Abstract: As a conventional antifouling measure to prevent adherence of aquatic organisms to a submersible sensor unit, a grease containing a stimulant, such as mustard, capable of repelling aquatic organisms is applied onto a sensing part thereof, thereby preventing adherence of the aquatic organisms. However, the irritant-containing grease applied onto the sensing part will come off within one to two months, resulting in disappearance of its effect. Thus, it is necessary to perform work of pulling up the submersible sensor unit and re-applying the grease, in each case. The present invention provides a water flow resistant submersible sensor unit which comprises an aquatic organism adherence preventive film capable of preventing adherence of aquatic organisms even when used in the submersible sensor unit for about half a year, almost without involving any underwater movement, and capable of, after use, being easily peeled off from the submersible sensor unit.

Abstract: The bushing includes an outer cylinder, an inner cylinder, and an elastic body therebetween. The outer cylinder has a central recess portion formed in a curved shape. The inner cylinder has a central convex portion being formed in a curved shape. A distance between a vertex of the central recess portion and the vertex of the central convex portion is smaller than a distance between a point other than the vertex of the central recess portion and a point at which a straight line extending from the point other than the vertex of the central recess portion to an intersection point of the perpendicular line and the axis of the inner cylinder intersects the central convex portion.

Abstract: The bushing includes an outer cylinder, an inner cylinder, and an elastic body therebetween. The outer cylinder has a central recess portion recessed from the inner peripheral surface in the radial direction at the central portion in the axial direction, and the thickness of both end portions is thicker than the thickness of the central portion. The central recess portion is formed in a curved shape or having a curved and a straight shape. The inner cylinder has a central convex portion swelling from the outer peripheral surface in the radial direction at a position corresponding to the central recess portion. The maximum outer diameter of the central convex portion is larger than the minimum inner diameter of the inner peripheral surface of the outer cylinder.

Abstract: Conventional aquatic organism adherence preventive films are designed for an underwater structure (mainly, a boat/ship or the like) capable of moving through water at relatively high speeds. That is, there has been no film capable of adequately preventing adherence of aquatic organisms to a sensor over a long period of time, and capable of being easily peeled off from a submersible sensor unit while preventing a pressure-sensitive adhesive from remaining on a housing of the submersible sensor unit. The present invention provides an aquatic organism adherence preventive film capable of preventing adherence of aquatic organisms even when used in an underwater structure receiving almost no a water flow resistance, e.g., an underwater structure involving almost no underwater movement, for about half a year, and capable of being easily peeled off from a submersible sensor unit while preventing a pressure-sensitive adhesive from remaining on a housing of the submersible sensor unit.

Abstract: A coating film capable of being peeled off in the shape of sheet to facilitate a coating film removal work, and is less likely to peel even after long periods of use on an underwater structure is provided. The coating film comprises an undercoat layer to be bonded to an underwater structure, and an antifouling layer bonded to the undercoat layer, wherein: a 100-gram underwater constant load peeling degree of the coating film is less than 5; a ratio of a tensile breaking strength of the coating film to an adhesive force of the coating film with respect to the underwater structure, as measured after immersing the coating film in pure water at 60° C. for 5 weeks is 1.5 or more; and a 1-mm square cross-cut stretching-caused peeling degree of the antifouling layer with respect to the undercoat layer is 0.05 or less.

Abstract: As a conventional antifouling measure to prevent adherence of aquatic organisms to a submersible sensor unit, a grease containing a stimulant, such as mustard, capable of repelling aquatic organisms is applied onto a sensing part thereof, thereby preventing adherence of the aquatic organisms. However, the irritant-containing grease applied onto the sensing part will come off within one to two months, resulting in disappearance of its effect. Thus, it is necessary to perform work of pulling up the submersible sensor unit and re-applying the grease, in each case. The present invention provides a water flow resistant submersible sensor unit which comprises an aquatic organism adherence preventive film capable of preventing adherence of aquatic organisms even when used in the submersible sensor unit for about half a year, almost without involving any underwater movement, and capable of, after use, being easily peeled off from the submersible sensor unit.

Abstract: The bushing includes an outer cylinder, an inner cylinder, and an elastic body therebetween. The outer cylinder has a central recess portion formed in a curved shape. The inner cylinder has a central convex portion being formed in a curved shape. A distance between a vertex of the central recess portion and the vertex of the central convex portion is smaller than a distance between a point other than the vertex of the central recess portion and a point at which a straight line extending from the point other than the vertex of the central recess portion to an intersection point of the perpendicular line and the axis of the inner cylinder intersects the central convex portion.

Abstract: The bushing includes an outer cylinder, an inner cylinder, and an elastic body therebetween. The outer cylinder has a central recess portion recessed from the inner peripheral surface in the radial direction at the central portion in the axial direction, and the thickness of both end portions is thicker than the thickness of the central portion. The central recess portion is formed in a curved shape or having a curved and a straight shape. The inner cylinder has a central convex portion swelling from the outer peripheral surface in the radial direction at a position corresponding to the central recess portion. The maximum outer diameter of the central convex portion is larger than the minimum inner diameter of the inner peripheral surface of the outer cylinder.

Abstract: An object of the present invention is to provide a coating film forming composition that can form a coating film stably exhibiting an inhibiting effect on the adhesion of aquatic organisms even in the presence of physical factors, for example, water flow in the water. The present invention relates to a coating film forming composition for forming a coating film, the coating film forming composition containing a silicone resin and a silicone oil, wherein a coating film formed of the coating film forming composition satisfies the following (1) and (2). (1) A water contact angle of the coating film after the elapse of 5 minutes after dropping water on the coating film is 80° or less. (2) A water contact angle of the coating film after the elapse of 5 minutes after bringing the coating film into contact with methanol for 3 hours, followed by dropping water on the coating film is 80° or less.

Abstract: The present invention provides a pressure-sensitive adhesive tape for preventing adhesion of aquatic organisms, which includes an antifouling layer, a base material layer and a pressure-sensitive adhesive layer in this order, which has the base material layer composed of an inexpensive material, and which has high adhesion between the antifouling layer and the base material layer without performing the easy adhesion treatment, for example, a primer treatment or a corona treatment. A pressure-sensitive adhesive tape for preventing adhesion of aquatic organisms of the present invention comprises an antifouling layer, a base material layer and a pressure-sensitive adhesive layer in this order, wherein the base material layer contains an ionomer resin.

Abstract: The present invention provides an anti-fouling pressure-sensitive adhesive sheet and anti-fouling treatment method capable of preventing peeling from overlapping portions when adjacent anti-fouling pressure-sensitive adhesive sheets are attached by allowing end portions thereof to overlap each other. The anti-fouling pressure-sensitive adhesive sheet of the present invention includes a base material layer; a pressure-sensitive adhesive layer provided on one side of the base material layer; and an anti-fouling layer provided on another side of the base material layer, wherein the anti-fouling pressure-sensitive adhesive sheet has, at an end portion thereof, a bonding margin including parts of the base material layer and the pressure-sensitive adhesive layer, the parts extending beyond the anti-fouling layer.

Abstract: The present invention provides a pressure-sensitive adhesive tape for preventing adhesion of aquatic organisms, which includes an antifouling layer, a base material layer and a pressure-sensitive adhesive layer in this order, which has the base material layer composed of an inexpensive material, and which has high adhesion between the antifouling layer and the base material layer without performing the easy adhesion treatment, for example, a primer treatment or a corona treatment. A pressure-sensitive adhesive tape for preventing adhesion of aquatic organisms of the present invention comprises an antifouling layer, a base material layer and a pressure-sensitive adhesive layer in this order, wherein the base material layer contains an ionomer resin.

Abstract: Provided is a pressure-sensitive adhesive tape for preventing adhesion of aquatic organisms, which can express good adhesion even in water, has good mechanical characteristics, facilitates its peeling operation, can maintain an antifouling effect over a long time period, has a small load on a human body or an environment, has a light weight, can maintain stable quality, and can effectively prevent adhesion of aquatic organisms. The pressure-sensitive adhesive tape for preventing adhesion of aquatic organisms of the present invention includes an antifouling layer, a base material layer, and a pressure-sensitive adhesive layer in the stated order, in which: the antifouling layer includes a silicone resin; the antifouling layer includes an antifouling agent; the antifouling agent essentially includes a silicone oil and a liquid paraffin; and the antifouling agent includes at least one kind selected from a surfactant, a liquid hydrocarbon, a fluorinated oil, and an antimicrobial agent.

Abstract: The present invention provides an anti-fouling pressure-sensitive adhesive sheet and anti-fouling treatment method capable of preventing peeling from overlapping portions when adjacent anti-fouling pressure-sensitive adhesive sheets are attached by allowing end portions thereof to overlap each other. The anti-fouling pressure-sensitive adhesive sheet of the present invention includes a base material layer; a pressure-sensitive adhesive layer provided on one side of the base material layer; and an anti-fouling layer provided on another side of the base material layer, wherein the anti-fouling pressure-sensitive adhesive sheet has, at an end portion thereof, a bonding margin including parts of the base material layer and the pressure-sensitive adhesive layer, the parts extending beyond the anti-fouling layer.

Abstract: Provided is a pressure-sensitive adhesive tape for preventing adhesion of an aquatic organism that: can express good adhesion even in water; has good mechanical characteristics; facilitates its peeling operation; has a small surface roughness; can maintain an antifouling effect over a long time period; has a small load on a human body or an environment; has a light weight; can maintain stable quality; can effectively prevent the adhesion of an aquatic organism; and when bonded onto a ship's hull, can make contributions to improving fuel efficiency and reducing CO2 emission. The pressure-sensitive adhesive tape for preventing adhesion of an aquatic organism of the present invention includes an antifouling layer, a base material layer, and a pressure-sensitive adhesive layer in the stated order, in which the antifouling layer has a ten-point average surface roughness Rz of 5.0 ?m or less.

Abstract: Provided is a pressure-sensitive adhesive tape for preventing adhesion of aquatic organisms excellent in impact resistance and capable of preventing damage to or loss of its antifouling layer due to a colliding object. A pressure-sensitive adhesive tape for preventing adhesion of aquatic organisms of the present invention includes an antifouling layer, a base material layer, and a pressure-sensitive adhesive layer in the stated order, in which the base material layer has an impact absorption rate of 10% or more.

Abstract: A pressure-sensitive adhesive tape for preventing adhesion of an aquatic organism including an antifouling layer, a base material layer, and a pressure-sensitive adhesive layer in the stated order, in which the antifouling layer includes a silicone resin. The pressure-sensitive adhesive tape can express good adhesion even in water; has good mechanical characteristics; facilitates its peeling operation; can maintain an antifouling effect over a long time period; has a small load on a human body or an environment; has a light weight; can maintain stable quality; and can effectively prevent the adhesion of an aquatic organism.

Abstract: A method of preventing fouling structure including: preparing an antifouling pressure-sensitive adhesive tape including a base material layer (A) and a pressure-sensitive adhesive layer (A), and an easily adhering pressure-sensitive adhesive tape including a base material layer (B) easily adhering to the pressure-sensitive adhesive layer (A) and a pressure-sensitive adhesive layer (B); bonding the easily adhering pressure-sensitive adhesive tape to a surface of a structure, and bonding the antifouling pressure-sensitive adhesive tape onto the bonded easily adhering pressure-sensitive adhesive tape so that lengthwise directions of the tapes are non-parallel with each other, or bonding the two or more antifouling pressure-sensitive adhesive tapes and the at least one easily adhering pressure-sensitive adhesive tape onto a surface of a structure so that the antifouling pressure-sensitive adhesive tapes are prevented from overlapping each other and a junction between the antifouling pressure-sensitive adhesive ta

Abstract: It is an object of the present invention to provide a composite semipermeable membrane having an excellent resistance property to contamination, particularly an excellent resistance property to microbial contamination, and a water treatment method using the composite semipermeable membrane. The present invention relates to a composite semipermeable membrane comprising a skin layer formed on the surface of a porous support and containing a polyamide-based resin obtained by reacting a polyfunctional amine component with a polyfunctional acid halide component, wherein an antibacterial layer containing a silver-based antibacterial agent and a polymer component is formed on the skin layer directly or with other layer interposed therebetween, and the weight ratio between the silver-based antibacterial agent and the polymer component in the antibacterial layer is 55:45 to 95:5 (silver-based antibacterial agent:polymer component).

Abstract: It is an object of the present invention to provide a composite semipermeable membrane having an excellent resistance property to contamination, particularly an excellent resistance property to microbial contamination, and a water treatment method using the composite semipermeable membrane. The present invention relates to a composite semipermeable membrane comprising a skin layer formed on the surface of a porous support and containing a polyamide-based resin obtained by reacting a polyfunctional amine component with a polyfunctional acid halide component, wherein an antibacterial layer containing a silver-based antibacterial agent and a polymer component is formed on the skin layer directly or with other layer interposed therebetween, and the weight ratio between the silver-based antibacterial agent and the polymer component in the antibacterial layer is 55:45 to 95:5 (silver-based antibacterial agent:polymer component).