JPH0525871Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lining material that is mainly applied to the walls of structures such as tunnels and sewer pipes.

[Conventional technology]

For the walls of non-cylindrical structures such as tunnels, it has been considered to form a lining layer by alternately laminating polyester resin and glass fiber while degassing them and then curing them.
Laminating and defoaming work is time-consuming, and there is concern that large amounts of styrene, the solvent for FRP, will evaporate, worsening the working environment.

Furthermore, a lining layer was formed on the wall surface of a cylindrical structure such as a sewer pipe by inserting a pipe material into the structure and injecting mortar or the like between the structure and the pipe material. However, this method lacks adaptability to large-diameter cylindrical bodies, and has the disadvantage that the internal passage after lining becomes extremely narrow due to the thickness of the lining layer.

In order to eliminate such concerns and difficulties, the present applicant previously proposed the following lining method.

In this method, as shown by the imaginary lines in FIG. The basic method is to press the lining material 1 in an uncured state against the wall surface of the sewer pipe 100 by inflating the lining material 1 by injecting air and make it adhere tightly, and then to cure it as it is by irradiating it with ultraviolet rays. shall be. This method eliminates the need for the laborious lamination and defoaming work described above, prevents deterioration of the working environment, and is suitable for not only small and medium-sized sewer pipes, but also large-diameter sewer pipes and non-sewage pipes. It can be sufficiently applied to structures such as cylindrical tunnels, and since the lining layer is thin, even if the structure is a cylinder like the sewer pipe 100, the internal passage of the cylinder after lining is not so large. It has the advantage of not being cramped.

The lining material used in the above method is FRP.
The base material layer is a sheet or tube made of an ultraviolet curable synthetic resin such as UV curable synthetic resin, etc., and the uncured base material layer is sticky due to its adhesiveness and is difficult to handle. In order to improve its handling properties, as shown in FIG. 7, film-like coating layers 12 and 13 are superimposed on both the inner and outer surfaces of a base layer 11 made of a poval (polyvinyl alcohol: PVA) sheet or tube. This is referred to as lining material 1. Then, as shown by the solid line in FIG.
After the sheet or tube 1 was pressed against the wall surface and cured, the inner surface coating layer 13 was peeled off from the sheet or tube 1, as can be inferred from FIG.

[Problems that the invention is intended to solve]

However, as described above, in order to improve the handling properties of the base layer 11, the coating layer 13 is formed on the inner surface of the base layer 11.
When laminating the base material layer 1,
1 and the covering layer 13, the defoaming work is forced out from the end of the base material layer to remove it, and this defoaming work requires a lot of time and skill. It was hot. Also, sewer pipe 1
After constructing the lining material 1 on the wall of a structure such as 00, it is necessary to peel off the inner covering material 13, but since the distance between sewer pipe manholes is very long at 50 to 100 m, even if you try to remove the covering material 13, it will be difficult to remove the covering material 13. The problem was that it was difficult to apply force and it was difficult to peel it off.

The present invention solves the above-mentioned difficulties of conventional lining materials, and allows for easy defoaming when laminating the covering material on the inner surface of the base material layer. To provide a lining material that can be easily peeled off.

[Means for solving problems]

In order to solve the above problems, the lining material of the present invention uses an uncured sheet or tube made of an ultraviolet curable synthetic resin as a base layer, and a film-like coating layer is laminated on both sides of this base layer. The main feature of this lining material is that, among the coating layers laminated on the base layer, a large number of cracks are formed in the coating layer on the side opposite to the lining surface.

[Effect]

According to the above means, since the covering layer laminated on the opposite side to the lining surface has many cracks, when the covering layer is laminated on the base material layer, the cracks are inserted between the two. Air trapped inside is released to the outside. In addition, the lining material is constructed so that the coating layer with cracks is on the opposite side of the lining surface, and when peeling off the coating layer after construction, hold the edge of the coating layer or other appropriate place with your hands and pull it. If it is stretched, the coating layer is not in close contact with the entire surface of the base layer due to the cracks, so the coating layer can be easily peeled off.

〔Example〕

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

In the lining material 1 illustrated in FIG. 1, the base material layer 11 is an uncured polyester resin mixed with glass fibers and a catalyst activated by ultraviolet rays.
The film-like covering layers 12 and 13 made of FRP and laminated on both sides of the base layer 11 are both made of PVA.
Or made of polyethylene terephthalate (PET). A large number of cracks 2 are formed in the covering layer 13 laminated on one side of the base layer 11, and the covering layer 13 is arranged on the side opposite to the lining surface. In FIG. 1, the crevice 2 is a cut-like part with no opening, but the crevice 2 may be an open hole as shown in FIG. 2. When the fissure 2 is in the form of the former cut, uncured FRP is difficult to flow out from the fissure 2, so there is an advantage that the lining material 1 can be handled better than when the fissure 2 is the latter hole. .

The lining material 1 described above is manufactured by laminating the coating layers 12 and 13 on the base layer 11, but when the coating layer 13 is laminated on the inner surface of the base layer 11, there is The trapped air easily escapes to the outside through the cracks 2 by pressing the covering layer 13 against the base layer 11. Therefore, the defoaming work during lamination becomes much easier than in the past.

Next, when constructing the lining material 1 on the lining surface that is the wall surface of a cylindrical structure such as a sewer pipe, if the lining material 1 has a tube shape, the coating layer 13 having the fissures 2 will be on the inside of the tube. Covering layers 12 and 13 are laminated on both sides as shown in FIG.
The cylindrical lining material 1 is folded flat and inserted into a sewer pipe, the lining material 1 is inflated by blowing pressurized air into the lining material, and the lining material is pressed against the wall of the structure in an uncured state. The coating layer 13 exposed on the inner surface of the sewer pipe is peeled off from the base material layer 11 after curing.

In the above case, if the lining material 1 is in the form of a sheet, as is clear from FIG. are folded back to face each other, and are placed along the outer periphery of the core body 202. A transparent tape 203 that transmits ultraviolet rays is fed to the overlapped portions of the left and right ends, and is pressed with a presser roll 204 to form the above-mentioned left and right edges. The ends are pasted together to form a tube shape, and further flattened using a presser roll 205. At this time, the coating layer 13 having the cracks 2 is placed on the inner surface side of the tube. The lining material 1 thus formed into a flat shape is inserted in an uncured state into a sewer pipe as shown by the imaginary line in FIG.
Similarly to the above, pressurized air is blown into the lining material 1 to inflate it, and after curing by ultraviolet irradiation, the coating layer 13 exposed on the inner surface of the sewer pipe is peeled off from the base material layer 11.

In the above, after the base layer 11 is cured, the coating layer 1
When removing 3, it is sufficient to hold the end of the coating layer 13 with your hand and pull it.In this way, the coating layer 13 will be peeled off over the entire inner surface of the base material layer 11 due to the cracks 2. Since it is not adhered, it can be easily peeled off.
In addition, when forming the lining material 1 of sheet material into a tube shape, as shown in FIG. If the end portions 13a of the covering layer 13 that have been bonded are overlapped without being attached to the base material layer 11, when the covering layer 13 is peeled off, the end portions 13a of the covering layer 13 that are not adhered to the base material layer 11 will be removed.
It is convenient because it can be held and pulled by hand. In particular, since the non-adhesive portion is continuous in the longitudinal direction, removability is improved. Furthermore, if the coating layer 12 laminated on the outer surface of the base material layer 11 that is in close contact with a lining surface such as a wall surface is made white or silver, when the uncured base material layer 11 is cured by irradiating ultraviolet rays, Since the light passing through the base layer 11 is reflected by the coating layer 12, the base layer 11
It has the advantage of quickly and uniformly curing.
Furthermore, if the coating layer 12 laminated on the outer surface of the base material layer 11 is made of silver paper, not only will it be useful for the quick and uniform hardening of the base material layer 11 due to the above-mentioned light reflection, but also the coating layer 12 Since the material is light-opaque, the base material layer 11 will not be easily hardened by sunlight even if the lining material is handled outdoors.

When constructing the lining material 1 on the lining surface, which is the wall surface of a non-cylindrical structure such as a tunnel, the sheet-like lining material 1 is inserted into the crack 2.
The coating layer 13 having the above-mentioned coating layer 13 is attached on the side opposite to the wall surface (lining surface), the base material layer 11 is cured by ultraviolet irradiation, and then the coating layer 13 exposed inside the tunnel is peeled off.

[Effect of idea]

As described above, in the lining material of the present invention, among the coating layers laminated on the base material layer, the coating layer on the side opposite to the lining surface has a large number of cracks, so that the coating layer is laminated on the base material layer. In addition, defoaming is easily carried out through the cracks, and the cracks prevent the coating layer from fully adhering to the base material layer, so the application of the lining material does not allow the coating layer to adhere completely to the base material layer. It has the advantage that the exposed coating layer can be easily peeled off after it has hardened.

In the lining material of the present invention, the cracks formed in the coating layer laminated on one side of the base layer are for defoaming when the coating layer is laminated and for curing the coating layer, as described above. Although it is useful for facilitating the work of peeling off from the base material layer, the arrangement of the cracks is not limited to that shown in Figs. 1 and 2. It goes without saying that you can leave it alone.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a broken lining material according to an embodiment of the present invention, Fig. 2 is a perspective view showing a modified example of the same lining material, and Fig. 3 shows a sheet-like lining material shaped into a tube. Fig. 4 is a cross-sectional view showing the overlapping part of the base material layer and the edge of the coating layer when the sheet-like lining material is made into a tube shape, and Fig. 5 is the lower part. A sectional view showing a case where a lining material is applied to the inner surface of a water pipe, FIG. 6 is an enlarged sectional view of the main part of FIG. 5, and FIG. 7 is a sectional view of a conventional lining material. 1... Lining material, 11... Base material layer, 13...
...Covering layer, 2...Tear.

Claims (1)

[Scope of utility model registration request] A lining material comprising an uncured sheet or tube made of an ultraviolet curable synthetic resin as a base layer, and a film-like coating layer laminated on both sides of this base layer, which is laminated on the base layer. A lining material characterized in that a large number of cracks are formed in the coating layer on the side opposite to the lining surface.