JP2597490B2 - Base tarpaulin - Google Patents
Base tarpaulinInfo
- Publication number
- JP2597490B2 JP2597490B2 JP62305460A JP30546087A JP2597490B2 JP 2597490 B2 JP2597490 B2 JP 2597490B2 JP 62305460 A JP62305460 A JP 62305460A JP 30546087 A JP30546087 A JP 30546087A JP 2597490 B2 JP2597490 B2 JP 2597490B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- waterproof
- film
- urethane
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004078 waterproofing Methods 0.000 claims description 51
- 238000000576 coating method Methods 0.000 claims description 44
- 239000011248 coating agent Substances 0.000 claims description 43
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 38
- 238000010276 construction Methods 0.000 claims description 13
- 239000010426 asphalt Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920003002 synthetic resin Polymers 0.000 claims description 7
- 239000000057 synthetic resin Substances 0.000 claims description 7
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 31
- 230000001070 adhesive effect Effects 0.000 description 30
- 239000000853 adhesive Substances 0.000 description 29
- 238000000034 method Methods 0.000 description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 239000000758 substrate Substances 0.000 description 11
- 239000002131 composite material Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 238000010030 laminating Methods 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000007334 copolymerization reaction Methods 0.000 description 3
- 229920001059 synthetic polymer Polymers 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006264 polyurethane film Polymers 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Lining And Supports For Tunnels (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は陸屋根、ベランダ、廊下、室内床などを対象
とした防水工法において使用するウレタン系塗膜防水材
を施工するための下地防水シートに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a base waterproof sheet for applying a urethane-based coating film waterproof material used in a waterproofing method for a flat roof, a veranda, a corridor, an indoor floor, and the like. Things.
（従来の技術） 建築物の防水工法として近年ウレタン系塗膜防水材と
合成高分子系やアスファルト系などの各種防水シートを
組み合わせて防水層を形成するいわゆる複合防水工法が
行なわれるようになった。(Prior Art) In recent years, as a waterproofing method for buildings, a so-called composite waterproofing method in which a waterproof layer is formed by combining a urethane-based coating waterproofing material and various types of waterproofing sheets such as synthetic polymer and asphalt has come to be performed. .
この工法は下地に防水シートを貼り、次いでその防水
シートの上面にウレタン系塗膜防水材を塗布するもので
あるが、本工法においてはウレタン系塗膜防水材と防水
シートとの接着性に乏しく、堅固な防水層を長期にわた
って維持しにくいという大きな難点がある。In this method, a waterproof sheet is attached to the base, and then a urethane-based waterproof film is applied to the upper surface of the waterproof sheet.However, in this method, the adhesion between the urethane-based waterproof film and the waterproof sheet is poor. However, there is a major drawback in that it is difficult to maintain a solid waterproof layer for a long period of time.
そこでウレタン系塗膜防水材と防水シートとの接着性
を向上させる方法として施工現場において防水シートの
表面に特殊プライマーを塗布したり防水シートの表面に
不織布や網状シートなどの繊維質シートを積層したり、
あるいは鉱物質粉粒を撤着するなどの手段が通常行なわ
れている。Therefore, as a method of improving the adhesion between the urethane-based waterproofing material and the waterproof sheet, a special primer is applied to the surface of the waterproof sheet at the construction site, or a fibrous sheet such as a nonwoven fabric or a net-like sheet is laminated on the surface of the waterproof sheet. Or
Alternatively, means such as detachment of mineral particles are usually performed.
しかしながら、プライマー処理による方法では防水シ
ート表面へのプライマー塗布という作業が一工程増える
ことになり、施工能率が低下してしまうという問題が生
じる。However, in the method using the primer treatment, the work of applying the primer to the surface of the waterproof sheet is increased by one step, and there is a problem that the construction efficiency is reduced.
また繊維質シートを積層した防水シートを用いる方法
においては、防水シート表面へのウレタン系塗膜防水材
の施工が天候に大きく左右されるという問題がある。即
ち、防水シートの表面が降雨により濡れると表面に積層
された繊維質シートは雨水を吸水してしまうため、次に
ウレタン系塗膜防止材を塗布するためには、充分な時間
をかけて乾燥させる必要がある。かりにこの乾燥が不充
分で繊維質シートに水分を含有したままウレタン系塗膜
防水材を塗布した場合は、繊維質シートとウレタン系塗
膜防水材層とが強固に接着せず、加えてこの水分の蒸発
圧力により塗膜にフクレを生じさせるという問題が発生
してしまう。そのため防水シートの施工に際しては天候
に注意する必要があり、降雨の恐れがある場合は施工を
延期しなければならず、施工能率が著しく低下してしま
う。Further, in the method using a waterproof sheet in which a fibrous sheet is laminated, there is a problem that the construction of the urethane-based coating film waterproof material on the surface of the waterproof sheet largely depends on the weather. That is, if the surface of the waterproof sheet is wet by rainfall, the fibrous sheet laminated on the surface absorbs rainwater, so that it takes a sufficient time for the urethane-based coating film preventive agent to be applied. Need to be done. However, when the urethane-based coating waterproofing material is applied while the drying is insufficient and the fibrous sheet contains moisture, the fibrous sheet and the urethane-based coating waterproofing material layer do not strongly adhere to each other. The problem of causing blisters on the coating film due to the evaporation pressure of water occurs. Therefore, it is necessary to pay attention to the weather when constructing the waterproof sheet, and if there is a danger of rainfall, the construction must be postponed, resulting in a significant decrease in construction efficiency.
さらに鉱物質粉粒を撤着した防水シートを用いる方法
では鉱物質粉粒とウレタン系塗膜防水材との「濡れ」が
悪く鉱物質粒子間にウレタン系塗膜防水材が浸入しにく
いため空気を内包した形で施工されるため、塗膜に多く
の気泡やフクレが発生し塗膜の防水性能の低下や塗膜表
面の美観がそこなわれるという問題がある。Furthermore, in the method using a waterproof sheet to which the mineral particles are detached, the wettability between the mineral particles and the urethane-based waterproofing material is poor, and the urethane-based waterproofing material does not easily enter between the mineral particles. Since the coating is carried out in a form enclosing the film, many bubbles and blisters are generated in the coating film, and there is a problem that the waterproof performance of the coating film is deteriorated and the appearance of the coating film surface is impaired.
また複合防水工法ばかりではなく、通常実施されてい
る種々のメンブレン防水工法に共通した問題として防水
層のフクレ現象がある。In addition to the complex waterproofing method, a common problem of various types of membrane waterproofing methods commonly used is a blistering phenomenon of a waterproof layer.
すなわち下地に対して防水層が全面にわたって接着さ
れていると直射日光をうけたとき、下地に含まれている
水分が温度上昇によって気化し、その圧力によって防水
層が部分的にフクレてしまう。このような現象を回避す
る必要がある。現在防水層を下地に対して部分的に接着
させ、下地の水分が気化したときその加圧状態にある気
化水分を防水層と下地の非接着部分を通過させて外部に
逃がし、フクレを防止しようという方法が種々提案され
ているがいずれも充分な効果が得られていない。That is, when the waterproof layer is adhered to the entire surface of the substrate, when exposed to direct sunlight, the moisture contained in the substrate evaporates due to a rise in temperature, and the pressure causes the waterproof layer to be partially blistered. It is necessary to avoid such a phenomenon. Attach the waterproof layer partially to the substrate, and when the moisture of the substrate evaporates, let the vaporized moisture in the pressurized state pass through the non-adhesive part of the waterproof layer and the substrate and escape to the outside to prevent blisters Various methods have been proposed, but none of them has been able to obtain a sufficient effect.
（発明が解決しようとする問題点） 上記のようにウレタン系塗膜材と防水シートとを組み
合わせた複合防水工法において、ウレタン系塗膜防水材
と防水シートとの接着性向上策として通常行なわれてい
る方法は、天候に左右され施工能率が低下し、また防水
シートの塗膜防水層との間にフクレを発生させたり、接
着不良をおこすという問題がある。さらに防水層全体の
フクレという現象も防止する必要がある。(Problems to be Solved by the Invention) In the composite waterproofing method in which the urethane-based coating material and the waterproof sheet are combined as described above, it is usually performed as a measure for improving the adhesion between the urethane-based coating waterproof material and the waterproof sheet. These methods have problems in that the construction efficiency is reduced depending on the weather, and that swelling is generated between the waterproof sheet and the waterproof layer of the waterproof sheet, and that adhesion is poor. Further, it is necessary to prevent the phenomenon of blistering of the entire waterproof layer.
本発明はこういった問題点を解決すべく、天候にほ
とんど左右されずに効率良く防水層を形成することがで
き、しかも防水シートとウレタン系塗膜防水材との接着
性にすぐれ防水シートの塗膜防水層との間にフクレの発
生が起こらない複合防水工法に有用な下地防水シートを
提供するものであり、さらに防水層全体のフクレ現象
が起らず、長期間にわたって高い防水機能を維持するこ
とができる複合防水工法に有用な下地防水シートを提供
するものである。In order to solve these problems, the present invention can form a waterproof layer efficiently without being affected by the weather, and has excellent adhesion between the waterproof sheet and the urethane-based waterproofing material. Provides a base waterproof sheet that is useful for composite waterproofing methods that do not generate blisters between the paint film waterproof layer and the high waterproof function for a long period of time without blistering of the entire waterproof layer The present invention provides a base waterproof sheet useful for a composite waterproofing method that can be performed.
（問題点を解決するための手段） 前記問題点を解決するための本発明のウレタン系塗膜
防水材施工用の下地防水シートは、下面に連通した凹溝
を有するアスファルト系、ゴム系又は合成樹脂系シート
の上面に、ポリウレタンに対して接着性の高い合成樹脂
フィルム又はシートを積層したことを特徴とするもので
ある。すなわち、第１図に示したように、本発明の下地
防水シートは下面に連通した凹溝部（連通溝）13を設け
たアスファルト系または合成高分子系シート11の上面に
ポリウレタンとの接着性の高いフィルムもしくはシート
（以後単にフィルムと略記することがある）12が強固に
接着されている。(Means for Solving the Problems) A base waterproofing sheet for applying a urethane-based coating waterproofing material according to the present invention for solving the above-mentioned problems is an asphalt-based, rubber-based or synthetic material having a concave groove communicating with a lower surface. A synthetic resin film or sheet having high adhesiveness to polyurethane is laminated on the upper surface of the resin-based sheet. That is, as shown in FIG. 1, the base waterproof sheet of the present invention has an adhesive property with polyurethane on the upper surface of an asphalt-based or synthetic polymer-based sheet 11 provided with a concave groove (communication groove) 13 communicating with the lower surface. A tall film or sheet (hereinafter sometimes simply abbreviated as film) 12 is firmly adhered.
ここでのフィルム12はシート11と次に施工されるウレ
タン系塗膜防水材14とを強固に接着一体化させるための
接着媒介材としての機能をはたすものである。この目的
を達成するためにフィルム12に必要な特性としては、上
面に塗布されるウレタン系塗膜防水材との接着性にすぐ
れているのはもちろんであるが防水シートの施工中の降
雨にさらされても問題のないように耐水性にすぐれ吸水
性が小さいものであることが重要である。The film 12 here functions as an adhesion mediator for firmly bonding and integrating the sheet 11 and the urethane-based coating waterproofing material 14 to be applied next. In order to achieve this purpose, the film 12 must have excellent adhesion to the urethane-based waterproofing material applied to the upper surface, but it must be exposed to rainfall during construction of the waterproofing sheet. It is important that they have excellent water resistance and low water absorption so that there is no problem even if they are used.
このようなフィルムとしてはポリエチレン、ポリエス
テル、ナイロンなどの汎用の合成樹脂フィルムをコロナ
放電処理したフィルムやエチレン−ビニルアルコール共
重合樹脂フィルム、ポリウレタン系フィルムなどがあ
る。なかでもエチレン−ビニルアルコール共重合樹脂フ
ィルムは表面処理を行なわなくともウレタン系塗膜防水
材との接着性にすぐれあわせて耐水性も良好で吸水性の
小さいフィルムであり、さらに経済性の面からも好まし
いフィルムである。しかしこのエチレン−ビニルアルコ
ール共重合樹脂フィルムはエチレンとビニルアルコール
の共重合比率によってフィルムの特性が変化するので、
適切な比率からなるフィルムを用いるのがのぞましい。
すなわちエチレンの比率が大きくなると耐水性が向上し
吸水性も小さくなるが、ウレタン系塗膜防水材との接着
性が低下する。またビニルアルコールの比率が大きくな
るとウレタン系塗膜防水材との接着性は向上するが耐水
性が低下し給水しやすくなる。このためエチレン−ビニ
ルアルコール共重合樹脂フィルムとしてはエチレン共重
合比率がモル％で約20〜80％のものが好ましく、特に好
ましくは約30〜60％のものである。フィルムの厚さとし
ては特に限定する必要はないが、経済性の面から３〜70
μ、好ましくは５〜30μが適当である。Examples of such a film include a film obtained by subjecting a general-purpose synthetic resin film such as polyethylene, polyester, and nylon to corona discharge treatment, an ethylene-vinyl alcohol copolymer resin film, and a polyurethane film. Among them, the ethylene-vinyl alcohol copolymer resin film is a film with good water resistance and good water absorption, excellent in adhesiveness with urethane-based coating waterproofing material without surface treatment, and from the economical aspect. Are also preferred films. However, since the properties of this ethylene-vinyl alcohol copolymer resin film change depending on the copolymerization ratio of ethylene and vinyl alcohol,
It is preferable to use a film having an appropriate ratio.
That is, when the ratio of ethylene is increased, the water resistance is improved and the water absorption is reduced, but the adhesiveness to the urethane-based waterproof coating material is reduced. In addition, when the ratio of vinyl alcohol is increased, the adhesiveness to the urethane-based coating film waterproofing material is improved, but the water resistance is reduced and the water is easily supplied. For this reason, the ethylene-vinyl alcohol copolymer resin film preferably has an ethylene copolymerization ratio of about 20 to 80% by mol%, particularly preferably about 30 to 60%. The thickness of the film does not need to be particularly limited, but is 3 to 70 in terms of economy.
μ, preferably 5 to 30 μ is appropriate.
また接着性向上用フィルムが積層されるシート11とし
ては通常一般的に使用されているアスファルトルーフィ
ングなどのアスファルト系やアスファルトをエラストマ
ーや合成樹脂等のポリマーで改質したポリマー改質アス
ファルト系のシートをはじめ加硫もしくは非加硫のゴム
系のシートや塩化ビニル樹脂等を用いたプラスチック系
のシートなど、汎用の合成高分子系のシートを単層もし
くは複数層積層した状態で用いることができる。またこ
れらのシート11は機械的強度、寸法安定性、接着性の向
上等の目的で、汎用の無機あるいは有機質繊維を用いた
不織布、織布などの繊維質シートからなる補強シートを
積層したシートとして使用することもできる。これらの
シートの厚みには特に限定はなく、経済性、耐久性など
の面から適宜決めることができ、通常は0.5〜4mm程度が
適当である。Further, as the sheet 11 on which the adhesiveness improving film is laminated, a commonly used asphalt-based sheet such as asphalt roofing or a polymer-modified asphalt-based sheet obtained by modifying asphalt with a polymer such as an elastomer or a synthetic resin is used. First, a general-purpose synthetic polymer-based sheet such as a vulcanized or non-vulcanized rubber-based sheet or a plastic-based sheet using a vinyl chloride resin or the like can be used in a state of being laminated in a single layer or a plurality of layers. In addition, these sheets 11 are used for the purpose of improving mechanical strength, dimensional stability, adhesiveness, etc., as a sheet obtained by laminating a reinforcing sheet made of a fibrous sheet such as a nonwoven fabric or a woven fabric using general-purpose inorganic or organic fibers. Can also be used. The thickness of these sheets is not particularly limited, and can be appropriately determined in terms of economy, durability, and the like. Usually, about 0.5 to 4 mm is appropriate.
シート11とウレタン系塗膜防水材との接着性向上フィ
ルム12との積層は例えば双方の材質にあった接着剤を用
いて行なってもよいし、またこのフィルム12にあらかじ
め接着剤として他の適当なフィルムを貼り合わせてお
き、シート11と熱圧着により積層する方法など通常広く
行なわれている積層技術により達成できる。The lamination of the sheet 11 and the adhesion improving film 12 with the urethane-based coating waterproofing material may be performed using, for example, an adhesive suitable for both materials, or another suitable adhesive may be previously applied to the film 12 as an adhesive. This can be achieved by a commonly used laminating technique such as a method of laminating such a film and laminating the sheet 11 by thermocompression bonding.
ところでコンクリートなどの下地に対して防水層が全
面にわたって接着されていると、コンクリートなどの下
地に含まれた水分が温度上昇によって気化し、その圧力
によって防水層が部分的にフクレることがあり、このよ
うな現象を回避する手段として種々の方法が可能であ
る。By the way, if the waterproof layer is adhered to the entire surface of the concrete base, the moisture contained in the concrete base evaporates due to the temperature rise, and the pressure may cause the waterproof layer to be partially blistered. Various methods are possible as means for avoiding such a phenomenon.
例えば施工現場において接着剤が点状あるいは線状の
ごとく部分的に塗布して非接着部分を連通した通気溝と
したり、防水シートの下面にあらかじめ工場で粘着剤を
点状あるいは線状のごとく部分的に塗覆し、剥離紙を積
層して巻き取り、現場で剥離紙をはがしながら貼り、粘
着剤非塗覆部分を連通した通気溝として気化水分を拡散
させ外部へ逃がす方法がある。また第１図に示したよう
に、フィルム積層シート１の下面に連通した凹溝部13を
設け、この凹溝を通気溝として気化水分を拡散させ外部
に逃がす方法もある。For example, at the construction site, an adhesive is applied partially like a dot or a line to form a ventilation groove communicating with the non-adhesive part, or the adhesive is previously applied to the lower surface of the waterproof sheet at the factory as a dot or a line. There is a method in which a coated paper is laminated, a release paper is laminated and wound, and the release paper is adhered while being peeled off at the site, and vaporized moisture is diffused as a ventilation groove communicating with the non-coated pressure-sensitive adhesive to escape to the outside. As shown in FIG. 1, there is also a method in which a concave groove portion 13 communicating with the lower surface of the film laminated sheet 1 is provided, and the concave groove is used as a ventilation groove to diffuse vaporized moisture and escape to the outside.
しかしながら現場での接着剤の部分塗布は作業者の熟
練度に大きく左右され、接着面積にバラツキを生じやす
く、所望の接着面積と通気溝（通気容積）が確保できな
い危険性がある。また防水シートにあらかじめ粘着剤を
塗覆する場合は剥離紙を積層しなければならず、施工後
の剥離紙の処分にも問題がある。However, the partial application of the adhesive at the site greatly depends on the skill of the operator, and the adhesive area is likely to vary, and there is a risk that a desired adhesive area and a ventilation groove (venting volume) cannot be secured. In the case where the pressure-sensitive adhesive is previously coated on the waterproof sheet, a release paper must be laminated, and there is a problem in disposal of the release paper after the application.
このような理由から、フィルム積層防水シート１の下
面に連通した凹溝部13を設ける。For such a reason, the groove 13 communicating with the lower surface of the film-laminated waterproof sheet 1 is provided.
本発明シートを用いた工法においては第１図に示した
ような本発明の下地防水シート１の下面に適当な接着剤
を塗布して、またはコンクリートなどの下地の方のみ
に、あるいは下地および下地防水シートの下面の両方に
接着剤を塗布して対象下地に貼着する。この時の接着剤
塗布部と非塗布部（凹溝部）との面積比は特に規定され
ないが、用いる接着剤の有する接着力により定められ
る。In the method using the sheet of the present invention, an appropriate adhesive is applied to the lower surface of the base waterproof sheet 1 of the present invention as shown in FIG. 1, or only the base such as concrete, or the base and the base An adhesive is applied to both the lower surface of the waterproof sheet and attached to the target substrate. At this time, the area ratio between the adhesive applied portion and the non-applied portion (concave groove portion) is not particularly limited, but is determined by the adhesive force of the adhesive used.
下地に対する防水層の接着力は条件によって異なる
が、少なくとも1000kg/m2以上好ましくは2000kg/m2以上
必要であることが知られている。It is known that the adhesive strength of the waterproof layer to the base varies depending on conditions, but it is required to be at least 1000 kg / m 2 or more, preferably 2000 kg / m 2 or more.
使用する接着剤の接着力が乏しすぎると接着剤塗布部
の面積を大きくとらざるを得なくなり、接着剤非塗布部
（凹溝部13）の面積が小さくなり脱気効果すなわち蒸発
気化した水蒸気を外部に導く効果が乏しくなる。このた
め脱気効果の点から連通した凹溝部13の面積は少なくと
も全平面に対し約10〜80％、好ましくは約20〜70％確保
しておくことが望ましい。所定の接着力と脱気効果が確
保できるのであれば連通した凹溝部13の深さや幅や形状
は限定されるものではないが、第３図のようなものが一
般的である。If the adhesive strength of the adhesive used is too low, the area of the adhesive-applied portion must be increased, and the area of the adhesive-unapplied portion (the concave groove portion 13) becomes smaller. The effect of leading to is poor. Therefore, from the viewpoint of the degassing effect, it is desirable that the area of the recessed groove 13 communicated with at least about 10 to 80%, preferably about 20 to 70% of the entire plane. The depth, width and shape of the communicating concave groove 13 are not limited as long as a predetermined adhesive force and a deaeration effect can be ensured, but those shown in FIG. 3 are generally used.
接着剤の機能としてはフィルム積層防水シート１を下
地に接着させるだけでなく、施工後下地の動きあるいは
亀裂が発生した時、これによって発生する防水層に作用
する外力を接着剤の適度の流動によって分散させ、防水
層の破断を防止する働きが必要であり、この目的には接
着剤よりむしろ粘着剤の方が好ましい。このような粘着
剤としてはゴムアスファルト系、ブチルゴム系、ポリイ
ソブチレン系、アクリル系などがある。The function of the adhesive is to not only bond the film laminated waterproof sheet 1 to the substrate, but also to apply an external force acting on the waterproof layer caused by the movement of the substrate or cracks caused by the appropriate flow of the adhesive when the substrate moves or cracks after the application. It is necessary to disperse and prevent the waterproof layer from breaking. For this purpose, an adhesive is preferable to an adhesive. Examples of such an adhesive include a rubber asphalt type, a butyl rubber type, a polyisobutylene type and an acrylic type.
本発明工法において塗布工程で用いられるウレタン系
塗膜防水材14としては、JIS A6021に表示されている塗
膜防水材の中のウレタン系はもちろんであるが、ウレタ
ン系塗膜防水材以外の塗膜材でもフィルム積層防水シー
ト１に積層されたフィルムと強固に接着しうる塗膜材
で、防水層を形成しうる性能をもったものであればすべ
て適用できる。The urethane-based coating waterproofing material 14 used in the coating step in the method of the present invention is, of course, urethane-based coating coating waterproofing materials indicated in JIS A6021, but coating materials other than the urethane-based coating waterproofing material. Any film material can be used as long as it is a coating material that can firmly adhere to the film laminated on the film-laminated waterproof sheet 1 and has the performance of forming a waterproof layer.
ウレタン系塗膜防水材層の塗布厚はその材料が有する
性質により決められる。また露出防水層であっても施工
後ある程度の耐歩行性が要求される場合もあり、その場
合はそのような要求に応じた塗布厚が必要とされる。The coating thickness of the urethane-based coating waterproofing material layer is determined by the properties of the material. In addition, even in the case of an exposed waterproof layer, a certain level of walking resistance may be required after construction. In such a case, a coating thickness corresponding to such a requirement is required.
ウレタン系塗膜防水材14の塗布はスプレー、ローラー
刷毛等の通常用いられている器具を用いて所定量を一度
全面塗布し、硬化後さらにその上面に所定量が全面塗布
する二度塗りで仕上げられるのが一般的である。The urethane coating waterproofing material 14 is applied once by applying a predetermined amount on the entire surface using a commonly used tool such as a spray or a roller brush. Generally, it is done.
第２図は例えばコンクリートの下地16に、下面に凹溝
部13を設けた本発明の下地防水シート１を接着剤15によ
り接着し、その上面にウレタン系塗膜防水材14が塗布さ
れて硬化して塗膜防水材層が形成されて防水施工が完了
した状態を示している。FIG. 2 shows, for example, an undercoat waterproof sheet 1 of the present invention having a concave groove 13 provided on a lower surface thereof adhered to a concrete substrate 16 with an adhesive 15, and a urethane-based waterproof film 14 is applied to the upper surface thereof and cured. This shows a state in which the waterproof coating material layer has been formed to complete the waterproofing work.
本発明のウレタン系塗膜防水材施工用下地防水シート
を用いた複合防水工法は必要に応じてコンクリートのよ
うな下地の処理工程としての作業が行なわれる。すなわ
ちコンクリートなどの下地に凹凸がある場合はこれを平
滑にし、かつ必要に応じて下地全面にプライマーを塗布
する。その後、本発明の下地防水シートをコンクリート
のような下地全面に貼着し、次いで本発明の下地防水シ
ートの上面全体にウレタン系塗膜防水材を塗布して防水
層を形成するという工程がとられる。In the composite waterproofing method using the undercoat waterproofing sheet for urethane-based coating film waterproofing material construction of the present invention, a work as a treatment step for undercoating such as concrete is performed as necessary. That is, if there is unevenness in the base such as concrete, the unevenness is smoothed, and a primer is applied to the entire surface of the base as necessary. Thereafter, the step of attaching the base waterproof sheet of the present invention to the entire surface of the base such as concrete, and then applying a urethane-based coating waterproof material on the entire upper surface of the base waterproof sheet of the present invention to form a waterproof layer is performed. Can be
（実施例） 防水下地にクロロプレン系プライマーを0.2kg/m2塗布
乾燥し、この上にブチルゴム系溶剤型粘着剤を0.4kg/m2
塗布し溶剤を揮散した。次いでこの上に後述する本発明
の下地防水シートを全面にわたって貼り、さらにこの上
にJIS A6021のウレタンゴム系塗膜防水材を1.5kg/m2、
次いで1.0kg/m2塗布し複合防水層を得た。(Example) 0.2 kg / m 2 of a chloroprene primer was applied to a waterproof substrate and dried, and a butyl rubber-based solvent-based adhesive was applied thereon at 0.4 kg / m 2.
It was applied and the solvent was evaporated. Next, a base waterproof sheet of the present invention described later is applied over the entire surface, and a JIS A6021 urethane rubber-based coating waterproofing material of 1.5 kg / m 2 ,
Next, 1.0 kg / m 2 was applied to obtain a composite waterproof layer.
本発明の下地防水シートはエチレン共重合比率44モル
％、厚み15μのエチレン−ビニルアルコール共重合樹脂
フィルムにあらかじめ接着剤として20μのポリエチレン
フィルムをウレタン系接着剤で積層しておき、これと1.
5mm厚のEPDM（エチレン−プロピレン−ジエン三元共重
合体の略）系非加硫防水シートの間にエチレン−酢酸ビ
ニル系バインダーで処理したポリエステル網状シートを
挿入して熱圧着により積層し、次いで防水シートの下面
にはシート1m2に対して3500cm2程度の面積の連続した凹
溝部を形成させたものである。なお凹溝部の形状は第３
図中の円形とした。The base waterproof sheet of the present invention has an ethylene copolymerization ratio of 44 mol%, a 20 μm polyethylene film as an adhesive previously laminated on a 15 μm thick ethylene-vinyl alcohol copolymer resin film with a urethane-based adhesive, and 1.
Insert a polyester mesh sheet treated with an ethylene-vinyl acetate binder between EPDM (abbreviation of ethylene-propylene-diene terpolymer) non-vulcanized waterproof sheet of 5 mm thickness, laminate by thermocompression bonding, and then On the lower surface of the waterproof sheet, a continuous groove having an area of about 3500 cm 2 is formed for 1 m 2 of the sheet. The shape of the concave groove is the third
The circle in the figure was used.
このようにして得られた本発明の下地防水シートを用
いることにより、本発明の下地防水シート施工後の降雨
により表面が水に濡れ一部水たまりができたが、表面の
水分をふき取るだけで乾燥時間を要することなく次の工
程のウレタン系塗膜防水材を塗布することができ施工能
率が上がった。またこのような条件下で施工された防水
層には、塗膜防水層のフクレや接着不良、さらに防水層
全体のフクレの現象は起きなかった。By using the base waterproofing sheet of the present invention thus obtained, the surface was wet by water and a partial puddle was formed due to rainfall after the installation of the base waterproofing sheet of the present invention, but it was dried only by wiping off the surface moisture. The urethane-based coating film waterproofing material of the next step could be applied without requiring time, and the construction efficiency was improved. In addition, the waterproofing layer constructed under such conditions did not cause blistering or poor adhesion of the coating waterproofing layer, and no blistering phenomenon of the entire waterproofing layer.
（効果） 本発明の下地防水シートは上面に設けられるウレタン
系塗膜防水材14との接着性が良好で耐水性にすぐれ、吸
水性の小さいフィルム12を積層してあるので、施工時に
ウレタン系塗膜防水材と下地防水シートの接着性を向上
させるような特別の処理をすることなく、また防水シー
ト施工後に降雨があっても、雨水の乾燥に時間を長くと
らずに、ウレタン系塗膜防水材塗布直前に本発明の下地
防水シートの表面にたまった水を単にふき取るだけの簡
単な作業で、次のウレタン系塗膜防水材14が塗布できる
ため施工能率が向上する。そしてフィルム12の吸水性が
極く小さいため、本発明の下地防水シートの上面にたま
った水をふき取っておけば水分による取膜のフクレもな
く良好な接着力が得られ一体化した複合防水層が得られ
る。さらに本発明の下地防水シートをコンクリート等の
下地に対して部分的に接着させることにより、コンクリ
ート等の下地の水分による防水層全体のフクレが防止で
き、全体として美観にすぐれ、そして長期間にわたって
高い防水機能を維持することができる複合防水層が得ら
れる。(Effect) Since the base waterproof sheet of the present invention has a good adhesion to the urethane-based waterproof film 14 provided on the upper surface, has excellent water resistance, and is laminated with the film 12 having a small water absorption, the urethane-based film is Urethane-based coatings without any special treatment to improve the adhesion between the coating waterproofing material and the base tarpaulin, and without having to take a long time to dry rainwater even if there is rain after the waterproofing sheet is installed. Immediately before the application of the waterproofing material, it is possible to apply the urethane-based coating film waterproofing material 14 by a simple operation of simply wiping off the water accumulated on the surface of the base waterproofing sheet of the present invention, thereby improving construction efficiency. And since the water absorption of the film 12 is extremely small, if the water accumulated on the upper surface of the base waterproof sheet of the present invention is wiped off, good adhesion is obtained without swelling of the film due to moisture, and the integrated waterproof layer is integrated. Is obtained. Further, by partially adhering the base waterproof sheet of the present invention to a base such as concrete, it is possible to prevent blistering of the entire waterproof layer due to moisture of the base such as concrete, and to provide an excellent appearance as a whole and a high level over a long period of time. A composite waterproof layer capable of maintaining the waterproof function is obtained.
また従来の塗膜防水工程においては、コンクリート等
の下地に凹凸が現われていると塗膜圧が不均一になり、
塗膜の薄い部分は破断、損傷を受けやすいことからコン
クリート等の下地の凹凸を平滑にする下地処理工程は特
に入念に行なわれているが、本発明による複合防水工法
においては、本発明の下地防水シートをコンクリート等
の下地に貼着するため、ウレタン系塗膜防水材が塗布さ
れる直前には比較的平滑な表面状態が提供されるので、
多くの場合前記の下地処理工程を省略もしくは簡略な程
度ですますことができる。In addition, in the conventional coating waterproofing process, if unevenness appears on the base such as concrete, the coating pressure becomes uneven,
Since the thin part of the coating film is easily broken and damaged, the surface treatment step for smoothing the unevenness of the foundation of concrete or the like is particularly carefully performed. However, in the composite waterproofing method according to the present invention, Since the waterproof sheet is attached to the base such as concrete, a relatively smooth surface state is provided immediately before the urethane-based waterproof film is applied.
In many cases, the above-described undercoating process can be omitted or simplified.
第１図は本発明の下地防水シートの断面図である。 第２図は本発明の下地防水シートを使用して複合防水工
法が施工された状態の一例を示す断面図である。 第３図は本発明の下地防水シートの凹溝部の形状の一例
を示す斜視図である。 1:本発明の下地防水シート 11:アスファルト系、ゴム系、又は合成樹脂系シート 12:ポリウレタンに対して接着性の高い合成樹脂フィル
ム 13:連通した凹溝 14:ウレタン系塗膜防水材 15:接着材FIG. 1 is a sectional view of a base waterproof sheet of the present invention. FIG. 2 is a cross-sectional view showing an example of a state where a composite waterproofing method has been applied using the base waterproofing sheet of the present invention. FIG. 3 is a perspective view showing an example of the shape of the concave groove portion of the base waterproof sheet of the present invention. 1: Base waterproof sheet 11 of the present invention 11: Asphalt-based, rubber-based, or synthetic resin-based sheet 12: Synthetic resin film having high adhesiveness to polyurethane 13: Connected grooves 14: Urethane-based coating waterproofing material 15: Adhesive
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭57−158464（ＪＰ，Ａ) 特開 昭55−155858（ＪＰ，Ａ) 特開 昭52−28134（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-57-158464 (JP, A) JP-A-55-155858 (JP, A) JP-A-52-28134 (JP, A)
Claims (2)
系、ゴム系又は合成樹脂系シートの上面に、ポリウレタ
ンに対して接着性の高いエチレン−ビニルアルコール共
重合樹脂フィルム又はシートを積層したことを特徴とす
るウレタン系塗膜防水材施工用下地防水シート。An ethylene-vinyl alcohol copolymer resin film or sheet having high adhesiveness to polyurethane is laminated on an upper surface of an asphalt-based, rubber-based or synthetic resin-based sheet having a concave groove communicating with a lower surface. Characterized as a base tarpaulin for urethane coating waterproofing material construction.
系シートが繊維質シートで補強されている特許請求の範
囲１項記載のウレタン系塗膜防水材施工用下地防水シー
ト。2. The underlayer waterproof sheet according to claim 1, wherein the asphalt-based, rubber-based or synthetic resin-based sheet is reinforced with a fibrous sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62305460A JP2597490B2 (en) | 1987-12-02 | 1987-12-02 | Base tarpaulin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62305460A JP2597490B2 (en) | 1987-12-02 | 1987-12-02 | Base tarpaulin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01146050A JPH01146050A (en) | 1989-06-08 |
| JP2597490B2 true JP2597490B2 (en) | 1997-04-09 |
Family
ID=17945411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62305460A Expired - Fee Related JP2597490B2 (en) | 1987-12-02 | 1987-12-02 | Base tarpaulin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2597490B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4701449B2 (en) * | 2001-06-25 | 2011-06-15 | 日豊化学産業株式会社 | Breathable composite waterproof, anticorrosion layer and its construction method |
| EP1296002A3 (en) | 2001-09-24 | 2004-02-11 | Icopal A/S | A vapour barrier or underroof for buildings |
| CN100532755C (en) | 2006-03-31 | 2009-08-26 | 田岛绿福株式会社 | Waterproof structure and waterproof construction method and used lower membrane |
| JP4629698B2 (en) * | 2007-05-10 | 2011-02-09 | 株式会社シーアールユニット | Waterproof unit, waterproof unit manufacturing method and waterproof construction method |
| JP5764418B2 (en) * | 2011-07-14 | 2015-08-19 | 株式会社秀カンパニー | Coating waterproofing method, all layers of waterproof coating formed using the method, and waterproof underlayer structure used in the method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5228134A (en) * | 1975-08-29 | 1977-03-02 | Kosei Kasei Kensetsu Kk | Method of waterproofing roof |
| JPS55155858A (en) * | 1979-05-19 | 1980-12-04 | Daiwa Kobunshi Kogyo Kk | Method of combined waterproofing of concrete surface of roof or like |
| JPS57158464A (en) * | 1981-07-16 | 1982-09-30 | Akira Kajikawa | Reinforced heat insulating and water- proof structure |
-
1987
- 1987-12-02 JP JP62305460A patent/JP2597490B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01146050A (en) | 1989-06-08 |
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