JPH07292877A - Roof under-covering material and manufacture thereof - Google Patents
Roof under-covering material and manufacture thereofInfo
- Publication number
- JPH07292877A JPH07292877A JP10760994A JP10760994A JPH07292877A JP H07292877 A JPH07292877 A JP H07292877A JP 10760994 A JP10760994 A JP 10760994A JP 10760994 A JP10760994 A JP 10760994A JP H07292877 A JPH07292877 A JP H07292877A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- acrylic resin
- roof
- layer
- waterproof
- 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.)
- Granted
Links
Landscapes
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、住宅等の勾配屋根の施
工に用いる屋根下葺材並びにその製造法に関する。更に
詳細には、住宅等の勾配屋根の屋根下葺施工を行うに当
たり、その施工時に作業者の滑り防止を向上し、安定し
た足場を確保すると共に、特に降雨の際の滑り防止を目
的とした屋根下葺材とその製造法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof underlaying material used for constructing a pitched roof of a house and the like and a method for producing the same. More specifically, when carrying out under-roof construction of a pitched roof of a house or the like, the slip prevention of the worker was improved during the construction, a stable scaffold was secured, and slip prevention especially in the case of rainfall was aimed at. Regarding under-roof material and its manufacturing method.
【０００２】[0002]
【従来の技術】従来、勾配屋根の施工には、滑り防止の
目的で、主としてアスファルトルーフィングの表面にタ
ルクや珪砂等の鉱物質粉粒を全面に付着させたものが屋
根下葺材として用いられていた。しかし、かゝるタルク
や珪砂等を付着させたものは、勾配屋根において施工す
る時、作業者が滑り易く危険であった。近年、更に、そ
の滑り止めのために改良されたいくつかの屋根下葺材が
提案されている。例えば、基材をゴムラテックスで被覆
せしめると共に、この被覆層に固形粉末をその一部が露
出するように密着させたもの（実開昭５２−１０２１３
７）、表面にドット加工した不織布にゴムアスファルト
を半含浸させると共に、その裏面にゴムアスファルト層
を配設したもの（特開平３−１４０５５２）、瀝青物質
とゴムとの混合物から成る表面被覆層中に合成樹脂、ゴ
ム等の弾性物質に発泡剤を含む突起形成材料が含有され
ており、発泡処理後凹凸のある突起を形成させるもの
（実開平４−６８１２８）、更には、発泡マイクロカプ
セルを含む弾性樹脂層を形成させたもの（特開平４−３
５３１６７）などが公知である。2. Description of the Related Art Conventionally, in the construction of pitched roofs, for the purpose of preventing slippage, a material in which mineral powder particles such as talc and silica sand are adhered to the entire surface of an asphalt roofing is mainly used as a roof underlaying material. It was However, the one to which such talc or silica sand is adhered is dangerous because a worker is slippery when constructing on a pitched roof. In recent years, several roof underlaying materials have been proposed which are further improved to prevent them from slipping. For example, a base material is coated with rubber latex, and a solid powder is adhered to the coating layer so that a part of the solid powder is exposed (Actual No. 52-10213).
7) A non-woven fabric whose surface is dot-processed is semi-impregnated with rubber asphalt, and a rubber asphalt layer is provided on the back surface thereof (JP-A-3-140552), in a surface coating layer composed of a mixture of a bituminous substance and rubber. Which contains a protrusion forming material containing a foaming agent in an elastic substance such as synthetic resin or rubber to form protrusions having unevenness after the foaming treatment (actually open flat 4-68128), and further includes foamed microcapsules. An elastic resin layer formed (Japanese Patent Laid-Open No. 4-3
53167) and the like are known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来提案の屋根下葺材の全ては、いずれも屋根下葺材の表
面が通常の乾燥状態における滑り防止を配慮したもので
あるが、その中でも、屋根下葺材を合成樹脂やゴム等の
弾性物質で作製されたものは、その弾性により、施工者
の荷重がかゝったとき、これに対してその弾性により反
撥し、却って、足場が不安定になり好ましくないことが
分かった。而も、従来の屋根下葺材の全ては、屋根下葺
施工中に雨が降り始めると、防滑効果が急激に低下し、
滑り易く危険である欠点を有することが分かった。換言
すれば、従来は、屋根下葺材につき、降雨時に対する滑
り止め防止についての配慮を全く欠き、降雨時に滑り止
め効果の対策はこれまでなされていないのが現状であ
り、その開発が望まれる。発明者は、かゝる観点より、
種々検討した。即ち、従来の屋根下葺材は、降雨により
直ちにその表面は濡れ面となり、その濡れ面、即ち水膜
の生成が降雨時に防滑効果の急激な低下の原因となるこ
とが分かった。発明者は、この知見に基づいて、乾燥状
態のときは勿論、降雨時においても水膜の生成を防止
し、大きい防滑効果が低下することなく作業者の安全を
確保することができるようにし、従来の不都合を解消
し、上記の要望を満足せしめた屋根下葺材を提供するも
のである。However, all of the above-proposed roof under-roof materials are intended to prevent slippage when the surface of the roof under-roof material is in a normal dry state. When the roofing material is made of an elastic material such as synthetic resin or rubber, when the load of the builder is increased due to its elasticity, the elasticity repels it and the scaffold becomes unstable on the contrary. It turned out to be unfavorable. In addition, all of the conventional under roofing materials, when it begins to rain during under roofing construction, the anti-slip effect drops sharply,
It has been found to have the drawback of being slippery and dangerous. In other words, the roof underlaying materials have heretofore been completely lacking in consideration for prevention of slipping in the case of rainfall, and no countermeasures against slipping in rain have been taken so far, and the development thereof is desired. From this perspective, the inventor
Various studies were conducted. That is, it has been found that the conventional under-roofing material immediately becomes a wet surface due to rainfall, and the formation of a wet film, that is, a water film, causes a rapid decrease in the anti-slip effect during rain. The inventor, based on this finding, prevents the formation of a water film not only in the dry state, but also in the case of rainfall, so that it is possible to ensure the safety of the operator without a large reduction in the slip prevention effect, The object of the present invention is to provide an under-roofing material that solves the conventional inconveniences and satisfies the above demands.
【０００４】[0004]
【課題を解決するための手段】ＪＩＳ Ｌ １０９２に
規定する撥水度７０以上であり、且つ連続発泡層から成
るアクリル樹脂主体の微多孔性シートを防水層の表層と
して設けたことを特徴とする。[Means for Solving the Problems] A water-repellent material according to JIS L 1092 having a water repellency of 70 or more and a microporous sheet mainly composed of an acrylic resin and composed of a continuous foam layer is provided as a surface layer of a waterproof layer. .
【０００５】[0005]
【作用】本発明の上記の屋根下葺材は、勾配屋根の施工
に当たり、その勾配野地板に常法により順次一部を重ね
て敷設しステープル等の釘打ち施工されるが、作業者が
該屋根下葺材の上面を歩行しても、その表面は、アクリ
ル樹脂の柔軟な発泡層材から成るため、作業者の荷重が
かゝるときは、これに順応してへこむので、従来のよう
な弾性による反発力がないため、安定した足場が確保さ
れる。これに加え、その表面は微多孔面であるので、従
来の無孔の合成樹脂シートやアスファルトルーフィング
などの表面に比し摩擦抵抗が著しく大きくなり防滑効果
が向上し、安定した施工作業の向上をもたらす。また、
特に、施工作業中の降雨時においては、その表面は上記
の撥水性を有するので、その表面に落ちた雨滴は小さい
玉となって流れ去り、その表面は濡れることがない。即
ち、水膜の生成が防止される。施工者が、その表面の雨
滴を踏んだ場合は、その下面の連続発泡層内に押し込ま
れ浸透拡散するので、その表面に水膜が生成することを
未然に防止することができる。その結果、急激な防滑効
果の低下が防止され、長時間に亘り、安定な足場を確保
し、作業を安定良好に維持できる。かくして、従来のよ
うな屋根下葺材に見られるような、その表面で雨滴は広
がり、その上を踏んだ場合は、その水滴はその表面上で
広がり、大面域の濡れ面となるため、乾燥時の防滑効果
が急激に低下し、降雨時の作業における危険を解消でき
る。一方、その表層の下面の防水層は、勾配屋根に対す
る防水を確保すると共に、釘打時の釘まわりの防水性を
確保する。該アクリル樹脂主体の連続発泡層の撥水度が
７０未満となると、その表面の濡れ性が増大し、長時間
の防滑効果の維持が困難となる。撥水度７０以上を確保
するには、撥水剤をアクリル樹脂に対し０．５〜３重量
％程度含有することにより達成される。該連続発泡層の
大部分の気孔の直径は０．００１〜０．０５ｍｍの範囲
を占めるものが好ましく、また、所々に０．２ｍｍ程度
までの気孔が散在しても差支えない。しかし乍ら、逆
に、該発泡層の大部分の気孔の直径が例えば、０．１ｍ
ｍ以上で構成するときは、微多孔性シートの気泡膜の強
度が弱くなり、その表面に受ける摩擦や衝撃で、破れて
表面に大きい凹窪を生じ易くなるので好ましくない。The above-mentioned roof underlaying material of the present invention is used for constructing a sloped roof, and by laying a part thereof on the slope base plate in order by a conventional method and nailing such as staples. Even when walking on the upper surface of the lower roofing material, the surface is made of a flexible foam layer material of acrylic resin, so when the operator's load is heavy, it will dent in conformity with this, so it will be elastic like the conventional one. Since there is no repulsive force due to, a stable foothold is secured. In addition to this, the surface is a microporous surface, so the friction resistance is significantly larger than the surface of conventional non-porous synthetic resin sheet or asphalt roofing, the anti-slip effect is improved, and stable construction work is improved. Bring Also,
In particular, at the time of rain during construction work, the surface has the above-mentioned water repellency, so that the raindrops that have fallen onto the surface run away as small balls and do not get wet. That is, the formation of a water film is prevented. When the operator steps on the raindrops on the surface, the water droplets are pushed into the continuous foamed layer on the lower surface and permeate and diffuse. Therefore, it is possible to prevent the formation of a water film on the surface. As a result, it is possible to prevent a sudden decrease in the anti-slip effect, to secure a stable scaffold for a long time, and to maintain the work stably and satisfactorily. Thus, raindrops spread on the surface, as seen in conventional under-roofing materials, and when you step on it, the water droplets spread on the surface and become a wet surface of a large area, so it is dry. The anti-slip effect at the time is drastically reduced, and the danger in work during rainfall can be eliminated. On the other hand, the waterproof layer on the lower surface of the surface layer assures waterproofness for the pitched roof and also waterproofness around the nail when nailing. If the water repellency of the acrylic resin-based continuous foam layer is less than 70, the wettability of the surface increases, and it becomes difficult to maintain the anti-slip effect for a long time. The water repellency of 70 or more can be ensured by containing a water repellent in an amount of about 0.5 to 3% by weight based on the acrylic resin. It is preferable that most of the pores of the continuous foamed layer have a diameter of 0.001 to 0.05 mm, and pores of up to about 0.2 mm may be scattered in places. However, conversely, the diameter of most of the pores of the foam layer is, for example, 0.1 m.
When it is composed of m or more, the strength of the bubble film of the microporous sheet becomes weak, and it is liable to be broken due to friction or impact applied to the surface thereof to cause large concaves on the surface, which is not preferable.
【０００６】更に、本発明は、高能率且つ安定良好に上
記の本発明の屋根下葺材を得るようにしたその製造法に
係り、アクリル樹脂に対し、撥水剤を０．５〜３重量％
含有するアクリル樹脂主体の原液を機械的に連続発泡処
理し、得られる発泡液を繊維質シートに含浸塗布し、次
でその塗布層を加熱硬化してＪＩＳ Ｌ １０９２に規
定する撥水度７０以上であり、且つ連続発泡層から成る
アクリル樹脂主体の微多孔性シートに形成し、その裏面
に防水性塗料を塗布し又は防水性シートを貼着して防水
層を設けたことを特徴とする。このように機械的発泡処
理により、大部分の気孔が約０．００１〜０．０５ｍｍ
の範囲から成る連続発泡液が得られ、また、アクリル樹
脂主体の連続発泡層を一旦繊維質シートに塗布形成した
ので、柔軟且つ強靭な取り扱い易い表層材が得られると
共に、その裏面には、各種の任意の防水層を一体に形成
できる。かくして、前記の微多孔性シートは、繊維質シ
ートに結着した塗布層から成る表層材裏面に防水性塗料
の塗布層又は防水性シートを貼着して成る本発明の屋根
下葺材が得られる。更に本発明は、更に高能率に本発明
の屋根下葺材を得るようにしたその製造法に係り、アク
リル樹脂に対し、撥水剤を０．５〜３重量％含有するア
クリル樹脂主体の原液を機械的に連続発泡処理し、得ら
れる発泡液を耐熱性の合成樹脂シート又はフィルム又は
金属箔と合成樹脂又はゴムとのラミネートシートから成
る防水性シートに塗布し、次でその塗布層を加熱硬化し
てＪＩＳ Ｌ １０９２に規定する撥水度７０以上であ
り、且つ連続発泡層から成るアクリル樹脂主体の微多孔
性シートに形成したことを特徴とする。このように、発
泡液を直接加熱硬化処理時の熱に耐える防水シートに塗
布するようにしたので、迅速に防水性シートの上面に前
記の微多孔性シートを有する本発明の屋根下葺材が得ら
れる。Furthermore, the present invention relates to a method for producing the above-mentioned under-roofing material of the present invention with high efficiency and good stability, which comprises 0.5 to 3% by weight of a water repellent agent with respect to an acrylic resin.
An acrylic resin-based stock solution is mechanically continuously foamed, the resulting foaming solution is impregnated and applied to a fibrous sheet, and the applied layer is then heat-cured to have a water repellency of 70 or more as defined in JIS L 1092 It is characterized in that it is formed on a microporous sheet mainly composed of an acrylic resin and is composed of a continuous foam layer, and a waterproof coating is applied or a waterproof sheet is attached to the back surface thereof to provide a waterproof layer. In this way, most of the pores are about 0.001-0.05mm by the mechanical foaming process.
Since a continuous foaming liquid consisting of a range of 1) is obtained, and since a continuous foaming layer mainly composed of an acrylic resin is once applied and formed on a fibrous sheet, a flexible and tough surface layer material can be obtained, and various kinds of materials are formed on the back surface thereof. Can be integrally formed. Thus, the above-mentioned microporous sheet can be obtained as a roof underlaying material of the present invention in which a coating layer of a waterproof paint or a waterproof sheet is attached to the back surface of a surface layer material comprising a coating layer bound to a fibrous sheet. . Further, the present invention relates to a method for producing the roof underlaying material of the present invention with higher efficiency, and provides an acrylic resin-based stock solution containing 0.5 to 3% by weight of a water repellent agent based on the acrylic resin. Mechanically continuous foaming treatment, apply the resulting foaming liquid to a waterproof sheet consisting of heat resistant synthetic resin sheet or film or laminated sheet of metal foil and synthetic resin or rubber, and then heat cure the coating layer. In addition, the water repellency defined by JIS L 1092 is 70 or more, and the microporous sheet is mainly made of an acrylic resin and is composed of a continuous foam layer. In this way, since the foaming liquid was directly applied to the waterproof sheet that withstands the heat during the heat curing treatment, the under roofing material of the present invention having the microporous sheet on the upper surface of the waterproof sheet was quickly obtained. To be
【０００７】上記の本発明の製造法において、該原液
は、アクリル樹脂エマルジョンを主体とし、これを１０
０重量部に対し撥水剤を０．５〜３重量部、発泡安定
剤、感熱発泡安定剤、増粘剤を夫々１〜５重量％混合し
て成るものが好ましい。これを機械的に連続発泡させ、
その発泡液の塗布層を形成するときは、所定の均一な気
孔寸法から成る連続発泡層が安定良好に得られる。ま
た、その発泡液の倍率を約２〜３倍とし、その発泡液
（アクリル樹脂固形分４０〜４５重量％）の塗布量を１
０〜１００ｇ／ｍ2 とするときは、所定の好ましい連続
発泡層が得られ且つ経済的である。就中、３０〜６０ｇ
／ｍ2 が好ましい。本発明のその他の好ましい実施態様
は、以下の実施例により詳述する。In the above-mentioned production method of the present invention, the undiluted solution is mainly composed of acrylic resin emulsion,
It is preferable that 0.5 to 3 parts by weight of a water repellent, 1 to 5% by weight of each of a foaming stabilizer, a heat-sensitive foaming stabilizer and a thickener are mixed with 0 part by weight. This is mechanically continuously foamed,
When forming the coating layer of the foaming liquid, a continuous foaming layer having a predetermined uniform pore size can be obtained stably and satisfactorily. Further, the expansion ratio of the foaming liquid is set to about 2 to 3 times, and the coating amount of the foaming liquid (acrylic resin solid content: 40 to 45% by weight) is set to 1
When it is from 0 to 100 g / m 2 , a predetermined preferable continuous foam layer can be obtained and it is economical. Above all, 30-60g
/ M 2 is preferred. Other preferred embodiments of the present invention are detailed by the following examples.
【０００８】[0008]
【実施例】本発明の屋根下葺材は、ＪＩＳ Ｌ １０９
２に規定する撥水度７０以上を有し且つ連続発泡層から
成るアクリル樹脂を主体とする微多孔性シートを表層と
し、その裏面に防水層を一体に設けた構成から成る。上
記の撥水度７０以上、一般には、７０〜９０とするに
は、アクリル樹脂に対し０．５〜３重量％程度のシリコ
ーン、パラフィンふっ素樹脂などの撥水剤を含有せしめ
ることにより達成される。撥水剤としては、シリコーン
油、シリコーングリース、シリコンゴム、シリコン樹脂
などのシリコーン、分子量の小さいパラフィン油、その
他のパラフィン、ポリクロロトリフルオロエチレンなど
のふっ素樹脂などが選択的に使用される。アクリル樹脂
としては、ポリアクリル酸メチル、ポリメタクリル酸メ
チルなどのアクリル酸エステル重合体であり、ガラス転
移点が３０〜−３０℃のものが好ましく使用される。好
ましくは、柔軟性、微粘着性及び微接着性の点からアク
リル酸メチルエステル、アクリル酸エチルエステル又は
アクリル酸ブチルエステルなどの単独又は共重合体で末
端にヒドロキシル基、カルボキシル基又はアミド基のい
ずれか１つ又はそれ以上を有するものから成る。また、
アクリル樹脂として、ビニル単量体との共重合体も使用
できる。EXAMPLE A roof underlaying material of the present invention is JIS L 109.
A microporous sheet having a water repellency of 70 or more as defined in 2 and mainly composed of an acrylic resin and composed of a continuous foam layer is used as a surface layer, and a waterproof layer is integrally provided on the back surface thereof. The water repellency of 70 or more, generally 70 to 90, can be achieved by adding about 0.5 to 3% by weight of a water repellent such as silicone or paraffin fluororesin to acrylic resin. . As the water repellent, silicone oil, silicone grease, silicone rubber, silicone resin or other silicone, paraffin oil having a small molecular weight, other paraffin, or fluororesin such as polychlorotrifluoroethylene is selectively used. The acrylic resin is preferably an acrylic acid ester polymer such as polymethyl acrylate or polymethyl methacrylate and has a glass transition point of 30 to -30 ° C. Preferably, from the viewpoints of flexibility, slight tackiness and slight adhesion, a homopolymer or a copolymer of acrylic acid methyl ester, acrylic acid ethyl ester, acrylic acid butyl ester, or the like, which has a terminal hydroxyl group, carboxyl group or amide group Or having one or more. Also,
A copolymer with a vinyl monomer can also be used as the acrylic resin.
【０００９】該連続発泡層から成るアクリル樹脂主体の
微多孔性シートの該発泡層の該発泡層の気孔の直径は約
０．００１〜０．０５ｍｍの範囲のもので実質上占める
ことが好ましく、それ以上の大径の気孔が部分的に散在
していても差支えない。しかし乍ら、該発泡層の大部分
の気孔の直径が０．１ｍｍ以上のもので実質上占めると
きは、吸水性が大きくなり過ぎ、また、気泡壁が摩擦な
どにより破壊され易く、表面に大きい凹窪を生じ好まし
くない。一方、気孔の直径が０．００１未満は、水の浸
透拡散効果を殆ど生じない。It is preferable that the diameter of the pores in the foamed layer of the microporous sheet based on an acrylic resin mainly comprising the continuous foamed layer is substantially in the range of about 0.001 to 0.05 mm, It does not matter even if the pores of larger diameter are scattered in some areas. However, when the pores of most of the foam layer have a diameter of 0.1 mm or more, the water absorbency becomes too large, and the bubble wall is easily broken by friction or the like, resulting in a large surface area. It is not preferable because it causes depressions. On the other hand, when the diameter of the pores is less than 0.001, almost no water permeation diffusion effect occurs.
【００１０】該防水層は、アスファルト、ゴムアスファ
ルト、ゴム系塗料、合成樹脂系塗料から選んだ防水性塗
料の塗布層、又はアスファルトルーフィング、合成樹脂
シート、合成樹脂フィルム、ゴムシート、金属箔と合成
樹脂又はゴムとのラミネートシート、繊維質シートに前
記の所望の防水性塗料を含浸して成るシートから選んだ
防水シートで構成することが好ましい。該アスファルト
としては、例えばＪＩＳ Ｋ ２２０７（石油アスファ
ルト）に規定するブローンアスファルト、又は防水工事
用アスファルトが用いられる。該ゴムアスファルトとし
ては、例えばストレートアスファルトに、スチレン系合
成ゴムを加えて改質したものが挙げられる。その使用量
は、アスファルトに対して５〜１５重量％が好ましく、
その結果、アスファルトにゴム弾性を付与することがで
き、特に低温時においても弾力性を維持することができ
る。該スチレン系合成ゴムとしては、スチレン・ブタジ
エンゴム、スチレン・ブタジエン・スチレンゴム、スチ
レン・イソプレン・スチレンゴム、スチレン・エチレン
・ブチレン・スチレンゴムなどが挙げられ、いずれも好
適に使用することができる。該ゴム系塗料としては、ス
チレン・ブタジエンゴム、クロロプレンゴム、クロロス
ルホン化ポリエチレンゴム、ポリウレタンゴム、ブチル
ゴム、イソプレンゴムなどが挙げられる。また、該合成
樹脂系塗料としては、ポリ塩化ビニル樹脂、エチレン−
酢酸ビニル共重合樹脂、ポリエステル樹脂、ポリオレフ
ィン樹脂などが挙げられる。該防水性シートとしては、
防水性塗料含浸シート、アスファルトルーフィング、合
成樹脂シート、合成樹脂フィルム、ゴムシート、金属箔
と合成樹脂又はゴムとのラミネートシートなどが挙げら
れる。The waterproof layer is a coating layer of a waterproof paint selected from asphalt, rubber asphalt, rubber-based paint, synthetic resin-based paint, or synthetic with asphalt roofing, synthetic resin sheet, synthetic resin film, rubber sheet, metal foil. It is preferable to use a laminated sheet of resin or rubber, or a waterproof sheet selected from a sheet obtained by impregnating a fibrous sheet with the desired waterproof coating material. As the asphalt, for example, blown asphalt specified in JIS K 2207 (petroleum asphalt) or asphalt for waterproofing work is used. Examples of the rubber asphalt include straight asphalt modified with styrene synthetic rubber. The amount used is preferably 5 to 15% by weight with respect to the asphalt,
As a result, rubber elasticity can be imparted to the asphalt, and elasticity can be maintained even at low temperatures. Examples of the styrene synthetic rubber include styrene / butadiene rubber, styrene / butadiene / styrene rubber, styrene / isoprene / styrene rubber, styrene / ethylene / butylene / styrene rubber, and any of them can be preferably used. Examples of the rubber coating material include styrene / butadiene rubber, chloroprene rubber, chlorosulfonated polyethylene rubber, polyurethane rubber, butyl rubber, isoprene rubber and the like. Further, as the synthetic resin-based paint, polyvinyl chloride resin, ethylene-
Examples thereof include vinyl acetate copolymer resin, polyester resin and polyolefin resin. As the waterproof sheet,
Examples include waterproof paint impregnated sheets, asphalt roofing, synthetic resin sheets, synthetic resin films, rubber sheets, and laminated sheets of metal foil and synthetic resin or rubber.
【００１１】本発明の該屋根下葺材の該微多孔性シート
は、繊維質シートに形成した塗布層から成るか耐熱性の
防水性シートに直接形成した塗布層から成るかのいずれ
かである。この場合、該繊維質シートは、天然繊維、無
機繊維又は有機合成繊維の単独又は混合繊維から成る織
布、不織布又は編布である。The microporous sheet of the under roofing material of the present invention is either a coating layer formed on a fibrous sheet or a coating layer directly formed on a heat resistant waterproof sheet. In this case, the fibrous sheet is a woven fabric, a non-woven fabric, or a knitted fabric composed of natural fibers, inorganic fibers, or organic synthetic fibers, either alone or mixed.
【００１２】次に、本発明の上記の屋根下葺材の製造法
の実施例につき説明する。本発明によれば、上記の撥水
性を有し且つそのアクリル樹脂の連続発泡層から成る微
多孔性シートを作製するには、例えば、アクリル酸エス
テル系重合体の水性エマルジョンを用いる。好ましく
は、柔軟性、微粘着性を有するアクリル酸メチルエステ
ル、アクリル酸エチルエステル又はアクリル酸メチル酸
ブチルエステル等の適宜共重合体樹脂で末端にヒドロキ
シル基、カルボキシル基又はアミド基のいずれか又は複
合して有するものを使用する。該アクリル樹脂の水性エ
マルジョン（固形分約４０重量％）を主体とし、例え
ば、これを１００重量部に対し、撥水剤を０．５〜３重
量部、発泡安定剤、感熱発泡安定剤及び増粘剤を夫々１
〜５重量部当たり添加し、混合して成るアクリル樹脂原
液を使用する。このアクリル樹脂を主体とする原液を、
公知の連続発泡機により、例えば、スエヒロ連続発泡機
を使用し、その容器内に１側より一定の流量、例えば３
Ｋｇ／ｍｉｎで投入し、例えば、６００ｒ．ｐ．ｍで高
速回転により撹拌する一方、ホースを介して圧搾空気を
発泡状況を観察し乍ら適時、その送気量を調節して吹き
込み、所望の発泡倍率まで発泡させ、他側よりその発泡
液を吐出させる。このようにしてアクリル樹脂主体の発
泡液を調製する。次でこの発泡液を、広幅、長尺の繊維
質シートの移行途上において、その上面にロールコータ
ーにより均一な厚さに含浸塗布し、次でオーブンに導入
し、その塗布層を加熱、硬化させる。このようにして、
その繊維シートの繊維間隙に該発泡層の下部が喰い込み
結着した柔軟且つ強靭な微多孔性シートから成る表層材
として得られるので、その後の取り扱いが容易で、次の
その下面に防水層を形成する作業に便利である。また、
これを、施工現場に搬送し、その場で防水性シートの上
面に貼着して本発明の屋根下葺材を完成するようにして
も良い。Next, an embodiment of the method for manufacturing the above-mentioned under-roof material of the present invention will be described. According to the present invention, an aqueous emulsion of an acrylate polymer is used, for example, to produce the microporous sheet having the above-mentioned water repellency and a continuous foam layer of the acrylic resin. Preferably, a copolymer resin such as acrylic acid methyl ester, acrylic acid ethyl ester or acrylic acid methyl acid butyl ester having flexibility and slight adhesiveness is a hydroxyl group at the terminal, a carboxyl group or an amide group or a composite Use what you have. The aqueous emulsion of the acrylic resin (solid content: about 40% by weight) is mainly used. For example, 0.5 to 3 parts by weight of a water-repellent agent, a foaming stabilizer, a heat-sensitive foaming stabilizer and an additive are added to 100 parts by weight of the emulsion. 1 stick each
An acrylic resin stock solution which is added and mixed per 5 parts by weight is used. Stock solution mainly composed of this acrylic resin,
With a known continuous foaming machine, for example, a Suehiro continuous foaming machine is used, and a constant flow rate from one side, for example, 3
It is charged at Kg / min and, for example, 600 r. p. While stirring by high-speed rotation at m, while observing the foaming condition through a hose and observing the foaming condition, the air supply amount is adjusted and blown to foam to a desired foaming ratio, and the foamed liquid is blown from the other side. Discharge. In this way, a foaming liquid mainly containing acrylic resin is prepared. Next, this foaming liquid is impregnated and applied on the upper surface of the wide and long fibrous sheet to a uniform thickness by a roll coater, and then introduced into an oven to heat and cure the applied layer. . In this way
Since it can be obtained as a surface layer material composed of a flexible and tough microporous sheet in which the lower part of the foam layer is embedded and bonded in the fiber gap of the fiber sheet, subsequent handling is easy, and a waterproof layer is formed on the lower surface of the next layer. It is convenient for forming work. Also,
This may be transported to a construction site and attached to the upper surface of the waterproof sheet on the spot to complete the under-roof material of the present invention.
【００１３】該繊維質シートとしては、織布、不織布又
は編布から選択使用される。その繊維としては、木綿、
麻などの天然繊維、ガラス繊維、炭素繊維などの無機繊
維又はポリエステル、ビニロン、ナイロン、アクリル、
ポリ塩化ビニル、ポリオレフィンなどの合成繊維の単独
又は混合繊維から成るものを適宜選択して使用する。ま
た、これらのラミネート布、例えば、織布と不織布を貼
り合わせたものも使用できる。尚また、不織布として
は、抄紙を含み、抄紙として、経済的には、通常のアス
ファルトルーフィング用の芯材として使用されている各
種のボロ、故紙などから作製されるラグ紙が適当であ
る。以上の各種の繊維質シートのうち、寸法安定性及び
耐腐蝕性において特に優れているポリエステル合成繊維
の不織布やガラス繊維の不織布を使用することが好まし
い。As the fibrous sheet, a woven cloth, a non-woven cloth or a knitted cloth is selected and used. The fibers are cotton,
Natural fibers such as hemp, glass fibers, inorganic fibers such as carbon fibers or polyester, vinylon, nylon, acrylic,
A synthetic fiber such as polyvinyl chloride or polyolefin, which is used alone or as a mixed fiber, is appropriately selected and used. In addition, these laminated cloths, for example, those obtained by laminating a woven cloth and a non-woven cloth can also be used. Further, the non-woven fabric includes paper making, and as the paper making, economically suitable is rug paper made from various kinds of rags, waste paper and the like which are used as core materials for ordinary asphalt roofing. Among the various fibrous sheets described above, it is preferable to use a nonwoven fabric of polyester synthetic fiber or a nonwoven fabric of glass fiber which is particularly excellent in dimensional stability and corrosion resistance.
【００１４】該繊維質シートにより下面を支持された該
アクリル樹脂主体の連続発泡層の塗布層から成る微多孔
性シートの下面に一体に形成される防水層は、アスファ
ルト、ゴムアスファルト、ゴム系塗料、合成樹脂系塗料
から選んだ防水性塗料の塗布層又は防水性塗料含浸シー
ト、アスファルトルーフィング、合成樹脂シート、合成
樹脂フィルム、金属箔と合成樹脂又はゴムのフィルムと
のラミネートなどから選んだ防水性シートである。これ
ら防水シートは、その材料により適宜選択されるが、防
水性シートの場合は、シート表面の加熱熔融或いは感熱
又は感圧接着剤、有機又は無機接着剤を介して該微多孔
性シートの裏面に結着し一体とする。The waterproof layer integrally formed on the lower surface of the microporous sheet composed of the coating layer of the acrylic resin-based continuous foam layer whose lower surface is supported by the fibrous sheet is asphalt, rubber asphalt, or rubber-based paint. , Waterproof layer selected from synthetic resin-based coatings or waterproof coating impregnated sheet, asphalt roofing, synthetic resin sheet, synthetic resin film, waterproof property selected from laminate of metal foil and synthetic resin or rubber film, etc. It is a sheet. These waterproof sheets are appropriately selected depending on the material thereof. However, in the case of a waterproof sheet, it is applied to the back surface of the microporous sheet via heat-melting of the sheet surface or a heat-sensitive or pressure-sensitive adhesive, an organic or inorganic adhesive. Bind and become one.
【００１５】上記の製造法に代え、その製造を更に高能
率に行うには、前記の発泡液を直接前記のオーブンによ
る加熱、硬化するに当たり、その熱に耐えられる例えば
ＥＰＴゴム又はブチルゴムなどのゴム製シートの上面
に、そのシートの移行途上で、ロールコーターにより塗
布し、次でオーブンに導き、加熱、硬化させることによ
り、簡単且つ安価に本発明の屋根下葺材が得られる。In order to carry out the production more efficiently instead of the above production method, a rubber such as EPT rubber or butyl rubber which can withstand the heat when the foaming liquid is directly heated and cured in the oven. The under roofing material of the present invention can be easily and inexpensively obtained by applying it to the upper surface of the sheet by a roll coater while the sheet is being transferred, then introducing it to an oven, heating and curing it.
【００１６】上記の機械的発泡において、その発泡倍率
を４倍以上とするときは、気泡が大きくなり、微細且つ
均一な連続発泡が得られなくなる傾向があるので、その
発泡倍率は約２〜３倍の範囲が一般であり且つ好まし
い。In the above-mentioned mechanical foaming, when the foaming ratio is set to 4 times or more, the bubbles tend to become large and it becomes difficult to obtain fine and uniform continuous foaming, so that the foaming ratio is about 2-3. A double range is common and preferred.
【００１７】また、上記の発泡液の塗布量は、１０〜１
００ｇ／ｍ2 の範囲が好ましく、就中、３０〜６０ｇ／
ｍ2 が特に好ましい。１０ｇ／ｍ2 未満では連続発泡層
が薄すぎ、１００ｇ／ｍ2 を越えても効果は変わらない
が、経済上の見地から、この程度にとゞめる。The amount of the foaming liquid applied is 10 to 1
The range of 00 g / m 2 is preferable, and above all, 30 to 60 g / m 2.
m 2 is particularly preferred. If it is less than 10 g / m 2 , the continuous foam layer is too thin, and if it exceeds 100 g / m 2 , the effect is not changed, but from the economical point of view, it is limited to this level.
【００１８】このようにして得られた本発明の屋根下葺
材は、公知の施工手段により、住宅などの勾配屋根の下
地板面に敷設施工されるが、その表面は、柔軟なアクリ
ル樹脂の連続発泡層の微多孔性表面で形成されているの
で、作業者の荷重に対し弾性反撥なしに順応し、柔軟に
受容すると共に、後記する如く、摩擦抵抗が極めて大き
く防滑効果が著しく向上し、安定した足場を保ち、施工
作業が不安なくできる。この摩擦抵抗の増大は、その表
面が微多孔性面であることの他、アクリル樹脂の有する
微粘着性も寄与していると思われる。The roof underlaying material of the present invention thus obtained is laid by a known construction means on a base plate surface of a pitched roof of a house or the like, and the surface thereof is made of a continuous flexible acrylic resin. Since it is formed by the microporous surface of the foam layer, it adapts to the load of the operator without elastic repulsion and accepts it flexibly, and as will be described later, the friction resistance is extremely large and the anti-slip effect is significantly improved and stable. You can maintain the scaffolding and do not worry about the construction work. It is considered that this increase in frictional resistance contributes not only to the surface being a microporous surface but also to the slight adhesiveness of the acrylic resin.
【００１９】特に、本発明の屋根下葺材の注目すべき特
性は、降雨時にその表面に水膜の生成を防止し、上記の
大きい防滑効果を維持することである。Particularly noteworthy characteristics of the under-roofing material of the present invention are that it prevents the formation of a water film on its surface during rainfall and maintains the above-mentioned great anti-slip effect.
【００２０】次に、本発明の実施例を比較例と共に詳述
する。 実施例１ 目付量１５０ｇ／ｍ2 のポリエステル長繊維製ニードル
パンチ不織布から成る支持シートの上面に、後述の組織
から成るアクリル樹脂を主体とする原液を連続発泡機に
より後述するように発泡処理して調製した発泡倍率３倍
のアクリル樹脂発泡液（固形分約４０％）を、９０ｇ／
ｍ2 の割合でロールコーターにより均一に含浸、塗布
し、オーブン内で１３５〜１４０℃の範囲で加熱硬化し
て該不織布の繊維間に喰い込み結着したアクリル樹脂の
連続発泡層から成る厚さ０．５ｍｍの微多孔性シートを
作製した。この連続発泡層の気泡の孔径は、３００倍の
拡大写真で読み取った限りでは、最小０．００１ｍｍ、
最大０．２ｍｍであり、その発泡層を形成する大部分の
気泡の孔径は、０．００８〜０．０５ｍｍの範囲を占め
ていた。次に、このようにして得られた不織布によりバ
ックアップ支持された該アクリル樹脂の連続発泡層から
成り且つＪＩＳ Ｌ １０９２に規定の撥水度８０を有
する微多孔性シートを表層材とし、その裏面に、芯材の
両面にゴムアスファルトを、２，０００ｇ／ｍ2 の割合
で含浸塗覆して成るゴムアスファルト防水シートを熱融
着法で貼り合わせて、全体の厚さ２．５ｍｍの防水性を
備えた屋根下葺材を得た。上記のアクリル樹脂主体の原
液は、次のように調製したものである。即ち、日本アク
リル化学社製アクリル樹脂（ポリアクリル酸メチル）の
エマルジョンＪＮ−３３（固形分４０重量％）を１００
重量部を主体とし、これに撥水剤として信越化学社製シ
リコーンエマルジョン（固形分５０％）を１重量部、発
泡安定剤として、サンノプコ社製サンノプコＤＣ１００
−Ａを３重量部、増粘剤として、日本アクリル化学社製
ＡＳＥ−６０を３重量部、同じく増粘剤として８％アン
モニア水溶液を４重量部の配合割合から成るもので、こ
れらを連続発泡機の円筒容器内に順次投入して高速回転
により撹拌し、均一に混合して得られたアクリル樹脂主
体の原液に、その回転撹拌下で空気吹込用パイプを介し
て空気を所定の供給速度で強制的に送り込み、連続発泡
処理を行い所定の発泡倍率のアクリル樹脂発泡液を得る
ようにした。発泡倍率は、目盛付き直径１０ｃｍの円筒
容器に、発泡前の原液５００ｇを注入した時の高さを測
定し、その高さに対比して、同じ重量の発泡液を注入し
た時の高さを測定し、これを発泡倍率とした。 実施例２ 目付量１００ｇ／ｍ2 のポリエステル繊維製織布から成
る支持シートの上面に、実施例１において調製したアク
リル樹脂主体の原液を、連続発泡機により、送気量と回
転撹拌速度を調節して発泡処理して得た発泡倍率２．５
倍のアクリル樹脂発泡液を、６０ｇ／ｍ2 の割合でロー
ルコーターにより均一に塗布し、実施例１と同様に、オ
ーブンにより加熱、硬化して該織布の繊維間に喰い込み
結着したアクリル樹脂の連続発泡層から成る微多孔性シ
ートを作製した。この連続発泡層の気泡の孔径は、最小
０．００２ｍｍ、最大０．１８ｍｍであり、その大部分
は、０．００６〜０．０３６ｍｍの範囲を占めていた。
次に、このようにして得られた屋根下葺用表層材の裏面
に、アスファルトに対してスチレン・ブタジエン・スチ
レンゴムを８．５重量％混合したゴムアスファルトから
成る防水性塗料を１，０００ｇ／ｍ2 の割合で塗覆し、
更に、このゴムアスファルト防水塗層の外面全面に珪砂
微粉粒を散着して粘着防止層を形成して、全体として厚
さ１．７ｍｍの屋根下葺材を得た。 実施例３ 目付量７０ｇ／ｍ2 のガラス繊維から成る不織布の上面
に、実施例１において調製したアクリル樹脂主体の原液
を、連続発泡機により送気量と回転撹拌速度を調節して
発泡処理して得た発泡倍率２倍のアクリル樹脂発泡液
を、ロールコーターにより６０ｇ／ｍ2 の割合で塗布
し、実施例１と同様に、オーブンにより加熱、硬化させ
て該不織布により補強したアクリル樹脂の連続発泡層か
ら成る微多孔性シートを作製した。この連続発泡層の気
泡の孔径は、最小０．００１ｍｍ、最大０．１５ｍｍで
あり、大部分は、０．００５〜０．００２ｍｍの範囲を
占めていた。次に、このようにして得られた屋根下葺用
表層材の裏面に、防水性塗料としてスチレン・ブタジエ
ンゴムラテックス（固形分５５重量％）を、１，２００
ｇ／ｍ2 の割合で塗覆し、加熱乾燥してその防水性塗膜
から成る防水層を形成し、全体の厚さ１．０ｍｍの屋根
下葺材を得た。 実施例４ 目付量２５０ｇ／ｍ2 のアスファルトルーフィング原紙
に、４００ｇ／ｍ2 の割合でゴムアスファルトを含浸せ
しめて成る防水シートから成る支持シートの上面に、実
施例１において調製したアクリル樹脂主体の原液を、連
続発泡機により送気量と回転撹拌速度を調節して発泡処
理して得た発泡倍率２倍のアクリル樹脂発泡液（固形分
約４０％）を、７０ｇ／ｍ2 の割合で塗布し、実施例１
と同様に加熱、硬化して該ゴムアスファルト含浸防水シ
ートの上面にアクリル樹脂の連続発泡層から成る防水性
を有する微多孔性シートを一体に結着して一挙に屋根下
葺材を得た。この連続発泡層の気泡の孔径は、最小０．
００１ｍｍ、最大０．１７ｍｍであり、大部分は、０．
００８〜０．０２５ｍｍの範囲を占めていた。 実施例５ 厚さ１ｍｍのＥＰＴゴムシート（防水シート）の上面
に、実施例１において調整したアクリル樹脂主体の原液
を、連続発泡機により送気量と回転撹拌速度を調節して
発泡処理して得た発泡倍率３倍のアクリル樹脂発泡液
を、ロールコーターにより１００ｇ／ｍ2 の割合で塗布
し、実施例１と同様に、オーブンにより加熱、硬化させ
てアクリル樹脂の連続発泡層から成る微多孔性シートを
表面に形成した全体の厚さ１．２ｍｍの屋根下葺材を得
た。この場合の連続発泡層の気泡の孔径は、最小０．０
０２ｍｍ、最大０．２ｍｍであり、大部分は、０．００
８〜０．０５ｍｍの範囲を占めていた。 比較例１ 撥水剤を添加しない以外は、実施例１と同じアクリル樹
脂主体の原液を用い、実施例１と同様にして屋根下葺材
を得た。 比較例２ アクリル樹脂エマルジョン（固形分４０重量％）を発泡
処理することなくそのまゝ目付量５０ｇ／ｍ2 のポリエ
ステル繊維から成るスパンボンド不織布の上面に、８５
ｇ／ｍ2 の割合でロールコーターにより塗布し、実施例
１と同様にオーブンに入れ加熱、硬化させ、該不織布で
支持された無孔性のアクリル樹脂塗層から成る屋根下葺
用表層材を作製した。次で、その裏面に、実施例１と同
様にしてゴムアスファルトシートを熱融着により貼着し
て屋根下葺材を得た。 比較例３ 実施例１において使用したアクリル樹脂エマルジョン
を、ウレタン樹脂エマルジョンに代えてウレタン樹脂主
体の原液を調製した以外は、実施例１と同様に実施し
て、ウレタン樹脂発泡液を該不織布に同様に塗布、加熱
硬化させて該不織布に支持されたウレタン樹脂の連続発
泡層から成る微多孔性シートを作製し、その裏面にゴム
アスファルトシートから成る防水層を熱融着により貼り
合わせて、防水層を一体に形成して屋根下葺材を得た。
該ウレタン樹脂の連続発泡層の気泡は極めて大きく、破
壊し易く安定性が悪かった。また、そのコーティング加
工時及び乾燥工程で気孔が潰れて、全体としての気孔の
数が減り、無孔の個所も多数認められた。気孔の直径
は、０．３ｍｍ以上が大部分を占めていた。換言すれ
ば、アクリル樹脂を原料とするに等しい均一な微多孔性
の連続発泡層は得られなかった。 比較例４ ラグ原紙から成る芯材にアスファルトを含浸させ、その
両面に、アスファルトを均一に含浸塗覆し、その表面に
すべり止め用にタルクを全面に均一に散着して従来公知
の屋根下葺材を作製した。Next, examples of the present invention will be described in detail together with comparative examples. Example 1 On the upper surface of a support sheet made of a needle punched nonwoven fabric made of polyester filament having a basis weight of 150 g / m 2 , a stock solution mainly composed of an acrylic resin having a structure described below was foamed by a continuous foaming machine as described below. 90 g of the prepared acrylic resin foaming liquid having a foaming ratio of 3 times (solid content: about 40%)
A thickness composed of a continuous foamed layer of acrylic resin which is uniformly impregnated and applied by a roll coater at a ratio of m 2 and is heat-cured in an oven at a temperature of 135 to 140 ° C. to be embedded and bound between fibers of the nonwoven fabric. A 0.5 mm microporous sheet was prepared. The pore size of the bubbles in this continuous foam layer is 0.001 mm at the minimum as far as it can be read in a 300 times enlarged photograph.
The maximum diameter was 0.2 mm, and the pore diameters of most of the bubbles forming the foam layer were in the range of 0.008 to 0.05 mm. Next, a microporous sheet comprising a continuous foamed layer of the acrylic resin backed up and supported by the non-woven fabric thus obtained and having a water repellency of 80 specified in JIS L 1092 was used as a surface layer material, and the back surface thereof was , A rubber asphalt waterproof sheet made by impregnating and coating rubber asphalt on both sides of the core material at a rate of 2,000 g / m 2 is attached by a heat fusion method to provide a waterproofness of 2.5 mm in total thickness. I got the roofing material. The acrylic resin-based stock solution was prepared as follows. That is, 100% of the emulsion JN-33 (solid content 40% by weight) of acrylic resin (polymethyl acrylate) manufactured by Nippon Acrylic Chemical Co., Ltd.
1 part by weight of a silicone emulsion manufactured by Shin-Etsu Chemical Co., Ltd. (solid content: 50%) as a water repellent, and San Nopco DC100 manufactured by San Nopco as a foam stabilizer.
3 parts by weight of A, 3 parts by weight of ASE-60 manufactured by Nippon Acrylic Chemical Co., Ltd. as a thickening agent, and 4 parts by weight of 8% aqueous ammonia solution as a thickening agent. Acrylic resin-based undiluted solution obtained by mixing the mixture into a cylindrical container of a machine by high speed rotation and stirring uniformly, and then air is supplied at a predetermined supply rate through the air blowing pipe under the rotational stirring. The acrylic resin foaming liquid having a predetermined expansion ratio was obtained by forcedly feeding and performing continuous foaming treatment. For the expansion ratio, measure the height when 500 g of the stock solution before foaming was poured into a cylindrical container with a scale and a diameter of 10 cm, and compare the height with the height when the same weight of foaming solution was poured. It was measured and this was taken as the expansion ratio. Example 2 On the upper surface of a support sheet made of polyester fiber woven fabric having a basis weight of 100 g / m 2 , the acrylic resin-based stock solution prepared in Example 1 was adjusted by a continuous foaming machine to adjust the amount of air supplied and the rotational stirring speed. And a foaming ratio of 2.5
A double acrylic resin foaming liquid was evenly applied at a rate of 60 g / m 2 by a roll coater, and heated and cured in an oven in the same manner as in Example 1 to bury and bond between the fibers of the woven fabric. A microporous sheet consisting of a continuous foam layer of resin was prepared. The pore diameter of the cells of this continuous foam layer was 0.002 mm at the minimum and 0.18 mm at the maximum, and most of them occupied the range of 0.006 to 0.036 mm.
Then, on the back surface of the thus obtained surface material for roof underlayment, a waterproof coating material made of rubber asphalt in which styrene / butadiene / styrene rubber was mixed in an amount of 8.5% by weight with respect to 1,000 g / paint at a ratio of m 2 ,
Further, fine particles of silica sand were dispersed on the entire outer surface of this rubber asphalt waterproof coating layer to form an anti-adhesion layer, and a roof underlaying material having a total thickness of 1.7 mm was obtained. Example 3 The acrylic resin-based stock solution prepared in Example 1 was foamed on the upper surface of a non-woven fabric made of glass fiber having a basis weight of 70 g / m 2 by adjusting the air supply amount and the rotary stirring speed with a continuous foaming machine. The resulting acrylic resin foaming liquid having a foaming ratio of 2 was applied by a roll coater at a rate of 60 g / m 2 , and the continuous acrylic resin reinforced by the nonwoven fabric was heated and cured in the same manner as in Example 1. A microporous sheet consisting of a foam layer was prepared. The pore diameter of the cells of this continuous foam layer was 0.001 mm at the minimum and 0.15 mm at the maximum, and most of them occupied the range of 0.005 to 0.002 mm. Next, 1,200 styrene / butadiene rubber latex (solid content: 55% by weight) was applied as a waterproof coating on the back surface of the thus obtained roof underlaying surface material.
It was coated at a rate of g / m 2 and dried by heating to form a waterproof layer composed of the waterproof coating film, and a roof underlaying material having a total thickness of 1.0 mm was obtained. Example 4 An acrylic resin-based stock solution prepared in Example 1 was placed on the upper surface of a support sheet made of a waterproof sheet obtained by impregnating asphalt roofing base paper having a basis weight of 250 g / m 2 with rubber asphalt at a rate of 400 g / m 2. An acrylic resin foaming liquid (solid content: about 40%) having a foaming ratio of 2 times obtained by performing foaming treatment by controlling the amount of air supplied and the rotational stirring speed with a continuous foaming machine was applied at a rate of 70 g / m 2. Example 1
In the same manner as in (1) and (2) above, a microporous sheet having a waterproof property composed of a continuous foamed layer of acrylic resin was integrally bound to the upper surface of the rubber asphalt-impregnated waterproof sheet to integrally obtain a roof underlaying material. The pore size of the bubbles in this continuous foam layer is at least 0.
001 mm, maximum 0.17 mm, most of which is 0.
It occupied the range of 008-0.025 mm. Example 5 On the upper surface of an EPT rubber sheet (waterproof sheet) having a thickness of 1 mm, the acrylic resin-based stock solution prepared in Example 1 was subjected to a foaming treatment by a continuous foaming machine while controlling the air supply amount and the rotational stirring speed. The obtained acrylic resin foaming liquid having a foaming ratio of 3 times was applied with a roll coater at a rate of 100 g / m 2 , and heated and cured in an oven in the same manner as in Example 1 to form a microporous layer composed of a continuous foamed layer of acrylic resin. An under-roof material having a total thickness of 1.2 mm and having a heat-resistant sheet formed on the surface was obtained. In this case, the pore size of cells in the continuous foam layer is 0.0
02 mm, maximum 0.2 mm, mostly 0.00
It occupied the range of 8 to 0.05 mm. Comparative Example 1 A roof underlayment material was obtained in the same manner as in Example 1, except that the same acrylic resin-based stock solution as in Example 1 was used except that the water repellent was not added. Comparative Example 2 An acrylic resin emulsion (solid content: 40% by weight) was applied to the upper surface of a spunbonded non-woven fabric made of polyester fiber having a weight per unit area of 50 g / m 2 without foaming treatment.
A coating material for a roof underlay was applied at a ratio of g / m 2 by a roll coater, placed in an oven as in Example 1 to be heated and cured, and a non-porous acrylic resin coating layer supported by the non-woven fabric was used for a roof understory material. It was made. Then, a rubber asphalt sheet was attached to the back surface thereof by heat fusion in the same manner as in Example 1 to obtain a roof underlaying material. Comparative Example 3 The same procedure as in Example 1 was repeated except that the urethane resin emulsion was used instead of the acrylic resin emulsion used in Example 1 to prepare a urethane resin-based stock solution, and the urethane resin foam was used in the same manner as the nonwoven fabric. A microporous sheet composed of a continuous foamed layer of urethane resin supported on the non-woven fabric by coating and heat curing is prepared, and a waterproof layer composed of a rubber asphalt sheet is attached to the back surface by heat fusion to form a waterproof layer. Was integrally formed to obtain an under-roof material.
The bubbles in the continuous foamed layer of the urethane resin were extremely large, were easily broken, and had poor stability. Further, during the coating process and during the drying process, the pores were crushed, the number of pores as a whole was reduced, and many non-pores were also found. Most of the pore diameters were 0.3 mm or more. In other words, it was not possible to obtain a uniform microporous continuous foamed layer obtained by using an acrylic resin as a raw material. Comparative Example 4 A core material made of rug base paper was impregnated with asphalt, both sides of which were uniformly coated with asphalt, and talc was evenly spread over the entire surface to prevent slippage. Was produced.
【００２１】次に、これら実施例及び比較例の屋根下葺
材につき、夫々の表面の乾燥時と湿潤時の摩擦抵抗性、
即ち、滑りにくさの試験を次のように行い、その夫々の
摩擦係数を求めた。即ち、５寸勾配の斜面に夫々の屋根
下葺材の試料を貼り付け、鋼製の錘（幅１０ｃｍ、長さ
２０ｃｍ、高さ３ｃｍ、重さ５Ｋｇ）を上面に貼り付け
たＪＩＳ Ｓ ５００７に規定するくつ用ゴム底（重さ
０．１Ｋｇ）を各試料の上面に載置し、引張試験機で錘
の付いたくつ用ゴム底を５００ｍｍ／分の引張速度で該
試料の斜面上を１００ｍｍ移動させ、チャートよりこの
間の最大荷重と最小荷重を読み取り、その平均引張荷重
を測定した。この試験を夫々の試料全面を一定量の水で
湿らせた状態でも行った。その各測定値と、錘と靴底と
の上記の重量値とを下記式のＴとＷに代入し、夫々の試
料の摩擦係数μを求めた。即ち、μ＝Ｔ／（Ｗ・ｃｏｓ
α）＋ｔａｎα、但、Ｔは平均引張荷重、Ｗは錘と靴底
の重量である。茲で、傾斜は５寸勾配であるから、μ＝
２６．３４°となり、従って、ｃｏｓα＝０．８９４、
ｔａｎα＝０．５００である。従って、μ＝Ｔ／（５．
１×０．８９４）＋０．５００で表される。この式に、
夫々の試料について測定した平均引張荷重（Ｔ）値を代
入し、夫々の試料の摩擦係数μを求めた。その結果は、
下記表１、表２に示す通りである。Next, with respect to the under-roofing materials of these Examples and Comparative Examples, the friction resistance of each surface when dry and wet,
That is, the slip resistance test was conducted as follows, and the friction coefficient of each was determined. That is, JIS S 5007 in which each roof underlaying material sample is pasted on a slope of 5 inch slope, and a steel weight (width 10 cm, length 20 cm, height 3 cm, weight 5 kg) is pasted on the upper surface Place a rubber bottom for shoes (weight 0.1 kg) on the upper surface of each sample, and move the rubber bottom for shoes with a weight by a tensile tester 100 mm on the slope of the sample at a pulling speed of 500 mm / min. Then, the maximum load and the minimum load during this period were read from the chart, and the average tensile load was measured. This test was also performed while the entire surface of each sample was moistened with a certain amount of water. The respective measured values and the above weight values of the weight and the sole were substituted for T and W in the following equations, and the friction coefficient μ of each sample was obtained. That is, μ = T / (W · cos
α) + tan α, where T is the average tensile load and W is the weight of the weight and the sole. Mushroom and the slope is 5 inch, so μ =
26.34 °, so cos α = 0.894,
tan α = 0.500. Therefore, μ = T / (5.
It is represented by 1 × 0.894) +0.500. In this formula,
The average tensile load (T) value measured for each sample was substituted, and the friction coefficient μ of each sample was obtained. The result is
It is as shown in Tables 1 and 2 below.
【００２２】[0022]
【表１】 [Table 1]
【００２３】[0023]
【表２】 [Table 2]
【００２４】滑りにくさは、摩擦係数μの値の大小によ
り下記のように４段階に分け、その夫々に応じて判定基
準を記号で表した。 μ＝１．２以上 ◎：滑りにくい μ＝１．０〜１．２未満 ○：やゝ滑りにくい μ＝０．８以上〜１．０未満 △：やゝ滑りやすい μ＝０．８未満 ×：滑りやすい 表１から明らかなように、撥水性を有し、アクリル樹脂
主体の連続発泡層から成る微多孔性シートを表層とした
屋根下葺材であれば、乾燥時でも、従来の屋根下葺材及
び無孔性シートに比し摩擦抵抗は著しく向上するばかり
でなく、湿潤時でも大きい摩擦抵抗を維持し、良好な滑
り防止効果を維持する。これに対し、表層材をウレタン
樹脂の微多孔性シートで形成した屋根下葺材或いは無孔
性シートで形成した屋根下葺材では、乾燥時は、ある程
度の防滑効果を有するが、湿潤状態では、摩擦係数が
１．０以下に低下し、防滑効果が急激に低下し、施工現
場において、足場が危険な状態となることが分かる。ま
た、タルクを滑り止め剤として散着せしめたアスファル
トルーフィングから成る屋根下葺材は、乾燥時でも、極
めて滑りやすいことが分かる。また、ウレタン樹脂発泡
層の場合は、荷重に対し反撥する弾性を有するので足場
が不安定であるが、アクリル樹脂の連続発泡層は、足場
の荷重に対し、これに順応してへこむ柔軟性を有し、ま
た、弾性回復力が低いため、滑りの剪断力を吸収し易
く、その結果、安定した足場を保証する。また、その表
面は、微粘着性であることも、滑り止め効果に相乗効果
をもたらすものと思われる。The slip resistance is divided into the following four stages according to the magnitude of the value of the friction coefficient μ, and the judgment criteria are represented by symbols according to each of them. μ = 1.2 or more ◎: Difficult to slip μ = 1.0 to less than 1.2 ○: Slightly slippery μ = 0.8 to less than 1.0 Δ: Slightly slippery μ = less than 0.8 × ： Slippery As is clear from Table 1, if the roofing roofing material is water-repellent and has a microporous sheet consisting of a continuous foam layer mainly composed of an acrylic resin as the surface layer, the conventional roofing roofing material even when dried Further, not only the friction resistance is remarkably improved as compared with the non-porous sheet, but also a large friction resistance is maintained even when wet and a good anti-slip effect is maintained. On the other hand, a roof underlaying material formed by using a microporous sheet of urethane resin as the surface layer material or a roof underlaying material formed by a non-porous sheet has a certain anti-slip effect when dried, but when wet, friction It can be seen that the coefficient decreases to 1.0 or less, the anti-slip effect sharply decreases, and the scaffold becomes a dangerous state at the construction site. Further, it can be seen that the under-roofing material made of asphalt roofing in which talc is dispersed as an anti-slip agent is extremely slippery even when dried. Further, in the case of the urethane resin foam layer, the scaffold is unstable because it has elasticity that repels the load, but the continuous foam layer of acrylic resin has the flexibility to dent in conformity with the load of the scaffold. Since it has a low elastic recovery force, it is easy to absorb the shearing force of sliding, and as a result, a stable scaffold is guaranteed. Moreover, it is considered that the surface thereof is slightly tacky, which brings about a synergistic effect on the anti-slip effect.
【００２５】添付図面において、図１は、上記実施例１
において作製した所定の広幅、長尺の撥水性を有し且つ
アクリル樹脂主体の連続発泡層１から成る微多孔性シー
ト１とその裏面に強固に結着し、これを裏面から支持す
るポリエステル長繊維製ニードルパンチ不織布２とから
成る。表層材Ａの一部を裁除した斜面図を示す。図２
は、図１示すの撥水性アクリル樹脂の連続発泡層から成
る微多孔性シート１の表面の３００倍の拡大写真の模写
図である。図３は、実施例１により製造した本発明の屋
根下葺材の一部を裁除した斜面図を示す。３は、図１示
の表層材Ａの裏面に結着されたゴムアスファルトシート
から成る防水層を示す。図４は、実施例２において製造
した本発明の所定の広幅、長尺の屋根下葺材の拡大横断
面線図を示す。４は、該ゴムアスファルト塗層から成る
防水層３の下面に散着された珪砂微粉粒から成る粘着防
止層を示す。図５は、実施例３において製造した所定の
広幅、長尺の屋根下葺材の拡大横断面図を示す。その不
織布２は、ガラス繊維から成り、その下面に施した防水
層３は、スチレン・ブタジエンゴムラテックスの塗膜か
ら成る。図６は、実施例４において製造した所定の広
幅、長尺の屋根下葺材の拡大横断面図を示す。該撥水性
を有し、アクリル樹脂主体の連続発泡層から成る微多孔
性シートは、その裏面にアスファルトルーフィング原紙
にゴムアスファルトを含浸せしめた防水性シート３を貼
着して構成したものである。４は、該防水性シート３の
裏面に散着した珪砂微粉から成る粘着防止層を示す。In the attached drawings, FIG.
The microporous sheet 1 having a predetermined wide width and a long water repellency and having a continuous foam layer 1 mainly composed of an acrylic resin and a polyester long fiber which is firmly bound to the back surface and supports the back surface from the microporous sheet 1. And needle-punched nonwoven fabric 2 made from it. The slope view which cut a part of surface layer material A is shown. Figure 2
[Fig. 3] is a copy of a 300 times enlarged photograph of the surface of the microporous sheet 1 made of the continuous foamed layer of the water-repellent acrylic resin shown in Fig. 1. FIG. 3 shows a perspective view in which a part of the roof underlayment material of the present invention produced in Example 1 is cut away. Reference numeral 3 denotes a waterproof layer made of a rubber asphalt sheet bonded to the back surface of the surface layer material A shown in FIG. FIG. 4 shows an enlarged cross-sectional diagram of a predetermined wide and long roof underlayment material of the present invention manufactured in Example 2. Reference numeral 4 denotes an anti-adhesion layer made of fine particles of silica sand scattered on the lower surface of the waterproof layer 3 made of the rubber asphalt coating layer. FIG. 5 is an enlarged cross-sectional view of a predetermined wide and long roof underlayment material manufactured in Example 3. The nonwoven fabric 2 is made of glass fiber, and the waterproof layer 3 provided on the lower surface thereof is made of a coating film of styrene-butadiene rubber latex. FIG. 6 shows an enlarged cross-sectional view of a predetermined wide-width and long-length under-roof material manufactured in Example 4. The microporous sheet having a water-repellent and continuous foam layer mainly composed of an acrylic resin is formed by attaching a waterproof sheet 3 obtained by impregnating asphalt roofing base paper with rubber asphalt on the back surface thereof. Reference numeral 4 denotes an anti-adhesion layer made of silica sand fine powder scattered on the back surface of the waterproof sheet 3.
【００２６】[0026]
【発明の効果】このように本発明の屋根下葺材は、防水
層の表面に、ＪＩＳ Ｌ １０９２に基づいた撥水度７
０以上を有し且つ連続発泡層からアクリル樹脂主体の微
多孔性シートを設けたので、その表面の摩擦抵抗が従来
の無孔性屋根下葺材に比し著しく増大するばかりでな
く、特に、降雨においては、その撥水性と微多孔面によ
り表面の水濡れ、即ち水膜生成を防止し、大きい防滑効
果を維持することができ、従来の屋根下葺材にみられる
その表面は直ちに濡れてに水膜を生じ、摩擦抵抗が急激
に低下し、滑り易くなる危険を解消し、大きい摩擦抵抗
を維持でき、更にアクリル樹脂の連続発泡層の柔軟性と
弾性回復遅延性により滑りの剪断力の吸収性を容易に
し、足場の安定性が向上し、優れた防滑効果をもたらす
効果を有する。また、本発明の屋根下葺材の防水層は、
屋根下地面に対し良好な防水性と釘打ちにおける釘まわ
りの防水性を保証する効果をもたらす。上記のアクリル
樹脂主体の連続発泡層の気孔の直径を約０．２ｍｍ以下
であるときは、摩擦による気泡壁の損傷なく安定良好な
大きい摩擦抵抗と降雨時の水膜生成防止効果をもたら
す。本発明によれば、アクリル樹脂を主体とし、撥水剤
を０．５〜３重量％添加した原液を機械的に発泡処理
し、その発泡液を繊維質シートや防水シートに塗布し、
その塗布層を加熱、硬化せしめることにより、高能率に
上記の微多孔性シート又は直ちに該微多孔性シートを備
えた本発明の屋根下葺材が得られる。而して、その微多
孔性シートの裏面に、防水性塗料を塗布し或いは防水性
シート貼着することにより、高能率に本発明の屋根下葺
材を製造することができる。尚、発泡倍率を約２〜３倍
とし、その塗布量を１０〜１００ｇ／ｍ2 とするとき
は、本発明の屋根下葺材を安定良好に得られる。As described above, the roof underlaying material of the present invention has a water repellency of 7 according to JIS L 1092 on the surface of the waterproof layer.
Since the microporous sheet containing 0 or more and an acrylic resin as a main component is provided from the continuous foam layer, not only the frictional resistance of the surface thereof is significantly increased as compared with the conventional non-porous roof underlaying material, but also particularly the rainfall. In the above, its water repellency and microporous surface can prevent the surface from getting wet with water, that is, can prevent the formation of a water film, and can maintain a large anti-slip effect. It eliminates the risk of slipping due to the formation of a film and a sudden decrease in frictional resistance, maintaining a high frictional resistance. Furthermore, the flexibility and elastic recovery delay of the continuous foam layer of acrylic resin absorb the shearing force of sliding. It has the effect of facilitating scaffolding, improving the stability of the scaffold, and providing an excellent anti-slip effect. Further, the waterproof layer of the roof underlaying material of the present invention,
It has the effect of guaranteeing good waterproofness for the roof surface and waterproofness around the nails when nailing. When the diameter of the pores of the above-mentioned acrylic resin-based continuous foamed layer is about 0.2 mm or less, stable and large frictional resistance without damage to the bubble wall due to friction and a water film formation preventing effect during rainfall are brought about. According to the present invention, an acrylic resin as a main component, a stock solution containing 0.5 to 3% by weight of a water repellent is mechanically foamed, and the foamed liquid is applied to a fibrous sheet or a waterproof sheet,
By heating and curing the coating layer, the above-mentioned microporous sheet or the under-roofing material of the present invention provided immediately with the microporous sheet can be obtained with high efficiency. Thus, by applying a waterproof paint or attaching the waterproof sheet to the back surface of the microporous sheet, the under-roof material of the present invention can be manufactured with high efficiency. When the expansion ratio is set to about 2 to 3 times and the coating amount is set to 10 to 100 g / m 2 , the under-roof material of the present invention can be obtained stably and satisfactorily.
【図１】本発明の実施の１例の帯状の屋根下葺材の表層
を構成する微多孔性シートの一部を裁除した斜面図であ
る。FIG. 1 is a perspective view in which a part of a microporous sheet constituting a surface layer of a belt-like roof underlayment according to an embodiment of the present invention is cut away.
【図２】図１示の該微多孔性シートの一部の拡大平面図
である。2 is an enlarged plan view of a part of the microporous sheet shown in FIG.
【図３】図１示の該微多孔性シートを備えた本発明の実
施の１側の帯状の屋根下葺材の一部を裁除した斜面図で
ある。FIG. 3 is a perspective view in which a part of the strip-like under roofing material on one side of the embodiment of the present invention including the microporous sheet shown in FIG. 1 is cut away.
【図４】本発明の他の実施例の屋根下葺材の拡大横断面
図である。FIG. 4 is an enlarged cross-sectional view of a roof underlayment of another embodiment of the present invention.
【図５】本発明の更に他の実施例の屋根下葺材の拡大横
断面図である。FIG. 5 is an enlarged cross-sectional view of a roof underlayment member according to still another embodiment of the present invention.
【図６】本発明の更に他の実施例の屋根下葺材の拡大横
断面図である。FIG. 6 is an enlarged cross-sectional view of a roof underlayment member of still another embodiment of the present invention.
１ アクリル樹脂主体の微多孔性シート ２ 繊維質シート ３ 防水層 1 Acrylic resin-based microporous sheet 2 Fibrous sheet 3 Waterproof layer
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成６年５月１７日[Submission date] May 17, 1994
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１２[Correction target item name] 0012
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１２】次に、本発明の上記の屋根下葺材の製造法
の実施例につき説明する。本発明によれば、上記の撥水
性を有し且つそのアクリル樹脂の連続発泡層から成る微
多孔性シートを作製するには、例えば、アクリル酸エス
テル系重合体の水性エマルジョンを用いる。好ましく
は、柔軟性、微粘着性を有するアクリル酸メチルエステ
ル、アクリル酸エチルエステル又はアクリル酸ブチルエ
ステル等の単独又は共重合体樹脂で末端にヒドロキシル
基、カルボキシル基又はアミド基のいずれか又は複合し
て有するものを使用する。該アクリル樹脂の水性エマル
ジョン（固形分約４０重量％）を主体とし、例えば、こ
れを１００重量部に対し、撥水剤を０．５〜３重量部、
発泡安定剤、感熱発泡安定剤及び増粘剤を夫々１〜５重
量部当たり添加し、混合して成るアクリル樹脂原液を使
用する。このアクリル樹脂を主体とする原液を、公知の
連続発泡機により、例えば、スエヒロ連続発泡機を使用
し、その容器内に１側より一定の流量、例えば３Ｋｇ／
ｍｉｎで投入し、例えば、６００ｒ．ｐ．ｍで高速回転
により撹拌する一方、ホースを介して圧搾空気を発泡状
況を観察し乍ら適時、その送気量を調節して吹き込み、
所望の発泡倍率まで発泡させ、他側よりその発泡液を吐
出させる。このようにしてアクリル樹脂主体の発泡液を
調製する。次でこの発泡液を、広幅、長尺の繊維質シー
トの移行途上において、その上面にロールコーターによ
り均一な厚さに含浸塗布し、次でオーブンに導入し、そ
の塗布層を加熱、硬化させる。このようにして、その繊
維シートの繊維間隙に該発泡層の下部が喰い込み結着し
た柔軟且つ強靭な微多孔性シートから成る表層材として
得られるので、その後の取り扱いが容易で、次のその下
面に防水層を形成する作業に便利である。また、これ
を、施工現場に搬送し、その場で防水性シートの上面に
貼着して本発明の屋根下葺材を完成するようにしても良
い。Next, an embodiment of the method for manufacturing the above-mentioned under-roof material of the present invention will be described. According to the present invention, an aqueous emulsion of an acrylate polymer is used, for example, to produce the microporous sheet having the above-mentioned water repellency and a continuous foam layer of the acrylic resin. Preferably, flexible, slightly adhesive methyl acrylate having a terminal hydroxyl group alone or a copolymer resin such as ethyl ester or an acrylic Sambu Chiruesuteru acrylic acid, either or complexed carboxyl group or an amide group Use what you have. The aqueous emulsion of the acrylic resin (solid content: about 40% by weight) is mainly used, and, for example, with respect to 100 parts by weight, 0.5 to 3 parts by weight of a water repellent,
An acrylic resin undiluted solution obtained by adding and mixing a foaming stabilizer, a heat-sensitive foaming stabilizer and a thickener per 1 to 5 parts by weight, respectively, is used. The undiluted solution containing the acrylic resin as a main component is fed into the container at a constant flow rate from one side by a known continuous foaming machine, for example, a Suehiro continuous foaming machine, for example, 3 Kg /
It is charged at a rate of 600 min. p. While stirring by high speed rotation at m, while observing the foaming situation through the hose, adjust the amount of air blown and blow in compressed air,
The foam is expanded to a desired expansion ratio, and the foaming liquid is discharged from the other side. In this way, a foaming liquid mainly containing acrylic resin is prepared. Next, this foaming liquid is impregnated and applied on the upper surface of the wide and long fibrous sheet to a uniform thickness by a roll coater, and then introduced into an oven to heat and cure the applied layer. . In this way, the lower part of the foam layer is embedded in the fiber gap of the fiber sheet to obtain a surface layer material made of a flexible and tough microporous sheet which is bound and bonded, so that the subsequent handling is easy and the following It is convenient for work to form a waterproof layer on the lower surface. Further, this may be transported to a construction site and attached to the upper surface of the waterproof sheet on the spot to complete the under-roofing material of the present invention.
【手続補正書】[Procedure amendment]
【提出日】平成６年５月３０日[Submission date] May 30, 1994
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１２[Correction target item name] 0012
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１２】次に、本発明の上記の屋根下葺材の製造法
の実施例につき説明する。本発明によれば、上記の撥水
性を有し且つそのアクリル樹脂の連続発泡層から成る微
多孔性シートを作製するには、例えば、アクリル酸エス
テル系重合体の水性エマルジョンを用いる。好ましく
は、柔軟性、微粘着性を有するアクリル酸メチルエステ
ル、アクリル酸エチルエステル又はアクリル酸ブチルエ
ステル等の単独又は共重合体樹脂で末端にヒドロキシル
基、カルボキシル基又はアミド基のいずれか又は複合し
て有するものを使用する。該アクリル樹脂の水性エマル
ジョン（固形分約４０重量％）を主体とし、例えば、こ
れを１００重量部に対し、撥水剤を０．５〜３重量部、
発泡安定剤、感熱発泡安定剤及び増粘剤を夫々１〜５重
量部当たり添加し、混合して成るアクリル樹脂原液を使
用する。このアクリル樹脂を主体とする原液を、公知の
連続発泡機により、例えば、スエヒロ連続発泡機を使用
し、その容器内に１側より一定の流量、例えば３Ｋｇ／
ｍｉｎで投入し、例えば、６００ｒ．ｐ．ｍで高速回転
により撹拌する一方、ホースを介して圧搾空気を発泡状
況を観察し乍ら適時、その送気量を調節して吹き込み、
所望の発泡倍率まで発泡させ、他側よりその発泡液を吐
出させる。このようにしてアクリル樹脂主体の発泡液を
調製する。次でこの発泡液を、広幅、長尺の繊維質シー
トの移行途上において、その上面にロールコーターによ
り均一な厚さに含浸塗布し、次でオーブンに導入し、そ
の塗布層を加熱、硬化させる。このようにして、その繊
維シートの繊維間隙に該発泡層の下部が喰い込み結着し
た柔軟且つ強靭な微多孔性シートから成る表層材として
得られるので、その後の取り扱いが容易で、次のその下
面に防水層を形成する作業に便利である。また、これ
を、施工現場に搬送し、その場で防水性シートの上面に
貼着して本発明の屋根下葺材を完成するようにしても良
い。Next, an embodiment of the method for manufacturing the above-mentioned under-roof material of the present invention will be described. According to the present invention, an aqueous emulsion of an acrylate polymer is used, for example, to produce the microporous sheet having the above-mentioned water repellency and a continuous foam layer of the acrylic resin. Preferably, flexible, slightly adhesive methyl acrylate having a terminal hydroxyl group alone or a copolymer resin such as ethyl ester or an acrylic Sambu Chiruesuteru acrylic acid, either or complexed carboxyl group or an amide group Use what you have. The aqueous emulsion of the acrylic resin (solid content: about 40% by weight) is mainly used, and, for example, with respect to 100 parts by weight, 0.5 to 3 parts by weight of a water repellent,
An acrylic resin undiluted solution obtained by adding and mixing a foaming stabilizer, a heat-sensitive foaming stabilizer and a thickener per 1 to 5 parts by weight, respectively, is used. The undiluted solution containing the acrylic resin as a main component is fed into the container at a constant flow rate from one side by a known continuous foaming machine, for example, a Suehiro continuous foaming machine, for example, 3 Kg /
It is charged at a rate of 600 min. p. While stirring by high speed rotation at m, while observing the foaming situation through the hose, adjust the amount of air blown and blow in compressed air,
The foam is expanded to a desired expansion ratio, and the foaming liquid is discharged from the other side. In this way, a foaming liquid mainly containing acrylic resin is prepared. Next, this foaming liquid is impregnated and applied on the upper surface of the wide and long fibrous sheet to a uniform thickness by a roll coater, and then introduced into an oven to heat and cure the applied layer. . In this way, the lower part of the foam layer is embedded in the fiber gap of the fiber sheet to obtain a surface layer material made of a flexible and tough microporous sheet which is bound and bonded, so that the subsequent handling is easy and the following It is convenient for work to form a waterproof layer on the lower surface. Further, this may be transported to a construction site and attached to the upper surface of the waterproof sheet on the spot to complete the under-roofing material of the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 椿本 泰正 大阪府大阪市北区小松原町２番４号 椿本 興業株式会社内 (72)発明者 辻 義之 大阪府大阪市北区小松原町２番４号 椿本 興業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasumasa Tsubakimoto 2-4 Komatsubara-cho, Kita-ku, Osaka City, Osaka Prefecture Tsubakimoto Kogyo Co., Ltd. (72) Yoshiyuki Tsuji 2-4 Komatsubara-cho, Kita-ku, Osaka City, Osaka Prefecture Tsubakimoto Kogyo Co., Ltd.
Claims (13)
７０以上であり、且つ連続発泡層から成るアクリル樹脂
主体の微多孔性シートを防水層の表層として設けたこと
を特徴とする屋根下葺材。1. A roof underlayment material characterized by having a water repellency defined by JIS L 1092 of 70 or more and a microporous sheet mainly composed of an acrylic resin and comprising a continuous foam layer provided as a surface layer of a waterproof layer.
３重量％含有することにより、該撥水度を７０以上に保
持する請求項１記載の屋根下葺材。2. A water-repellent agent is added to the acrylic resin in an amount of 0.5 to 0.5.
The under-roof material according to claim 1, wherein the water repellency is maintained at 70 or more by containing 3% by weight.
っ素樹脂である請求項２記載の屋根下葺材。3. The under-roofing material according to claim 2, wherein the water repellent is silicone, paraffin or fluororesin.
００１〜０．０５ｍｍの範囲である請求項１記載の屋根
下葺材。4. The diameter of most of the pores of the foam layer is 0.
The under-roof material according to claim 1, which is in the range of 001 to 0.05 mm.
ルト、ゴム系塗料、合成樹脂系塗料から選んだ防水性塗
料の塗布層、又は防水性塗料含浸シート、アスファルト
ルーフィング、合成樹脂シート、合成樹脂フィルム、ゴ
ムシート、金属箔と合成樹脂又はゴムとのラミネートシ
ートから選んだ防水性シートである請求項１記載の屋根
下葺材。5. The waterproof layer is a coating layer of a waterproof paint selected from asphalt, rubber asphalt, rubber paint, synthetic resin paint, or waterproof paint impregnated sheet, asphalt roofing, synthetic resin sheet, synthetic resin film, The roof underlayment material according to claim 1, which is a waterproof sheet selected from a rubber sheet and a laminated sheet of a metal foil and a synthetic resin or rubber.
成した塗布層から成る請求項１に記載の屋根下葺材。6. The under-roof material according to claim 1, wherein the microporous sheet comprises a coating layer formed on a fibrous sheet.
又は有機合成繊維の単独又は混合繊維から成る織布、不
織布又は編布である請求項６記載の屋根下葺材。7. The under-roofing material according to claim 6, wherein the fibrous sheet is a woven fabric, a non-woven fabric or a knitted fabric made of natural fibers, inorganic fibers or organic synthetic fibers, either alone or in combination.
ートの上面に直接形成した塗布層から成る請求項１記載
の屋根下葺材。8. The under-roof material according to claim 1, wherein the microporous sheet comprises a coating layer formed directly on the upper surface of a heat-resistant waterproof sheet.
３重量％含有するアクリル樹脂主体の原液を機械的に連
続発泡処理し、得られる発泡液を繊維質シートに含浸塗
布し、次でその塗布層を加熱硬化してＪＩＳ Ｌ １０
９２に規定する撥水度７０以上であり、且つ連続発泡層
から成るアクリル樹脂主体の微多孔性シートに形成し、
その裏面に防水性塗料を塗布し又は防水性シートを貼着
して防水層を設けたことを特徴とする屋根下葺材の製造
法。9. A water repellent agent is added to an acrylic resin in an amount of 0.5 to 0.5.
An acrylic resin-based stock solution containing 3% by weight was mechanically subjected to continuous foaming treatment, the resulting foaming solution was impregnated and coated on a fibrous sheet, and then the coating layer was cured by heating to JIS L 10
And a water repellency of 70 or more as defined in 92, and formed into a microporous sheet mainly composed of an acrylic resin and comprising a continuous foam layer,
A method for producing a roof underlaying material, characterized in that a waterproof coating is applied to the back surface of the roof or a waterproof sheet is attached to form a waterproof layer.
〜３重量％含有するアクリル樹脂主体の原液を機械的に
連続発泡処理し、得られる発泡液を耐熱性の合成樹脂シ
ート又はフィルム又は金属箔と合成樹脂又はゴムとのラ
ミネートシートから成る防水性シートに塗布し、次でそ
の塗布層を加熱硬化してＪＩＳ Ｌ１０９２に規定する
撥水度７０以上であり、且つ連続発泡層から成るアクリ
ル樹脂主体の微多孔性シートに形成したことを特徴とす
る屋根下葺材の製造法。10. A water repellent agent is added to an acrylic resin in an amount of 0.5.
A water-resistant sheet comprising a heat-resistant synthetic resin sheet or film or a laminated sheet of a metal foil and a synthetic resin or rubber obtained by mechanically and continuously foaming an acrylic resin-based stock solution containing 3 to 3% by weight. A roof characterized by having a water repellency of 70 or more as defined in JIS L1092 and then being formed into a microporous sheet mainly composed of an acrylic resin composed of a continuous foaming layer by heat-curing the coating layer. Manufacturing method of underlaying material.
を主体とし、その１００重量部に対し撥水剤を０．５〜
３重量部、発泡安定剤、感熱発泡安定剤、増粘剤を夫々
１〜５重量％混合して成る請求項９又は１０記載の屋根
下葺材の製造法。11. The undiluted solution is mainly composed of an acrylic resin emulsion, and a water repellent is added in an amount of 0.5 to 100 parts by weight.
The method for producing a roof underlaying material according to claim 9 or 10, wherein 3 parts by weight, a foaming stabilizer, a heat-sensitive foaming stabilizer, and a thickener are each mixed in an amount of 1 to 5% by weight.
は、約２〜３倍である請求項９，１０又は１１記載の屋
根下葺材の製造法。12. The method for producing a roof underlayment material according to claim 9, 10 or 11, wherein a mechanical expansion ratio of the undiluted solution is about 2 to 3 times.
４５重量％）の塗布量は、１０〜１００ｇ／ｍ2 である
請求項９又は１０記載の屋根下葺材の製造法。13. The foaming liquid (acrylic resin solid content of 40 to
The coating amount of 45% by weight) is 10 to 100 g / m 2 , and the method for producing a roof underlaying material according to claim 9 or 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10760994A JP2701130B2 (en) | 1994-04-22 | 1994-04-22 | Roof underlaying material and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10760994A JP2701130B2 (en) | 1994-04-22 | 1994-04-22 | Roof underlaying material and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07292877A true JPH07292877A (en) | 1995-11-07 |
| JP2701130B2 JP2701130B2 (en) | 1998-01-21 |
Family
ID=14463518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10760994A Expired - Lifetime JP2701130B2 (en) | 1994-04-22 | 1994-04-22 | Roof underlaying material and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2701130B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009221836A (en) * | 2008-02-20 | 2009-10-01 | Yoshio Ito | Roof tile holding material |
| JP2009243247A (en) * | 2008-04-01 | 2009-10-22 | Ube Ind Ltd | Water proof sheet material |
| KR101330583B1 (en) * | 2011-12-23 | 2013-11-25 | 이동규 | Waterproofing sheet and manufacturing method thereof |
| JP2020165282A (en) * | 2019-03-28 | 2020-10-08 | 日新工業株式会社 | Skin sheet for roofing sheet and roofing sheet with skin sheet |
| US20210381229A1 (en) * | 2020-06-05 | 2021-12-09 | Johns Manville | Non-wicking underlayment board |
-
1994
- 1994-04-22 JP JP10760994A patent/JP2701130B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009221836A (en) * | 2008-02-20 | 2009-10-01 | Yoshio Ito | Roof tile holding material |
| JP2009243247A (en) * | 2008-04-01 | 2009-10-22 | Ube Ind Ltd | Water proof sheet material |
| KR101330583B1 (en) * | 2011-12-23 | 2013-11-25 | 이동규 | Waterproofing sheet and manufacturing method thereof |
| JP2020165282A (en) * | 2019-03-28 | 2020-10-08 | 日新工業株式会社 | Skin sheet for roofing sheet and roofing sheet with skin sheet |
| US20210381229A1 (en) * | 2020-06-05 | 2021-12-09 | Johns Manville | Non-wicking underlayment board |
| US11773586B2 (en) * | 2020-06-05 | 2023-10-03 | Johns Manville | Non-wicking underlayment board |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2701130B2 (en) | 1998-01-21 |
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