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JP3838683B2 - Waterproof tape - Google Patents
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JP3838683B2 - Waterproof tape - Google Patents

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Publication number
JP3838683B2
JP3838683B2 JP30053095A JP30053095A JP3838683B2 JP 3838683 B2 JP3838683 B2 JP 3838683B2 JP 30053095 A JP30053095 A JP 30053095A JP 30053095 A JP30053095 A JP 30053095A JP 3838683 B2 JP3838683 B2 JP 3838683B2
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JP
Japan
Prior art keywords
water
tape
polypropylene resin
resin sheet
adhesive layer
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
Application number
JP30053095A
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Japanese (ja)
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JPH09118861A (en
Inventor
保雄 福地
Original Assignee
アサヒゴム株式会社
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Priority to JP30053095A priority Critical patent/JP3838683B2/en
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  • Adhesives Or Adhesive Processes (AREA)
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Description

【0001】
【発明の属する技術分野】
本発明は建築用防水材等として用いられる止水テープに関する。
【0002】
【従来の技術】
図3に示すように、従来、建築物aの隙間bに水が浸入することを防ぐため、隙間bを塞ぐ止水テープcが用いられていた。この止水テープcは加硫ゴムやポリエチレン樹脂(PE)フィルムやポリエチレンテレフタレート樹脂(PET)フィルム等の水と反応しない防水性基材dの裏面にブチルゴムやゴムアスファルト等の水と反応しない粘着材からなる粘着層eが設けられ、この粘着層eを被着体である建築物aに貼着して隙間bを塞ぐようにするものであった。
【0003】
【発明が解決しようとする課題】
前記従来の止水テープcは、粘着材であるブチルゴムやゴムアスファルト等は被着体である建築物aの凹凸に追従密着する流動性軟質材であり、また、複合化される防水性基材は、加硫ゴムの場合は弾性個体であり、PEフィルムやPETフィルムの場合は非弾性個体である。このため、被着体である建築物aに地震等によって変形応力が掛かり、水の浸入を防ごうとする隙間bにズレや広がりが発生したときに、例えば、加硫ゴムでは残留変形応力があり、伸ばされた後に収縮しようとして止水テープcが剥がれてしまう。また、PEフィルムでは温冷の繰り返しの自然環境で収縮してやはり止水テープcが剥がれてしまう。また、PETフィルムは硬いため、低温時の衝撃に対して容易に破壊する等して止水テープcの剥がれや破壊の原因となり、結果として防水機能が果たせなくなっている。
【0004】
【課題を解決するための手段】
本発明の止水テープは前記従来技術の欠点を解消するもので、建築物における隙間を止水するために、防水性基材の裏面に粘着層を備えた止水テープであって、前記防水性基材が厚味10〜80μmの無延伸ポリプロピレン樹脂シートで構成され、前記無延伸ポリプロピレン樹脂シートの伸びが800%の場合でも、前記粘着層は前記無延伸ポリプロピレン樹脂シートに追従することを特徴とする。
請求項記載の発明は、前記粘着層はブチル系粘着材、或いは、ゴムアスファルト系粘着材で構成されることを特徴とする。
【0005】
前記防水性基材を構成する、無延伸ポリプロピレン樹脂シートは、キャスティングポリプロピレン樹脂(CPP)フィルム等、50モル%以上のプロピレン単位成分を有する結晶性混合物を配向させることなく無延伸状態で均一な厚味にフィルム化することにより得られるものである。
このような無延伸ポリプロピレン樹脂シートは、厚味が10μm〜80μm程度の薄いフィルムであっても、低温(ー30℃)から高温(+150℃)の広範囲においても、耐衝撃性や物理特性に優れ、寸法形状の変化が少なく、建築物が置かれる自然環境(ー20℃〜+80℃)に適応するのに充分な適性を有している。
例えば、厚味50μmのCPPフィルムは30%までの伸びには復元性があり、以後の伸びには復元しないものの、残留応力を持たない。また、この時の応力は2kg/インチ幅程度である。
【0006】
一方、粘着層を構成するブチルゴムやゴムアスファルト等の粘着材は同温度領域(ー20℃〜+80℃)で常に軟質で、それ自体に残留応力が掛かる間流動するので、被着体の性質や凹凸等の表面状態を問わずにに密着させるのに適する他、水と全く相溶性を持たず、防水性に優れる。
これら粘着材の凝集力は粘着材の厚味や形状にもよるが、通常、1mm厚でインチ平方の断面でのずり応力が5〜10kg/インチ2で、この時の伸びは1000%以上になる。
【0007】
ブチルゴムやゴムアスファルトにとって、CPPフィルム面は良好な被着体であり、その被着体面をコロナ放電処理するとさらに密着力は10〜20%向上する。
このように、これら無延伸ポリプロピレン樹脂シートと粘着層を複合させた止水テープを建築物の隙間の防水に用いると、ゼロスパン(隙間ゼロからの割れによる広がり)が40〜50mm広がるまで、粘着層が被着体である建築物から剥がれることなく無延伸ポリプロピレン樹脂シートも切れず止水性を保持することができる。
【0008】
尚、CPPフィルムの厚味を80μmより厚くすると止水テープ全体はしっかりするが、被着体に対するブチルゴムの密着性が落ち、ブチルゴムの厚味も上げる必要がでてくる。逆にCPPフィルムの厚味を10μm未満にすると止水テープ全体が軟質となり、施工性はよくなるものの製品形状に問題がでやすくなる。従って、無延伸ポリプロピレン樹脂シートの厚味は10〜80μmの範囲とする。
【0009】
図1はこの止水テープ1をアクリル板からなる被着体10,10のゼロスパンの隙間11に貼着した状態を示し、この被着体10,10の隙間11を広げることによりゼロスパン伸びを測定したところ、図2に示すように、スパン幅50mmでブチルゴム粘着層3と無延伸ポリプロピレン樹脂シート2が同時に切れ始めた。これにより、被着体が40mm幅にひび割れても止水性が確保されることが確認された。
【0010】
尚、CPPフィルムの厚味を80μmより厚くすると止水テープ全体はしっかりするが、被着体に対するブチルゴムの密着性が落ち、ブチルゴムの厚味も上げる必要がでてくる。逆にCPPフィルムの厚味を10μm未満にすると止水テープ全体が軟質となり、施工性はよくなるものの製品形状に問題がでやすくなる。従って、無延伸ポリプロピレン樹脂シートの厚味は10〜80μmの範囲にするのが好ましい。
【0011】
前記CPPフィルムは30%以上の延伸により分子配向し、OPP(オリエンテリングポリプロピレン)となり、延伸された方向に強度を発生させる(破断物性は、強度800kg/cm2 、伸び800%)が、ブチルゴム、ゴムアスファルトは軟質高粘着質(破断物性は、強度0.3kg/cm2 、伸び1500%)で、CPPフィルムから剥がれることなくその延伸に追従する。
この特性を利用することにより、入り組んだ被着体にも容易に貼り込むことができ、形が戻らないので、良好な止水工事が実現する。
【0012】
【発明の効果】
このように、本発明によれば、隙間幅が変化するゼロスパンの間隙に対する止水性に優れた止水テープを提供することができる。
【図面の簡単な説明】
【図1】 本発明止水テープの貼着した状態を示す断面図
【図2】 本発明止水テープの貼着した状態を示す断面図
【図3】従来の止水テープの貼着した状態を示す断面図
【符号の説明】
1 止水テープ
2 無延伸ポリプロピレン樹脂シート(CPPフィルム)
3 粘着層(ブチルゴム)
10 被着体
11 隙間
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waterproofing tape used as a waterproofing material for buildings.
[0002]
[Prior art]
As shown in FIG. 3, conventionally, in order to prevent water from entering the gap b of the building a, a water-stopping tape c that closes the gap b has been used. This waterproofing tape c is an adhesive that does not react with water such as butyl rubber or rubber asphalt on the back surface of a waterproof substrate d that does not react with water such as vulcanized rubber, polyethylene resin (PE) film or polyethylene terephthalate resin (PET) film. The pressure-sensitive adhesive layer e is provided, and the pressure-sensitive adhesive layer e is adhered to the building a which is an adherend so as to close the gap b.
[0003]
[Problems to be solved by the invention]
The conventional water-stopping tape c is a fluid soft material in which butyl rubber, rubber asphalt, or the like, which is an adhesive, adheres closely to the unevenness of the building a, which is an adherend, and is a waterproof base material that is compounded Is an elastic solid in the case of vulcanized rubber, and inelastic solid in the case of PE film or PET film. For this reason, when a deformation stress is applied to the building a which is an adherend due to an earthquake or the like, and a gap or spread occurs in the gap b to prevent water from entering, for example, residual deformation stress is generated in vulcanized rubber. Yes, the waterproof tape c is peeled off when trying to shrink after being stretched. Further, the PE film shrinks in a natural environment of repeated heating and cooling, and the water-stopping tape c is peeled off. Further, since the PET film is hard, the waterproofing tape c is peeled off or broken by being easily broken against an impact at a low temperature, and as a result, the waterproof function cannot be performed.
[0004]
[Means for Solving the Problems]
The water-stopping tape of the present invention eliminates the disadvantages of the prior art, and is a water-stopping tape having an adhesive layer on the back surface of a waterproof base material for water-stopping a gap in a building, The non-stretched polypropylene resin sheet having a thickness of 10 to 80 μm is formed, and the adhesive layer follows the unstretched polypropylene resin sheet even when the stretch of the unstretched polypropylene resin sheet is 800%. And
The invention described in claim 2 is characterized in that the adhesive layer is composed of a butyl adhesive material or a rubber asphalt adhesive material.
[0005]
The non-stretched polypropylene resin sheet constituting the waterproof substrate has a uniform thickness in an unstretched state without orienting a crystalline mixture having a propylene unit component of 50 mol% or more, such as a casting polypropylene resin (CPP) film. It is obtained by film-forming to taste.
Such an unstretched polypropylene resin sheet is excellent in impact resistance and physical properties even in a thin film having a thickness of about 10 μm to 80 μm, or in a wide range from a low temperature (−30 ° C.) to a high temperature (+ 150 ° C.). There is little change in dimensions and shape, and it has sufficient suitability to adapt to the natural environment (-20 ° C to + 80 ° C) where the building is placed.
For example, a thick CPP film having a thickness of 50 μm is recoverable up to 30% elongation and does not recover to subsequent elongation, but does not have residual stress. The stress at this time is about 2 kg / inch width.
[0006]
On the other hand, adhesive materials such as butyl rubber and rubber asphalt constituting the adhesive layer are always soft in the same temperature range (−20 ° C. to + 80 ° C.) and flow while applying residual stress to the adhesive layer. In addition to being suitable for close contact regardless of the surface condition such as irregularities, it has no water compatibility and is excellent in waterproofness.
The cohesive strength of these adhesive materials depends on the thickness and shape of the adhesive materials, but usually the shear stress is 5 to 10 kg / inch 2 in a 1 mm thick and inch square section, and the elongation at this time is 1000% or more. Become.
[0007]
For butyl rubber and rubber asphalt, the CPP film surface is a good adherend, and when the adherend surface is subjected to corona discharge treatment, the adhesion is further improved by 10 to 20%.
As described above, when the waterproof tape in which the non-stretched polypropylene resin sheet and the adhesive layer are combined is used for waterproofing the gap of the building, the adhesive layer is expanded until the zero span (expansion due to crack from zero gap) is expanded by 40 to 50 mm. However, the non-stretched polypropylene resin sheet is not cut off without being peeled off from the building that is the adherend, and the water-stopping property can be maintained.
[0008]
If the thickness of the CPP film is thicker than 80 μm, the entire water-stopping tape is secured, but the adhesion of butyl rubber to the adherend is lowered, and it is necessary to increase the thickness of butyl rubber. On the other hand, if the thickness of the CPP film is less than 10 μm, the entire water-stopping tape becomes soft and the workability is improved, but a problem is easily caused in the product shape. Therefore, the thickness of the unstretched polypropylene resin sheet is in the range of 10 to 80 μm .
[0009]
FIG. 1 shows a state in which the water-stopping tape 1 is adhered to a zero-span gap 11 of the adherends 10 and 10 made of an acrylic plate, and the zero-span elongation is measured by widening the gap 11 between the adherends 10 and 10. As a result, as shown in FIG. 2, the butyl rubber adhesive layer 3 and the unstretched polypropylene resin sheet 2 started to be cut at the same time with a span width of 50 mm. Thus, it was confirmed that the water-stopping property was ensured even when the adherend was cracked to a width of 40 mm.
[0010]
If the thickness of the CPP film is thicker than 80 μm, the entire water-stopping tape is secured, but the adhesion of butyl rubber to the adherend is lowered, and it is necessary to increase the thickness of butyl rubber. On the other hand, if the thickness of the CPP film is less than 10 μm, the entire water-stopping tape becomes soft and the workability is improved, but a problem is easily caused in the product shape. Therefore, the thickness of the unstretched polypropylene resin sheet is preferably in the range of 10 to 80 μm.
[0011]
The CPP film is molecularly oriented by stretching by 30% or more to become OPP (orienting polypropylene), and generates strength in the stretched direction (breaking properties are strength 800 kg / cm 2 , elongation 800%), but butyl rubber, Rubber asphalt is soft and highly adhesive (breaking physical properties are strength 0.3 kg / cm 2 , elongation 1500%), and follows the stretching without peeling off from the CPP film.
By utilizing this characteristic, it can be easily stuck on an intricate adherend and the shape does not return, so that a good water stop construction is realized.
[0012]
【The invention's effect】
Thus, according to the present invention, it is possible to provide a water-stopping tape excellent in water-stopping with respect to a zero-span gap in which the gap width changes.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state in which the waterproofing tape of the present invention is attached. FIG. 2 is a cross-sectional view of a state in which the waterproofing tape of the present invention is attached. Sectional view showing [signs]
1 Water stop tape 2 Unstretched polypropylene resin sheet (CPP film)
3 Adhesive layer (butyl rubber)
10 adherend 11 gap

Claims (2)

建築物における隙間を止水するために、防水性基材の裏面に粘着層を備えた止水テープであって、前記防水性基材が厚味10〜80μmの無延伸ポリプロピレン樹脂シートで構成され、前記無延伸ポリプロピレン樹脂シートの伸びが800%の場合でも、前記粘着層は前記無延伸ポリプロピレン樹脂シートに追従することを特徴とする止水テープ。 To water stopping gaps in buildings, a water stop tape having an adhesive layer on the back surface of the waterproof substrate, said waterproof base is made of a cast polypropylene resin sheet thickness 10~80μm The water-stopping tape , wherein the adhesive layer follows the unstretched polypropylene resin sheet even when the unstretched polypropylene resin sheet has an elongation of 800% . 前記粘着層はブチル系粘着材、或いは、ゴムアスファルト系粘着材で構成されることを特徴とする請求項記載の止水テープ。The adhesive layer butyl-based adhesive, or waterproofing tape according to claim 1, characterized in that it is made of rubber asphalt-based adhesive.
JP30053095A 1995-10-25 1995-10-25 Waterproof tape Expired - Fee Related JP3838683B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30053095A JP3838683B2 (en) 1995-10-25 1995-10-25 Waterproof tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30053095A JP3838683B2 (en) 1995-10-25 1995-10-25 Waterproof tape

Publications (2)

Publication Number Publication Date
JPH09118861A JPH09118861A (en) 1997-05-06
JP3838683B2 true JP3838683B2 (en) 2006-10-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP30053095A Expired - Fee Related JP3838683B2 (en) 1995-10-25 1995-10-25 Waterproof tape

Country Status (1)

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JP (1) JP3838683B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004292603A (en) * 2003-03-26 2004-10-21 Asahi Rubber Kk How to attach waterproof tape and building components
JP4608422B2 (en) * 2005-12-05 2011-01-12 共同技研化学株式会社 Adhesive film
JP6017156B2 (en) * 2012-03-26 2016-10-26 パーカーアサヒ株式会社 Waterproofing method using waterproofing screw
CN108086147A (en) * 2018-01-31 2018-05-29 单国珠 A kind of long-life freedom from repairs bridge extension joint and waterstop
JP7439453B2 (en) * 2019-10-28 2024-02-28 Toppanホールディングス株式会社 adhesive sheet

Also Published As

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