JP2001198980A - Pipe lining material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe lining material which is low-priced and shows high resistance to styrene and resistance to burst. SOLUTION: A composite ribbon seal tape 5 of a multi-layer structure is welded to the joint part of a tubular resin absorber 1A obtained by bonding a polyethylene film 3 with a thickness of 0.4 m/m or more to the outer peripheral face of a nonwoven fabric 2 formed of a needle-punched plastic fiber and thereby the joint part is sealed airtightly. In addition, the peripheral length of the joint part is set to be 87-97% of the value after the application of the pipe lining material 1 and the tubular resin absorber 1A is impregnated with an uncured curable resin to constitute the pipe lining material 1. The polyethylene film 3 which is low-priced and highly styrene-resistant is bonded to the outer peripheral face of the nonwoven fabric 2 to constitute the tubular resin adsorber 1A. The polyethylene film 3 is set to be 0.4 m/m or more thick and the composite rubber seal tape 5 having high adhesive properties and high burst resistance is welded to the joint part of the tubular resin adsorber 1A to reinforce the joint part. Consequently, it is possible to obtain the pipe lining material 1 which is low-priced and highly resistant to styrene and burst.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe lining material used for lining a deteriorated pipe.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried underground is deteriorated, the pipeline is repaired by lining its inner peripheral surface without excavating the pipeline from the ground. A pipe lining method is known.

[0003] In the above-mentioned pipe lining method, a pipe lining material obtained by impregnating an uncured curable resin into a flexible tubular resin adsorbent whose outer peripheral surface is covered with a highly airtight plastic film is applied by fluid pressure. After the pipe lining is inserted into the pipe while being turned over, the pipe lining is pressed against the inner peripheral surface of the pipe by fluid pressure, and the pipe lining is impregnated by heating or the like while maintaining the state. This is a method of repairing a pipe by forming a plastic pipe in the pipe by curing the resin.

Incidentally, the pipe lining material used in such a pipe lining method is manufactured so that its diameter is smaller than the pipe diameter beforehand in order to prevent generation of wrinkles at the time of lining, and is expanded by fluid pressure at the time of lining. And stretched until pressed against the inner wall of the pipeline. For this reason, the plastic film adhered to the outer peripheral surface of the pipe lining material has been similarly stretched.

[0005]

By the way, the material of the plastic film adhered to the outer peripheral surface of the pipe lining material has high burst resistance when stretched,
Although polyurethane and nylon having resistance to styrene contained in the curable resin have been used, these polyurethanes and nylon have a disadvantage that they are expensive.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an inexpensive pipe lining material having high styrene resistance and high burst resistance.

[0007]

In order to achieve the above-mentioned object, the invention according to claim 1 provides a polyethylene film having a thickness of 0.4 m / m or more on an outer peripheral surface of a nonwoven fabric made of a plastic fiber subjected to needle punching. A multi-layered composite ribbon seal tape is welded to the joint of the tubular resin adsorbent thus adhered to hermetically seal the joint, and the perimeter is set to 87 to 97% of the value after installation. A tubular lining material is formed by impregnating the uncured curable resin into the tubular resin adsorbent.

According to a second aspect of the present invention, in the first aspect of the present invention, a composite ribbon seal tape is provided between the polyethylene film adhered to the outer peripheral surface of the tubular resin adsorbent and the composite ribbon seal tape. Also, a ribbon tape having a small width and not adhering to the composite ribbon seal tape is provided.

According to a third aspect of the present invention, in the second aspect of the present invention, the one side of the ribbon tape is made of nylon or EV.
It is characterized by comprising a composite film made of OH or polyester.

According to a fourth aspect of the present invention, in the second aspect of the present invention, one side of the ribbon tape is formed of a woven fabric, and the other side is formed of a plastic film having high adhesiveness to polyethylene.

According to a fifth aspect of the present invention, in the first or second aspect of the present invention, the composite ribbon sealing tape is made of a composite film containing nylon or EVOH.

Therefore, according to the present invention, a tubular resin adsorbent is formed by attaching an inexpensive and highly styrene-resistant polyethylene film to the outer peripheral surface of the nonwoven fabric, and the polyethylene film has a thickness of 0.4 m / m or more. In addition, a composite ribbon seal tape with high adhesiveness and burst resistance is welded to the joint of the tubular resin adsorbent to reinforce the joint, so the pipe lining is inexpensive and has high styrene resistance and burst resistance. Material can be obtained.

By the way, the burst of the pipe lining material is related to the thickness and the elongation of the polyethylene film. When the thickness of the polyethylene film is set to 0.4 m / m or more, the pipe lining material is stretched by 13% by the fluid pressure. However, it was experimentally confirmed that there was no problem in the burst resistance of the pipe lining material. Therefore, in the present invention, the thickness of the polyethylene film is set to 0.4 m / m or more, and the perimeter of the pipe lining material is 87 to 97% of the value after installation.
Was set to.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 4 are sectional views showing a procedure for manufacturing a pipe lining material according to the present invention, and FIG. 5 is an enlarged detailed view of a portion A in FIG.

As shown in FIG. 4, the pipe lining material 1 according to the present invention has a thickness of 0.4 m on the outer peripheral surface of a non-woven fabric 2 made of a needle-punched plastic fiber.
The ribbon tape 4 and the composite ribbon seal tape 5 having a multilayer structure are welded to the joining portion of the tubular resin adsorbent 1A formed by applying the polyethylene film 3 having a thickness of at least 1 m / m to hermetically seal the joining portion. Of the tubular resin adsorbent 1A is reinforced with the resin adsorbing reinforcing material 6, and the perimeter of the tubular resin adsorbent 1A is 87
９７97%, and the tubular resin adsorbent 1A is impregnated with an uncured curable resin.

A pipe lining material 1 having the above structure will be described below.
Will be described.

When manufacturing the pipe lining material 1 according to the present invention, first, as shown in FIG. 1, a strip-shaped nonwoven fabric 2 made of plastic fiber is manufactured by needle punching. That is, in this needle punching processing, fibers such as polyester, acrylic, vinylon, etc. are piled up and punched by a large number of needles 7 moving up and down while moving the fibers at a predetermined speed in the arrow direction (left direction) in FIG. As a result, a strip-shaped nonwoven fabric 2 made of plastic fiber is obtained. In order to increase the strength of the cured product, a non-woven fabric 2 may be mixed with a cross-processed product such as glass fiber, carbon fiber, or Kevlar fiber.

In the needle punching process, the fibers of the nonwoven fabric 2 on the side where the needle 7 protrudes (the lower surface in FIG. 1) are harder to pull out than the fiber on the side where the needle 7 penetrates (the upper surface in FIG. 1). Has been confirmed.

Accordingly, in the next step, as shown in FIG. 2, a thickness of 0.4 m / m or more is formed on the side (lower surface in FIG. 2) of the band-shaped nonwoven fabric 2 obtained by needle punching from which the needle 7 protrudes. The highly airtight polyethylene film 3 is applied (coated). Incidentally, the polyethylene film 3 is inexpensive as compared with the polyurethane or nylon film, and has the same styrene resistance as the polyurethane or nylon film.

When the inexpensive and highly styrene-resistant polyethylene film 3 is applied to one surface (lower surface) of the nonwoven fabric 2 as described above, both ends in the width direction of the nonwoven fabric 2 are moved in the direction of the arrow in FIG. Then, the nonwoven fabric 2 is rolled as shown in FIG. 3 so that the polyethylene film 3 is on the outside, and its ends are joined to each other to obtain a tubular resin adsorbent 1A. For joining the butted portions of the strip-shaped nonwoven fabric 2, means such as welding, bonding with an adhesive, and sewing are used.

When the tubular resin adsorbent 1A is obtained as shown in FIG. 3, the ribbon tape 4 is welded to the outer surface of the joint of the tubular resin adsorbent 1A as shown in FIGS. Then, the composite ribbon sealing tape 5 having a multilayer structure is welded to the outside of the ribbon tape 4 so as to cover the ribbon tape 4 to hermetically seal the joint. Further, the ribbon-shaped resin adsorption reinforcing material 6 is welded to the inner surface of the joint of the tubular resin adsorbent 1A to reinforce the joint. The resin adsorption reinforcing material 6 is made of a nonwoven fabric, a mixture of a nonwoven fabric and a woven fabric, or a mixture of a nonwoven fabric and a glass fiber.

Here, the ribbon tape 4 is smaller in width than the composite ribbon seal tape 5 and is provided between the composite ribbon seal tape 5 and the polyethylene film 3. One side is nylon, EVOH. Or a composite film made of polyester, one side of which is made of a woven fabric of nylon, polyester, or the like, and the other side of which is made of a multilayer film made of a plastic film having high adhesiveness to polyethylene. Not. Accordingly, the composite ribbon seal tape 5 having a width larger than that of the ribbon tape 4 is welded to the polyethylene film 3 only at both ends in the width direction, and the inner surface of the central portion is not bonded to the ribbon tape 4. still,
The composite ribbon seal tape 5 is composed of a composite film containing nylon or EVOH or polyester, a composite film containing polyethylene, a composite film containing Admer, ionomer, EEA, or the like.

As shown in FIG. 4, the outer surface of the joint of the tubular resin adsorbent 1A is hermetically sealed by the ribbon tape 4 and the composite ribbon seal tape 5, and the inner surface of the joint is the resin adsorbent reinforcing material 6A. When the nonwoven fabric 2 of the tubular resin adsorbent 1A is impregnated with an uncured liquid curable resin, a desired pipe lining material 1 is obtained. As the uncured liquid curable resin impregnated in the nonwoven fabric 2, an unsaturated polyester resin, a vinyl ester resin, an epoxy resin, or the like is used.

The pipe lining material 1 according to the present invention manufactured through the above-described steps is used for repairing a pipe line. However, the pipe lining material 1 according to the present invention is an inexpensive polyethylene film having high styrene resistance. 3 is attached to the outer peripheral surface of the nonwoven fabric 2 to form the tubular resin adsorbent 1A, and the thickness of the polyethylene film 3 is set to 0.4 m / m or more.
The ribbon tape 4 and the composite ribbon seal tape 5 having high adhesiveness and burst resistance are welded to the outer surface of the joint of the tubular resin adsorbent 1A to hermetically seal and reinforce the joint, and Since the joining portion is reinforced by welding the resin adsorption reinforcing material 6 to the inner surface, the manufacturing cost of the pipe lining material 1 can be reduced, and the pipe lining material 1 can have high styrene resistance and burst resistance. it can.

The burst of the pipe lining material is related to the thickness and the elongation of the polyethylene film. When the thickness of the polyethylene film is set to 0.4 m / m or more, the pipe lining material is stretched by 13% by fluid pressure. However, it was experimentally confirmed that there was no problem in the burst resistance of the pipe lining material.

Therefore, in the pipe lining material 1 according to the present invention, the thickness of the polyethylene film 3 is set to 0.4 m / m or more, and the perimeter is set to a value of 87 to 9 after installation.
It was set to 7%.

Further, in the tube lining material 1 according to the present invention, since the ribbon tape 4 having a small width which does not adhere to the composite ribbon seal tape 5 is interposed between the polyethylene film 3 and the composite ribbon seal tape 5. The span length of the composite ribbon seal tape 5 at the joint with respect to the elongation of the pipe lining material 1 can be increased, and as a result, the composite ribbon seal tape 5 with respect to the elongation of the joint can be increased.
Allow room for growth.

Thus, the pipe lining material 1 according to the present invention is used for repairing a pipe, but at the time of lining, the pipe lining material 1 is inverted into a pipe (not shown) by fluid pressure such as air pressure. The pipe lining material 1 inserted and inverted into the pipe is expanded by the fluid pressure and pressed against the inner wall of the pipe, and is impregnated into the pipe lining 1 by being heated or the like while maintaining the state. The hardened resin is hardened, a plastic pipe is formed in the pipe, and the pipe is repaired.
In this case, as described above, since the circumference of the pipe lining material 1 is previously set to be 87 to 97% of the value after installation (after lining), the pipe lining material 1 expands due to fluid pressure and expands due to the inner wall of the pipe. There is no wrinkle generated in the tube lining material 1 which is pressed after the lining is cured after the lining.

[0030]

As is apparent from the above description, according to the present invention, a polyethylene film having a thickness of 0.4 m / m or more is applied to the outer peripheral surface of a nonwoven fabric made of needle-punched plastic fiber. A composite ribbon seal tape having a multi-layer structure is welded to the joint portion of the tubular resin adsorbent to hermetically seal the joint portion.
The pipe lining material is formed by setting the content to 7 to 97% and impregnating the uncured resin into the tubular resin adsorbent to obtain a pipe lining material which is inexpensive and has high styrene resistance and burst resistance. Can be.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a procedure for manufacturing a pipe lining material according to the present invention.

FIG. 2 is a cross-sectional view showing a procedure for manufacturing a pipe lining material according to the present invention.

FIG. 3 is a cross-sectional view showing a procedure for manufacturing a pipe lining material according to the present invention.

FIG. 4 is a cross-sectional view showing a procedure for manufacturing a pipe lining material according to the present invention.

FIG. 5 is an enlarged detail view of a portion A in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipe lining material 1A Tubular resin adsorbent 2 Nonwoven fabric 3 Polyethylene film 4 Ribbon tape 5 Composite ribbon seal tape 6 Resin adsorption reinforcing material 7 Needle

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 592004301 All Co., Ltd. 1-194, Hayashi, Tokorozawa-shi, Saitama 4 (72) Inventor Takao Kamiyama 31-27 Daikancho, Hiratsuka-shi, Kanagawa Shonan Synthetic Resin Co., Ltd. In-house (72) Inventor Yasuhiro Yokoshima 175-3 Shinoyama, Ishishita-cho, Yuki-gun, Ibaraki Pref.Yokoshimanai Co., Ltd. (72) Inventor Shigeru Endo 2-12-4 Hanahata, Tsukuba, Ibaraki Pref. Inventor Hiroyuki Aoki 1-194 Hayashi, Tokorozawa-shi, Saitama F-term in all four stock companies (reference) 3H024 EA01 EB08 EC07 ED01 EE01 EE05 4F211 AA04 AA36 AD16 SA13 SA14 SC03 SD04 SD11 SD18 SD23 SP12

Claims (5)

[Claims] 1. A non-woven fabric made of plastic fiber subjected to needle punching and having a thickness of 0.4 m
/ M is welded with a composite ribbon seal tape having a multilayer structure on the joint of the tubular resin adsorbent formed by applying a polyethylene film of at least / m, and the joint is hermetically sealed. A tube lining material which is set to 97% and is constituted by impregnating the uncured curable resin into the tubular resin adsorbent. 2. A ribbon tape having a width smaller than that of the composite ribbon seal tape and not adhering to the composite ribbon seal tape between the polyethylene film adhered to the outer peripheral surface of the tubular resin adsorbent and the composite ribbon seal tape. The pipe lining material according to claim 1, further comprising: 3. The ribbon tape is made of nylon, E
3. The pipe lining material according to claim 2, wherein the pipe lining material is made of a composite film made of VOH or polyester. 4. The pipe lining material according to claim 2, wherein one side of the ribbon tape is formed of a woven cloth and the other side is formed of a plastic film having high adhesion to polyethylene. 5. The tube lining material according to claim 1, wherein the composite ribbon sealing tape is formed of a composite film containing nylon or EVOH.