JP2015150547A - Antifouling treatment method for structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for sticking a plurality of antifouling pressure sensitive adhesive sheets, by which end parts of the sheets are overlapped one on another and the sheets are stuck together with no space between them, and peeling of the sheet from the overlapped part is suppressed.SOLUTION: An antifouling treatment method for a structure includes sticking an antifouling pressure sensitive adhesive sheet to a structure surface in such a way that a part of the pressure sensitive adhesive sheet overlaps on a part of another adjacent pressure sensitive adhesive sheet via an easily-adhesive pressure sensitive adhesive tape. In the antifouling treatment method, the antifouling pressure sensitive adhesive sheet includes a substrate layer, an adhesive layer provided on one side of the substrate layer and an antifouling layer provided on the other side, and the easily-adhesive pressure sensitive adhesive tape includes a substrate layer and a first adhesive layer provided on one side of the substrate layer.

Description

  The present invention relates to an antifouling treatment method for a structure using an antifouling pressure-sensitive adhesive sheet and an easily adhesive pressure-sensitive adhesive tape.

  Conventionally, it has been proposed to attach antifouling sheets to the surface of various structures for the purpose of preventing adhesion of dirt, ice and snow, and preventing adhesion of attached organisms such as barnacles (for example, Patent Document 1). When affixing an antifouling sheet to a large area such as a large structure, since there is a limit to the increase in sheet width, it is necessary to affix a plurality of antifouling sheets. At this time, if there is a gap between adjacent antifouling sheets, dirt and attached organisms adhere to the gap.

  Examples of a method for attaching a plurality of antifouling sheets without gaps include a method of attaching the end portions to each other, a method of attaching the end portions in an overlapping manner (for example, Patent Document 2), and the like. However, in the method of affixing the end portions together, it is necessary to consider the contraction and expansion of the sheet, and it is very difficult to actually eliminate the gap. In addition, the method of attaching the end portions in a superimposed manner may not provide sufficient adhesive force due to the surface characteristics of the antifouling sheet, and may peel off from the overlapped portion.

JP 2006-192734 A Japanese Examined Patent Publication No. 4-27076

  The present invention has been made in order to solve the above-described problems, and the object thereof is a method of attaching a plurality of antifouling pressure-sensitive adhesive sheets without overlapping a gap between the ends, and from the overlapped portions. It is in providing the method by which peeling was suppressed.

In the antifouling treatment method of the present invention, the antifouling pressure-sensitive adhesive sheet is affixed to the surface of the structure so that a part thereof overlaps with a part of another adjacent antifouling pressure-sensitive adhesive sheet via an easily adhesive pressure-sensitive adhesive tape. The antifouling pressure-sensitive adhesive sheet comprises a base material layer, an adhesive layer provided on one side of the base material layer, and an antifouling layer provided on the other side, The tape includes a base material layer and a first adhesive layer provided on one side of the base material layer.
In one embodiment, the antifouling layer of the antifouling pressure-sensitive adhesive sheet contains a silicone resin, and the first adhesive layer of the easy-adhesive pressure-sensitive adhesive tape contains a silicone-based pressure-sensitive adhesive.
In one embodiment, the easily adhesive pressure-sensitive adhesive tape further includes a second pressure-sensitive adhesive layer provided on the other side of the base material layer.
In one embodiment, the base material layer of the said easily-adhesive adhesive tape contains elastomer resin.
In one embodiment, the structure is a ship.

  In the antifouling treatment method of the present invention, a plurality of antifouling pressure-sensitive adhesive sheets are pasted in a state of being overlapped via an easily adhesive pressure-sensitive adhesive tape. Since the pressure-sensitive adhesive layer of the easy-adhesive pressure-sensitive adhesive tape can exert an excellent adhesive force to the antifouling layer, it is possible to suitably prevent peeling from the overlapped portion through the easy-adhesive pressure-sensitive adhesive tape. it can. Moreover, since it is not necessary to excessively increase the adhesive force of the antifouling pressure-sensitive adhesive sheet in order to prevent peeling from the overlapped portion, it is excellent in workability when peeling off and removing the used antifouling pressure-sensitive adhesive sheet. .

It is a schematic sectional drawing of an example of the antifouling adhesive sheet which can be used for the antifouling processing method of this invention. It is a schematic sectional drawing of an example of the easily-adhesive adhesive tape which can be used for the antifouling processing method of this invention. It is a schematic sectional drawing of another example of the easily-adhesive adhesive tape which can be used for the antifouling processing method of this invention. (A) And (b) is the schematic explaining the antifouling processing method of this invention, respectively.

  Hereinafter, the antifouling pressure-sensitive adhesive sheet and the easily adhesive pressure-sensitive adhesive tape used in the antifouling treatment method of the present invention will be described, and then the antifouling treatment method of the present invention will be specifically described.

[A. Antifouling adhesive sheet]
FIG. 1 is a schematic cross-sectional view of an example of an antifouling pressure-sensitive adhesive sheet that can be used in the antifouling treatment method of the present invention. The antifouling adhesive sheet 10 includes a base material layer 11, an adhesive layer 12 provided on one side of the base material layer 11, and an antifouling layer 13 provided on the other side. The antifouling pressure-sensitive adhesive sheet 10 may further include any appropriate other layer as necessary. Although not shown, a release film may be provided on the surface of the antifouling layer 13 and / or the surface of the adhesive layer 12 of the antifouling adhesive sheet.

  The thickness of the antifouling pressure-sensitive adhesive sheet is set to any appropriate thickness as long as the effects of the present invention are not impaired by the thickness of each layer contained therein. The thickness of the antifouling pressure-sensitive adhesive sheet is preferably 50 to 5000 μm.

  The shape of the antifouling pressure-sensitive adhesive sheet can be appropriately set according to the application and use environment. The antifouling pressure-sensitive adhesive sheet is typically strip-shaped. Arbitrary appropriate lengths can be adopted as the lengths of the long side and the short side depending on the application and use environment. From the viewpoint of work efficiency during sticking or peeling, the length (width) of the short side may be, for example, 10 cm to 2 m, preferably 20 cm to 1.5 m.

[A-1. Base material layer]
The base material layer is formed using any appropriate material. The base material layer preferably contains an elastomer resin. As the elastomer resin, any appropriate elastomer resin can be adopted as long as the effects of the present invention are not impaired. Examples of such elastomer resins include vulcanized rubber and thermoplastic elastomer. Examples of the thermoplastic elastomer include styrene elastomers, olefin elastomers, vinyl chloride elastomers, urethane elastomers, ester elastomers, amide elastomers, and the like. The elastomer resin in the base material layer may be only one type or two or more types. When the base material layer contains the elastomer resin, the antifouling pressure-sensitive adhesive sheet can be easily attached to a portion other than a flat surface such as a curved surface or an acute angle surface with good workability. In addition, appearance defects such as wrinkles and floats hardly occur on the surface after application.

  The content ratio of the elastomer resin in the base material layer is preferably 50% by weight or more, more preferably 60 to 100% by weight, still more preferably 70 to 99% by weight, and particularly preferably 80 to 98% by weight. %, Most preferably 90 to 97% by weight.

  The elastomer resin contained in the base material layer is preferably a urethane-based elastomer. Examples of the urethane elastomer include ester polyurethane, ether polyurethane, polyurethane acrylic resin, and the like. By adopting a urethane-based elastomer as the elastomer resin, the antifouling pressure-sensitive adhesive sheet can be more easily affixed to sites other than flat surfaces such as curved surfaces and acute angles. In addition, appearance defects such as wrinkles and floats are less likely to occur on the surface after application.

  The polyurethane acrylic resin has an acrylic component and a urethane component. More specifically, the polyurethane acrylic resin is a composite polymer containing a (meth) acrylic polymer and a urethane polymer. The weight ratio of the (meth) acrylic polymer to the urethane polymer in the polyurethane acrylic resin is preferably (meth) acrylic polymer / urethane polymer = 1/99 to 80/20. If the (meth) acrylic polymer / urethane polymer is less than 1/99, the viscosity of the precursor mixture may be high and workability may be deteriorated. If it exceeds 80/20, flexibility and strength as a polyurethane acrylic resin may be obtained. May not be obtained. In the present invention, “(meth) acryl” means acryl and / or methacryl.

  As the polyurethane acrylic resin, for example, a polyurethane acrylic resin described in JP2013-139533A can be preferably used (see paragraphs 0017 to 0051).

  The base material layer may contain any appropriate additive as long as the effects of the present invention are not impaired. Examples of such additives include olefin resins, silicone polymers, liquid acrylic copolymers, tackifiers, anti-aging agents, hindered amine light stabilizers, ultraviolet absorbers, antioxidants, and antistatic agents. , Polyethyleneimine, fatty acid amide, fatty acid ester, phosphate ester, lubricant, surfactant, filler and pigment (for example, calcium oxide, magnesium oxide, silica, zinc oxide, titanium oxide, carbon black, etc.).

  The base material layer preferably contains an ultraviolet absorber. When the base material layer contains the ultraviolet absorber, the weather resistance of the antifouling pressure-sensitive adhesive sheet is improved. When the base material layer does not contain an ultraviolet absorber, the base material is likely to be deteriorated by sunlight during outdoor use, and it may be difficult to maintain the initial base material strength. And when a base material deteriorates, when peeling a used antifouling adhesive sheet from a to-be-adhered body, a base material layer will cut | disconnect frequently and there exists a possibility that work efficiency may deteriorate remarkably.

  Arbitrary appropriate thickness can be employ | adopted for the thickness of a base material layer according to the objective. The thickness of a base material layer becomes like this. Preferably it is 1-1000 micrometers, More preferably, it is 10-800 micrometers, More preferably, it is 20-500 micrometers. By keeping the thickness of the base material layer within the above range, the antifouling pressure-sensitive adhesive sheet can be easily attached to a portion other than a flat surface, such as a curved surface or an acute angle surface, with good workability. In addition, appearance defects such as wrinkles and floats hardly occur on the surface after application.

  In order to improve adhesion to the antifouling layer, a primer may be applied to the base material layer in advance, or a silane coupling agent may be added in advance. When the antifouling layer contains a silicone resin, adhesion to the base material layer may be low due to the low surface energy that is a characteristic of the silicone resin. If the adhesion between the antifouling layer and the base material layer is low, the antifouling layer that exhibits the antifouling effect peels off from the base material layer due to impact or physical damage during use, and the original antifouling effect continues. It may not be possible. Therefore, a primer is applied to the surface of the base material layer in advance to improve the adhesion to the antifouling layer, or silanol groups and alkoxysilane groups that react with the silicone resin are introduced into the base material layer with a silane coupling agent. The adhesion can be improved by performing a condensation reaction with a reactive group on the base material layer during application of the condensation type silicone resin.

  Only one type of silane coupling agent may be used, or two or more types may be used. Specific examples of commercially available silane coupling agents include KBM5103, KBM1003, KBM903, KBM403, and KBM802 manufactured by Shin-Etsu Chemical Co., Ltd.

  When the silane coupling agent is included in the base material layer, the content ratio of the silane coupling agent in the base material layer is preferably 0.01 to 10% by weight. When the content rate of the silane coupling agent in a base material layer exceeds 10 weight%, there exists a possibility that a silane coupling agent may become a crosslinking point and a base material layer may become hard. When the content rate of the silane coupling agent in a base material layer is less than 0.01 weight%, there exists a possibility that sufficient adhesiveness cannot be expressed between a base material layer and an antifouling layer.

  The surface of the base material layer on which the adhesive layer is provided may be subjected to an easy adhesion treatment. By performing the easy adhesion treatment, the adhesive residue at the time of peeling and removal can be suppressed. Any appropriate chemical surface treatment, physical surface treatment, and combinations thereof may be used as the easy adhesion treatment. Specific examples include vapor deposition of metals, oxides, inorganics, etc .; sputtering of oxygen, nitrogen, argon, etc .; plasma treatment; acids such as hydrochloric acid, sulfuric acid, nitric acid, alkalis such as sodium hydroxide, potassium hydroxide, or organic solvents Surface treatment by UV; ozone irradiation; corona discharge treatment; flame treatment; application of coupling agent; roughening treatment by mold shape transfer, sand blasting, stretching and bending; filler to substrate forming material, coupling agent And the like.

[A-2. Adhesive layer]
Any appropriate pressure-sensitive adhesive layer can be adopted as the pressure-sensitive adhesive layer as long as the effects of the present invention are not impaired. Examples of the material for such an adhesive layer include acrylic resin adhesives, epoxy resin adhesives, amino resin adhesives, vinyl resin (vinyl acetate polymers, etc.) adhesives, and curable acrylic resin adhesives. Agents, silicone adhesives, and the like. The material of the adhesive layer may be only one type or two or more types.

  The adhesive layer has a 180-degree peel adhesive strength at 23 ° C. and a tensile speed of 300 mm / min, preferably 30 N / 20 mm or less, more preferably 20 N / 20 mm or less, and still more preferably 15 N / 20 mm or less. When the adhesive layer has a 180 ° peel adhesive strength of 30 N / 20 mm at 23 ° C. and a tensile speed of 300 mm / min, it becomes difficult to peel off the used antifouling adhesive sheet from the structure, and the work efficiency at the time of peeling and removal May be significantly worse. The lower limit of the 180-degree peel adhesive force at 23 ° C. and a tensile speed of 300 mm / min of the adhesive layer is, for example, 1 N / 20 mm or more, preferably 5 N / 20 mm or more from the viewpoint of maintaining sufficient adhesive force.

  The 180 degree peel adhesive force of the pressure-sensitive adhesive layer can be measured, for example, as follows. That is, an adhesive layer is laminated on a base material to prepare an adhesive sheet, which is cut into a test piece size of 80 mm × 20 mm. As the adherend, a plastic FRP plate reinforced by putting a glass cloth in an epoxy resin of 30 mm × 100 mm × thickness 2 mm is used. The test piece is attached to the adherend by reciprocating once with a 2 kg roller, and left at 23 ° C. for 30 minutes, and then the initial 180-degree peel adhesive strength is measured at a tensile speed of 300 mm / min.

  Arbitrary appropriate thickness can be employ | adopted for the thickness of an adhesion layer by a use, use environment, etc. The thickness of the adhesive layer is preferably 10 μm or more. When the thickness of the pressure-sensitive adhesive layer is less than 10 μm, it is impossible to sufficiently follow the shape of the adherend, the adhesion area is reduced, and there is a possibility that sufficient pressure-sensitive adhesive force cannot be expressed. The upper limit of the thickness of the pressure-sensitive adhesive layer is preferably 300 μm or less from the viewpoint of handleability.

[A-3. Antifouling layer]
Any appropriate antifouling layer can be adopted as the antifouling layer as long as the effects of the present invention are not impaired. The antifouling layer is preferably a layer that can exhibit an antifouling effect without using an antifouling paint, and includes, for example, any appropriate resin having an antifouling effect. Examples of such a resin include a resin having a small surface energy such as a fluororesin, a silicone resin, a melamine resin, and an acrylic resin. Of these, silicone resins are preferred.

  When the antifouling layer contains a silicone resin, any appropriate content can be adopted as the content of the silicone resin in the antifouling layer depending on the content of other components such as an antifouling agent. When the antifouling layer contains a silicone resin, the content of the silicone resin in the antifouling layer is preferably 30 to 98% by weight, more preferably 40 to 97% by weight, still more preferably 45 to 96% by weight, particularly preferably. Is 50 to 95% by weight. When the content ratio of the silicone resin in the antifouling layer is less than 30% by weight, the mechanical properties of the antifouling layer may be deteriorated. When the content ratio of the silicone resin in the antifouling layer exceeds 98% by weight, the antifouling effect of the antifouling layer may not be sufficiently exhibited.

  Any appropriate silicone resin can be adopted as the silicone resin as long as the effects of the present invention are not impaired. Only one type of silicone resin may be used, or two or more types may be used. Such a silicone resin may be a silicone resin that is liquid at normal temperature, or may be a silicone resin that is solid at normal temperature. Such a silicone resin may be a one-component silicone resin that is dried alone, or a two-component silicone resin that contains a curing agent. In the present invention, among these, a one-component room temperature curable (RTV) resin and a two-component room temperature curable (RTV) resin are preferable. Examples of the one-component RTV resin include KE-3475, KE-45S, KE-445, KE-44, KE-441, KE-3497, and KE-4896 manufactured by Shin-Etsu Chemical Co., Ltd. . Examples of the two-component RTV resin include KE-66, KE-1031, and KE-1800 manufactured by Shin-Etsu Chemical Co., Ltd.

  In addition, from the viewpoint of improving the easy removal of deposits (for example, aquatic organisms) attached to the sheet surface, the deposits can be easily peeled off by elastic deformation of the resin surface due to water pressure during washing and removal. A silicone resin having physical properties is preferred. Such a silicone resin has a 100% modulus (tensile stress) of the silicone resin of preferably 0.1 to 10 MPa, more preferably 0.1 to 6 MPa. Such silicone resin is preferably soluble in an organic solvent.

  The antifouling layer may contain an antifouling agent. Only one type of antifouling agent may be used, or two or more types may be used. When the antifouling layer contains an antifouling agent, the antifouling agent moves to the surface of a matrix resin (for example, silicone resin) and covers the surface with an antifouling substance, thereby preventing the antifouling layer such as aquatic organisms. Since it suppresses adhesion to the surface and is non-hydrolyzable, it can exhibit an effect of maintaining a high antifouling effect for a long period of time.

  When the antifouling layer contains an antifouling agent, the content of the antifouling agent in the antifouling layer is preferably 2% by weight or more, more preferably 2 to 200% by weight, and even more preferably 3 to 150% by weight. %, Particularly preferably 4 to 120% by weight, most preferably 5 to 100% by weight. When the content of the antifouling agent relative to the resin is less than 2% by weight, the antifouling effect of the antifouling layer may not be sufficiently exhibited. When the content of the antifouling agent with respect to the resin exceeds 200% by weight, the appearance of the final molded product or the film may be poor, and the strength of the antifouling layer is lowered and the antifouling property cannot be maintained. There is a fear.

  As the antifouling agent, any appropriate antifouling agent can be adopted as long as the effects of the present invention are not impaired. Examples of such an antifouling agent include silicone oil, liquid paraffin, surfactant, wax, petrolatum, animal fats, fatty acids and the like. In the present invention, the antifouling agent is preferably at least one selected from silicone oil, liquid paraffin, and surfactant.

  The silicone oil is preferably one that does not have reactivity with the silicone resin or self-condensation. As such a silicone oil, any appropriate silicone oil can be adopted as long as the effects of the present invention are not impaired. Such a silicone oil is preferably incompatible with the organopolysiloxane contained in the silicone resin to some extent, and is represented by, for example, the general formula (I) in that the antifouling effect can be maintained over a long period of time. Silicone oil is preferred.

In general formula (I), R ¹ is the same or different and represents an alkyl group having 1 to 10 carbon atoms, an aryl group, an aralkyl group, a fluoroalkyl group, a polyether group, or a hydroxyl group, and R ² is the same or Differently, it represents an alkyl group having 1 to 10 carbon atoms, an aryl group, an aralkyl group, a polyether group or a fluoroalkyl group, and n represents an integer of 0 to 150.

R ¹ in the general formula (I) is preferably a methyl group, a phenyl group, or a hydroxyl group. R ² in the general formula (I) is preferably a methyl group, a phenyl group, or a 4-trifluorobutyl group.

  The silicone oil represented by the general formula (I) has a number average molecular weight of preferably 180 to 20000, more preferably 1000 to 10,000.

  The viscosity of the silicone oil represented by the general formula (I) is preferably 10 to 10000 centistokes, more preferably 100 to 5000 centistokes.

As the silicone oil represented by the general formula (I), specifically, for example, terminal hydroxyl group-containing dimethyl silicone oil R ¹ at both ends or one end is a hydroxyl group, all of R ¹ and R ² is a methyl group And dimethyl silicone oils in which some of the methyl groups of these dimethyl silicone oils are substituted with phenyl groups.

  Examples of commercially available silicone oils represented by the general formula (I) include KF96L, KF96, KF69, KF99, KF50, KF54, KF410, KF412, KF414, FL, Toray Dow Corning manufactured by Shin-Etsu Chemical Co., Ltd. Examples include BY16-846, SF8416, SH203, SH230, SF8419, FS1265, SH510, SH550, SH710, FZ-2110, and FZ-2203 manufactured by Corporation.

  Examples of the surfactant include an anionic surfactant, a cationic surfactant, and a nonionic surfactant.

  As antifouling agents, diatomaceous adhesion inhibitors, agricultural chemicals, pharmaceuticals (such as medetomidine), enzyme activity inhibitors (such as alkylphenols and alkylresorcinols), and biological repellents may be used. By using these antifouling agents, the adhesion preventing effect of aquatic organisms such as diatoms and barnacles is further improved.

  The antifouling layer may contain any appropriate other additive as long as the effects of the present invention are not impaired.

  Arbitrary appropriate thickness can be employ | adopted for the thickness of a pollution protection layer according to a use, use environment, etc. The thickness of the antifouling layer is preferably 5 to 500 μm. When the thickness of the antifouling layer is less than 5 μm, the period during which the antifouling effect is effective is shortened and may not be practical. If the antifouling layer is thicker than 500 μm, the antifouling pressure-sensitive adhesive sheet becomes thick and increases in weight, resulting in poor handling, large irregularities at the overlapping portions of the sheets, and there is a risk of contamination.

[A-4. Method for producing antifouling pressure-sensitive adhesive sheet]
The antifouling pressure-sensitive adhesive sheet can be produced by any appropriate method. As such a method, for example, a method of forming an antifouling layer by applying an antifouling layer forming material on the base material layer after laminating a separately prepared base material layer and an adhesive layer, A method of forming an adhesive layer by applying an adhesive layer forming material on one surface and forming an antifouling layer by applying an antifouling layer forming material on the other surface of the base material layer; Examples thereof include a method in which an adhesive layer forming material is coextruded to form a base material layer / adhesive layer laminate, and then an antifouling layer forming material is applied onto the base material layer to form an antifouling layer.

  Examples of the method for applying the antifouling layer forming material on the base material layer include spraying, brushing, roller, curtain flow, roll, dip and the like. The antifouling layer-forming material is applied onto the base material layer by these methods, and the antifouling layer is formed, for example, by drying at a temperature from room temperature to 250 ° C. (preferably from room temperature to 180 ° C.). can do.

[B. Easy-adhesive adhesive tape]
FIG. 2 is a schematic cross-sectional view of an example of an easily adhesive pressure-sensitive adhesive tape that can be used in the antifouling treatment method of the present invention. The easily adhesive pressure-sensitive adhesive tape 20 a includes a base material layer 21 and a first pressure-sensitive adhesive layer 22 provided on one side of the base material layer 21. Although not shown, a release film may be provided on the surface of the first adhesive layer 22 of the easy-adhesive adhesive tape 20a. FIG. 3 is a schematic cross-sectional view of another example of an easily adhesive pressure-sensitive adhesive tape that can be used in the antifouling treatment method of the present invention. The easily adhesive pressure-sensitive adhesive tape 20 b includes a base material layer 21, a first pressure-sensitive adhesive layer 22 provided on one side of the base material layer 21, and a second pressure-sensitive adhesive layer 22 ′ provided on the other side. Although not shown, a release film may be provided on the surface of the first adhesive layer 22 and / or the second adhesive layer 22 ′ of the easily adhesive pressure-sensitive adhesive tape 20b.

  The easy-adhesive pressure-sensitive adhesive tape preferably has a high adhesive force to the antifouling layer surface of the antifouling pressure-sensitive adhesive sheet. Specifically, the adhesive force of the easy-adhesive pressure-sensitive adhesive tape is preferably 1 N / 20 mm when the easy-adhesive pressure-sensitive adhesive tape is applied so that the first pressure-sensitive adhesive layer is in contact with the antifouling layer surface of the antifouling pressure-sensitive adhesive sheet. As mentioned above, More preferably, it is 1.2 N / 20mm or more, More preferably, it is 1.5 N / 20mm or more. If it is such adhesive force, peeling from the overlap part of antifouling adhesive sheets can be prevented suitably. In addition, since the antifouling pressure-sensitive adhesive sheet and the easy-adhesive pressure-sensitive adhesive tape may be peeled together from the surface of the structure at the time of peeling and removing, the antifouling layer and the first pressure-sensitive adhesive layer have reached adhesion, Both may be integrated. Therefore, the upper limit of the adhesive force of the easily adhesive pressure-sensitive adhesive tape to the antifouling pressure-sensitive adhesive sheet (adhesive force when the first adhesive layer is attached so as to contact the antifouling layer) is not particularly set.

  The adhesive strength of the above easy-adhesive pressure-sensitive adhesive tape to the antifouling pressure-sensitive adhesive sheet (adhesive strength when the first pressure-sensitive adhesive layer is attached so as to contact the antifouling layer) can be measured, for example, as follows. it can. That is, an antifouling pressure-sensitive adhesive sheet is stuck on a SUS plate or the like as a support. With the antifouling layer surface as an adherend, an easy-adhesive pressure-sensitive adhesive tape is applied, and a 180 ° peel test is carried out at a tensile speed of 300 mm / min.

  The thickness of the easy-adhesive pressure-sensitive adhesive tape is set to any appropriate thickness as long as the effects of the present invention are not impaired by the thickness of each layer included therein. The thickness of the easily adhesive pressure-sensitive adhesive tape is preferably 50 to 5000 μm.

  Arbitrary appropriate length can be employ | adopted for the length of the long side and short side of an easily-adhesive adhesive tape according to a use, use environment, etc. From the viewpoint of firmly adhering to the antifouling pressure-sensitive adhesive sheet, the length (width) of the short side may be, for example, 1 cm to 50 cm, preferably 2 cm to 30 cm.

[B-1. Base material layer]
The base material layer is formed using any appropriate material. The base material layer preferably contains an elastomer resin. As the elastomer resin, A-1. The elastomer resin described in the item can be used. Of these, urethane elastomers such as ester polyurethane, ether polyurethane and polyurethane acrylic resin are preferred. The elastomer resin in the base material layer may be only one type or two or more types. When the base material layer contains the elastomer resin, the easy-adhesive pressure-sensitive adhesive tape can be easily attached to a portion other than a flat surface such as a curved surface or an acute angle surface with good workability. In addition, appearance defects such as wrinkles and floats hardly occur on the surface after application.

  The content ratio of the elastomer resin in the base material layer is preferably 50% by weight or more, more preferably 60 to 100% by weight, still more preferably 70 to 99% by weight, and particularly preferably 80 to 98% by weight. %, Most preferably 90 to 97% by weight.

  The base material layer may contain any appropriate additive as long as the effects of the present invention are not impaired. As an additive and its content rate, A-1. Additives described in the section and content ratios thereof can be applied.

  In one embodiment, the same material as the base material layer of the antifouling pressure-sensitive adhesive sheet can be used as the base material layer of the easily adhesive pressure-sensitive adhesive tape.

  Arbitrary appropriate thickness can be employ | adopted for the thickness of a base material layer according to the objective. The thickness of a base material layer becomes like this. Preferably it is 1-1000 micrometers, More preferably, it is 10-800 micrometers, More preferably, it is 20-500 micrometers. By keeping the thickness of the base material layer within the above range, the easy-adhesive pressure-sensitive adhesive tape can be easily applied to a portion other than a flat surface such as a curved surface or an acute angle surface with good workability. In addition, appearance defects such as wrinkles and floats hardly occur on the surface after application.

[B-2. First adhesive layer]
Any appropriate pressure-sensitive adhesive layer can be adopted as the first pressure-sensitive adhesive layer as long as the effects of the present invention are not impaired. Examples of the material for such an adhesive layer include acrylic resin adhesives, epoxy resin adhesives, amino resin adhesives, vinyl resin (vinyl acetate polymers, etc.) adhesives, and curable acrylic resin adhesives. Agents, silicone adhesives, and the like. Especially, since it has the outstanding adhesiveness with respect to the antifouling layer containing a silicone resin, a silicone type adhesive is used preferably. The material of the adhesive layer may be only one type or two or more types.

  The silicone-based pressure-sensitive adhesive typically includes a silicone rubber and a silicone resin. The silicone-based pressure-sensitive adhesive can be used as a partial condensate or a mixture of silicone rubber and silicone resin.

  As the silicone rubber, for example, various silicone rubbers containing polydiorganosiloxane as a constituent component can be used.

  Examples of the organic group of the polydiorganosiloxane include hydrocarbon groups such as an alkyl group, an aryl group, and an alkenyl group. Examples of the alkyl group include methyl, ethyl, propyl and the like, and a methyl group is preferably used from the viewpoints of adhesive properties and durability. Examples of the aryl group include a phenyl group. When an addition reaction is used as a method for crosslinking the silicone pressure-sensitive adhesive, it is preferable to copolymerize an alkenyl group. Examples of the alkenyl group include a vinyl group, an allyl group, a butenyl group, and a hexenyl group. Among these, a vinyl group is preferably used. In addition, various functional groups such as hydroxyl groups may be introduced into the polydiorganosiloxane. In particular, those having hydroxyl groups at both ends can be preferably used.

  Examples of the polydiorganosiloxane include polydimethylsiloxane, polydiphenylsiloxane, and copolymers and mixtures thereof. Among these, polydiorganosiloxane having dimethylsiloxane as a main constituent unit can be preferably used. Polydiorganosiloxane can be used alone or in combination of two or more.

  The polymerization degree of polydiorganosiloxane is, for example, 500 to 10,000, preferably 2000 to 8000.

A silicone resin is a branched polyorganosiloxane containing a hydroxyl group bonded to a silicon atom in the molecule. For example, at least one unit selected from M unit (R ₃ SiO _1/2 ), Q unit (SiO ₂ ), T unit (RSiO _3/2 ), and D unit (R ₂ SiO) (said unit) Among them, polyorganosiloxane composed of a copolymer having a monovalent hydrocarbon group or hydroxyl group) can be preferably used. In addition to having a hydroxyl group, the polyorganosiloxane made of the copolymer may have various functional groups such as vinyl groups introduced as necessary. The functional group to be introduced may cause a crosslinking reaction. The copolymer is preferably an MQ resin comprising M units and Q units. Silicone resins can be used alone or in combination of two or more.

  The ratio (molar ratio) between the M unit and the Q unit, T unit or D unit is preferably the former: the latter = about 0.3: 1 to 1.5: 1, preferably 0.5: 1 to 1. It is about 3: 1.

  The blending ratio (weight ratio) of the silicone rubber and the silicone resin is preferably 60 to 250 parts by weight, more preferably 80 to 200 parts by weight with respect to 100 parts by weight of the silicone rubber. The silicone rubber and the silicone resin may be used simply by blending them or may be a partial condensate thereof.

  The silicone-based pressure-sensitive adhesive may be a crosslinked structure. As the crosslinking agent for forming a crosslinked structure, a peroxide-based crosslinking agent and a siloxane-based crosslinking agent having a SiH group are suitable. According to the peroxide-based crosslinking agent, it is radical reaction type crosslinking. On the other hand, the siloxane-based crosslinking agent is an addition reaction type crosslinking using a hydrosilylation reaction between an alkenyl group such as a vinyl group and a polyorganohydrogensiloxane. When a siloxane-based crosslinking agent is used, polyorganosiloxane having a vinyl group is used as silicone rubber or the like. The vinyl group content is preferably about 0.0001 to 0.01 mol / 100 g.

  As the peroxide-based cross-linking agent, any appropriate peroxide-based cross-linking agent conventionally used for silicone-based pressure-sensitive adhesives can be used. Specific examples include benzoyl peroxide, t-butylperoxybenzoate, dicumyl peroxide, t-butylcumyl peroxide, t-butyl oxide, 2,5-dimethyl-2,5-di-t-butylperoxy Hexane, 2,4-dichloro-benzoyl peroxide, di-t-butylperoxy-diisopropylbenzene, 1,1-bis (t-butylperoxy) -3,3,5-trimethyl-cyclohexane, 2, 5-dimethyl-2,5-di-t-butylperoxyhexyne-3 etc. are mentioned. The usage-amount of a peroxide type crosslinking agent is about 0.15-2 weight part normally with respect to 100 weight part of silicone rubbers, Preferably it is 0.5-1.4 weight part.

  As the siloxane-based crosslinking agent, for example, polyorganohydrogensiloxane having an average of at least two hydrogen atoms bonded to silicon atoms in the molecule is used. Examples of the organic group bonded to the silicon atom include an alkyl group, a phenyl group, and a halogenated alkyl group. Of these, a methyl group is preferred because it is easy to synthesize and handle. The siloxane skeleton structure may be linear, branched or cyclic, but the linear structure is preferably used.

  The amount of siloxane-based crosslinking agent used is usually 1 to 30 hydrogen atoms bonded to silicon atoms, preferably 4 to 17 with respect to one vinyl group in silicone rubber and silicone resin. To do. When the number of hydrogen atoms bonded to the silicon atom is less than 1, sufficient cohesive force cannot be obtained, and when it exceeds 30, the adhesive property tends to deteriorate.

  Any suitable catalyst can be used when a siloxane-based crosslinking agent is used. Among these, a platinum catalyst can be preferably used.

  The silicone-based pressure-sensitive adhesive may further include any appropriate additive as required.

  Arbitrary appropriate thickness can be employ | adopted for the thickness of a 1st adhesion layer by a use, use environment, etc. The thickness of the first adhesive layer is preferably 10 μm or more. When the thickness of the first adhesive layer is thinner than 10 μm, there is a possibility that sufficient adhesive force cannot be expressed. The upper limit of the thickness of the first adhesive layer is preferably 300 μm or less from the viewpoint of handleability.

[B-3. Second adhesive layer]
Any appropriate pressure-sensitive adhesive layer can be adopted as the second pressure-sensitive adhesive layer as long as the effects of the present invention are not impaired. Examples of the material for such an adhesive layer include acrylic resin adhesives, epoxy resin adhesives, amino resin adhesives, vinyl resin (vinyl acetate polymers, etc.) adhesives, and curable acrylic resin adhesives. Agents, silicone adhesives, and the like. The material of the adhesive layer may be only one type or two or more types.

  Arbitrary appropriate thickness can be employ | adopted for the thickness of a 2nd adhesion layer by a use, use environment, etc. The thickness of the second adhesive layer is preferably 10 μm or more. When the thickness of the second adhesive layer is thinner than 10 μm, there is a possibility that sufficient adhesive force cannot be expressed. The upper limit of the thickness of the second adhesive layer is preferably 300 μm or less from the viewpoint of handleability.

[B-4. Manufacturing method of easy-adhesive adhesive tape]
The easily adhesive pressure-sensitive adhesive tape can be produced by any appropriate method. As such a method, for example, a method in which a separately prepared base material layer and a first adhesive layer are bonded together, a first adhesive layer forming material is applied to one surface of the base material layer, and the first A method of forming an adhesive layer, a separately prepared base material layer and a first adhesive layer are bonded together, and then a second adhesive layer forming material is applied onto the base material layer to form a second adhesive layer Method: Applying a first adhesive layer forming material on one surface of a base material layer to form a first adhesive layer, and applying a second adhesive layer forming material on the other surface of the base material layer And a method of forming the second adhesive layer.

  In the case of forming a silicone-based pressure-sensitive adhesive layer, the forming material is dissolved in a solvent such as toluene, the obtained solution is applied to a substrate, and further heated (crosslinked) as necessary. Alternatively, a silicone pressure-sensitive adhesive layer may be provided on the release liner and transferred to the substrate. The heating temperature is not particularly limited and is appropriately determined in consideration of the type of the crosslinking agent and the like. In forming the silicone-based pressure-sensitive adhesive layer on the base material, an undercoat can be used to improve anchoring properties between the base material and the silicone-based pressure-sensitive adhesive layer.

[C. Antifouling treatment method]
In the antifouling treatment method of the present invention, the antifouling pressure-sensitive adhesive sheet is affixed to the surface of the structure so that a part thereof overlaps with a part of another adjacent antifouling pressure-sensitive adhesive sheet via an easily adhesive pressure-sensitive adhesive tape. Including that. When the adjacent antifouling pressure-sensitive adhesive sheets are directly stacked and pasted, due to the surface characteristics of the antifouling layer, sufficient adhesive force cannot be obtained at the overlapping portion, and as a result, peeling occurs from the overlapping portion. . On the other hand, when the antifouling pressure-sensitive adhesive sheet is stacked via the easy-adhesive pressure-sensitive adhesive tape, the first pressure-sensitive adhesive layer of the easy-adhesive pressure-sensitive adhesive tape can firmly adhere to the antifouling layer, and the easy-adhesive pressure-sensitive adhesive tape. The base material layer or the second adhesive layer of the tape and the adhesive layer of the antifouling adhesive sheet can be firmly bonded. As a result, peeling from the overlapping portion can be suitably prevented.

  4 (a) and 4 (b) are schematic diagrams for explaining the antifouling treatment method of the present invention. In the embodiment illustrated in FIG. 4A, a plurality of antifouling pressure-sensitive adhesive sheets (10, 10 ′, 10 ″) are shifted while being shifted so that the end portions thereof overlap with each other via the easily adhesive pressure-sensitive adhesive tape 20a. Affix to the surface of the object 30. The order of application is not particularly limited. For example, the first antifouling pressure-sensitive adhesive sheet 10 is attached to the structure 30, and then an easily adhesive pressure-sensitive adhesive tape is attached to one end (right end in the figure). 20a may be affixed, and then the second antifouling adhesive sheet 10 ′ may be affixed so as to cover the easily adhesive pressure-sensitive adhesive tape 20a. Alternatively, the first antifouling pressure-sensitive adhesive sheet 10 is affixed to the structure 30, and then the easy-adhesive pressure-sensitive adhesive tape 20 a is affixed in advance to one end (the left end in the figure). The antifouling pressure-sensitive adhesive sheet 10 ′ may be attached to the end of the first antifouling pressure-sensitive adhesive sheet 10 (the right-side end in the figure). The embodiment illustrated in FIG. 4B is the same as the embodiment of FIG. 4A except that a double-sided adhesive tape 20b is used instead of the easy-adhesive tape 20a. is there. Thus, by using the easy-adhesive pressure-sensitive adhesive tape 20a or 20b including the first pressure-sensitive adhesive layer 22 having excellent adhesion to the antifouling layer, the problem of peeling from the overlapping portion is suppressed, and the antifouling property is used. An adhesive sheet can be overlaid.

  In addition, in embodiment illustrated by FIG. 4 (a) and (b), one edge part is on the antifouling adhesive sheet which adjoins, and the other edge part is under the antifouling adhesive sheet which adjoins. The antifouling adhesive sheet is affixed and attached so that the both ends are under the adjacent antifouling adhesive sheet (for example, first An antifouling pressure-sensitive adhesive sheet 10 'is affixed to both ends, and an easy-adhesive pressure-sensitive adhesive tape (20a or 20b) is affixed to both ends thereof. Adhesive sheet 10 is affixed, and antifouling adhesive sheet 10 '' is affixed to the other end. Thus, both ends of antifouling adhesive sheet 10 'are under antifouling adhesive sheets 10 and 10' '. Become). Alternatively, the two antifouling pressure-sensitive adhesive sheets may be affixed on both ends (for example, the antifouling pressure-sensitive adhesive sheets 10 and 10 ″ are affixed at intervals smaller than the sheet width). Then, the antifouling pressure-sensitive adhesive sheet 10 ′ is pasted on the antifouling pressure-sensitive adhesive sheets 10 and 10 ″ via the easily adhesive pressure-sensitive adhesive tape so as to cover the interval. Are both on the antifouling pressure-sensitive adhesive sheets 10 and 10 ″).

  The width of the overlapping portion of the antifouling pressure-sensitive adhesive sheet is typically less than or equal to the width of the easily adhesive pressure-sensitive adhesive tape, and preferably approximately the same as the width of the easily adhesive pressure-sensitive adhesive tape. The width of the overlapping portion may be, for example, 1 cm to 50 cm, preferably 2 cm to 30 cm. If it is such a width | variety, peeling from an overlap part can be prevented suitably.

  The structure to which the antifouling treatment method of the present invention is applied may be any suitable structure as long as it has a surface to be prevented from being contaminated. Examples of such structures include ships, buoys, harbor facilities, offshore oil field facilities, underwater structures such as cooling water supply channels for power plants, cooling water supply channels for factories, propellers for wind power generation, piers, buildings, automobiles, etc. , Heavy machinery and aircraft, and preferably an underwater structure. The surface of the structure may be coated with an antifouling paint or an anticorrosive paint.

  When applying the antifouling treatment method of the present invention to a ship, a plurality of strip-like antifouling adhesive sheets may be laminated and pasted via an easy-adhesive adhesive tape so as to extend in a direction substantially perpendicular to the traveling direction. preferable. At this time, more preferably, of the two adjacent antifouling adhesive sheets, the stern side edge of the antifouling adhesive tape on the bow side is the stern side edge of the antifouling adhesive sheet on the stern side. Overlay so that it is on top. By sticking in this way, the overlapping portion can be protected from water flow resistance, and peeling from the overlapping portion can be more suitably prevented.

  Examples of the present invention will be described below, but the present invention is not limited thereto.

[Production Example 1: Preparation of antifouling adhesive sheet]
(Preparation of adhesive layer)
In a reaction vessel equipped with a cooling pipe, a nitrogen introduction pipe, a thermometer, and a stirrer, 2-ethylhexyl acrylate (2EHA, manufactured by Toa Gosei Co., Ltd.) as a (meth) acrylic monomer: 90 parts by weight, acrylic acid (AA ): 10 parts by weight, 2,2-dimethoxy-1,2-diphenylethane-1-one (trade name “Irgacure 651”, manufactured by BASF Corp.): 0.1 part by weight as a photopolymerization initiator The mixture was stirred and irradiated with UV from above in a nitrogen stream while stirring to convert some of the monomers into polymers and adjust the viscosity to be coatable to obtain a (meth) acrylic monomer mixture. To this (meth) acrylic monomer mixture, 1,6-hexanediol diacrylate (HDDA): 0.08 part by weight is added as a crosslinking agent, and this is added to a separator (trade name “MRF38”, manufactured by Mitsubishi Plastics, Inc.). , 50 μm thick) with an applicator, and a cover separator (trade name “MRF38”, manufactured by Mitsubishi Plastics Co., Ltd., 38 μm thick) is bonded with a hand roller, and ultraviolet rays are emitted from an ultraviolet lamp (BL type). By irradiation (ultraviolet illuminance: 3.4 mW / cm ² , integrated irradiation amount: 2000 mJ / cm ² ), an adhesive layer (1-A) having a thickness of 50 μm was obtained.

(Preparation of base material layer)
In a reaction vessel equipped with a condenser, a thermometer, and a stirrer, as a (meth) acrylic monomer, isobornyl acrylate (trade name “IBXA”, manufactured by Osaka Organic Chemical Industry Co., Ltd.): 71 parts by weight, n -Butyl acrylate (BA, manufactured by Toagosei Co., Ltd.): 19 parts by weight, acrylic acid (AA): 10 parts by weight, poly (oxytetramethylene) glycol having a number average molecular weight of 650 as a polyol (PTMG650, Mitsubishi Chemical Corporation) Manufactured): 68.4 parts by weight, dibutyltin dilaurate (DBTL): 0.01 parts by weight as a catalyst, and hydrogenated xylylene diisocyanate (HXDI, manufactured by Mitsui Chemicals Polyurethane Co., Ltd.): 25. 5 parts by weight were dropped and reacted at 65 ° C. for 5 hours to obtain a urethane polymer- (meth) acrylic monomer mixture. Thereafter, hydroxyethyl acrylate (trade name “Acrix HEA”, manufactured by Toa Gosei Co., Ltd.): 6.1 parts by weight was added and reacted at 65 ° C. for 1 hour, whereby acryloyl group-terminated urethane polymer (meth). An acrylic monomer mixture was obtained.
The obtained acryloyl group-terminated urethane polymer- (meth) acrylic monomer mixture is mixed with trimethylolpropane triacrylate (TMPTA): 5 parts by weight, and diphenyl (2,4,6, -trimethoxybenzoyl) phosphine as a photopolymerization initiator. Oxide (trade name “Lucirin TPO”, manufactured by BASF Corporation): 0.25 parts by weight, UV absorber (trade name “TINUVIN123”, manufactured by BASF Corporation): 1.25 parts by weight, antioxidant (commodities) Name “TINUVIN400” (manufactured by BASF Corporation): A syrup was obtained by adding 0.6 parts by weight.
The obtained syrup was coated on the surface of a separator (trade name “MRF38”, manufactured by Mitsubishi Plastics, Inc., thickness 38 μm) with an applicator to form a syrup layer having a thickness of 150 μm. A cover separator (trade name “MRF38”, manufactured by Mitsubishi Plastics Co., Ltd., thickness 38 μm) is bonded onto this syrup layer with a hand roller, and further irradiated with ultraviolet rays (ultraviolet illuminance: 3.4 mW) by an ultraviolet lamp (BL type). / Cm ² , cumulative irradiation amount: 2000 mJ / cm ² ) to obtain a base material layer (1-B).

(Preparation of antifouling adhesive sheet)
Apply an antifouling paint composition (manufactured by China Paint Co., Ltd., product name “Peracrine”) on one side of the base material layer (1-B) using an applicator so that the thickness after drying becomes 100 μm. And dried at 150 ° C. for 10 minutes to form an antifouling layer. Subsequently, the adhesive layer (1-A) was bonded to the other surface of the base material layer with a hand roller to obtain an antifouling adhesive sheet 1. The configuration of the obtained antifouling pressure-sensitive adhesive sheet 1 was antifouling layer (thickness: 100 μm) / base material layer (thickness: 150 μm) / adhesive layer (thickness: 50 μm). The width of the antifouling pressure-sensitive adhesive sheet was 20 cm.

[Production Example 2: Preparation of easy-adhesive pressure-sensitive adhesive tape 1]
(Production of first adhesive layer)
100 parts of polydimethylsiloxane having a degree of polymerization of 4000 having hydroxyl groups at both ends, and a composition ratio of M unit ((CH ₃ ) ₃ SiO _1/2 ) 0.8 mol part to 1 mol part of Q unit (SiO ₂ ) 100 parts of a hydroxyl group-containing branched polymethylsiloxane consisting of was partially condensed in toluene in the presence of sodium hydroxide. Subsequently, the toluene solution of the silicone type adhesive was obtained by neutralizing with phosphoric acid. To the obtained toluene solution, 1 part of benzoyl peroxide was added as a curing agent to 100 parts of the solid content of the silicone-based adhesive to obtain an adhesive solution. This solution was applied to the surface of a separator (trade name “MRF38”, manufactured by Mitsubishi Plastics Co., Ltd., thickness 50 μm) to a dry thickness of 50 μm, dried at 150 ° C. for 3 minutes, and an adhesive containing a silicone-based adhesive. Layer (2-A) was obtained.

(Preparation of base material layer)
In the same manner as in the production of the base material layer in Production Example 1, a base material layer (2-B) was obtained.

(Preparation of easy-adhesive adhesive tape)
The first adhesive layer (2-A) and the base material layer (2-B) were bonded together with a hand roller to obtain an easy-adhesive adhesive tape 1. The configuration of the easily adhesive pressure-sensitive adhesive tape 1 was base material layer (thickness: 150 μm) / first pressure-sensitive adhesive layer (thickness: 50 μm). Moreover, the width | variety of the easily-adhesive adhesive tape 1 was 3 cm.

[Production Example 3: Preparation of easy-adhesive adhesive tape 2]
(Production of first adhesive layer)
In the same manner as the production of the first adhesive layer in Production Example 2, an adhesive layer (3-A) was obtained.

(Preparation of base material layer)
In the same manner as in the production of the base material layer in Production Example 1, a base material layer (3-B) was obtained.

(Production of second adhesive layer)
N-butyl acrylate: vinyl acetate: acrylic acid: 2-hydroxyethyl acrylate = 92.5: 4.6: 2.8: 0.1 (weight ratio) 0.2 parts of '-azobis-isobutyronitrile was added and polymerized in toluene to obtain an acrylic copolymer solution having a weight average molecular weight of 500,000. To the copolymer solution, 15 parts of rosin phenolic resin, 25 parts of rosin resin, and 2 parts of isocyanate crosslinking agent are added and mixed with respect to 100 parts of the solid content of the copolymer, and an acrylic pressure-sensitive adhesive composition is prepared. Prepared. The pressure-sensitive adhesive composition was applied to the surface of a separator (trade name “MRF38”, manufactured by Mitsubishi Plastics Co., Ltd., thickness 50 μm) so that the dry thickness was 50 μm, and dried at 100 ° C. for 3 minutes for acrylic pressure-sensitive adhesive. An adhesive layer (3-C) containing an agent was obtained.

(Preparation of easy-adhesive adhesive tape)
The first adhesive layer (3-A) is bonded to one surface of the base material layer (3-B) with a hand roller, and then the second adhesive layer (3-B) is bonded to the other surface of the hand roller. To obtain an easy-adhesive pressure-sensitive adhesive tape 2. The configuration of the easily adhesive pressure-sensitive adhesive tape 2 was second pressure-sensitive adhesive layer (thickness: 50 μm) / base material layer (thickness: 150 μm) / first pressure-sensitive adhesive layer (thickness: 50 μm). Moreover, the width | variety of the easily-adhesive adhesive tape 2 was 3 cm.

[Example 1]
An antifouling treatment method was applied to a boat having a steel plate surface coated with an anticorrosion paint (manufactured by China Paint Co., Ltd., product name “Banno 500”) in the embodiment shown in FIG. Specifically, it is as follows. First, the 1st antifouling adhesive sheet 1 was affixed in the direction orthogonal to the advancing direction near the stern of a boat. Next, the easy-adhesive pressure-sensitive adhesive tape 1 was affixed so that the ends on the bow side of each other were aligned. Next, the second antifouling pressure-sensitive adhesive sheet 1 was affixed on the easy-adhesive pressure-sensitive adhesive tape 1 so that the ends on the stern side of each other were aligned. In this way, a plurality of antifouling pressure-sensitive adhesive sheets 1 were laminated and pasted sequentially through the easily adhesive pressure-sensitive adhesive tape 1 from the stern of the boat toward the bow.

≪Peel test≫
The antifouling treatment boat of Example 1 was moved to the sea and sailed about 50 km at 25 knots once a week. One month later (number of voyages: 4), the state of sticking of the antifouling pressure-sensitive adhesive sheet on the surface of the boat was visually confirmed and evaluated according to the following criteria. The results are shown in Table 1.
○: Peeling does not occur at the overlapping part of the antifouling adhesive sheet ×: Peeling occurs at the overlapping part of the antifouling adhesive sheet

≪Workability evaluation≫
The workability when applying the antifouling treatment method of Example 1 was evaluated according to the following criteria. The results are shown in Table 1.
○: Workability is good and construction can be done in a short time. The finished appearance is good. There is no film lift that would cause resistance.
(Triangle | delta): Workability | operativity is bad, and construction takes time, and / or a wrinkle is seen in a finished external appearance.
X: The finished appearance has wrinkles, floats, and the like.

≪Adhesive strength evaluation≫
The adhesive strength of the overlapping portion of the antifouling pressure-sensitive adhesive sheet in the boat subjected to the antifouling treatment of Example 1 was evaluated using an evaluation model. Specifically, a SUS plate was used as a support, and an antifouling adhesive sheet was attached thereto. The adhesive force of the overlapping portion was evaluated by applying an easy-adhesive pressure-sensitive adhesive tape with the antifouling layer surface as an adherend and performing a 180 degree peel test at a tensile speed of 300 mm / min. The results are shown in Table 1.

[Example 2]
An antifouling treatment method was applied to a boat having a steel plate surface coated with an anticorrosion paint (manufactured by China Paint Co., Ltd., product name “Banno 500”) in an embodiment as shown in FIG. Specifically, it is as follows. First, the 1st antifouling adhesive sheet 1 was affixed in the direction orthogonal to the advancing direction near the stern of a boat. Subsequently, the easy-adhesive adhesive tape 2 was affixed on it so that the ends on the bow side of each other were aligned. At this time, the first adhesive layer was stuck so as to be in contact with the antifouling layer. Next, the second antifouling pressure-sensitive adhesive sheet 1 was stuck on the easy-adhesive pressure-sensitive adhesive tape 2 (that is, on the second pressure-sensitive adhesive layer) so as to align the ends on the stern side. In this way, a plurality of antifouling adhesive sheets 1 were sequentially laminated and pasted through the easy-adhesive adhesive tape 2 from the stern of the boat toward the bow.

  In the same manner as in Example 1, a peel test, workability evaluation, and adhesive strength evaluation were performed. The results are shown in Table 1.

  As is apparent from Table 1, according to the antifouling treatment method of the present invention, it is possible to suitably prevent peeling of the overlapping portion. Moreover, the antifouling treatment method of the present invention is excellent in workability.

  The antifouling treatment method of the present invention can be suitably applied particularly to the prevention of contamination of the structure surface.

10 Antifouling Adhesive Sheet 20 Easy Adhesive Adhesive Tape 30 Structure

Claims (5)

Affixing the antifouling adhesive sheet to the surface of the structure so that a part of the adhesive sheet overlaps with a part of another adjacent antifouling adhesive sheet via an easy-adhesive adhesive tape. A processing method,
The antifouling pressure-sensitive adhesive sheet comprises a base material layer, an adhesive layer provided on one side of the base material layer, and an antifouling layer provided on the other side,
The antifouling treatment method, wherein the easily adhesive pressure-sensitive adhesive tape comprises a base material layer and a first pressure-sensitive adhesive layer provided on one side of the base material layer. The antifouling layer of the antifouling pressure-sensitive adhesive sheet contains a silicone resin,
The antifouling treatment method for a structure according to claim 1, wherein the first adhesive layer of the easy-adhesive adhesive tape contains a silicone-based adhesive.   The antifouling treatment method for a structure according to claim 1 or 2, wherein the easily adhesive pressure-sensitive adhesive tape further comprises a second pressure-sensitive adhesive layer provided on the other side of the base material layer.   The antifouling treatment method for a structure according to any one of claims 1 to 3, wherein the base layer of the easily adhesive pressure-sensitive adhesive tape contains an elastomer resin. The antifouling treatment method for a structure according to any one of claims 1 to 4, wherein the structure is a ship.

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