JP2012131218A - Lining material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lining material which has excellent follow-up properties for an inner or outer shape of a tubular body, is easy to be handled with good working properties, and can expect sufficient strength revelation as the lining material made of fiber reinforced composite materials with a thermoplastic resin as a matrix.SOLUTION: The lining material 1 is composed of a composite liner 11 of a plurality of layers. The composite liner 11 is a tubed body in which a sheet-shaped base 3 integrated by heating and pressurizing a plurality of reinforced fiber filaments 31 and a thermoplastic resin film 32, which are lined up unidirectionally, is formed in an almost tubular shape.

Description

  The present invention relates to a lining material made of a fiber-reinforced composite material.

  As a method of rehabilitation without excavating underground pipes such as sewer pipes, a method of inserting an uncured FRP cylindrical body into a pipe line or a tubular lining material made of thermoplastic resin in an existing pipe There is a method of lining the inner surface of the existing pipe by inserting it and attaching it to the inner surface of the existing pipe.

  For example, as described in Patent Document 1, a lining material that is smaller than the inner diameter of an existing tube and that recovers the shape of the tube at the shape memory temperature is inserted into the existing tube, and the lining material is heated to recover the shape. Then, there is a rehabilitation method in which pressure is applied to expand and expand the diameter, and the lining is brought into close contact with the inner peripheral surface of the existing pipe.

  Recently, as described in Patent Document 2 and Patent Document 3, a lining material made of a thermoplastic composite material reinforced with reinforcing fibers is inserted into a duct, and the lining material is heated and pressurized. A method of lining by contacting an existing pipe has also been proposed.

  Specifically, the lining material disclosed in Patent Document 2 and Patent Document 3 is a composite material of a thermoplastic filament made of a thermoplastic material and a reinforced fiber filament made of glass fiber before being heated. Is formed into a substantially cylindrical shape. And as a rehabilitation method of the existing pipe | tube using this lining material, after inserting the said lining material in a duct, the said lining material is heated with a heating means, and the said thermoplastic filament is fuse | melted. As a result, the reinforcing fiber filaments are dispersed in the molten plastic material. After that, by applying pressure to the inside of the lining material to expand the diameter and cooling and solidifying the plastic material, a strong composite lining layer reinforced with reinforcing fiber filaments is formed, and the existing pipe is renewed by this composite lining layer. Will be.

Japanese Patent Laid-Open No. 11-230212 Japanese Patent No. 4076188 Special table 2004-508989 gazette

  However, in the lining method using a lining material made of a thermoplastic composite material reinforced with fibers as disclosed in Patent Document 2 and Patent Document 3, there are problems as described below. There was still room for improvement in order to achieve practical use.

  First, it takes a relatively long time to melt the plastic material constituting the thermoplastic filament. For example, when underground water has entered the existing pipe from a damaged part such as a crack in an old pipe, the lining material is cooled by that water, and the plastic material can be melted quickly. Disappear. As a result, it takes a relatively long time to melt the entire thermoplastic filament, leading to a prolonged construction time.

  Further, as described above, when the plastic material cannot be rapidly melted in a part of the lining material, the thermoplastic filament may be undissolved due to uneven heating. When such unmelted residue is generated, a configuration in which the reinforcing fiber filaments are dispersed in the plastic material cannot be obtained in that portion, which leads to non-uniform strength of the lining material.

  In order to avoid the generation of the unmelted residue, it is conceivable to set the heating temperature high or set the heating time long. However, in this case, it is inevitable that the construction time is prolonged, and there is a possibility that the heating is partially excessive. In an overheated place, a part of the plastic material may flow and uneven thickness may occur in the lining material. Even if such uneven thickness occurs, the strength of the lining material may become uneven. become.

  Also, in composite materials of reinforcing fiber filaments and thermoplastic filaments, fibers are easily cut by friction between fiber bundles in the manufacturing process and shaping process of the lining material, reducing the strength and non-uniformity of the lining material. There is a risk of inviting or causing line troubles in the manufacturing process.

  The present invention has been made in view of the above points, and the object of the present invention is that the thermoplastic resin has a good impregnation property with respect to a lining material made of a fiber-reinforced composite material having a matrix as a matrix, An object of the present invention is to provide a lining material that has excellent mechanical properties and can stably express high strength, and has good handleability and workability, and can shorten the construction time.

  The solution means of the present invention for achieving the above object is based on a lining material for lining the inner surface or outer surface of a tubular body. A tube formed by forming a sheet-like base material in which a large number of reinforcing fiber filaments aligned in one direction and a thermoplastic resin film are integrated by heating and pressurizing the lining material into a substantially cylindrical shape. It is set as the structure which comprises a shape body.

  With this specific matter, a part of the process of forming a lining layer by impregnating a thermoplastic resin material between reinforcing fiber filaments can be performed in advance before the lining construction. This makes it possible to shorten the time required for heating and pressurizing work at the lining construction site, eliminating the need to set the heating temperature of the lining material excessively high, and providing sufficient strength stably. Is possible. As a result, a uniform lining layer can be formed quickly and economically on the tubular body. In addition, since the lining material is made of a fiber reinforced composite material using a thermoplastic resin as a matrix, it has high flexibility and excellent shape stability. Therefore, the lining material is easy to handle and the shape following property to the curved surface of the tubular body is extremely high. Therefore, the lining of the tubular body can be performed with good workability, and a lining layer sufficiently adhered to the inner surface or the outer surface of the tubular body can be formed.

  The following is mentioned as a more concrete structure of lining material. First, the cylindrical body is formed of a tape material obtained by cutting the sheet-like base material into a certain width along the fiber orientation direction or a braided material using a converging body of the tape material as a braid.

  In this case, the cylindrical body is formed by crossing together the braids having strength including reinforcing fiber filaments and assembling the braids in a substantially cylindrical shape with an angle with respect to the longitudinal direction. Thereby, the said cylindrical body is excellent in all of a diameter expansion property, a diameter reduction property, and a curve followable | trackability as a lining material, and becomes equipped with the high softness | flexibility which follows the inner surface shape or outer surface shape of a tubular body. . In addition, the tubular body has a high strength because the reinforcing fiber filaments continuously form a substantially tubular assembly without a break. Such a braid may be in the form of a round blank, a flat blank or a square blank, but more preferably a round blank formed in a hollow cylindrical shape. is there.

  Further, in the lining material, the cylindrical body is formed into a substantially cylindrical shape by a tape material obtained by cutting the sheet-like base material into a certain width along the fiber orientation direction or a knitted fabric in which a converging body of the tape material is knitted. The structure to form may be sufficient.

  Thereby, the said cylindrical body is knitted including a reinforcing fiber filament, and has high intensity | strength. In addition, the cylindrical body behaves as a tape material or a converging body of the tape material at an intersection or the like of a stitch, and the structure is easily deformed by the deformability and slipperiness due to the knitted fabric, and easily deformed by an external force. It becomes possible. For this reason, the cylindrical body has a small anisotropy as a lining material and can exhibit high strength, and has followability and flexibility suitable for the inner surface shape or outer surface shape of the tubular body. It will be a thing. Such a cylindrical body may be formed into a substantially cylindrical shape by joining the edges of a knitted fabric having a constant width, or may be formed by knitting into a substantially cylindrical shape from the beginning with a knitting machine. May be.

  Further, in the lining material, the cylindrical bodies are joined to edges of a tape material obtained by cutting the sheet-like base material into a certain width along a fiber orientation direction or a woven fabric in which a converging body of the tape material is woven. Then, it may be configured to be formed in a substantially cylindrical shape.

  Thereby, the said cylindrical body is woven including a reinforcing fiber filament and has high intensity | strength. Further, the cylindrical body behaves as a tape material or a converging body of the tape material at a crossing portion of the weave, and can be easily deformed by an external force. For this reason, it has high flexibility to follow the inner surface shape or outer surface shape of the tubular body. Moreover, the said cylindrical body has little elongation resistance as a lining material, anisotropy is small, and has high intensity | strength.

  In the lining material, the cylindrical body may be formed in a substantially cylindrical shape by joining edges of the sheet material made of the sheet-like base material.

  Thereby, the cylindrical body corresponding to the tubular body of various pipe diameters can be easily formed, the followability to the free curved surface can be enhanced as the lining material, and the inner surface or the outer surface of the tubular body can be lined without wrinkles. It becomes possible.

  In the lining material, it is preferable that the volume ratio of the reinforcing fiber filament to the sheet-like base material is 10 to 60 vol%.

  Thereby, a sheet-like base material is constituted under smooth impregnation properties, and mechanical properties as a lining material can be enhanced.

  Moreover, the said lining material WHEREIN: The structure which laminates | stacks the said some cylindrical body inside and outside, and makes it a multiple-layered substantially cylindrical shape may be sufficient.

  Thereby, the strength as a lining material can be further enhanced, and the characteristics of the cylindrical body can be made different from layer to layer, and various lining forms can be supported.

  The present invention includes a cylindrical body formed by forming a sheet-like base material in which a thermoplastic resin film and a reinforcing fiber filament are integrated into a substantially cylindrical shape with respect to a lining material for lining the inner surface or outer surface of a tubular body. Therefore, the impregnation property of the thermoplastic resin at the time of lining construction becomes extremely good, and a lining material having excellent mechanical properties can be obtained. Further, the lining material according to the present invention is different from a conventional composite material of a thermoplastic resin filament and a reinforcing fiber filament, and is configured to form the sheet-like base material into a substantially cylindrical shape, so that weaving, In the process of forming into a substantially cylindrical shape by knitting, assembling or the like, there is no inconvenience that fibers are cut by friction between fiber bundles. As a result, a high strength can be stably expressed, a completely impregnated lining layer can be formed in a relatively short time, and the construction time can be shortened.

It is sectional drawing which shows the lining material which concerns on Embodiment 1 of this invention. It is a fragmentary sectional view which shows an example of the sheet material which comprises the said lining material. It is a fragmentary sectional view which shows the other example of the sheet material which comprises the said lining material. It is sectional drawing which shows the other structural example of the said lining material. It is sectional drawing which shows the further another structural example of the said lining material. It is sectional drawing which shows an example of the tape material in the lining material which concerns on Embodiment 2 of this invention. It is explanatory drawing which shows an example of the convergence body in the said lining material. It is a perspective view which shows the lining material which concerns on Embodiment 2 of this invention. It is a perspective view which shows the other structural example of the said lining material. It is sectional drawing which shows the further another structural example of the said lining material. It is explanatory drawing which shows an example of the sheet material which comprises the lining material which concerns on Embodiment 3 of this invention. It is explanatory drawing which shows an example of the sheet material which comprises the lining material which concerns on Embodiment 4 of this invention. It is explanatory drawing which shows the lining construction method of a tubular body.

  Hereinafter, a lining material according to an embodiment of the present invention will be described with reference to the drawings.

  The lining material 1 which concerns on embodiment consists of a fiber reinforced composite material which uses a thermoplastic resin as a matrix. The lining material 1 is a tube formed by forming a sheet-like substrate 3 in which a large number of reinforcing fiber filaments aligned in one direction and a thermoplastic resin film are integrated by heating and pressing into a substantially cylindrical shape. The body is provided.

  The lining material 1 includes various forms depending on a combination of a thermoplastic resin and reinforcing fiber filaments, a structure of the sheet-like base material 3, a method of forming the sheet-like base material 3 into a substantially cylindrical shape, and the like. . Hereinafter, some of them will be described as examples and will be described as Embodiments 1 to 4.

(Embodiment 1)
1 to 3 show a lining material 1 according to Embodiment 1 of the present invention, FIG. 1 is a cross-sectional view showing the lining material 1 disposed inside a tubular body 5, and FIGS. 2 and 3 show the lining material 1. It is a fragmentary sectional view which shows the example of the sheet-like base material 3 to comprise.

  The lining material 1 linings the inner surface or outer surface of the tubular body 5, and as shown in FIG. 1, a cylindrical composite liner 11 is laminated inside and outside.

  The composite liner 11 is formed in a substantially cylindrical shape by a sheet-like base material 3 made of a fiber-reinforced composite material using a thermoplastic resin as a matrix. That is, the composite liner 11 is formed by making the sheet material 2 made of the sheet-like base material 3 into a cylindrical shape and overlapping and joining the edges thereof.

  2 and 3 are partial cross-sectional views showing examples of the sheet-like base material 3, respectively. The sheet-like base material 3 is a wide sheet-like base material in which a large number of reinforcing fiber filaments 31 aligned in one direction and a thermoplastic resin film 32 are integrated.

  In the example shown in FIG. 2, the sheet-like substrate 3 is integrated by arranging a large number of reinforcing fiber filaments 31 on both surfaces of a thermoplastic resin film 32. In the example shown in FIG. 3, the sheet-like substrate 3 is integrated by sandwiching a large number of reinforcing fiber filaments 31 in a sandwich shape between two thermoplastic resin films 32. In addition to the above, the sheet-like base material 3 may be in a form in which a large number of reinforcing fiber filaments 31 are arranged only on one side of the thermoplastic resin film 32, and the thermoplastic resin film 32 and the large number of reinforcing fiber filaments 31 and May be alternately stacked. In either case, the thermoplastic resin film 32 is melted by applying pressure while heating a large number of reinforcing fiber filaments 31 aligned in one direction and the thermoplastic resin film 32, and the molten resin is applied to the reinforcing fiber filaments 31. Impregnated and integrated.

  The sheet-like base material 3 does not have to be obtained by completely impregnating a large number of reinforcing fiber filaments 31 with the thermoplastic resin material of the thermoplastic resin film 32. That is, as shown in FIG. 2, at least a part of the reinforcing fiber filament 31 is in contact with or embedded in the thermoplastic resin film 32 in the cross section of the sheet-like substrate 3, and the thermoplastic resin film 32 is completely impregnated. It may be in a state where there is not a part, that is, in a semi-impregnated state (semi-preg state). The sheet-like substrate 3 can be a sheet-like substrate in a fully impregnated state or a semi-impregnated state, depending on the degree of integration of the reinforcing fiber filament 31 and the thermoplastic resin film 32.

  There are a wide variety of combinations of the thermoplastic resin material constituting the thermoplastic resin film 32 and the reinforcing fiber filaments 31 as the reinforcing material. Examples of the thermoplastic resin material include polypropylene (PP), high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), polyvinyl chloride (PVC), acrylonitrile / styrene (AS) resin, Acrylonitrile butadiene styrene (ABS) resin, polyamide (PA), polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinylidene fluoride (PVDF), tetrafluoroethylene resin (PTFE), polystyrene (PS), polyethylene Examples include terephthalate (PETP) or polybutylene terephthalate (PBTP). Examples of the reinforcing fiber filament 31 include glass fiber, carbon fiber, aramid fiber, ceramic fiber, and metal fiber.

  Thus, the sheet-like base material 3 is a continuous fiber reinforced resin body in which the reinforcing fiber filaments 31 are substantially impregnated or coated with the thermoplastic resin material. For forming the sheet-like substrate 3, for example, a large number of bundles of reinforcing fiber filaments 31 and the thermoplastic film 32 are respectively fed out from a feed roll device. At this time, the bundle of reinforcing fiber filaments 31 is fed out from a feed roll device or the like while aligning a plurality of bundles in a state where the fiber bundle of the reinforcing fiber filaments 31 is opened. Further, a large number of bundles of reinforced fiber filaments 31 are fed while being brought into contact with one surface or both surfaces of the thermoplastic resin film 32 and conveyed to a hot press apparatus. In that case, the sheet-like base material 3 which consists of various forms as above-mentioned by the lamination | stacking form of the fiber bundle of the reinforced fiber filament 31 and the thermoplastic resin film 32 can be formed.

  Then, the two bundles of the reinforcing fiber filaments 31 and the thermoplastic resin film 32 are sandwiched by the two rollers of the heating press device, and heated at a temperature equal to or higher than the melting temperature of the thermoplastic resin material constituting the thermoplastic resin film 32. Apply pressure. An arbitrary clearance is provided between the two rollers to regulate the thickness of the sheet-like substrate 3. The thermoplastic resin film 32 is melted, and the molten thermoplastic resin material is impregnated or semi-impregnated between a plurality of reinforcing fiber filaments 31 and then cooled. Thereby, the reinforcing fiber filament 31 and the thermoplastic resin film 32 are integrated, and the sheet-like base material 3 is obtained.

  The sheet-like base material 3 can be in a state where impregnation of the thermoplastic resin material between the reinforcing fiber filaments 31 is not complete, that is, a semi-impregnated state, by changing the heating condition and the pressurizing condition. In order to completely impregnate the thermoplastic resin between the reinforcing fiber filaments 31, it takes a long time to heat and pressurize. However, if it is in a semi-impregnated state, the time for heating and pressurization can be shortened, and the time required for forming the sheet-like substrate 3 can be shortened, so that it can be produced efficiently. Moreover, when it is in a semi-impregnated state, the reinforcing fiber filament 31 is likely to behave inside the sheet-like substrate 3, has flexibility, and can improve workability. Furthermore, even if the sheet-like base material 3 is in a semi-impregnated state, the sheet-like base material 3 is finally reheated and repressurized as a composite liner 11 at the time of lining construction and led to a completely impregnated state. Therefore, sufficient strength can be secured, and the heating and pressurizing time during lining construction can be shortened.

As a more specific configuration, as shown in FIG. 2, the sheet-like base material 3 is in a state in which the reinforcing fiber filaments 31 are partially embedded in the thermoplastic resin material constituting the thermoplastic resin film 32 in the cross section. Is formed. In such a semi-impregnated state, the total surface area of the reinforcing fiber filaments 31 is St (mm ² ), and the total surface area of the reinforcing fiber filaments 31 in contact with the thermoplastic resin material is Sa (mm ² ). The surface area ratio Sf (%) obtained by the following formula can be expressed.

Sf = Sa / St × 100 (%)
Here, by controlling the surface area ratio Sf to be 50% or more, the sheet-like base material 3 in a semi-impregnated state is obtained, which is suitable for the composite liner 11. On the other hand, if the surface area ratio Sf is less than 50%, the ratio of the unimpregnated portion is high, and the above-described effect cannot be obtained as the sheet-like substrate 3.

  Moreover, it is preferable that the sheet-like base material 3 controls content of the reinforced fiber filament 31 by the reinforced fiber volume ratio Vf (vol%; reinforced fiber content rate). That is, it is preferable to control the reinforcing fiber volume fraction Vf, which is the volume fraction of the reinforcing fiber filaments 31 occupying the entire constituent material of the sheet-like substrate 3, within a range of 10 to 60 vol%. Thereby, it becomes possible to express a high mechanical characteristic in the obtained sheet-like base material 3.

  More preferably, the reinforcing fiber volume fraction Vf is controlled within a range of 40 to 60 vol%. When the reinforcing fiber volume fraction Vf exceeds 60 vol%, the reinforcing fiber filament 31 may hinder the flow of the thermoplastic resin material when the sheet-like base material 3 is molded, the resin impregnation property is deteriorated, and smooth production is difficult. become. The reinforcing fiber volume fraction Vf in the sheet-like substrate 3 is preferably determined as appropriate according to the required strength of the tubular body 5 to be lined.

  Further, the sheet-like base material 3 is preferably formed with a thickness of 1 mm or less, more preferably 0.2 mm or less in order to provide a shape following ability that can correspond to various curved linings. preferable.

  In the present embodiment, the sheet-like base material 3 according to the above-described configuration is cut according to the inner diameter of the tubular body 5 to form a sheet material 2 having a certain width and length, and constitutes the composite liner 11 of the lining material 1. is doing. In the form shown in FIG. 1, the lining material 1 has a two-layer structure in which a composite liner 11 in which a sheet material 2 made of a sheet-like base material 3 itself is joined and formed in a substantially cylindrical shape (cylindrical shape) is arranged in an inner and outer double. It consists of The joint portion 11a of the composite liner 11 is joined by overlapping the ends of the sheet material 2 to form a single wrap or an offset lap and heat-sealing each other. The joint portion 11a of the composite liner 11 may be joined by sewing with a suture made of a thermoplastic resin material.

  Here, in the sheet material 2 composed of the sheet-like base material 3, the combination of the thermoplastic resin material constituting the thermoplastic resin film 32 and the reinforcing fiber filament 31 that is the reinforcing material, the sheet shape of the sheet material 2, and the lamination Examples relating to the configuration and the like are shown in Table 1.

  In Table 1, the laminated structure in the lowermost column shows a laminated form of the fiber bundles of the reinforcing fiber filaments 31 and the thermoplastic resin film 32 when the sheet-like substrate 3 is formed. As shown in FIG. 2, in the case where a large number of reinforcing fiber filaments 31 are arranged on both surfaces of the thermoplastic resin film 32, “fiber / film / fiber”, as shown in FIG. In the case where a large number of reinforcing fiber filaments 31 are sandwiched between the plastic resin films 32, they are indicated as “film / fiber / film”, respectively.

  Moreover, the lining material 1 is not restricted to the structure which arrange | positions the composite liner 11 inside and outside double as mentioned above. 4 and 5 are cross-sectional views showing other configuration examples of the lining material 1.

  The lining material 1 shown in FIG. 4 is comprised with the composite liner 11 which consists of a single layer. The lining material 1 having a single layer structure is suitable for the lining of a tubular body 5 having a relatively small diameter.

  As shown in FIG. 5, the lining material 1 may be composed of a three-layer composite liner 11. Further, the lining material 1 may have a multilayer structure of four or more layers by further laminating the composite liner 11. In the case of such a multilayer structure of three or more layers, for each layer, in the sheet material 2 constituting the composite liner 11, the type of the thermoplastic resin material is changed, the surface area ratio Sf of the reinforcing fiber filament 31 or the reinforcing fiber volume is changed. By making the rate Vf different, it becomes possible to form the lining material 1 having various characteristics. Thereby, it becomes possible to make the lining material 1 correspond to the required lining characteristics. When laminating the composite liner 11, it is preferable that the composite liners 11 are arranged uniformly in the circumferential direction so that the joint portions 11 a do not overlap each other.

  For example, in the lining material 1 having a three-layer structure shown in FIG. 5, the reinforcing fiber volume fraction Vf of the sheet material 2 (sheet-like base material 3) constituting the outermost layer is increased from the other layers to increase the strength, and the innermost layer is formed. The material characteristics of the thermoplastic resin material of the sheet material 2 (sheet-like base material 3) to be configured are high in heat resistance, oil resistance, chemical resistance, and the like. As a result, the lining material 1 can have high strength on the outer surface side where the external pressure acts, and the inner surface side affected by the fluid has resistance to the fluid. Examples of the thermoplastic resin material suitable for improving the heat resistance include PC, PA, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), PTFE, PVDF, and the like. Examples of the thermoplastic resin material suitable for improving oil resistance include PA, PTFE, PVDF, and the like. Examples of the thermoplastic resin material suitable for improving chemical resistance include polyethylene (PE), PP, PVC, PTFE, PVDF, and the like.

  If the entire lining material 1 is made to have high strength or a thermoplastic resin material having high chemical resistance is used, the material cost will be very high. However, as described above, it is possible to provide the optimum lining material 1 suitable for the tubular body 5 to be lined while suppressing the material cost by responding by changing the characteristics for each layer of the multilayer liner 11. Become. A construction method for lining the inner surface or outer surface of the tubular body 5 using the lining material 1 will be described later.

  In the lining material 1 having the above-described configuration, a part of the process of forming a lining layer that is a composite material molded body on the tubular body 5 by impregnating the thermoplastic resin material between the reinforcing fiber filaments 31 is performed on the lining. It can be performed in advance in the stage before construction, that is, in the process of forming the sheet-like substrate 3. As a result, it is possible to shorten the time required for heating and pressurization work at the lining construction site, and it is not necessary to set the heating temperature of the lining material 1 excessively high, and sufficient strength can be stably expressed. Is possible. As a result, a homogeneous lining layer can be formed quickly and economically on the tubular body 5.

(Embodiment 2)
Next, the lining material 1 which concerns on Embodiment 2 of this invention is demonstrated, referring FIGS. 6-10.

  In the first embodiment, the sheet material 2 using the sheet-like base material 3 as it is as the composite liner 11 which is a cylindrical body is joined and formed in a substantially cylindrical shape. In the present embodiment, instead, the composite liner 11 is constituted by a cylindrical body formed as a braid using a modified sheet-like base material 3.

  In each of the following embodiments including this embodiment, the configuration of the sheet-like substrate 3 is as described in the first embodiment. Therefore, in the following description, the characteristic configuration of the composite liner 11 (cylindrical body) formed in a substantially cylindrical shape will be described in detail, and the other configurations will be described using the same reference numerals as those in the first embodiment. Is omitted.

  FIG. 6 is a cross-sectional view showing an example of the tape material 4 in the lining material 1 according to the second embodiment, and FIG. 7 is an explanatory view schematically showing an example of the converging body 40 of the tape material 4.

  In this form, the sheet-like base material 3 is used as a tape material 4 that is cut into a constant width along the fiber orientation direction of the reinforcing fiber filaments 31 contained therein and is formed into a long strip shape. The composite liner 11 is configured by a braided material using the tape material 4 or the aggregate 40 of the tape material 4 as a braid.

  The sheet-like base material 3 is heated and pressed in the forming process, and then cut and formed into a fixed width and deformed into a narrow tape material 4. While the tape material 4 is transporting the sheet-like base material 3 in the form of a wide sheet, a plurality of slits are pressed against the sheet-like base material 3 by pressing a plurality of cutter blades arranged at predetermined intervals. It is molded so as to have a certain width by cutting along the fiber orientation direction.

  The tape material 4 may be formed into a substantially cylindrical assembly by itself, but as shown in FIG. 7, as a flat converging body (fiber bundle) 40 in which a plurality of tape materials 4 are converging, It is preferably formed into a braid or a woven or knitted fabric described later.

  For example, the tape material 4 is formed in a long band shape having a width of 10 mm and a thickness of 0.12 mm. Fifteen tape members 4 are bundled to form a converging body 40. The lining material 1 according to the second embodiment is formed of a composite liner 11 of a braid that uses the converging body 40 as a braid.

  8 and 9 are perspective views showing examples of the lining material 1 according to the second embodiment. The composite liner 11 constituting the lining material 1 is constituted by a round punched assembly in which a large number of braids 41 made of a converging body 40 are crossed with each other and given an angle with respect to the longitudinal direction. In this case, for example, 64 pieces of the braided yarn 41 made of the converging body 40 are used to form a 64 piece round punched assembly. The round braid is formed by crossing a plurality of braids 41 on a mandrel in a left-handed manner and a right-handed manner. For this reason, the round punched product is formed in a hollow cylindrical shape and can be used as the composite liner 11 as it is.

  In the illustrated composite liner 11, the assembly angle of the round punched assembly is 60 °. The braided angle is an angle formed by the braided yarn 41 with respect to the central axis of the mandrel, and the density of the braided yarn 41 increases as it approaches 90 °. It is preferable to form a braid as a range of °.

  Further, in the composite liner 11 shown in FIG. 9, the central yarn 42 made of reinforcing fibers is incorporated in the axial direction between the braided yarns 41 so as to reinforce in the axial direction. As the reinforcing fiber of the central yarn 42, glass fiber, carbon fiber, aramid fiber, or the like can be used. Further, as the center yarn 42, an organic fiber having a glass transition point equal to or higher than the melting point of the thermoplastic resin material contained in the braid 41 and having a large elongation at break may be used. By incorporating the central yarn 42 between the braided yarns 41, the movement of the braided yarn 41 is restrained around the central yarn 42, and it is possible to prevent the yarn from being expanded or contracted more than necessary.

  In the cylindrical composite liner 11 made of such a braid, the braids 41 arranged in a plurality of directions are easy to move with each other, and the crossing angle thereof is also likely to change. Therefore, the composite liner 11 is excellent in all of the diameter expansion property, the diameter reduction property, and the curve following property, is easy to handle, and has high flexibility that can follow the inner surface shape or the outer surface shape of the tubular body 5. It becomes. In addition, the braided yarn 41 including the reinforcing fiber filaments 31 is crossed over the entire length of the composite liner 11, and the reinforcing fiber filaments 31 can be continuously arranged without a break, so that it has extremely high strength. Can be made.

  Therefore, by configuring the lining material 1 with the composite liner 11 made of a braid, sufficient strength can be ensured, and when the tubular body 5 is coated with a lining, the surface of the tubular body 5 is sufficiently rough and uneven. It follows and deforms, and the followability with respect to a free cross section such as a bent pipe line is improved, and it is possible to follow the tubular body 5 without wrinkles.

  The composite liner 11 made of a braid changes the type of the thermoplastic resin material constituting the thermoplastic resin film 32 of the tape material 4, that is, the sheet-like base material 3, for each braid 41, or the reinforcing fiber filament 31. By varying the surface area ratio Sf (%) and the reinforcing fiber volume ratio Vf (vol%), various characteristics can be provided. Thereby, the lining material 1 can be made to correspond to the required lining characteristics.

  Moreover, the lining material 1 can also be made into the lining material of a multilayer structure by laminating | stacking the composite liner 11 which consists of a structure inside and outside. FIG. 10 is a cross-sectional view showing an example of a lining material 1 having a multilayer structure.

  The lining material 1 shown in FIG. 10 has a three-layer structure in which three layers of composite liners 11 made of a braid are laminated inside and outside. In this case, the characteristics of the composite liner 11 can be made different in each layer. For example, the composite liner 11 of the outermost layer sets the reinforcing fiber volume fraction Vf in the tape material 4 (sheet-like base material 3) constituting the braided yarn 41 to 50 to 60 vol% and is set higher than the other layers, Strength can be improved. Moreover, the composite liner 11 of the innermost layer is made by using a thermoplastic resin material in the tape material 4 (sheet-like base material 3) constituting the braided yarn 41 as a material having high heat resistance, oil resistance, or chemical resistance. , Having the characteristics.

  In addition, in the lining material 1 having a multi-layer structure made of a braid, by arranging a braid composed of a bundle of tape materials made only of a thermoplastic resin material in the innermost layer or the outermost layer, water tightness is improved, It is also possible to improve water resistance and water pressure resistance.

  Further, the braid in the lining material 1 is not only constituted by the round punched braid, but also a flat braid in which the braid is oriented obliquely with respect to the longitudinal direction, or the braid has a braided structure and has a prismatic structure. You may comprise by the square hammering thing which makes a type | mold.

(Embodiment 3)
Next, the lining material 1 which concerns on Embodiment 3 of this invention is demonstrated, referring FIG. FIG. 11 is an explanatory diagram schematically showing an example of the sheet material 2 constituting the lining material 1 according to the third embodiment.

  In the second embodiment, the composite liner 11 that is a cylindrical body is configured to be a braid using the tape material 4 made of the sheet-like base material 3 or its converging body 40. In the present embodiment, instead of this, the composite liner 11 is constituted by the sheet material 2 woven from the tape material 4 or the converging body 40 thereof.

  The sheet material 2 constituting the lining material 1 is composed of a tape material 4 obtained by cutting the sheet-like base material 3 into a certain width along the fiber orientation direction or a woven fabric obtained by weaving a bundling body 40 thereof. That is, the lining material 1 is composed of a composite liner 11 formed in a substantially cylindrical shape by joining ends of a sheet material 2 made of a woven fabric.

  The illustrated sheet material 2 is formed by weaving the bundling body 40 of the tape material 4 shown in FIG. The tape material 4 is formed in a long strip shape having a width of 3 mm and a thickness of 0.12 mm, for example. And the bundling body 40 is woven in the vertical direction and the horizontal direction, and the sheet material 2 is formed by a plain weave structure of a biaxial woven fabric.

  The sheet material 2 is not limited to a biaxial woven fabric, but may be a triaxial woven fabric in which the converging bodies 40 are woven in three intersecting directions. Further, the sheet material 2 is not limited to a plain weave, and may be a woven fabric having any structure such as a twill weave or a satin weave.

  The sheet material 2 formed by weaving the bundling body 40 is formed into a substantially cylindrical shape as described in the first embodiment, and the composite liner 11 is formed by joining the edges. . As shown in FIG. 1 and the like, the joint portion 11a of the composite liner 11 is joined with a suture thread or the like made of a thermoplastic resin material by overlapping the ends of the sheet material 2 and heat-sealing them together. The Further, as the lining material 1, the composite liner 11 made of a woven fabric may have a single layer structure as shown in FIG. 4 or may be laminated inside and outside to have a multilayer structure as shown in FIG. Good. When the lining material 1 is configured by laminating the composite liner 11, it is preferable that the joint portions 11a are arranged uniformly in the circumferential direction so as not to overlap each other.

  In this embodiment, since the sheet material 2 constituting the composite liner 11 of the lining material 1 is a woven fabric composed of the tape material 4 or its converging body 40, the anisotropy of the blended reinforcing fiber filament 31 is small and high. It will have strength. In addition, the composite liner 11 made of woven fabric has low elongation resistance and high flexibility, so that the followability to a free-form surface can be improved and the tubular body 5 can be lined without wrinkles.

(Embodiment 4)
Next, the lining material 1 which concerns on Embodiment 4 of this invention is demonstrated.

  In the third embodiment, the composite liner 11 is configured to be a woven fabric using the tape material 4 made of the sheet-like base material 3 or its converging body 40. In the present embodiment, instead of this, the composite liner 11 is constituted by a cylindrical body obtained by knitting the tape material 4 or the converging body 40 thereof.

  Also in this case, the lining material 1 is constituted by the tape material 4 shown in FIG. 6 and FIG. 7 or the bundling body 40 thereof, which is obtained by cutting the sheet-like substrate 3 into a certain width along the fiber orientation direction. Further, as shown in FIG. 1, FIG. 4, or FIG. 5, the sheet material 2 composed of the tape material 4 or the knitted body 40 of the bundling body 40 is joined to the ends thereof to form a substantially cylindrical composite liner. 11 is configured.

  Various knitted fabric structures are possible as the knitted fabric constituting the composite liner 11. For example, as the sheet material 2, the converging bodies 40 of the tape material 4 are oriented in the vertical direction and the transverse direction, and the converging bodies 40 are oriented and laminated in directions other than these biaxial directions, and the warp knitting structure It is preferable to make a multiaxial fabric as shown in FIG.

  The sheet material 2 made of such a multiaxial laminate has a high degree of freedom in fiber arrangement of the reinforcing fiber filaments 31 included in the converging body 40. Therefore, the fiber orientation of [+ 60 ° / −60 °] or the fiber orientation of [+ 45 ° / −45 °] with respect to the axial direction, and various fiber arrangement forms laminated in a plurality of layers. Can be formed. By having an oblique fiber orientation with respect to the axial direction, the tubular composite liner 11 can be provided with axial stretchability.

  The sheet material 2 obtained by knitting the converging body 40 has a substantially cylindrical shape as described in the first embodiment, and is made into the composite liner 11 by joining the end sides. Also in this case, the joint portion 11a of the composite liner 11 is joined by a fusion thread made of a thermoplastic resin material or the like by overlapping the ends of the sheet material 2 and thermally fusing them.

  The lining material 1 may have a single layer structure as shown in FIG. 4 or a multilayer structure as shown in FIG. 1 or FIG. Good. When the lining material 1 is configured by laminating the composite liner 11, it is preferable that the joint portions 11a are arranged uniformly in the circumferential direction so as not to overlap each other.

  In this embodiment, since the sheet material 2 constituting the composite liner 11 of the lining material 1 is a knitted fabric made of the tape material 4 or the bundling body 40, the anisotropy of the blended reinforcing fiber filaments is small and high strength is achieved. Have. Further, the composite liner 11 made of a knitted fabric has high flexibility and followability with respect to a free-form surface, and can follow the tubular body 5 without wrinkles. The composite liner 11 may be made of a knitted fabric obtained by knitting the tape material 4 or the converging body 40 in a substantially cylindrical shape.

  The lining material 1 having the various configurations as described above is a process in which a thermoplastic resin material is impregnated between the reinforcing fiber filaments 31 and a lining layer that is a composite material molded body is formed on the tubular body 5. Is performed in advance at the stage before lining construction, that is, at the molding stage of the sheet-like substrate 3. As a result, it is possible to shorten the time required for heating and pressurization work at the lining construction site, and it is not necessary to set the heating temperature of the lining material 1 excessively high, and sufficient strength can be stably expressed. Is possible. As a result, a homogeneous lining layer can be formed quickly and economically on the tubular body 5.

  Moreover, the lining material 1 is the structure which shape | molds the sheet-like base material 3 in a substantially cylindrical shape unlike the thing which consists of a composite material of the conventional thermoplastic resin filament and a reinforced fiber filament. Therefore, it is said that the reinforcing fiber filaments are cut by friction between the sheet materials 2, the tape materials 4, or the bundling bodies 40 even after the process of forming into a substantially cylindrical shape such as weaving, knitting, or assembling described above. There is no inconvenience, and the desired strength can be provided.

  The sheet material 2 comprising the tape material 4 or the bundling body 40 is a uniaxial, biaxial, or multiaxial stitched sheet material that is stitched by laminating fiber bundles in one direction or at different angles in addition to the woven fabric or the like. Or any other form. Further, the lining material 1 may have a configuration in which a coating layer made of a material having high water tightness is added to the outer side of the outermost layer of the composite liner 11 and is not limited to the above embodiments.

(Lining construction method)
FIG. 13 shows an example of a lining construction method using the lining material 1 according to each of the above embodiments, and is an explanatory diagram when the inner surface side of the tubular body 5 is lined.

  As shown in FIG. 13, the lining material 1 is used by being inserted into a tubular body 5 that is a lining object. Prior to the lining operation, when there is running water such as clean water or sewage in the tubular body 5, the running water is blocked by the blocking member 7, and the flowing water is once removed from the pipeline. Further, foreign matter such as deposits and wood chips present in the tubular body 5 is removed, and after performing high-pressure water washing, the lining operation in the pipe is started.

  For example, the lining material 1 is prepared with a length obtained by adding an extra length to the length between the start-side manhole M1 and the arrival-side manhole M2. Further, a device such as a winch 9 that winds the pulling wire 91 is installed on the ground side of the arrival side manhole M2. The pulling wire 91 is inserted into the tubular body 5 from the reaching side manhole M2, and pulls the heating device 6 provided inside the lining material 1 from the starting side manhole M1 toward the reaching side manhole M2.

  A heating device 6 is installed inside the lining material 1 arranged in the tubular body 5. The heating device 6 includes a lining pig 61 having a cylindrical outer shape along the inner peripheral surface of the lining material 1, and a cylindrical auxiliary pig 62 externally mounted on the lining material 1. The lining pig 61 heats the lining material 1 from the inner peripheral side with heating steam or the like, and melts the thermoplastic resin material (matrix material) constituting the composite liner 11 of the lining material 1. The auxiliary pig 62 heats the outer peripheral surface of the lining material 1 and assists the melting of the thermoplastic resin material from the outer peripheral side. The lining pig 61 of the heating device 6 has a tapered shape in which the rear portion is expanded in diameter, and the lining material 1 is softened by heating and moving forward so that the diameter of the lining material 1 is gradually increased. To do.

  In such a heating step, heating is performed at a temperature equal to or higher than the melting point of the thermoplastic resin material included in the lining material 1. Thereby, the thermoplastic resin material of the lining material 1 is melted, and the composite liner 11 forms a composite material layer in which the reinforcing fiber filaments 31 are mixed.

  For example, in the lining material 1, when polypropylene (melting point is about 160 to 170 ° C.) is adopted as the thermoplastic resin material constituting the thermoplastic resin film 32 of the sheet-like base material 3, The heating temperature is set to 180 ° C. When high-density or low-density polyethylene (melting point is 140 ° C.) is adopted as the constituent material of the thermoplastic resin film 32, the heating temperature in the lining construction process is set to 150 ° C., for example.

  The lining material 1 is not yet in a state where the diameter has been completely expanded and cured after the heating step, and is not in a state of being in close contact with the inner surface of the tubular body 5. The heating device 6 includes a diameter-expanding means on the rear side, and is pressurized from the inside by the diameter-expanding means to be expanded in a tubular shape along the inner peripheral surface of the tubular body 5. In the illustrated diameter expanding means, the reversing machine 8 is installed on the ground and includes a diameter expanding tube 81 that is introduced while being reversed from the tip side.

  The diameter-expanding tube 81 can be sufficiently expanded by an internal pressure, and is formed of an elastomer having excellent expandability and heat resistance that has sufficient strength during expansion. The diameter-expanding tube 81 is formed of a material that does not adhere the diameter-expanding tube 81 and the first liner base material 21 even after the diameter is expanded. The outer diameter of the tube 81 for diameter expansion is ensured with a size capable of pressing the lining material 1 from the inside to the inner peripheral surface of the tubular body 5 at the time of maximum expansion.

  The diameter expansion tube 81 is connected to the reversing machine 8 installed on the ground on the start side manhole M1 side, and is introduced into the lining material 1 in an unexpanded state. Then, the pressurized gas is supplied from the reversing machine 8 to the diameter expanding tube 81, and the inner peripheral surface is expanded while being reversed to the outer peripheral side while following the rear portion of the heating device 6. Along with this, the diameter of the lining material 1 is increased by being pressed from the inside by the diameter-expanding tube 81 in order from the softened portion through the heating device 6. The expanded part of the lining material 1 is in close contact with the inner surface of the tubular body 5. As the heating device 6 moves forward, the expansion range of the diameter expansion tube 81 is also expanded forward, and the close contact state between the lining material 1 and the tubular body 5 is maintained as it is, and a uniform force can be applied over a wide range. Can be formed uniformly.

  When the diameter of the lining material 1 is expanded over the entire area of the lining target portion of the tubular body 5, it is cooled and cured, whereby the inner surface of the tubular body 5 is covered with the composite material molded body of the lining material 1.

  As described above, the lining material 1 has a configuration including the cylindrical composite liner 11 made of the sheet-like base material 3. Therefore, in the lining construction process, the thermoplastic resin material and the reinforcing fiber filament included in the composite liner 11 are used. Can be completely impregnated in a relatively short time. Thereby, the structure which disperse | distributed the reinforcing fiber filament 31 in the thermoplastic resin material can be obtained over the whole lining material 1, and the shortening of the construction time for it can be aimed at. Moreover, since it is not necessary to raise the heating temperature with respect to the lining material 1 excessively, it can also avoid that the thermoplastic resin material flows and becomes uneven.

  Further, the lining material 1 made of the fiber reinforced composite material is easy to handle and has a curved surface inside the tube of the tubular body 5 because it has high flexibility and excellent shape stability regardless of the form. The shape following ability is also high. Therefore, the tubular body 5 can be lined with good workability, and a lining layer that is sufficiently adhered to the inner surface or the outer surface of the tubular body 5 can be formed. Moreover, the said sheet-like base material 3 closely_contact | adheres to the inner surface or outer surface of the tubular body 5 by heating and pressurizing, and is integrated. For this reason, the sheet | seat material 2 which cut the sheet-like base material 3 to the required dimension can be used also as a partial reinforcement restoration material in the inner surface or the outer surface of the tubular body 5. FIG. In this case, the sheet material 2 is adhered to the lining material 1 so that the density of the reinforcing fiber filaments 31 can be increased at that portion, and the thermoplastic resin material can be made thicker. It can be further increased.

  The tubular body 5 that is lined using the lining material 1 is not limited to the existing pipes that constitute the sewer buried in the ground as described above, but various tubular bodies such as waterworks pipes and agricultural water pipes. 5 can be applied to the tubular body 5 having various tube diameters and shapes. In the case of water supply pipes, there are many cases where there are sharp bends in the pipeline, but according to the lining material 1 with excellent shape followability, handling is easy, workability is excellent, and even in the bends. A highly reliable and reliable lining layer can be formed. In addition, the lining material 1 can be used not only to be applied to the inner surface of the tubular body 5 but also to reinforce and repair the outer surface of the tubular body 5. Therefore, the above-described embodiment is merely an example and is not limited.

  INDUSTRIAL APPLICATION This invention can be utilized suitably for lining of the tubular body using the lining material which consists of a thermoplastic resin composite material.

DESCRIPTION OF SYMBOLS 1 Lining material 11 Composite liner 2 Sheet material 3 Sheet-like base material 31 Reinforcing fiber filament 32 Thermoplastic resin film 4 Tape material 40 Converging body 41 Braiding yarn 42 Central yarn 5 Tubular body 6 Heating device 61 Lining pig 62 Auxiliary pig 8 Reversing machine 81 Diameter expansion tube 9 Winch 91 Pulling wire M1, M2 Manhole

Claims (7)

A lining material for lining the inner surface or outer surface of a tubular body,
A cylindrical body is formed by forming a sheet-like base material in which a large number of reinforcing fiber filaments aligned in one direction and a thermoplastic resin film are integrated by heating and pressing into a substantially cylindrical shape. Lining material characterized by The lining material according to claim 1,
The cylindrical member is formed of a tape material obtained by cutting the sheet-like base material into a certain width along a fiber orientation direction, or a braided material including a bundle of the tape material as a braid. The lining material according to claim 1,
The cylindrical body is formed in a substantially cylindrical shape by a tape material obtained by cutting the sheet-like base material into a certain width along a fiber orientation direction or a knitted fabric obtained by knitting a converging body of the tape material. Lining material. The lining material according to claim 1,
The cylindrical body is formed in a substantially cylindrical shape by joining edges of a tape material obtained by cutting the sheet-like base material into a certain width along a fiber orientation direction or a woven fabric in which a converging body of the tape material is woven. Lining material characterized by that. The lining material according to claim 1,
A lining material, wherein the cylindrical body is formed in a substantially cylindrical shape by joining edges of a sheet material made of the sheet-like base material. In the lining material according to any one of claims 1 to 5,
The lining material, wherein the sheet-like base material has a volume ratio of reinforcing fiber filaments to the sheet-like base material of 10 to 60 vol%. In the lining material according to any one of claims 1 to 6,
A lining material characterized in that a plurality of cylindrical bodies are laminated on the inside and outside to form a plurality of substantially cylindrical shapes.

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