JP4719336B2 - Butyl rubber composite sealing material - Google Patents
Butyl rubber composite sealing material Download PDFInfo
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- JP4719336B2 JP4719336B2 JP2000118858A JP2000118858A JP4719336B2 JP 4719336 B2 JP4719336 B2 JP 4719336B2 JP 2000118858 A JP2000118858 A JP 2000118858A JP 2000118858 A JP2000118858 A JP 2000118858A JP 4719336 B2 JP4719336 B2 JP 4719336B2
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- Prior art keywords
- butyl rubber
- sealing material
- foam
- composite sealing
- rubber composite
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- Sealing Material Composition (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、土木、建築等に使用されるコンクリート2次製品、金属製品に適用されるゴムシール材に関する。
【0002】
【従来の技術】
近年、土木、建築分野において、ボックスカルバート、U字溝、フリューム等工場生産によるコンクリート2次製品、金属製品(以下コンクリート製品等と称する)が多用されている。これらコンクリート製品等の設置、接続部分には、従来密着性、止水性の向上の目的で、合成ゴムスポンジ等を粘着性ブチルゴムで被覆した粘着性定形シール材(以下ブチルゴム複合シール材と称する)が用いられている。
【0003】
従来、このようなブチルゴム複合シール材は、止水性に優れ、取扱いも容易で、且つ安価であることから、コンクリート製品等接続面部分に接着剤等を用いて、通常指定部分に接着固定、設置される。
【0004】
従来のブチルゴム複合シール材を、コンクリート製品等に接着固定後、コンクリート製品等を正確に、適正位置で接続するために、接続すべき次のコンクリート製品等の接続部分を、1、2度該ブチルゴム複合シール材が接着固定された接続面に接触させる、いわゆる位置合わせ作業が行われる。
ところが従来のブチルゴム複合シール材は、この位置合わせ作業時に、接続すべき次のコンクリート製品等に付着して正規の接着位置からずれ、または剥がれが生じる等の不具合が発生する場合があった。特に大型ボックスカルバート等は、大型クレーン等重機を使用して位置決めを行うことから、ブチルゴム複合シール材の改良が望まれていた。このため、上面のブチルゴム層上に紐、網状品を設置する等の提案がなされているが、取扱性並びに経済性の面から満足すべき状態にはない。
【0005】
【発明が解決しようとする課題】
本発明は、上記の問題点を解決し、コンクリート製品等に設置が容易で、且つ取扱性、止水性が更に優れたブチルゴム複合シール材を提供するものである。
【0006】
【課題を解決するための手段】
本発明は、合成ゴム、天然ゴムまたは熱可塑性樹脂よりなる柔軟な発泡体を粘着性ブチルゴムで被覆したシール材であるブチルゴム複合シール材において、上面の一部に前記発泡体が露出しており、該発泡体露出層の表面が粘着性ブチルゴム層よりも低く、発泡体露出層部分が凹んでおり、土木・建築用途に使用されることを特徴とするブチルゴム複合シール材(以下、本ブチルゴム複合シール材と称する)である。
【0007】
本発明のブチルゴム複合シール材をボックスカルバート、U字溝、フリューム等コンクリート製品に使用することにより、接続時の位置合わせにおいても、ずれ、剥離等の不具合の発生がなく、止水性に優れたコンクリート製品等の土木、建築等構築物の設置、完成が可能となる。
【0008】
本発明のブチルゴム複合シール材に用いられる発泡体は、弾力性、反発力を有する発泡体、柔軟なスポンジであれば特に限定されないが、エチレン−プロピレンゴム(EPDM)、クロロプレンゴム(CR)等の合成ゴム、天然ゴム、または半硬質塩化ビニル樹脂等の合成樹脂製品が好ましく使用出来る。柔軟性は使用すべきシール材の大きさ等により異なり、特に限定されないが、一般にJIS(C)硬度で20〜30程度が好ましい。
【0009】
本発明の粘着性ブチルゴムとしては、建築、土木用シール材として広く使用されている粘着性ブチルゴムを用いることが出来る。
本発明の粘着性ブチルゴムはベースゴムとして、ブチルゴム、またはタイヤチューブ等を粉砕したいわゆる再生ブチルゴムを単独で、またはこれらを混合したゴム、及びこれらに更にスチレン−ブタジエンブロック共重合体を混合したゴムを用い、これに軟化剤、カーボンブラック、無機充填剤、および粘着付与剤を添加した粘着性を有するブチルゴムが好ましく用いられる。
上記の粘着付与剤としては、クマロン樹脂、石油系炭化水素樹脂、フェノールテルペン系樹脂およびロジン誘導体等が用いられる。
本発明の粘着性ブチルゴムとしては、特に限定されるわけではないが、通常JIS K−2530に準拠した20℃の針入度が60±10、引張強さが0.05〜0.1MPa程度の柔軟性を有するものが好ましい。
【0010】
本発明のブチルゴム複合シール材は、上面の一部分が発泡体露出層であることが必要であり、シール材上面面積の3/4〜1/4が発泡体露出層であることが好ましい。ブチルゴム被覆層がシール材上面の全面を被覆している場合は、位置決め時のシール材接触により、該シール材のずれ、剥離が生じる恐れがある。また、ブチルゴム層被覆が3/4を超える場合は該シール材のずれ、剥離が生じる恐れがあり、ブチルゴム層被覆が1/4未満の場合は、位置決め時のずれ、剥離は生じないが、接続後の止水性低下の恐れがある。
発泡体が露出する上面は、図3、図4に示す如く、ブチルゴム層が発泡体面より高い状態または、図5、図6に示す如くブチルゴム層と発泡体面が同一高さにある状態のいずれにおいても、本発明の実施に有効である。
【0011】
更に本ブチルゴム複合シール材において、粘着性ブチルゴムとして粘着性を有する水膨張性ブチルゴムを使用することは、止水性能を更に向上する本発明の目的に有効である。該水膨張性ブチルゴムの水膨張倍率は、1.2〜2倍程度が有用で、水膨張倍率が1.2倍未満の場合、水膨張機能が充分発揮出来ない場合があり、2倍を超えた場合、シール取付後、雨水等による水漏れ抵抗性がやや低下する場合がある。
【0012】
以下、本発明を、実施例をもって更に詳細に説明する。
実施例1及び3、比較例1〜2、参考例1〜3
表1および図1〜図6に示すブチルゴム複合シール材について、(1)はがれ性試験として、シール材下面を50mm×150mmのコンクリート板に接着剤(CRKボンドS−203、クロロプレンゴム溶剤系)を塗布後、各シール材を接着し、同サイズのコンクリート板上に荷重500gで1分間押しつける操作を繰り返し、はがれるまでの回数を測定した。さらに図7に示す外径500cmの鋼製止水試験機にシール材下面を上記接着材で接着後、スペーサーを使用してシール材高さの1/2迄圧縮(50%圧縮)し、水圧を0.1MPa×3分間付加し、漏水の有無、圧力の変化を測定した。また、はがれ性、止水性について、良好(◎)、やや不良(△)の総合評価を行った。
【0013】
【表1】
【0014】
表1において、発泡体露出層の幅とは、図3〜図6に図示した断面における4:ブチルゴム複合シール材のブチルゴム層で被覆されていない上面の部分の幅を示す。
【0015】
【発明の効果】
本発明のブチルゴム複合シール材は、コンクリート製品等に、設置が容易で、且つ取扱性、止水性が優れており産業上有用性が極めて高い。
【図面の簡単な説明】
【図1】従来のブチルゴム複合シール材の断面図例
【図2】従来のブチルゴム複合シール材の断面図例
【図3】本発明の上面(4)の一部分がブチルゴム層で被覆されていないブチルゴム複合シール材
【図4】本発明の上面の一部分(4)がブチルゴム層で被覆されていないブチルゴム複合シール材
【図5】本発明の上面の一部分(4)がブチルゴム層で被覆されていないブチルゴム複合シール材
【図6】本発明の上面の一部分(4)がブチルゴム層で被覆されていないブチルゴム複合シール材
【図7】止水性能評価に用いた鋼製止水試験機の概要図
【符号の説明】
1 シール材上面
2 被覆ブチルゴム層
3 発泡体
4 ブチルゴム複合シール材のブチルゴム層で被覆されていない上面の部分
5 シール材
6 50%圧縮時使用のスペーサー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rubber seal material applied to a secondary concrete product and a metal product used in civil engineering and construction.
[0002]
[Prior art]
In recent years, concrete secondary products and metal products (hereinafter referred to as concrete products, etc.) produced by factories such as box culverts, U-shaped grooves, and flume are frequently used in the civil engineering and construction fields. For the installation and connection of these concrete products, etc., an adhesive fixed sealing material (hereinafter referred to as a butyl rubber composite sealing material) in which a synthetic rubber sponge or the like is coated with an adhesive butyl rubber has been used for the purpose of improving adhesion and water-stopping. It is used.
[0003]
Conventionally, such a butyl rubber composite sealing material has excellent water-stopping properties, is easy to handle, and is inexpensive, so it is usually adhesively fixed and installed on the designated part using an adhesive etc. on the connecting surface part of concrete products, etc. Is done.
[0004]
After bonding and fixing the conventional butyl rubber composite sealing material to concrete products, etc., in order to connect the concrete products etc. at the correct position, the connecting part of the next concrete product etc. to be connected is once or twice. A so-called alignment operation is performed in which the composite sealing material is brought into contact with the connection surface to which the composite sealing material is bonded and fixed.
However, the conventional butyl rubber composite sealing material sometimes causes problems such as sticking to the next concrete product to be connected and shifting from the normal bonding position or peeling off during this positioning operation. In particular, large box culverts and the like are positioned using heavy machinery such as large cranes, and therefore, improvement of a butyl rubber composite sealing material has been desired. For this reason, proposals such as installing a string or a net-like product on the butyl rubber layer on the upper surface have been made, but it is not in a satisfactory state from the viewpoint of handling and economy.
[0005]
[Problems to be solved by the invention]
The present invention solves the above-mentioned problems, and provides a butyl rubber composite sealing material that is easy to install on concrete products and that is further excellent in handling properties and water-stopping properties.
[0006]
[Means for Solving the Problems]
In the butyl rubber composite sealing material, which is a sealing material in which a flexible foam made of synthetic rubber, natural rubber or thermoplastic resin is coated with adhesive butyl rubber, the foam is exposed on a part of the upper surface. The exposed surface of the foam is lower than the adhesive butyl rubber layer, the exposed portion of the foam is recessed, and is used for civil engineering and construction applications (hereinafter referred to as the present butyl rubber composite seal). Called a material).
[0007]
By using the butyl rubber composite sealing material of the present invention for concrete products such as box culverts, U-shaped grooves, flume, etc., there is no occurrence of problems such as displacement and peeling even in alignment at the time of connection, and excellent water-stopping concrete It is possible to install and complete civil engineering and architectural structures such as products.
[0008]
The foam used for the butyl rubber composite sealing material of the present invention is not particularly limited as long as it is a foam having elasticity and resilience, or a flexible sponge, but such as ethylene-propylene rubber (EPDM) and chloroprene rubber (CR). Synthetic resin products such as synthetic rubber, natural rubber, or semi-rigid vinyl chloride resin can be preferably used. The flexibility varies depending on the size of the sealing material to be used, and is not particularly limited. However, in general, a JIS (C) hardness of about 20 to 30 is preferable.
[0009]
As the adhesive butyl rubber of the present invention, an adhesive butyl rubber widely used as a sealing material for construction and civil engineering can be used.
The adhesive butyl rubber of the present invention is made of butyl rubber, a so-called regenerated butyl rubber obtained by pulverizing a tire tube or the like alone or a mixture thereof, and a rubber obtained by further mixing a styrene-butadiene block copolymer as the base rubber. Preferably, butyl rubber having tackiness obtained by adding a softener, carbon black, an inorganic filler, and a tackifier to this is preferably used.
As the tackifier, coumarone resin, petroleum hydrocarbon resin, phenol terpene resin, rosin derivative and the like are used.
Although it is not necessarily limited as the adhesive butyl rubber of the present invention, the penetration of 20 ° C. in accordance with JIS K-2530 is usually 60 ± 10, and the tensile strength is about 0.05 to 0.1 MPa. What has a softness | flexibility is preferable.
[0010]
In the butyl rubber composite sealing material of the present invention, a part of the upper surface needs to be a foam exposed layer, and 3/4 to 1/4 of the upper surface area of the sealing material is preferably a foam exposed layer. When the butyl rubber coating layer covers the entire upper surface of the sealing material, the sealing material may be displaced or peeled off due to contact with the sealing material during positioning. In addition, if the butyl rubber layer coating exceeds 3/4, the sealing material may be displaced or peeled off. If the butyl rubber layer coating is less than 1/4, the displacement or peeling during positioning will not occur. There is a risk of later water stoppage.
The top surface from which the foam is exposed is either in a state where the butyl rubber layer is higher than the foam surface as shown in FIGS. 3 and 4, or in a state where the butyl rubber layer and the foam surface are at the same height as shown in FIGS. Is also effective in the practice of the present invention.
[0011]
Further, in the present butyl rubber composite sealing material, the use of water-expandable butyl rubber having adhesiveness as the adhesive butyl rubber is effective for the purpose of the present invention for further improving the water stopping performance. The water expansion ratio of the water-expandable butyl rubber is useful to be about 1.2 to 2 times, and when the water expansion ratio is less than 1.2 times, the water expansion function may not be sufficiently exerted and may exceed 2 times. In such a case, the resistance to water leakage due to rain water or the like may slightly decrease after the seal is attached.
[0012]
Hereinafter, the present invention will be described in more detail with examples.
Examples 1 and 3 , Comparative Examples 1-2 , Reference Examples 1-3
About the butyl rubber composite sealing material shown in Table 1 and FIGS. 1 to 6, (1) As a peel test, an adhesive (CRK bond S-203, chloroprene rubber solvent system) was applied to a concrete plate of 50 mm × 150 mm on the lower surface of the sealing material. After the application, each sealing material was bonded, and the operation of pressing on a concrete plate of the same size with a load of 500 g for 1 minute was repeated, and the number of times until peeling was measured. Further, the lower surface of the sealing material is bonded to the steel water-stop tester having an outer diameter of 500 cm shown in FIG. 7 with the above adhesive, and then compressed to 50% of the height of the sealing material using a spacer (compressed by 50%). Was added at 0.1 MPa × 3 minutes, and the presence or absence of water leakage and the change in pressure were measured. Moreover, about the peelability and water-stopping property, the comprehensive evaluation of favorable ((double-circle)) and some defect ((triangle | delta)) was performed.
[0013]
[Table 1]
[0014]
In Table 1, the width of the foam-exposed layer indicates the width of the upper surface portion of the cross section shown in FIGS. 3 to 6 that is not covered with the butyl rubber layer of the butyl rubber composite sealing material.
[0015]
【The invention's effect】
The butyl rubber composite sealing material of the present invention is very easy to install on concrete products and the like, and has excellent handling properties and water-stopping properties, so that it is extremely useful industrially.
[Brief description of the drawings]
1 is a cross-sectional view of a conventional butyl rubber composite sealing material. FIG. 2 is a cross-sectional view of a conventional butyl rubber composite sealing material. FIG. 3 is a butyl rubber in which a part of the upper surface (4) of the present invention is not covered with a butyl rubber layer. Composite sealing material [FIG. 4] A butyl rubber composite sealing material in which a part (4) of the upper surface of the present invention is not coated with a butyl rubber layer. [FIG. 5] A butyl rubber in which a part (4) of the upper surface of the present invention is not coated with a butyl rubber layer. Composite seal material [Fig. 6] A butyl rubber composite seal material in which part (4) of the upper surface of the present invention is not covered with a butyl rubber layer. [Fig. 7] Schematic diagram of a steel water stop tester used for water stop performance evaluation. Explanation of]
DESCRIPTION OF
Claims (3)
前記発泡体はJIS(C)硬度が20〜30であり、
前記粘着性ブチルゴムはJIS K−2530に準拠した20℃の針入度が60±10、引張り強さが0.05〜0.1MPaであり、
かつ、上面の一部に前記発泡体が露出しており、
該発泡体露出層の表面が粘着性ブチルゴム層よりも低く、発泡体露出層部分が凹んでいることを特徴とするブチルゴム複合シール材。In civil engineering and architectural still water sealing materials in which flexible foams made of synthetic rubber, natural rubber or thermoplastic resin are covered with adhesive butyl rubber.
The foam has a JIS (C) hardness of 20 to 30,
The adhesive butyl rubber has a penetration of 20 ° C. in accordance with JIS K-2530 of 60 ± 10 and a tensile strength of 0.05 to 0.1 MPa.
And the said foam is exposed to a part of upper surface,
A butyl rubber composite sealing material, wherein the surface of the foam exposed layer is lower than the adhesive butyl rubber layer , and the foam exposed layer portion is recessed.
Priority Applications (1)
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JP2000118858A JP4719336B2 (en) | 2000-04-20 | 2000-04-20 | Butyl rubber composite sealing material |
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JP2000118858A JP4719336B2 (en) | 2000-04-20 | 2000-04-20 | Butyl rubber composite sealing material |
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JP4719336B2 true JP4719336B2 (en) | 2011-07-06 |
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Families Citing this family (4)
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KR100511622B1 (en) * | 2002-09-19 | 2005-09-02 | 모야플라스틱 주식회사 | Rubber seal reinforced with fabric layer and Method for manufacturing the same |
CN100417847C (en) * | 2002-11-12 | 2008-09-10 | Nok株式会社 | Rubber-like elastic part |
KR100548767B1 (en) * | 2005-03-30 | 2006-02-02 | 이장원 | Butyl sealing material alleviated its primary adhesive |
KR101050834B1 (en) | 2010-12-16 | 2011-07-21 | 주식회사 비엔지컨설턴트 | Self adhesive butyl waterproofing sheet and the method for assembling cable troughs for the bridges of high-speed railroad by using the self adhesive butyl waterproofing sheet |
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JPS5816285A (en) * | 1981-07-23 | 1983-01-29 | フジタ工業株式会社 | Information display utilizing magnetic cement |
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JPS5816285U (en) * | 1981-07-23 | 1983-02-01 | 日東電工株式会社 | Sealing material for high loads |
JPS58160981U (en) * | 1982-04-22 | 1983-10-26 | 早川ゴム株式会社 | Patsukin material |
JPH01145470A (en) * | 1987-12-01 | 1989-06-07 | Yokohama Rubber Co Ltd:The | Sealing compound utilizing water swelling rubber and its manufacture |
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JPH0797562A (en) * | 1993-09-29 | 1995-04-11 | Aisin Chem Co Ltd | Pasty sealer and method of sealing between automotive body and weather strip |
JPH08319679A (en) * | 1995-05-24 | 1996-12-03 | Hayakawa Rubber Co Ltd | Primary waterstop material for precast concrete-made box |
JPH1060413A (en) * | 1996-08-23 | 1998-03-03 | Toyobo Co Ltd | Packing and stopping of flow of water using the same |
JPH10273645A (en) * | 1997-03-28 | 1998-10-13 | Nichias Corp | Joint sheet and its production |
JPH1163234A (en) * | 1997-08-08 | 1999-03-05 | Inoac Corp | Joint seal member |
JP2000110498A (en) * | 1998-10-07 | 2000-04-18 | Sumitomo Rubber Ind Ltd | Rubber gasket, and bonding structure of vertical shaft mouth part of underground tunnel using the same |
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JP2001304421A (en) | 2001-10-31 |
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