JP2018080521A - Sealant between panels and seal structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a configuration including a hydrophobic urethane foam material and a water-absorbing swelling foam resin material which makes it possible to prevent a panel breakage due to water absorption freezing while improving airtight performance and watertight performance.SOLUTION: In an exterior wall joint material 10, a hydrophobic urethane foam material 14 and a water-absorbing swelling urethane foam material 16 are laminated in a panel thickness direction T in a joint 26 between exterior wall panels 22 and 24, so that there is no portion formed only of the hydrophobic urethane foam material 14 in the panel thickness direction T. This makes it possible to improve an airtight performance and a watertight performance compared to the case where there is the portion. Besides, since the water-absorbing swelling urethane foam material 16 is supported by the hydrophobic urethane foam material 14 in the panel thickness direction T, it is possible to reduce the dimension of the water-absorbing swelling urethane foam material 16 in the panel thickness direction T. Accordingly, it is possible to facilitate the deformation of the water-absorbing swelling urethane foam material 16 at the time of water absorption freezing, and reduce the pressure exerted on the exterior wall panels 22 and 24.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a dry sealing material and a sealing structure for sealing a gap between panels.

  Patent Document 1 below discloses a dry-type sealing material (outer wall joint material) that seals joints of an outer wall panel of a building. The outer wall joint material is disposed on the back side of the wet seal material which is the primary seal material in the joint, and is used as a secondary seal material. The outer wall joint material includes a hydrophobic urethane foam material and a water-swellable foamed resin material laminated in the direction in which the outer wall panels are adjacent to each other, and is disposed in the joint in a state compressed in the lamination direction. It is the composition which becomes. In this outer wall joint material, the water-swellable foamed resin material absorbs water and swells to improve the water tightness of the joint. Moreover, when the water-absorbing swellable foamed resin material is water-absorbed and frozen, the pressure applied to the outer wall panel is reduced due to the deformation of the hydrophobic urethane foam material, which can prevent the outer wall panel from being damaged due to the water-absorbing freeze. it can.

Japanese Patent No. 5466074

  However, the outer wall joint material having the above-described configuration is intended for a building having 5 to 10 floors and is not suitable for a high-rise building having more than 10 floors. That is, since a high wind pressure is applied to an outer wall joint material used for a high-rise building exceeding 10 stories, an airtight performance and a watertight performance of about 3500 Pa are required. In this respect, in the outer wall joint material having the above-described configuration, the hydrophobic urethane foam material and the water-swellable foamed resin material are laminated in the direction in which the outer wall panels are adjacent to each other. There is a part consisting of only. Since this hydrophobic urethane foam material has lower airtight performance and watertight performance limit values than the water-absorbing swellable foamed resin material, it is difficult to satisfy the above requirements. For this reason, the outer wall joint material having the above configuration has room for improvement from the viewpoint of improving the airtight performance and the watertight performance.

  In consideration of the above facts, the present invention is a panel that includes a hydrophobic urethane foam material and a water-absorbing swelling resin material, and can prevent damage to the panel due to water absorption while improving airtightness and watertightness. An object is to obtain a sealing material and a sealing structure.

  The inter-panel sealing material according to the first aspect of the present invention is disposed in a gap formed between adjacent panels in a direction orthogonal to the thickness direction and compressed in the orthogonal direction. Is a dry-type sealing material that includes a hydrophobic urethane foam and a water-swellable foamed resin material laminated in the thickness direction.

  The sealing material between panels of Claim 1 is arrange | positioned in the state compressed in the said orthogonal direction in the clearance gap formed between the panels adjacent in the direction orthogonal to the thickness direction. In this sealing material, a hydrophobic urethane foam material and a water-absorbing swelling resin material are laminated in the thickness direction of the panel. Thereby, since the part which consists only of a hydrophobic urethane foam material can be made not to exist in the thickness direction of a panel, airtight performance and watertight performance can be improved. Moreover, since the water-absorbing swellable foamed resin material is supported by the hydrophobic urethane foam material in the thickness direction of the panel, the size (thickness) of the water-absorbing swellable foamed resin material in the panel thickness direction is reduced (thinned). )be able to. Thereby, since the deformation | transformation at the time of water absorption freezing of a water absorption swelling foaming resin material can be accelerated | stimulated and the pressure added to a panel can be reduced, it becomes possible to prevent the damage of the panel by water absorption freezing.

  A sealing material between panels according to a second aspect of the present invention is the sealing material between panels according to the first aspect, wherein the non-compressed water-absorbing swellable foamed resin material has a dimension in the orthogonal direction when the dimension in the thickness direction is 1. The dimension is set to 1 or more.

  Since the sealing material between panels of Claim 2 is comprised as mentioned above, the deformation | transformation at the time of water absorption freezing of a water absorption swelling foamed resin material can be accelerated | stimulated effectively.

  A sealing material between panels according to a third aspect of the present invention is the sealing material between panels according to the first or second aspect, wherein the one side surface in the orthogonal direction in the hydrophobic urethane foam material and the water-absorbing swellable foamed resin material is the one side side. The positional deviation in the thickness direction with respect to the one is regulated by the positional deviation regulating means provided on one of the surfaces or the adjacent panels.

  In the sealing material between panels of Claim 3, the positional shift of the hydrophobic urethane foam material and the water-swellable foamed resin material in the thickness direction with respect to one of the adjacent panels is regulated by the positional deviation regulating means. The As a result, the hydrophobic urethane foam material and the water-swellable foamed resin material are displaced in the thickness direction with respect to the one panel by deformation due to water-absorption freezing of the water-swellable foamed resin material and restoration by freeze-thawing. Can be prevented.

  A sealing material between panels according to a fourth aspect of the present invention is the sealing material between panels according to any one of the first to third aspects, and a plurality of hydrophobic urethane foam materials arranged in the thickness direction and a plurality of hydrophobic properties. One or a plurality of water-swellable foaming resin materials disposed between urethane foam materials.

  In the sealing material between panels according to claim 4, since one or a plurality of water-swellable foamed resin materials are supported from both sides in the thickness direction of the panel by a plurality of hydrophobic urethane foam materials, this sealing material is adjacent. The water-absorbing swellable foamed resin material is unlikely to fall down in the thickness direction of the panel at the time of construction that is disposed in the gap between the matching panels or when the water-absorbing swellable foamed resin material is frozen.

  A sealing material between panels according to a fifth aspect of the present invention is the sealing material according to any one of the first to fourth aspects, wherein the hydrophobic urethane foam material and the water-absorbing swellable foamed resin material are joined together, and the hydrophobic material is hydrophobic. It has an adhesive layer that is lower in air permeability and higher in water stopping performance than urethane foam and water-swellable foamed resin material.

  In the sealing material between panels according to claim 5, since the adhesive layer is interposed between the hydrophobic urethane foam and the water-swellable foamed resin material laminated in the thickness direction of the panel, the adhesion The airtight performance and watertight performance can be further improved by the layer.

  The sealing material between panels which concerns on invention of Claim 6 has Claim 5 in which the said contact bonding layer has a base material which consists of resin films.

  In the sealing material between panels of Claim 6, since the contact bonding layer which concerns on Claim 5 has a base material which consists of resin films, airtight performance and watertight performance can be improved further.

  The sealing material between panels which concerns on invention of Claim 7 is the hydrophobic urethane foam material and water-absorbing swelling foamed resin material laminated | stacked in the lamination direction orthogonal to each longitudinal direction, hydrophobic urethane foam material, and water absorption The swellable foamed resin material includes a double-sided pressure-sensitive adhesive tape bonded to one surface in the direction perpendicular to the longitudinal direction and the laminating direction.

  The sealing material between panels of Claim 7 is arrange | positioned in the state compressed in the said orthogonal direction in the clearance gap formed between the panels adjacent in the direction orthogonal to the thickness direction, for example. In this sealing material, the laminating direction of the hydrophobic urethane foam material and the water-absorbing swellable foamed resin material is the thickness direction of the panel, and the foam material and the resin material can be joined to one panel by a double-sided adhesive tape. . Thereby, since the part which consists only of a hydrophobic urethane foam material can be made not to exist in the thickness direction of a panel, airtight performance and watertight performance can be improved. Moreover, since the water-absorbing swellable foamed resin material is supported by the hydrophobic urethane foam material, the dimension (thickness) of the water-absorbing swellable foamed resin material in the thickness direction of the panel can be reduced. Thereby, since the deformation | transformation at the time of water absorption freezing of a water absorption swelling resin material can be accelerated | stimulated and the pressure added to a panel can be reduced, it becomes possible to prevent the failure | damage of the panel by water absorption freezing. Moreover, the position shift of the hydrophobic urethane foam material and the water-absorbing swellable foamed resin material with respect to one panel is regulated by the double-sided adhesive tape. Thereby, it is possible to prevent the hydrophobic urethane foam material and the water-absorbing swellable foamed resin material from being displaced with respect to one panel due to deformation due to water absorption freezing of the water-absorbable swellable foamed resin material and restoration by freeze-thawing.

  The seal structure according to the invention described in claim 8 is a dry type in which a gap formed between adjacent panels in a direction orthogonal to the thickness direction is disposed in the gap in a state compressed in the orthogonal direction. The sealing material is configured to include a hydrophobic urethane foam and a water-swellable foamed resin material laminated in the thickness direction.

  9. The seal structure according to claim 8, wherein a gap formed between adjacent panels in a direction orthogonal to the thickness direction is disposed in the gap in a compressed state in the orthogonal direction. Sealed by. In this sealing material, a hydrophobic urethane foam material and a water-absorbing swelling resin material are laminated in the thickness direction of the panel. Thereby, since the part which consists only of a hydrophobic urethane foam material can be made not to exist in the thickness direction of a panel, airtight performance and watertight performance can be improved. Moreover, since the water-absorbing swellable foamed resin material is supported by the hydrophobic urethane foam material in the thickness direction of the panel, the size (thickness) of the water-absorbing swellable foamed resin material in the panel thickness direction is reduced (thinned). )be able to. Thereby, since the deformation | transformation at the time of water absorption freezing of a water absorption swelling resin material can be accelerated | stimulated and the pressure added to a panel can be reduced, it becomes possible to prevent the failure | damage of the panel by water absorption freezing.

  The seal structure according to the ninth aspect of the invention is the seal structure according to the eighth aspect, wherein the seal member regulates displacement of the seal material in the thickness direction with respect to one of the adjacent panels. Has regulation means.

  In the seal structure according to the ninth aspect, the positional deviation of the sealing material in the thickness direction with respect to one of the adjacent panels is regulated by the positional deviation regulating means. Thereby, it is possible to prevent the sealing material from being displaced in the thickness direction with respect to the one panel due to deformation due to water absorption freezing of the water-absorbing swellable foamed resin material and restoration due to freezing and thawing.

  As described above, in the inter-panel seal material and inter-panel seal structure according to the present invention, in the configuration including the hydrophobic urethane foam material and the water-absorbing swellable foam resin material, while improving the air tight performance and the water tight performance, It is possible to prevent panel breakage due to water absorption freezing.

It is a perspective view which shows the structure of the outer wall joint material which concerns on 1st Embodiment of this invention. (A) is sectional drawing of the outer wall joint material which concerns on 1st Embodiment, (B) is sectional drawing which shows the state by which the outer wall joint material which concerns on 1st Embodiment was compressed within the joint of an outer wall panel. It is sectional drawing corresponding to FIG.2 (B) which shows the modification of a position shift control means. It is a perspective view of the jig | tool used for the airtightness evaluation test. It is a perspective view of the jig | tool used for the water-tightness evaluation test. It is a perspective view which shows the structure of the outer wall joint material which concerns on 2nd Embodiment of this invention. (A) is sectional drawing of the outer wall joint material which concerns on 2nd Embodiment, (B) is sectional drawing which shows the state by which the outer wall joint material which concerns on 2nd Embodiment was compressed within the joint of an outer wall panel. It is a perspective view which shows the structure of the outer wall joint material which concerns on 3rd Embodiment of this invention. (A) is sectional drawing of the outer wall joint material which concerns on 3rd Embodiment, (B) is sectional drawing which shows the state by which the outer wall joint material which concerns on 3rd Embodiment was compressed within the joint of an outer wall panel. It is a perspective view which shows the structure of the outer wall joint material which concerns on a comparative example. (A) is sectional drawing of the outer wall joint material which concerns on a comparative example, (B) is sectional drawing which shows the state by which the outer wall joint material which concerns on the comparative example was compressed within the joint of an outer wall panel.

<First Embodiment>
Hereinafter, an outer wall joint material 10 as a seal material between panels according to the first embodiment of the present invention and an outer wall joint structure 12 (sealing) configured by applying the outer wall joint material 10 will be described with reference to FIGS. Structure) will be described.

  The outer wall joint material 10 according to the present embodiment is a joint material of an outer wall panel (for example, an outer wall material such as an extrusion-molded cement panel) used as an outer wall of a building, particularly a building wall such as a curtain wall. It is a joint material used as a secondary sealing material that is not exposed to the outer wall surface. In addition, an application object is a high-rise building of 10 stories or more.

  As shown in FIG. 1 and FIG. 2 (A), the outer wall joint material 10 has a hydrophobic urethane foam material 14 and a water-swelling urethane foam material (water-swelling foamed resin material) 16 laminated in two layers. It has a structure. The hydrophobic urethane foam material 14 and the water-absorbing swelling urethane foam material 16 are bonded and integrated by a film base double-sided adhesive tape 18 as an adhesive layer. As shown in FIG. 2B, the outer wall joint material 10 is configured to be disposed in a compressed state in a joint (gap) 26 formed between adjacent outer wall panels 22 and 26. . In FIGS. 1 and 2, arrow A indicates the stacking direction of the hydrophobic urethane foam 14 and the water-swellable urethane foam 16, and arrow C indicates the hydrophobic urethane foam 14 and the water-swellable urethane. The longitudinal direction of the foam material 16 is shown. 1 and 2, an arrow B indicates a direction orthogonal to the stacking direction A and the longitudinal direction C. Hereinafter, for convenience, the orthogonal direction B is referred to as a “height direction B”.

  Examples of the water-absorbing swellable foamed resin material in the present invention include a resin material formed by foaming a resin base material obtained by mixing and dispersing a water-absorbing swellable resin. There is no restriction | limiting in particular in a resin base material, When it makes it a foaming material, what has sufficient intensity | strength and restoring force as a joint material can be selected suitably, and can be used. Examples of such resin base materials include acrylic rubber, butyl rubber, silicon rubber, urethane rubber, butadiene rubber, isoprene rubber, chloroprene rubber, polybutene rubber, acrylate-butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, and acrylonitrile. -Synthetic rubber such as butadiene-styrene rubber, styrene-isoprene rubber, acrylonitrile-chloroprene rubber, styrene-chloroprene rubber, butadiene-styrene block copolymer, styrene-butadiene-styrene copolymer; styrene-butadiene-styrene copolymer Styrene thermoplastic elastomers such as styrene-isoprene-styrene copolymer, styrene-hydrogenated polyolefin-styrene copolymer, ethylene-vinyl acetate copolymer, Esters, synthetic resin such as polyurethane. Among these, polyurethane is preferable in terms of durability and good adhesion to the hydrophobic urethane foam material 14 used in combination. Hereinafter, the case where a water-swellable urethane foam material using urethane as a resin base material is used will be specifically described as an example, but the present invention is not limited thereto.

  Examples of the water-swellable urethane constituting the water-swellable urethane foam 16 which is the optimum water-swellable foamed resin material in the present invention include urethane resins obtained by mixing and dispersing a water-swellable resin in a urethane resin material. It is done. The water-absorbing swellable resins include polyacrylate, polysulfonate, maleate anhydride, polyacrylamide, polyvinyl alcohol, polyethylene oxide, polyamine, polyaspartate, polyglutamate, Examples include alginate-based, starch-based, cellulose-based polyglycol-based, and the like. From the viewpoint of water absorption swellability and stability over time, an acrylic water-absorbing resin is preferable, and for example, crosslinked polyacrylic acid is preferable. Examples of the urethane resin serving as the base material include polyether-based polyurethane resins. A water-absorbing swellable urethane foam 16 is obtained by blending a urethane resin as a base material with a water-absorbing swellable resin and then performing foam molding. The water-absorbing swellable urethane foam 16 used in the present embodiment preferably satisfies the performance shown in Table 1 below.

  The water-absorbing swellable urethane foam 16 used in the present embodiment is also available as a commercial product, and examples thereof include “Insulon” manufactured by Nippon Hojo Co., Ltd.

  On the other hand, it is preferable that the hydrophobic urethane foam material 14 has a water repellent function, exhibits a stable water-stopping property even at low compression, and has both flexibility and resilience. Further, as the hydrophobic urethane foam material 14, a material having a water stoppage of 50 mm or more is preferable from the viewpoint of preventing rainwater and the like from penetrating into the joint. The size and density of bubbles in the foam material can be arbitrarily selected according to the purpose, but the hydrophobic urethane foam material 14 used in the present embodiment preferably satisfies the performance shown in Table 2 below.

  The hydrophobic urethane foam 14 used in the present embodiment is also available as a commercial product, and examples thereof include “Super Sheet HPU (hydrophobic foamed urethane-based sealing material)” manufactured by Nippon Hojo Co., Ltd.

  In the present embodiment, the outer wall joint material 10 having a two-layer structure is formed by laminating the hydrophobic urethane foam 14 and the water-swellable urethane foam 16 as described above. As a joining means for joining the two layers, a double-sided pressure-sensitive adhesive tape, or an adhesive that can adhere a urethane resin, a pressure-sensitive adhesive, or the like is used as appropriate, but it is more than the hydrophobic urethane foam 14 and the water-swellable urethane foam 16. Those that form an adhesive layer with low air permeability and high water blocking properties are preferred. In particular, it is preferable to use a film base double-sided pressure-sensitive adhesive tape 18 having a base made of a resin film. As a material for the film substrate of the film substrate double-sided pressure-sensitive adhesive tape 18, polyethylene terephthalate, polyethylene, polypropylene, acrylic, or the like is preferable. In addition, the film base of the film base double-sided adhesive tape 18 has a small thickness or flexibility so that the outer wall joint material 10 can be compressed in a direction orthogonal to the thickness direction of the film base. What has is preferable.

  The dimensions (thicknesses) in the stacking direction A and the height direction B of the outer wall joint material 10 are appropriately selected according to the purpose of use, but the water-absorbing swellable urethane foam 16 is an uncompressed state of the outer wall joint material 10. It is preferable to set the dimension b in the height direction B larger than the dimension a in the stacking direction A. Specifically, in the ratio between the dimension a and the dimension b, when the dimension a is 1, it is preferable that the dimension b is 1 or more. In the present embodiment, in the non-compressed state of the outer wall joint material 10, when the ratio of the dimension a and the dimension b is 1, the dimension b is set to 1.6 or more.

  In the hydrophobic urethane foam material 14 and the water-absorbing swellable urethane foam material 16, one surface in the height direction B (one surface of a pair of surfaces facing the height direction B; FIG. 1, FIG. 2 (A) and The lower surface in FIG. 2B is an adhesive surface to the outer wall panel, and a double-sided adhesive tape 20 is attached to the adhesive surface as a positional deviation regulating means. As this double-sided pressure-sensitive adhesive tape 20, one using a butyl rubber-based pressure-sensitive adhesive is preferable.

  As described above, the outer wall joint material 10 having the above configuration is arranged in a compressed state in a joint 26 (see FIG. 2B) formed between adjacent outer wall panels 22 and 24. It has become. The outer wall panels 22 and 24 are adjacent to each other in a direction S orthogonal to the thickness direction T of the outer wall panels 22 and 24. Hereinafter, the thickness direction T of the outer wall panels 22 and 24 is referred to as “panel thickness direction T”, and the orthogonal direction S is referred to as “panel adjacent direction S”. When the outer wall joint material 10 is disposed in the joint 26, before the outer wall panels 22 and 24 are attached to a building (not shown), the front end surface of the protrusion 24A formed on one outer wall panel 24 (the joint edge) The outer wall joint material 10 is bonded to the surface) by the double-sided adhesive tape 20. Thereafter, by attaching the outer wall panels 22 and 24 to the building, the outer wall joint material 10 is inserted into the groove 22 </ b> A formed in the other outer wall panel 22, and the outer wall joint material 10 is disposed in the joint 26.

  Thus, in the state where the outer wall joint material 10 is disposed in the joint 26, the panel thickness direction T of the outer wall panels 22, 24 and the stacking direction A of the hydrophobic urethane foam material 14 and the water-swellable urethane foam material 16 And the panel adjacent direction S of the outer wall panels 22 and 24 and the height direction B of the hydrophobic urethane foam material 14 and the water-swellable urethane foam material 16 are configured to coincide with each other. Further, in this state, the hydrophobic urethane foam material 14 and the water-absorbing swelling urethane foam material 16 are compressed in the height direction B. Thereby, the inside of the joint 26 is sealed by the outer wall joint material 10. The compression rate of the outer wall joint material 10 is, for example, in the range of 30% to 40%. In the compressed state of the outer wall joint material 10, when the dimension a ′ in the panel thickness direction T is 1, the dimension b ′ in the panel adjacent direction S is 0.96 or more. It is configured. Further, in this state, the double-sided pressure-sensitive adhesive tape 20 is configured to regulate the displacement of the hydrophobic urethane foam material 14 and the water-swellable urethane foam material 16 with respect to the outer wall panel 24.

  In this embodiment, the hydrophobic urethane foam material 14 and the water-absorbing swellable urethane foam material 16 are configured to be joined to one outer wall panel 24 by the double-sided adhesive tape 20 as a positional deviation regulating means. Not limited to this, the hydrophobic urethane foam material 14 and the water-absorbing swellable urethane foam material 16 may be configured to be joined to one of the outer wall panels 24 with an adhesive serving as a positional deviation restricting means. Further, as shown in FIG. 3, a configuration may be adopted in which a positional deviation regulating groove 24 </ b> B formed in one outer wall panel 24 is used as a positional deviation regulating means. The groove 24B extends in the longitudinal direction of the joint 26 (the direction perpendicular to the paper surface in FIG. 2B), and a part of the outer wall joint material 10 is fitted in the positional deviation restricting groove 24B. Even in this configuration, it is possible to restrict (prevent) the positional deviation of the outer wall joint material 10 in the panel thickness direction T with respect to the outer wall panel 24.

Next, the operation and effect of the first embodiment will be described.
The outer wall joint material 10 having the above configuration is disposed in a joint 26 formed between the outer wall panels 22 and 24 in a compressed state in the panel adjacent direction S. In the outer wall joint material 10, a hydrophobic urethane foam material 14 and a water-swellable urethane foam material 16 are laminated in the panel thickness direction T. Thereby, in the panel thickness direction T, since the part which consists only of the hydrophobic urethane foam 14 does not exist, an airtight performance and a watertight performance can be improved compared with the case where the said part exists.

  That is, in the configuration in which the hydrophobic urethane foam material 14 and the water-swellable urethane foam material 16 are laminated in the panel adjacent direction S as in the comparative example 100 shown in FIGS. In the direction T, there is a portion consisting only of the hydrophobic urethane foam 14. Since the hydrophobic urethane foam material 14 has lower limit values of airtightness performance and watertightness performance than the water-absorbing swellable urethane foam material 16, the airtightness performance and watertightness performance (3500 Pa required) for a high-rise building exceeding 10 stories. However, in this embodiment, the problem can be solved. 10 to 11B, the same reference numerals are given to the same configurations as those in the present embodiment.

  In addition, in this embodiment, the water-absorbing swellable urethane foam material 16 is supported by the hydrophobic urethane foam material 14 in the panel thickness direction T of the outer wall panels 22, 24. The dimension (thickness) a of the material 16 can be reduced (thinned). Thereby, since the deformation | transformation at the time of water absorption freezing of the water absorption swelling urethane foam 16 can be accelerated | stimulated and the pressure (stress) added to the outer wall panels 22 and 24 can be reduced, damage to the outer wall panels 22 and 24 by water absorption freezing can be carried out. It becomes possible to prevent.

  That is, by reducing the dimension a, the water-absorbing swellable urethane foam 16 is easily bent when viewed from the longitudinal direction C during water absorption freezing, so that the pressure (stress) applied to the outer wall panels 22 and 24 can be reduced. . Furthermore, since the water-absorbing swellable urethane foam 16 is supported by the hydrophobic urethane foam 14, the water-absorbing swellable urethane foam 16 can be prevented from falling in the panel thickness direction T. In other words, when the dimension a is reduced, the water-swellable urethane foam 16 is formed in the panel thickness direction T when the outer wall joint material 10 is disposed in the joint 26 or when the water-swellable urethane foam 16 is frozen. However, the support of the hydrophobic urethane foam 14 can prevent the collapse. Further, when the water-absorbing swellable urethane foam 16 is restored by freezing and thawing, the hydrophobic urethane foam 14 assists the restoration of the water-absorbing swellable urethane foam 16, so that the water-absorbing swellable urethane foam 16 is replaced with the original one. It becomes possible to return to the position.

  Furthermore, in this embodiment, the water-absorbing swellable urethane foam 16 has a height direction B (panel adjacent direction S) when the dimension a in the stacking direction A (panel thickness direction T) is 1 in an uncompressed state. The dimension b is set to 1 or more. Thereby, the deformation | transformation at the time of water absorption freezing of the water absorption swelling urethane foam 16 can be accelerated | stimulated effectively.

  In the present embodiment, one surface in the height direction B of the hydrophobic urethane foam material 14 and the water-absorbing swellable urethane foam material 16 is joined to one outer wall panel 24 by the double-sided adhesive tape 20. Thereby, the position shift of the hydrophobic urethane foam 14 and the water-swellable urethane foam 16 in the panel thickness direction T with respect to the one outer wall panel 24 is regulated. As a result, the hydrophobic urethane foam 14 and the water-swellable urethane foam 16 are changed in the panel thickness direction T with respect to one outer wall panel 24 by deformation due to water absorption freezing of the water-swellable urethane foam 16 and restoration by freeze-thawing. Can be prevented from being displaced. As a result, the state immediately after construction can be maintained over a long period of time.

  Furthermore, the outer wall joint material 10 according to the present embodiment joins the hydrophobic urethane foam material 14 and the water-swellable urethane foam material 16, and allows more ventilation than the hydrophobic urethane foam material 14 and the water-swellable urethane foam material 16. It has an adhesive layer (film base double-sided pressure-sensitive adhesive tape 18) having low property and high water-stopping property. Since this film base double-sided adhesive tape 18 is interposed between the hydrophobic urethane foam 14 and the water-swellable urethane foam 16 aligned in the panel thickness direction T, the film base double-sided adhesive tape 18 The airtight performance and watertight performance can be further improved. And since this film base material double-sided adhesive tape 18 has the base material which consists of resin films, compared with the case where the double-sided adhesive tape which does not have a resin film is used, airtight performance and watertight performance are obtained. This can be further improved. Further, the airtight performance and the watertight performance can be controlled by selecting the material of the adhesive layer.

  Moreover, since the outer wall joint material 10 which concerns on this embodiment is a composite material comprised including the hydrophobic urethane foam material 14 and the water absorption swelling urethane foam material 16, the water absorption swelling urethane foam material 16 is a longitudinal direction. The protrusion and drop-off from the joint 26 due to expansion to C can be prevented. Thereby, the watertightness and airtightness of the joint 26 can be maintained over a long period of time.

  Further, in the present embodiment, the good flexibility and resilience of the hydrophobic urethane foam material 14 can follow the level difference or rough surface of the joint 26, and the water stop interface such as an extruded cement board (ECP). High watertightness and airtightness can be ensured by the water-absorbing swelling of the water-absorbing swellable urethane foam material 16 in complicated connecting portions such as fine irregularities and cross joints.

  Further, in the outer wall joint material 10, the surface on one side in the height direction B in the hydrophobic urethane foam material 14 and the water-absorbing swelling urethane foam material 16 is joined to one outer wall panel 24 by the double-sided adhesive tape 20. The interface between the hydrophobic urethane foam 14 and the water-absorbing swellable urethane foam 16 and the one outer wall panel 24 can be stopped well.

  By the way, the outer wall joint material (sealing material) needs to have a high water-stopping property, and the water-proofing material for the secondary sealing material in consideration of the case where the commonly used primary waterproof wet sealant is cut. Is required. In particular, a sealing material used for a building having 10 stories or more requires high water-stopping properties, and a secondary sealing material is required to have high water-stopping properties.

  Currently, as the secondary sealing material for joints (secondary waterproofing material; backup material), ethylene propylene diene rubber (EPDM) type, silicone type, chloroprene rubber (CR) type molded products, etc. are often used. There are the following improvement requests.

(1) There are many hollow molded products etc., and the cost of the sealing material itself is high.
(2) Workability is poor because the shape is complex, the number of parts is large, and the hardness of the sealing material is high.
(3) When used for a long time, compressive residual strain (sagging) occurs, it is impossible to follow the dimensional variation of the outer wall material due to temperature change, and water and air leak from the joints (gap).
(4) Although the water-absorbing swelling type sealing material has high performance, it has been pointed out that the outer wall panel is damaged due to water absorption freezing, and that the water-absorbing swelling type sealing material falls off without being able to fit in the joint after water absorption. As a countermeasure, a sealing material with a reduced water absorption expansion rate cannot ensure sufficient performance.
(5) The urethane-based sealing material is soft and has good workability but low airtightness.
(6) In the composite product (comparative example 100: FIG. 10 and FIG. 11 described above) in which the urethane type swelling type and the hydrophobic type are combined, the waterproof and airtight limit value of the hydrophobic urethane foam part is low. Not suitable for high-rise buildings.

  In order to meet the above improvement requirements, (a) a low-cost sealing material, (b) a sealing material that is excellent in flexibility and effective, (c) a sealing material that can maintain a sufficient water stoppage even at low hardness and low compression, (D) Sealing material with excellent resilience and good shape followability, (e) Sealing material that can prevent dropout and panel damage due to water absorption freezing, (f) Specification for high-rise buildings with waterproof (airtightness) specifications (3500 Pa) A seal material that can meet the requirements is required.

  In this respect, in the outer wall joint material 10 according to the present embodiment, a low-cost foamed urethane-based fixed sealing material can be used as the material of the hydrophobic urethane foam material 14 and the water-absorbing swelling urethane foam material 16. Can be reduced. In addition, the urethane foam-type fixed sealing material is excellent in flexibility, so that the workability can be improved.

  In addition, the urethane foam fixed sealant has excellent restorability and good shape followability to rough surfaces and steps, so that it can exhibit sufficient water-stopping properties and has excellent resilience. Stable airtightness and watertightness can be exhibited.

  Further, the outer wall joint material 10 is a composite product in which a high-performance water-swellable urethane foam 16 is distributed and used in an appropriate position, so that it can maintain a sufficient water-stopping property even at low hardness and low compression. In addition to being able to satisfactorily stop fine gaps such as those, the water-absorbing swellable urethane foam 16 does not swell more than necessary. Therefore, it is easy to prevent damage to the outer wall panel due to water absorption freezing, and it is possible to prevent protrusion and dropout from the joint due to expansion in the length direction.

  As described above, in the outer wall joint material 10 according to the present embodiment, by using a necessary amount of the water-absorbing swellable urethane foam material 16 in a necessary portion, that is, by using a composite product, various conventional improvement requests are cleared. It has an excellent effect that it can be performed. Below, the Example and performance evaluation of the outer wall joint material which concern on this invention are demonstrated.

<Example>
As the water-absorbing swellable urethane foam material 16, a soft urethane foam mixed with a water-absorbing polymer (for example, “Insulon” manufactured by Nihon Hojo Co., Ltd.) is applied. As the hydrophobic urethane foam material 14, a flexible urethane foam (for example, , “Super Seat” manufactured by Nippon Hojo Co., Ltd.) is applied. This super sheet has a water repellent function, exhibits a stable water stop even at low compression, and has both flexibility and resilience. The hydrophobic urethane foam material 14 is appropriately selected depending on the required performance (softness and water stoppage).

<Performance evaluation>
Next, as a performance evaluation of the outer wall joint material 10, an airtightness evaluation and a watertightness evaluation will be described. For airtightness evaluation, a flat test piece 30 in which a water-absorbing swellable urethane foam material having a thickness of 5 mm and a hydrophobic urethane foam material having a thickness of 10 mm are laminated in two layers in the thickness direction (FIG. 4). And a flat test piece 32 made of only a hydrophobic urethane foam material having a thickness of 15 mm (comparative example; see FIG. 4).

  For watertight evaluation, a ring-shaped test piece 40 in which a water-absorbing swellable urethane foam material having a thickness of 5 mm and a hydrophobic urethane foam material having a thickness of 10 mm are laminated in two layers in the radial direction (see FIG. 5 (see A), a ring-shaped test piece 42 in which a water-absorbing swellable urethane foam material having a thickness of 5 mm and a hydrophobic urethane foam material having a thickness of 10 mm are laminated in two layers in the axial direction (comparative example) ; See FIG. 5B).

  As the hydrophobic urethane foam of the test pieces 30, 32, 40, 42, “Super Sheet HPU (hydrophobic foamed urethane-based sealing material)” manufactured by Nippon Kajo Co., Ltd. was used. This “super sheet HPU” has the performance shown in Table 3 below.

  Moreover, as the water-absorbing swelling urethane foam material of the test pieces 30, 40, 42, “Insulon JS soft (water swelling high water pressure waterproofing foam sealing material)” manufactured by Nippon Hojo Co., Ltd. was used. This “Insulon JS software” has the performance shown in Table 4 below.

  In addition, the physical-property measuring method of the said Table 1-Table 4 applies to the method shown in the following Table 5.

  Moreover, the jig | tool 50 shown by FIG. 4 was used for airtight evaluation. The jig 50 has a pair of plates 52 and 54 disposed to face each other. Pipes 56 and 58 are coaxially joined to the pair of plates 52 and 54 on the surfaces facing the counterparts, respectively. The pair of plates 52 and 54 and the pair of pipes 56 and 58 are made of a transparent resin. In this jig 50, a pair of plates 52 and 54 are fastened by a plurality of bolts 60 and a wing nut 62 in a state where the test piece 30 or the test piece 32 is sandwiched between the pair of pipes 56 and 58 in the thickness direction. Is done. A tube 66 is connected to one plate 52 through a joint 64, and air is sent into one pipe 56 through the tube 66 and the joint 64. Thereby, pressurization of 3500 Pa was performed on each of the test pieces 30 and 32 in the thickness direction.

  As a result of the airtightness evaluation test, the flow rate of the air passing through the test piece 32 (comparative example: only the hydrophobic urethane foam material) was 1000 cc or more / min, whereas the outer wall joint material 10 according to the present embodiment. The flow rate of the air passing through the test piece 30 having the same configuration as that in FIG. Thereby, the outstanding airtight performance of the outer wall joint material 10 which concerns on this embodiment was confirmed.

On the other hand, the jig 70 shown in FIG. 5 was used for water tightness evaluation. The jig 70 has the same configuration as the jig 50 described above except that the pipes 56 and 58 described above are omitted. Therefore, in FIG. doing. In this jig 70, the pair of plates 52, 54 is composed of a plurality of bolts 60 and a wing nut 62 with the ring-shaped test piece 40 or the test piece 42 sandwiched between the pair of plates 52, 54 in the axial direction. It is concluded by. At this time, the test piece 40 or the test piece 42 was compressed until the thickness was changed from 15 mm to 10 mm (compression rate: 33.3%). Then, water was sent into the test piece 40 or the test piece 42 through the tube 66 and the joint 64, and pulsating water pressure was applied to the test piece 40 or the test piece 42 from the inside. This pulsating water pressure has a cycle of 5 seconds, and steps 1 to 8 in Table 6 below were performed for 10 minutes each.

  As a result of the watertightness evaluation test, the test piece 42 (comparative example) could only stop water up to step 2, whereas the test piece 40 having the same configuration as the outer wall joint material 10 according to the present embodiment had a step. The water could be stopped up to 8. Thereby, the outstanding watertight performance of the outer wall joint material 10 which concerns on this embodiment was confirmed.

  Next, another embodiment of the present invention will be described. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol as the said 1st Embodiment is provided, and the description is abbreviate | omitted.

<Second Embodiment>
FIG. 6 shows a perspective view of an outer wall joint material 80 as a sealing material between panels according to the second embodiment of the present invention, and FIG. 7 (A) shows the second embodiment of the present invention. The outer wall joint material 80 as a sealing material between the panels is shown in a sectional view. FIG. 7B shows a cross-sectional view of an outer wall joint structure 92 (seal structure) configured by applying the outer wall joint material 80.

  In this outer wall joint material 80, two (a pair of) hydrophobic urethane foam materials 14 (14A, 14B) and a water-absorbing swelling foam resin material 16 disposed between the pair of hydrophobic urethane foam materials 14A, 14B; Are stacked in three layers. The hydrophobic urethane foam materials 14A and 14B and the water-absorbing swelling urethane foam material 16 are joined by a pair of film base double-sided adhesive tapes 18, respectively. The total dimension in the stacking direction A (panel thickness direction T) in the hydrophobic urethane foams 14A and 14B is set to be larger than the dimension in the stacking direction A in the water-absorbing swellable urethane foam 16. Double-sided pressure-sensitive adhesive tape 20 as a positional deviation restricting means is joined to one surface in the height direction B of the hydrophobic urethane foams 14A and 14B and the water-absorbing swellable urethane foam 16. In this embodiment, the configuration other than the above is the same as that of the first embodiment.

  Also in this embodiment, the same operational effects as in the first embodiment can be obtained. In addition, in this embodiment, the water-absorbing swellable urethane foam material 16 is supported from both sides in the panel thickness direction T by the pair of hydrophobic urethane foam materials 14A and 14B. The water-absorbing swellable urethane foam 16 is unlikely to fall down in the panel thickness direction T at the time of installation or when the water-absorbing swellable urethane foam 16 is frozen. Furthermore, since a total of two film base double-sided adhesive tapes 18 (adhesive layer) are interposed between the pair of hydrophobic urethane foams 14A and 14B and the water-absorbing swelling urethane foam 16, confidentiality performance and Watertight performance can be further improved. Further, the hydrophobic urethane foam materials 14A and 14B and the water-absorbing swellable urethane foam material 16 are multilayered in three layers, thereby improving the balance during compression.

<Third Embodiment>
FIG. 8 is a perspective view showing an outer wall joint material 90 as a sealing material between panels according to the third embodiment of the present invention. FIG. 9A shows a cross section of the outer wall joint material 90. It is shown in the figure. FIG. 9B is a sectional view showing an outer wall joint structure 92 (seal structure) configured by applying the outer wall joint material 90.

  In this outer wall joint material 90, three hydrophobic urethane foam materials 14 (14A, 14B, 14C) and two (a pair) disposed between these three hydrophobic urethane foam materials 14A, 14B, 14C, respectively. The water-absorbing swellable foamed resin material 16 (16A, 16B) is laminated in five layers. The hydrophobic urethane foams 14A, 14B, 14C and the water-absorbing swellable urethane foams 16A, 16B are joined by four film base double-sided adhesive tapes 18 respectively. The total dimension in the stacking direction A (panel thickness direction T) in the hydrophobic urethane foams 14A, 14B, and 14C is set to be larger than the total dimension in the stacking direction A in the water-absorbing swelling urethane foams 16A and 16B. Yes. Double-sided pressure-sensitive adhesive tape 20 as a positional deviation restricting means is joined to one surface in the height direction B of the hydrophobic urethane foam materials 14A, 14B, 14C and the water-absorbing swelling urethane foam materials 16A, 16C. In this embodiment, the configuration other than the above is the same as that of the first embodiment.

  Also in this embodiment, the same operational effects as in the first embodiment can be obtained. In addition, in this embodiment, the pair of water-absorbing swellable urethane foam materials 16A and 16B are supported from both sides in the panel thickness direction T by the three hydrophobic urethane foam materials 14A, 14B and 14C. At the time of construction in which 90 is disposed in the joint 26 or at the time of water absorption freezing of the water-swellable urethane foams 16A and 16B, the water-swellable urethane foams 16A and 16B are unlikely to fall down in the panel thickness direction T. Furthermore, since a total of four film base double-sided adhesive tapes 18 (adhesive layers) are interposed between the pair of hydrophobic urethane foams 14A, 14B, 14C and the water-absorbing swelling urethane foams 16A, 16B. In addition, confidentiality performance and watertightness performance can be further improved. In addition, the hydrophobic urethane foams 14A, 14B, 14C and the water-absorbing swelling urethane foams 16A, 16B are multi-layered into five layers, thereby further improving the balance during compression.

  In the first to third embodiments, the composition ratio between the hydrophobic urethane foam material 14 and the water-absorbing swellable urethane foam material 16 is the seal width to be sealed by the outer wall joint materials 10, 80, 90, and the outer wall joint material. It is preferable to optimize by the compression ratio of the materials 10, 80, 90, and the like.

  While the present invention has been described with reference to several embodiments, the present invention can be implemented with various modifications without departing from the spirit of the present invention. It goes without saying that the scope of rights of the present invention is not limited to the above embodiments.

10 Outer wall joint material (Seal between panels)
12 Outer wall joint structure (seal structure)
14 Hydrophobic urethane foam 16 Water-absorbing swelling urethane foam (water-absorbing swelling foamed resin material)
18 Film base double-sided adhesive tape (adhesive layer)
22, 24 Outer wall panel (panel)
26 Joints (Gap)
80 Exterior wall jointing material (sealing material between panels)
82 Outer wall joint structure (seal structure)
90 Outer wall joint material (Seal between panels)
92 Outer wall joint structure (seal structure)

Claims (9)

  In a gap formed between adjacent panels in a direction orthogonal to the thickness direction, the dry sealant is disposed in a compressed state in the orthogonal direction and seals the gap, the thickness direction A sealing material between panels composed of a hydrophobic urethane foam and a water-swellable foamed resin material laminated together.   2. The sealing material between panels according to claim 1, wherein the non-compressed water-absorbing swellable foamed resin material has a dimension in the orthogonal direction set to 1 or more when the dimension in the thickness direction is 1.   In the hydrophobic urethane foam material and the water-absorbing swellable foamed resin material, the one side surface in the orthogonal direction is the thickness with respect to the one by the displacement control means provided on one of the one side surface or the adjacent panel. The sealing material between panels of Claim 1 or Claim 2 in which the position shift of a vertical direction is controlled.   The plurality of hydrophobic urethane foam materials arranged in the thickness direction, and one or a plurality of water-swellable foamed resin materials disposed between the plurality of hydrophobic urethane foam materials. The sealing material between panels of any one of Claim 3.   Claim 1-Claim which has hydrophobicity foaming material and water-absorbing swelling foamed resin material, and has an adhesive layer with low air permeability and high water blocking properties than hydrophobic urethane foaming material and water-absorbing swelling foaming resin material. Item 5. The sealing material between panels according to any one of items 4.   The said adhesive layer is a sealing material between panels of Claim 5 which has a base material which consists of resin films. A hydrophobic urethane foam material and a water-swellable foamed resin material laminated in a laminating direction perpendicular to each longitudinal direction;
In the hydrophobic urethane foam material and the water-absorbing swellable foamed resin material, a double-sided adhesive tape joined to one side surface in the direction perpendicular to the longitudinal direction and the laminating direction;
Sealing material between panels composed of. A seal structure that seals a gap formed between adjacent panels in a direction orthogonal to the thickness direction with a dry sealing material arranged in the gap in a state compressed in the orthogonal direction,
The sealing material is configured to include a hydrophobic urethane foam material and a water-swellable foamed resin material laminated in the thickness direction.   The seal structure according to claim 8, further comprising a positional deviation regulating unit that regulates the positional deviation of the sealing material in the thickness direction with respect to one of the adjacent panels.