JP2003039553A - Pipe lining technique using pipe lining material including pipe lining photopolymerizable resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method by which a pipe-like pipe lining material obtained by impregnating a fiber-reinforcing material or the like with a photopolymerizable resin composition can be safely and rapidly cured and thereby a lined pipe can be formed with ease in a ductwork intended for repairing. SOLUTION: A pipe-like pipe lining material composed of a material impregnated with (a) a photopolymerizable initiator having light sensitivity in a visible light region, (b) a resin having a vinyl group and (c) a polymerizable monomer as essential components, is inserted into the ductwork. Next, the impregnated photopolymerizable resin composition is cured by the energy emitted from a radiation energy source while the pipe lining material is pressed against the inside wall face of the ductwork by a liquid-like fluid pressure and thus the line pipe is formed inside the ductwork.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a pipe lining method for a pipe lining material containing a photopolymerizable resin composition.

[0002]

2. Description of the Related Art In recent years, for pipes mainly buried in the ground such as gas pipes, water pipes and sewer pipes, for the purpose of reinforcing the strength of existing pipes, anticorrosion measures, leakage / inundation measures or flow rate improvement, Reversing the inner pipe lining material with the liquid curable resin composition impregnated inside the existing pipe by fluid pressure etc.
A pipe repair method typified by an inversion pipe lining method in which a pipe lining material that has been advanced and is reversed is pressure-bonded to the inner surface of the existing pipe by fluid pressure to cure the curable resin composition to form a synthetic resin pipe on the inner surface of the existing pipe. Is in the limelight.

The outline of this inversion tube lining method will be described step by step. First, a tubular body having a flexible film layer on the outer side that matches the entire length of the inner diameter of an existing tube and having a fiber reinforcing material on the inner side is prepared. . Next, the inside of the tubular body is depressurized for the purpose of facilitating uniform impregnation of the fiber reinforcing material with a curable resin composition mainly composed of a liquid curable resin and a curing agent, and optionally a curing accelerator. Air is eliminated, and the curable resin composition is gradually impregnated from one end of the tubular body over the entire length of the tubular body to obtain a pipe lining material. Next, this pipe lining material is conveyed to the insertion port of the existing pipe while maintaining the frozen state or the refrigerated state, and is inverted while closely contacting the existing pipe with fluid pressure such as air and water pressure, and then hot air, hot steam, Curing is performed by using hot water or the like while closely contacting the existing pipe. Finally, cut the excess pipe lining material at the installed cutting edge pipe lining material stop portion and insertion portion, and join the lined pipe to complete the process.

In the pipe line repairing method typified by this inversion tube lining method, after the pipe lining material is impregnated, a hardening agent and a hardening accelerator used as necessary before the tube lining material is installed at a fixed position. In order to prevent the curable resin composition containing the agent from prematurely curing, the storable period of the pipe lining material is extended as much as possible, while the construction period is shortened as much as possible. A fast curing property is desired. However, actually, the pot life of the curable resin composition containing the curing agent and the curing accelerator used as required is short, and the storage time of the pipe lining material is also short. Furthermore, since a large amount of heat medium and a large amount of heat are required for curing, there is a problem that it takes time to heat.

Particularly, as a measure for shortening the construction period by shortening the curing time, the curing method by ultraviolet irradiation is drawing attention because of its advantages such as high productivity, low pollution, and low influence of heat on the material. For the purpose of ameliorating the problems with the methods called “INS method (in situ form method)” and “HL method (hose lining method)” in which a repair material using a thermosetting resin is cured by heat, for example, The methods described in Japanese Patent Laid-Open No. 4-56738 and Japanese Patent Laid-Open No. 6-28904 are mentioned. JP-A-4-56
According to Japanese Patent No. 738, a hose made of a resin that is cured by ultraviolet rays or infrared rays is introduced into a conduit to be repaired in an uncured state, and then air is introduced into the hose to expand the hose, whereby the inner wall of the conduit is expanded. In this state, the curing mechanism is introduced into the hose and radiation is applied to cure the hose. Further, the mechanism for hardening the hose is configured by mounting an ultraviolet lamp, an infrared lamp, or an infrared heater on a carriage-shaped member that can move in the pipeline.

On the other hand, in JP-A-6-28904,
There is provided a lining method in which an ultraviolet curable tube reversely inserted with high-pressure air is pressed against a wall surface as it is, and ultraviolet rays are irradiated while moving the ultraviolet irradiation device in the tube to cure the tube. However, these methods have a problem that a curing device equipped with an ultraviolet lamp is moved inside the pipeline, so that the inside of the pipeline becomes hot and a large amount of air needs to be circulated for cooling. . In the past, in Europe, the coating material that protects hoses and tubes melted due to abnormal temperature inside the pipeline, and the polymerizable monomer that filled the inside of the hoses and tubes from the melted part ignited and exploded due to the heat of the ultraviolet lamp. It has been reported that by injecting air into the inside of a hose or tube to expand it, it is brought into close contact with the inner wall of the pipeline, and operating a curing device such as an ultraviolet irradiation device inside this is the curing time. Although it is possible to shorten the construction period by shortening it, "INS construction method" and "H
It is considered more dangerous than the L construction method.

Further, in Japanese Unexamined Patent Publication No. 8-1779, "Curing apparatus for photocurable tube and method for repairing pipeline using the curing apparatus", a heat source such as an ultraviolet lamp is arranged outside the pipeline. As a method for suppressing the temperature in the pipe line, facilitating the detection of an accident such as a lamp burnout, and coping with the repair of a small-diameter pipe, the above-mentioned JP-A-4-567.
There is provided a method for improving the technique disclosed in Japanese Patent Laid-Open No. 38 or No. 6-28904. However, this method does not provide a drastic solution.

Next, Japanese Patent Laid-Open No. 6-15736, "Method, Device and Repairing Material for Repairing Pipeline" can be mentioned. This uses a sheet-shaped lining material impregnated with a liquid ultraviolet curable resin as a partial repair material for the pipeline, so an ultraviolet irradiation device is required, and the ultraviolet irradiation lamp is installed inside the pipeline running repair device. ing. The UV irradiation lamp is required to have a high output, and since it is heated to a high temperature by the UV irradiation of the UV irradiation lamp, there is a problem that the cellophane bag used for crimping the repair material to the inner wall of the pipe is easily flammable and burned. In addition, since a high-power ultraviolet irradiation lamp as an ultraviolet irradiation device is installed inside the central portion of the pipeline traveling repair device, it is not possible to form an axial through passage for water passage in the pipeline traveling repair device. It is possible. Therefore, there is a problem that it is necessary to shut off the water flow in the work of coating the resin on the inner surface of the pipeline. Further, since the ultraviolet ray has a poor light-transmitting property for the lining material, the photo-curing on the outer surface side of the lining material facing the inner surface of the conduit is insufficient, and in order to stick the lining material of a desired thickness to the inner surface of the conduit. However, there is a problem that the outer surface of the lining material (the inner surface of the conduit) is poorly cured and the strength of the cured product is reduced.

Further, in Japanese Patent Laid-Open No. 11-230476, it is characterized in that a visible light curing repair material which is pressure-bonded to the inner wall of the conduit of the portion to be repaired by using pressurized air is cured by visible light. A visible light curing type pipe inner surface repair method has been proposed. In this method, a water passage is provided in the repair tool for the inner wall of the pipe, and the inner surface of the pipe can be repaired while the water is flowing before and after the repair tool for the inner wall of the conduit. Not only there are restrictions, but also the above-mentioned JP-A-6-15.
It is intended only to improve the problems of Japanese Patent No. 736.

On the other hand, in Japanese Unexamined Patent Publication (Kokai) No. 8-323860, a cationic dye compound sensitive to near infrared light and an organic compound are used for the purpose of preventing defective curing of the lining material due to insufficient transmission of ultraviolet rays and ensuring a desired lining material thickness. Boron salt compound,
And a method of coating the inner surface of a tubular molded body, which uses a compound sensitive to ultraviolet rays to visible light in combination. Also in this method, air is used to expand the tubular body whose end is closed. Furthermore, there are problems not only in storage stability but also in the curability of the deep part and the curing speed.

Further, in Japanese Patent Application Laid-Open No. 11-210981, photocurability is improved by improving the storage stability and being curable by light having a long wavelength having transparency so that the coating thickness can be freely set without using a heat source. A tubular molding obtained by using a resin composition containing an unsaturated polyester resin and / or a vinyl ester resin and a bisacylphosphine oxide compound having a specific chemical structure as essential components, and impregnating this with a fiber layered body. It is an object of the present invention to provide a photocurable material for repairing a coating material or a partial coating on the inner surface of a body. However, compressed air is used to expand the coating material provided in this method as well. Further, it is difficult to apply the method to a pipeline repairing method represented by an inversion tube lining method in which a tubular lining material is covered over the entire length of the pipeline to be repaired.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to use a tubular pipe lining material obtained by impregnating a fiber layer with a photopolymerizable resin composition to complete curing safely and promptly. It is an object of the present invention to provide a method capable of easily forming an lining pipe in a pipe line to be repaired.

Another object of the present invention is to provide a method for easily inserting a pipe lining material into a pipe line in the pipe lining method. Another object of the present invention is, in the above-mentioned pipe lining method, when inserting the pipe lining material into the pipe, supply a liquid fluid inside the tubular pipe lining material and invert the pipe lining material while inverting the pipe lining material. The purpose is to provide a method for inserting and moving. Another object of the present invention is to be able to complete curing safely and quickly,
It is an object of the present invention to provide a method capable of easily forming a lining pipe over the entire length of a pipe line to be repaired.
Another object of the present invention is to provide a method of completing the curing more quickly in the above-mentioned pipe lining method.

[0014]

The present invention comprises a photopolymerizable initiator (a) having photosensitivity in the visible light region, a resin (b) having a vinyl group and a polymerizable monomer (c) as essential components. A tubular pipe lining material made of a material impregnated with a photopolymerizable resin composition is inserted into the pipe, and the pipe lining material is pressed against the inner wall surface of the pipe by a liquid fluid pressure,
The pipe lining construction method is characterized in that the impregnated photopolymerizable resin composition is cured by energy emitted from a radiant energy source to form an inner pipe inside the pipe.

In the pipe lining method described above, the present invention is characterized in that when the pipe lining material is inserted into the pipe line,
The present invention relates to a pipe lining construction method in which a pipe lining material is pulled to move in a pipe line and a liquid fluid pressure presses the pipe lining material against an inner wall surface of the pipe line.

In the pipe lining method described above, the present invention is characterized in that when the pipe lining material is inserted into the pipe line,
The present invention relates to a pipe lining method in which a liquid fluid is supplied to the inside of a tubular pipe lining material, the pipe lining material is inverted and inserted into and moved into a pipe line, and the pipe lining material is directly pressed against an inner wall surface of the pipe line.

In the present invention, the photopolymerizable resin composition impregnated into the pipe lining material pressed against the inner wall surface of the pipe by the liquid fluid pressure by the energy emitted from the radiant energy source is spread over the entire length of the pipe. The above-mentioned pipe lining method of curing to form an inner pipe inside the pipe passage. The above-mentioned pipe lining method.

The present invention also relates to the above-mentioned pipe lining method, wherein the energy emitted from the radiant energy source has a wavelength in the range of curing the photopolymerizable resin composition containing the pipe lining material.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION First, the photopolymerizable initiator (a) having photosensitivity in the visible light region, which is used in the photopolymerizable resin composition of the present invention, will be described. In the present invention, visible light means light rays in the wavelength range of 380 to 700 nm. Camphorquinone as a photopolymerizable initiator (a),
Benzyl, diacetyl, acetylbenzoyl, α-naphthyl, p, p′-dimethoxybenzyl, 2,3-pentadione, 1,2-phenanthrenequinone, 3,4-phenanthrenequinone, 1,4-phenanthrenequinone,
3,4-phenanthrenequinone, 9,10-phenanthrenequinone, naphthoquinone, trimethylbenzoyldiphenylphosphine oxide, methyloxanthone,
Known visible light polymerization initiators such as 10-butyl-2-chloroacridone and dicyclopentadienyltitanium-di (pentafluorophenyl) may be used, and these may be used alone or in combination of two or more.

Furthermore, known bis (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide, bis (2,4,6-trimethylbenzoyl) -methylphosphine oxide, 2,4,4. 6
Examples include acylphosphine oxide compounds such as -trimethylbenzoyl-diphenylphosphine oxide. As a commercial product, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (BA
Lucirin TPO manufactured by SF), bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide (Ciba Specialty-Irgacure 81 manufactured by Chemicals)
9), 2-hydroxy-2-methyl-1-phenylpropan-1-one and bis (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide are mixed at a weight ratio of 75/25. Ciba Specialty-Chemicals Irgacure 1700, 1-
Hydroxy-cyclohexyl-phenyl ketone and bis (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide in a weight ratio of 75
/ 25 mixed Ciba Specialty Chemicals Irgacure 1800, 1-hydroxy-cyclohexyl-phenyl ketone and bis (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide in a weight ratio of 50. Ciba Specialty-Irgacure 1850 manufactured by Chemicals, Inc.
2-hydroxy-2-methyl-1-phenylpropane-
Two or more kinds of Darocur 4265 in which 1-one and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide are mixed at a weight ratio of 50/50 can be used in combination. Further, known composite polymerization initiators shown below may also be used. Examples of the composite polymerization initiator include organic peroxide / dye system, diphenyliodonium salt / dye, imidazole / keto compound, hexaarylbiimidazole compound / hydrogen donating compound, mercaptobenzothiazole / thiopyrylium salt, metal arene /
Examples include cyanine dyes, hexaarylbiimidazole / radical generators, and the like. These may be used alone or in combination of two or more.

The amount of the photopolymerization initiator (a) used is such that the total amount of the vinyl group-containing resin (b) and the polymerizable monomer (c) is 100.
0.3 to 5 parts by weight is preferable, and 0.5 to 0.5 parts by weight.
-3 parts by weight is more preferable. If the amount used is too small, sufficient photocurability cannot be obtained, and if the amount used is more than the above range, the cost will increase, and the decrease in light transmittance due to coloring will increase, resulting in a decrease in the strength of the cured product. Not only becomes large, but also tends to cause poor curing.

Next, the resin (b) having a vinyl group used in the photopolymerizable resin composition of the present invention is preferably an unsaturated polyester resin and / or a vinyl ester resin.

The unsaturated polyester resin is a condensation reaction of an α, β-ethylenically unsaturated dibasic acid and, if necessary, a saturated dibasic acid other than α, β-ethylenically unsaturated dibasic acid with a polyhydric alcohol. Can be obtained. Examples of the α, β-ethylenically unsaturated dibasic acid include maleic acid, fumaric acid, chloromaleic acid and the like, and maleic acid or fumaric acid is preferably used as an essential component. These can use the acid anhydride. The α, β-ethylenically unsaturated dibasic acid is preferably used in the range of 0.3 to 1.0 mol in 1 mol of the basic acid. Saturated dibasic acids other than α, β-ethylenically unsaturated dibasic acids include isophthalic acid, phthalic acid, phthalic anhydride, terephthalic acid, nitrophthalic acid,
Tetrahydrophthalic anhydride, endomethylenetetrahydrophthalic anhydride, halogenated phthalic anhydride, oxalic acid,
There are malonic acid, succinic acid, adipic acid, sebacic acid, etc., and these acid anhydrides may be used, but the pipe lining method is used for the purpose of reinforcing the strength of existing pipes, anticorrosion measures, water leakage / water infiltration etc. Therefore, it is preferable to use isophthalic acid as an essential component.

As the polyhydric alcohol, ethylene glycol, diethylene glycol, propylene glycol,
Dipropylene glycol, 1,3-butanediol,
1,4-butanediol, 1,6-hexanediol,
Examples include neopentyl glycol, trimethylolpropane, hydrogenated bisphenol A, and alkylene oxide adducts of bisphenol A. Since the pipe lining method is intended to reinforce the strength of existing pipes, prevent corrosion, and prevent water leakage and water infiltration, it is preferable to use neopentyl glycol as an essential component. Polyhydric alcohol is basic acid component 1
It is desirable to use it in the range of 1.0 to 1.2 mol per mol.

The unsaturated polyester resin has a weight average molecular weight (determined by gel permeation chromatography in terms of standard polystyrene, the same applies hereinafter) of 8,000 to
It is preferably in the range of 50,000, and preferably 10.0
More preferably, it is in the range of 0-45,000. The acid value is preferably in the range of 5-40 KOHmg / g, more preferably 7-35 KOHmg / g.

This unsaturated polyester resin is preferably used by dissolving it in the polymerizable monomer (c). As the polymerizable monomer (c), styrene, vinyltoluene, α
-Aromatic vinyl monomers such as methylstyrene, chlorostyrene, dichlorostyrene, divinylbenzene and t-butylstyrene, methacrylic acid alkyl esters such as methyl methacrylate, ethyl methacrylate and butyl methacrylate, methyl acrylate, Acrylic acid alkyl esters such as ethyl acrylate and butyl acrylate, neopentyl glycol dimethacrylate, pentaerythritol tetramethacrylate, dipentaerythritol pentamethacrylate, methacrylic acid esters of polyhydric alcohols such as dipentaerythritol hexamethacrylate, neopentyl glycol dimethacrylate Acrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, etc. Methacrylic acid esters of polyhydric alcohols, diallyl phthalate, triallyl cyanurate, but and acrylonitrile, to use easy styrene available at low cost are common.

The vinyl ester resin is obtained by reacting an epoxy compound with an unsaturated monobasic acid. As the epoxy compound, for example, commercially available Epicoat 82
8, 1001, 152, 154 (all above are manufactured by Yuka Shell Epoxy Co., Ltd., trade name), Araldite AER
280, 6071 (all manufactured by Asahi Ciba, trade name), Epiclon 850, 860, 1050 (both manufactured by Dainippon Ink and Chemicals, trade name), Epomic R-140, 301 (both manufactured, either Also, Mitsui Petrochemical Co., Ltd. product name), DEN-431, 438, 439 (all of which are Dow Chemical Co. product name) can be used. As the unsaturated monobasic acid, acrylic acid,
Methacrylic acid is a typical example, and acrylic acid ester and methacrylic acid ester are other examples. It is preferable that the carboxyl group of the unsaturated monobasic acid is blended in the range of 0.9 to 1.2 mol with respect to 1 mol of the epoxy group of the epoxy compound.

The weight average molecular weight of the vinyl ester resin is preferably in the range of 500 to 5,000, more preferably in the range of 800 to 4,000. The acid value is preferably within the range of 0.1-40 KOHmg / g, more preferably within the range of 5-20KOHmg / g.

Like the unsaturated polyester resin, this vinyl ester resin is also preferably used by dissolving it in the polymerizable monomer (c). As the polymerizable monomer (c), those described above can be used.

In the present invention, the photopolymerizable resin composition is
For example, it is used as a tubular pipe lining material by impregnating a tubular body having a fiber reinforcement. Polyester fibers are most commonly used as the fiber reinforcing material, but acrylic fiber, vinylon fiber, carbon fiber, polyamide fiber, glass fiber or other fiber felt, cloth, non-woven fabric, mat, or the like can be used. The type and amount of these used can be selected according to the required characteristics and the like, but those having a small coloring property are preferable due to the problem of curability. The amount of these used is preferably 5 to 100 parts by weight with respect to the photopolymerizable resin composition.

In the present invention, the photopolymerizable resin composition contains a curing retarder for controlling the curing time, a thixotropic agent, a filler, a thickener, etc., if necessary, such as molding conditions and required properties. Can be added for use. Examples of the curing retarder include hydroquinone, 2,6-di-t-butyl-4-methylphenol, methylhydroquinone, and the like, and include vinyl group-containing resin (b) and polymerizable monomer (c). The amount is preferably 0.1 part by weight or less, and when used, 0.001 part by weight or more is preferably used.

As the thixotropic agent, for example, a known thixotropic agent such as silicon dioxide powder (aerosil), mica powder or calcium carbonate powder may be used as the vinyl group-containing resin (b) and the polymerizable monomer (c). It is preferable to use 0.1 to 20 parts by weight with respect to 100 parts by weight as the total amount.

Examples of the filler include calcium carbonate, clay, aluminum powder, talc, silica powder, glass powder, glass beads, mica and aluminum hydroxide. These can be used alone or in combination, and the type, the amount used, etc. can be appropriately selected according to the molding conditions and the required characteristics of the molded product. In the pipe lining method, aluminum hydroxide is generally used for the purpose of reinforcing the strength of existing pipes, anticorrosion measures, and water leakage / water infiltration measures. The amount of the filler used is the total amount of the resin (b) having a vinyl group and the polymerizable monomer (c) of 10
It is preferable to mix within 5 to 100 parts by weight with respect to 0 parts by weight. As the thickener, a metal oxide composed of a divalent metal oxide or a hydroxide is used, and examples thereof include magnesium oxide, magnesium hydroxide, calcium oxide, calcium hydroxide and the like. These may be used alone or in combination. The amount of thickener used is
The total amount of the vinyl group-containing resin (b) and the polymerizable monomer (c) is 100 parts by weight or less, preferably 3 parts by weight or less, and when used, preferably 0.1 parts by weight or more. .

The types and amounts of the above-mentioned fiber reinforcements, hardening retarders, thixotropic agents, fillers and thickeners can be appropriately selected according to the required characteristics, but the transmission of radiated energy It should be used so as not to cause significant coloration which could significantly reduce the rate.

In the present invention, visible light means 380 to 700n.
It means a light ray in the wavelength region of m. As the radiant energy source used for curing the photopolymerizable resin composition of the present invention,
A light source having a spectral distribution in the photosensitive wavelength region of the photopolymerization initiator can be used.For example, a fluorescent lamp, an incandescent lamp, a metal halide lamp, an amalgam lamp, a xenon lamp, a sodium lamp, a halogen lamp, a mercury lamp, a near infrared lamp, etc. Can be used. Among them, visible light metal halide lamps and halogen lamps, amalgam lamps, while radiating a wavelength effective for the decomposition of the photopolymerization initiator used in the present invention, the temperature of the irradiated object rises by the action of heat rays, curing reaction Is preferred because it promotes Further, visible light metal halide lamps or halogen lamps are more preferable because they have a wide variety of products from small to large bulb diameters, and it is easy to design an illuminator suitable for the tubular molded body to be repaired. . Since the light source is adapted to the photosensitive wavelength of the photopolymerization initiator, two or more kinds of light sources can be used together. The light intensity necessary for curing the tubular tube lining material impregnated with the photopolymerizable resin composition of the present invention is the photosensitivity of the photoinitiator (photosensitivity), the curability of the resin (b) having a vinyl group, Depending on the amount used, etc.,
Generally 10 mJ / cm ² or more, preferably 100 mJ
/ Cm ² or more light intensity. If the light intensity is too low, the photoreaction does not proceed sufficiently, and the cured product may not have sufficient strength.

A preferred embodiment of the present invention is shown in the attached FIG.
5 to FIG. 5, the description will be made step by step, but the present invention is not limited to this.

Energy emitted from a radiant energy source, for example, a lamp having a wavelength in the visible light region, cures the pipe lining material pressed against the inner wall surface of the pipe,
As a pipe lining method for forming a lining pipe, the method known in the above-mentioned publication is performed in compressed air,
According to the present invention, as shown in FIG. 1, a lamp (12), which is a radiant energy source, is immersed in a liquid fluid, for example, water (13), and a lamp (12) of a pipe lining material (11) inside a pipe (14) is formed. It is characterized in that it is cured.

Next, FIG. 2 (a) shows a tubular lining material (11) made of a material containing the photopolymerizable resin composition shown in FIG. 1 before being inserted into the pipeline. A cross section is shown, in which the photopolymerizable resin composition impermeable film layer (22) is the outermost layer, the fiber sheet layer (21) containing the photopolymerizable resin composition is the innermost layer, and the innermost layer is light transmissive and light-permeable. The polymerizable resin composition-impermeable film layer (23) is formed, and FIG. 2B shows a cross-sectional view of an example of a tubular lining material formed in a tubular shape. As the photopolymerizable resin composition impermeable film layer (22) and the light transmissive photopolymerizable resin composition impermeable film layer (23), use films of polyurethane, vinyl chloride, polyethylene, vinylon, etc. It is also possible to use a colored film for the photopolymerizable resin composition impermeable film layer (22), and it can be appropriately selected according to need.

FIG. 3A shows a tubular pipe lining material (11) made of a material containing the photopolymerizable resin composition shown in FIG.
FIG. 3 shows another example of the cross-section of the pipe lining material before being inserted into the pipe, wherein the outer layer is a light-transmissive and photopolymerizable resin composition impermeable film layer (23), and the inner layer is a photopolymerization layer. Comprising a fibrous sheet layer (21) containing a hydrophilic resin composition,
FIG.3 (b) has shown sectional drawing of another example of the pipe lining material formed in a tubular shape.

As shown in FIG. 4A, the manhole (4
A pipe lining material (11) having the structure shown in FIG. 2 is pulled and inserted into 1). The pipe (43) is attached to the manhole (41) side as an introduction side device of the pipe lining material (11) to be installed on the inner surface of the pipe (14), and the manhole (42) side is provided as an exit side device. A pipe (44) having a diameter corresponding to the diameter of the pipe (14) is attached. A pulling mechanism (47) for pulling a rope (46) described later is installed on the manhole (42) side so that the pipe lining material (11) can be pulled. In order to pull the pipe lining material (11) into the pipe (14), the rope (46) attached to the pulling mechanism (47) is passed through the pipe (44), the pipe (14) and the pipe (43) in this order. , Attach to the tip of the pipe lining material. Then
By actuating the towing mechanism (47) and towing the rope (46), the pipe lining material (11) is connected to the pipe (43) of the introduction side device, the pipe (14), and the pipe (44) of the exit side device. The leading end of the pipe lining material (11) on the pulling side reaches the pipe (44) of the outlet side device by being drawn and moved to the inner surface.

As shown in FIG. 4 (b), at the tip of the pipe lining material (11), a bobbin (45) having a function of discharging the inner water (13) out of the system of the pipe lining material (11).
Is attached to the bobbin (45), and a traction source for introducing a radiant energy source, which will be described later, in this case, a lamp (12) having a wavelength in the ultraviolet region into the tube lining material (11). A rope (48) is attached as a means, and this rope (48) has a traction mechanism (47).
Is designed to work. After connecting the rope (46) to the rope (48) attached to the bobbin (45), water (13) is injected into the inside of the pipe lining material (11) inserted into the introduction side device (43), The lining material (11) is pressed against the inner wall surface of the pipe (14).

As shown in FIG. 4C, the traction mechanism (4
7) is actuated, the rope (46) attached to the traction mechanism (47) is towed, the rope (48) connected to the rope (46) is further towed, and the radiation connected to the rope (48) The lamp (12), which is an energy source, is drawn into the pressed pipe lining material (11) through the introduction side device (43), and is inserted and moved to the tip side of the pipe lining material (11). Then, the lamp (12) is turned on, and the energy generated by the lamp cures the tubular lining material made of a material containing the photopolymerizable resin composition,
Form a lining tube.

Further, in the method shown in FIG. 5 (a), the stopper (51) for suppressing the pipe lining material (11) which has been completely inverted and inserted into the manhole (42) on the outlet side, which will be described later.
Is provided. From the introduction side manhole (41),
By supplying water (13) to the inside of the pipe lining material (11), the pipe lining material (11) having the structure shown in FIG. 3 (b) is light transmissive and impermeable to the photopolymerizable resin composition. The film layer (23) is inserted inside the tube (14) while being inverted so that the fiber sheet layer (21) containing the photopolymerizable resin composition is on the inside and the fiber sheet layer (21) containing the photopolymerizable resin composition is on the outside, and is sequentially expanded with water (13). It is then fed out, inverted and lined on the inner wall of the tube (14). As shown in FIG. 5 (b), a rope (48) is connected to the reaching tip portion of the pipe lining material (11), and the lamp (12) which is a radiant energy source is further connected to the rope (48). It is installed with a plurality of intervals. As the pipe lining material (11) is successively expanded by water (13) and sent out and moves while being inverted, the ramp (12) is drawn inside the pipe lining material (11) on the introduction side, and the inverted pipe Lining material (1
Move inside 1). As shown in FIG. 5 (c), when the pipe lining material (11) is brought into contact with the stopper (51) installed in the manhole (42) on the outlet side,
The reversal with water (13) is stopped, the lamp (12) is turned on, and the generated energy cures the tubular pipe lining material made of the material containing the photopolymerizable resin composition to form the lining pipe.

[0044]

EXAMPLES Next, the present invention will be described in more detail by way of examples, but the present invention is not limited thereto. Synthesis Example (Preparation of Unsaturated Polyester Resin Composition for Photopolymerizable Resin Composition) A compound consisting of 1412 g (0.40 mol) of isophthalic acid, 1548 g (0.70 mol) of neopentyl glycol and 0.25 g of hydroquinone, 5,000 equipped with thermometer, stirring blade, inert gas inlet tube, condenser
Charge into a 0 ml four-necked flask and 235 under a nitrogen stream.
The temperature was raised to 0 ° C., and the dehydration condensation reaction was performed by a usual method.
The reaction was stopped when the acid value reached 5 KOHmg / g.

To this, 1251 g of maleic anhydride (0.
60 mol), diethylene glycol 789 g (0.35
Mol) was added and the temperature was raised again to 225 ° C. to carry out a dehydration condensation reaction. When the acid value reached 24 KOHmg / g, the reaction temperature was lowered to 215 ° C. and the reaction was continued. The reaction was stopped when the acid value reached 16 KOHmg / g. Add 0.25g of hydroquinone to this,
An unsaturated polyester resin was obtained. The molecular weight of this product was 18,400 in terms of weight average molecular weight as determined by gel permeation chromatography in terms of standard polystyrene. 65 parts by weight of the obtained unsaturated polyester resin was dissolved in 35 parts by weight of a styrene monomer, and 0.003 g of 2,6-di-t-butyl-4-methylphenol and 1.2 g of aerosil were further added to perform photopolymerization. An unsaturated polyester resin composition for a resin composition was prepared. At this time,
The viscosity and thixotropy measured according to JIS K 6901 are
The values were 3.4 Pa · s and 2.0.

Example (Production of tube lining material resin composition and tube lining material) 3220 g of the unsaturated polyester resin composition for a photopolymerizable resin composition obtained in the synthesis example was treated with Irgacure as a photopolymerizable initiator (a). 6.44 g of 819 (manufactured by Ciba Specialty Chemicals, trade name), and Permek N
(Nippon Yushi Co., Ltd., trade name, methyl ethyl ketone peroxide) 6.44 g and 6% cobalt octenoate (6 wt% xylene solution of cobalt octenoate) 0.64 g were added to prepare a resin composition for pipe lining material. . Next, in a polyethylene film bag having a thickness of 100 μm, the weight per unit area was 9 g and the weight per unit area was 0.2 g / c.
A polyester felt having a size of m ² of 28 cm × 79 cm was put, and the resin composition for a pipe lining material immediately after preparation was injected. Next, using a vacuum pump, while depressurizing and defoaming the inside of the polyethylene film bag, the polyester felt is impregnated with the resin composition for the pipe lining material, the polyethylene film is sealed, and the strip-shaped pipe lining is sealed. I got the material.

The curability of the obtained pipe lining material when it was cured by visible light in water was evaluated by measuring the surface hardness. The test method was as shown below.

Visible light curing in water: A pipe lining material was placed in the circumferential direction on the inside of a pottery pipe having a diameter of 25 cm and a length of 60 cm, one end of which was sealed with a concrete plate. A mercury lamp (manufactured by Heraeus Co., Ltd.) as a light source was installed in the ceramic tube so as to be located above the tube lining material and at the inner center of the ceramic tube. Next, water was poured into this pottery tube, a concrete plate was placed on the other pipe mouth and sealed, and then the pottery tube was laid down and left to stand. The mercury lamp in the pot was turned on for 1.5 hours, and the visible light was irradiated in water. Then, the pipe lining material was taken out from the ceramic pipe, the surface hardness was examined, and the curability was evaluated. Surface hardness measurement: Using a Barcol hardness meter 935, the visible light irradiation surface (front surface) and the visible light non-irradiation surface (back surface) hardness of the pipe lining material were evaluated.

The surface hardness of the tube lining material on the visible light irradiation surface (front surface) is 75 to 80, and the surface hardness of the tube lining material on the non-visible light surface (rear surface) is 60 to 65. It was good.

[0050]

According to the pipe lining method of the present invention, the tubular pipe lining material obtained by impregnating the fiber-reinforced material with the photopolymerizable resin composition is used to complete the curing safely and promptly. And the lining pipe can be easily formed in the pipeline to be repaired.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an outline of one embodiment of a method for curing a photopolymerizable resin composition according to the present invention to form an inner lining pipe inside a conduit.

2 (a) and 2 (b) are partial cross-sectional views showing an outline of an embodiment of a tubular pipe lining material made of a material impregnated with a photopolymerizable resin composition according to the present invention. FIG. 3 is a vertical sectional view.

FIG. 3 (a) and FIG. 3 (b) are partial cross-sectional views showing an outline of an embodiment of a tubular pipe lining material made of a material impregnated with a photopolymerizable resin composition according to the present invention. FIG. 3 is a vertical sectional view.

FIG. 4 (a) is a partial cross-sectional view illustrating a method of moving a pipe lining material by pulling the pipe lining material, and FIG. 4 (b) is a diagram showing a liquid fluid pressure of the pipe lining material inserted in the pipe passage. Due to
4C is a partial cross-sectional view illustrating a method of pressing the inner wall surface of the pipe, and FIG. 4C illustrates a method of inserting a radiant energy source inside the pipe lining material pressed against the inner wall surface of the pipe by the liquid fluid pressure. FIG.

5 (a) is a partial cross-sectional view illustrating a method of supplying a liquid fluid into a tubular pipe lining material and inserting and moving the liquid inside the pipe line while reversing the pipe lining material. FIG. 5B is a partial cross-sectional view illustrating a method of inserting a radiant energy source inside the pipe lining material when the pipe lining material is inserted and moved inside the pipe line while being inverted.
(C) is a partial cross-sectional view for explaining the insertion movement of the tubular pipe lining material and the insertion completion state of the radiant energy source inside the pipe lining material.

[Explanation of symbols]

11 Tube Lining Material 12 Lamp 13 Water 14 Tube 21 Fiber Sheet Layer Containing Photopolymerizable Resin Composition 22 Photopolymerizable Resin Composition Impermeable Film Layer 23 Light Transmittable and Photopolymerizable Resin Composition Impermeable Film Layer 41 Manhole 42 Manhole 43 Introducing Side Device 44 Tube 45 Bobbin 46 Rope 47 Traction Mechanism 48 Rope 51 Stopper

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 4F211 AA24 AA39 AA41 AA44 AD16                       AD19 AD32 AG03 AG08 AH43                       SA13 SA14 SC03 SD04 SD11                       SD23 SN04 SN05 SN12 SP12

Claims (5)

[Claims] 1. A photopolymerizable resin composition comprising a photopolymerizable initiator (a) having photosensitivity in a visible light region, a resin (b) having a vinyl group and a polymerizable monomer (c) as essential components. A tubular pipe lining material made of a material impregnated with is inserted into the pipeline, and the pipe lining material is pressed against the inner wall surface of the pipeline by the liquid fluid pressure, and is impregnated by the energy emitted from the radiant energy source. A pipe lining method, wherein the photopolymerizable resin composition thus cured is cured to form a lining pipe inside the pipe. 2. The pipe lining method according to claim 1, wherein when the pipe lining material is inserted into the pipe, the pipe lining material is pulled to move inside the pipe, and the pipe lining material is piped by liquid fluid pressure. Pipe lining method that presses against the inner wall surface of the road. 3. The pipe lining method according to claim 1, wherein when the pipe lining material is inserted into the pipe, a liquid fluid is supplied into the tubular pipe lining material to invert the pipe lining material. A pipe lining method in which the pipe lining material is inserted and moved inside and is pressed against the inner wall surface of the pipe line. 4. The photopolymerizable resin composition impregnated in the pipe lining material pressed against the inner wall surface of the pipe by the liquid fluid pressure by the energy radiated from the radiant energy source is cured over the entire length of the pipe to form the pipe. The pipe lining method according to any one of claims 1 to 3, wherein an inner pipe is formed inside the passage. 5. The pipe lining method according to claim 1, wherein the energy radiated from the radiant energy source has a wavelength in a range that cures the photopolymerizable resin composition contained in the pipe lining material.