of the lining material is applied, so that a belt-like reinforcing material is used. The arrangement of 16-1 and 16-2 is particularly effective for such a lining material. Then, even after the construction, when an axial force is applied to the rehabilitation pipe due to a crustal deformation such as an earthquake, it is possible to exhibit excellent resistance to this.

  Next, a method for repairing an existing pipe using the lining material of the present invention will be described. The method for repairing an existing pipe of the present invention may use the lining material of the present invention, and the work itself may be performed in the same manner as in the related art. FIG. 3 is an explanatory view of the existing pipe repair method of the present invention.

The existing pipe repair method of the present invention includes an introduction step of introducing the tubular lining material 10 of the present invention into the existing pipe 100,
A diameter-expanding step of expanding the diameter of the introduced tubular lining material 10 to press the tubular lining material 10 against the inner surface of the existing pipe 100 so as to closely adhere thereto;
A curing step of curing the expanded tubular lining material 10,
including.

  In this drawing, a sewer pipe (sewage main pipe) is shown as an example of an existing pipe. After being introduced into the existing pipe 100, the tubular lining material 10 is closed at both ends with closing members 62-1 and 62-2, and compressed air is introduced into the closed space 70 formed thereby to form the tubular lining material 10. The diameter expansion step is performed by expanding the diameter of 50.

  Thereafter, by irradiating the lining material with light from the inside of the lining material, the curable resin composition of the lining material is cured to form a resin rehabilitation pipe inside the existing pipe. In this manner, the existing pipe repair method of the present invention is performed. The inner film of the lining material is peeled off as necessary. The illustrated example is an example in which a tubular lining material using a photocurable resin composition is used, but in the case of a tubular lining material using a thermosetting resin composition, steam or the like is used instead of light irradiation. Perform heating.

  In the drawing, reference numeral 90 denotes a damming member for damping the flow of sewage. Reference numerals 66 and 72 denote working devices. Air is supplied from the working device 66 through the hose 68 to the inside of the tubular lining material 10 and discharged from the hose 74, so that the air flow in the closed space 70 is reduced. Flammable substances are being discharged. Reference numeral 60 denotes a lamp connector for irradiating the lining material 50 with light. After the curing step is completed, a rehabilitation pipe is formed inside the existing pipe 100 by performing an edge treatment as necessary.

  The use of the tubular lining material 10 of the present invention has the following effects. That is, the conventional tubular lining material 10 is formed of a long fiber in which the fiber constituting the fiber mat is at least as long as the circumference of the lining material to be formed (usually 50 cm or more). In the present invention, the lining material is expanded by the fact that at least 50% by mass of the fiber mat is made of short fibers having a length of 2 to 20 cm based on the mass of the fiber mat excluding the curable resin composition. At this time, the fibers easily move in a direction in which the fibers are separated from each other, and the degree of diameter expansion can be increased accordingly.

  Therefore, the degree of expansion can be increased, so that the diameter of the lining material before the expansion can be reduced, thereby improving the workability and repairing the old pipe that has deteriorated and has irregularities and deformation. In this case, since the diameter can be increased according to the location, it is possible to form a high-quality rehabilitating pipe free from wrinkles or the like that follows the shape of unevenness or deformation.

  In general, the tubular lining material is formed to be slightly smaller than the inner diameter of the existing pipe, and is expanded at the time of work. Conventionally, since long fibers were used, the angle at which the fibers extended had to be reduced with respect to the axial direction of the tubular lining material so that the tubular lining material could be expanded in diameter. . If the angle is large, the diameter cannot be further increased. However, there is a problem that as the angle is smaller, the formed rehabilitation pipe has a smaller resistance to a vertical force.

  In the present invention, since short fibers having a length of 2 to 20 cm are used, even when the angle is as large as 65 to 90 °, when the diameter is expanded, the short fibers are sufficiently expanded by separating from each other. It has become possible. And since the fibers are arranged at such a large angle, the formed rehabilitation pipe can exhibit sufficient resistance against vertical force, and ensure a high level of strength as a ring. Becomes possible.

  Next, a method for producing the tubular lining material of the present invention will be described. FIG. 4 is a schematic view showing an example of a process for manufacturing a lining material. The mandrel 40 is used for manufacturing the lining material, and the band-shaped fiber mat 20 is wound thereon. The tubular inner film 12 is mounted on the mandrel 40 in advance. The inner film 12 is used as needed, and has a role of protecting the inner surface of the manufactured lining material.

  In the present embodiment, the tubular material 22 is formed by spirally winding the fiber mat 20 impregnated with the curable resin composition in advance on the outer periphery of the inner film 12.

  The fiber mat 20 is stored in a roll shape in advance, and is unwound from the rolls 20-1 and 20-2 at the time of this winding step. In the present embodiment, two fiber mat rolls 20-1 and 20-2 are arranged around the mandrel 40, and the fiber mat 20 is fed out from each of the rolls 20-1 and 20-2 to form the inner mat. Wound on the outer periphery of the film 12. Then, the fiber mat 20 from the roll 20-1 and the fiber mat 20 from the roll 20-2 are alternately wound and sequentially stacked. The illustrated example shows an example in which two rolls 20-1 and 20-2 are arranged at positions facing each other with reference to the mandrel 40. However, the number of rolls of the fiber mat may be one, and the number is not limited to two and may be three. You may arrange more than this. That is, the number of rolls may be one or more.

  The fiber mat 20 is wound with its angle being adjusted so that the extending direction of the above-described fiber having a length of 2 to 20 cm is 65 to 90 ° with respect to the axial direction of the formed tubular lining material.

  The fiber mat 20 preferably has fibers of 2 to 20 cm in length extending in the length direction of the fiber mat 20. Thereby, the adjustment to the desired angle can be easily performed. In this case, it is preferable that the spiral angle at the time of spirally winding the belt-like fiber mat 20 be 65 to 85 °. The helical angle is indicated by an angle A in FIG. 4, and the inclination of the fiber mat 20 with respect to the axial direction of the tubular object 22 (that is, the axial direction of the formed tubular lining material). It is an angle indicating whether it is turned. Thereby, in the tubular lining material, the operation of making the fiber having a length of 2 to 20 cm within the range of 65 to 90 ° with respect to the axial direction of the tubular lining material becomes easy.

  Next, the belt-shaped reinforcing members 16-1 and 16-2 are arranged on the outer periphery of the tubular member 22 formed by winding the fiber mat 20 so as to extend in the axial direction. In the illustrated example, the two band-shaped reinforcing members 16-1 and 16-2 are arranged in directions facing each other with respect to the mandrel 40. By arranging the band-shaped reinforcing material, a resistance force is exerted on the force applied in the axial direction of the spirally wound tubular article 22, and the shape of the lining material can be prevented from being collapsed. In addition, the arrangement | positioning process of this belt-shaped reinforcement material is performed as needed. Further, in the illustrated example, two band-shaped reinforcing members 16-1 and 16-2 are arranged, but the number of band-shaped reinforcing members may be one, or three or more. The width of the belt-shaped reinforcing member is, for example, 10 to 50% with respect to the circumference of the tubular object 22.

  Thereafter, outer films 18-1 and 18-2 are further provided on the outer periphery of the tubular material. In the illustrated example, two strip-shaped outer films 18-1 and 18-2 are arranged so as to face each other. Then, the width direction ends of the two band-shaped outer films 18-1 and 18-2 are thermocompression-bonded by the thermocompression bonding device 30 and are fused to each other. As a result, the inner film 12, the tubular member 22, and the band-shaped reinforcing members 16-1 and 16-2 are included in the integrated outer films 18-1 and 18-2. The width of the outer films 16-1 and 16-2 may be such that the total length thereof is longer than the circumferential length of the tubular object 22.

  Thus, a tubular lining material is manufactured. The manufactured lining material is crushed and folded for storage and transportation.

  In addition, the extending direction of the fibers having a length of 2 to 20 cm in the band-shaped fiber mat 20 may not be the length direction of the band-shaped fiber mat 20, and in that case, the length is 2 to 20 cm in the manufactured lining material. The helical angle may be adjusted so that the direction in which the fibers extend is 65 to 90 ° with respect to the axial direction of the tubular lining material to be manufactured.

  The present invention is not limited to the configuration of each of the above embodiments, and various modifications can be made within the scope of the present invention. Hereinafter, the present invention will be described with reference to examples.

(1) Preparation of tubular lining material 1 (the present invention) A belt-like glass fiber mat (width 840 mm, after curing) previously impregnated with a photocurable resin composition (including an unsaturated polyester resin, styrene and a photopolymerization initiator). The thickness 0.7 mm, the weight of the glass fiber mat 650 g / m ² , and the amount of the impregnated resin composition 600 g / m ² ) are shown in Table 1 below with a cylindrical inner film (polyethylene film) 12 as shown in FIG. After winding at a helical angle, a tubular lining material (thickness: 2.8 mm) is obtained by arranging the belt-like reinforcing materials 16-1, 16-2 and the outer films (polyethylene films) 18-1, 18-2. Was. The used lining material is formed by using a glass fiber (thickness: 20 μm) having a length in a range of 2 to 20 cm so as to form a band-like fiber mat. In this fiber mat, glass fibers having a length of 2 to 20 cm extend in the length direction of the band-like mat.

(2) Preparation of tubular lining material 2 (comparative example) Lining was performed in the same manner as in (1) above, except that glass fibers having a length of 30 cm were used instead of glass fibers having a length of 2 to 20 cm. Lumber was manufactured.

(3) Evaluation Regarding the above two lining materials 1 and 2, the lining material was expanded by introducing a lining material inside the pipe having irregularities and deformation, sealing both ends and introducing compressed air into the inside. Was. Thereafter, the lining material was cured by irradiating the lining material with ultraviolet rays using an ultraviolet lamp, thereby obtaining a rehabilitated tube. When the rehabilitation pipe was examined for wrinkles, the rehabilitation pipe of the lining material 1 had no wrinkles and was of good quality. On the other hand, it was recognized that the retread tube of the lining material 2 had wrinkles.

(4) Measurement of strength After sealing both ends of the produced lining material, the lining material is expanded by supplying compressed air into the inside, and in this state, an ultraviolet lamp introduced in advance inside the lining material is used. By irradiating ultraviolet rays from the inside of the lining material, the lining material was cured to form a sample of the rehabilitation pipe. The following evaluation was performed on this sample.

(1) Short-term flexural modulus and long-term flexural modulus The flexural modulus was measured according to JISK 7035. The short-term bending elastic modulus is an elastic modulus measured immediately after a predetermined load is applied to a sample of the rehabilitating pipe. The long-term bending elastic modulus is an elastic modulus measured after a predetermined load is applied to the sample of the rehabilitation pipe and 10,000 hours have elapsed.

(2) Short-term bending strength The bending strength was measured according to JISK 7035. The short-term bending strength is a bending strength measured immediately after a predetermined load is applied to a sample of the rehabilitated pipe.

DESCRIPTION OF SYMBOLS 10 Tubular lining material 12 Inner film 14 Fiber mat 14a Fiber 16-1, 16-2 Strip-shaped reinforcing material 18, 18-1, 18-2 Outer film 20 Fiber mat 20-1, 20-2 Roll of fiber mat 22 Tubular material Reference Signs List 30 thermocompression bonding device 40 mandrel 60 light irradiation devices 62-1 and 62-2 closing member 100 existing pipes 102-1 and 102-2 manhole

Claims (6)

A tubular lining material formed by winding a fiber mat impregnated with a curable resin composition,
The fiber mat, based on the mass of the fiber mat excluding the curable resin composition, comprises 65 % by mass or more of fibers having a length of 2 to 20 cm ,
The extending direction of the fiber having the length of 2 to 20 cm is 65 to 90 ° based on the axial direction of the tubular lining material,
Said fibers, glass fibers, tubular lining material for carbon fibers or aramid fibers der wherein Rukoto. The tubular lining material according to claim 1 , wherein a belt-like reinforcing material is further provided on an outer peripheral surface of the tubular lining material in parallel with an axial direction of the tubular lining material. An impregnation step of impregnating the curable resin composition into the belt-like fiber mat, and
A winding step of spirally winding the band-like fiber mat impregnated with the curable resin composition to form a tubular lining material,
A method for producing a tubular lining material comprising:
The band-shaped fiber mat is made of fibers having a length of 2 to 20 cm, with 65 % by mass or more based on the mass of the fiber mat excluding the curable resin composition ,
In the winding step,
In the manufactured tubular lining material, the length of the fiber having a length of 2 to 20 cm is wound around the band-shaped fiber mat such that the extending direction of the fiber is 65 to 90 ° based on the axial direction of the tubular lining material,
The method according to claim 1, wherein the fibers are glass fibers, carbon fibers, or aramid fibers . The method according to claim 3 , wherein the band-shaped fiber mat includes fibers having the length of 2 to 20 cm extending in the length direction of the band-shaped fiber mat. After the winding step,
5. The method according to claim 3 , further comprising the step of arranging a belt-shaped reinforcing material on an outer peripheral surface of the tubular lining material in parallel with an axial direction of the tubular lining material. . An introduction step of introducing the tubular lining material according to claim 1 or 2 into an existing pipe.
By expanding the diameter of the introduced tubular lining material, a diameter expanding step of pressing the tubular lining material against the inner surface of the existing pipe and bringing the inner surface into close contact therewith, and
A curing step of curing the tubular lining material in the expanded state,
Existing pipe repair method including.

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