JP2015058895A - Seal material for cutoff and seal method using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal material for cutoff and a seal method capable of being peeled easily after being stuck, and being stuck again in a state that the seal material is an initial state.SOLUTION: Provided is a seal material 20 for cutoff which contacts a door inner panel 1 tightly and sticks a door hole seal 2, which is long, and which is used in a curved state. The seal material for cutoff comprises: a body part 21 formed of a vulcanized sponge rubber which is formed by extrusion, and which has flexibility and elastic restoration property enough to restore to its original shape when it receives external force and then the external force is removed; and an adhesive layer 22 formed by coating an adhesive agent on a surface of the body part 21. The adhesive agent on the door inner panel 1 side is filled in plural recess parts 23 formed on the body part 21, when the door hole seal 2 is stuck, the plural recess parts 23 are pressed and opened and the adhesive agent 22S in inside is adhered to the door inner panel 1, and the adhesive agent on the door hole seal 2 side is coated over substantially whole surface, and adhesive force of the adhesive layer 22B is larger than that of the adhesive layer 22A on the door inner panel 1 side.

Description

  The present invention relates to, for example, a water-stop sealing material for adhering a door hole seal (door hole cover) or a waterproof / sound-proof sheet that covers an opening on the inner side of a door inner panel of an automobile, and a seal material for the water stop The present invention relates to a sealing method using.

  As shown in FIG. 7, conventionally, a polyethylene door hole seal that covers an opening H used as a work hole formed in the door inner panel 1 on the inner side of the door inner panel 1 of the automobile door D ( A door hole cover) 2 and a waterproof / soundproof sheet are pasted with a sealing material 10 for waterproofing (see, for example, Patent Documents 1 and 2).

  As the sealing material 10 for water stop, for example, as shown in FIG. 8, there is a butyl sealant 11 of an adhesive wet and irregular soft rubber material. The butyl sealant 11 is attached in a ring shape along the positioning recess 1 a provided on the door inner panel 1 side, and then the outer peripheral end of the door hole seal 2 is overlapped on the butyl sealant 11. It is attached to the door inner panel 1.

Further, in the invention described in Patent Document 1, the waterproof / soundproof sheet is attached to the door inner panel via a transparent film provided on the outer peripheral end thereof, and the transparent film is attached to the door inner panel. It is affixed with a sealer (adhesive).
Further, in the invention described in Patent Document 2, a ribbon-like adhesive previously applied onto release paper is pressed against the edge or opening of the door hole cover and transferred from the release paper, and the door hole is moved to the door. The adhesive is attached to the inner panel, and as the pressure-sensitive adhesive, either a rubber-based, acrylic-based, or olefin-based hot-melt adhesive or a butyl rubber-based hot-melt adhesive is used.
In Patent Documents 1 and 2, the inner panel is not formed with a recess for positioning the adhesive.

  According to these, it is easy to attach a door hole seal (door hole cover) and a waterproof / soundproof sheet to the door inner panel, and the opening formed in the door inner panel is blocked by the attached door hole seal. In addition, an excellent waterproof and soundproofing effect can be obtained.

Japanese Patent No. 3890568 JP 2009-195834 A

  However, since the butyl sealant 11 shown in FIG. 8 is viscous and wet indeterminate, it is attached to the door inner panel 1 while being stretched in the sense of the operator, so that a skilled work is required and the number of installation steps is large. In addition, the butyl sealant 11 is difficult to peel once attached to the door inner panel 1, and even if it can be removed somehow, a part of the butyl sealant 11 remains on the door inner panel 1 side or the door hole seal 2 side. So you can't paste it again. Therefore, it is not possible to correct misalignment and the like, and it is necessary to complete the mounting in one shot. In addition, there is a concern that the butyl sealant 11 may accidentally adhere to the worker, and there is a problem that the butyl sealant 11 is leaked and cannot be attached in a stable state, particularly in the hot summer season. Furthermore, it is necessary to newly form a recess 11 a for positioning the butyl sealant 11 with respect to the door inner panel 1.

  The sealers and hot melt adhesives described in Patent Documents 1 and 2 are also difficult to remove once applied to the door inner panel or door hole seal side, and cannot be applied again after being removed.

  In addition, when the door hole seal is removed from the door inner panel after the door hole seal has been attached to the door inner panel, all of the water sealing material remains on either the door inner panel side or the door hole seal side. If it can be controlled, the efficiency of the mounting work will increase, and such a technique is desired.

Therefore, an object of the present invention is to provide a sealing material for water stop which can be easily peeled off even after being pasted once and can be stuck again in the same state as the beginning.
Also, to provide a sealing method using a water-stop sealing material in which all of the water-stop sealing material remains on the desired component side when the two parts are pasted through a water-stop sealing material and then peeled off. is there.

In order to achieve the above object, the sealing material for water stop according to the present invention is a long shape that adheres to the automotive panel (1) or the body and affixes the member (2) and is at least partially curved. A sealing material (20) for water stop used in a state,
Extruded and vulcanized rubber main body (21) having flexibility and elastic restoring force that restores the original shape when the external force is removed after applying the external force, and at least the main body (21) It consists of a pressure-sensitive adhesive layer (22) formed by applying a pressure-sensitive adhesive to the automotive panel (1) or body-side surface and the member (2) -side surface,
All or part of the pressure-sensitive adhesive on the vehicle panel (1) or the body side is formed by one or more recesses (23) formed on the surface of the body panel (21) on the vehicle panel (1) or the body side. ), And when the member (2) is adhered and adhered to the automobile panel (1) or the body side, the one or more recesses (23) are pushed open and the internal adhesive (22S ) Is partly strongly bonded to the surface of the automobile panel (1) or the body side,
The adhesive on the member (2) side is applied to substantially the entire surface on the member (2) side, and the adhesive force of the adhesive layer (22B) formed on the surface on the member (2) side is It is made larger than the adhesive force of the said adhesion layer (22A) formed in the said vehicle panel (1) or the body side surface of the said main-body part (21), It is characterized by the above-mentioned.

In the present invention, the main body (21) is made of a material having a specific gravity of 0.1 to 0.3, a tensile breaking strength of 3 to 10 N, and an elongation of 200 to 800%.
In the present invention, the main body (21) is made of EPDM sponge rubber.

  In the present invention, the member (2) is a sheet, and the adhesive layer (22B) formed on the surface of the main body (21) on the sheet (2) side is coated with a thick portion (22Ba). The thin portions (22Bb) are alternately provided in the width direction, and the sheet (2) is curved in a corrugated manner, and the thin portion (22Bb) is bonded in addition to the thick portion (22Ba). It is characterized by that.

  Furthermore, the sealing method using the sealing material (20) for water stop of this invention is the said water stop for peeling the said member (2) stuck and stuck to the said panel (1) or body for vehicles. The sealing material (20) is characterized in that it is peeled off at the automobile panel (1) or body side.

  Note that symbols in parentheses indicate corresponding elements or corresponding matters described in the drawings and modes for carrying out the invention described later.

According to the present invention, the adhesive layer is formed on the surface of the main body made of vulcanized rubber which has a long shape and has flexibility and elastic restoring force that can restore the original shape when the external force is removed after applying the external force. Forms a sealing material for water-stopping, and sticks the member in close contact with the automotive panel or body with the sealing material for water-stopping, so it can be pasted again or repeatedly is there.
Therefore, workability at the time of attachment is remarkably improved, and even a first-time operator can easily attach, for example, a member such as a door hole seal to an automobile panel or body.

  In addition, like the water-stop sealing material 10 according to the conventional example, the butyl sealant 11 is accidentally attached to the operator and cannot be removed, or the butyl sealant 11 is dripped particularly in the hot summer season and is attached in a stable state. There is no problem that you can't. Furthermore, it is not necessary to form the recess 11 a for positioning the butyl sealant 11 with respect to the door inner panel 1.

  Furthermore, by increasing the adhesive force of the adhesive layer formed on the surface to be affixed to the member side rather than the adhesive force of the adhesive layer formed on the surface to be affixed to the panel or body side for an automobile, the member is When the member is peeled off from the automobile panel or body after being attached to the vehicle panel or body side, it is possible to control so that all of the water sealing material remains on the member side.

  According to this, for example, when sticking a member as a door hole seal to a door inner panel via a sealing material for water stop, the adhesive force of the adhesive layer formed on the surface of the main body portion on the door hole seal side is adjusted to the door. When removing the door hole seal adhered to the door inner panel by making it larger than the adhesive strength of the adhesive layer formed on the inner panel side surface, the sealing material for water stop is the seal for water stop As the door hole seal with the material can be surely peeled off from the door inner panel side, the workability at the time of reattachment is greatly improved. Moreover, since the main body of the sealing material for waterproofing is made of vulcanized rubber having flexibility and elastic restoring force, it can return to the same state as before pasting even after peeling, and after installing the door hole seal This can be realized even if it is necessary to check or work inside the door hole.

  Further, a plurality of forms in which one surface (for example, the lower surface) of the water-stop sealing material is attached in a ring shape to the outer peripheral end of the upper surface of the polyethylene door hole seal can be stacked and conveyed. At this time, the other surface (for example, the upper surface) of the sealing material for water stop is in close contact with another door hole seal, which is desirable for protecting the adhesive surface. In addition, since there is a difference in adhesive strength, when mounting after transportation, the sealing material for water stop is surely removed from the other door hole seal and is in the same state (original state) as the first, so multiple sheets are stacked. The product is not deteriorated due to the conveyance.

Further, all or a part of the pressure-sensitive adhesive on the vehicle panel or body side is filled in a plurality of recesses formed on the surface of the body panel on the vehicle panel or body side, and the member is in close contact with the vehicle panel or body side. When affixed in such a manner, one or a plurality of concave portions of the flexible main body portion is deformed so as to be pushed open, whereby the internal adhesive is discharged to the surface side to the surface of the automobile panel or the body side, Since the adhesive is partially strongly bonded as compared with the surrounding area, the amount of the adhesive filled in the plurality of recesses can be easily adjusted. As a result, the surface of the vehicle panel or the body side can be adjusted. It becomes possible to easily adjust the adhesive force of the sealing material for water stop.
Here, “the entire panel or body-side adhesive” means that the automotive panel or body-side adhesive is all filled in a plurality of recesses, and “part” The term “remaining automotive panel or body-side pressure-sensitive adhesive” means that these are coated on the automotive panel or body-side surface excluding the recesses.

It is the AA line expanded sectional view of FIG. 7 which shows the sealing material for water stop which concerns on embodiment of this invention, (a) shows the state by which the adhesive was coated to the main-body part, (b) is a door. The state before the door hole seal is attached to the inner panel is shown, and (c) shows the state after being attached. It is the AA expanded sectional view of FIG. 7 which shows a mode that the doorhole seal attached with respect to the door inner panel using the sealing material for water stop which concerns on embodiment of this invention is peeled, (a). The state immediately before peeling is shown, and (b) shows the state in the middle of peeling. It is a perspective view which shows the sealing material for water stop to which the double-sided tape was attached. It is a perspective view which shows the outline of the 180 degree | times peeling test using the sealing material for water stop which concerns on embodiment of this invention. It is the AA line expanded sectional view of FIG. 7 which shows another sealing material for water stop which concerns on embodiment of this invention, (a) shows the state by which the adhesive was applied to the main-body part, (b) Shows a state before the door hole seal is attached to the door inner panel, and (c) shows a state after being attached. It is the AA expanded sectional view of FIG. 7 which shows another sealing material for water stop which concerns on embodiment of this invention. It is a side view which shows the vehicle inner side of the door of a motor vehicle. It is the AA line expanded sectional view of FIG. 7 which shows the sealing material for water stop concerning a prior art example, and shows the state after the door hole seal was attached with respect to the door inner panel.

With reference to FIG.1, FIG2 and FIG.7, the sealing material 20 for water stop which concerns on embodiment of this invention is demonstrated.
The sealing material 20 for water stop according to the embodiment of the present invention is used in a state of being long and at least partially curved to adhere a member in close contact with an automobile panel or body, Here, as shown in FIG. 7, an example in which the door hole seal 2 that covers the work opening H formed in the door inner panel 1 from the vehicle inner side is attached to the door inner panel 1 is used. Will be described.

This water sealing material 20 includes a vulcanized rubber main body 21 and an adhesive layer 22 formed by applying an adhesive to the surface of the main body 21.
The main body 21 is formed by extrusion molding with a substantially rectangular cross section, and an adhesive layer 22 (22A, 22B) is formed on one surface (upper surface) and the other surface (lower surface) on the long side. Thus, the adhesive force of the lower adhesive layer 22B attached to the door hole seal 2 side is made larger than the adhesive force of the upper adhesive layer 22A attached to the door inner panel 1 side.

The main body portion 21 is made of a material having flexibility and elastic restoring force to such an extent that when an external force is applied and then the external force is removed, the main body portion 21 is restored to its original shape. For rubber, a sponge body with many bubbles or a solid body without bubbles can be used.
Specifically, it is applicable to a material having a specific gravity of 0.01 to 1.5, a tensile breaking strength of 0.5 to 30 N, and an elongation of 150 to 1000%, and further a specific gravity of 0.1 to 0.3. A sponge-like material made of a material having a breaking strength of 3 to 10 N and an elongation of 200 to 800% is preferable. If the tensile breaking strength is 3N or less, the material may be broken at the time of peeling, and if the elongation is 200% or less, the followability (R followability) is inferior in a curved state, and if it is 800% or more, handling is difficult. . Further, if the specific gravity is less than 0.1, the base material is broken, and if the specific gravity is larger than 0.3, the R followability becomes difficult.

  The main body 21 is preferably vulcanized rubber. For example, it is preferably made of synthetic rubber such as EPDM sponge and particularly extruded and vulcanized. The extruded vulcanized EPDM sponge has a skin layer (thin surface layer without bubbles) on the surface thereof, so that the adhesive is hardly soaked into the bubbles forming the sponge and is applied to the surface of the skin layer. In addition, if unvulcanized sponge rubber is used for the main body 21, there is a risk of deformation due to the influence of heat or the like, and since the shape does not recover like the water sealing material 20 of the present embodiment, it is peeled off once. This is not preferable because it cannot be pasted again.

The pressure-sensitive adhesive layer 22 is formed on the main body 21 by applying a pressure-sensitive adhesive on the surface of the main body 21 with a brush or a roll, spraying it with a spray, or applying a die (shape die) by extrusion. A wide variety of methods are conceivable and not particularly limited.
Here, the string-like main body portion 21 formed by extrusion vulcanization is dipped into a pressure-sensitive adhesive tank (not shown) filled with a liquid pressure-sensitive adhesive to form the pressure-sensitive adhesive layer 22 on the entire circumference of the main body portion 21. The adhesive layer 22 formed on both the left and right side surfaces of the main body 21 is removed by passing the main body 21 through a scraping mold (not shown), and after air drying, the upper and lower surfaces of the main body 21 are removed. The adhesive layer 22 (22A, 22B) to be formed is manufactured by adjusting the coating thickness and the adhesion area. In addition, a plurality of (here, two) recesses 23 are formed on the surface of the main body 21 on the door inner panel 1 side during extrusion vulcanization molding, and a certain amount of adhesive is poured into the recesses 23. The amount of the adhesive in the recess 23 is adjusted by a groove provided also in the mold for scraping. The upper and lower surfaces of the main body 21 on which the adhesive layer 22 (22A, 22B) is formed are protected with release paper. In addition, you may leave as it is, without removing about the adhesion layer 22 formed in the left-right both sides | surfaces of the main-body part 21. FIG.

As shown in FIG. 1, the main body 21 of the sealing material 20 for water stop according to the present embodiment has a substantially rectangular cross section with a width of 6.0 mm and a thickness of 2.0 mm. Two recesses 23 are formed at an interval (2.0 mm). The width and depth of the recess 23 are both 0.5 mm, and the inside of the recess 23 is filled with an adhesive S having a film thickness (e) of 80 to 110 μm. Note that the adhesive is stripped on the upper surface of the main body portion 21 except for the adhesive S in the recess 23 and does not remain. In addition, an adhesive layer 22B having a film thickness (d) of 30 to 50 μm is formed on the entire lower surface (entire lower surface) on the lower surface of the main body 21.
When the door hole seal 2 is adhered and adhered to the door inner panel 1 side, the plurality of recesses 23 are pushed open so that the internal adhesive 22S partially adheres strongly to the surface on the door inner panel 1 side. It has become.
Thus, by making a difference in the adhesive area in the width direction between the two adhesive layers 22A and 22B, that is, as shown in FIG. 1C, the entire adhesive layer 22B (6.0 mm) is the door on the lower surface. The adhesive layer 22A formed by the adhesive S extruded by deformation of the recess 23 is locally contacted with the door inner panel 1 side at two locations, while being attached in contact with the hole seal 2 side. Thus, the adhesive force of the lower adhesive layer 22B attached to the door hole seal 2 side is greater than the adhesive force of the upper adhesive layer 22A attached to the door inner panel 1 side. It is getting bigger.

  The adhesive is not particularly limited as long as it is compatible with the EPDM rubber and the door inner panel 1 and the door hole seal 2. For example, a commonly used acrylic water-based adhesive can be used. Although water is preferred from the viewpoint of environmental pollution, it need not be water.

  Further, the door hole seal 2 is made of a polyethylene (PE) sheet, and a surface treatment is applied to the adhesion surface with the water sealing material 20 in order to improve adhesion. As the surface treatment method, corona discharge, plasma discharge treatment and primer coating can be applied. Here, corona discharge was performed.

The door hole seal 2 using the water-stop sealing material 20 is attached to the door hole which is first subjected to surface treatment by corona discharge after peeling off the release paper attached to the lower surface of the water-stop seal material 20. The lower surface of the sealing material 20 for water stop is pressed against the entire circumference of the outer peripheral end portion of the upper surface of the seal 2 and pasted.
At this time, it is necessary to stick the sealing material 20 for water stop at the corner portion of the door hole seal 2 in a stretched and curved state. Since 22 is not interrupted, the sealing material 20 for water stop can be affixed to the door hole seal 2 side in a stable state while ensuring sealing performance. In addition, it can be pasted by following various curvatures and bends up and down, left and right, and severe unevenness of the pasting surface.
In addition, as shown in FIG. 3, similarly to the main body portion 21 of the water-stop sealing material 20, the water stop formed by attaching a paper double-faced tape 32 to the surface of the main body portion 31 made of synthetic rubber such as EPDM sponge. It is conceivable to use the sealing material 30 for water stop, that is, the sealing material 30 for water stopping provided with the double-sided tape 32 in place of the adhesive layer 22, but when the sealing material 30 for water stopping is extended and bent, the double-sided tape 32 itself is Since it does not stretch, the double-sided tape 32 may be broken. Therefore, there exists a problem that sufficient sealing performance is not ensured.

Further, when the mounting position of the water sealing material 20 with respect to the door hole seal 2 deviates from the target position, the water sealing material 20 is partially removed from the door hole seal 2 and then corrected. It can be affixed, or it can be affixed again to the corrected position after the sealing material 20 for water-stopping is completely peeled off from the door hole seal 2.
At this time, the main body portion 21 of the sealing material 20 for water stop has a flexibility and an elastic restoring force that restores the original shape when the external force is lost after applying the external force, and the adhesive layer formed thereon 22 also follows the expansion and contraction of the main body 21, so that once it is peeled off from the door hole seal 2, the shape of the sealing material 20 for water stop is not lost, and it is pasted again or again in the same state as the beginning. be able to.

Next, the release paper affixed to the upper surface of the water-stop sealing material 20 affixed to the door hole seal 2 is peeled off, and the door hole seal 2 with the water-stop seal material 20 at a predetermined position of the door inner panel 1 is removed. To cover the opening H from the inside of the vehicle.
At this time, the door hole seal 2 with the water sealant 20 is strongly pressed against the door inner panel 1, thereby deforming the two recesses 23 formed in the main body 21 so as to open. Then, the internal pressure sensitive adhesive 22S is discharged and is strongly adhered to the surface of the door inner panel 1 partially.
Even when the water sealing material 20 is attached to the door inner panel 1, the shape of the water sealing material 20 does not lose its shape even if the water sealing material 20 is once peeled off from the door inner panel 1. Can be pasted again or again in the same state as the first. Therefore, even if a positional deviation occurs in the sticking of the water sealing material 20 to the door inner panel 1, it can be easily corrected.

Further, when the door hole seal 2 with the water sealant 20 attached to the door inner panel 1 is peeled off, as described above, the adhesive on the upper surface attached to the door inner panel 1 side by changing the bonding area. Since the adhesive force of the adhesive layer 22B on the lower surface attached to the door hole seal 2 side is larger than the adhesive force of the layer 22A, as shown in FIG. Peel off on one side.
Therefore, when a misalignment occurs in the attachment of the water sealing material 20 to the door inner panel 1 and correction is made, the door hole seal 2 with the water sealing material 20 must be reattached to the door inner panel 1 side. Thus, the door hole seal 2 can be returned to the same initial state as before the pasting without leaving the water sealing material 20 on the door inner panel 1 side, so that the correction is further facilitated.

Here, the result of having performed a 180 degree | times peeling test about the sealing material 20 for the still water of the size shown in FIG. 1 is shown. For the main body 21, a material (extruded vulcanized EPDM sponge rubber) having a specific gravity of 0.21, a tensile breaking strength of 6 to 8 N, and an elongation of 500% was used.
As shown in FIG. 4, a polyethylene (PE) sheet 200 subjected to corona discharge on the lower surface of the sealing material 20 for water stop, and a sheet metal 100 corresponding to a door panel on the upper surface by pressure bonding of 2 kgf, respectively. In addition, a sample No. 1 having a thickness (e) of the pressure-sensitive adhesive 22S filled in the recess 23 formed in the main body 21 of 80 to 110 μm is used. 1, sample No. 2 having a film thickness (e) of 150-170 μm and sample No. 2 having a film thickness (e) of 190-210 μm. Three and three types were provided. 24 hours after the pressure bonding, the polyethylene (PE) sheet 200 was peeled off from the sheet metal 100 at a rate of 200 mm / min in the direction of folding back 180 degrees. For sample 1, a force of 10 to 15 N / 25 mm is required. No. 2 requires a force of 16 to 20 N / 25 mm. No. 3 was peeled off with a force of 19 to 23 N / 25 mm. In all three types (sample No. 1, sample No. 2, sample No. 3), the sealing material 20 for water stop remained on the polyethylene (PE) sheet 200 side. It was also confirmed that the sponge rubber as the material was not destroyed and could be used again.

  In the present embodiment, the other surface (upper surface) of the water sealing material 20 with one surface (lower surface) attached to the door hole seal 2 is attached to the door inner panel 1 side. The door hole seal 2 can also be affixed to the water sealing material 20 that is affixed in advance to the door inner panel 1 side.

According to such a sealing material 20 for water stoppage, even if it is peeled off, it can be pasted again or again, so that the workability at the time of door maintenance is greatly improved, and even a first operator can easily open the door. The hole seal 2 can be attached.
Further, like the water-stop sealing material 10 according to the conventional example shown in FIG. 8, the butyl sealant 11 is accidentally attached to the worker and cannot be removed, or the butyl sealant 11 is dripped particularly in the hot summer season. There is no problem that it cannot be mounted in a stable state. Furthermore, it is not necessary to form the recess 11 a for positioning the butyl sealant 11 with respect to the door inner panel 1. Moreover, there is no after-remaining such as deposits remaining on the peeled surface after peeling.

  Further, by increasing the adhesive force of the lower adhesive layer 22B attached to the door hole seal 2 side as compared with the adhesive force of the upper adhesive layer 22A attached to the door inner panel 1 side, as shown in FIG. Moreover, since the door hole seal 2 with the water sealing material 20 can be completely peeled off from the door inner panel 1, the workability at the time of reattachment is significantly improved.

  Furthermore, all of the adhesive 22S on the door inner panel 1 side is filled in a plurality of recesses 23 formed on the door inner panel 1 side surface of the main body, and the door hole seal 2 is provided on the door inner panel 1 side. When being stuck and adhered, by deforming so that the plurality of recesses 23 are pushed open, the internal pressure-sensitive adhesive 22S is discharged to the front surface side, and on the surface on the door inner panel 1 side (door inner panel 1 The amount of the adhesive 22S filled in the concave portion 23 can be easily adjusted by adjusting the width and depth of the concave portion 23. As a result, it is possible to easily adjust the adhesive force of the water sealing material 20 to the surface on the door inner panel 1 side. Also, the adhesive force can be changed depending on the number of recesses 23.

  In addition, in this embodiment, it forms when the adhesive 22S is filled into the two recessed parts 23 formed in the upper surface of the main-body part 21, and the door hole seal 2 is stuck and affixed on the door inner panel 1 side. The door inner panel 1 is partially adhered to the adhesive layer 22A, and the door hole seal 2 is adhered to the adhesive layer 22B formed on the entire lower surface of the main body portion 21, so that the upper surface of the main body portion 21 is adhered. The adhesive area of the adhesive layer 22B formed on the lower surface of the main body portion 21 is made larger than the adhesive area of the adhesive layer 22A formed on the adhesive layer, but the adhesive strength of both adhesive layers 22A and 22B is not limited to this. In order to increase the adhesive strength of the adhesive layer 22B, there are various modes depending on the adhesive area and coating thickness of the adhesive layers 22A and 22B, the cross-sectional shape of the main body 21 or a combination thereof. It can be considered. For example, the number of the recesses 23 may be one.

For example, as shown in FIG. 5, by providing a plurality of uneven portions on the adhesive layer 22B formed on the lower surface of the main body portion 21, the main body portion is larger than the adhesion area of the adhesive layer 22A formed on the upper surface of the main body portion 21. The adhesion area of the pressure-sensitive adhesive layer 22B formed on the lower surface of 21 can also be increased.
This is because the upper surface of the main body 21 is filled with an adhesive S having a film thickness (f) of 80 to 110 μm inside the recess 23, and the film thickness (g) is 10 μm or less on the flat surface. The adhesive layer 22A is applied to the entire surface, and the lower surface thereof is provided with three protrusions having a thickness (h) of 100 to 120 μm and a width of 1.1 mm to form a thick portion 22Ba, A concave portion having a film thickness (i) of 10 μm or less and a width of 1.1 mm is provided between adjacent convex portions to form a thin portion 22Bb, and the main body portion 21 and the door hole seal 2 are deformed to form a concave portion during crimping. By bonding the door hole seal 2 to the thin portion 22Bb, the adhesive area of the adhesive layer 22B formed on the lower surface of the main body 21 is made larger than the adhesive area of the adhesive layer 22A on the upper surface. Thus, the adhesion area can be increased by adjusting the interval between the recesses and adhering the door hole seal 2 in a wave shape using the flexibility of the main body 21. Also, the adhesive strength can be further improved by providing a portion 22Ba thicker than the thickness of the adhesive layer 22A on the adhesive layer 22B on the lower surface. The shape of the main body portion 21 is such that a portion projecting in a triangular shape in cross section is formed on the left and right as compared with the case of FIG. The pressing force of the water sealing material 20 against the door inner panel 1 can be grasped by the degree of deformation of the portion projecting in a triangular shape on the left and right.
Also in this case, the 180 degree peel test as shown in FIG. 4 was performed with three types (similar to sample No. 1, sample No. 2, and sample No. 3). All 20 remained on the polyethylene (PE) sheet 200 side.

Further, as shown in FIG. 6, the cross-sectional shape of the main body 21 is made trapezoidal so that the adhesive area in the width direction of the adhesive layer 22 </ b> A attached to the door inner panel 1 side is attached to the door hole seal 2 side. By further increasing the adhesive area in the width direction of the adhesive layer 22B to be applied, the adhesive force on the door hole seal 2 side can be increased.
Also in this case, the 180 degree peel test as shown in FIG. 4 was performed with three types (similar to sample No. 1, sample No. 2, and sample No. 3). All 20 remained on the polyethylene (PE) sheet 200 side.
Here, the pressure-sensitive adhesive layer 22A is not formed at all on the flat surface of the upper surface of the main body 21, but may be formed other than the recess 23 as shown in FIG. In addition, thick portions 22Ba and thin portions 22Bb having a coating thickness are alternately provided in the width direction on the lower surface of the main body portion 21, and the door hole seal 2 is curved in a corrugated shape corresponding thereto, so that it is thin in addition to the thick portions 22Ba. Although the portion 22Bb is also adhered, an adhesive layer 22B having a uniform width may be formed on the entire lower surface as shown in FIG.

In the embodiment of the present invention, the aspect of sticking the door hole seal 2 to the door inner panel 1 using the sealing material 20 for water stop has been described. However, when a sound insulating sheet other than the door hole seal 2 is attached, The water-stop sealing material 20 can also be used when attaching other automobile parts in close contact with the automobile panel or body.
Moreover, it can also be applied to things other than those related to automobiles, such as industrial material parts (architecture / civil engineering relations), and other parts. Two parts such as a housing outer wall and a steel frame unit are sealed with a sealing material 20 for water stoppage. It can be attached or pasted via.

DESCRIPTION OF SYMBOLS 1 Door inner panel 1a Concave part 2 Door hole seal 10 Sealing material for water stop 11 Butyl sealant 20 Sealing material for water stop 21 Main body part 22 Adhesive layer 22A Adhesive layer on the upper surface 22B Adhesive layer on the lower surface 22Ba Thick part in the adhesive layer on the lower surface 22Bb Thin portion in the adhesive layer on the lower surface 22S Adhesive inside the recess 23 Recess 30 Sealing material 31 Main body 32 Double-sided tape 100 Sheet metal 200 Polyethylene (PE) sheet

Claims (5)

It is a sealing material for water stop used in a long and at least partly curved state in which a member is adhered in close contact with an automobile panel or body,
Extruded vulcanized rubber main body having flexibility and elastic restoring force that restores the original shape when the external force is removed after applying the external force, and at least the automobile panel or body side of the main body It consists of an adhesive layer formed by applying an adhesive to the surface and the member side surface,
All or part of the pressure-sensitive adhesive on the vehicle panel or body side is filled in one or a plurality of recesses formed on the surface of the body panel on the vehicle panel or body side, and the vehicle panel or body side When the member is attached in close contact, the one or more recesses are pushed open, and the internal adhesive partially adheres strongly to the surface of the automobile panel or body,
The pressure-sensitive adhesive on the member side is applied to substantially the entire surface on the member side, and the pressure-sensitive adhesive force of the pressure-sensitive adhesive layer formed on the surface on the member side is set on the panel or body side of the body portion. A sealing material for water stop, which is made larger than the adhesive force of the adhesive layer formed on the surface.   The said main-body part consists of a raw material of specific gravity 0.1-0.3, tensile breaking strength 3-10N, and elongation 200-800%, The sealing material for water stop of Claim 1 characterized by the above-mentioned.   The sealing material for water stop according to claim 1, wherein the main body portion is made of EPDM sponge rubber. The member is a sheet;
In the adhesive layer formed on the sheet side surface of the main body portion, thick portions and thin portions with coating thickness are alternately provided in the width direction, and the sheet is curved in a corrugated shape corresponding thereto, so that the thick portion The sealing material for water stop according to any one of claims 1 to 3, wherein the thin portion is bonded in addition to the above. A sealing method using a sealing material for water stop according to any one of claims 1 to 4,
The water-stop sealing material is characterized in that when the member attached in close contact with the automobile panel or body is peeled off, the water-stop sealing material is peeled off at the vehicle panel or body side. Sealing method using.