JP2008184781A - Waterproof sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof sheet with excellent construction efficiency disposed between the inner structural member and the outer structural member of a structure and capable of properly preventing the invasion of a liquid such as rainwater from the outer structural member side to the inner structural member side. <P>SOLUTION: This waterproof sheet is disposed between the inner structural member and the outer structural member of the structure. The surface of the waterproof sheet has a rubber-like elasticity. Even when a needle body is extended through the waterproof sheet to secure it to the structure, the surface of the waterproof sheet is elastically press-fitted to the needle body since the surface has a rubber-like elasticity. Therefore, a gap is not produced between the needle-like body and the waterproof sheet opposed thereto. Consequently, since a liquid such as rainwater does not enter the inner structural member side of the structure, the structure can be effectively prevented from being corroded. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a waterproof sheet. More specifically, the present invention relates to a waterproof sheet used to prevent water from entering the inner structural member of the structure.

  Conventionally, as an outer wall structure of a building, a structure in which a waterproof sheet is interposed between the outer wall material and the wall base material is used in order to prevent rainwater from entering from the outer wall material to the wall base material. As such an outer wall structure, in Patent Document 1, a wall base material composed of a panel base plate attached to the front of the panel frame, and a wall base sheet (waterproof sheet) stretched on the front of the wall base material, A wall panel comprising a siding board nailed to a panel frame from above the wall base sheet is disclosed.

  However, when the siding board is nailed to the wall panel, the nail member penetrates the wall base sheet and is driven into the wall base material, so that a through hole is formed in the wall base sheet. Therefore, the water that has entered the wall through the nail member from the outside of the siding board passes through the through hole of the wall base sheet and reaches the wall base material, which causes corrosion of the wall base material. there were.

  As an outer wall structure that solves the above-mentioned problems, Patent Document 2 discloses that an outer wall made of lath mortar is closely attached to the outside of a waterproof sheet at a driving position of a nail member for fixing a lath. An outer wall waterproof structure is disclosed in which a member is disposed, a waterproof sheet is penetrated together with the packing member, and a nail member is driven toward a ventilation layer forming member.

  However, the following problems still remain in the outer wall waterproof structure. That is, depending on the waterproof sheet used, even if the packing member is in close contact, the adhesion between the waterproof sheet surface and the packing, that is, if the familiarity between the surfaces is poor, external moisture enters from there, and eventually penetrates. It means that it passes through the hole and reaches the wall base material. In addition, there is a problem that the operation of fixing the packing member in close contact with the nail member driving position outside the waterproof sheet and driving the nail member while holding the sheet with the hand may be shifted. There was also an inferior point.

JP-A-7-180318 JP 2006-348660 A

  The present invention is constructed between the inner structural member and the outer structural member of the structure, and can be more suitably prevented from entering liquid such as rain water from the outer structural member side to the inner structural member. Provide an excellent tarpaulin.

  The waterproof sheet of the present invention is a waterproof sheet that is used by being disposed between an inner structural member and an outer structural member of a structure, and has a surface having rubber-like elasticity.

  The waterproof sheet is characterized by comprising a surface layer containing a material having rubber-like elasticity and a base material layer laminated on the back surface of the surface layer.

  And the said waterproof sheet WHEREIN: The water stop layer containing a water absorbing resin is laminated | stacked and integrated, It is characterized by the above-mentioned.

  Furthermore, the waterproof sheet is characterized in that an adhesive layer is laminated and integrated on the back surface of the base material layer.

  In the waterproof sheet, a nonwoven fabric is further laminated and integrated on the back surface of the adhesive layer, and a part of the adhesive layer is oozed out of the nonwoven fabric.

  Finally, in the waterproof sheet, the material having rubber-like elasticity is a silicone resin.

  The waterproof sheet of the present invention is a waterproof sheet used by being disposed between the inner structural member and the outer structural member of the structure, and the surface has rubber-like elasticity. Even when the needle-like body is penetrated to fix it to the structure, the surface has rubber-like elasticity, so the surface of the waterproof sheet is elastically pressure-bonded to the needle-like body, and the needle-like body and this There is no gap between the facing waterproof sheet, and therefore liquid such as rainwater will not accidentally enter the inner structural member side of the structure, and effectively prevent corrosion of the structure. Can do.

  And as above-mentioned, since the waterproof sheet of this invention closely_contact | adheres to a needle-like body and a clearance gap does not arise between needle-like bodies, the penetration part of the waterproof sheet by a needle-like body is another member. Therefore, it does not need to be treated and has excellent workability.

  Further, when the waterproof sheet includes a surface layer containing a material having rubbery elasticity and a base material layer laminated on the back surface of the surface layer, the waterproof sheet has excellent mechanical strength and handling. Have excellent workability.

  In the waterproof sheet, when the water-stopping layer containing the water-absorbing resin is laminated and integrated, the water-stopping layer reliably absorbs moisture such as rainwater that has entered the waterproof sheet. Prevents the ingress of rainwater and other liquids into the inner structural member by preventing the water-stopping layer from expanding and forming a gap with the needle-shaped body. ing.

  Furthermore, in the said waterproof sheet, when the adhesion layer is laminated | stacked and integrated on the back surface of the base material layer, it can carry out temporary fixing with respect to a structure easily, and has the outstanding workability. And, when the adhesive layer is composed of a silicone resin or a modified silicone resin, or when the adhesive layer is composed of an adhesive and the thickness is increased, a waterproof effect can be imparted to the adhesive layer as well. The sheet exhibits further excellent waterproofness.

  In the above waterproof sheet, when the nonwoven fabric is further laminated and integrated on the back surface of the adhesive layer, and a part of the adhesive layer is exuded from the nonwoven fabric, the adhesive strength of the adhesive layer is temporarily fixed to the structure. Therefore, it is possible to prevent the workability from being deteriorated due to the dust or dust generated at the work site adhering to the adhesive layer more than necessary.

  Finally, in the waterproof sheet, when the material having rubber-like elasticity is a silicone-based resin, in addition to the clogging of the gap formed by the penetration of the needle-like body, it can also exert a water repellent effect, The waterproof sheet exhibits further excellent waterproof properties.

  An example of the waterproof sheet of the present invention will be described with reference to the drawings. The waterproof sheet A is formed of a material having rubber-like elasticity on the surface. Specifically, as shown in FIG. 1, the surface layer 1 containing a material having rubber-like elasticity and the surface layer 1 And a base material layer 2 laminated and integrated on the back surface.

  Specifically, the surface layer 1 is composed of a sheet containing a material having rubber-like elasticity. As will be described later, in fixing the waterproof sheet A to the inner structural member of the structure, a needle-like body is driven into the waterproof sheet A from the outer side toward the inner structural member. Is formed.

  However, the surface layer 1 includes a material having rubber-like elasticity, and is elastically pressure-bonded toward the needle-like body, whereby a gap is formed between the needle-like body and the surface layer 1 facing the needle-like body. In addition, liquid such as rainwater does not enter the inner structural member side of the structure through the through-hole formed in the waterproof sheet A. Examples of the needle-like body include nails, metal pins, staples, and the like.

  Examples of the rubber-like elastic material include silicone resins, modified silicone resins, polysulfide resins, acrylic urethane resins, polyurethane resins, and polybutylene resins, which have water repellency and are waterproof sheets. A silicone resin and a modified silicone resin are preferable in that the waterproofing effect can be improved.

  Examples of the silicone resin include polydimethylsiloxane, polyphenylsiloxane, polymethylphenylsiloxane, polymethylhydrogensiloxane, and the like, and examples of the modified silicone resin include polyether-modified silicone. Examples thereof include resins, epoxy-modified silicone resins, amino-modified silicone resins, carboxy-modified silicone resins, carbinol-modified silicone resins, mercapto-modified silicone resins, and higher fatty acid ester-modified silicone resins.

  A base material layer 2 is laminated and integrated on the back surface of the surface layer 1 in order to improve the mechanical strength of the waterproof sheet A and improve the handleability of the waterproof sheet A by giving the waterproof sheet A a waist. ing.

  The base material layer 2 is formed by laminating and integrating a water-stopping layer 22 containing a water-absorbing resin on the back surface of the sheet 21. The sheet 21 is not particularly limited as long as it has been conventionally used as a tape base material. For example, a synthetic resin sheet such as a polyester sheet, a polyamide sheet, a polycarbonate sheet, a polyimide sheet, and a polycarbodiimide sheet, glass Nonwoven fabrics, woven fabrics, knitted fabrics and the like made of fibers, polyester fibers, polyamide fibers, acrylic fibers, aramid fibers and the like are mentioned, and synthetic resin sheets and nonwoven fabrics are preferred.

 The water-stopping layer 22 contains a water-absorbing resin, and when liquid such as rainwater enters the waterproof sheet A through the needle-like body penetrating the waterproof sheet A, the liquid is stopped. It prevents the layer 4 from smoothly absorbing and entering the inner structural member side, absorbs the liquid and swells into a gel, and the waterstop layer 22 is elastically pressed toward the needle-like body. The pressure resistance of the waterproof sheet A can be improved by preventing a gap from being formed between the needle-like body and the water blocking layer 22 facing the needle-like body by this pressure bonding.

  The water-absorbing resin is a resin that can absorb and swell when brought into contact with water to form a gel. For example, anionic resins such as polyacrylates and polysulfonates; cations such as quaternary ammonium salts and polyethyleneimine Nonionic resins such as polyvinyl alcohol, polyacrylamide, and polyethylene glycol; polyglutamic acid resins, polyaspartic acid resins, maleic anhydride resins, hydrophilic polyurethane resins, starch, cellulose, and the like.

  The adhesive layer 3 is laminated and integrated on the back surface of the water blocking layer 22 of the base material layer 2. The pressure-sensitive adhesive layer 3 only needs to have a pressure-sensitive adhesive strength such that the waterproof sheet A can be temporarily fastened to the inner structural member of the structure.

  Specifically, the material constituting the pressure-sensitive adhesive layer 3 is not particularly limited, and in addition to pressure-sensitive adhesives such as a krill-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, and a rubber-based pressure-sensitive adhesive, the silicone-based resin and the modified silicone are used. Based resins and the like.

  When the adhesive layer 3 uses a silicone resin or a modified silicone resin as a material constituting the adhesive layer 3, as described above, when the needle-like body is passed through the waterproof sheet, the adhesive layer 3 Is elastically pressure-bonded toward the needle-shaped body, and this pressure-bonding prevents a gap from being formed between the needle-shaped body and the pressure-sensitive adhesive layer 3 facing the needle-shaped body. At the same time, the waterproof effect can be exhibited and the waterproofness of the waterproof sheet A can be further improved.

  Moreover, when the said adhesive layer 3 is comprised from the adhesive, when the needle-shaped body is penetrated through the waterproof sheet by increasing the thickness of the adhesive layer 3, as described above, the adhesive layer 3 The pressure-sensitive adhesive constituting the fluid flows and no gap is formed between the needle-shaped body and the pressure-sensitive adhesive layer 3 facing the needle-shaped body, and the pressure-sensitive adhesive layer 3 together with the surface layer 1 has a waterproof effect as described above. The waterproof property of the waterproof sheet A can be further improved.

  And since the waterproof sheet A is used in a construction site with much dust and dust, if the adhesive force of the adhesive layer 3 of the waterproof sheet A is strong, there is a possibility that the adhesive layer 3 may adsorb dust and dust. Therefore, when the pressure-sensitive adhesive layer 3 is composed of a pressure-sensitive adhesive, and the pressure-sensitive adhesive has an unnecessarily strong adhesive force, the nonwoven fabric 4 is laminated and integrated on the back surface of the pressure-sensitive adhesive layer 3 as shown in FIG. You may adjust the adhesive force of the adhesion layer 3 by making part of the adhesion layer 3 ooze from the clearance gap between the fibers which are carrying out.

  Next, an example of how to use the waterproof sheet A will be described. The waterproof sheet A is used, for example, to constitute a wall structure of a building such as a house. Specifically, as shown in FIG. 3, a wall base material 5, which is an inner structural member, is disposed and fixed to a pillar of a house using known means, and is attached to the outer surface of the wall base material 5. The waterproof sheet A is disposed with the surface layer 1 facing outward, and the lath 6 is disposed on the outer surface of the waterproof sheet A.

  In addition, the adhesive layer 3 is provided in the back surface of the waterproof sheet A, and it can be temporarily fixed to the outer surface of the wall base material 5 with the adhesive force of this adhesive layer 3, and workability | operativity is good.

  Then, in order to fix the waterproof sheet A and the lath 6 to the wall base material 5, the reverse U-shaped needle-like body (not shown) is straddled across the lath 6 at an arbitrary position. The sheet A is penetrated from the surface layer 1 side and driven into the wall base material 5.

  At this time, a through hole is formed in the waterproof sheet A by penetrating the needle-like body, but the surface layer 1 of the waterproof sheet A has rubber-like elasticity, and its surface is restored by its own elastic restoring force. The layer 1 was pressure-bonded to the outer peripheral surface of the needle-like body, and as a result, no gap was formed between the needle-like body and the surface layer 1 of the waterproof sheet A opposed to the needle-like body. Water such as rainwater does not enter the inner structural member side through the through hole.

  Further, the waterproof sheet A includes a water blocking layer 22, and as described above, the surface layer 1 prevents rainwater from entering the waterproof sheet A from the outside. Even when an unexpected situation such as rainwater enters the waterproof sheet A, the waterproof layer 22 smoothly absorbs and swells rainwater that has entered the waterproof sheet A and the waterproof layer 22 A gap is not formed between the needle-like body and the water-stopping layer 22 facing the needle-like body in close contact with the shaped body, so that rainwater or the like does not reach the inner structural member side.

  And the wall structure of a house can be comprised by arrange | positioning and fixing the outer wall material 7 which is an external structural member to the outer side of the lath 6. FIG.

  Next, a waterproof sheet having a configuration different from that of the waterproof sheet A will be described. In the following waterproof sheet A, all the surface layers 1 have the same configuration as the surface layer 1 of the waterproof sheet A in FIG.

  In the waterproof sheet A, the case where the base material layer 2 is composed of the sheet 21 and the water stop layer 22 laminated and integrated on the back surface of the sheet 21 has been described. As shown in FIG. 2 may be formed by integrating a water stop layer 24 between the two sheets 23 and 23. The back surface of the base material layer 2 may or may not be provided with an adhesive layer (FIG. 4 shows a waterproof sheet in which an adhesive layer is not formed). The sheet 23 and the water blocking layer 24 are the same as the waterproof sheet A shown in FIG. 1, and the two sheets 23 and 23 may be the same or different. The same thing as 1 waterproof sheet A is used.

  Further, as shown in FIG. 5, the base material layer 2 is composed of the sheet 25 without providing a water stop layer on the back surface of the sheet 21, and the adhesive layer 3 is laminated and integrated on the back surface of the sheet 25 to waterproof. The sheet A may be configured. In this waterproof sheet A, when the pressure-sensitive adhesive layer 3 is made of a pressure-sensitive adhesive, the thickness is increased so that the waterproof effect is exhibited as described above. However, the pressure-sensitive adhesive layer 3 made of a pressure-sensitive adhesive is used. When it is not necessary to exhibit the waterproof effect, the pressure-sensitive adhesive layer 3 only needs to have a thickness that can exert a pressure-sensitive adhesive force that can be temporarily fixed to the structure. The sheet 25 and the adhesive layer 3 are the same as the waterproof sheet A in FIG.

  Furthermore, as shown in FIG. 6, in the waterproof sheet A of FIG. 5, the adhesive layer 3 is composed of an adhesive, and when the adhesive has a stronger adhesive force than necessary, the waterproof sheet A of FIG. Similarly, the non-woven fabric 4 is laminated and integrated on the back surface of the pressure-sensitive adhesive layer 3, and a part of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 3 is leached out from the gaps between the fibers constituting the non-woven fabric. May be adjusted.

  Further, as shown in FIG. 7, the waterproof sheet A may be composed only of a rubber-like elastic sheet (surface layer 1). In addition, the release film may be attached so as to be peelable, and the release film may be peeled off from the waterproof sheet A during use.

It is the longitudinal cross-sectional view which showed the waterproof sheet of this invention. It is the longitudinal cross-sectional view which showed another example of the waterproof sheet of this invention. It is the perspective view which showed the usage point of the waterproof sheet of this invention. It is the longitudinal cross-sectional view which showed another example of the waterproof sheet of this invention. It is the longitudinal cross-sectional view which showed another example of the waterproof sheet of this invention. It is the longitudinal cross-sectional view which showed another example of the waterproof sheet of this invention. It is the longitudinal cross-sectional view which showed another example of the waterproof sheet of this invention.

Explanation of symbols

1 Surface layer 2 Base material layer
21, 23, 25 seats
22, 24 Water blocking layer 3 Adhesive layer 4 Non-woven fabric A Waterproof sheet

Claims (6)

A waterproof sheet used by being disposed between an inner structure member and an outer structure member of a structure, wherein the surface has rubber-like elasticity. The waterproof sheet according to claim 1, comprising a surface layer containing a material having rubber-like elasticity and a base material layer laminated on the back surface of the surface layer. The waterproof sheet according to claim 2, wherein the base material layer is formed by laminating and integrating a water stop layer containing a water absorbent resin. The waterproof sheet according to claim 3, wherein an adhesive layer is laminated and integrated on the back surface of the base material layer. The waterproof sheet according to claim 4, wherein a nonwoven fabric is further laminated and integrated on the back surface of the adhesive layer, and a part of the adhesive layer is exuded from the nonwoven fabric. The waterproof sheet according to any one of claims 1 to 5, wherein the material having rubber-like elasticity is a silicone-based resin.

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