Seal material and metal component with gasket

Abstract

To provide a seal material having good usability.SOLUTION: A seal material 100 includes: a seal body 110 having self-adhesiveness; and an adhesion part 120 which is provided on a surface of the seal body 110 and may deform following deformation when the seal body 110 deforms.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a metal component with a seal and a gasket. [Background technology]

[0002] Patent Document 1 discloses a long sealing body that is freely deformable and has self-adhesive properties. According to Patent Document 1, a gasket of a desired shape can be formed from the long sealing body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2023 / 026752 Summary of the Invention [Problem to be solved by the invention]

[0004] The seal body of Patent Document 1 has room for further improvement in terms of ease of use.

[0005] The present invention has been made in view of the above circumstances, and one exemplary purpose of an embodiment of the present invention is to provide a sealing material that is easy to use. [Means for solving the problem]

[0006] In order to solve the above problems, a sealing material of one embodiment of the present invention comprises a seal body having self-adhesive properties, and an adhesive portion provided on the surface of the seal body, which is capable of deforming in accordance with the deformation of the seal body when the seal body is deformed.

[0007] Another aspect of the invention is a gasketed metal component having a flat sealing surface, the gasket being comprised of one or more of the above-mentioned sealing materials applied to the sealing surface, the sealing materials being held together by a self-adhesive bond. Effect of the Invention

[0008] According to the present invention, a sealing material that is easy to use can be provided. [Brief description of the drawings]

[0009] [Figure 1] 1(a) to (c) are diagrams for explaining the problem related to the embodiment. [Diagram 2] FIG. 2 is a side view of the sealing material according to the embodiment. [Diagram 3] 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 4(a) is a plan view showing the state in which the seal body with the adhesive portion of FIG. 2 and the seal body alone are curved into the same shape and pressed against a metal plate, and FIG. 4(b) is a cross-sectional view along line BB of FIG. 4(a). [Diagram 5] FIG. 5(a) is a plan view of a metal part with a gasket, and FIG. 5(b) is a cross-sectional view taken along line CC in FIG. 5(a). [Figure 6] 3 is a schematic diagram of a hydrogen generation device equipped with a gasket formed from the sealing material of FIG. 2. [Figure 7] 3A to 3C are diagrams illustrating a flow of an example of a method for manufacturing the seal body of FIG. 2. [Figure 8] FIG. 11 is a cross-sectional view of a sealing material according to a modified example. [Figure 9] 9(a) to 9(c) are diagrams showing sealing materials according to modified examples. [Figure 10] 10(a) and (b) are cross-sectional views of a sealing material 100 according to a modified example. [Figure 11] 11(a) and (b) are diagrams showing a sealing material according to a modified example. [Figure 12]12(a) to (c) are diagrams showing a sealing material 100 according to a modified example. [Figure 13] FIG. 11 is a side view of a sealing material according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The present invention will be described below based on preferred embodiments with reference to the drawings. The embodiments are illustrative and do not limit the invention, and all features and combinations described in the embodiments are not necessarily essential to the invention. The same or equivalent components, parts, and processes shown in each drawing are given the same reference numerals, and duplicated descriptions are omitted as appropriate.

[0011] Problems associated with the embodiment will be described. Figures 1(a) to 1(c) are diagrams for explaining problems associated with the embodiment. In Figure 1, a gasket 750 for sealing a gap between a first member to be sealed 10 and a second member to be sealed 12 is formed by a long, flexible and self-adhesive sealing material 700.

[0012] In FIG. 1(a), a sealing material 700 is attached to a first member to be sealed 10. In this example, the sealing material 700 is attached along the outer edge of the first member to be sealed 10. In FIG. 1(b), a seal body 110 is attached along the entire outer edge of the first member to be sealed 10, and both longitudinal ends 700a, 700b are bonded by self-adhesiveness to form a gasket 750. In FIG. 1(c), a second member to be sealed 12 is placed on the first member to be sealed 10, and the gasket 750 is sandwiched between the first member to be sealed 10 and the second member to be sealed 12.

[0013] As shown in Figs. 1(a) and 1(b), the sealing material 700 adheres to the first member 10 to a certain extent due to its adhesiveness (tackiness). However, since the sealing material 700 is bent and attached, if the force with which the sealing material 700 adheres to the first member 10 is weaker than the repulsive force of the sealing material 700, the sealing material 700 may peel off from the first member 10 or the position of the sealing material 700 may shift relative to the first member 10 before the sealing material 700, i.e., the gasket 750, is sandwiched between the first member 10 and the second member 12, i.e., at the stage of Fig. 1(a) or Fig. 1(b). According to the inventors' study, when the member to be sealed is made of metal (e.g., aluminum), the sealing material 700 is likely to peel off or shift in position.

[0014] Fig. 2 is a side view of the sealing material 100 according to the embodiment. Fig. 3 is a cross-sectional view taken along line AA in Fig. 2. The sealing material 100 is used for a gasket, although this is not limited thereto. The sealing material 100 may be used for a large gasket, for example, for a cell seal for water electrolysis or a cell seal for a fuel cell. For example, a long sealing material 100 is attached along the edge of a member to be sealed, and both ends of the sealing material are bonded together by self-adhesive properties to form a ring-shaped (endless) gasket.

[0015] The seal material 100 comprises a long seal body 110, an adhesive portion 120 provided on the surface of the seal body 110, and a separator 130 covering the side of the adhesive portion 120 opposite the seal body 110. The seal material 100 is wound in a roll around a columnar or cylindrical core material 104 with the separator 130 on the outside.

[0016] The seal body 110 is a string-like or band-like member, and has a rectangular cross-sectional shape perpendicular to the longitudinal direction. Note that, as will be described later in a modified example, the shape of the seal body 110 is not limited to this.

[0017] The seal body 110 has high flexibility, in other words, low rigidity. This allows the seal body 110 and therefore the seal material 100 to be freely deformed to fit the edge of the sealed member. For example, the seal body 110 and therefore the seal material 100 can be curved, bent into a substantially L-shape, or bent into a substantially U-shape. Therefore, the seal body 110 only needs to have the flexibility, i.e., rigidity, to realize the required deformation.

[0018] The seal body 110 has required sealing properties, durability, pressure resistance, and heat resistance. As an example, the seal body 110 is made of acrylic rubber as a main material and is molded by press molding or extrusion molding.

[0019] The seal body 110 has self-adhesiveness. "Self-adhesiveness" refers to a property in which, when the seal bodies 110 are brought into contact with each other, for example, when both end faces of a long seal body 110 such as a string-like or band-like seal body 110 are brought into contact with each other, or when the end faces of two seal bodies 110 are brought into contact with each other, at least a part of the contact surface is bonded by a cross-linking reaction. More specifically, "self-adhesiveness" refers to a property in which, when the seal bodies 110 are brought into contact with each other, the cross-linking points contained in the molecular chains of the compounds constituting each contact surface come into contact with the cross-linking agent, and they undergo a cross-linking reaction to bond, that is, the molecular chains of the compounds constituting each contact surface are cross-linked and bonded, thereby bonding at least a part of the contact surface. Therefore, by bringing the seal bodies 110 into contact with each other, the seal bodies 110 can be bonded to each other. For example, by bringing the seal bodies 110 into contact with each other, a part of the contact surface is bonded by a cross-linking reaction, and at least another part of the contact surface is bonded by tackiness. When both longitudinal ends of the seal body 110 are bonded together, the seal body 110 becomes annular (endless).

[0020] The adhesive portion 120 is provided on one surface 110a of the seal body 110. The adhesive portion 120 is provided so as to cover the entire surface 110a of the seal body 110.

[0021] The adhesive portion 120 may be made of an acrylic, rubber, silicone or urethane adhesive. In any case, the adhesive portion 120 has a higher adhesive strength than the seal body 110. The adhesive strength may be an adhesive strength measured by a known measurement method such as a peel test. In this case, "the adhesive portion 120 has a higher adhesive strength than the seal body 110" may mean that the adhesive strength of the adhesive portion 120 measured by a known measurement method such as a peel test is higher than the adhesive strength of the seal body 110 measured by the same measurement method. Alternatively, "the adhesive portion 120 has a higher adhesive strength than the seal body 110" may mean that when a seal body 110 with the adhesive portion 120 and the seal body 110 alone (i.e., the seal body 110 without the adhesive portion 120) of a predetermined length (e.g., 100 mm) are bent into the same shape (e.g., a U-shape as shown in FIG. 4) and pressed against a metal plate (e.g., an aluminum plate) 8, as shown in FIG. 4, the seal body 110 with the adhesive portion 120 remains attached to the metal plate for a longer period of time than the seal body 110 alone.

[0022] The adhesive portion 120 may be formed by applying (i.e., coating) a liquid or semi-liquid adhesive to the seal body 110 and curing it. The adhesive portion 120 may be formed by attaching a double-sided tape. The double-sided tape may be formed by curing a liquid or semi-liquid adhesive. The double-sided tape typically includes a substrate such as a nonwoven fabric, but may not include a substrate.

[0023] The adhesive portion 120 is configured to be deformable in response to the deformation of the seal body 110 when the seal body 110 is deformed. Therefore, the adhesive portion 120 is configured to at least allow the deformation of the seal body 110. The adhesive portion 120 is preferably configured not to hinder the deformation of the seal body 110. In other words, the adhesive portion 120 is preferably configured to have the same or lower rigidity as the seal body 110, that is, to have a rigidity equal to or lower than that of the seal body 110. When the adhesive portion 120 is configured of a double-sided tape including a substrate, it is sufficient that both the substrate and the adhesive of the double-sided tape have a rigidity equal to or lower than that of the seal body 110.

[0024] The adhesive portion 120 is preferably configured to have the same or lower elastic modulus as the seal body 110, i.e., to have an elastic modulus equal to or lower than that of the seal body 110. This is because when it is desired to maintain the seal body 110 in a deformed state, for example a bent state, if the force with which the adhesive portion 120, which has deformed following the seal body 110, tries to return to its original shape is stronger than the force with which the seal body 110 tries to return to its original shape, problems such as the adhesive portion 120 floating up will occur.

[0025] When the adhesive portion 120 is made of a double-sided tape containing a base material, it is preferable that both the base material and the adhesive of the double-sided tape have an elastic modulus equal to or less than that of the seal body 110 .

[0026] The separator 130 is attached to the surface of the adhesive portion 120 opposite to the seal body 110. The separator 130 is peeled off by the user when the seal material 100 is used. The separator 130 protects the adhesive portion 120. The separator 130 also prevents the adhesive portion 120 from sticking unintentionally, making the seal material 100 easier to handle. The separator 130 includes, but is not limited to, a strip-shaped base material (sheet) 132 and a release layer 134 formed on one or both sides of the base material 132. In the example of FIG. 3, the release layer 134 is formed on only one side of the base material 132.

[0027] The substrate 132 may be made of, but is not limited to, polyphenylene sulfide (PPS), polyethylene terephthalate (PET), polyester, polypropylene, aramid, polyolefin, polyimide, nylon, polyvinyl chloride (PCV), polyethylene, or paper.

[0028] The release layer 134 is a layer for realizing easy release from the adhesive portion 120. The release layer 134 is made of, for example, silicone or fluorosilicone, but is not limited thereto.

[0029] When the release layers 134 are formed on both sides of the separator 130, the separator 130 can be attached to the adhesive portion 120 without worrying about the front and back of the separator 130. Therefore, the separator 130 can be easily handled when the seal material 100 is manufactured.

[0030] When the release layer 134 is formed on only one side of the separator 130, the substrate 132 is exposed on the side on which the release layer 134 is not formed, and when the sealing material 100 is wound in a roll, the seal body 110 comes into contact with the substrate 132. In this case, the rolled state of the sealing material 100 is less likely to collapse compared to when the seal body 110 comes into contact with the release layer 134, which has a lower coefficient of friction than the substrate 132, i.e., compared to when the release layer 134 is provided on both sides of the separator 130.

[0031] The basic structure of the sealing material 100 has been described above.

[0032] When attaching the seal material 100, the seal material 100, i.e., the seal body 110 with the adhesive portion 120, is attached, for example, along the outer edge of the member to be sealed while peeling off the separator 130. Both ends of the seal body 110 with the adhesive portion 120 are brought into contact and bonded, and the seal body 110 with the adhesive portion 120 is made into a ring shape. The seal body 110 with the adhesive portion 120 may be cut to an appropriate length before or during attachment to the member to be sealed, as necessary.

[0033] In addition, since the cut end faces of the seal body 110 usually have minute irregularities, there may be some parts that are not in contact microscopically when the end faces of the seal body 110 are simply brought into contact with each other. The parts that are not in contact microscopically do not undergo a cross-linking reaction, and are not bonded. Therefore, when bonding the seal bodies 110 to each other by self-adhesiveness, it is preferable to press the end faces together, that is, to apply force to press the end faces together. This reduces the parts that are not in contact microscopically, and allows for stronger bonding.

[0034] Moreover, a typical adhesive tape has a structure in which a base material, an adhesive portion, and a separator are layered in this order. Similarly, the sealing material 100 has a structure in which a seal body 110 (base material), an adhesive portion 120, and a separator 130 are layered in this order. In other words, the sealing material 100 has the same structure as a typical adhesive tape. Therefore, the sealing material 100 can also be applied using an existing application device used for applying typical adhesive tapes. When applying the sealing material 100 using an application device, the application device positions the sealing material 100, so no groove for positioning is required in the member to be sealed.

[0035] On the other hand, when peeling off and winding up the seal body 110 with the adhesive portion 120 attached to the member to be sealed, the separator 130 is stuck to the adhesive portion 120 and wound up in a roll on the core material 104 with the separator 130 on the outside.

[0036] Next, application examples of the sealing material 100 will be described.

[0037] Fig. 5(a) is a plan view of a metal part (metal plate) 200 with a gasket 150, and Fig. 5(b) is a cross-sectional view taken along line CC in Fig. 5(a). In Fig. 5(a), the seal material 100 is bent along the outer edge of the metal part 200 and attached to the flat seal surface 200a of the metal part 200. The seal material 100 has both longitudinal ends 100a, 100b connected together by self-adhesiveness to form an annular gasket 150. By attaching the seal material 100 using an attachment device, the seal material 100 can be attached to an appropriate position even on a flat seal surface 200a without a groove.

[0038] 6 is a schematic diagram of a hydrogen generation apparatus 300. In this hydrogen generation apparatus 300, two gaskets 150 made of sealing materials 100 are disposed between a hydrogen ion exchange membrane 302 and two separators 304 for water electrolysis. In this case, the sealing materials 100 and, therefore, the gaskets 150 may be attached to the separators 304 for water electrolysis in advance by the adhesive force of the adhesive parts 120 before assembling the hydrogen generation apparatus 300.

[0039] Next, an example of a method for manufacturing the seal body 110 will be described.

[0040] 7 is a diagram showing a schematic flow of an example of a manufacturing method of the seal body 110. This manufacturing method includes a cross-linking agent adding step S1, a kneading step S2, a pressurizing step S3, and a cutting step S4.

[0041] In the cross-linking agent addition process S1, a predetermined amount of cross-linking agent 3 is added to compound 2, which is the main raw material of the seal body 110, and the acrylic rubber 2 and cross-linking agent 3 are mixed uniformly using a well-known mixer or the like (not shown) to form a mixture 4.

[0042] The compound 2, which is the main raw material of the seal body 8, may contain, for example, an acrylic monomer-derived structural unit (acrylic monomer-derived structural unit) derived from an acrylic monomer and a halogen group-containing monomer-derived structural unit (halogen group-containing monomer-derived structural unit) derived from a halogen group-containing monomer, and may be an acrylic rubber or the like that contains these structural units as repeating units. Furthermore, as the acrylic monomer (acrylic monomer-derived structural unit), for example, ethyl acrylate, butyl acrylate, methoxyethyl acrylate, etc. may be used, while as the halogen group-containing monomer (halogen group-containing monomer-derived structural unit), for example, 2-chloroethyl vinyl monomer such as 2-chloroethyl vinyl ether may be used. Note that, as the halogen group in the halogen group-containing monomer, in addition to the above-mentioned chlorine group, a fluorine group, a butyl group, an iodine group, etc. may be used.

[0043] For example, an imidazole compound such as 1-butylimidazole can be added and used as the crosslinking agent 3. That is, any crosslinking agent 3 can be added to and uniformly mixed with a compound 2 such as an acrylic rubber and can cause a crosslinking reaction between the compound 2 and the crosslinking agent 3.

[0044] The amount of the crosslinking agent 3 added to the compound 2 can be specified based on the following: That is, the molar equivalent of the crosslinking agent 3 relative to the halogen group of the halogen-containing monomer contained in the acrylic rubber 2 can be in the range of 0.2 to 4.0.

[0045] When the range of molar equivalents is converted into mol%, the amount of the crosslinking agent 3 added can be in the range of 0.8 mol% to 4.2 mol% relative to the amount of the acrylic rubber 2 added. By adding the crosslinking agent 3 in the molar equivalents (or mol%) specified as above, the compound 2 can promote a good crosslinking reaction.

[0046] In the kneading step S2, the mixture 4 is further kneaded. The kneading step S2 can be performed using a known kneader, and is not particularly limited, and is a step of kneading the mixture 4 and adjusting it to a predetermined viscosity.

[0047] For example, a mill mixer (not shown) can be used that uses a rotor blade connected to a drive motor and mixes the mixture 4 by rotating the rotor blade, or a roll mixer (not shown) can be used that kneads the mixture 4 between multiple rolls.

[0048] The kneading step S2 can be carried out in two steps using the mill mixer and roll mixer described above as mixers. To be more specific, the mixture 4 obtained in the crosslinking agent addition step S1 is kneaded in the first step using a mill mixer as a mixer in the mill kneading step S2a, and the mill-kneaded product 5a obtained in the mill kneading step S2a is kneaded in the second step using a roll mixer as a mixer in the roll kneading step S2b. The kneading step S2 is not limited to the above, and only one of the mill kneading step S2a and the roll kneading step S2b may be carried out, or the roll kneading step S2b may be carried out before the mill kneading step S2a.

[0049] The kneading conditions for mixture 4 are not particularly limited, and for example, the rotor blade rotation speed of the mill kneader performing the mill kneading step S2a can be in the range of 5 rpm to 20 rpm, the kneading temperature can be in the range of 30°C to 70°C, and the kneading time can be in the range of 30 minutes to 60 minutes, and the roll kneader performing the roll kneading step S2b can be in the range of 7 rpm to 20 rpm, the kneading temperature can be in the range of 30°C to 80°C, and the kneading time can be in the range of 10 minutes to 30 minutes.

[0050] By carrying out kneading in the kneading process S2 (mill kneading process S2a, roll kneading process S2b), the mixture 4 sent to the kneading process S2 is adjusted to a substance having properties with appropriate viscosity and fluidity for carrying out the next process.

[0051] In the pressurizing step S3, the kneaded material 5 obtained in the kneading step S2 is pressed using a press.

[0052] The pressurizing step S3 can be carried out using a known press machine, and by applying pressure while heating at a predetermined pressure, the kneaded material 5 discharged from the kneading step S2, for example, in the form of a lump can be thinly stretched to a predetermined thickness (for example, 2 mm) to form a thin plate-like pressurized body 6.

[0053] The pressing conditions of the press machine in the pressing step S3 are not particularly limited, but for example, the pressing pressure is 95 to 105 kgf / cm 2 By pressing in a known press mold at a pressing temperature of 150°C and a pressing time of 1 hour, it is possible to form a pressed body 6 whose thickness t after pressing is adjusted to 2 mm.

[0054] In the cutting step S4, the thin plate-like pressurized body 6 pressed to a uniform thickness in the pressing step S3 is further cut into a strip-like body 7. The cutting step S4 is not particularly limited as long as it can cut the thin plate-like pressurized body 6 into a strip-like body 7 (in other words, an elongated shape) of a predetermined width, and may be, for example, cut using a known cutting means (cutter) or the like, or may be formed by punching using a die that matches the shape of the strip-like body 7. This allows the final strip-like body 7 (strip-like seal body 110) to be formed into an elongated (or strip-like) body of a predetermined width having a longitudinal direction and a lateral direction.

[0055] Next, the effects of the embodiment will be described. According to the embodiment, since the sealant 100 includes the adhesive portion 120, peeling or misalignment of the sealant 100 due to insufficient adhesive strength is suppressed, and the positioning accuracy of the sealant 100 can be improved, the productivity can be improved, and the sealability can be improved.

[0056] In this embodiment, the sealing material 100 is attached to the member to be sealed by the adhesive force of the adhesive portion 20. This prevents the sealing material 100 from shifting position even when the sealing material 100 is changed to a complex shape. In other words, the sealing material 100 of this embodiment can be used without being restricted by the shape of the member to be sealed.

[0057] Conventionally, a dedicated mold was required to mold a gasket, and a large mold was required to mold a large gasket. A large mold is costly to manufacture and cumbersome to manage. In contrast, according to the present embodiment, a desired gasket can be formed from a long sealing material 100 such as a string or strip, and therefore a dedicated mold as for conventional gaskets is not required. In other words, a large mold for a large gasket is also not required. Therefore, it is particularly advantageous to apply the sealing material 100 of the present embodiment to a large gasket.

[0058] When a gasket is made by punching out a sheet material, punching waste, that is, waste that is not used as a gasket and is discarded, is generated. When a large gasket is made by punching out a sheet material, naturally, large punching waste, that is, a large amount of waste, is generated. In contrast, according to this embodiment, a gasket can be made from a long sealing material such as a string or band, so punching waste is not generated. Therefore, according to this embodiment, materials can be used more efficiently.

[0059] In this embodiment, the adhesive portion 120 has a rigidity equal to or less than that of the seal body 110, and therefore does not impede the deformation of the seal body 110 but deforms in accordance with the deformation of the seal body 110. This prevents the sealing performance of the seal body 110 from being impaired.

[0060] When a seal material is wound into a roll, even if the seal material does not have an adhesive portion, the self-adhesive seal bodies will adhere to each other when they come into contact with each other, so a separator is necessary between them. However, the adhesive force of the seal body to the separator is weak, so the seal material is likely to collapse when handled. In contrast, in this embodiment, the adhesive portion 120 has a certain adhesive force to the separator 130 compared to the seal body 110, so deformation during handling is suppressed and handling is made easier.

[0061] According to this embodiment, an existing pasting device for pasting a general adhesive tape can be used to paste the sealant 100. Therefore, there is no need to develop a new pasting device, and costs can be reduced. In addition, by pasting the sealant 100 using a pasting device, in other words, by automatically pasting the sealant 100, the positioning accuracy of the sealant 100 is improved, and as a result, the assembly accuracy is also improved. Since the pasting device positions the sealant 100, it is not necessary to provide a groove for positioning in the member to be sealed, and the manufacturing cost of the member to be sealed is reduced. In addition, by pasting the sealant 100 using a pasting device, the sealant 100 can be pasted at a higher speed, and productivity is improved.

[0062] The present invention has been described above based on an embodiment. This embodiment is merely an example, and it will be understood by those skilled in the art that various modifications are possible in the combination of each component and each processing step, and that such modifications are also within the scope of the present invention. Such modifications will be described below.

[0063] (Variation 1) Although not specifically mentioned in the embodiment, the adhesive strength of the adhesive portion 120 may be weaker on the opposite side, that is, on the surface 120b attached to the separator 130 (i.e., attached to the member to be sealed), than on the surface 120a attached to the seal body 110.

[0064] The above-mentioned adhesive strength relationship may be achieved by forming adhesive portion 120 so that the adhesive strength gradually weakens from surface 120a to surface 120b.

[0065] Fig. 8 is a cross-sectional view of a seal material 100 according to a modified example. Fig. 8 corresponds to Fig. 3. The above-mentioned adhesive force relationship may be realized by forming the adhesive portion 120 into a two-layer structure of a first adhesive portion 121 and a second adhesive portion 122, as shown in Fig. 8. In detail, the adhesive portion 120 may be realized by forming the adhesive portion 120 from a first adhesive portion 121 that contacts the seal body 110, and a second adhesive portion 122 that has weaker adhesion than the first adhesive portion 121 and overlaps the first adhesive portion 121 on the side opposite to the seal body 110.

[0066] According to this modification, the adhesive portion 120 is difficult to peel off from the seal body 110, but is easy to peel off from the member to be sealed. Therefore, when the position of the seal material 100 relative to the member to be sealed shifts, that is, when the seal material 100 is applied incorrectly, the seal material 100 can be easily reapplied.

[0067] (Variation 2) Unlike the embodiment and the above-mentioned modified examples, the adhesive portion 120 may be provided so as to partially cover the surface 110a of the seal body 110. Figs. 9(a) to (c) are diagrams showing a sealing material 100 according to a modified example. Figs. 9(a) to (c) show the sealing material 100 in an unfolded state, not in a roll shape. Figs. 9(a) to (c) omit the illustration of the separator 130.

[0068] In FIG. 9(a), a plurality of adhesive portions 120 extending in a direction perpendicular to the longitudinal direction of the seal body 110 (hereinafter referred to as the width direction) are arranged at intervals in the longitudinal direction of the seal body 110.

[0069] In FIG. 9(b), a plurality of adhesive portions 120 extending in a direction intersecting the longitudinal direction and width direction of the seal body 110 are arranged at intervals in the longitudinal direction of the seal body 110. In FIG.

[0070] 9(c), a plurality of dot-like adhesive portions 120 are distributed on the surface 110a of the seal body 110. The distribution of the adhesive portions 120 is not particularly limited, and may be uniform, or may have dense and sparse portions of the adhesive portions 120 repeated in the longitudinal direction.

[0071] According to this modified example, the surface area of ​​the adhesive portion 120 is smaller than when the adhesive portion 120 is provided so as to cover the entire surface 110a of the seal body 110, and therefore the area of ​​contact between the adhesive portion 120 and the member to be sealed is also small. Therefore, when the sealing material 100 is attached to the member to be sealed, the sealing material 100 is easily peeled off from the member to be sealed, and therefore the sealing material 100 can be easily re-applied if, for example, a mistake is made in application.

[0072] (Variation 2) Unlike the embodiment and the above-mentioned modified example, the adhesive portion 120 may be provided so as to cover only a part of the range in the width direction of the surface 110a of the seal body 110. For example, the adhesive portion 120 may be provided so as to cover only the central range in the width direction, only the ranges at both ends, or only the range on one side (one side). According to this modified example, compared to the case where the adhesive portion 120 is provided so as to cover the entire surface 110a of the seal body 110, the surface area of ​​the adhesive portion 120 is small, and therefore the area of ​​contact between the adhesive portion 120 and the member to be sealed is also small, so that when the seal material 100 is attached to the member to be sealed, the seal material 100 is easily peeled off from the member to be sealed, and therefore, when the seal material 100 is attached incorrectly, it is easy to reattach the seal material 100. In addition, in the range in the width direction where the adhesive portion 120 is not provided, the surface 110a of the seal body 110 directly contacts the member to be sealed, so that a higher sealability can be achieved. A specific example will be described below.

[0073] 10(a) and (b) are cross-sectional views of a seal material 100 according to a modified example. FIG. 10(a) shows the state before the seal material 100 is attached to the member to be sealed 14, and FIG. 10(b) shows the state after the seal material 100 is attached to the member to be sealed 14. In the seal material 100 of this modified example, the adhesive portion 120 is provided so as to cover only the central range in the width direction of the surface 110a of the seal body 110. In other words, the adhesive portion 120 is provided in a range that avoids both ends in the width direction of the surface 110a of the seal body 110. The separator 130 is formed so that the portion corresponding to the adhesive portion 120 is thinner than the other portions so that the combined thickness of the adhesive portion 120 and the separator 130 is uniform in the width direction.

[0074] According to this modification, the surface area of ​​the adhesive portion 120 is relatively small, and therefore the area of ​​contact between the adhesive portion 120 and the member 14 to be sealed is also relatively small, making it easy to re-apply the sealant 100 if it is applied incorrectly. Also, since the ranges at both ends in the width direction of the surface 110a of the seal body 110 directly contact the member to be sealed, a higher sealability can be achieved. In addition, according to this modification, the adhesive portion 120, which may not have resistance (e.g., chemical resistance) to the object to be sealed, can be prevented from coming into contact with the object to be sealed.

[0075] 11(a) and (b) are cross-sectional views of a seal material 100 according to a modified example. FIG. 11(a) shows a state before the seal material 100 is attached to the member to be sealed 14, and FIG. 11(b) shows a state after the seal material 100 is attached to the member to be sealed 14. In the seal material 100 of this modified example, the adhesive portion 120 is provided so as to cover only one side (one side) in the width direction of the surface 110a of the seal body 110. In FIG. 11(a) and (b), the range R1 covered by the adhesive portion 120 is narrower than the range R2 not covered by the adhesive portion 120 in the width direction, but this is not limited thereto, and the range R1 may be wider than the range R2, or the two ranges R1 and R2 may be the same. The separator 130 is formed so that the portion corresponding to the adhesive portion 120 is thinner than the other portions so that the combined thickness of the adhesive portion 120 and the separator 130 is uniform in the width direction.

[0076] According to this modification, the surface area of ​​the adhesive portion 120 is relatively small, and therefore the area of ​​contact between the adhesive portion 120 and the member to be sealed 14 is also relatively small, so that the seal material 100 can be easily re-applied if it is applied incorrectly. Also, the other side in the width direction of the surface 110a of the seal body 110 directly contacts the member to be sealed, so that a higher sealing performance can be achieved. Also, by applying the range R2 side not covered by the adhesive portion 120 to the member to be sealed 14 so as to be positioned on the inner periphery side of the gasket, the adhesive portion 120, which may not have resistance (e.g., chemical resistance) to the object to be sealed, can be prevented from coming into contact with the object to be sealed.

[0077] (Variation 3) Although not specifically mentioned in the embodiment and the above-mentioned modified example, each of the multiple adhesive parts 120 may be formed in a convex shape tapered in the thickness direction (i.e., becoming thinner as it moves away from the surface 110a of the seal body 110), or one or more adhesive parts 120 may each have multiple convex parts tapered in the thickness direction. An example will be specifically described below.

[0078] 12(a) to (c) are diagrams showing a sealing material 100 according to a modified example. FIG. 12(a) is a side view of the sealing material 100 in an unfolded state. FIGS. 12(b) and (c) are cross-sectional views taken along the line DD in FIG. 12(a). FIGS. 12(a) and (b) show the state before the sealing material 100 is attached to the member to be sealed 14. FIGS. 12(a) and (b) can also be said to show the state in which the sealing material 100 is lightly pressed against (in contact with) the member to be sealed 14. FIG. 12(c) shows the state in which the sealing material 100 is attached to the member to be sealed 14, particularly the state in which the sealing material 100 is strongly pressed against the member to be sealed 14.

[0079] The sealant 100 of this modification includes a plurality of adhesive portions 120. Each of the plurality of adhesive portions 120 is formed in a tapered convex shape in the thickness direction before being strongly pressed against the member to be sealed 14. The shape of the adhesive portion 120 is not limited, and may be a hemisphere as shown in Figs. 12(a) and 12(b), a truncated cone, a cone, or other shape. The adhesive portion 120 may be elongated in the paper direction in Fig. 12(a). In Fig. 12(c), the sealant 100 is strongly pressed against the member to be sealed 14, and as a result, the plurality of adhesive portions 120 are flattened.

[0080] According to this modification, since the adhesive portion 120 is tapered in the thickness direction, when the sealant 100 is lightly pressed against the member to be sealed 14, only the tip of the convex adhesive portion 120 comes into contact with the member to be sealed 14, and the contact area between the adhesive portion 120 and the member to be sealed 14 is relatively small. Therefore, when the sealant 100 is lightly pressed against the member to be sealed 14 for positioning, it is easy to re-apply the sealant 100 even if it is applied incorrectly. On the other hand, when the sealant 100 is strongly pressed against the member to be sealed 14, the adhesive portion 120 is crushed and the contact area between the adhesive portion 120 and the member to be sealed 14 becomes relatively large, so that the sealant 100 is firmly attached to the member to be sealed 14.

[0081] (Variation 4) Fig. 13 is a side view of a seal material 100 according to a modified example. Fig. 13 corresponds to Fig. 2. Unlike the embodiment and the modified examples described above, this modified example has adhesive parts 120 provided on both sides 110a, 110b of a seal body 110. In this case, the seal material 100 is less likely to lose its shape when wound in a roll.

[0082] (Variation 5) In the embodiment and the above-mentioned modified example, the sealing material 100 is wound in a roll around the columnar or cylindrical core material 104, but this is not limited thereto. The sealing material 100 may be wound around a thin plate. The sealing material 100 may not be wound, and may be stored in a storage bag or box without being wound, for example. Alternatively, the sealing material 100 may be attached to a sheet-like or plate-like separator. For example, a plurality of sealing materials 100 may be arranged in parallel on one sheet-like or plate-like separator.

[0083] (Variation 6) In the embodiment and the above-mentioned modified example, the cross-sectional shape of the seal body 110 perpendicular to the longitudinal direction is rectangular, but the shape of the seal body 110 is not limited to this. For example, the surface 110a of the seal body 110 on which the adhesive portion 120 is provided may be flat, and the opposite surface may be a curved surface that is convex on the opposite side to the flat surface. Note that the surface 110a of the seal body 110 on which the adhesive portion 120 is provided may be a curved surface.

[0084] (Variation 7) In the embodiment and the above-mentioned modified example, the sealing material 100 is in a string-like or strip-like shape, but is not limited thereto. The sealing material 100 may be formed, for example, in a rectangular shape in a plan view. In this case, the sealing material may be cut by a user into a desired shape, for example, into a string-like or strip-like shape, before use.

[0085] Any combination of the above-mentioned embodiments and modifications is also useful as an embodiment of the present invention. A new embodiment resulting from the combination has the effects of the combined embodiments and modifications. It will also be understood by those skilled in the art that the functions to be performed by each component recited in the claims can be realized by each component shown in the embodiments and modifications alone or in cooperation with each other.

[0086] The above-described embodiment and modifications can be generalized to obtain the following aspects.

[0087] [Aspect 1] A seal body having self-adhesive properties; An adhesive portion provided on a surface of the seal body, the adhesive portion being capable of deforming in accordance with the deformation of the seal body when the seal body is deformed; A sealing material comprising:

[0088] [Aspect 2] 2. The sealing material according to claim 1, wherein the adhesive portion has a rigidity equal to or less than that of the seal body.

[0089] [Aspect 3] 3. The sealing material according to claim 1 or 2, wherein the adhesive portion has an elastic modulus equal to or lower than that of the seal body.

[0090] Aspect 4 4. The sealing material of any one of embodiments 1 to 3, further comprising a separator covering the adhesive portion on an opposite side to the seal body.

[0091] Aspect 5 5. The sealing material according to claim 4, wherein the seal body is wound together with the adhesive portion and the separator into a roll.

[0092] Aspect 6 2. The sealing material according to claim 1, wherein the adhesive portion has a weaker adhesive strength on a surface opposite to the surface attached to the seal body.

[0093] Aspect 7 2. The sealing material according to embodiment 1, comprising a plurality of the adhesive portions, the plurality of adhesive portions being formed in a tapered convex shape in a thickness direction of the seal body.

[0094] Aspect 8 A metal part with a gasket, the metal component has a flat sealing surface; The gasket is made of one or more sealing materials according to any one of claims 1 to 4 attached to the sealing surface, the sealing materials being joined together by self-adhesive properties. Metal parts with gaskets. [Explanation of symbols]

[0095] 100 sealing material, 110 seal body, 120 adhesive portion, 130 separator.

Claims

1. A seal body having self-adhesive properties; An adhesive portion provided on a surface of the seal body, the adhesive portion being capable of deforming in accordance with the deformation of the seal body when the seal body is deformed; A sealing material comprising:

2. The sealing material according to claim 1 , wherein the adhesive portion has a rigidity equal to or less than that of the seal body.

3. The sealing material according to claim 1 , wherein the adhesive portion has an elastic modulus equal to or less than that of the seal body.

4. The sealing material according to claim 1 , further comprising a separator covering the adhesive portion on an opposite side to the seal body.

5. The sealing material according to claim 4 , wherein the seal body is wound together with the adhesive portion and the separator into a roll.

6. The sealing material according to claim 1 , wherein the adhesive portion has a surface attached to the seal body and a surface opposite the surface has a weaker adhesive strength than the surface attached to the seal body.

7. The sealing material according to claim 1 , comprising a plurality of the adhesive portions, the plurality of adhesive portions being formed in a tapered convex shape in a thickness direction of the seal body.

8. A metal part with a gasket, the metal component has a flat sealing surface; The gasket is comprised of one or more seals according to any one of claims 1 to 7 attached to the sealing surface, the seals being held together by self-adhesive properties. Metal parts with gaskets.

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