JP6905322B2 - Manufacturing method of pool with rust control adhesive sheet and swimming pool - Google Patents

Description

The present invention relates to a rust-suppressing adhesive sheet attached to a swimming pool (including swimming) and used, and relates to a rust-suppressing adhesive sheet-attached pool used as a design that serves as a mark for swimming or a design at the poolside. In particular, even if it is used over time in a swimming pool, fading is less than that of a conventional painted design. The present invention also relates to a pool for which a rust- suppressing adhesive sheet is attached, which does not cause partial peeling due to aging.

In swimming pools, it is known that concrete, aluminum, stainless steel, fiber reinforced plastic (FRP), etc. are used as the material of the pool tank. Then, a design that serves as a mark for swimming, that is, a course line, a cross line, or the like is constructed. According to the pool official regulations (April 1, 2010, Japan Swimming Federation Chapter 1 General Provisions Articles 21 to 24), such course lines and cross lines have, for example, a width of 0.20 m or more and 0.30 m or less, and a floor. The course line of the surface shall be a continuous straight line leaving 2.0 m from both end walls in the center of each course, and a cross line with a length of 1.0 m shall be installed at both ends. Further, in the case of a 50 m pool, a cross line having a length of 0.5 m must be installed on the course line at a position 15 m from both end walls. The course line of the end wall is installed in the center of each course at the height of the end wall excluding the starting platform, and the course is 0.50 m long so that the center of the line comes to the position 0.30 m below the water surface. It has been decided that a cross line of the same color as the line must be provided.
At present, these course lines, cross lines, etc. are generally constructed by painting. A conventional underwater coating method is disclosed, for example, in Patent Document 1. Currently, these designs are formed by painting a paint such as acrylic urethane on an epoxy resin-based paint as a base. However, it has been necessary to repaint every 5 to 10 years because the design due to painting may be peeled off or discolored due to deterioration over time.
Further, in order to form these designs on a stainless steel pool or the like by painting, it is known that a rough surface is formed in advance on the surface of the pool water tank to be painted by adjusting the painting base. This is to firmly fix the paint on the surface of the pool water tank and prevent the paint from peeling off from the surface of the pool water tank.

Further, it has been known that local corrosion occurs in a stainless pool water tank in which a course line or the like is constructed by painting.
As a result of diligent research on the causes of local corrosion due to painting, the present inventor has made progress in local corrosion, especially in unpainted stainless steel pools, at the boundary between partially painted edges such as course lines and cross lines and floor boards and side boards. It turned out. Such local corrosion has resulted in deterioration of appearance quality. In addition, the fading of the course line causes the swimmer to misunderstand the swimming direction, the fading of the cross line causes the misunderstanding of the turn start position, and the fading of the cross line on the end wall on the turn side causes the cross line to fade during the turn. It was a cause of functional deterioration such as mistaking the kick position.

Here, a corrosion reaction that causes local corrosion in a stainless steel pool will be described.
The 18-8 stainless steel used as the material for the pool tank is 18% chromium, 8% nickel, and the rest is iron and austenitic stainless steel, which is a trace element, and chromium (Cr) and oxygen (O) are combined on the surface. A stable oxide film (passivation film) is formed with a thickness of several nanometers (1 nm = 1 mm / 1,000,000). This passivation film prevents oxidative corrosion of iron (Fe), which accounts for most of the components, that is, rust, but when the passivation film is destroyed in pool water, pool water (H ₂ O) And dissolved oxygen (O ₂ ) to produce ferrous hydroxide (Fe + H ₂ O + 1/2 O ₂ → Fe (OH) ₂ ).
Ferrous hydroxide then produces ferric hydroxide (2 Fe (OH) ₂ + H ₂ O + 1/2 O ₂ → 2 Fe (OH) ₃ ). Next, water molecules are removed from ferric hydroxide to form iron oxyhydroxide, that is, red rust (Fe (OH) ₃ → FeOOH + H ₂ O). Iron atoms eluted into water becomes cations carry a positive charge, leaving two electrons negatively charged ^{(Fe → Fe 2+ + 2e -} ). This is a basic oxidation reaction and is known as an iron dissolution reaction (anode reaction (anode reaction)). Then, receive electrons of oxygen in water is liberated at the surface of iron, oxygen hydroxide ion is reduced (OH ^-) is (cathode reaction (cathodic reaction)). Here, the pool water is usually neutral, but when it becomes acidic, hydrogen ions receive electrons, and the generated hydrogen (H ₂ ) activates the metal surface. As a result, it is known that a passivation film on the surface of stainless steel is not formed and oxidative corrosion is promoted. The red rust produced by oxidative corrosion of stainless steel in water in this way impaired the appearance quality of the pool.

Next, local corrosion in the stainless steel pool will be described.
As long as the passivation film blocks water and oxygen, oxidative corrosion does not occur, but the passivation occurs due to the effects of low pH of water, acidity, increased dissolved oxygen content, presence of chloride ions, temperature, etc. Corrosion occurs when the coating is broken. For example, when the non-conductor coating is broken in dots, the above-mentioned iron dissolution reaction occurs locally, resulting in local corrosion.
Here, local corrosion includes pitting, crevice corrosion, intergranular corrosion, stress corrosion cracking, dissimilar metal contact corrosion, erosion corrosion, microbial corrosion, fatigue corrosion, etc., and in stainless steel pools, pitting and crevice corrosion are mainly used. It turned out that was occurring. Both pitting corrosion and crevice corrosion are corrosion that occurs in an environment containing halide ions such as chloride ions, and the passivation film is locally destroyed by the action of chloride ions, etc., and the corrosion reaction preferentially occurs in that part. It is known to progress. Pitting corrosion is punctate or worm-eaten corrosion that occurs on the free surface, and crevice corrosion is corrosion that occurs in crevices. Both pitting corrosion and crevice corrosion are electrochemical reactions in which the dissolution of iron by the anodic reaction and the precipitation of hydroxide by the cathodic reaction occur continuously at the fractured part of the passivation film, and are considered to be similar in principle. ing.
The mechanism of the pitting reaction is briefly shown below.
(1) The immobile film is locally destroyed by chloride ions and pitting corrosion starts, (2) metal atoms are eluted as ions in the pores (anodic reaction), and (3) the metal ion concentration in the pores increases. ^{Increase, (4) attract Cl-} ions to maintain electrical neutrality in the pores, (5) ^{increase Cl-} ion concentration, (6) chloride hydrolyze in the pores to form hydroxides The formation of H ⁺ lowers the pH (becomes more acidic), and (7), that is, the ^{increase in Cl-} ion concentration and the decrease in pH increase the pitting corrosion. Pitting corrosion does not stop unless these reactions stop in pool water.

The mechanism of the crevice corrosion reaction is briefly shown below. (1) The passivation film in the gap is locally destroyed by chloride ions, (2) metal atoms are eluted as ions in the gap (anode reaction), and (3) the cathode reaction is passivation outside the gap. It advances on the coating to form a local battery, (4) the metal ion concentration increases in the gap, (5) ^{it attracts Cl-} ion to maintain the electrical neutrality in the gap, and (6) Cl ^- ion. The concentration increases, (7) iron ions are hydrolyzed, the H ⁺ concentration increases and the pH decreases, (8) that is, the passivation film cannot be formed due to the increase and pH decrease of ^{Cl-ion concentration, and (9) anode and cathode.} The corrosion current between them increases and it corrodes violently. Gap corrosion does not stop unless these reactions stop in pool water.
As a result of these studies, in pool water, iron, which is the main component of stainless steel, is constantly supplied with water and oxygen, which cause oxidative corrosion, and sodium hypochlorite, which is constantly supplied for disinfection of pool water. It was found that the coexistence of chloride ions derived from disinfectants leads to the occurrence of local corrosion. Further, local corrosion does not occur in the unpainted portion, and a large amount of local corrosion occurs in the line painted end, the painted edge due to the partial peeling of the entire surface coating, and the cracked portion of the coating. We focused on the relationship between the crevice corrosion phenomenon in the part and the passivation coating, which is the key to corrosion protection.

Here, on the floor plate and side plate of the pool water tank, an undercoat layer having a special corrosion resistance developed for the pool and a coating film layer made of highly durable acrylic urethane resin, fluororesin, or the like are formed.
Therefore, roughening the stainless steel surface of the pool water tank, especially polishing with an electric tool, destroys the passivation film layer formed on the stainless steel surface of the pool water tank by friction and heat, and also works as a alteration layer. It was found that it causes the formation of process-induced martensite. As a matter of course, the passivation film was not regenerated on the stainless steel surface of the pool water tank, which was once rubbed during roughing to form a work-altered layer. It was also found that the stainless steel material with process-induced martensite had a low pitting potential and reduced corrosion resistance. Then, the coating film that protected the stainless steel substrate from oxygen and chlorine was destroyed by cracks, chips, and floats due to aging, and the destroyed part of the passivation film on the stainless steel surface was exposed to oxygen and chlorine over time. Will be. In the local corrosion, the surface is roughened as so-called crevice corrosion, and the partially painted edges such as the course line formed by painting, the painted edges due to the partial peeling of the entire surface coating, the cracked portions of the coating, and the stainless steel substrate are exposed. It will proceed at the boundary with the floor board and side board. Local corrosion generated on the coated base that has been roughened in this way progresses extremely compared to rust on the non-roughened portion, and holes are deeply pierced in the stainless steel plate as pitting corrosion, resulting in deterioration of appearance quality. Not only that, it causes a fatal defect such as water leakage in the pool tank. Furthermore, if the adhesion strength between the roughened surface and the coating film is insufficient, there is a problem that the coating film peels off in pieces, which causes injuries due to the sharp edges of the peeled pieces. rice field.

In addition, there is a problem that the course line of the pool tank and the like are discolored due to use over time. Discoloration occurs when the pigment of the pigment contained in the paint changes its chemical structure due to oxidation, reduction reaction, etc., and the hue changes. Pigments are roughly classified into organic pigments and inorganic pigments. In inks and the like that are generally used as organic pigments, they are formed into a desired color by combining with phthalocyanine blue, carbon black, and disazo yellow. Among these, in particular, the compound constituting disazo yellow has a weak bond as compared with other pigments, so that the chemical bond is easily broken by ultraviolet rays, and as a result, a hue change is likely to occur. Inorganic pigments are roughly classified into natural mineral pigments and synthetic inorganic pigments. It is more resistant to ultraviolet rays than organic pigments, but there are restrictions on color reproduction.

For example, lead tan, iron oxide red (valve pattern), etc. are used as natural mineral pigments that exhibit red color, but it is a natural color close to brown, and it is a sober and deep color, and it is difficult to reproduce various colors. .. In such cases, organic pigments are superior in producing vivid colors, but pigments are appropriately selected and used in consideration of fading durability and color development. In addition to the chemical changes caused by UV light, sodium hypochlorite for pools promotes fading of the course line. Sodium hypochlorite for disinfecting pool water is an oxidizing bleach. When the pigment contained in the pigment is exposed to sodium hypochlorite, the hue changes due to oxidative decomposition. In this way, the hue of the pigment visually changes due to the chemical change caused by the oxidation reaction and ultraviolet irradiation. Therefore, the paint fades over time.
Further, the conventional coating of a pool water tank generally comprises four steps of a base treatment step, an undercoating step, an intermediate layer coating step, and a coloring coating step. Each process requires a drying period of about 1 day, and a minimum of 5 days is required until the painting is completed. Further, it is known that generally used epoxy paints and urethane-based paints are difficult to be applied in cold regions because a predetermined temperature or higher is required as a curing condition.

Japanese Unexamined Patent Publication No. 2001-29870

The present invention provides a course line, a cross line, etc. that serve as a mark for swimming in a swimming pool, and aged deterioration in a full-coat layer or a partial coat layer, which is a problem found in the prior art in order to have a non-slip function. The purpose is to suppress peeling due to peeling, deterioration of appearance quality due to fading, deterioration of functionality, and occurrence of injuries due to peeling pieces.
Further, according to the present invention, in a stainless steel unpainted pool, which has been a problem in the past, a floor plate or a side plate in which a partially coated layer end such as a course line, a painted edge due to partial peeling of the entire surface coating, a cracked portion of coating, and a stainless steel base are exposed The purpose is to eliminate the deterioration of appearance quality due to rust caused by local corrosion at the boundary with.
Another object of the present invention is to prevent water leakage through the floor plate or side plate due to the progress of local corrosion, and to prevent a fatal deterioration of the function of the swimming pool.

Another object of the present invention is to prevent scratches and lacerations on the skin due to the unevenness of the conventional non-slip coating layer portion, and to improve safety.
Further, according to the present invention, in a pool facility installed outdoors, structural members exposed above the water surface, such as a pool side plate, a top plate, and an area around an overflow duct, rise in temperature due to sunlight and come into contact with the skin of a swimmer. The purpose is to improve safety by preventing excessive heat and low-temperature burns due to long-term contact.
A further object of the present invention is to provide a pool for attaching a rust-suppressing adhesive sheet, which can facilitate the construction of a course line or the like and shorten the construction period.

The present inventor has adopted the following configuration in order to solve the above problems.
(1) In the swimming pool where the design is displayed, the design that serves as a swimming mark displayed on the bottom and sides of the pool tank that forms the pool and the design that is displayed on the \ or poolside suppress rust. It is a pool for attaching a rust-suppressing adhesive sheet, which is characterized by being formed of an adhesive sheet.
Here, the design that serves as a mark for swimming is a course line, a cross line, or the like. Further, the design displayed on the poolside is a sheet for preventing slippage, a mark displayed on the railroad crossing board, or the like. Currently, it is the painted part displayed on the peripheral edge of the pool tank and the part displayed as a mark on the attached sheet. Here, the rust-suppressing adhesive sheet is a thin material having an adhesive layer for being attached to the surface of a pool facility. The rust-suppressing pressure-sensitive adhesive sheet used in the present invention is preferably formed of a flexible material. However, the sheet made of a hard material is not excluded from the scope of the present invention.
Further, the designs displayed on the bottom surface and the side surface of the pool water tank include those displayed on the inner surfaces of the bottom plate, the end wall, and the side plates of the pool water tank. The design displayed on the poolside is a design on the peripheral edge of the pool tank, for example, a design on a plate covering a drainage ditch, a design displayed on a diving platform, or the like.
(2) In the pool where the design formed of the rust-suppressing adhesive sheet is displayed, the rust-suppressing adhesive sheet is formed by laminating a colored or uncolored synthetic resin base material layer and an adhesive layer. The rust-suppressing adhesive sheet affixed pool according to (1) above.

(3) The synthetic resin base material layer constituting the rust-suppressing pressure-sensitive adhesive sheet has a base material formed of any one of vinyl chloride resin, acrylic resin, polyester resin, silicone rubber, and foam rubber. The rust-suppressing adhesive sheet affixed pool according to (1) or (2) above.
Here, the vinyl chloride resin used for the synthetic resin base material of the present invention is obtained by polymerizing chloroethylene. As the vinyl chloride resin used in the present invention, soft polyvinyl chloride is particularly preferable.
The acrylic resin used for the synthetic resin base material of the present invention is a polymer of an acrylic acid ester or a methacrylic acid ester, and is a transparent amorphous synthetic resin. Further, polyester is a polycondensate of dicarboxylic acid and diol. Further, the silicone rubber is made by forming a silicone resin into a rubber shape and giving it rubber elasticity at room temperature. Further, the foamed rubber is formed by kneading an organic foaming agent, a cross-linking agent, a softening agent, and a reinforcing agent with a raw material made of natural rubber or synthetic rubber and vulcanizing it. When the synthetic resin base material layer is formed of foam rubber, a fabric-like base material can be encapsulated inside the design to impart strength, and therefore the elasticity to tensile stress is low at the time of sticking. Suitable for work. In addition, slip resistance and cushioning properties can be imparted to designs and the like displayed on the poolside.
It is preferable that all the materials have flexibility. This is because the formed rust-suppressing adhesive sheet can be rolled up and handled.

(4) The above-mentioned (2) or (3), wherein the pressure-sensitive adhesive layer constituting the rust-suppressing pressure-sensitive adhesive sheet has any one of an acrylic type, a urethane type, and a silicone type as a main raw material. It is a pool with a rust-suppressing adhesive sheet attached.
Here, the adhesive sheet is one in which one side or both sides of the support is coated with an adhesive. It is relatively wide or plate-shaped, and in some cases can be rolled into a roll. Adhesion is a type of adhesion, and is characterized by the fact that it does not use water, solvent, heat, etc., and adheres only by applying a slight pressure at room temperature for a short time. Here, the term "adhesion" refers to a state in which surfaces of the same or different types of solids are bonded and integrated. As the bonding method, an adhesive is generally used. Examples of the adhesive include a solvent type, an aqueous dispersion type, a hot melt type, a reaction system and the like. An adhesive is mentioned as a kind of such an adhesive. The pressure-sensitive adhesive is industrially used as a pressure-sensitive-adhesive, and immediately adheres the same or different kinds of solid surfaces at room temperature without requiring a curing reaction under a slight pressure. After bonding, the liquid state is maintained without hardening, and when it is no longer needed, the adhesive can be peeled off from the bonding interface without coagulating and breaking. The adhesive changes from a liquid to a solid by a curing reaction after wetting the surface of the same or different solids with a liquid. When an attempt is made to peel off the adhesive that has changed to a solid, the adhesive that has coagulated and broken remains on each of the opposing solid surfaces. That is, the adhesive is used without peeling after bonding, but the adhesive can also be peeled off.
As the rust-suppressing pressure-sensitive adhesive sheet used in the present invention, the pressure-sensitive adhesive layer may be formed by an adhesive, but those formed by the above-mentioned pressure-sensitive adhesive are more preferable.

Here, the acrylic pressure-sensitive adhesive used in the pressure-sensitive adhesive layer of the present invention is mainly composed of an acrylic polymer obtained as a copolymer of an acrylic acid alkyl ester monomer, a carboxyl group-containing monomer, and \ or a hydroxyl group-containing monomer. And. The glass transition point (Tg), weather resistance, and durability are adjusted by adjusting the type of monomer, the molecular weight of the polymer, the amount of isocyanate or epoxy added as a cross-linking agent, and appropriately controlling the cross-linking density during three-dimensional cross-linking. , Physical property values such as heat resistance and optical characteristics can be controlled. Further, the adhesive flows after the application to increase the adhesion to the adherend, and the strong adhesive force is exhibited by the intermolecular force, so that the adhesive is hard to peel off.
The urethane-based pressure-sensitive adhesive used in the pressure-sensitive adhesive layer of the present invention is a pressure-sensitive adhesive having a urethane group (-NCHCOO-), which is crosslinked with a polyester polyol or a polyether polyol and a polyisocyanate compound. The ones that have been made can be mentioned. Alternatively, it consists of a polyurethane polyol.
Urethane-based adhesives are more hydrophilic than rubber-based and acrylic-based adhesives. Compared with acrylic adhesives, the adhesiveness tends to be low, but it is excellent in low odor, low skin irritation, chemical resistance, and weather resistance. Various additives can control various physical properties from slight adhesion to adhesion, but they are expensive.
Further, the silicone-based pressure-sensitive adhesive is a pressure-sensitive adhesive containing organopolysiloxane as a main component, and examples thereof include a condensation curing type and an addition curing type. The condensation-curing type is a liquid or paste-like mixture of an organopolysiloxane having a hydroxyl group as a functional group and a cross-linking agent. When it comes into contact with the atmosphere during adhesion, it reacts with moisture in the atmosphere and cures from the surface, and finally A hardened layer having rubber elasticity is formed on the surface. The addition-curing type is a two-component type pressure-sensitive adhesive divided into an organopolysiloxane having an alkenyl group such as a vinyl group as a functional group and a cross-linking agent having a hydrosilyl group. It can be cured and adhered by heating with a catalyst. Silicone adhesives have a wide range of usable temperatures and are excellent in chemical resistance and water resistance. In addition, the slightly adhesive type has excellent air bleeding property at the time of sticking, and can be stuck without air bubbles entering.

(5) In the synthetic resin base material layer having foamed rubber as a base material, the design that serves as a mark for swimming or the design displayed on the poolside has a structure having air bubbles inside (3). ) Is the pool to which the rust-suppressing adhesive sheet is attached.
(6) The rust-suppressing pressure-sensitive adhesive sheet-attached pool according to (5) above, wherein the foam rubber is a non-diene thermoplastic elastomer.
A non-diene thermoplastic elastomer is a rubber that does not have a double bond in the polymer backbone, or has very little, if any. For example, butyl rubber, ethylene / propylene rubber, ethylene / propylene / diene rubber, urethane rubber, chlorosulfonated polyethylene rubber, acrylic rubber, epichlorohydrin rubber, polysulfide rubber, silicone rubber, fluororubber and the like can be mentioned. As the non-diene thermoplastic elastomer used in the present invention, chlorosulfonated polyethylene rubber is particularly preferable from the viewpoints of aging / ozone resistance, weather resistance, abrasion resistance, and mechanical properties.

(7) Attaching the rust-suppressing adhesive sheet according to (6) above, wherein the foam rubber has one or more effects selected from the anti-slip effect, the cushioning / shock absorbing effect, and the heat insulating effect. It is a pool.
Here, the index of slippage can be obtained by the slip resistance coefficient measured by the slipperiness test of the flooring material defined in JIS A 1454. Further, if the design at the poolside is colored even a little, the temperature of the underlying stainless steel material rises because it absorbs heat rays. Here, white, red, blue, etc. are often used as the designs on the bottom and sides of the pool tank, and white, red, brown, green, blue, and various other colors are used as the designs on the poolside. Will be done.

(8) In the method of constructing a design on a swimming pool, any of the above (1) to (7) can be found on the bottom and side surfaces of the pool tank in the swimming pool and on the \ or poolside where the design needs to be displayed. It is a method of manufacturing a swimming pool having a design displayed, which is characterized in that it is constructed by attaching the rust-suppressing adhesive sheet described in the above.
Here, as a method for forming the adhesive layer, a method using a knife coater, a method using a die coater, a bar coater, a roll coater, a blade coater, a doctor coater, a comma coater (registered trademark), a gravure coater, or the like is used to apply the adhesive. Can be mentioned. The coating method may be arbitrarily selected according to the material and physical properties of the pressure-sensitive adhesive and the physical characteristics of the coating film to be formed.
It is preferable to heat-dry after applying the pressure-sensitive adhesive. Such a heat-drying process has the significance of removing the organic solvent mixed in order to adjust the viscosity of the pressure-sensitive adhesive. The varnish-like adhesive cannot be applied if there is no fluidity at the time of coating, but if there is fluidity after coating, the film thickness uniformity cannot be maintained. Further, since the film thickness decreases when the solvent is volatilized, it is necessary to volatilize the coating film so that the residual solvent concentration of the coating film is several percent, and in some cases less than 1%, in order to stabilize the film thickness. That is, it is a step necessary to obtain a desired coating film thickness, coating film stability and adhesiveness through a solvent removal step. Adhesive viscosity adjustment, coating speed, coating amount, heating and drying temperature and time, various physical characteristics of the base material or release paper or release film, suppression of foaming and unevenness during coating, other productivity and stability, etc. It may be decided arbitrarily within a reasonable range in consideration of.
Further, it is also possible to add a curing agent (crosslinking agent) to the pressure-sensitive adhesive and perform three-dimensional cross-linking in this heating step. This makes it possible to control the fluidity, cohesiveness, and adhesiveness of the pressure-sensitive adhesive.
If a release paper or a release film is laminated on the adhesive layer of the adhesive sheet formed in this way, it is easy to handle during storage or installation in a pool water tank. In particular, a long rust-suppressing adhesive sheet may be rolled and used for construction, and laminating a release paper or a release film is suitable in terms of storability and workability. At the time of construction, the release paper or the release film may be peeled off and attached along the reference line connecting the starting point and the ending point of the attachment. At that time, efficient construction can be performed by using an auxiliary squeegee or the like to bleed air from the sticking surface and pressurize the adhesive sheet.

The rust-suppressing adhesive sheet-attached pool according to the present invention has a course line, a cross line, etc. that serve as a mark for swimming in a swimming pool, and an appearance quality due to peeling and fading due to aged deterioration in a design for providing a non-slip function. It has the effect of suppressing the occurrence of injuries caused by exfoliation and deterioration of functionality.
Further, in the pool for attaching the rust-suppressing adhesive sheet according to the present invention, the edge of the partial coating layer such as the course line, the coating edge due to partial peeling of the entire coating, the cracked portion of the coating, and the boundary portion between the floor plate or the side plate where the stainless steel base is exposed. It has the effect of eliminating the deterioration of appearance quality due to rust caused by local corrosion.
In addition, it has the effect of preventing water leakage through the floor plate or side plate due to the progress of local corrosion and preventing fatal functional deterioration as a swimming pool.

Further, the pool to which the rust-suppressing adhesive sheet is attached according to the present invention can solve problems such as scratches and lacerations of the skin due to the unevenness of the conventional non-slip coating layer portion, and can improve safety.
Further, in the pool to which the rust-suppressing adhesive sheet is attached according to the present invention, in a pool facility installed outdoors, structural members exposed above the water surface, such as the pool side plate, the top plate, and the area around the overflow duct, are heated by sunlight. However, it has the effect of improving safety, such as preventing excessive heat when it comes into contact with the swimmer's skin and preventing low-temperature burns due to long-term contact.
Further, the rust-suppressing adhesive sheet-attached pool according to the present invention has an excellent effect of facilitating the construction of a course line or the like and shortening the construction period.

It is a conceptual diagram for demonstrating the laminated structure of the rust-suppressing adhesive sheet which concerns on Embodiment 1. (A) shows the laminated structure of the rust-suppressing adhesive sheet according to the first embodiment. (B) is a figure which shows the laminated structure by the conventional coating layer.

An example of the embodiment according to the present invention will be described with reference to the drawings. However, the following description is an example of the present invention and does not limit the technical scope of the present invention.
FIG. 1A is a conceptual diagram showing a rust-suppressing adhesive sheet according to the first embodiment used for the pool of the present invention. The rust-suppressing pressure-sensitive adhesive sheet-attached pool 10 according to the first embodiment is configured by laminating a colored or uncolored synthetic resin base layer 1 and a pressure-sensitive adhesive layer 2. Reference numeral 4 indicates the bottom surface and the side surface of the pool tank forming the pool, or the poolside facility.
On the other hand, FIG. 1B is a diagram showing a pool facility having a laminated structure by conventional painting. As shown in FIG. 1 (b), in the display of the design 5 in the conventional pool facility, the stainless steel surface of the pool water tank 6 is roughened, then roughened, and then painted. However, by performing the rough surface processing 7, the passivation coating layer that contributes to the corrosion resistance and high durability inherent in stainless steel is also scraped. Normally, the passivation film is instantly regenerated even if it is ground, but it is not regenerated when a work-altered layer is formed on the surface layer due to frictional heat during rough surface processing. Then, rust is generated at the boundary between the painted end of the design 5 and the pool water tank 6, causing local corrosion.

Since the pool in which the rust-suppressing adhesive sheet 10 according to the first embodiment is used is constructed by sticking the surface of the pool facility without roughening, local corrosion does not occur. This is because, by using the rust-suppressing adhesive sheet 10 according to the first embodiment, the passivation coating layer on the stainless steel surface is not destroyed and the processed alteration layer is not generated, so that rust does not occur. Therefore, in the rust-suppressing adhesive sheet-attached pool 10 according to the first embodiment, it is possible to prevent water leakage through the floor plate or side plate due to the progress of local corrosion. In addition, by substituting the general pool coating with the rust-suppressing adhesive sheet 10, the appearance quality due to peeling and fading due to aging deterioration in the course line, cross line, etc., and the design for providing the anti-slip function. It is possible to suppress deterioration, deterioration of functionality, and the occurrence of injuries due to exfoliated pieces.
Further, the pool to which the rust-suppressing adhesive sheet 10 according to the first embodiment is attached can solve problems such as scratches and lacerations of the skin due to the unevenness of the anti-slip coating layer portion, and can improve safety.

Hereinafter, an example of the rust-suppressing adhesive sheet affixed pool according to the present invention will be described as an example, and the test results in comparison with the comparative example will be described.
Example 1
The synthetic resin base material layer constituting the rust-suppressing adhesive sheet, which is an example used in the rust-suppressing adhesive sheet-attached pool according to the present invention, is made of an acrylic resin (made by Kuraray, acrylic resin "parapet") and blue organic. A blue acrylic resin film (t0.05 mm) obtained by kneading a system pigment (manufactured by Toyo Color, phthalocyanine organic pigment "Lionol Blue"), dissolving it in a solvent, and then forming a film was used.
The blue acrylic resin film was mixed with 100 parts of an acrylic pressure-sensitive adhesive (manufactured by Soken Chemical Co., Ltd., acrylic pressure-sensitive adhesive "SK Dyne 1310") and one part of a curing agent (manufactured by Toso, isocyanate-based curing agent "Coronate L"). A rust-suppressing adhesive sheet was obtained by applying the material.

Example 2
The synthetic resin base material layer constituting the rust-suppressing adhesive sheet of another embodiment used in the rust-suppressing adhesive sheet-attached pool according to the present invention is made of chlorosulfonated polyethylene rubber, a foaming agent and a blue organic pigment. A blue foam rubberized cloth (t0.3 mm) obtained by adding, crimping to a polyester base cloth with a calendar roll, and foaming to form a sheet was used.
A rust-suppressing adhesive sheet was obtained by applying an acrylic pressure-sensitive adhesive to the blue foam rubberized cloth. As the blue organic pigment and the acrylic pressure-sensitive adhesive, the same ones as in Example 1 were used.

Comparative Example 1
As Comparative Example 1, a blue ink (made by Teikoku Ink, screen) was applied to the surface of an adhesive sheet obtained by applying an acrylic adhesive to a white vinyl chloride film (made by Okamoto, vinyl chloride film (milky white), t0.08 mm). Printing ink "VK") is silk-screen printed, and transparent clear (made by Teikoku Ink, "SP-62AU clear") is screen-printed on it, and a colored layer and a protective layer to protect it are provided. An adhesive sheet made of a resin base material layer was obtained.
As the acrylic pressure-sensitive adhesive, the same one as in Example 1 was used.

Comparative Example 2
As Comparative Example 2, the synthetic resin base material layer is a synthetic resin base material layer formed of a vinyl chloride film (manufactured by Okamoto, vinyl chloride film (blue), t0.08 mm) colored in blue, and an acrylic pressure-sensitive adhesive. A pressure-sensitive adhesive sheet of Comparative Example 2 composed of a pressure-sensitive adhesive layer formed by coating was obtained.
As the acrylic pressure-sensitive adhesive, the same one as in Example 1 was used.
Comparative Example 3
As Comparative Example 3, a stainless steel plate coated with a blue paint (made by Daido Paint, pool paint "Pool Coat Special AUD No. 808") was prepared.

Chlorine resistance water test Sodium hypochlorite was used for the above-mentioned Examples 1 and 2, the various adhesive sheets produced in Comparative Examples 1 and 2 attached to a stainless steel plate, and the painted stainless steel plate of Comparative Example 3. The adhesive sheet was tested for fading by immersing it in an aqueous solution having a residual chlorine concentration of 200 ppm and a water temperature of 40 ± 2 ° C. The degree of fading was measured using a spectrophotometer (SM-C manufactured by Suga Test Instruments Co., Ltd.), and the color difference ΔE was calculated. In the evaluation, we focused on the fact that the fading of the course line did not progress and that there was little change over time. The results of the fading test are summarized in Table 1 below.

As is clear from Table 1, the results of Examples 1 and 2 were slightly fading, but since there was almost no change in the color difference between 10 days and 20 days, no further fading progressed. It is presumed that the color fading resistance is good.
Further, in Comparative Example 1, since the method of printing ink, remarkable fading was observed even if the colored layer was thin and the protective layer was provided, and the rate of change tended to increase by 11%, and the fading progressed. Sex is a concern.
Further, in Comparative Example 2, since the bluish organic pigment was kneaded and colored, the result was less fading than in Comparative Example 1, but the rate of change tended to increase by 15.9%, and the fading progressed. Is a concern.
Further, in Comparative Example 3, the fading in 10 days was slightly small, but the rate of change was excessive at 30.9%, and it was found that there was the greatest concern about the progress of fading in the Comparative Examples.
From the above results, the rust-suppressing adhesive sheet-attached pool using the rust-suppressing adhesive sheet according to Examples 1 and 2 has a course line and a pool as compared with the pool using the adhesive sheet and coating according to Comparative Examples 1 to 3. It has been clarified that it has an effect of suppressing deterioration of appearance quality due to fading in a design for providing a non-slip function as well as a cross line.

Adhesive strength evaluation test The following is an evaluation of the adhesive strength of a rust-suppressing adhesive sheet made of a blue acrylic film and a blue foam rubber cloth, in accordance with JIS Z 0273, with an initial 180 ° peeling adhesive strength and sticking to a stainless steel plate. Later, an adhesive strength evaluation test was conducted after the chlorine water test was carried out. The results are shown in Table 2. In Table 2 below, the configuration A is the rust-suppressing adhesive sheet of Example 1, and the configuration B is the rust-suppressing adhesive sheet of Example 2.

Here, the normal adhesive strength is the adhesive strength 20 minutes after the adhesive sheet is attached to the stainless steel plate as the adherend. The stainless steel plate was prepared using cold-rolled SUS 304 specified in JIS G 4305. In the chlorine resistance water test, the adhesive strength and appearance were evaluated after immersing the adhesive sheet in a test water tank in which the residual chlorine concentration in the sodium hypochlorite aqueous solution was constantly maintained at 200 ppm and the water temperature was controlled at 40 ± 2 ° C. Is. The test period was 30 days. As a result, the adhesive strength after being immersed in chlorine water for 30 days was more than twice as much as the normal adhesive strength. From this result, it was found that the adhesive strength to stainless steel tends to increase gradually even in chlorinated water.

Rust control effect confirmation test Next, each rust control adhesive sheet manufactured in Examples 1 and 2 is cut into the shape of a course line tape and a cross line tape, and attached to the inner surfaces of the bottom plate, end wall, and side plate of the pool facility. The effect of suppressing rust was confirmed. The pool facilities are A, B, and C, all of which are outdoor swimming pools. The day after the application, a specified amount of tap water was injected, and the pool was operated as a swimming pool while controlling the residual chlorine concentration in the range of 0.4 ppm to 1.0 ppm for water quality control.

The method for confirming the rust suppressing effect is shown below. The local corrosion points near the course line coating originally applied to each pool and the recurrence points after repairing the local corrosion using the rust suppression adhesive sheet of the present application were counted and evaluated by paying attention to the suppression rate.
When the local corrosion near the course line coating was counted, it was 103 points in pool A, 20 points in B, and 15 points in C. These rusts were manually polished and removed. At the same time, the old paint was removed with a paint remover and then ground-polished without heating. A rust-suppressing adhesive sheet was attached while keeping the adhered portion dry and clean. When the local corrosion recurrence sites of the site were counted 5 months after the application, recurrence was observed in 6 sites in pool A, but no recurrence was observed in pools B and C. The rust suppressing effect is summarized in Table 3 below.

なお、錆抑制効果確認試験を実施したプールＡに関し、錆抑制効果確認試験より１年前に施した、従来技術である塗装により施工されたコースライン近傍の局部腐食を塗装補修後の再発箇所を計数したところ、４０箇所の補修後、５ヶ月経過後に２３箇所の再発が確認された。従来技術による錆発生の状況を以下の表４にまとめる。

Regarding Pool A, where the rust suppression effect confirmation test was conducted, the recurrence location after painting repair of the local corrosion near the course line, which was performed one year before the rust suppression effect confirmation test, was performed by painting, which is a conventional technique. As a result of counting, recurrence of 23 places was confirmed 5 months after the repair of 40 places. The situation of rust generation by the prior art is summarized in Table 4 below.

1 Synthetic resin base layer 2 Adhesive layer 4 Bottom surface, end wall surface and side wall surface of pool water tank forming pool, or poolside facility 5 Design in conventional pool facility 6 Conventional pool water tank 7 Rust suppression adhesive Sheet

Claims (7)

In the swimming pool where the design is displayed, the design that serves as a swimming mark displayed on the bottom and sides of the pool tank that forms the pool and the design that is displayed on the \ or poolside are rust-suppressing adhesive sheets. Has been formed and
Synthetic resin substrate layer, rust inhibitors adhesive sheet sticking pool, characterized in Rukoto which have a substrate formed from a vinyl chloride resin constituting the rust inhibiting adhesive sheet. In the pool where the design formed of the rust-suppressing adhesive sheet is displayed, the rust-suppressing adhesive sheet is characterized in that it is formed by laminating a colored or uncolored synthetic resin base material layer and an adhesive layer. The pool to which the rust-suppressing adhesive sheet is attached according to claim 1. The pool for attaching a rust-suppressing pressure-sensitive adhesive sheet according to claim 2, wherein the pressure-sensitive adhesive layer constituting the rust-suppressing pressure-sensitive adhesive sheet contains any one of acrylic, urethane, and silicone as a main raw material. In the swimming pool where the design is displayed, the design that serves as a swimming mark displayed on the bottom and sides of the pool tank that forms the pool and the design that is displayed on the \ or poolside are rust-suppressing adhesive sheets. Has been formed and
The synthetic resin base material layer constituting the rust-suppressing pressure-sensitive adhesive sheet has a base material formed of foam rubber and has a base material.
Wherein in the synthetic resin base material layer having a foam rubber as a base material, rust inhibitors adhesive sheet you wherein a design displayed on the design or the pool serves as a mark of swimming has a structure having voids inside Paste pool. The pool for attaching a rust- suppressing adhesive sheet according to claim 4 , wherein the foam rubber is a non-diene thermoplastic elastomer. The rust-suppressing adhesive sheet affixing pool according to claim 5 , wherein the foam rubber has one or more effects selected from an anti-slip effect, a cushioning / shock absorbing effect, and a heat insulating effect. A method of applying a design to a swimming pool, on the display part that needs of the design in the bottom and side surfaces and \ or pool pool aquarium in swimming pool, according to any one of claims 1 to 6 A method of manufacturing a swimming pool with a design that is characterized by being constructed by attaching a rust-suppressing adhesive sheet.

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