KR102075320B1 - Immersion Tube for repairing pipeline using hot-melt and Method for manufacturing the immersion tube - Google Patents

Abstract

The present invention relates to an immersion tube and, more specifically, to an immersion tube for maintenance, which is inversely inserted into a duct line to be installed tightly in the duct line by expanding. The immersion tube includes: a felt layer made of at least one of woven and unwoven fabrics; a film layer thermally fused with the outer surface of the felt layer; and a hotmelt layer thermally fused with the inner surface of the felt layer. As the immersion tube is inversely inserted into a duct line, the film layer is located on the inner surface, and the hotmelt located on the outer surface dissolves and adheres to the inner surface of the duct line during a hardening procedure and permeates the felt layer. The hotmelt layer is thicker than the felt layer, and the hardening procedure is conducted with heat of 65-100°C for 40-80 minutes. The hotmelt layer comprises ethylene-vinyl acetate (EVA) and maleic anhydride.

Description

Immunization tube for repairing pipeline using hot-melt and method for manufacturing the immersion tube

The present invention relates to a pipe regeneration repair impregnated tube using an adhesive as a hot-melt, a method for producing the impregnated tube, and a method for repairing a pipeline using the impregnated tube.

In general, water and sewage pipes and industrial pipes (gas, electricity, communication, etc.) that are buried underground are gradually aged over time, and in the case of water pipes, corrosion occurs and huge amounts of water are leaked. In order to repair the contaminated soil, the existing pipelines were excavated and replaced, or partially repaired.

However, the ground excavation method, along with damage to the surrounding environment, after the completion of the construction, not only the ground subsidence due to soil erosion, but also in the congested urban area caused traffic jams and inconveniences to the citizens.

As described above, in repairing an old buried pipeline in which cracks are damaged, the non-excavated pipeline repair method does not dig the ground, and inserts a reinforcement tube into the old buried pipeline in which cracks are generated to form a new composite pipe in the water pipe. As a road construction method, road repair construction is unnecessary, and thus, the construction method has many advantages in terms of constructability, reliability, and economic efficiency.

In general, the unexcavated pipeline repairing and construction method is a method of attaching and fixing a reinforcement impregnated tube formed of a waterproof coating layer or a film layer and an adhesive resin impregnated felt layer inside an aged buried pipe. The reinforcing impregnating tube is inverted into the inside of the buried pipe with the surface as the surface, so that the adhesive resin impregnated felt layer, which was the inner surface, is inverted to the surface and adhered to the inner wall of the buried pipe, and the reinforcing impregnating tube is coated on the inner wall of the buried pipe. .

At this time, the repair impregnated tube is inserted into the inner surface of the buried pipe by the hydraulic pressure or pneumatic inverted by the pipeline repair device and then hardened and fixed.

1 shows a cross-sectional view of a conventional repair impregnated tube 1 before reversal insertion, and FIG. 2 shows a cross-sectional view of a conventional repair impregnated tube 1 in an inverted state inserted into a conduit.

Conventionally, such a repair impregnated tube is provided with an outer shell and an inner shell, and the outer shell is composed of a film layer 5 made of a woven fabric and a synthetic resin, and the inner shell is a nonwoven fabric 3 laminated with a woven fabric 2, and such a nonwoven fabric and a woven fabric. The epoxy resin, which is a curable resin, is impregnated with the epoxy resin layer 4, or the nonwoven fabric or the woven fabric is composed of the polyurethane resin layer 4 with the polyurethane resin impregnated therein.

The repair-impregnated tube 1 shown in FIG. 1 is inverted and inserted into the conduit, and as shown in FIG. 2, when the endothelial is in close contact with the inner surface of the conduit, it is thermoset and fixed.

At this time, the reverse insertion of the repair impregnation tube is made by discharging the high temperature steam generated from the boiler into the repair impregnation tube by the air compressor. In addition, the thermosetting of the repair impregnated tube may be carried out by a high temperature steam, and after curing the cooling process to form a cured in place pipe (CIPP).

However, such a conventional repair impregnated tube is made of an inner skin and an outer skin film layer impregnated with an epoxy resin or polyurethane resin, the elongation in the longitudinal direction of the felt is not constant, the strength is weak, the thickness is thick, and the manufacturing process is complicated. The production time is long, the pot life of the impregnated tube impregnated with a polyurethane resin or an epoxy resin is short (pot life) has a disadvantage that it is impossible to build a long distance.

In addition, in order for the impregnation tube for repair to be fixed to the inner surface of the existing pipe, the high temperature steam must be gradually heated to prevent cracking due to the characteristics of the epoxy resin and provided continuously for a long time. There was a problem of rising.

In addition, since the existing polyurethane resin or epoxy resin is a liquid, the air pressurized by the expansion of humidity and hardening heat in the pipeline during the hardening process causes vaporization, and the inverted impregnated tube is not discharged to the outside due to the end point of the pipeline being closed. There was a problem that the lifting phenomenon occurs.

Republic of Korea Patent Registration 10-1530862 Republic of Korea Patent Registration 10-1131862 Republic of Korea Patent Registration 10-1804486

Therefore, the present invention has been made in order to solve the conventional problems as described above, in accordance with an embodiment of the present invention, a hot melt (hot-melt) in the felt layer consisting of a film layer and non-woven or woven fabric consisting of PE or PP film ) Is manufactured at the same time in the process of making the repair impregnated tube by heat fusion, so that the conventional impregnation process of epoxy resin or polyurethane resin, which can omit the impregnation process of epoxy resin or polyurethane resin, the manufacture of the impregnated tube for rehabilitation repair tube, the adhesive tube with hot melt The purpose is to provide a method and a pipeline repair method.

According to an embodiment of the present invention, the hot melt layer attached by heat fusion during the manufacturing of the repair impregnated tube is a solid, so it is not affected by the external air temperature (below 60 ° C.) in the storage method and does not affect the external air temperature. As there is no restriction on pot life, no need for refrigeration and refrigeration equipment, and no pot life, adhesives that can cope with sudden on-site situations (eg sudden traffic control, complaints, etc.) before supplying heat after reversal The purpose of the present invention is to provide a regeneration repair impregnated tube, a method for manufacturing the impregnated tube, and a pipeline repair method using a hot melt.

And according to the embodiment of the present invention, by measuring the construction distance in the field in advance to repair the impregnated tube for repair, the joint sewing work to make a circle of felt, the sewing part according to the material of the film layer (PE or PP film) Pipe (PE or PP film) welded with welding resin and stored in material warehouse, which can improve construction convenience. The purpose is to provide a repair method.

And according to the embodiment of the present invention, in the curing method, the hot melt layer is solid, so that it is converted into a liquid by applying heat and can be bonded in the process of cooling after close contact with the existing pipe, the adhesive regeneration repair impregnation using hot melt adhesive It is an object of the present invention to provide a tube, a method of manufacturing the impregnated tube, and a pipe repair method.

In addition, since the existing resin is a liquid, the air pressurized by the expansion of humidity and hardening heat in the pipeline during the hardening process causes vaporization, and the inverted repair tube is partially discharged because the end point of the pipeline is closed and cannot be discharged to the outside. However, according to the embodiment of the present invention, the hot melt resin is dissolved by heat and penetrated into the nonwoven fabric or woven fabric layer, so that the adhesive is completed during the cooling process after adhesion with the existing pipe, so that there is no lifting due to vaporization phenomenon, the pipeline using the adhesive as a hot melt It is an object of the present invention to provide a rehabilitation repair impregnation tube, a method of manufacturing the impregnation tube, and a pipeline repair method.

In addition, the conventional curing method was cured by supplying a high temperature of 2-3 hours at 105 ℃, the hot melt according to the embodiment of the present invention can be cured for 1 hour at 65 ~ 100 ℃ can achieve a low calorific curing method It is an object of the present invention to provide an impregnation tube for rehabilitation repair of a pipeline using an adhesive as a hot melt, a manufacturing method of the impregnation tube, and a pipeline repairing method.

According to an embodiment of the present invention, the film layer (PE, PP film) is inverted on the contact surface with water, a felt layer composed of a nonwoven fabric or a woven fabric in the intermediate layer, hot melt is installed on the surface in contact with the inner wall of the existing pipe, all the members (PE or elongation at break of PP film, woven felt, non woven felt, hot-melt) DCIP 10% (KS D 4311: 2010), coating steel pipe 18% (KS D 3565: STWW400), city gas pipe 30% (KS D 3631: 2018-SPPS) Since the elongation at break exceeds 30%, there is no brittle fracture due to the lack of elongation at break. The purpose is to provide.

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly to those skilled in the art from the following description. Can be understood

A first object of the present invention is a repair impregnated tube installed in close contact with a pipeline as it is expanded by reversing the insertion into a pipeline, the felt layer comprising at least one of a woven fabric and a nonwoven fabric; A film layer heat-sealed and laminated on the outer surface of the felt layer; And a hot melt layer thermally fused to the inner surface of the felt layer. The hot melt layer is inverted and inserted into a pipeline, and the film layer is positioned on the inner surface. Penetrated into the felt layer, the thickness of the hot melt layer is greater than the thickness of the felt layer, the curing process proceeds in the range of 40 to 80 minutes with heat of 65 ~ 100 ℃, the hot melt layer, EVA (Ethylene-Vinyl acetate) And, it can be achieved as a regeneration repair impregnated tube using a hot melt using an adhesive, characterized in that consisting of maleic acid hydride.

The hot melt layer may be characterized by comprising 99.0 to 99.9 wt% of EVA, greater than 0 to 0.02 wt% of maleic anhydride, and an antioxidant and a slip agent as the remainder.

According to a second object of the present invention, there is provided a method for manufacturing a repair impregnated tube according to the first object, the method comprising: manufacturing a felt layer composed of at least one of a woven fabric and a nonwoven fabric; Stacking a film layer composed of at least one of a polyethylene film and a polypropylene film on an outer surface of the felt layer; And thermally fusion bonding the hot melt layer to the inner surface of the felt layer, wherein the hot melt layer comprises 99.0 to 99.9 wt% of the solid EVA in pellet form and 0 to 0.02 wt% of maleic acid hydride in powder form. In addition, by stirring and mixing the antioxidant and the slip agent, it can be achieved as a manufacturing method of the tube regeneration repair impregnated tube using a hot melt adhesive, characterized in that it is produced in the form of a film through an extrusion T-die.

A third object of the present invention is to repair a pipeline using a repair impregnation tube, the method comprising: manufacturing a repair impregnation tube according to the first object mentioned above; Inverting and inserting the impregnation tube into the conduit; Applying a heat in the curing process to dissolve the hot melt layer located on the outer surface in contact with the inner surface of the pipe; And dissolving the melted hot melt on the inner surface of the conduit by cooling, wherein the curing process is performed in a range of 40 to 80 minutes with heat of 65 to 100 ° C. It can be achieved as a pipeline repair method using a solvent impregnation tube.

And the pipe to be repaired may be characterized in that the cast iron pipe, water coating steel pipe, concrete pipe, or city gas pipe of the water pipe.

According to the pipe rehabilitation repair impregnated tube using the adhesive according to an embodiment of the present invention, the manufacturing method and the pipe repair method of the impregnation tube, a felt layer consisting of a film layer consisting of a PE or PP film and a non-woven or woven fabric At the same time in the process of manufacturing a repair impregnated tube by fusion of hot-melt (hot-melt) in heat, there is an advantage that can be omitted the impregnation process of the conventional epoxy resin or polyurethane resin.

According to the pipe rehabilitation repair impregnation tube using the adhesive according to an embodiment of the present invention, the manufacturing method of the impregnated tube and the repair method of the pipe, the hot melt layer attached by heat fusion during the manufacturing process of the repair impregnation tube is a solid The storage method is not affected by the external temperature (below 60 ℃), and does not affect the external temperature, so there is no restriction on pot life, no need for refrigeration and refrigeration equipment, and no limitation on pot life. It has the effect of coping with on-site accidents (eg sudden traffic control, complaints) before supply.

And according to the pipeline rehabilitation repair impregnated tube using the adhesive according to an embodiment of the present invention, the manufacturing method of the impregnated tube and the pipeline repair method, by cutting the construction impregnated tube in advance by measuring the construction distance in the field, felt Sewing work to make a circular shape of the joint, welding the sewing part with the welding layer of the film layer (PE or PP film) according to the material of the film layer (PE or PP film) and stored in the material warehouse to improve construction convenience It has an effect that can be made.

And according to the pipe rehabilitation repair impregnated tube using the adhesive according to an embodiment of the present invention, the manufacturing method of the impregnated tube and the method for repairing the pipe, in the curing method, since the hot melt layer is solid, it is converted into a liquid by applying heat. After the close contact with the cooling process has the effect that the adhesion can be made.

In addition, since the existing resin is a liquid, the air pressurized by the expansion of humidity and hardening heat in the pipeline during the hardening process causes vaporization, and the inverted repair tube is partially discharged because the end point of the pipeline is closed and cannot be discharged to the outside. However, according to the pipe rehabilitation repair impregnated tube using the adhesive according to an embodiment of the present invention, the manufacturing method of the impregnated tube, and the pipe repair method, the hot melt resin is dissolved by heat and penetrated into the non-woven or woven layer to the existing pipe Since the adhesion is completed in the cooling process after the over adhesion and there is no lifting due to the vaporization phenomenon.

In addition, the conventional curing method was cured by supplying a high temperature of 2-3 hours at 105 ℃, the hot melt according to the embodiment of the present invention can be cured for 1 hour at 65 ~ 100 ℃ can achieve a low calorific curing method Has the effect.

According to an embodiment of the present invention, the film layer (PE, PP film) is inverted on the contact surface with water, a felt layer consisting of a nonwoven or woven fabric in the intermediate layer, hot melt is installed on the surface in contact with the inner wall of the existing pipe, all the members (PE or PP film, woven felt, non woven felt, hot-melt) elongation at break is DCIP 10% (KS D 4311: 2010), coated steel pipe 18% (KS D 3565: STWW400), city gas pipe 30% (KS D 3631: 2018-SPPS) is more than 30% elongation at break, there is no brittle fracture due to lack of elongation at break.

On the other hand, the effects that can be obtained in the present invention is not limited to the above-mentioned effects, other effects that are not mentioned will be clearly understood by those skilled in the art from the following description. Could be.

The following drawings, which are attached to this specification, illustrate one preferred embodiment of the present invention, and together with the detailed description thereof, serve to further understand the technical idea of the present invention. It should not be construed as limited.
The following drawings, which are attached to this specification, illustrate one preferred embodiment of the present invention, and together with the detailed description thereof, serve to further understand the technical idea of the present invention. It should not be construed as limited.
1 is a cross-sectional view of a conventional repair impregnation tube before reversal insertion;
Figure 2 is a cross-sectional view of a conventional repair impregnation tube in a state inserted inverted in the existing buried pipe,
3 is a cross-sectional view of the reinforcing tube repair reinforcement tube using the adhesive as a hot melt, before the reverse insertion according to an embodiment of the present invention,
Figure 4 is a cross-sectional view of the reinforcing tube repair reinforcement tube using the adhesive according to an embodiment of the present invention in the state inserted inverted into the existing buried pipe hot melt,
5 is a cross-sectional view of a field hardening tube (CIPP) in which a hot melt resin is melted by heat according to an embodiment of the present invention and penetrated into a felt layer to complete bonding in a cooling process after bonding with an existing buried pipe;
Figure 6a is a photo of the reinforcing tube repair reinforcement impregnated tube using a hot melt adhesive before curing according to an embodiment of the present invention,
Figure 6b is a photograph of a pipe rehabilitation repair impregnated tube using an adhesive after curing according to an embodiment of the present invention, hot melt,
Figure 7 shows a flow chart of the pipeline repair method using the reinforcing tube repair reinforcement tube using the adhesive as a hot melt according to an embodiment of the present invention.

The above objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and to fully convey the spirit of the invention to those skilled in the art.

In the present specification, when a component is mentioned as being on another component, it means that it may be formed directly on the other component or a third component may be interposed therebetween. In addition, in the drawings, the thickness of the components are exaggerated for the effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional and / or plan views, which are ideal exemplary views of the present invention. In the drawings, the thicknesses of films and regions are exaggerated for effective explanation of technical content. Therefore, the shape of the exemplary diagram may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in forms generated by the manufacturing process. For example, the region shown at right angles may be round or have a predetermined curvature. Thus, the regions illustrated in the figures have properties, and the shape of the regions illustrated in the figures is intended to illustrate a particular form of region of the device and not to limit the scope of the invention. Although terms such as first and second are used to describe various components in various embodiments of the present specification, these components should not be limited by such terms. These terms are only used to distinguish one component from another. The embodiments described and illustrated herein also include complementary embodiments thereof.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the words 'comprises' and / or 'comprising' do not exclude the presence or addition of one or more other components.

In describing the specific embodiments below, various specific details are set forth in order to explain the invention more specifically and to help understand. However, one of ordinary skill in the art can understand that the present invention can be used without these various specific details. In some cases, it is mentioned in advance that parts of the invention that are commonly known in the description of the invention and which are not highly related to the invention are not described in order to prevent confusion for no reason.

Hereinafter will be described the configuration and function of the reinforcing tube repair reinforcement tube using the adhesive according to an embodiment of the present invention as a hot melt.

Figure 3 shows a cross-sectional view of the reinforcement repairing impregnated tube for reinforcement of the pipeline using the adhesive as a hot melt, before the reverse insertion according to an embodiment of the present invention, Figure 4 is an embodiment of the present invention in a state inverted inserted into the existing buried It shows a cross-sectional view of the pipe regeneration repair impregnation tube using an adhesive according to hot melt. 5 is a cross-sectional view of a field hardening tube (CIPP) in which a hot melt resin is melted by heat according to an embodiment of the present invention and penetrated into the felt layer 10 to be bonded to an existing buried tube and then bonded in a cooling process. will be. And Figure 6a is a picture of a pipe regeneration repair impregnated tube using a hot melt adhesive before curing according to an embodiment of the present invention, Figure 6b is a pipe regeneration repair impregnation using a hot melt adhesive after curing according to an embodiment of the present invention Picture of the tube.

As shown in Figure 3, the repair impregnated tube 100 is produced, the film layer 5 is located in the outer shell and the felt layer 10 on the inner surface of the film layer 5, the hot melt on the inner surface of the felt layer 10 It can be seen that the (hot-melt) layer 20 is formed by heat fusion.

The felt layer 10 is composed of at least one of a woven fabric and a nonwoven fabric. The film layer 5 may be composed of at least one of a silver polyethylene (PE) film and a polypropylene (PP) film. The hot melt layer 20 is thermally fused to the inner surface of the felt layer 10. And the thickness of the hot melt layer 20 is configured to be larger than the thickness of the felt layer 10.

The repair impregnated tube 100 is inserted into the existing buried tube 6 is inverted into the film layer 5 is located on the inner surface, while the hot melt is dissolved on the outer surface during the curing process is in close contact with the inner surface of the pipe and bonded in the cooling process Will be. In addition, during the curing process, the hot melt is dissolved to penetrate the felt layer 10.

In other words, the repair impregnated tube 100 according to the embodiment of the present invention is a hot melt (hot melt) in the film layer 5 (PE or PP film) and the felt layer 10 (non-woven or woven fabric) produced repair tube In the process, it is fused with heat and produced at the same time. Since the film layer 5 and the hot melt are not attached to each other, the felt layer 10 composed of a woven or nonwoven fabric is applied to the intermediate layer by heat fusion.

Hot melt layer 20 according to an embodiment of the present invention corresponds to a film form, it may be composed of ethylene-vinyl acetate resin hot melt (EVA, Ethylene-Vinylacetate copolymer hot melt adhesives). It is based on the copolymerized resin of ethylene vinyl alcohol and vinyl acetate.

In addition, the hot melt layer according to an embodiment of the present invention may be configured to include more specifically EVA and maleic acid hydride (musa male). By including maleic anhydride, it is possible to maximize the adhesion to the metal, felt, film layer.

In the case of the maleic anhydride is strong adhesion to the metal is difficult to uniformly mix during the mixing process with EVA, and includes an antioxidant and slip blocking (slip) blocking agent.

Therefore, the hot melt layer according to the embodiment of the present invention, 99.0 to 99.9 weight% of EVA, more than 0 to 0.02% by weight of maleic anhydride, and the remainder includes an antioxidant and a slip agent.

In a specific embodiment, the hot melt layer comprises 99.9% by weight of EVA, 0.01% by weight of maleic anhydride, and the balance thereof as an antioxidant and a slip agent.

Manufacturing method is 99.9% by weight of the solid EVA in the form of pellets, 0.01% by weight of maleic acid hydride in the form of powder, and the antioxidant and slip agent is added to the stirrer and mixed with stirring.

After mixing, the mixture is extruded through an extrusion T die to prepare a hot melt layer in the form of a film. Table 1 is a physical property table of the hot melt layer prepared according to the embodiment of the present invention.

TABLE 1

As shown in Table 1, the melt index is 2 ± 0.5 g / min and the density is 0.95 g / cm3. In addition, the tensile strength is 120 kg / cm2, it can be seen that the elongation is 700% or more.

And melting point is 74 ℃, the adhesive strength can be seen that more than 3kg / cm. Therefore, EVA according to an embodiment of the present invention, maleic anhydride-based hot melt is not affected in the external room temperature range, the existing curing method can be cured in less than 1 hour at a low temperature of 60 ~ 80 ℃, anhydrous with EVA The lanes are mixed so that they can have maximum adhesion.

In addition, the thickness of the hot melt layer 20 should be at least thicker than the felt layer 10, the hot melt is dissolved in heat and completely penetrated into the felt layer 10 (non-woven or woven fabric) to integrate the film layer 5 and the hot melt Separation does not occur. After repair impregnation tube hardening, the hot melt penetrates and the final CIPP becomes thinner.

Therefore, the pipe rehabilitation repair impregnated tube 100 using the adhesive according to the embodiment of the present invention hot melt to the felt layer 10 composed of a nonwoven or woven fabric and a film layer 5 composed of PE or PP film By fusion with heat, it is produced at the same time in the process of manufacturing the repair impregnated tube 100, so that the conventional impregnation process of the epoxy resin or polyurethane resin can be omitted.

In addition, according to the pipeline rehabilitation repair impregnated tube 100 using the adhesive according to the embodiment of the present invention, the hot melt layer 20 that is attached by heat fusion during the repair impregnation tube 100 manufacturing process is a solid In the storage method, it is not affected by the external temperature (below 60 ℃), it does not affect the external temperature, so there is no restriction on pot life, no need for refrigeration and refrigeration equipment, and no limitation on pot life. It is possible to cope with on-site accidents (eg sudden traffic control, complaints, etc.) before supplying the service.

And according to the pipeline rehabilitation repair impregnation tube 100 using the adhesive according to an embodiment of the present invention, the construction distance in the field to measure the repair impregnation tube 100 in advance, for making a circle of felt Joining work sewing, sewing parts are welded with a film layer 5 (PE or PP film) welding resin according to the material of the film layer 5 (PE or PP film) and stored in the material warehouse, so construction convenience It can be improved.

Hereinafter will be described the pipeline repair method using the aforementioned repair impregnation tube (100). Figure 7 shows a flow chart of a pipeline repair method using a pipe regeneration repair impregnation tube 100 using the adhesive as a hot melt according to an embodiment of the present invention.

First, to produce a pipe rehabilitation repair impregnation tube 100 using the above-mentioned adhesive as a hot melt (S1). Then, the repair-impregnated tube 100 is inserted into the pipeline inverted (S2). After the reversal insertion, as shown in Figure 4, the hot melt layer 20 is located outside the inner surface of the existing buried pipe, the film layer 5 is located on the inside and the felt layer 10 is located in the intermediate layer It can be seen that.

In addition, the hot melt layer 20 positioned on the outer surface by applying heat in the curing process (S3) is in contact with the inner surface of the pipeline to be dissolved (S4), and the melted hot melt is adhered to the existing buried pipe inner surface by the cooling process (S5). .

This curing process will proceed in the range of 40 to 80 minutes with a heat of 65 ~ 100 ℃. And this repair method can be applied to the cast iron pipe, water coating steel pipe, concrete pipe, or city gas pipe of the water pipe.

Therefore, according to the pipeline repair method using the pipe rehabilitation repair impregnated tube 100 using the adhesive according to the embodiment of the present invention, since the hot melt layer 20 is a solid in the curing method is changed to a liquid by applying heat to the existing pipe After close contact with each other, the adhesion can be achieved in the cooling process.

In addition, since the existing resin is a liquid, the air pressurized by the humidity and the heat of hardening in the pipeline during the hardening process causes vaporization, and the reversed repair tube is partially discharged because the end point of the pipeline cannot be discharged to the outside. However, according to the pipeline repair method using the pipe rehabilitation repair impregnated tube 100 using the adhesive according to the embodiment of the present invention, the hot melt resin is dissolved by heat and penetrated into the nonwoven fabric or woven layer and then bonded with the existing pipe Since the adhesion is completed during the cooling process, there is no lifting due to vaporization.

According to the conventional curing method, but hardened by supplying a high temperature of 2 to 3 hours at 105 ℃, according to the pipeline repair method using the reinforcement repair impregnation tube 100 for repairing the pipeline using the adhesive according to the embodiment of the present invention hot melt Since the hot melt can be cured at 65 to 100 ° C. for 1 hour, a low calorific curing method can be achieved.

In addition, according to the pipeline repair method using a pipe regeneration repair impregnation tube 100 using the adhesive according to the embodiment of the present invention, the film layer (5) (PE, PP film) is in contact with the water after inversion, The felt layer 10 composed of nonwoven fabric or woven fabric in the middle layer, hot melt is installed on the surface in contact with the inner wall of the existing pipe, and the elongation at break of all members (PE or PP film, woven felt, non woven felt, hot-melt) is DCIP. 10% (KS D 4311: 2010), 18% of the uniformed steel pipes (KS D 3565: STWW400), 30% of the city gas pipes (KS D 3631: 2018-SPPS), exceeding 30% elongation at break, so brittle due to lack of elongation at break There is no crack.

In addition, the above-described apparatus and method may not be limitedly applied to the configuration and method of the above-described embodiments, the embodiments may be a combination of all or part of each embodiment selectively so that various modifications may be made It may be configured.

1: Conventional Repair Impregnation Tube
2: woven fabric
3: nonwoven fabric
4; resin layer
5: film layer
6: existing tube
10: felt layer
20: hot melt layer
100: impregnated tube for rehabilitation of the pipeline using adhesive as a hot melt

Claims (5)

In the repair impregnating tube is installed in close contact with the pipeline as it is inverted by inserting and expanding in the pipeline,
A felt layer composed of at least one of a woven fabric and a nonwoven fabric;
A film layer heat-sealed and laminated on the outer surface of the felt layer; And
And a hot melt layer thermally fused to the inner surface of the felt layer.
Inverted and inserted into the pipeline is the film layer is located on the inner surface, hot melt is located on the outer surface during the curing process is in contact with the inner surface of the pipeline while being melted, and penetrated into the felt layer,
The thickness of the hot melt layer is larger than the thickness of the felt layer,
The curing process is carried out in the range of 40 to 80 minutes with heat of 65 to 100 ℃,
The hot melt layer, EVA (Ethylene-Vinyl acetate) and maleic acid hydride, characterized in that the adhesive as a hot melt reinforcing tube rehabilitation repair tube.
The method of claim 1,
The hot melt layer,
99.0 to 99.9% by weight of EVA, more than 0% to 0.02% by weight of maleic acid hydride, and an antioxidant and a slip agent as the remainder thereof.
In the manufacturing method of the impregnation tube for repair according to claim 1 or 2,
Preparing a felt layer composed of at least one of a woven fabric and a nonwoven fabric;
Stacking a film layer comprising at least one of a polyethylene film and a polypropylene film on an outer surface of the felt layer; And
And heat-sealing the hot melt layer on the inner surface of the felt layer.
The hot melt layer is pelletized solid EVA 99.0 ~ 99.9 wt%, powdered maleic acid hydride 0% ~ 0.02% by weight, and mixed with an antioxidant and a slip agent by stirring, the film through the extrusion T die Method for producing a pipe rehabilitation repair impregnation tube using an adhesive, characterized in that it is produced in the form of hot melt.
In the pipeline repair method using a repair impregnation tube,
Manufacturing a repair impregnation tube according to claim 1;
Inverting and inserting the impregnation tube into the conduit;
Applying a heat during the curing process to dissolve the hot melt layer located on the outer surface in contact with the inner surface of the pipe; And
The melted hot melt is bonded to the inner surface of the conduit by a cooling process;
The hardening process is a pipeline repair method using an impregnated tube for rehabilitation repair using a hot melt with an adhesive, which is characterized in that it is performed in a range of 40 to 80 minutes with heat of 65 to 100 ° C.
The method of claim 4, wherein
The pipe to be repaired is a cast iron pipe, water pipe, concrete pipe, or city gas pipe of a water pipe.

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