WO1988000133A1

WO1988000133A1 - Lining material for duct

Info

Publication number: WO1988000133A1
Application number: PCT/JP1986/000336
Authority: WO
Inventors: Masakatsu Hyodo; Isaburo Yagi
Original assignee: Ashimori Kogyo Kabushiki Kaisha
Priority date: 1986-06-30
Filing date: 1986-06-30
Publication date: 1988-01-14
Also published as: NO873635L; DE3690685T1; NO873635D0

Abstract

A lining material formed by providing a nonwoven fabric of a special shape on the inner side of a conventional air-tight tubular woven cloth which has a synthetic resin film on the outer surface thereof, and which is adapted to be inserted into a duct as it is turned inside out by a fluid pressure. The lining material according to this invention has various properties required in conventional lining materials of this kind, and also other properties, such as earthquake resistance and shape-retentivity under an external hydraulic pressure, and is suitably used to reinforce various kinds of underground pipes.

Description

Specification

Lining material for pipeline

Technical field

TECHNICAL FIELD The present invention relates to a gas pipe, a water pipe, a sewer pipe, a laying line for a power line, a communication line, and the like, and a lining for a pipe buried mainly underground, such as an oil oil line. More specifically, the present invention relates to a nonwoven fabric having a special shape inside a hermetic tubular woven fabric which has a synthetic resin skin on the outer surface and is inserted into the pipe while being turned upside down by fluid pressure. The present invention relates to a lining material for a pipeline, which has a cloth, and has properties such as a repelling property and a form-retaining property of outside water, as well as a singing property required for a conventional lining material. ,

Background art.

In recent years, for the purpose of repair and reinforcement when the underground pipes are deteriorated as described above, these pipes have been lined on the inner surface. As one of the methods, an adhesive is applied to the inner surface of a tubular lining material, and the lining material is inserted through a pipeline while being turned upside down by fluid pressure. The lining material is adhered to the inner surface of the pipe via an adhesive between the road and the lining material (an example is US Pat. No. 4,368,091 and US Pat. No. 4,334,943). No. 58-38088, Japanese Patent Publication No. 58-5165, and Japanese Patent Publication No. 59-12911). This method does not require excavation of pipes over the entire length, and can be carried out only by forming manholes only at both ends of the pipe section to be lined. Lining j? The work itself can be performed on a long pipeline in a short time, and it can be performed even on a pipeline with many bends. This is an extremely excellent method.

And at the time, this kind of lining! The lining used in the construction method is made of thin, flexible plastic tubing, woven or non-woven fabric in a tubular shape, and its outer surface is air-tight and water-tight. Various materials have been proposed, such as a fibrous lining material formed with a material.

For example, Japanese Patent Publication No. 55-43890 (British Patent No. 1,449,455) discloses an impermeable membrane on felt and / or fabric and a material made of a flexible foaming agent. A lining material composed of an enclosed flexible resin-absorbing material is disclosed. Also, Japanese Patent Publication No. 58-33098 discloses that this impermeable membrane, which is made of a flat web laminate composed of a resin absorbing layer having an impermeable layer on one side, comes to the outside. Thus, it describes a lining j-forest that has a tubular form, both ends are traversed with a thread, and then the entire suturing surface is covered with a sealing rib or coating, and a method for producing the lining. The specifications of U.S. Pat. Nos. 4,334,943 and 4,368,091 show a lining which is woven tubular with synthetic fiber warps and wefts and which is coated with a resin on the outside. A similar lining of a tubular woven fabric in which a flexible rubber or plastic coating is formed on the outer surface of a tubular woven fabric is described in Japanese Utility Model Publication No. 56-3619. Further, Japanese Patent Application Laid-Open No. 56-8229 discloses a tubular woven fabric in which a fiber is woven in a tubular shape for the purpose of improving the above-mentioned pipe liner. A flexible rubber or plastic film is formed on the outer surface of the lining, and when the pressure is applied to the minimum fluid pressure, the outer diameter expands 7 to It has been disclosed. Also, Japanese Patent Application No. 58-1 0236-1 discloses that a tubular woven fabric in which a warp and a weft of synthetic fiber are woven in a tubular form has an internal void inside or outside and has a predetermined thickness. It describes a pipe liner in which a tubular cloth having a high degree of flexibility is laminated and an airtight layer of a synthetic resin is formed on the outer surface thereof.

On the other hand, when the above-mentioned pipe line method is applied to a pipe for transporting a fluid such as a gas pipe, a water pipe, a sewer pipe, and an oil line, it is used in this method. Initially, the lining was required to have no leakage of the transport fluid, flexibility to be able to follow the curved part of the pipeline, strength to withstand the pressure of the internal fluid, durability of the coating, etc. With the general use of the pipe lining method of the above type, the lining material has been required to have various characteristics depending on the environment of the pipeline to be applied, the nature of the land, etc. . At present, the following properties are required for lining materials.

(1) Seismic isolation

When a large external force such as an earthquake is applied to the fluid transport pipeline and the pipeline is damaged, the lining will not be broken together. It is necessary to maintain the pipe function of fluid transportation. For this purpose, it is necessary to have seismic energy absorption as well as anti-seismic properties. In the present specification, this performance is defined as “seismic isolation”. This seismic isolation The lining material has sufficient strength in the longitudinal direction to have the property, and has enough strength to break the lining material before the adhesive causes shear failure. is necessary. In addition, if it has seismic isolation characteristics, the pipeline itself will crack or break due to land subsidence in the pipeline buried in soft ground or landfill. In the event of a disaster, the pipe function can be maintained and responded to the situation. Particularly in recent years, with the advancement of earthquake prediction technology, the possibility of earthquakes has been pointed out in various places, and especially in areas where these earthquakes are expected to occur, the use of pipe linings This seismic isolation is an important characteristic.

(2) External water pressure retention

When a pipe is corroded and a hole is formed, groundwater or the like intrudes through the hole, and the water pressure of this groundwater causes the lining material to be crushed and the flow path in the pipe to be narrowed. If there is. Also, if the pipeline breaks due to an earthquake or the like, lining! ) Since external pressure is directly applied to the material, it is necessary to withstand this E force. Is it important to have the ability to withstand the pressure from the outside and secure the flow path without being crushed? In the present specification, this property is defined as external water pressure retention.

The water resistance and hardness of the adhesive are important for the lining material applied to the pipeline to have external water pressure retention. It is also necessary that this adhesive has a sufficient thickness. Therefore, the lining material is required to include a sufficient amount of adhesive. Conventionally, this type of adhesive has been used for epoxy resin and unsaturated. Reester resin, acryl resin, urethane resin, etc. are used, but pipes may be laid in places where groundwater can enter. Therefore, even in water, the curing reaction proceeds without being hindered and achieves adhesion, and even after curing, the adhesive strength is reduced due to the effect of water, and the strength is required. . From this point of view, unsaturated polyester resins and acrylic resins that use peroxide as a curing agent may not cure in the presence of water. , I like it. It is also desirable to use a solvent such as styrene monomer.ゥ Resin-based resin can be cured in water, but it can be cured. '(' Adjustment of the time required for administration is troublesome, and the monomer content is water-soluble. It is also preferable because it can cause environmental pollution, so the adhesive suitable for the lining material used in this type of pipeline is a epoxy resin, and the curing agent is also a medium However, it is preferable to use aromatic or aliphatic ^ liamin because it can be hardened even in water.

However, it is difficult to reduce the viscosity of these epoxy resins, and some measures must be taken to ensure that the above-mentioned fiber layer is impregnated. Become. Even if the entire textile layer is impregnated with evoquine-based resin, it is difficult to make the entire layer completely watertight, and water seepage occurs when external water pressure is applied from outside. Phenomena also occur. As a result, the resin skin is also affected by the external water pressure, and if the separation strength with respect to the fibrous layer decreases, the skin separates from the fibrous layer and blocks the fluid passage. There is a risk. Therefore, a large change in the separation between the resin film and the fiber layer is also required as one of the conditions for withstanding the external water JE. In addition, since the external water pressure retention depends on the thickness of the lining material, it is necessary to completely incorporate the adhesive when using multiple fiber layers.

A) Internal pressure resistance

In the case of a fluid transport line, the lining material supports the pressure of the fluid when the line breaks, so it must be able to withstand that pressure. Also lining! ? When applying the material to the pipe, it is necessary to turn the material inside out.) The fluid pressure must be sufficient to prevent the lining material from breaking down. I do.

(4) Flexibility

When applying the lining material to the pipeline, since the lining material is turned over by the fluid E force, it is necessary that the lining material itself is flexible and does not require high pressure to turn it over. You. This property is important because it becomes difficult to turn over the lining material especially when the thickness of the fiber layer is large.

The conventional lining material described above can satisfy some of these necessary properties, but satisfies all of these properties.

For example, the linings described in JP-B-55-43890 and JP-B-58-333098 are not basically used non-iron cloth.] Adjustment is possible, so a lining with sufficient thickness can be obtained. However (Ma)

However, the nonwoven fabric itself has a small change in strength, and thus lacks seismic isolation, and lacks any measures to ensure the impregnation with the epoxy resin. Due to the non-woven fabric, the internal resistance is low, and any means can be taken to improve the adhesive strength between the resin film and the fibrous layer.

The lining material described in Japanese Utility Model Application Publication No. 56-3619 and Japanese Patent Application Laid-Open No. Sho 56-8229 is basically made of cloth. Significantly, it is possible to further increase the strength by changing the manufacturing method. Therefore, seismic isolation and internal pressure resistance are large, but it is difficult to increase the thickness of the woven fabric. For general clothing, it is not difficult to obtain a thick one by devising the weave. However, the tubular woven fabric of the lining material is woven in a tubular shape using a circular loom, but the circular loom can form a woven fabric having a complicated structure. As described above, shika must also be woven with great strength and thick, and like a thick garment for clothing, it can be thickened with a core yarn or backing yarn. It's awesome. Thick yarn can be used to increase the thickness, but the rigidity of the yarn makes it difficult to turn it over when applying a lining material to a pipeline, and irregularities on the fabric surface Increases the fluid resistance of the fluid to be transported over a large distance. Also, the use of extra thick yarn has a coarse texture, and the adhesive cannot be held by the fabric itself. For this reason, the external water pressure retention is poor, and no consideration has been given to improving the bonding strength between the fiber layer and the resin film. Although the lining described in Japanese Patent Application No. 58-10236-1 satisfies all of the above properties to some extent, the impregnating property of the adhesive, especially the epoxy resin Means for fully impregnating the nonwoven fabric as a tubular pig cloth from the cloth to the woven cloth have been devised. No consideration has been given to increasing the cone strength of these.

Under these circumstances, the lining material described in the specification of Tokuton, No. 58-1 023 61] was further improved, and the lining material described above was required. There was a great demand for developing an improved lining material that satisfies all of the above. In view of such circumstances, the present invention has been made to further improve the lining material described in Japanese Patent Application No. 58-102361.

It is an object of the present invention to provide a seismic isolation and outside water without deteriorating the flexibility, adhesive impregnation property, internal pressure resistance, etc. of a conventional pipeline lining forest. It is intended to provide lining materials used for pipelines having shape retention, especially for pipelines buried underground.

Another object of the present invention is to use a tubular woven fabric and a tubular nonwoven fabric as the tubular woven fabric, to impregnate the adhesive, to separate the resin film from the tubular fabric, and to remove the tubular fabric from the tubular fabric. Providing a lining material for pipelines with improved seismic isolation and external water pressure retention without increasing the separation strength from the cloth and without impairing the characteristics of the conventional lining material It is to be.

Still another object of the present invention is to provide a tubular woven cloth as a tubular cloth. In addition, a tubular non-woven fabric having a special shape and structure is used inside the tubular cloth to provide a lining material which satisfies all the characteristics required for a lining material for pipelines.

Disclosure of the invention

The present inventors have conducted intensive studies in order to further improve the properties of the lining material described in the specification of No. 58-1 0236, No. 1 in the case of Machiton, and a tube having a resin skin on the outer surface. Conventionally, a through hole formed by punching is provided evenly inside the fabric, and a tubular fabric formed by special sewing is introduced. The disadvantages of this lining material have been overcome, and we have succeeded in obtaining a lining material that satisfies all the required characteristics.

In other words, according to the present invention, a tubular lining material having an adhesive applied to the inner surface is passed through the pipe, and the inside of the pipe is turned upside down by the fluid pressure, and the inside lining is turned upside down. The above-mentioned lining used in the method of lining a pipeline, in which the material is bonded to the inner surface of the pipeline with the adhesive interposed between the lining material and the pipeline while the material is pressed against the inner surface of the pipeline. The lining material is made of an airtight tubular woven fabric woven in a tubular shape with a synthetic resin film formed on the outer surface, and a substantially uniform punch inserted inside the woven fabric. A lining material for a pipeline characterized by being formed of a tubular cloth for impregnating an adhesive with a nonwoven fabric having a formed through hole.

Further, according to the present invention, the non-iron cloth is sufficiently impregnated with an adhesive, for example, an epoxy resin, and the air-tight tubular woven cloth is further passed through the non-iron cloth. Fully impregnate the resin As a result, the nonwoven fabric and the woven fabric are integrated to increase the strength and improve the seismic isolation.- At the same time, even when external water is added, the tubular fabric and the nonwoven fabric converge. Provide a means for maintaining the original shape.

A conventional lining material, particularly a lining material using a tubular woven fabric or a non-woven fabric described in Japanese Patent Application No. 58-102361, is suitable as an adhesive. When impregnating a tubular cloth with a xylene resin through a non-woven cloth, the non-woven cloth layer functions as a filter, and the adhesive cannot be sufficiently impregnated up to the tubular woven cloth. . In the case of an excimer resin, since it contains a resin component and a filler, a phenomenon occurs in which the filler is filtered by the nonwoven cloth when passing through the nonwoven cloth, and it is necessary to overcome this drawback. was there. According to the present invention, the non-woven cloth has a large number of pores distributed almost uniformly, so that such separation of the components of the adhesive can be prevented.

In the lining material of the present invention, the adhesive-impregnated tubular woven fabric is composed of a single-layer nonwoven fabric or a laminated nonwoven fabric, and its outer diameter is airtight. The inner diameter of the airtight tubular cloth is inserted by an appropriate means in a state of being folded in the length direction, which is larger than the inner diameter of the tubular cloth. In addition, at least the nonwoven fabric used as the tubular woven fabric for impregnating the adhesive has a nonwoven fabric that forms the innermost layer of the nonwoven fabric, and the nonwoven fabric has a strip shape, and both sides in the length direction can be measured. It's a sewing method !? The feature is that it is sewn so that it does not fit and is formed in a tubular shape. This nonwoven fabric is generally formed of synthetic fibers, and the material is It is possible to use Polyamide, Polyester, Acrylic, and Polyurethane. It is particularly preferable to use those manufactured by a conventional method, for example, a dry-sumbon method from the knowledge of the Riestel. Also, is this non-woven cloth 2 to 8 d single? It is desirable that the fabric be insensitive fabric of a riester weft. The thickness of the non-woven fabric can be changed depending on the purpose of use, etc., and is particularly limited.However, the thickness is usually 2 to 8, and the non-woven fabric is subjected to hunting or the like. If the hole to be made has the aforementioned thickness, 2 to 8 mm? 5, the hole distribution is preferably such that the shortest distance between the holes is 15 to 60 dragons.

On the other hand, if the airtight tubular woven fabric is lined up, it is the one made of the synthetic fiber described in U.S. Pat. No. 4,334,948 or 4,368,091]. The outer surface of a tubular woven fabric woven into a tubular shape using weft and weft has a synthetic resin film. Polyamide as synthetic fiber, 10? Riestell, Acryl, and Reurethane types can be used, but the use of Boliester type is preferred because of its high strength. . As the tubular cloth, a non-extensible entangled long fiber yarn of a polyester fiber, or the non-extensible entangled long fiber yarn and a ^ ester long iron fiber yarn, a Alternatively, it is preferable to use a mixed short yarn of a polyester short fiber yarn for at least one of the warp and the weft.

As the synthetic resin used for the synthetic resin film, it is preferable to use a polyester elastomer in consideration of strength, durability, and compatibility with the pig cloth.

The adhesive used to impregnate the tubular woven fabric is d Xylic adhesives are preferred, and aromatic or aliphatic ^ liamin is preferably used as the curing agent.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a partially broken perspective view showing a typical ^ of the lining material of the present invention! FIG. 2 is a perspective view showing the tubular cloth for adhesive impregnation in FIG. 1, and FIG. 3 is a perspective view showing a form in which the tubular cloth for adhesive impregnation is extended in the circumferential direction. ? FIG. 4 is a plan view showing a cross section of a pipeline to which the lining D material of the present invention is applied.

BEST MODE FOR CARRYING OUT THE INVENTION

Next, the present invention will be described in more detail with reference to the accompanying drawings. Fig. 1 shows the pipe lining according to the present invention! ) Typical aspects of the material

The material 1 is shown in a cutaway perspective view. The material 1 is made up of an airtight tubular woven fabric 2 and a nonwoven fabric 6 made of a tubular woven fabric 4 having a synthetic resin film 3 on its outer surface. The tubular woven fabric 5 for adhesive impregnation formed into a tubular shape by sewing with a thread 7 in the longitudinal direction 1, and the tubular woven fabric 5 is inserted into the tubular pig cloth 2. The outer diameter of tubular woven fabric 5 is the inner diameter of tubular woven fabric 2! ? Because of its large size, it is folded at the fold 8 in the length direction, and the non-woven fabric 6 has a large number of substantially uniformly distributed through holes 9. ¾: The tubular woven fabric 4 of the tubular woven fabric 2 is formed into a tubular shape by the warp a and the weft ¾ of synthetic fibers.

FIG. 2 is a perspective view showing only the tubular woven fabric 5 in FIG. 1]. However, both ends 10 in the longitudinal direction of the non-woven fabric 6 are sewn together by a thread 7 to each other. This is shown in Figure 2. In the folded state, the tubular woven fabric 5 has a shape folded at the fold line 8, so that the both ends 10 are tightened by the thread 7 to form a projection. FIG. 3 is a perspective view of the tubular fabric 5 when used for the liner of a pipeline] 9. In this case, the fold 8 disappears because the tubular woven fabric 5 is stretched in the circumferential direction. As a result, the cross section is circular, and the projections at both ends 1.0 disappear at that time.

Hereinafter, the composition of the lining material of the present invention will be described more specifically by way of example. In this kiln, the lining material of the present invention is applied to a sewage hume pipe having an inner diameter of 300. The tubular woven fabric 4 is formed by weaving a warp a and a weft into a tubular shape, and the warp a in this case has a d of 1,000 d (the number of filaments is 288). Twisted 6 non-extensible entangled yarns of Riester filament yarn are used, and 320 of them are aligned and used (total of 640 yarns). Next, eighteen non-stretchable entangled long fiber yarns of 1,000 deniers are twisted, and 35 yarns are woven between 10 cm and woven so that the folding width is about 490 TO. This is heat-treated and shrunk to a folding width of about 445 _OT . At this time, the thickness of the tubular woven fabric 4 is about 1.8 thighs, the tensile strength in the longitudinal direction is about l CTi width, which is about 210, and the pressure resistance is about 8

Met.

Tubular: An air-tight synthetic resin film 3 is formed on the outer surface of the fabric 4, and this film 3 is generally formed by extruding a colorless polyester resin by an extrusion molding method. J? The outer surface of the tubular woven fabric 4 It is formed by coating directly on the surface. Its thickness is about 0.6 TO] ?, Generally, a thickness of about 0.2 to 1.5 ounces is appropriate. In this way, the airtight tubular fabric 2 is formed. The tubular woven fabric 4 is further shrunk by the treatment by the extruder to form the film 3, and the airtight tubular fabric 2 after the film 3 is formed has a folding width of 40 thighs. there were.

The through-hole 9 is formed by a perforation process in the stage before the tubular fabric 5 for impregnating the adhesive is sewn into a tube. 'The diameter of the through hole 9 at this time is about 3.5 mm, and the shortest distance between the through holes is about 2.5 cm from the center of the through hole. This perforation is performed by completely cutting the fibers of non-woven fabric 6 with a conventional etching machine. The nonwoven fabric 6 used at this time was formed to a thickness of about 4 by a conventional method in which a single-filament monofilament of about 5 denier; The basis weight of this non-woven fabric was about 4209-Zm ² . This non-woven fabric is covered with an over-lock type sewing machine so that the lengthwise ends of the non-woven fabric are not overlapped. To form an adhesive-impregnated tubular woven fabric 5. In this overlock, one-lock sewing, two nonwoven fabrics each having a predetermined width are overlapped, the ends are sewn with a sewing width of about 10 mm, and the 詧 -shaped cloth 5 is stretched in the circumferential direction. In this case, both ends are joined and do not overlap each other. Fold this tubular real cloth! ) The width was about 460 mm. This tubular cloth 5 is then inserted inside the tubular cloth 2 by an appropriate method. The lining material 1 in this state is j? As shown in Fig. 1.

Next, apply this lining material 1 to the inner surface of the fume pipe. The method will be described.

First, apply an epoxy adhesive to the inner surface of the lining material 1. To apply the adhesive to the lining material 1, evacuate the inside of the lining material 9 and apply the adhesive to the lining material 1. The lining material is injected, and the lining material is passed between the nip α-lines, and the adhesive is squeezed to evenly spread the entire length of the lining material 1. As the adhesive, it is preferable to use the above-mentioned aromatic ^ liamine as a curing agent. More specifically, in this example, the main agent is eh. Screw-type eho? Quin-based resin, the curing agent is a modified aromatic polyamine, and the mixed viscosity is 5,000 cps (B type reclaiming viscometer according to paragraphs 6 and 3 of JI SK 6833). Measured at). Calcium carbonate was used as the filler. This adhesive was applied to the inner surface of the lining material in an amount of about 6 / m ² . Lining with glue applied! The material is then inserted into the pipeline by turning it upside down at fluid pressure by a suitable method known in the art, for example, the reversing lining method described in US Pat. No. 4,334,943. Then, the adhesive is cured by heating with steam or the like. In this case, the pressure required for turning over was 0.8 / en in this example. In this way, the lining 1 was applied to the inner surface of the fume pipe.

Fig. 4 is lining like this! The cross section of the fume line is shown. An adhesive layer 11 is provided on the inner surface of the fume tube 10, and a tubular woven fabric 5 and a tubular woven fabric 2 integrally bonded to the adhesive are located thereon. At this time, the synthetic resin film forms the innermost layer of the lining material. The lining material of the present invention] 5 material has a tubular woven fabric and has sufficient strength in the longitudinal direction, so that it exhibits seismic isolation. In the seismic isolation test, a 300-millimeter hume pipe of 1 m length was simply joined together, and the specimen with the lining material attached was used as a test specimen.A tensile load was applied to both ends of the specimen. At the time of loading, the liner was about 9 ton], and the 9 pieces came off the hume tube. When the opening of both pipe ends was 70 dragons, the tensile load was 10.5 ton. In addition, cracks occurred in the hume tube in the direction. The inner lining that peeled off from the tube was not damaged and formed a hard eve. Therefore, even if the pipeline is damaged due to an earthquake or the like, the pipes and the lining will be conical, and the lining will be stretched slightly, thereby absorbing energy. The inner lining material alone can sufficiently secure a fluid passage without breaking the lining material.

It is basically the strength in the vertical direction of the tubular woven fabric that bears the force that pushes the lining material from the pipe as stress, and judging from the results of this experiment, the vertical direction If the tensile strength is more than 1 ^ ¾120, the lining j5 will not be damaged. And if you try to get strength in this vertical direction, it can be said that things other than woven cloth are difficult.

In the lining material of the present invention, since the through-holes are uniformly distributed in the pipe 5 and the cloth 5 is provided in a large number, not only the cloth and the non-woven cloth with the adhesive, but also the pipe through these holes.弒 Fabric 2 is also impregnated with a large amount of adhesive. In addition, the presence of this through hole eliminates the above-mentioned filtration phenomenon of the immortalized cloth, and the adhesive component is homogeneously tubular. It has the advantage of being supplied to cloth 2. Accordingly, when the tubular woven fabric 2 and the tubular woven fabric 5 are hardened after being applied to the pipe, they can be integrally bonded to each other to form a thick layer. In this way, there is a through hole.]? A thick fibrous layer is impregnated with a large amount of adhesive, and a rigid pipe is lined with the lining material lined in the pipe line. It can be formed in the entanglement and the lining material will be crushed even if there is already a hole in the pipeline or if there is a new hole and groundwater has entered. As a result, the above-mentioned external water E shape retention can be secured. In order to have a sufficient thickness, when the tubular cloth 5 is used as a single layer, the thickness force is preferably s 2 to 8 m. If the thickness is smaller than 2 females, it is not sufficient to secure the thickness, and if it is larger than 8, the tubular woven fabric 5 is not uniformly impregnated with the adhesive. In addition, the non-fiber fabric is formed by dry-bonding using a 2 to 8 denier '''reestar fibrous weft thread as the tubular cloth 5. It is suitable because of its excellent impregnation and strength. To form the through-holes, it is necessary to use the Thomson's multi-machine method. 1) Cutting the fiber completely and opening it will reduce the permeability and impregnation of the adhesive. It is preferred because it is excellent.

It is preferable that the through holes have a size of about 2 to 8 丽 ø, and the shortest distance between the through holes is about 1.5 to 6 OTI, so that the holes are formed uniformly over the entire surface. If the through-holes are too small] or too large, the effect of impregnating the tubular woven fabric 2 with the adhesive is small. Also, if the perforations are too large or too small, the strength of the lining material may be reduced. By providing additional holes? On the other hand, the peel strength between the tubular woven fabric and the tubular non-iron fabric is increased, and the integration of the tubular cut fabric and the tubular nonwoven fabric is promoted. When the present inventor examined the close contact cone strength (180 °) between the tubular woven fabric 2 and the tubular fabric 5 for the nonwoven fabric having the through hole and the through hole, the through hole was determined. Those with porosity were 6-7 ¾r / COT, while those without porosity were 3-4 K / cm.

In addition, when the diameter of the pipeline is large, or when there is a risk of receiving a large external water pressure, the layer thickness of the non-woven fabric should be increased. Since the real world increases in order to increase the number of layers, it is preferable to make the nonwoven fabric double or triple multilayer.

Also in this case, it is needless to say that the thickness of each nonwoven fabric layer is set to 2 to 8 baskets, and a through hole is formed in each layer. Furthermore, because of the perforations, the impregnation of the non-woven fabric with the adhesive is sufficient.

In the above embodiment, the folded width of the airtight tubular woven fabric is

At 440 cafe (about 280 thighs in outer diameter? 5), the inner width of the tubular woven fabric for impregnating the adhesive is 60 plates (293 fiber in outer diameter, and air pressure is 0.5 / c after reversal) ^{Since the} outer diameter reaches approximately 300 mm 5 at about ^z , both the airtight tubular woven fabric and the tubular damp fabric for impregnating the adhesive can be lined without any gaps. The reason why the expandability is good is that the first fold width of the airtight tubular woven fabric is 490 m (approximately Λ2 plates Φ) in which the heat treatment is performed.]? The inner diameter of the pipe is increased by force. ?? This is because the diameter of the tubular woven fabric is air-tight and the diameter of the fabric is also large. Furthermore, the diameter of the tubular cloth for the adhesive impregnation is larger than the diameter of the airtight tubular cloth. It is very flexible and keeps the lining material upside down! The fluid pressure of the festival can be kept low. In addition, when the tubular insulated cloth is formed in multiple layers to secure the thickness, it is possible to sew only the innermost layer to cause heavy damage to the intermediate layer. If the innermost layer is sewn, it is preferable because the nonwoven fabric will be displaced when the lining material is re-tilled, which may cause the generation of seams. In addition, when the tubular non-pigmented cloth forms a multilayer, the diameter of the non-woven cloth layer is larger than the diameter of the airtight tubular woven cloth, and the larger the diameter of the non-woven cloth is located in the inner layer. This is desirable because the lining material can easily be turned over. However, it is necessary to keep them all slightly smaller than the pipe diameter.

Further, by using the non-stretchable entangled long-weft yarn for the tubular woven fabric, the separation strength between the outer surface of the synthetic resin film and the tubular woven fabric can be improved. In the above-mentioned ^, although non-extensible entangled long fiber yarn is used for all of the 絰 yarn and the weft yarn, the adhesion separation strength (180 degree separation) between the tubular fabric and the synthetic resin film is about] It is 0 cm, which is about 5 to 10 mm in strength compared to the case of using a steel wire of all lengths of about 1 to 2 Zcm. For this reason, even if external water pressure is applied from the outside, that is, from the side of the tubular woven fabric, the film is less likely to be grown. This phenomenon is due to the fact that the non-extensible entangled long fiber yarn is bulky. As a result, the resin forming the film penetrates into the non-extensible entangled long weft thread to achieve an anchor fruit, and the thread escapes because it is a long iron weft thread. However, it is considered that the separation strength * is improved.

Here, the non-extensible entangled long fiber yarn does not need to be used for both the warp yarn and the long yarn, but the non-extensible entangled long fiber yarn and the ordinary long fiber yarn or short fiber yarn are used. The effect can be exhibited even if it is mixed and twisted.

The non-extensible entangled filaments are crimped under wet heat such as steam, whereas ordinary wool-yarns are crimped under dry heat. The thread in the rolled state is fixed at a high temperature to reduce elongation. Therefore, it is a yarn with a shape very similar to a regular wool yarn, but has an elongation of 20% or less and high strength. It is desirable to use vestile fibers for the displacement of woven cloth and non-woven cloth in terms of strength. Polyester is also excellent in chemical resistance and abrasion resistance, and is desirable because durability is added. Similarly, synthetic resin skin! It is desirable that the resin to be used enormously is a エテ、弾性弾性弾性樹脂弾性樹脂、、、、、薬品. If the coating is used without coloring, the resin itself will be transparent, so it will be necessary to check from the outside whether the adhesive has passed through the non-woven cloth and impregnated into the mesh of the tubular woven cloth. This is advantageous because it allows observation.

Industrial use

The lining material of the present invention is soft because it has excellent seismic isolation and water pressure retention in addition to the characteristics of the conventional lining forest. 特に Suitable for reinforcing pipes buried in land or landfills. Also gas pipelines and oil c. It can be used to reinforce various pipelines such as electric lines, water pipes, sewage pipes, and underground power cables.

Claims

The scope of the claims

1. Insert a tubular lining material with an adhesive applied to the inner surface into the pipeline, advance it inside the pipeline while turning it over with fluid pressure, and crimp the inverted lining material to the inner surface of the pipeline However, the above-mentioned lining material used in the method described above, which is used in the method described above, which is interposed between the lining material and the pipe line, and which is adhered to the inner surface of the pipe line with an adhesive P) It is made of an airtight tubular woven fabric woven into a tubular shape with a synthetic resin film formed on the outer surface, and a nonwoven fabric with a through hole formed by punching almost uniformly inside it. A pipe liner characterized by comprising a tubular cloth for adhesive impregnation.

2. The adhesive impregnated tubular woven fabric has an outer diameter larger than the inner diameter of the airtight tubular pig cloth, and is inserted inside the airtight tubular cloth in a state of being folded in the longitudinal direction. A lining material for a pipeline according to claim 1.

3. The liner according to claim 2, wherein the adhesive-impregnated tubular cloth is constituted by a single-layer non-woven cloth or a laminated non-woven cloth. .

4. At least the non-woven cloth constituting the innermost layer is a long strip of non-woven cloth, and both sides in the longitudinal direction of the non-woven cloth are stitched.]) 4. The pipe liner according to claim 3, which is sewn so as not to overlap and is formed in a tubular shape.

5. The non-woven fabric is made of 2 to 8 balls The lining material for a pipeline according to claim 4, wherein the lining material is a dry spunbond nonwoven fabric.

6. The non-woven fabric has a thickness of 2 to 8 mm, and the through holes formed in it have a diameter of 2 to 8 pairs, and the shortest distance between the through holes is 15 to 60 pairs. The pipe liner according to paragraph 5 of the patent request, which is formed at intervals.

7. The pipe liner according to claim 1, wherein the airtight tubular woven fabric is made of a synthetic resin film made of a polyester elastic resin.

8. The air-tight tubular woven fabric is made of a non-stretchable entangled long fiber of Boliester braid, or a non-stretchable entangled long fiber of Boliester braid 7. The pipe line according to claim 7, wherein a long-twisted yarn of a long-benth weft or a staple short fiber yarn is used for at least one of a warp and a weft. Lining j?