JP5939689B2 - Liquid-resistant sheet - Google Patents

Description

  The present invention relates to a liquid-resistant sheet that prevents liquid from penetrating into an adhesive layer with a protective adhesive layer.

  Conventionally, sheets as display information media have been printed and pasted on the surface with information such as characters and barcodes in a wide range of industrial fields such as home use, office use, commercial use, process management, and logistics management. It is used. These sheets rarely come into contact with liquids when attached to stationery, containers, etc., but when used on chemical containers, medical inspection instruments, or laboratory instruments, the sheets are used as chemicals, etc. It is desirable that the sheet be a liquid-resistant sheet that does not peel off from the adherend even when it is exposed to. As such a liquid-resistant sheet, for example, as a label attached to a container or the like, a barrier layer is provided on a heat-sensitive layer formed on a substrate having an adhesive layer at the bottom, and an adhesive is provided on the barrier layer. There is an adhesive label having a configuration in which a synthetic resin film is laminated via a layer (see Patent Document 1).

JP 2009-255469 A

  However, in Patent Document 1, although there is some liquid resistance, the number of times that the label attached to the container comes into contact with the liquid increases due to liquid leakage when transferring the chemical from the chemical container In addition, there is a problem that the function of the adhesive layer is gradually lost due to the contact between the chemical and the adhesive surface on the outer periphery of the label, and the label is peeled off from the adherend. In addition, when it is necessary to immerse a labeled inspection or labware in a liquid, the adhesive layer on the periphery of the label comes into contact with the liquid and the function of the adhesive layer is lost, and the label peels off immediately from the object to be adhered. There was a problem of falling.

  The present invention has been made paying attention to such problems, and an object of the present invention is to provide a liquid-resistant sheet that does not easily peel off from an adherend even when exposed to chemicals or the like.

In order to solve the above problems, the liquid-resistant sheet of the present invention is
It is a sheet that is provided with an adhesive layer on at least one surface of the front and back of the sheet body, and is attached to an adherend through the adhesive layer, and is a gel that surrounds the adhesive layer around the adhesive layer A protective adhesive layer made of a member is provided.
According to this feature, even if the liquid that hinders the function of the adhesive layer that fixes the sheet body to the adherend reaches the outer periphery of the sheet, the protective adhesive layer is applied to the adhesive layer of the liquid. It is designed to prevent and protect the reach. In particular, the protective adhesive layer is composed of a gel-like member and deforms so as to conform to the uneven surface of the surface of the sheet main body and the adherend, so that the liquid is applied to the adhesive layer unless the protective adhesive layer is fundamentally destroyed. Is difficult to reach, and the function of the adhesive layer can be maintained for a long time.

An air layer is formed between the protective adhesive layer and the adhesive layer.
According to this feature, even if the liquid enters from the surface of the sheet main body and the adherend, a large amount of liquid adheres due to the labyrinth effect by the air layer between the protective adhesive layer and the adhesive layer. The function of the adhesive layer can be maintained for a long time without reaching the layer.

An inner sheet having the adhesive layer and an outer sheet having the protective adhesive layer are connected to each other, and the outer sheet covers the inner sheet from the outside, and surrounds the outer peripheral portion of the inner sheet with the protective adhesive layer. It is characterized by that.
According to this feature, since the inner sheet is formed between the adhesive layer and the protective adhesive layer, the strength of the sheet can be increased, the smoothness of the sheet can be increased, and the printability can be improved.

These are perspective views which show the external appearance of the state which stuck the liquid-resistant sheet | seat of 1st Embodiment of this invention to the beaker which is a glass container. (A) is an exploded perspective view showing the liquid-resistant sheet of the first embodiment, and (b) is a laminated configuration in a state where the liquid-resistant sheet of the first embodiment is adhered to an adherend. FIG. These are sectional drawings which show the state which exposed the liquid-resistant sheet | seat of 1st Embodiment of the state affixed on the to-be-adhered body to the liquid. These are expanded sectional views which show the shape change of a protective adhesive layer when a part of protective adhesive layer is damaged with the liquid. These are expanded sectional views which show the shape change of a sheet | seat body when a part of protective adhesion layer is damaged with the liquid. (A) is an exploded perspective view showing a liquid-resistant sheet according to the second embodiment, and (b) is a laminated configuration in a state where the liquid-resistant sheet according to the second embodiment is adhered to an adherend. FIG. These are sectional drawings which show the state which exposed the liquid-resistant sheet | seat of 2nd Embodiment of the state affixed on the to-be-adhered body to the liquid. (A) is an exploded perspective view of a liquid-resistant sheet having the release sheet of the third embodiment, and (b) is a cross-sectional view showing a laminated configuration of the liquid-resistant sheet of the third embodiment. These are sectional drawings which show a laminated structure when the liquid-resistant sheet of 3rd Embodiment is affixed on a to-be-adhered body. These are sectional drawings which show the laminated structure of the conventional sheet | seat compared with this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the liquid resistant sheet according to the first embodiment of the present invention will be described.

  The liquid-resistant sheet 1 according to the first embodiment of the present invention is attached to the surface of a beaker 3 that is a glass container, for example, as shown in FIG. 1, in order to identify the liquid 2 placed in the beaker 3. Management information is displayed. In addition, the liquid-resistant sheet 1 is used for clearly indicating management information such as a product name, a brand name of the product, a print for identifying an object to be pasted, and a barcode. In the description after FIG. 2, an example in which the liquid-resistant sheet 1 is applied to the planar adherend 4 instead of the surface of the beaker 3 is described.

  As shown in FIGS. 2A and 2B, the liquid-resistant sheet 1 of the present embodiment has a pressure-sensitive adhesive layer 5 having adhesive strength on both sides at the center on the adherend side of the sheet body 6. A gel-like protective adhesive layer 7 is formed so as to surround the adhesive layer 5. The gel-like protective pressure-sensitive adhesive layer 7 does not need to be in the form of a gel from the beginning, but here it is in the form of a gel and is attached to the sheet body 6 by using the adhesive force of the gel. .

  In the liquid-resistant sheet 1 having such a laminated structure, as shown in the enlarged view of FIG. 3, the liquid-resistant sheet 1 has an adhesive layer 5 and a gel with respect to an adherend 4 such as glass. The protective adhesive layer 7 is stuck and used. When working with chemicals, etc., the number of times the label affixed to the adherend, such as a container, will come into contact with the liquid due to liquid leakage when the chemical is transferred from the chemical container. When it is necessary to immerse a given inspection instrument or laboratory instrument itself in the liquid, the contact between the liquid and the label occurs frequently.

  In the embodiment of the present invention, as shown in the enlarged view of FIG. 3, the protective adhesive layer 7 is composed of a gel-like member, and the liquid-resistant sheet 1 is made of glass or the like depending on the properties of the gel-like member. When pressed against the adherend 4, the sheet 6 deforms so as to adapt to minute irregularities that cannot be confirmed with the naked eye on the surface 6 a of the sheet body 6 and the surface 4 a of the adherend 4. In particular, according to experiments, as shown in FIG. 4, even if a part of the gel-like member constituting the protective adhesive layer is damaged by the liquid 2 such as a chemical, the shape changes so as to refill the damaged part. Has been confirmed. Due to the properties of such a gel-like member, the liquid 2 such as a chemical is difficult to reach the adhesive layer 5 disposed inside unless the protective adhesive layer 7 is fundamentally destroyed. Even when the film is immersed in the liquid 2, the function of the adhesive layer 5 can be maintained for a long time. In this embodiment, the protective adhesive layer 7 uses a single solid gel-like member, but it may be a laminated body of gel-like sheets having a predetermined thickness, or when a chemical solution or the like is touched. You may employ | adopt the gel-like member which gelatinizes.

  In addition, when the liquid-resistant sheet 1 is exposed to the liquid 2 and the gel-like protective adhesive layer is gradually damaged, depending on the thickness and specific gravity of the sheet body 6 and the specific gravity and viscosity of the exposed liquid 2. When at least the specific gravity of the sheet main body 6 is greater than the specific gravity of the liquid 2 to be exposed, as shown in FIG. 5, the sheet main body 6 is gradually lowered by gravity as the gel-like member is damaged by the liquid 2 such as a medicine. It will hang down. For this reason, it is possible to add a function of preventing the penetration of the liquid 2 at the peripheral edge of the sheet body 6, and the liquid 2 is more difficult to reach the adhesive layer 5 disposed inside.

  Regarding the material for each component of the liquid-resistant sheet 1, the sheet body 6 is a layer serving as a base material for ensuring the strength as a sheet, and specifically, a polyethylene terephthalate system, a polyethylene system Synthetic resin films such as polypropylene, polyvinyl chloride, polyethylene naphthalate, acrylic, and fluorine are used.

  In the present embodiment, the thickness of the sheet main body 6 is not particularly limited, but is designed so as to be stable in printing and a lamination process with other layers and not to be broken or deformed.

  In addition, when printing information such as a product name, in addition to printing the upper surface of the sheet body 6 as a printing layer, a thermal layer is provided on the upper surface side of the sheet body 6 to enable printing by a thermal reaction, Information such as a product name may be printed by using the thermal layer as a printing layer.

  Although the kind of adhesive used for the said adhesion layer 5 is not specifically limited, For example, 1 type selected from acrylic type, polyester type, urethane type, polyether type, rubber type, silicone type, polyamide type, fluorine type, etc. Alternatively, a material composed of two or more pressure-sensitive adhesives and having a relatively high chemical resistance is selected.

  Although it does not specifically limit as a kind of the said gel-like protective adhesion layer 7, For example, a base material less adhesive is mentioned. Moreover, when implementing the liquid-resistant sheet | seat 1 of this invention, not only the protective adhesive layer which has a gel-like aspect from the beginning, but the adhesive which swells and gelatinizes by reacting with a liquid may be sufficient. Such an adhesive is not particularly limited, and examples thereof include an adhesive such as an acrylic resin, a urethane resin, a polystyrene resin, a polyester resin, and a polyamide resin.

  Although it does not specifically limit as said liquid 2, For example, it mentioned above with respect to aliphatic hydrocarbons, such as hexane, aromatic hydrocarbons, such as toluene, alcohol, primary amine, acetone, ether, etc. The liquid resistant sheet 1 was effective.

  The kind of the adherend 4 is not limited to glassy substances such as beakers, flasks, and slide glasses of laboratory instruments, but is pottery, bottles made of earthenware and glass, and crushed like glass. Is mentioned.

  In addition, the said liquid-resistant sheet | seat 1 is good to laminate | stack the paper and film which can be peeled on the back surface of the adhesion layer 5 as a mount. By laminating such a mount, it becomes easy to handle without contacting the adhesive layer during distribution, and when used as a liquid-resistant sheet, the sheet can be easily peeled off from the mount.

  Next, the liquid resistant sheet 21 according to the second embodiment of the present invention will be described. As shown in FIGS. 6A and 6B, the liquid-resistant sheet 21 of the second embodiment has an adhesive layer 5 having adhesive strength on both sides in the center on the adherend side of the sheet body 6. Is the same as the liquid-resistant sheet 1 of the first embodiment in that a gel-like protective adhesive layer 7 is formed so as to surround the adhesive layer 5. Since the content of the structure of the said adhesion layer 5, the sheet | seat main body 6, and the gel-like protective adhesion layer 7 is the same as that of the liquid-resistant sheet 1 of the said 1st Embodiment, it attaches | subjects the same number and demonstrates. Is omitted.

  In the liquid-resistant sheet 21 of the second embodiment, when the liquid-resistant sheet 21 is pressed against the adherend 4 such as glass, the protective adhesive layer 7 and the adhesive layer 5 are separated by a predetermined distance. It differs from the liquid resistant sheet 1 of the first embodiment in that an air layer 8 is formed between the protective adhesive layer 7 and the adhesive layer 5. As shown in the enlarged view of FIG. 7, due to the nature of the gel-like member, a liquid such as a chemical is difficult to reach the adhesive layer 5 disposed inside unless the protective adhesive layer 7 is fundamentally destroyed. Even when the liquid-resistant sheet 21 is immersed in the liquid 2, the function of the adhesive layer 5 can be maintained for a long time. For example, the surface 6a of the sheet main body and the surface 4a of the adherend are adhered over time. Even if a part of the liquid enters from the air, the sealed air layer 8 exists between the protective adhesive layer 7 and the adhesive layer 5, so that a large amount of liquid 2 can be obtained due to the labyrinth effect of the air layer 8. However, it becomes difficult to reach the outer edge 5a of the adhesive layer, and the adhesive function of the adhesive layer 5 can be maintained for a long time.

  In addition, as described above, when the protective adhesive layer 7 is not a protective adhesive layer having a gel-like form from the beginning, but is an adhesive that swells by reacting with a liquid to become a gel, the expanded gel is applied. The gaps are closed by closely entering minute irregularities that cannot be confirmed with the naked eye on the surface 4a of the body 4 and the surface 6a of the sheet body 6.

  Further, in the case of the pressure-sensitive adhesive that swells into a gel by reacting with the liquid 2, the protective adhesive layer outer edge portion 7a further swells due to the surface tension of the expanded gel, and the protective pressure-sensitive adhesive layer 7 Even when the amount that can be held increases and the sheet is exposed to the liquid 2, the time for the protective adhesive layer 7 to become a wall becomes long, the liquid 2 does not reach the adhesive layer 5, and the adhesive of the adhesive layer 5 over a long period of time. The function can be maintained.

  The position of the air layer 8 and its width may be any position as long as the adhesive function of the protective adhesive layer 7 and the adhesive layer 5 is exhibited, and the width is not particularly limited. The width of the sheet is appropriately determined depending on the thickness, material, specific gravity, specific gravity of the exposed liquid, viscosity, and the like.

  Next, the liquid resistant sheet 31 according to the third embodiment of the present invention will be described. As shown in FIGS. 8A and 8B, the liquid-resistant sheet 31 according to the third embodiment includes an adhesive layer 5, an inner sheet 9, a gel-like protective adhesive layer 7, The outer sheets 10 are sequentially laminated, and the inner sheet 9 having the adhesive layer 5 is connected so that the outer sheet 10 having the gel-like protective adhesive layer 7 covers from the outside. The configurations of the inner sheet 9 and the outer sheet 10 are selected from the materials shown in the configuration of the seat body 6 of the first embodiment, and the materials constituting the inner sheet 9 and the outer sheet 10 are different. , The same thing may be sufficient. Since the content of the structure about the adhesion layer 5 and the gel-like protective adhesion layer 7 is also the same as the content of the structure of the said 1st Embodiment, it attaches | subjects the same number and abbreviate | omits description.

  Since the inner sheet 9 is formed between the pressure-sensitive adhesive layer 5 and the protective pressure-sensitive adhesive layer 7, the liquid-resistant sheet 31 of this embodiment can increase the strength of the sheet and increase the smoothness of the sheet. Suitability can be improved. Specifically, by imparting strength to the sheet, when the liquid adheres to the liquid-resistant sheet 31, the strength of the entire sheet decreases, and as a result, the liquid-resistant sheet 31 breaks due to stimulation such as surface friction. As a result, the unevenness of the entire sheet resulting from uneven coating of the gel-like protective adhesive layer 7 and the adhesive layer 5 can be reduced and smoothed, resulting in improved printability.

  Next, the state which affixed the liquid-proof sheet 31 of the 3rd Embodiment of this invention on the to-be-adhered body 4 is shown in FIG. The air layer 8 is naturally formed between the protective adhesive layer 7 and the adhesive layer 5 by adhering the liquid-resistant sheet 31 to the adherend 4. Therefore, even if the liquid 2 invades from the outer sheet 10 and the surface 4a of the adherend, a large amount of liquid is generated by the labyrinth effect by the air layer 8 between the protective adhesive layer 7 and the adhesive layer 5. Thus, the adhesive function of the adhesive layer 5 can be maintained for a long time.

  Further, as shown in the enlarged view of FIG. 3 in the first embodiment, the protective adhesive layer 7 is made of a gel-like member, and the liquid-resistant sheet 31 is made of glass or the like depending on the property of the gel-like member. When pressed against the adherend 4, the surface of the outer sheet 10 and the surface 4 a of the adherend 4 are deformed so as to become familiar with minute irregularities that cannot be confirmed with the naked eye. In particular, according to experiments, as shown in FIG. 4, even if a part of the gel-like member constituting the protective adhesive layer is damaged by a liquid such as a chemical, the shape may change so as to refill the damaged part. It has been confirmed. Due to the properties of such a gel-like member, it is difficult for a liquid such as a chemical to reach the adhesive layer 5 disposed inside unless the protective adhesive layer 7 is fundamentally destroyed. Even when immersed in the liquid 2, the function of the adhesive layer 5 can be maintained for a long time. In this embodiment, the protective adhesive layer 7 uses a single solid gel-like member, but it may be a laminated body of gel-like sheets having a predetermined thickness, or when a chemical solution or the like is touched. You may employ | adopt the gel-like member which gelatinizes.

  Further, when the liquid-resistant sheet 31 is exposed to the liquid 2 and the gel-like protective adhesive layer is gradually damaged, depending on the thickness and specific gravity of the outer sheet 10 and the specific gravity and viscosity of the exposed liquid 2. When at least the specific gravity of the outer sheet 10 is larger than the specific gravity of the liquid 2 to be exposed, the outer sheet 10 gradually becomes gravity as the gel-like member is damaged by the liquid such as a chemical, as in the state shown in FIG. Will hang down. For this reason, it is possible to add a function of preventing the penetration of the liquid 2 at the peripheral edge of the outer sheet 10, and it is further difficult to reach the adhesive layer 5 in which the liquid 2 is disposed. Since the outer peripheral portions of the outer sheet 10 and the protective adhesive layer 7 are slanted from the beginning by the thickness of the inner sheet 9 and the adhesive layer 5, the gel-like member is damaged by a liquid such as a chemical as it is damaged. It becomes easy to hang down further with the gravity of the sheet 10. For this reason, it is possible to further add a function of preventing the penetration of the liquid 2 at the peripheral edge of the outer sheet 10, and it becomes even more difficult to reach the adhesive layer 5 in which the liquid 2 is disposed.

  Also, as described in the second embodiment, as in the enlarged view of FIG. 7, due to the nature of the gel-like member, liquids such as chemicals are present inside unless the protective adhesive layer 7 is fundamentally destroyed. It is difficult to reach the disposed adhesive layer 5, and even when the liquid-resistant sheet 31 is immersed in the liquid 2, the function of the adhesive layer 5 can be maintained for a long time. For example, even if the liquid 2 partially enters from the surface of the outer sheet 10 and the surface 4 a of the adherend 4, the sealed air layer 8 is between the protective adhesive layer 7 and the adhesive layer 5. By being present, the labyrinth effect by the air layer 8 makes it difficult for a large amount of the liquid 2 to reach the outer edge 5a of the adhesive layer, and the adhesive function of the adhesive layer 5 can be maintained for a long time.

  In addition, as described above, when the protective adhesive layer 7 is not a protective adhesive layer having a gel-like form from the beginning, but is an adhesive that swells by reacting with a liquid to become a gel, the expanded gel is applied. The gaps are closed by closely entering minute irregularities that cannot be confirmed with the naked eye on the surface 4a of the body 4 and the surface 6a of the sheet body 6.

  Further, in the case of the pressure-sensitive adhesive that swells into a gel by reacting with the liquid 2, the protective adhesive layer outer edge portion 7a further swells due to the surface tension of the expanded gel, and the protective pressure-sensitive adhesive layer 7 Even when the amount that can be held increases and the sheet is exposed to the liquid 2, the time for the protective adhesive layer 7 to become a wall becomes long, the liquid 2 does not reach the adhesive layer 5, and the adhesive of the adhesive layer 5 over a long period of time. The function can be maintained.

  The position of the air layer 8 and its width may be any position as long as the adhesive function of the protective adhesive layer 7 and the adhesive layer 5 is exhibited, and the width is not particularly limited. As the width of the adhesive increases, that is, the distance between the protective adhesive layer 7 and the adhesive layer 5 increases, the liquid that has penetrated from the protective adhesive layer 7 due to the labyrinth effect does not reach the outer edge 5a of the adhesive layer, The adhesive function of the layer 5 can be maintained.

  In FIG. 7, an air layer 8 is formed between the inner sheet 9 and the protective adhesive layer 7, but even if the air layer 8 is formed here, the air layer 8 is not formed. Either may be sufficient.

  Next, experimental results comparing the liquid resistance of the sheet with and without the protective adhesive layer 7 are shown. As an example when the sheet has the protective adhesive layer 7, the liquid-resistant sheet 1 of the first embodiment described above is used, and as a comparative example when the protective adhesive layer 7 is not present, as shown in FIG. The sheet of the comparative example consisting only of 5 and the sheet body 6 was used.

  The adherend 4 was glass, the liquid 2 was toluene, and the same adhesive was used for the adhesive layer 5 and the base material for the sheet body 6. The size of the pressure-sensitive adhesive layer 5 of the liquid-resistant sheet 1 is 21 mm × 13 mm, and the total size (the size of the outer frame of the protective adhesive layer 7 and the sheet body 6) is 24 mm × 16 mm. The size of the pressure-sensitive adhesive layer 5 and the sheet body 6 was set to 24 mm × 16 mm, which is the same as the size of the entire liquid-resistant sheet 1. Each liquid-resistant sheet 1 and a comparative example sheet are adhered to the inside of the glass container, a few drops of toluene are dropped on each sheet in the glass container, and immediately after the dropping, the toluene is spread over the whole with a cotton swab, and the bottom surface of the glass container We confirmed that the sheet was peeled off by visual inspection, and rubbed the surface of the sheet with a load of 1 kgf for each of the 6 cases in which the sheet was completely peeled off from the glass. did.

  As a result of the experiment, the sheet of the comparative example without the protective adhesive layer 7 was peeled off after 125 minutes (2 hours and 5 minutes) on average, but the liquid-resistant sheet 1 of the first embodiment having the protective adhesive layer 7 is On the average, it peeled off from the glass container after 316 minutes (5 hours and 16 minutes). Below, the experimental results of toluene resistance are shown in a table and a graph.

  Thus, even if the liquid which inhibits the function of the adhesive layer which has fixed the sheet | seat with respect to the to-be-adhered body reaches | attains the sheet | seat outer periphery by providing a protective adhesive layer, a protective adhesive layer of the liquid It was confirmed that the adhesive function of the adhesive layer can be maintained for a long time by preventing reaching to the adhesive layer and has liquid resistance. Similarly, for the liquid-resistant sheet 31 of the third embodiment, the base material of the inner sheet 9 and the outer sheet 10 is the same as that of the sheet body 6, and the same adhesive is used for the adhesive layer 5. As a result of the experiment, it was peeled off from the glass container after 340 minutes, and it was confirmed that the liquid-resistant sheet 1 of the first embodiment had liquid resistance.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the second embodiment, the gel-like protective adhesive layer 7 is formed so as to provide one frame on the outer periphery of the adhesive layer 5, but a plurality of air is provided so as to provide a plurality of frames having different sizes. The labyrinth effect can be increased by providing the layers 8 and the plurality of protective adhesive layers 7 alternately.

  Also in the third embodiment, the gel-like protective adhesive layer 7 is formed in a single-surface shape so as to cover the adhesive layer 5 and the inner sheet 9, but outside the inner sheet position 9 a in the protective adhesive layer 7. The labyrinth effect can be increased by providing the plurality of air layers 8 and the plurality of protective adhesive layers 7 alternately so as to provide a plurality of frames of the protective adhesive layers 7 having different sizes.

  Moreover, although the magnitude | size of the inner sheet 9 and the adhesion layer 5 is substantially the same in 3rd Embodiment, the magnitude | sizes which become a shape into which any one goes inward may differ. Further, the sizes of the outer sheet 10 and the protective adhesive layer 7 are also substantially the same, but they may be different in size so that one of them enters the inside.

  In the third embodiment, the base sheet is nine inner sheets and ten outer sheets, but a plurality of inner sheets and a plurality of outer sheets are laminated via an adhesive layer or the like. It may be.

1 Liquid-resistant sheet 2 Liquid 3 Glass container (beaker)
4 Adhesive body 4a Adhesive surface 5 Adhesive layer 5a Adhesive layer outer edge 6 Sheet body 6a Sheet main surface 7 Protective adhesive layer 7a Protective adhesive layer outer edge 8 Air layer 9 Inner sheet 9a Inner sheet position 10 Outer sheet 11 Release sheet

Claims (3)

  It is a sheet that is provided with an adhesive layer on at least one surface of the front and back of the sheet body, and is attached to an adherend through the adhesive layer, and is a gel that surrounds the adhesive layer around the adhesive layer A liquid-resistant sheet comprising a protective adhesive layer made of a member.   The liquid-resistant sheet according to claim 1, wherein an air layer is formed between the protective adhesive layer and the adhesive layer.   The liquid-resistant sheet is formed by connecting an inner sheet having the adhesive layer and an outer sheet having the protective adhesive layer, and the outer sheet covers the inner sheet from the outside, and the protective adhesive layer The liquid-resistant sheet according to claim 1, wherein the liquid-resistant sheet is configured to surround an outer peripheral portion of the inner sheet.

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