JP5202506B2 - Sealing method, sealing material and sealing structure - Google Patents

Description

  The present invention relates to a sealing method, a sealing material and a sealing structure, and more particularly to a sealing method suitably used for sealing a gap between an opening of an outer wall and an insertion member, a sealing material used for the sealing method, and a sealing structure.

Conventionally, an opening (through hole) is formed in the outer wall of a building or the like that penetrates the thickness direction of the building, and a duct (conduit) is inserted into the outer wall to communicate the interior and exterior of the building via the duct. It is well known that the building is ventilated.
On the other hand, a gap is likely to be formed between the inner peripheral surface of the opening and the outer peripheral surface of the duct. Therefore, water may enter the inside of the building from the outside through the gap.

  In order to prevent the intrusion of water, for example, a duct is first inserted into the opening of the outer wall, and then caulking material is filled between the inner peripheral surface of the opening of the outer wall and the outer peripheral surface of the duct. Thus, it has been proposed to seal the gap between them (for example, see Patent Document 1).

JP 2000-120189 A

However, in Patent Document 1, the caulking material is cracked due to vibration generated on the outer wall, or another gap is formed between the caulking material and the inner peripheral surface of the opening of the outer wall and / or the outer peripheral surface of the duct. May occur. In that case, there exists a malfunction that the sealing performance around a duct falls.
In addition, it is necessary to cure the filled caulking material, and there is a problem that it takes time.

Furthermore, it is necessary to fill the caulking material in an amount corresponding to the size of the gap, and there is a problem that it takes time and effort. Further, the caulking material may overflow from the gap, and in this case, there is a problem that the aesthetic appearance around the duct is lowered.
The object of the present invention is to provide excellent sealing performance between the opening of the outer wall and the insertion member easily and in a short time, and to ensure excellent sealing performance over a long period of time. An object of the present invention is to provide a sealing method, a sealing material, and a sealing structure capable of preventing deterioration in aesthetic appearance.

  In order to achieve the above object, a sealing method of the present invention is a sealing method for sealing a gap between an opening that penetrates the thickness direction of an outer wall and an insertion member that is inserted into the opening. A first adhesive portion laminated on the surface of the elastic layer, a second adhesive portion laminated on the back surface of the elastic layer, and a release film laminated on the surface of the first adhesive portion. A sealing material preparing step of preparing a sealing material; a first fixing step of fixing the elastic layer to the outer peripheral surface of the insertion member by bonding the second adhesive portion to the outer peripheral surface of the insertion member; By pressing the fixed insertion member into the opening portion of the outer wall so that the release film is brought into close contact with the inner peripheral surface of the opening portion, the elastic layer and the opening portion of the outer wall are Fill the gap between the insertion member And peeling the release film from the first adhesive portion, thereby adhering the first adhesive portion to the inner peripheral surface of the opening of the outer wall, thereby attaching the elastic layer to the outer wall. It has the 2nd fixing process fixed to the internal peripheral surface of the said opening part, It is characterized by the above-mentioned.

According to this sealing method, the elastic layer is fixed to the outer peripheral surface of the insertion member in the first fixing step, and the elastic layer is fixed to the inner peripheral surface of the opening of the outer wall in the second fixing step. The gap between the opening of the outer wall and the insertion member can be reliably sealed.
In addition, it is possible to save the trouble of curing the elastic layer after press-fitting, and the gap can be sealed in a short time.

Further, since the elastic layer has elasticity, it can absorb even if the outer wall vibrates, and therefore, excellent sealing performance can be ensured over a long period of time.
Furthermore, in the second fixing step, the first adhesive part is bonded to the inner peripheral surface of the opening of the outer wall by peeling the release film from the first adhesive part, so that the elastic layer is attached to the outer wall by a simple method. It can fix to the internal peripheral surface of an opening part.

Furthermore, since the insertion member to which the elastic layer is fixed is press-fitted into the opening of the outer wall, it is possible to effectively prevent the elastic layer from leaking from the gap between the opening of the outer wall and the insertion member. Therefore, it is possible to prevent a decrease in the appearance of the outer wall.
As a result, with this sealing method, it is possible to easily and quickly impart excellent sealing performance to the gap between the opening of the outer wall and the insertion member, and to ensure excellent sealing performance over a long period of time. Moreover, the fall of the beauty | look of an outer wall can be prevented.

  In the sealing method of the present invention, the first fixing step includes a first winding step of winding the second adhesive portion around the outer peripheral surface of the insertion member, and the first adhesive portion on the surface of the elastic layer. A second winding step for winding, wherein in the first winding step, the second adhesive portion is inserted from the one end in the winding direction along the outer peripheral surface of the insertion member toward the other end in the winding direction. It is preferable to sequentially wind around the outer peripheral surface of the member, and in the second winding step, sequentially wind the first adhesive portion around the surface of the elastic layer from one end in the winding direction toward the other end in the winding direction. It is.

In this sealing method, in the first winding step, the second adhesive portion is sequentially wound around the outer peripheral surface of the insertion member from the one end in the winding direction toward the other end in the winding direction. It can be smoothly and reliably bonded to the outer peripheral surface of the member.
Further, in the second winding step, the first adhesive portion is wound sequentially around the surface of the elastic layer from the one end portion in the winding direction toward the other end portion in the winding direction. It can be smoothly and reliably bonded.

Therefore, the gap between the opening of the outer wall and the insertion member can be more easily and reliably sealed.
In the sealing method of the present invention, the winding direction of the second adhesive portion in the first winding step and the winding direction of the first adhesive portion in the second winding step are the same direction. Is preferred.

In this sealing method, since the winding of the second adhesive portion and the first adhesive portion is performed in the same direction in the first winding step and the second winding step, respectively, the first winding step to the second winding step are performed. It is possible to smoothly shift to the winding process.
In the sealing method of the present invention, in the sealing material preparation step, the sealing material including an adhesive layer continuously extending in the longitudinal direction is prepared, and the adhesive layer is laminated in advance on the back surface of the elastic layer. The second adhesive part supported by the elastic layer, the first adhesive part exposed from the elastic layer and connected to the second adhesive part, the first adhesive part, and the second adhesive part, A connecting adhesive portion that connects between the two, and the first fixing step further includes a step of interposing the connecting adhesive portion between both ends of the elastic layer in the winding direction after the first winding step. It is suitable to have.

In this sealing method, since the connecting adhesive portion is interposed between both end surfaces of the elastic layer in the winding direction, the sealing property between both end surfaces of the elastic layer in the winding direction can be improved.
In the sealing method of the present invention, it is preferable that both end surfaces of the elastic layer in the winding direction are formed to be inclined with respect to the thickness direction of the elastic layer.
According to this sealing method, the connection adhesive portion can be interposed between both end surfaces of the elastic layer in the winding direction in both the winding direction and the thickness direction of the elastic layer. Therefore, the sealing performance between the both end surfaces of the elastic layer in the winding direction can be improved.

Further, when tension in the winding direction is generated in the elastic layer, both ends of the elastic layer in the winding direction may be pulled in directions away from each other, and a gap may be generated between them.
However, according to this sealing method, since both end surfaces of the elastic layer in the winding direction are inclined with respect to the thickness direction of the elastic layer, overlapping portions in the thickness direction of both end surfaces of the elastic layer in the winding direction are formed. Is formed along the winding direction.

Therefore, even if both ends of the elastic layer in the winding direction are somewhat separated from each other, an overlapping portion in the thickness direction of both ends of the elastic layer in the winding direction can be secured, so that the sealing properties of both ends of the elastic layer in the winding direction are ensured. be able to.
In the sealing method of the present invention, the pressure-sensitive adhesive layer of the sealing material in the sealing material preparation step extends from one end in the winding direction of the second pressure-sensitive adhesive portion toward one side in the winding direction, and from the elastic layer. The first fixing step includes attaching the extension portion to an outer peripheral surface of the insertion member before the first winding step, thereby exposing the elastic layer to the insertion member. It is preferable to further include a step of temporarily fixing the outer peripheral surface of the second adhesive portion, and in the first winding step, the other end portion in the winding direction of the second adhesive portion is overlapped with the extending portion.

In this sealing method, since the elastic layer is temporarily fixed to the outer peripheral surface of the insertion member, the first winding step can be reliably performed.
Further, in the first winding step, the other end portion in the winding direction of the second adhesive portion is overlapped with the extending portion, so that the elastic layer can be firmly bonded to the outer peripheral surface of the insertion member.
The sealing material of the present invention is a sealing material for sealing a gap between an opening that penetrates the thickness direction of the outer wall and an insertion member that is inserted into the opening, and is continuous in the longitudinal direction. An adhesive layer extending; an elastic layer laminated on one side in the longitudinal direction of the surface of the adhesive layer; and a release film laminated on the other side in the longitudinal direction of the surface of the adhesive layer. A portion where the elastic layer is laminated is defined as a second adhesive portion bonded to the outer peripheral surface of the insertion member, is exposed from the elastic layer, is connected to the second adhesive portion, and the mold release The portion where the film is laminated is defined as a first adhesive portion that is bonded to the inner peripheral surface of the opening of the outer wall when the release film is peeled off.

According to this sealing material, the elastic layer can be fixed to the outer peripheral surface of the insertion member by the second adhesive portion, and the elastic layer can be fixed to the inner peripheral surface of the opening portion of the outer wall by the first adhesive portion. Therefore, the clearance gap between the opening part of an outer wall and an insertion member can be sealed reliably.
In addition, it is possible to save the trouble of curing the elastic layer after press-fitting, and the gap can be sealed in a short time.

Further, since the elastic layer has elasticity, it can absorb even if the outer wall vibrates, and therefore, excellent sealing performance can be ensured over a long period of time.
Further, when the release film is peeled off from the first adhesive portion, the first adhesive portion is adhered to the inner peripheral surface of the opening portion of the outer wall, so that the elastic layer is attached to the opening portion of the outer wall by a simple method. It can be fixed to the inner peripheral surface.

As a result, it is possible to easily and easily provide a sealing property excellent in the gap between the opening of the outer wall and the insertion member.
Moreover, in the sealing material of this invention, it is suitable for the said adhesive layer that the part which connects between the said 1st adhesion part and the said 2nd adhesion part is divided as a connection adhesion part.
In this sealing material, if the connecting adhesive portion is interposed between both end surfaces in the longitudinal direction of the elastic layer, the sealing performance between the both end surfaces in the longitudinal direction of the elastic layer can be improved.

Moreover, in the sealing material of this invention, it is suitable that the longitudinal direction both end surfaces of the said elastic layer are formed in the inclined form with respect to the thickness direction of an elastic layer.
According to this sealing material, the connection adhesive portion can be interposed between both end surfaces of the elastic layer in the winding direction in both the winding direction and the thickness direction of the elastic layer. Therefore, the sealing performance between the both end surfaces of the elastic layer in the winding direction can be improved.

Further, when tension in the winding direction is generated in the elastic layer, both ends of the elastic layer in the winding direction may be pulled in directions away from each other, and a gap may be generated between them.
However, according to this sealing material, both end surfaces of the elastic layer in the winding direction are formed to be inclined with respect to the thickness direction of the elastic layer. Is formed along the winding direction.

Therefore, even if the both ends in the winding direction of the elastic layer are somewhat separated from each other, it is possible to ensure the overlapping portion in the thickness direction of the both ends in the winding direction of the elastic layer, so that the sealing properties at both ends in the winding direction of the elastic layer are secured be able to.
In the sealing material of the present invention, the adhesive layer includes a portion that extends from one end in the longitudinal direction of the second adhesive portion in the longitudinal direction and that is exposed from the elastic layer as an extended portion. It is preferable that

In this sealing material, if the extending portion is bonded to the outer peripheral surface of the insertion member, the elastic layer can be temporarily fixed to the outer peripheral surface of the insertion member. Therefore, the second adhesive portion is bonded to the outer peripheral surface of the insertion member, and the elastic layer can be firmly bonded to the outer peripheral surface of the insertion member.
The seal structure of the present invention is a seal structure for sealing a gap between an opening that penetrates the thickness direction of the outer wall and an insertion member that is inserted into the opening, and includes an elastic layer and the elastic layer. A second adhesive portion laminated on the back surface of the layer and adhered to the outer peripheral surface of the insertion member, and a first adhesive portion laminated on the surface of the elastic layer and adhered to the inner peripheral surface of the opening of the outer wall Is filled in a gap between the opening of the outer wall and the insertion member.

According to this seal structure, the elastic layer can be fixed to the outer peripheral surface of the insertion member by the second adhesive portion, and the elastic layer can be fixed to the inner peripheral surface of the opening portion of the outer wall by the first adhesive portion. Therefore, the clearance gap between the opening part of an outer wall and an insertion member can be sealed reliably.
In addition, it is possible to save the trouble of curing the elastic layer after press-fitting, and the gap can be sealed in a short time.

Further, since the elastic layer has elasticity, it can absorb even if the outer wall vibrates, and therefore, excellent sealing performance can be ensured over a long period of time.
As a result, it is possible to easily impart excellent sealing performance to the gap between the opening of the outer wall and the insertion member, and it is possible to ensure excellent sealing performance over a long period of time.
In the sealing structure of the present invention, the sealing material includes an adhesive layer that extends continuously in the longitudinal direction, and the adhesive layer is wound around the outer peripheral surface of the insertion member, whereby the elastic layer is The second adhesive part for fixing to the outer peripheral surface of the insertion member, and the second adhesive part connected to the second adhesive part and wound around the surface of the elastic layer, thereby allowing the elastic layer to move to the inner periphery of the opening of the outer wall. A first adhesive part for fixing to a surface; and a connection adhesive part that connects the first adhesive part and the second adhesive part, wherein the connection adhesive part is a winding direction of the elastic layer. It is preferable to be interposed between both end faces.

In this seal structure, since the connection adhesive portion is interposed between both end surfaces of the elastic layer in the winding direction, it is possible to improve the sealing performance between both end surfaces of the elastic layer in the winding direction.
In the seal structure of the present invention, it is preferable that both end surfaces of the elastic layer in the winding direction are formed to be inclined with respect to the thickness direction of the elastic layer.
According to this seal structure, the connection adhesive portion can be interposed between both end surfaces of the elastic layer in the winding direction in both the winding direction and the thickness direction of the elastic layer. Therefore, the sealing performance between the both end surfaces of the elastic layer in the winding direction can be improved.

Further, when tension in the winding direction is generated in the elastic layer, both ends of the elastic layer in the winding direction may be pulled in directions away from each other, and a gap may be generated between them.
However, according to this seal structure, both end surfaces of the elastic layer in the winding direction are inclined with respect to the thickness direction of the elastic layer. Is formed along the winding direction.

Therefore, even if both ends of the elastic layer in the winding direction are somewhat separated from each other, an overlapping portion in the thickness direction of both ends of the elastic layer in the winding direction can be secured, so that the sealing properties of both ends of the elastic layer in the winding direction are ensured. be able to.
In the seal structure of the present invention, the pressure-sensitive adhesive layer includes an extended portion that extends from one end in the winding direction of the second adhesive portion toward one side in the winding direction and is exposed from the elastic layer, It is preferable that the extending portion is overlapped with the other end portion in the winding direction of the second adhesive portion.

In this seal structure, if the extending portion is bonded to the outer peripheral surface of the insertion member, the elastic layer can be temporarily fixed to the outer peripheral surface of the insertion member.
Moreover, since the other end part of the winding direction of a 2nd adhesion part is overlaid on the extension part, an elastic layer can be firmly adhere | attached on the outer peripheral surface of an insertion member.

  According to the sealing method and the sealing structure of the present invention in which the sealing material of the present invention is used, it is possible to easily and easily provide excellent sealing performance in the gap between the opening of the outer wall and the insertion member, The sealing performance can be ensured over a long period of time, and the appearance of the outer wall can be prevented from deteriorating.

FIG. 1 shows a cross-sectional view of one embodiment of the sealing material of the present invention (a mode in which the first adhesive portion is exposed from the elastic layer). FIG. 2 shows a plan view of the sealing material shown in FIG. FIG. 3 is a perspective view of an outer wall and a duct in which an embodiment of the seal structure of the present invention is employed. FIG. 4 is a cross-sectional view for explaining an embodiment of the first fixing step of the sealing method of the present invention, wherein (a) is a step of temporarily fixing the elastic layer to the outer peripheral surface of the duct, (b) The 1st winding process which winds a 2nd adhesion part around the outer peripheral surface of a duct, (c) shows the 2nd winding process which winds a 1st adhesion part on the surface of an elastic layer. FIG. 5 shows an enlarged cross-sectional view of both ends in the winding direction of the elastic layer shown in FIG. FIG. 6 is a perspective view illustrating a first fixing step for fixing the elastic layer to the outer peripheral surface of the duct. FIG. 7 is a perspective view for explaining a process of press-fitting the duct into the opening of the outer wall. FIG. 8 is a perspective view illustrating a second fixing step for fixing the elastic layer to the inner peripheral surface of the opening of the outer wall. FIG. 9 shows a cross-sectional view of another embodiment of the sealing material of the present invention (embodiment in which the first adhesive portion covers the elastic layer in advance). FIG. 10 is a perspective view for explaining a first fixing step of fixing the elastic layer of the sealing material of FIG. 9 to the outer peripheral surface of the duct. FIG. 11 is a perspective view for explaining a process of press-fitting the duct into the opening of the outer wall. FIG. 12 is a perspective view illustrating a second fixing step for fixing the elastic layer to the inner peripheral surface of the opening of the outer wall. FIG. 13 shows a cross-sectional view of another embodiment of the sealing material of the present invention (a mode in which both end surfaces in the longitudinal direction of the elastic layer are inclined to the other side in the longitudinal direction as it goes upward). FIG. 14 is an enlarged cross-sectional view for explaining the first fixing step with the sealing material of FIG. 13, wherein (a) is a first winding step for winding the second adhesive portion around the outer peripheral surface of the duct; ) Shows a second winding step of winding the first adhesive portion around the surface of the elastic layer. FIG. 15 shows a cross-sectional view of another embodiment of the sealing material of the present invention (a mode in which both end surfaces in the longitudinal direction of the elastic layer incline toward one side in the longitudinal direction as it goes upward). FIG. 16 is an enlarged cross-sectional view for explaining the first winding step with the sealing material of FIG.

  1 is a cross-sectional view of an embodiment of the sealing material of the present invention, FIG. 2 is a plan view of the sealing material shown in FIG. 1, and FIG. 3 is an outer wall in which an embodiment of the sealing structure of the present invention is adopted. 4 is a perspective view of the duct, FIG. 4 is a cross-sectional view illustrating one embodiment of the first embodiment fixing step of the sealing method of the present invention, and FIG. 5 is a view of both ends of the elastic layer shown in FIG. FIG. 6 is an enlarged cross-sectional view, FIG. 6 is a perspective view illustrating a first fixing process for fixing the elastic layer to the outer peripheral surface of the duct, and FIG. 7 is a perspective view illustrating a process of press-fitting the duct into the opening of the outer wall. These show the perspective view explaining the 2nd fixing process which fixes an elastic layer to the internal peripheral surface of the opening part of an outer wall.

In FIG. 2, a first release film 8 and a second release film 9 which will be described later are omitted in order to clearly show the arrangement of the elastic layer 3 which will be described later.
1 and 2, this sealing material 1 seals a gap between an opening 22 that penetrates the thickness direction of the outer wall 21 shown in FIG. 3 and a duct 23 as an insertion member inserted into the opening 22. Used for.

The sealing material 1 is formed in a substantially rectangular flat band shape in plan view extending in the longitudinal direction. The sealing material 1 includes an adhesive layer 2 extending continuously in the longitudinal direction, an elastic layer 3 laminated on one side in the longitudinal direction of the surface of the adhesive layer 2, and the other longitudinal side of the surface of the adhesive layer 2. And a first release film 8 as a release film to be laminated.
The pressure-sensitive adhesive layer 2 is formed in a long flat band shape.

The pressure-sensitive adhesive layer 2 is formed, for example, from a pressure-sensitive adhesive composition having a watertight action. Examples of such a pressure-sensitive adhesive composition include a rubber-based pressure-sensitive adhesive composition and a resin-based pressure-sensitive adhesive composition. It is done.
The rubber-based pressure-sensitive adhesive composition is, for example, a pressure-sensitive adhesive composition containing rubber as a main component, and specifically a known pressure-sensitive adhesive composition in which rubber is uniformly blended and dispersed. Examples of such rubber include butyl rubber, recycled butyl rubber, polyisobutylene, rubber asphalt, and the like.

Examples of the resin-based pressure-sensitive adhesive include acrylic pressure-sensitive adhesive compositions, silicone-based pressure-sensitive adhesive compositions, polyurethane-based pressure-sensitive adhesive compositions, and polyester-based pressure-sensitive adhesive compositions.
These pressure-sensitive adhesives preferably include rubber-based pressure-sensitive adhesive compositions, and more preferably, butyl rubber-based pressure-sensitive adhesive compositions containing butyl rubber as a main component from the viewpoint of durability.

The butyl rubber-based pressure-sensitive adhesive composition contains, for example, butyl rubber as an essential component, and contains a tackifier, a filler, and a softening agent as optional components.
The kind of butyl rubber is not particularly limited, and examples thereof include recycled butyl rubber and synthetic butyl rubber. Preferably, reclaimed butyl rubber rich in processability is used.
The Mooney viscosity of butyl rubber is, for example, 30 to 60 (ML1 + 4, 100 ° C.), 35 to 55 (ML1 + 4, 100 ° C.).

Butyl rubber can be used alone or in combination of two or more different physical properties.
Examples of the tackifier include rosin resin, terpene resin, coumarone indene resin, petroleum resin, phenol resin and the like.
The softening point of the tackifier is, for example, 50 to 150 ° C, preferably 50 to 130 ° C.

Examples of the filler include magnesium oxide, calcium carbonate, talc, mica, clay, mica powder, bentonite, silica, alumina, aluminum hydroxide, aluminum silicate, titanium oxide, carbon black, aluminum powder, and glass balloon. .
Examples of the softening agent include polybutene and process oil.

Each component of the optional components can be used alone or in combination of two or more.
The blending ratio of the total amount of the optional components is, for example, 100 to 1000 parts by weight, preferably 200 to 500 parts by weight with respect to 100 parts by weight of butyl rubber.
In the optional component, the blending ratio of each component is, for example, 20 to 200 parts by weight, preferably 30 to 150 parts by weight of the tackifier, and preferably 10 to 10 parts by weight, for 100 parts by weight of butyl rubber. -300 weight part, Preferably, it is 50-200 weight part, and a softening agent is 5-50 weight part, for example, Preferably, it is 10-40 weight part.

Furthermore, a known additive added to the butyl rubber-based pressure-sensitive adhesive composition, such as a vulcanizing agent, an anti-aging agent, a plasticizer, and a vulcanization accelerator, should be added to the butyl rubber-based pressure-sensitive adhesive composition in an appropriate ratio. Can do.
In order to prepare the pressure-sensitive adhesive composition, the above-described components are blended in the above blending ratio and kneaded. Each component is kneaded by, for example, a mixing roll, a kneader, or an extruder. Preferably, they are kneaded by a kneader.

Next, the pressure-sensitive adhesive layer 2 is formed from the pressure-sensitive adhesive composition (kneaded material) obtained as described above.
In order to form the pressure-sensitive adhesive layer 2 from the pressure-sensitive adhesive composition, the above-described pressure-sensitive adhesive composition is formed into a sheet shape by a molding method such as a mixing roll, a calender roll, extrusion molding, or press molding.
Thus, the thickness of the adhesive layer 2 formed is 10-1000 micrometers, for example, Preferably, it is 100-500 micrometers.

Moreover, although not shown in figure, the adhesive layer 2 can also be formed as a laminated body of an adhesive sheet and a base material. More specifically, the pressure-sensitive adhesive layer 2 is composed of a base material and two pressure-sensitive adhesive sheets laminated on both sides thereof.
The base material is, for example, a cloth such as cotton, sufumos, chemical fiber, or a non-woven cloth, for example, paper such as Japanese paper or kraft paper, such as polyethylene terephthalate (PET), polyimide, polyether nitrile, polyether sulfone, It is formed from a synthetic resin such as polyethylene naphthalate or polyvinyl chloride.

The thickness of a base material is 1-100 micrometers, for example, Preferably, it is 10-80 micrometers.
Each pressure-sensitive adhesive sheet (front-side pressure-sensitive adhesive sheet and back-side pressure-sensitive adhesive sheet) is formed from the above-described pressure-sensitive adhesive composition, and the thickness thereof is, for example, 5 to 500 μm, preferably 100 to 400 μm, respectively. .
The elastic layer 3 is laminated on the surface of the pressure-sensitive adhesive layer 2 in the longitudinal direction so as to expose the other side portion in the longitudinal direction and one end in the longitudinal direction (corresponding to an extension portion 6 described later). In the width direction (direction perpendicular to the longitudinal direction), the entire surface of the pressure-sensitive adhesive layer 2 is laminated. The elastic layer 3 is formed in a substantially rectangular shape in a cross-sectional view along the longitudinal direction and a cross-sectional view along the width direction.

Specifically, the longitudinal end faces and the width end faces of the elastic layer 3 are formed along the thickness direction (vertical direction). Further, both end faces in the width direction of the elastic layer 3 are arranged flush with both end faces in the width direction of the pressure-sensitive adhesive layer 2 in the longitudinal direction. The length of the elastic layer 3 in the longitudinal direction is set to be substantially the same as the outer peripheral length of the duct 23.
The elastic layer 3 is formed of, for example, an elastic body having a cushioning (cushioning) action and a watertight action, and is preferably formed of a foam.

  Examples of the material for forming the elastic layer 3 include, for example, ethylene / propylene / diene rubber (EPDM), for example, α-olefin / dicyclopentadiene such as 1-butene, and cyclic having a nonconjugated double bond such as ethylidene norbornene. Or rubber copolymers containing acyclic polyene as a component, for example, ethylene / propylene rubber, ethylene / propylene terpolymer, silicone rubber, polyurethane rubber, polyamide rubber, natural rubber, polyisobutylene, polyisoprene, chloroprene rubber , Butyl rubber, nitrile butyl rubber, styrene / butadiene rubber, styrene / butadiene / styrene rubber, styrene / isoprene / styrene rubber, styrene / ethylene / butadiene rubber, styrene / ethylene / butylene / styrene rubber, styrene / ethylene Puren propylene-styrene rubber, and various rubbers such as acrylic rubber. Preferably, EPDM is used from the viewpoint of weather resistance.

  Examples of the diene constituting the EPDM include 5-ethylidene-2-norbornene, 5-propylidene-5-norbornene, dicyclopentadiene, 5-vinyl-2-norbornene, 5-methylene-2-norbornene, and 5-isopropylidene. Cyclic dienes such as 2-norbornene and norbornadiene, such as 1,4-hexadiene, 4-methyl-1,4-hexadiene, 5-methyl-1,4-hexadiene, 5-methyl-1,5-heptadiene, 6 -Chain non-conjugated dienes such as methyl-1,5-heptadiene, 6-methyl-1,7-octadiene, 7-methyl-1,6-octadiene, such as 2,3-diisopropylidene-5-norbornene And trienes such as 4-ethylidene-8-methyl-1,7-nonadiene.

Of these dienes, 5-ethylidene-2-norbornene is preferable from the viewpoint of heat resistance and weather resistance.
The Mooney viscosity of EPDM is, for example, 10 to 60 (ML1 + 4, 100 ° C.), preferably 20 to 50 (ML1 + 4, 100 ° C.).
Moreover, the diene content of EPDM is an iodine value, for example, 0.5-50 (g / 100g), Preferably, it is 10-30 (g / 100g).

EPDM can be used alone or in combination of two or more different physical properties.
And the foam of rubber | gum can be obtained by heating and foaming and bridge | crosslinking the foaming composition containing the above-mentioned rubber | gum, a foaming agent, a crosslinking agent, and an additive.
Examples of the foaming agent include heat-decomposable foaming agents such as inorganic foaming agents and organic foaming agents. Examples of the inorganic foaming agent include ammonium carbonate, ammonium hydrogen carbonate, sodium hydrogen carbonate, ammonium nitrite, sodium borohydride, azides and the like.

  Examples of organic foaming agents include N-nitroso compounds (N, N′-dinitrosopentamethylenetetramine, N, N′-dimethyl-N, N′-dinitrosotephthalamide, etc.), azo compounds, and the like. (Eg, azobisisobutyronitrile, azodicarboxylic acid amide (ADCA), barium azodicarboxylate, etc.), fluorinated alkanes (eg, trichloromonofluoromethane, dichloromonofluoromethane, etc.), hydrazine compounds (eg, Paratoluenesulfonyl hydrazide, diphenylsulfone-3,3′-disulfonylhydrazide, 4,4′-oxybis (benzenesulfonylhydrazide) (OBSH), allylbis (sulfonylhydrazide), etc.), semicarbazide compounds (for example, p-toluylene) Sulfonyl semica Bajido, 4,4' like oxybis (benzenesulfonyl semicarbazide)), triazole compound (e.g., 5-morpholyl-1,2,3,4-thiatriazole, etc.) and the like.

  Examples of the foaming agent include gas-encapsulated microcapsule foaming agents, and more specifically, heat-expandable substances (for example, isobutane, pentane, etc.) are microcapsules (for example, vinylidene chloride, acrylonitrile). And thermally expandable fine particles encapsulated in a microcapsule made of a thermoplastic resin such as acrylic acid ester or methacrylic acid ester.

These foaming agents can be used alone or in combination of two or more.
The blending ratio of the foaming agent is, for example, 0.1 to 100 parts by weight, preferably 0.5 to 50 parts by weight with respect to 100 parts by weight of rubber.
The crosslinking agent is usually a vulcanizing agent, and examples of such a vulcanizing agent include sulfur, sulfur compounds, selenium, magnesium oxide, lead monoxide, zinc oxide, organic peroxides, and polyamines. Oximes (for example, p-quinonedioxime, p, p′-dibenzoylquinonedioxime, etc.), nitroso compounds (for example, p-dinitrosobenzidine, etc.), resins (for example, alkylphenol / formaldehyde resin, melamine) -Formaldehyde condensate etc.), ammonium salts (for example, ammonium benzoate etc.) etc. are mentioned.

Of these crosslinking agents, sulfur and sulfur compounds are preferably used from the viewpoint of physical properties such as vulcanizability of the foam and durability due to foamability.
These crosslinking agents can be used alone or in combination of two or more. The blending ratio of the cross-linking agent can be determined as appropriate according to the cross-linking (vulcanization) efficiency based on the type, and when the cross-linking agent is sulfur or sulfur compounds, it is based on 100 parts by weight of rubber. For example, 0.1 to 10 parts by weight, preferably 0.5 to 5 parts by weight.

Examples of the additive include a vulcanization accelerator, a softening agent, a filler, and a foaming aid. These additives are added to rubber at an appropriate blending ratio.
And in order to prepare a foaming composition, each above-mentioned component is mix | blended by said mixing | blending ratio, and these are mixed uniformly. Moreover, in order to mix each above-described component, the above-mentioned component is knead | mixed with a mixing roll, a pressure-type kneader, an extruder etc., for example. Moreover, the foaming composition obtained is shape | molded in a sheet form with shaping | molding methods, such as a mixing roll, a calender roll, extrusion molding, and press molding, for example.

And a foam is obtained by heating above-mentioned foaming composition, for example at 450 degrees C or less, Preferably, 100-350 degreeC.
The elastic layer 3 thus formed has a density (foam weight (g) / foam volume (g / cm ³ )) of, for example, 0.01 to 0.5 g / cm ³ , preferably Is 0.05 to 0.25 g / cm ³ , and the expansion ratio (volume expansion ratio) at the time of foaming is, for example, 1.1 to 25 times, preferably 1.5 to 20 times.

Further, the repulsive force (JIS K 6767) of the elastic layer 3 at a 50% load is appropriately set according to the thickness of the first release film 8 peeled off from the first adhesive portion 4 as described later. 01 to 10 N / cm ³ , preferably 0.05 to 1 N / cm ³ , more preferably 0.1 to 0.5 N / cm ³ .
The thickness of the elastic layer 3 is 0.5-30 mm, for example, Preferably, it is 2-15 mm.

The first release film 8 is formed in a substantially rectangular flat band shape in plan view extending in the longitudinal direction, and the adhesive layer 2 (first adhesive portion 4 described later) exposed from the other side portion in the longitudinal direction of the elastic layer 3. Laminated on the surface.
More specifically, the first release film 8 is formed such that its longitudinal length is longer than the longitudinal length of the pressure-sensitive adhesive layer 2 exposed from the other longitudinal portion of the elastic layer 3. Thereby, the other end part in the longitudinal direction and the middle of the first release film 8 are laminated on the surface of the pressure-sensitive adhesive layer 2 (first adhesive part 4) exposed from the other longitudinal part of the elastic layer 3, and the adhesive The first uncoated portion that is partitioned as the first covering portion 17 that covers the adhesive layer 2, while one end in the longitudinal direction of the first release film 8 is a free end without covering the surface of the adhesive layer 2. A section 18 is defined. Moreover, the other end surface in the longitudinal direction of the first release film 8 is arranged flush with the other end surface in the longitudinal direction of the pressure-sensitive adhesive layer 2 (first adhesive portion 4).

In the first release film 8, the first covering portion 17 covers the surface of the pressure-sensitive adhesive layer 2 along the pressure-sensitive adhesive layer 2 and bends at the boundary between the first covering portion 17 and the first non-covering portion 18. The first uncovered portion 18 extends toward the front side along the other end portion 16 in the winding direction of the elastic layer 3.
The first release film 8 is formed of, for example, a film having flexibility and toughness, and specifically, as such a film, a polyethylene (PE) film, polypropylene (PP And an olefin film such as an oriented polypropylene (OPP) film, and a synthetic resin film such as an ester film such as a PET film. Preferably, an olefin film is used.

Further, the surface of the first release film 8 (the surface opposite to the surface facing the pressure-sensitive adhesive layer 2, the surface facing the inner peripheral surface of the opening 22 of the outer wall 21 described later) and / or the back surface (on the pressure-sensitive adhesive layer 2). The opposing surface) can be surface treated with a release agent such as silicone, long chain alkyl, fluorine, molybdenum sulfide.
In addition, the first release film 8 can be used as a single layer of the above-described synthetic resin film, or can be used as a laminated film in which a plurality of the above-described synthetic resin films are laminated. As such a laminated film, Examples thereof include a PE film and a laminated film in which an OPP film is laminated on the surface thereof, a PE film and a laminated film in which a polyester film is laminated on the surface thereof.

  Further, the tensile strength (JIS K 7113) of the first release film 8 is, for example, 10 MPa or more, preferably 50 MPa or more, more preferably 100 MPa or more, and usually 500 MPa or less. If the tensile strength of the first release film 8 is not within the above range, the first release film 8 is damaged when the first release film 8 is pulled out, and the first release film 8 is the first release film 8. In some cases, the adhesive portion 4 may remain between the adhesive portion 4 and the inner peripheral surface of the opening portion 22 of the outer wall 21.

The thickness of the first release film 8 is, for example, 50 to 500 μm, preferably 75 to 400 μm, and more preferably 100 to 300 μm.
In the adhesive layer 2 of the sealing material 1, a portion where the elastic layer 3 is laminated is partitioned as a second adhesive portion 5, and is exposed from the other longitudinal end of the elastic layer 3, and the second adhesive portion The part where the first release film 8 is laminated is partitioned as the first adhesive part 4.

Further, the adhesive layer 2 is exposed from the other end in the longitudinal direction of the elastic layer 3, and a portion connecting the first adhesive portion 4 and the second adhesive portion 5 is defined as a connection adhesive portion 7, and is elastic. A portion that is exposed from one end portion in the longitudinal direction of the layer 3 and extends from one end portion in the longitudinal direction of the second adhesive portion 5 toward one side in the longitudinal direction is defined as an extending portion 6.
That is, the pressure-sensitive adhesive layer 2 includes the extended portion 6, the second pressure-sensitive adhesive portion 5, the connection pressure-sensitive adhesive portion 7, and the first pressure-sensitive adhesive portion 4 successively in order from one longitudinal direction to the other.

The extending part 6 extends from one end in the longitudinal direction of the second adhesive part 5 in a substantially rectangular shape in plan view.
The second adhesive portion 5 is defined as an adhesive portion that is bonded to the outer peripheral surface of the duct 23 (see FIG. 4B) in the adhesive layer 2, and the length in the longitudinal direction is the outer periphery (outer periphery) of the duct 23. The circumferential length of the surface is set to be approximately the same length.
The connecting adhesive portion 7 is disposed adjacent to the other side in the longitudinal direction of the second adhesive portion 5 and is partitioned into a substantially rectangular shape in plan view that is long in the width direction. The length in the longitudinal direction of the connection adhesive portion 7 is set to be substantially the same as the thickness of the elastic layer 3.

The first adhesive portion 4 is disposed adjacent to the other side in the longitudinal direction of the connecting adhesive portion 7. Moreover, the 1st adhesion part 4 is an adhesion part adhere | attached on the surface of the elastic layer 3 in the adhesive layer 2 in a 1st winding process (refer FIG.4 (c)), and is a 2nd fixing process (refer FIG. 8). ) In the outer wall 21 is divided as an adhesive portion bonded to the inner peripheral surface of the opening 22.
Therefore, the length of the first adhesive portion 4 in the longitudinal direction is formed to be substantially the same as the length of the elastic layer 3 in the longitudinal direction. Further, the length in the longitudinal direction of the first adhesive portion 4 is formed to be substantially the same as the inner circumference (the length in the circumferential direction of the inner circumferential surface) of the opening 22 of the outer wall 21.

The sealing material 1 further includes a second release film 9 laminated on the surface of the extending portion 6 and a third release film 10 laminated on the back surface of the pressure-sensitive adhesive layer 2.
The second release film 9 is formed in a substantially rectangular flat band shape in plan view extending in the longitudinal direction, and the length in the longitudinal direction is longer than the length in the longitudinal direction of the extending portion 6. Thereby, the longitudinal direction one end part and the middle of the 2nd mold release film 9 are laminated | stacked on the surface of the extension part 6, and are divided as the 2nd coating | coated part 19 which coat | covers the extension part 6, On the other hand, 2nd mold release The other end in the longitudinal direction of the film 9 is partitioned as a second uncovered portion 20 that becomes a free end without covering the surface of the extending portion 6. Moreover, the longitudinal direction one end surface of the 2nd release film 9 is arrange | positioned flush | planar in the longitudinal direction one end surface of the extension part 6 (adhesive layer 2) in a longitudinal direction.

More specifically, in the second release film 9, the second covering portion 19 covers the surface of the extending portion 6 along the extending portion 6, and the second covering portion 19 and the second non-covering portion. The second uncovered portion 20 is bent toward the front side along one longitudinal end portion of the elastic layer 3.
As a film which forms the 2nd mold release film 9, the thing similar to the film which forms the above-mentioned 1st mold release film 8 is mentioned.

The thickness of the 2nd mold release film 9 is the same as the thickness of the 1st mold release film 8, Preferably, it is 100-300 micrometers.
The third release film 10 is formed in a substantially rectangular flat strip shape in plan view extending in the longitudinal direction, and is laminated on the entire back surface of the pressure-sensitive adhesive layer 2. That is, the peripheral end surfaces (both end surfaces in the longitudinal direction and both end surfaces in the width direction) of the third release film 10 are arranged flush with the peripheral end surface of the pressure-sensitive adhesive layer 2 in plan view.

As a film for forming the third release film 10, in addition to the same film as the first release film 8 described above, paper, rubber sheet, cloth, nonwoven fabric, net, foam sheet, metal foil, These laminated sheet bodies are mentioned. Preferably, surface-treated paper is used.
The thickness of the 3rd release film 10 is the same as the thickness of the 1st release film 8, Preferably, it is 100-300 micrometers.

In order to obtain this sealing material 1, first, the pressure-sensitive adhesive layer 2 is laminated on the surface of the third release film 10, then the elastic layer 3 is laminated on the surface of the pressure-sensitive adhesive layer 2, and then the first The release film 8 and the second release film 9 are laminated on the surface of the pressure-sensitive adhesive layer 2 exposed from the elastic layer 3 (sealing material preparation step).
Next, a sealing method for sealing a gap between the opening 22 of the outer wall 21 and the duct 23 using the sealing material 1 will be described.

As shown in FIG. 3, the opening 22 of the outer wall 21 is opened (penetrated) in a columnar shape having an axis in the thickness direction of the outer wall 21.
The duct 23 is formed in a cylindrical shape extending in the direction along the axis of the opening 22 of the outer wall 21 (front-rear direction), and the shape of the tip thereof corresponds to the shape of the opening 22 of the outer wall 21. Is formed.

More specifically, the front end portion of the duct 23 is formed in a cylindrical shape whose diameter is slightly reduced from the opening portion 22 of the outer wall 21.
The width (diameter in the radial direction) of the gap between the inner peripheral surface of the opening 22 of the outer wall 21 and the outer peripheral surface of the duct 23 is a value obtained by subtracting the outer diameter of the duct 23 from the inner diameter of the opening of the outer wall 21 by 2. The value is divided, for example, 2 to 15 mm, and further 5 to 10 mm.

Next, in this method, as shown in FIGS. 4 and 6, the elastic layer 3 of the sealing material 1 obtained (prepared) is fixed to the outer peripheral surface of the duct 23 (first fixing step).
That is, first, as shown in FIGS. 4A and 4B, the extending portion 6 and the second adhesive portion 5 are wound around the outer peripheral surface of the duct 23 (first winding step).
Specifically, first, as shown in FIG. 4A, the third release film 10 is peeled off from the back surface of the extending portion 6, and the extending portion 6 is bonded to the outer peripheral surface of the duct 23.

In addition, as shown in FIG. 6, the extending portion 6 has a duct 23 such that one end surface in the width direction of the extending portion 6 is flush with the front end surface of the duct 23 in the front-rear direction of the duct 23. Position on the outer peripheral surface of
Thereby, the elastic layer 3 is temporarily fixed to the outer peripheral surface of the duct 23.
Subsequently, as shown in FIG. 4B, the second adhesive portion 5 is bonded to the outer peripheral surface of the duct 23.

Specifically, as shown by the phantom line in FIG. 4A, the second adhesive portion 5 is wound around the outer peripheral surface of the duct 23.
Specifically, while peeling the third release film 10 from the back surface of the second adhesive portion 5, the second adhesive portion 5 is moved from the longitudinal direction one end portion (winding direction one end portion) 13 to the longitudinal direction other end portion (winding). It winds around the outer peripheral surface of the duct 23 sequentially toward the direction other end portion 14. That is, the winding direction one end portion 13 of the second adhesive portion 5, the winding direction middle portion, and the winding direction other end portion 14 are sequentially placed on the outer peripheral surface of the duct 23 along the clockwise direction around the duct 23. Wrap.

Further, as shown in FIG. 5, the second release film 9 is peeled off from the extending portion 6 (adhesive layer 2), and the other end portion 14 in the winding direction of the second adhesive portion 5 is connected to the extending portion 6. Superimpose on the surface.
By this first winding step, both ends of the elastic layer 3 in the winding direction (corresponding to both ends in the longitudinal direction in FIGS. 1 and 2) 15 and 16 are opposed to each other in the winding direction (circumferential direction of the duct 23). The

Further, after the first winding step, as shown in FIG. 5, the third release film 10 is peeled off from the surface of the connection adhesive portion 7, and the connection adhesive portion 7 is placed between both end surfaces in the winding direction of the elastic layer 3. To intervene.
Thereby, the both end surfaces in the winding direction of the elastic layer 3 are bonded via the connecting adhesive portion 7.
Next, as shown in the phantom line (two-dot chain line) in FIG. 4B and FIG. 4C, the first adhesive portion 4 is bonded to the surface of the elastic layer 3. Specifically, the 1st adhesion part 4 is wound around the surface of the elastic layer 3 (2nd winding process).

  Specifically, as shown by an imaginary line in FIG. 4B, the first pressure-sensitive adhesive portion 4 is moved to one end in the longitudinal direction (winding direction) while peeling the third release film 10 from the back surface of the first pressure-sensitive adhesive portion 4. The one end portion 11 is wound around the surface of the elastic layer 3 sequentially from the other end portion in the longitudinal direction (the other end portion in the winding direction) 12. That is, the winding direction one end portion 11 of the first adhesive portion 4, the winding direction halfway and the winding direction other end portion 12 are sequentially set to the elastic layer 3 (the winding direction one end portion 13, the winding direction halfway and the winding direction). Wrap around the surface of the other end 14) in a clockwise direction around the duct 23.

Moreover, the winding direction of the 2nd adhesion part 5, ie, the direction shown by the arrow of Fig.4 (a), and the winding direction of the 1st adhesion part 4, ie, the direction shown by the arrow of FIG.4 (b), are. In the same direction.
By this second winding step, the first adhesive portion 4 is laminated on the entire surface of the elastic layer 3. Moreover, the width direction one end surface of the sealing material 1 (the adhesive layer 2, the elastic layer 3, and the first release film 8) is disposed so as to be flush with the front end surface of the duct 23 in the front-rear direction of the duct 23. The

As a result, the elastic layer 3 is fixed to the outer peripheral surface of the duct 23 as shown in FIG.
Next, as shown in the arrow of FIG. 6 and FIG. 7, the elastic layer 3 is filled in the gap between the opening 22 of the outer wall 21 and the duct 23.
In order to fill the gap between the elastic layer 3, the duct 23 to which the elastic layer 3 is fixed is press-fitted into the opening 22 of the outer wall 21.

The duct 23 is press-fitted into the opening 22 so that the surface of the first release film 8 is in close contact with the inner peripheral surface of the opening 22 of the outer wall 21.
In the press-fitting of the duct 23, the first release film 8 is pressed from the inner peripheral surface of the opening 22 of the outer wall 21 toward the radially inner side (back surface side), whereby the elastic layer 3 is moved radially inward. Compressed.

The elastic layer 3 is compressed to, for example, 10 to 90% by volume, preferably 20 to 80% by volume with respect to the volume before press-fitting.
Further, since the first release film 8 has the above-described sliding property, the first release film 8 can slide in the front-rear direction with respect to the inner peripheral surface of the opening 22 of the outer wall 21. The elastic layer 3 is filled in the gap while being pressed radially inward by the peripheral surface.

In addition, the first uncovered portion 18 (free end) of the first release film 8 is slightly shifted to the front side (outside) of the duct 23 together with the press-fitting of the duct 23 described above.
As a result, the elastic layer 3 is filled in the gaps described above.
Next, as shown in FIG. 8, the elastic layer 3 is fixed to the inner peripheral surface of the opening 22 of the outer wall 21 (second fixing step).

In order to fix the elastic layer 3 to the inner peripheral surface of the opening 22 of the outer wall 21, as shown by the phantom line in FIG. 7, the first release film 8 is peeled off from the surface of the first adhesive portion 4, thereby The surface of the first adhesive portion 4 is bonded to the inner peripheral surface of the opening 22 of the outer wall 21.
In order to peel off the first release film 8 from the first adhesive portion 4, the first uncovered portion 18 (free end) of the first release film 8 is gripped, and the first release film 8 as shown by the arrow in FIG. The non-covering part 18 is pulled out to the outside (front side). That is, the first covering portion 17 of the first release film 8 is pulled out from between the first adhesive portion 4 and the inner peripheral surface of the opening portion 22 of the outer wall 21.

Therefore, the elastic layer 3 swells by the thickness of the portion where the first release film 8 is laminated (intervened), whereby the surface of the first adhesive portion 4 and the inner peripheral surface of the opening 22 of the outer wall 21. And contact. As a result, the first adhesive portion 4 is bonded to the inner peripheral surface of the opening 22 of the outer wall 21.
According to this sealing method, the elastic layer 3 is fixed to the outer peripheral surface of the duct 23 in the first fixing step, and the elastic layer 3 is fixed to the inner peripheral surface of the opening 22 of the outer wall 21 in the second fixing step. Therefore, the elastic layer 3 can reliably seal the gap between the opening 22 of the outer wall 21 and the duct 23.

In addition, it is possible to save the effort of curing the elastic layer 3 after press-fitting, and to seal the gap in a short time.
Moreover, since the elastic layer 3 has elasticity, even if the outer wall 21 vibrates, it can absorb this, so that excellent sealing properties can be ensured over a long period of time.
Further, in the second fixing step, the first release film 8 is peeled off from the first adhesive portion 4 so that the first adhesive portion 4 is adhered to the inner peripheral surface of the opening 22 of the outer wall 21, and thus a simple method. Thus, the elastic layer 3 can be fixed to the inner peripheral surface of the opening 22 of the outer wall 21.

Furthermore, since the duct 23 to which the elastic layer 3 is fixed is press-fitted into the opening 22 of the outer wall 21, the elastic layer 3 moves forward (outward) from the gap between the opening 22 of the outer wall 21 and the duct 23. Leakage can be effectively prevented. For this reason, it is possible to prevent the appearance of the outer wall 21 from being deteriorated.
As a result, in this sealing method, excellent sealing performance can be easily and quickly applied to the gap between the opening 22 of the outer wall 21 and the duct 23, and excellent sealing performance can be ensured over a long period of time. Moreover, the fall of the beauty | look of the outer wall 21 can be prevented.

Further, in this sealing method, in the first winding step, the second adhesive portion 5 is sequentially wound around the outer peripheral surface of the duct 23 from the one end portion 13 in the winding direction toward the other end portion 14 in the winding direction. 2 The adhesive part 5 can be smoothly and reliably bonded to the outer peripheral surface of the duct 23.
In the second winding step, the first adhesive portion 4 is sequentially wound around the surface of the elastic layer 3 from the one end portion 11 in the winding direction toward the other end portion 12 in the winding direction. It can be smoothly and reliably bonded to the surface of the elastic layer 3.

Therefore, the gap between the opening 22 of the outer wall 21 and the duct 23 can be more easily and reliably sealed.
In the above description, the winding direction of the second adhesive portion 5 in the first winding step (the clockwise direction around the duct 23) and the winding of the first adhesive portion 4 in the second winding step. Although the direction (clockwise direction around the duct 23) is the same direction, for example, as shown by the broken line in FIG. 4B and the broken line in FIG.

  More specifically, in the second winding step, the one end portion 11 in the winding direction of the first adhesive portion 4, the middle in the winding direction, and the other end portion 12 in the winding direction are sequentially connected to the other end in the winding direction of the elastic layer 3. It winds along the counterclockwise direction centering on the duct 23 on the surface of the part 14, the winding direction middle, and the winding direction one end part 13. As shown in FIG. In the second winding step, the first adhesive portion 4 is wound around the surface of the elastic layer 3 while peeling the first release film 8.

In that case, in the second fixing step, the third release film 10 as a release film laminated on the surface of the first adhesive portion 4 is used as the inner periphery of the opening portion 22 of the first adhesive portion 4 and the outer wall 21. Pull out from between the faces.
Preferably, the winding direction of the 1st winding process and the winding direction of the 2nd winding process are made into the same direction, and the 2nd adhesion part 5 and the 1st adhesion part 4 are wound, respectively.

According to this method, it is possible to smoothly shift from the first winding step to the second winding step.
In the above description, the connected adhesive portion 7 is partitioned in the adhesive layer 2. For example, the connected adhesive portion 7 is partitioned in the adhesive layer 2 as indicated by the phantom lines in FIGS. 1 and 2. The adhesive layer 2 can also be formed so as to divide between the first adhesive portion 4 and the second adhesive portion 5 without any problem.

In that case, as shown in FIG. 10, after the first winding step, both end surfaces of the elastic layer 3 in the winding direction are in contact with each other in the winding direction.
Preferably, the connection adhesive part 7 is partitioned in the adhesive layer 2.
If the connection adhesive part 7 is partitioned in the adhesive layer 2, the connection adhesive part 7 can be interposed between both end surfaces of the elastic layer 3 in the winding direction. It is possible to improve the sealing performance.

In the above description, the extending portion 6 is defined on the pressure-sensitive adhesive layer 2. For example, although not illustrated, the second pressure-sensitive adhesive is formed on the pressure-sensitive adhesive layer 2 without dividing the extending portion 6. The one end portion 11 in the winding direction of the portion 5 and the one end portion 15 in the winding direction of the elastic layer 3 can be arranged flush with each other in the longitudinal direction.
In that case, the elastic layer 3 is fixed to the outer peripheral surface of the duct 23 by the first adhesive portion 4 without being temporarily fixed to the outer peripheral surface of the duct 23.

Preferably, the extending part 6 is defined in the pressure-sensitive adhesive layer 2.
If the extending part 6 is partitioned in the pressure-sensitive adhesive layer 2, the elastic layer 3 can be temporarily fixed to the outer peripheral surface of the duct 23, so that the first winding step can be performed reliably.
Further, in the first winding step, the other end 14 in the winding direction of the second adhesive portion 5 can be overlapped with the extending portion 6, so that the elastic layer 3 is firmly bonded to the outer peripheral surface of the duct 23. can do.

In the above description, the sealing material 1 is provided with the second release film 9 and the third release film 10. For example, although not shown, the extension portion 6 is provided without providing them. The front surface and / or the back surface of the pressure-sensitive adhesive layer 2 can also be exposed.
FIG. 9 is a cross-sectional view of another embodiment of the sealing material of the present invention (a mode in which the first adhesive portion covers the elastic layer in advance), and FIG. 10 shows the elastic layer of the sealing material of FIG. 9 on the outer peripheral surface of the duct. FIG. 11 is a perspective view illustrating a step of press-fitting the duct into the opening of the outer wall, and FIG. 12 is a perspective view of fixing the elastic layer to the inner peripheral surface of the opening of the outer wall. The perspective view explaining a 2nd fixing process, FIG. 13 is sectional drawing of other embodiment (The aspect which inclines in the longitudinal direction other side as the longitudinal direction both end surfaces of an elastic layer go upwards), FIG. FIG. 14 is an enlarged cross-sectional view for explaining the first fixing step by the sealing material of FIG. 13, and FIG. 15 is another embodiment of the sealing material of the present invention (as both longitudinal end surfaces of the elastic layer are directed upward). FIG. 16 is a cross-sectional view of an aspect inclined to one side in the longitudinal direction), and FIG. It shows an enlarged cross-sectional view for explaining a first volume with steps with.

In addition, about the member corresponding to an above-described member, the same referential mark is attached | subjected in each subsequent drawing, and the detailed description is abbreviate | omitted.
In the sealing material 1 shown in FIGS. 1 and 2 described above, the first adhesive portion 4 is provided so as to be exposed from the elastic layer 3. For example, as shown in FIG. 9, the elastic layer 3 is previously covered. It can also be provided.

The sealing material 1 includes a third release film 10, a second adhesive portion 5 laminated on the entire surface, an elastic layer 3 laminated on the entire surface, a first adhesive portion 4 laminated on the entire surface, And the 1st release film 8 laminated | stacked on the whole surface and the longitudinal direction one end part (2nd non-coating part 18) is provided.
In order to seal the gap described above with the sealing material 1 shown in FIG. 9, first, as shown in FIG. 10, the third release film 10 is peeled off from the second adhesive portion 5, and the second adhesive portion 5 is removed from the duct 23. The elastic layer 3 is fixed to the outer peripheral surface of the duct 23 by bonding to the outer peripheral surface (first fixing step).

Next, as shown in FIG. 11, the duct 23 to which the elastic layer 3 is fixed is attached to the opening 22 of the outer wall 21 so that the first release film 8 is brought into close contact with the inner peripheral surface of the opening 22 of the outer wall 21. Press fit.
Next, as shown in FIG. 12, the first release film 8 is peeled off from the first adhesive portion 4 to adhere the first adhesive portion 4 to the inner peripheral surface of the opening 22 of the outer wall 21. Thereby, the elastic layer 3 is fixed to the inner peripheral surface of the opening 22 of the outer wall 21 (second fixing step).

Preferably, the first adhesive portion 4 is provided so as to be exposed from the elastic layer 3.
Thereby, the effort which laminates | stacks the 1st adhesion part 4 previously on the elastic layer 3 in a sealing material preparation process can be skipped. Therefore, the sealing material 1 can be prepared easily and the manufacturing cost of the sealing material 1 can be reduced.
In the description of FIG. 1 described above, the elastic layer 3 is formed such that both end surfaces in the longitudinal direction extend along the thickness direction (vertical direction). For example, as shown in FIG. Both end faces can also be formed in an inclined shape on the other side in the longitudinal direction as it goes upward.

In FIG. 13, the elastic layer 3 is formed in a parallelogram shape that inclines toward the other side (right side) in the longitudinal direction as it goes upward in a cross-sectional view along the longitudinal direction.
An angle R formed by both longitudinal end surfaces of the elastic layer 3 and the bottom surface of the elastic layer 3 (upper surface of the pressure-sensitive adhesive layer 2) is, for example, 30 to 60 degrees, and preferably 40 to 50 degrees.
When exceeding the above range, as will be described later, the length of the overlapping portion in the thickness direction (length in the winding direction) of both end surfaces of the elastic layer 3 in the winding direction cannot be sufficiently ensured. In some cases, it is not possible to effectively seal between the two end surfaces of the winding direction. Moreover, when it is less than the above-mentioned range, the thickness of both ends 15 and 16 in the longitudinal direction of the elastic layer 3 becomes excessively thin, and it may be impossible to effectively ensure good sealability and workability.

And in order to seal between the winding direction both ends of the elastic layer 3 with the sealing material 1 shown in FIG. 13, as shown in FIG. 14 (a) and FIG.14 (b), the elastic layer 3 of the sealing material 1 is used. Is fixed to the outer peripheral surface of the duct 23 (first fixing step).
That is, in the first winding step of the first fixing step, the winding direction ends 15 and 16 of the elastic layer 3 are wound in the winding direction so as to sandwich the connecting adhesive portion 7 as shown in FIG. And in the radial direction of the duct 23 (thickness direction of the elastic layer 3).

Further, the boundary between the connected adhesive portion 7 and the second adhesive portion 5 and the first adhesive portion 4 is bent at an obtuse angle, so that the connected adhesive portion 7 and the second adhesive portion 5 and the second adhesive portion in the vicinity thereof are bent. The one adhesive part 4 is formed in a substantially linear cross section.
Thereafter, as shown in FIG. 7, the elastic layer 3 is fixed to the inner peripheral surface of the opening 22 of the outer wall 21 (second fixing step).

And according to this sealing method, since the connection adhesion part 7 can be interposed between the winding direction both ends of the elastic layer 3 in both the winding direction and the radial direction, the winding of the elastic layer 3 can be performed. The sealing performance between both end surfaces in the direction can be improved.
Further, in the first winding step of the first fixing step, when tension in the winding direction is generated in the elastic layer 3, both ends 15 of the elastic layer 3 in the winding direction and the imaginary line in FIG. The 16 may be pulled away from each other, creating a gap between them.

However, in the sealing material 1 shown in FIG. 13, both end surfaces in the winding direction of the elastic layer 3 are formed to be inclined with respect to the thickness direction of the elastic layer 3. An overlapping portion in the thickness direction is formed along the winding direction.
Therefore, even if both ends 15 and 16 in the winding direction of the elastic layer 3 are somewhat separated from each other, overlapping portions in the thickness direction of both end faces in the winding direction of the elastic layer 3 can be secured. The sealing property can be ensured.

In the description of FIG. 13 described above, the elastic layer 3 is formed in an inclined shape in which both end surfaces in the longitudinal direction are inclined to the other side (right side) in the longitudinal direction as it goes upward. As shown, it can also be formed in an inclined shape that inclines toward one side (left side) in the longitudinal direction as it goes upward.
After the first winding step of the first fixing step using the sealing material 1 shown in FIG. 15, as shown in FIG. 16, the connection adhesive portion 7 laminated on the other end surface in the winding direction of the elastic layer 3 is elastic. Along the other end surface of the layer 3 in the winding direction, the layer 3 is inclined to one side in the winding direction as it goes upward.

Further, the boundary between the connected adhesive part 7 and the second adhesive part 5 and the first adhesive part 4 is bent at an acute angle, so that the connected adhesive part 7 and the second adhesive part 5 and the second adhesive part in the vicinity thereof are bent. The 1 adhesive part 4 is formed in a substantially Z-shaped cross section.
Preferably, as shown in FIG. 13, both end surfaces in the longitudinal direction of the elastic layer 3 are formed in an inclined shape that inclines toward the other side in the longitudinal direction as it goes upward.

  In the sealing material 1 of FIG. 13, after the first winding step of the first fixing step, as shown in FIG. 14A, the connection adhesive portion 7 laminated on the other end surface in the winding direction of the elastic layer 3 is Along the other end surface of the elastic layer 3 in the winding direction, the elastic layer 3 is inclined toward the other side in the winding direction as it goes upward. Therefore, the 1st adhesion part 4 is arrange | positioned at the winding direction other side. As a result, it is possible to make a smooth transition from the first winding process to the second winding process.

In the above description, the duct 23 is formed in a cylindrical shape. However, the shape is not limited and is not illustrated. For example, an elliptical cylindrical shape, for example, a triangular cylindrical shape, a rectangular cylindrical shape, a pentagonal cylindrical shape, etc. It can also be formed in a polygonal cylindrical shape.
Further, in the above description, the insertion member of the present invention is described as the hollow cylindrical duct 23, but although not shown, for example, a cylindrical filling member can be exemplified.

  If the filling member is used as the insertion member, the air flow between the inside and the outside of the building can be reliably blocked by the outer wall 21 and the filling member.

DESCRIPTION OF SYMBOLS 1 Sealing material 2 Adhesive layer 3 Elastic layer 4 1st adhesion part 5 2nd adhesion part 6 Extension part 7 Connection adhesion part 8 1st release film 10 3rd release film 11 One end part (longitudinal direction end) Part): 1st adhesion part 12 Winding direction other end part (longitudinal direction other end part): 1st adhesion part 13 Winding direction one end part (longitudinal direction one end part): 2nd adhesion part 14 Winding direction other end part (The other end in the longitudinal direction): second adhesive portion 21 outer wall 22 opening 23 duct

Claims (14)

A sealing method for sealing a gap between an opening passing through a thickness direction of an outer wall and an insertion member inserted into the opening,
An elastic layer;
A first adhesive portion laminated on a surface of the elastic layer;
A second adhesive portion laminated on the back surface of the elastic layer;
A sealing material preparation step of preparing a sealing material including a release film laminated on the surface of the first adhesive portion;
A first fixing step of fixing the elastic layer to the outer peripheral surface of the insertion member by bonding the second adhesive portion to the outer peripheral surface of the insertion member;
The insertion member to which the elastic layer is fixed is press-fitted into the opening of the outer wall so that the release film is brought into close contact with the inner peripheral surface of the opening. Filling a gap between the opening and the insertion member; and
The release film is peeled off from the first adhesive portion, and thereby the first adhesive portion is adhered to the inner peripheral surface of the opening portion of the outer wall, whereby the elastic layer is attached to the opening portion of the outer wall. A sealing method comprising a second fixing step of fixing to an inner peripheral surface. The first fixing step includes
A first winding step of winding the second adhesive portion around the outer peripheral surface of the insertion member; and
A second winding step of winding the first adhesive portion around the surface of the elastic layer;
In the first winding step, the second adhesive portion is sequentially wound around the outer peripheral surface of the insertion member from the one end in the winding direction along the outer peripheral surface of the insertion member toward the other end in the winding direction.
The said 2nd winding process WHEREIN: The said 1st adhesion part is wound around the surface of the said elastic layer sequentially as it goes to a winding direction other end part from a winding direction one end. Sealing method.   The winding direction of the second adhesive portion in the first winding step and the winding direction of the first adhesive portion in the second winding step are the same direction. The sealing method described in 1. In the sealing material preparation step,
Prepare the sealing material comprising an adhesive layer extending continuously in the longitudinal direction,
The pressure-sensitive adhesive layer is
The second adhesive portion that is pre-laminated on the back surface of the elastic layer and supported by the elastic layer;
The first adhesive part exposed from the elastic layer and connected to the second adhesive part;
A connecting adhesive portion that connects between the first adhesive portion and the second adhesive portion;
The first fixing step includes
The sealing method according to claim 2, further comprising a step of interposing the connecting adhesive portion between both end surfaces of the elastic layer in the winding direction after the first winding step. .   The sealing method according to claim 4, wherein both ends of the elastic layer in the winding direction are formed to be inclined with respect to the thickness direction of the elastic layer. The pressure-sensitive adhesive layer of the sealing material in the sealing material preparation step further includes an extending portion that extends from one end portion in the winding direction of the second adhesive portion toward one side in the winding direction and is exposed from the elastic layer,
The first fixing step includes
Before the first winding step, further comprising a step of temporarily fixing the elastic layer to the outer peripheral surface of the insertion member by bonding the extending portion to the outer peripheral surface of the insertion member;
6. The sealing method according to claim 4, wherein in the first winding step, the other end in the winding direction of the second adhesive portion is overlapped with the extending portion. A sealing material for sealing a gap between an opening passing through the thickness direction of the outer wall and an insertion member inserted into the opening,
An adhesive layer extending continuously in the longitudinal direction;
An elastic layer laminated on one side in the longitudinal direction of the surface of the pressure-sensitive adhesive layer;
A release film laminated on the other side in the longitudinal direction of the surface of the pressure-sensitive adhesive layer,
In the adhesive layer,
The portion where the elastic layer is laminated is partitioned as a second adhesive portion bonded to the outer peripheral surface of the insertion member,
The portion exposed from the elastic layer, connected to the second adhesive portion, and laminated with the release film is located on the inner peripheral surface of the opening of the outer wall when the release film is peeled off. A sealing material characterized in that it is partitioned as a first adhesive portion to be bonded.   The sealing material according to claim 7, wherein a portion connecting the first adhesive portion and the second adhesive portion is defined as a connection adhesive portion in the adhesive layer.   The sealing material according to claim 8, wherein both end faces in the longitudinal direction of the elastic layer are formed to be inclined with respect to the thickness direction of the elastic layer.   The portion of the adhesive layer that extends from one end in the longitudinal direction of the second adhesive portion toward the longitudinal direction and that is exposed from the elastic layer is defined as an extending portion. The sealing material in any one of 7-9. A sealing structure for sealing a gap between an opening that penetrates the thickness direction of the outer wall and an insertion member that is inserted into the opening,
An elastic layer;
A second adhesive portion laminated on the back surface of the elastic layer and bonded to the outer peripheral surface of the insertion member;
A sealing material comprising a first adhesive portion laminated on the surface of the elastic layer and bonded to the inner peripheral surface of the opening portion of the outer wall is formed in a gap between the opening portion of the outer wall and the insertion member. A sealing structure characterized by being filled. The sealing material comprises an adhesive layer that extends continuously in the longitudinal direction,
The pressure-sensitive adhesive layer is
The second adhesive portion for fixing the elastic layer to the outer peripheral surface of the insertion member by being wound around the outer peripheral surface of the insertion member;
The first adhesive part for fixing the elastic layer to the inner peripheral surface of the opening of the outer wall by being connected to the second adhesive part and wound around the surface of the elastic layer;
A connecting adhesive portion that connects between the first adhesive portion and the second adhesive portion;
The seal structure according to claim 11, wherein the connection adhesive portion is interposed between both end surfaces of the elastic layer in a winding direction.   The seal structure according to claim 12, wherein both ends of the elastic layer in the winding direction are formed to be inclined with respect to the thickness direction of the elastic layer. The pressure-sensitive adhesive layer includes an extending portion that extends from one end portion in the winding direction of the second adhesive portion toward one side in the winding direction and is exposed from the elastic layer,
The seal structure according to claim 12 or 13, wherein the extension part is overlapped with the other end part in the winding direction of the second adhesive part.

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