JPH09267448A - Interior sheet for water tank or reservior - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perfectly prevent the leak of water from a water tank or a basin over along period of time by a simple method by forming an interior sheet fromsheet consisting of a fiber base fabric impregnated with a polymer and a coating layer composed of a polymer compatible with the polymer infiltrated into one surface or both surface of the base fabric. SOLUTION: Soft polyvinyl chloride films are superposed on the upper and rear surfaces of a polyvinyl chloride impregnated fiber base fabric and the whole is subjected to hot press treatment at predetermined temp. under predetermined pressure to form an impregnated laminated sheet wherein coating layers of soft polyvinyl chloride are provided on both surfaces of the polyvinyl chloride impregnated fiber base fabric. This impregnated laminated sheet is cur into a proper size to form a plurality of cut pieces and the end parts of the cur pieces are mutually overlapped to be welded by a high frequency welder to form an interior sheet A for water tank having a predetermined structure and a predetermined dimension. This interior sheet A is inserted into the water tank 1 and fixed to the water tank by engaging the recessed engaging parts and protruding engaging parts of surface fasteners and, thereafter, water is injected into the water tank from the opening part 15 of the sheet A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interior sheet for a water tank or a reservoir, and a water tank or reservoir having the interior sheet mounted therein. More specifically, the present invention relates to an interior sheet for a water tank or a reservoir, which when installed inside a water tank or a reservoir, can completely and easily prevent water leakage from the water tank or the reservoir, and such an interior sheet. Regarding aquariums or reservoirs fitted with seats.

[0002]

2. Description of the Related Art Concrete water tanks have been widely used as water tanks, fire tanks, fish farming tanks, miscellaneous drainage tanks, and the like. As a method of installing a concrete water tank on-site, a method of constructing a water tank made of concrete at the factory and then bringing it into the site and installing it, or a method of constructing a water tank by directly placing concrete at the site Etc. have been conventionally adopted. In addition, concrete reservoirs, fire prevention ponds, aquaculture ponds, miscellaneous drainage ponds, etc. have been commonly used as similar or similar to concrete tanks. The method of directly constructing and constructing is generally adopted. In any of these cases, a method of subjecting the inside of the water tank or the pond to a caulking treatment, a method of coating with a waterproof coating, etc. are generally widely adopted in order to prevent water leakage from the water tank or the pond or to stop the water.

However, in a water tank or a pond made of concrete, the concrete is cracked or damaged due to drying shrinkage of concrete, earthquake, ground subsidence, erosion, aging, etc.
Distortion and deformation are likely to occur, and in such cases, it is extremely difficult to completely prevent water leakage from the water tank or pond when using the above-mentioned conventional caulking treatment or waterproof paint treatment. There is a problem that the amount of stored liquid such as water decreases, and that the liquid such as water leaking from an aquarium or a pond causes environmental pollution.

Therefore, for the purpose of preventing water leakage from a concrete water tank or pond, an inner bag made of a plastic sheet is attached to the inside of the water tank or pond along the inner wall of the water tank or pond, and the inside of the plastic sheet inner bag is attached. Some have tried to store water in. However, the inner bag made of plastic sheet is not sufficient in strength and durability,
If it is damaged when it is installed inside a concrete water tank or pond, or if it is deteriorated or damaged within a short period of time when it is used by being installed inside a water tank or pond, its waterproofing ability and water leakage prevention ability are short-term. It has the drawback of being easily lost in the meantime. Particularly, in a water tank or a pond made of concrete, the alkaline content eluted from the concrete makes the water in the water tank or the pond alkaline, so that the deterioration of the plastic sheet inner bag is further promoted.

Leakage from water tanks and ponds is not limited to concrete water tanks and ponds;
Similar problems occur in aquariums and ponds made of wood, plastic, glass, soil, etc. Even in these aquariums and ponds, a simple method and stable prevention of water leakage over a long period of time Possible measures are desired.

[0006]

DISCLOSURE OF THE INVENTION The object of the present invention is to easily prevent water leakage from concrete water tanks and ponds, as well as water tanks and ponds formed from metal such as wood and steel, plastic, glass, and soil. In this way, it is to provide measures that can be prevented completely and over a long period of time.

[0007]

The present inventors have made various studies to achieve the above object. Then, in the above-mentioned conventional technique in which an inner bag made of a plastic sheet is attached to the inside of a water tank or a pond, if the inner bag is not made of a sheet made of plastic only, but made of a fiber-reinforced plastic sheet, it is durable. I thought that it would be possible to prevent leakage from water tanks and ponds over a long period of time by improving the property. Then, based on such an idea, a plastic film such as polyvinyl chloride is attached to the surface of the fiber base fabric to make a laminated sheet, the laminated sheet is cut, and the cut pieces are fitted to the inner shape of the water tank. An experiment was carried out in which an inner bag was prepared by welding at the end of the slab, and the inner bag was attached to the inside of the water tank to investigate the presence or absence of water leakage.

However, as a result of such an experiment, there is a problem that water contained inside the inner bag leaks out to the outside of the inner bag little by little and water accumulates between the outer side of the inner bag and the inner wall of the water tank. Therefore, if there are cracks in the wall of the aquarium, the water that collects between the inner bag and the inner wall of the aquarium leaks out of the aquarium, and even if such an inner bag is installed inside the aquarium, water will leak. It has been found that the above cannot be completely prevented. And
As a result of further detailed investigation on the cause thereof, as shown in FIG. 1 (FIG. 1 is a view showing the case where the water tank 1 equipped with the inner bag A is viewed from above), the inner bag A is configured. The fibrous base cloth 4 of the cut piece 2 of the laminated sheet is exposed at the welding end 3 of the cut sheet 2 of the laminated sheet, and the water contained in the inner bag along the exposed portion is capillarity or the like to cause the laminated sheet. Of the cut sheet 2 and through the layer of the fibrous base cloth 4 inside the cut piece 2 and leaks out from another welding end 3 ′ of the cut piece 2 of the laminated sheet constituting the inner bag A, and the outside of the inner bag A and the water tank 1 It became clear that water was accumulated in a slight space 5 between the inner wall and the inner wall.

Therefore, the present inventors have made further studies based on the above findings, and as a sheet for making an inner bag, the fiber base cloth is impregnated with the polymer, and the polymer is An impregnated laminated sheet is formed by providing a coating layer made of a polymer having an affinity with the polymer impregnated in the fiber base cloth on one or both sides of the impregnated fiber base cloth to form an impregnated laminated sheet, and using the impregnated laminate sheet, an inner bag Was prepared and mounted inside a water tank or pond, even if water was put inside the inner bag, the infiltration of water at the joint end of the impregnated laminated sheet cutting pieces that compose the inner bag was prevented. The present invention was completed based on such findings by finding that water does not leak to the outside of the inner bag.

That is, according to the present invention, a water tank produced by using an impregnated laminated sheet having a polymer-impregnated fiber base cloth on one or both sides of which a coating layer made of a polymer having an affinity for the impregnated polymer is provided. The present invention is a water tank or a reservoir characterized in that the above-mentioned interior sheet is mounted inside.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. In the present invention, the type, shape, scale, material, etc. of the water tank and the reservoir for mounting the interior sheet of the present invention are not particularly limited, and for any of the water tank (including the tank) and the reservoir that need to prevent water leakage. Can also be applied. Although not limited, the interior sheet of the present invention, for example, drinking water, industrial water, fire protection water, agricultural water, miscellaneous drainage,
It can be used for an aquarium or pond (that is, a reservoir) for storing water such as fish culture water, and may be used for a swimming pool or the like in some cases. In that case,
The water stored in the water tank or the reservoir does not need to be composed of only water, and may of course contain a liquid other than water, a water-soluble component, a water-insoluble component, a solid substance and the like.

The fiber base cloth used for the impregnated laminated sheet for the interior sheet may be any base cloth made of fibers having excellent water resistance, such as synthetic fibers, natural fibers, semi-synthetic fibers, artificial fibers, and the like. It may be produced from any of two or three or more mixed fibers, but those formed from fibers having low water absorption are preferable, and polypropylene fibers, polyethylene fibers, vinylon, polyester fibers, polyamide fibers, poly fibers A base fabric formed of synthetic fibers such as vinylidene chloride fibers, acrylic fibers, polyurethane fibers, and mixed fibers thereof is preferable. Among them, in the case of interior sheets used for concrete aquariums and reservoirs, it is desirable that the fiber base fabric has excellent alkali resistance, such as vinylon, polypropylene fiber, polyethylene fiber, or a mixture or composite fiber thereof. It is desirable to use a woven fiber substrate. The thickness of the fibers forming the fiber base fabric is not particularly limited. Also,
The fiber base fabric may be made of any of spun yarn, filament yarn, short fibers, and the like.

The fiber base cloth used for the impregnated laminated sheet for the interior sheet may be in any form such as woven cloth, knitted cloth, non-woven cloth and net. Among them, when the woven fabric is used as the fiber base fabric, the dimensional change of the impregnated laminated sheet becomes small and the impregnated laminated sheet having a predetermined strength is easily manufactured.

A polymer for impregnating a fibrous base cloth in an impregnated laminated sheet (hereinafter referred to simply as "impregnation polymer") from the viewpoints of ease of manufacturing the interior sheet and mounting of the interior sheet to a water tank or a reservoir. It is preferable to use a polymer exhibiting flexibility at room temperature, particularly preferably a thermoplastic polymer exhibiting flexibility at room temperature. Examples of the impregnating polymer, polyvinyl chloride, vinyl chloride copolymer,
Polyethylene, ethylene-vinyl acetate copolymer, ethylene-propylene copolymer, polypropylene, polyvinyl alcohol, polyacrylonitrile, acrylic resin, thermoplastic polyester resin, polyamide, thermoplastic elastomer (polystyrene thermoplastic elastomer, polyolefin thermoplastic elastomer) , Thermoplastic polyurethane elastomers, thermoplastic polyester elastomers, thermoplastic polyamide elastomers, etc., and these polymers may be used alone or in combination of two or more. And among the above-mentioned polymers, polyvinyl chloride, vinyl chloride copolymer, polyethylene, ethylene-vinyl acetate copolymer, ethylene-
Propylene copolymer, polyvinyl alcohol, acrylic resin, polyurethane and the like are preferable from the viewpoint of handleability, economy, alkali resistance and the like. In particular, in an impregnated laminated sheet for an interior sheet used for a water tank or a reservoir made of concrete, it is excellent in alkali resistance to use polyvinyl chloride, a vinyl chloride copolymer, or an ethylene-vinyl acetate copolymer as a polymer for impregnation. It is preferable from the point of being. In that case,
The above-mentioned impregnating polymer is in the form of a polymer composition containing other components such as a plasticizer, a stabilizer, an ultraviolet absorber, an antioxidant, a colorant, and an inorganic filler, if necessary. Good. However, as the impregnating polymer, a thermosetting polymer or rubber having an affinity for the coating polymer may be used in some cases.

Further, as a polymer for forming a coating layer on one or both surfaces of a fiber base cloth impregnated with a polymer (hereinafter sometimes referred to as "coating polymer"), a polymer impregnated into a fiber base cloth is used. It is necessary to use one that has an affinity with. When the affinity of the coating polymer for the impregnating polymer is low, adhesion and adhesion between the fiber base cloth impregnated with the impregnating polymer and the coating polymer will be poor, resulting in poor water leakage resistance. An excellent impregnated laminated sheet and interior sheet cannot be obtained. In general, it is preferable to use the same polymer as the impregnating polymer and the coating polymer, or to use the same type of polymer because of high affinity. Although not limited, when polyvinyl chloride, a vinyl chloride-based copolymer or the like is used as the impregnating polymer, one or more of the polyvinyl chloride and the vinyl chloride-based copolymer may be used. Preferably used as the impregnating polymer, for example, polyethylene, ethylene-vinyl acetate copolymer, and when ethylene-propylene copolymer is used, the coating polymer is polyethylene, ethylene-vinyl acetate copolymer, ethylene-propylene. Copolymer, one of other olefin polymers
One or two or more of them are preferably used. For example, when thermoplastic polyurethane, acrylic resin or thermoplastic polyester resin is used as the impregnating polymer, thermoplastic polyurethane, acrylic resin or thermoplastic polyester resin is used as the coating polymer, respectively. It is preferably used.
The coating polymer can also be used in the form of a polymer composition containing other additives, components, other polymers, etc., if necessary. Further, in some cases, as the coating polymer, it is possible to use a thermosetting polymer or rubber having an affinity with the impregnating polymer.

The polymer or polymer composition for impregnation and coating is suitable for each water tank or reservoir in consideration of the properties and uses of water stored in the water tank or reservoir. It is necessary to select and use, for example, when using in a water tank for drinking water, it is necessary to select and use a polymer or polymer composition which does not contain a toxic component and is excellent in safety. The above-mentioned polyvinyl chloride,
Vinyl chloride copolymer, polyethylene, ethylene-vinyl acetate copolymer, ethylene-propylene copolymer, thermoplastic polyurethane, acrylic resin, or a composition thereof has high safety, and is an interior sheet for drinking water tanks. It can be used as an impregnating polymer and a coating polymer in the impregnated laminated sheet used.

In the impregnated laminated sheet, the coating polymer layer may be formed on only one surface of the fiber base fabric impregnated with the polymer, or the coating polymer layer may be formed on both surfaces. , Especially because the coating polymer layer is formed on both sides, the water resistance of the interior sheet formed from the impregnated laminated sheet is further improved, and the impregnated laminated sheet conforms to the internal shape of the water tank or reservoir. This is preferable because the weldability and workability when the formed interior sheet is formed by welding are improved. The thickness of the layer of the coating polymer in the impregnated laminated sheet is not particularly limited and can be adjusted depending on the type and scale of the water tank or reservoir in which it is used, but it is generally about 0.
It is preferably about 05 to 1 mm, and about 0.1 to 0.
More preferably, it is about 7 mm.

The thickness of the impregnated laminated sheet for the interior sheet can be adjusted according to the type and scale of the water tank or reservoir in which it is used, but generally the total thickness of the impregnated laminated sheet is about 0.3 to 3 mm. Is preferably about 0.4
More preferably, it is about 2.0 mm, and 0.5 to 1
More preferably, it is about mm. If the total thickness of the impregnated laminated sheet is less than 0.3 mm, the mechanical strength and the like of the interior sheet formed from the impregnated laminated sheet tends to be small, and further, the water leakage resistance tends to be insufficient, and the durability and durability It becomes difficult to obtain an interior sheet with excellent water leakage resistance. On the other hand, if the total thickness of the impregnated laminated sheet is larger than 3 mm, the workability when manufacturing an interior sheet that conforms to the internal shape of the water tank or reservoir, such as by welding, tends to be poor,
Forming an impregnated laminated sheet It becomes difficult to perform the spreading work when mounting the interior sheet inside a water tank or reservoir.

The method for producing the impregnated laminated sheet is not particularly limited, and the fibrous base cloth is uniformly impregnated with the impregnating polymer, and one or both surfaces of the polymer-impregnated fibrous base cloth is coated with the covering polymer. Any method may be used as long as it can form an impregnated laminated sheet in which the layers are densely formed. The method for producing the impregnated laminated sheet includes, but is not limited to, for example, by immersing a fiber base cloth in a liquid material such as a molten solution of an impregnating polymer or a paste, draining it, and then using a heat roll. A method for producing an impregnated laminated sheet by heat-treating to solidify the resin, and then melt-laminating a coating polymer having an affinity for the impregnating polymer on one or both sides of the fiber base fabric, or coating and laminating by another method; A liquid material such as a melt or paste of an impregnating polymer is sprayed or applied on the fiber base cloth and then pressed by a roll or the like to allow the melt or paste to penetrate into the fiber base cloth, and then the fiber base cloth. A method for producing an impregnated laminated sheet by melt-laminating a coating polymer having an affinity for the impregnating polymer on one or both sides of the cloth, and laminating by another method to form an impregnated laminated sheet; While the impregnating polymer that has been impregnated or permeated into the inside is still in a liquid state, a solid film or sheet made of the covering polymer is laminated on one or both sides of the film and pressed and integrated for complete impregnation. Method for producing a laminated sheet; a fiber base cloth is impregnated with a liquid-state polymer such as a melt or a paste, and one or both surfaces of the fiber base cloth is additionally layered with the polymer to form a surface. A method of directly forming a coating layer by the extra polymer present in the above;

In carrying out the above-mentioned methods (1) to (3), when a coating layer of the coating polymer is formed on both sides of the fiber base cloth impregnated with the impregnating polymer, the coating layers on both sides of the fiber base cloth are formed. The formation may be performed simultaneously, or the coating layer may be formed on one surface and then the coating layer may be formed on the remaining surface.

Then, the above-mentioned impregnated laminated sheet is used to prepare an interior sheet to be mounted inside a water tank or a reservoir.
The method for producing the interior sheet is not particularly limited, and any method may be used as long as the water or liquid contained in the interior sheet does not leak outside. Generally, for example, the above-mentioned impregnated laminated sheet is cut into pieces of an appropriate size, and the cut pieces are joined according to the size and shape of the water tank or reservoir, and a plurality of pieces are joined to form a bag or other shape. An interior sheet can be obtained by producing the above. At that time, as a method of joining the cut pieces of the impregnated laminated sheet, any joining method that does not cause water leakage from the joined portion can be adopted, for example, welding processing, adhesion processing with a water-resistant adhesive, etc. are adopted. it can. Among them, when a thermoplastic polymer or a composition thereof is used as the coating polymer on the surface of the impregnated laminated sheet, a joining method by welding is preferably used, whereby an interior sheet that does not leak smoothly and It can be easily manufactured. When manufacturing the interior sheet, the cut impregnated laminated sheets are joined by a joining method involving the formation of needle holes or other holes, such as sewing or stapling, or by a joining method in which a non-joint portion exists. Doing so is not suitable as it will cause water leakage from the holes and non-bonded parts.

The method of welding the cut pieces of the impregnated laminated sheet is not particularly limited, and a welding method which is commonly used for welding plastics can be adopted. Examples of the method include high frequency welder welding, ultrasonic welding, hot air welding, hot roller welding, and Welding methods such as impulse welding can be mentioned, and among these, high frequency welder welding and hot air welding are preferably used.

The welding of the cut pieces of the impregnated laminated sheet when producing the interior sheet is usually performed by welding the ends of the cut pieces. The joining structure at the end in that case is not particularly limited, and may be any joining structure that does not cause water leakage, and examples thereof include joining structures as shown in FIGS. 2 (a) to 2 (d). In addition, in FIG. 2, 6 and 6'indicate respective cut pieces obtained by cutting the impregnated laminated sheet B. Among them, the joining structures of (a) and (b) of FIG. 2 are preferable from the viewpoint of easy joining, and (a)
Is more preferable. When the joining structure as shown in FIGS. 2 (a) and 2 (b) is adopted, the impregnated laminated sheet B, at the cut ends of the cut pieces 6, 6 '.
Although a part of the fiber base cloth layers 7 and 7'included in B'is exposed, the fiber base cloth layers 7 and 7'are impregnated with a polymer so that absorption of water or the like due to capillarity does not occur. Therefore, there is a problem that water such as water leaks to the outside of the interior sheet from the cut ends of the cutting pieces 6 and 6'when water in the water tank or reservoir penetrates and is transmitted inside the impregnated laminated sheet. Does not happen.

In the present invention, the shape and size of the interior sheet produced from the impregnated laminated sheet is not particularly limited, and may be determined according to the shape and size of the water tank or reservoir in which the interior sheet is mounted. Without any limitation,
For example, when installing the interior sheet in a rectangular water tank,
The inner sheet is preferably formed into a rectangular bag shape in conformity with the inner shape and size of the water tank, and when the water tank is cylindrical, the inner sheet may be formed into a bottomed cylindrical shape according to the inner shape. Further, in the case of an interior sheet to be mounted on a water tank or a reservoir having an uneven portion inside, the interior sheet may also have a shape and dimensions having an uneven portion according to the internal shape and dimensions of the water tank or the reservoir. Also, depending on the structure and application of the water tank or reservoir to which the interior seat is attached, the interior seat attached to the inside may have an open top structure,
It may be an upper closed type structure having a water inlet / outlet port, or another structure.

Further, in order to firmly and stably mount the interior sheet on the inside of the water tank or the reservoir without slipping off, moving or the like, the interior sheet is fitted with an appropriate fixing means to the inner wall of the tank or the reservoir, It is desirable to fix it to the inner bottom or opening. The fixing method at that time must be a method that does not cause water leakage from the fixed portion, and a fixing method involving perforation of the interior sheet, such as a fixing method using bolts and nuts, is inappropriate. . However, it does not matter if a part of the interior seat that extends outside the upper part of the water tank or reservoir is fixed outside of the water tank or reservoir without water using a fixing method that involves drilling holes such as bolts and nuts. . The interior sheet may be adhered and fixed to the water tank or the inner wall of the reservoir with an adhesive, but it is preferable to use a detachable fixing means because the interior sheet can be easily replaced when it becomes old.

As a method of detachably fixing the interior sheet to the inner wall or the inner bottom of the water tank or the reservoir, a fixing method using a surface fastener can be mentioned. When the interior sheet is fixed to the inside of the water tank or the reservoir by the hook-and-loop fastener, the interior sheet can be smoothly fixed and attached to the inside of the water tank or the reservoir without causing water leakage at the fixed portion. When using a surface fastener, the convex engaging portion of the surface fastener is attached to the outer portion of the interior sheet, while the concave engaging portion of the surface fastener is attached to the inner wall of the aquarium or reservoir to engage them. Even if it is fixed, the concave engagement part of the surface fastener is attached to the outer part of the interior sheet, while the convex engagement part of the surface fastener is attached to the inner wall of the water tank or reservoir, and both are engaged and fixed. Alternatively, the former two may be combined and fixed. In that case, the type of the surface fastener and the structure and shape of the concave engaging portion and the convex engaging portion in the surface fastener are not particularly limited, and the interior sheet can be stably and firmly fixed inside the water tank or the reservoir. Any material can be used.

Although not limited in any way, as a specific method for detachably fixing the interior sheet to the inner wall or the inner bottom of the water tank, for example, as shown in FIG. 3, a surface fastener is attached to the inner wall of the water tank 1. The concave engaging portion 8a (or the convex engaging portion 8b) of No. 8 is attached by an adhesive or other fixing means, while the convex engaging portion 8b of the surface fastener 8 is provided at a corresponding position on the outside of the interior sheet A. (Or the concave engaging portion 8a) is attached by an appropriate method such as an adhesive or welding, and after the interior sheet A is placed inside the water tank 1, the concave engaging portion 8a of the surface fastener 8 and the convex engaging portion 8a are arranged. By engaging the joint portions 8b with each other, the interior sheet A can be stably fixed in the water tank 1. At this time, the number of surface fasteners to be used, the size of each surface fastener (the area of the engaging portion), the position where the surface fastener is attached, etc. are not particularly limited and can be selected according to each situation.

[0028]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto.

<< Test Example 1 >> [Water Leakage Resistance Test] (1) Production of Impregnated Laminated Sheet : (i) Three vinylon multifilament yarns (1000 denier / 150 filaments) were aligned to form one yarn. Using this, weaving was performed to produce a vinylon plain woven fabric (weft 20 / inch, warp 18 / inch). (Ii) The vinylon plain woven fabric produced in (i) above is mixed with polyvinyl chloride paste (average degree of polymerization: 800, amount of plasticizer: 10).
0 parts by weight / 100 parts by weight of polyvinyl chloride),
After draining, impregnation with a heat roller at about 170 ° C and heat treatment to make the impregnation amount of polyvinyl chloride paste about 200g.
A polyvinyl chloride-impregnated fiber base cloth, which is a plain woven fabric of 1 / m ² is manufactured, and is formed into an elliptical shape (long side 50) along the weft of the fiber base cloth.
cm, short side 30 cm). (Iii) Polyvinyl chloride 100 having an average degree of polymerization of 2300
Parts by weight, nitrile rubber 5 parts by weight, polyester plasticizer 70 parts by weight, epoxy soybean oil about 3 parts by weight, stabilizer about 2
Using a polyvinyl chloride resin composition comprising 1 part by weight of a polyvinyl chloride resin and about 1 part by weight of an ultraviolet absorber, calender molding is carried out by a conventional method to produce a non-toxic soft polyvinyl chloride film having a thickness of 0.23 mm. To oval (long side 5
Two cut pieces having a length of 0 cm and a short side of 30 cm were prepared. (Iv) On the front and back surfaces of the oval cut piece of the polyvinyl chloride-impregnated fiber base fabric produced in (ii) above, the elliptical cut piece of the soft polyvinyl chloride film produced in (iii) is overlaid, An elliptical impregnated laminated sheet having a polyvinyl chloride-impregnated fiber base cloth and a soft polyvinyl chloride coating layer on both surfaces of the polyvinyl chloride-impregnated fiber base fabric was produced by hot pressing for 30 seconds at a temperature of 170 ° C. and a pressure of 20 kgf / cm ² . .

(2) Water Leakage Resistance Test of Impregnated Laminated Sheet : (i) The elliptical impregnated laminated sheet produced in (iv) of (1) above was cut along the weft warp of the fiber base fabric, Figure 4
A test piece C having a square hole 9 in the center was produced having the shape and dimensions shown in FIG. (Ii) The test piece C of the impregnated laminated sheet produced in the above (i) was placed in such a manner that the square hole 9 was located at the center.
Pressurized liquid tightness tester D (water pressure resistance tester) having the structure shown in
(Manufactured by Kuraray Plastics Co., Ltd .; pressurized liquid tightness tester D, space 10 has an inner diameter of 50 mm and a length of 200 mm)
1 and the lower device 11 ′ between the circular brim 12 and the brim 12 ′, and then 50 water is poured from the inlet 13 into the space 10.
It was placed at a depth of mm. (Iii) Next, 0.5 kg of pressurized air from the inlet 13
It was introduced and pressurized so as to have a pressure of f / cm ² , and the time taken for the water to drop from the end portion 14 of the test piece C was measured. The results are shown in Table 1 below.

(3) of laminated sheet (non-impregnated laminated sheet)
Production : On the front and back surfaces of the vinylon plain weave produced in (i) of (1) above, the elliptical cut pieces of the soft polyvinyl chloride film produced in the same manner as in (iii) of (1) above are overlaid. After heat-pressing for 30 seconds under the conditions of a temperature of 170 ° C. and a pressure of 20 kgf / cm ² , plain vinyl woven fabrics are cut into the same elliptical shape, and both sides of the fiber base cloth are made of soft polyvinyl chloride. An elliptical laminated sheet having a coating layer (non-impregnated laminated sheet) was produced.

(4) of the laminated sheet (non-impregnated laminated sheet)
Leakage resistance test : (i) The elliptical laminated sheet produced in (3) above
A test piece C cut along the weft warp of the fiber base fabric and having a square hole 9 in the center, having the shape and dimensions shown in FIG.
Was produced. (Ii) The pressurized liquid tightness test shown in FIG. 5, which is the same as that used in (2) above, with the test piece C of the laminated sheet prepared in (i) above so that the square hole 9 is located at the center. Machine D
The upper device 11 and the lower device 11 ′ of the device are sandwiched between the circular brims 12 and 12 ′ of the upper device 11 and the lower device 11 ′, and then the space 1 from the inlet 13
0 into the water at a depth of 50 mm, pressurized air was introduced from the inlet 13 so as to have a pressure of 0.5 kgf / cm ² , and pressurized, until water dripped from the end 14 of the test piece C. When the time was measured, it was as shown in Table 1 below.

[0033]

[Table 1] Time from the end 14 until the water drops Impregnated laminated sheet No dripping 900 seconds after air pressurization Laminated sheet (non-impregnated laminated sheet) Start dripping 210 seconds after air pressurization

From the results shown in Table 1 above, in the case of an impregnated laminated sheet having a coating layer made of a polymer having an affinity for the impregnated polymer on both surfaces of a fiber base fabric impregnated with the polymer, after air pressurization. Even after 900 seconds, there is no infiltration of water into the fiber base fabric layer exposed in the cut portion of the test piece C of the impregnated laminated sheet (the portion of the rectangular hole 9 of the test piece C), and therefore no water leakage occurs. On the other hand, in the laminated sheet produced without impregnating the fiber base cloth with the polymer, water began to drip from the end portion 14 of the test piece 210 seconds after the pressurization with air, and the water leakage resistance was poor. You can see that

Example 1 (1) After the same vinylon plain weave (weft 20 yarns / inch, warp 18 yarns / inch) as in (i) of (1) of Reference Example 1 was produced, this plain weave fabric was used. Polyvinyl chloride was impregnated in the same manner as in (1) (ii) of Reference Example 1 to produce a polyvinyl chloride-impregnated fiber base fabric. (2) In addition to (1) above, (ii) of (1) of Reference Example 1
Using the same polyvinyl chloride resin composition used in i), a non-toxic soft polyvinyl chloride film having a thickness of 0.23 mm was produced. (3) The soft polyvinyl chloride film produced in (2) above is laminated on the front and back surfaces of the polyvinyl chloride-impregnated fiber base fabric produced in (1) above, and the temperature is 170 ° C. and the pressure is 20 kgf / c.
A hot press treatment was carried out for 30 seconds under the condition of m ² to produce an impregnated laminated sheet (width 50 cm) having a polyvinyl chloride-impregnated fiber base fabric on both sides of which soft polyvinyl chloride coating layers were formed.

(4) The impregnated laminated sheet produced in the above (3) is cut into an appropriate size to form a plurality of cut pieces, and the cut pieces are piled up (overlap width: 50 mm) at a high frequency. Welding was performed using a welder to produce an interior sheet A for a water tank having a structure and dimensions shown in FIG. (5) Concave engagement of a plurality of surface fasteners 8 [“Magic Hard KDA004” manufactured by Kuraray Co., Ltd .; area of one surface fastener 100 cm ² ) at predetermined positions outside the interior sheet A produced in (4) above. The part 8a was attached by welding. (6) On the other hand, the internal shape and size of the concrete water tank 1 (wall and bottom of the water tank) shown in (b) of FIG. 6 are almost the same as the interior sheet A produced in (4) above. The convex engaging portion 8b of the above-described surface fastener 8 was attached to a predetermined position of the inner wall, the inner bottom of the ceiling portion having a thickness of about 30 cm), the inner bottom, and the ceiling portion with an adhesive.

(7) Interior having the concave engaging portion 8a of the surface fastener prepared in (5) above inside the water tank 1 to which the convex engaging portion 8b of the surface fastener prepared in (6) above is attached Insert the sheet A into the water tank 1 and engage the concave engaging portion 8a and the convex engaging portion 8b of the surface fastener 8 to
As shown in FIG. 6B, the inner sheet A is placed in the water tank 1.
Was fixed to. (7) Next, water was added from the opening 15 of the interior sheet A to a nearly full state, and a water leakage test was conducted for 12 months. Water leakage on the outside of the wall, bottom and ceiling of the water tank A Was not recognized at all.

[0038]

EFFECTS OF THE INVENTION Interior sheet of the present invention prepared by using an impregnated laminated sheet having a coating layer made of a polymer having an affinity for the impregnated polymer on one or both sides of a polymer-impregnated fiber base fabric. When using, the water leakage from the water tank or the reservoir can be prevented for a long period of time by a very simple method of mounting the interior sheet on the water tank or the reservoir. Then, according to the present invention, it is possible to easily manufacture an interior sheet having a shape and size suitable for the internal shape of the water tank or the reservoir. In particular, when a coating layer on one or both sides of an impregnated laminated sheet for an interior sheet is formed from a thermoplastic polymer or a composition thereof, pieces of the impregnated laminated sheet are joined by welding to have excellent leakage resistance. The interior sheet can be easily manufactured.

Further, the interior sheet of the present invention is made of concrete, metal such as steel, wood, plastic,
It can be effectively used to prevent water leaks from any of water tanks and reservoirs made of glass, water tanks and reservoirs formed from soil, and is particularly prone to leakage due to cracks, damage, erosion by alkalis, etc. It can be effectively used for concrete tanks and reservoirs. In the case of the present invention, the type of fiber base cloth in the impregnated laminated sheet constituting the interior sheet according to the type of water or liquid stored in the water tank or reservoir in which the interior sheet is mounted, the polymer for impregnation and the coating By selecting the type of polymer and the like, it is possible to produce an interior sheet suitable for each water tank or reservoir. Further, in the present invention, when fixing the interior sheet to the inside of the water tank or the reservoir with a hook-and-loop fastener, it is possible to attach the interior sheet, the tank or the reservoir extremely easily and firmly without causing water leakage. In addition, the interior seat can be easily replaced or removed.

[Brief description of drawings]

FIG. 1 is a view of a water tank in which an inner bag A made of a laminated sheet composed of a fiber base cloth not impregnated with a polymer and a polymer coating layer is mounted, as seen from above.

FIG. 2 is a diagram showing an example of a joining structure when joining cut pieces of an impregnated laminated sheet in producing an interior sheet.

FIG. 3 is a diagram showing an example in which an interior sheet is fixed to an inner wall of a water tank by using a surface fastener.

FIG. 4 is a diagram showing the shape and dimensions of a test piece C used for conducting a water leakage resistance test.

FIG. 5 is a view showing a structure of a pressurized liquid tightness tester used for conducting a water leakage resistance test.

FIG. 6 is a diagram showing an example of an interior sheet of the present invention.

[Explanation of symbols]

 A Interior sheet (inner bag) B Impregnated laminated sheet B'Impregnated laminated sheet C Test piece D Pressurized liquid tightness tester 1 Water tank 2 Cutting piece 3 Welding end 3'Welding end 4 Fiber base cloth 5 Space 6 Impregnated laminated sheet Cut piece 6'Impregnated laminated sheet cut piece 7 Fiber base cloth layer 7'Fiber base cloth layer 8 Surface fastener 8a Concave engagement portion of surface fastener 8b Convex engagement portion of surface fastener 9 Hole of test piece C 10 Space Part 11 Upper device of pressurized liquid tightness tester 11 'Lower device of pressurized liquid tightness tester 12 Collar 12' Collar 13 Inlet 14 End of test piece C 15 Opening of interior sheet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hatazumi, 225, Yodohoncho, Fushimi-ku, Kyoto, Kyoto Prefecture, Kakon Co., Ltd. (72) Inventor, Yoshiaki Shiraishi, 225, Yonhoncho, Fushimi-ku, Kyoto, Kyoto Prefecture (72) Inventor Sumio Maejima 6-28-12 Minamioi, Shinagawa-ku, Tokyo National Marine Plastics Co., Ltd. (72) Inventor Yutaka Takahashi 4330 Omotesa, Tarui-cho, Fuwa-gun, Gifu Prefecture Kuraray Plastics Co., Ltd. (72) Inventor Kenji Matsumoto 1-1239 Umeda, Kita-ku, Osaka-shi, Osaka Prefecture Kuraray Co., Ltd. (72) Hidefumi Sumiyoshi 1-12-39 Umeda, Kita-ku, Osaka City, Osaka

Claims (7)

[Claims] 1. A water tank or a reservoir prepared by using an impregnated laminated sheet having a coating layer made of a polymer having an affinity for the impregnated polymer on one or both sides of a fiber base fabric impregnated with the polymer. Interior sheet. 2. The polymer impregnated in the fiber base cloth is a thermoplastic polymer, and the coating layer provided on one or both sides of the fiber base cloth has an affinity with the thermoplastic polymer impregnated in the fiber base cloth. The interior sheet according to claim 1, which comprises the thermoplastic polymer of. 3. The interior sheet according to claim 1 or 2, which is made to have the same or substantially the same shape as the internal shape of the water tank or reservoir. 4. The interior sheet according to any one of claims 1 to 3, which is produced by welding the pieces of the impregnated laminated sheet to have the same or substantially the same shape as the internal shape of the water tank or the reservoir. 5. A water tank or a reservoir, wherein the interior sheet according to any one of claims 1 to 4 is mounted inside. 6. The water tank or reservoir according to claim 5, wherein the interior sheet is mounted inside by fixing means that does not involve punching of the interior sheet. 7. The water tank or reservoir according to claim 6, wherein the interior sheet is mounted by a fixing means using a surface fastener.