JP3768385B2 - Adhesion method using moisture curable adhesive - Google Patents
Adhesion method using moisture curable adhesive Download PDFInfo
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- JP3768385B2 JP3768385B2 JP2000174787A JP2000174787A JP3768385B2 JP 3768385 B2 JP3768385 B2 JP 3768385B2 JP 2000174787 A JP2000174787 A JP 2000174787A JP 2000174787 A JP2000174787 A JP 2000174787A JP 3768385 B2 JP3768385 B2 JP 3768385B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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- Lining Or Joining Of Plastics Or The Like (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、湿気硬化型接着剤を用いる接着方法、詳しくは湿気（水分）透過性のない塩化ビニル樹脂系組成物からなる被着材、即ち塩化ビニル樹脂単独又は塩化ビニル樹脂を主成分とする組成物からなる被着材（以下、ＰＶＣ被着材という。）同志を湿気硬化型接着剤を用いて接着する方法に関する。
【０００２】
【従来の技術】
従来より、湿気（水分）透過性のない被着材同志を湿気硬化形接着剤を用いて接着する場合には、硬化に必要な湿気（水分）の供給は次の▲１▼〜▲４▼の方法でおこなっている。
▲１▼被着材に塗布する前に、接着剤に必要量の水を混入しておく。
▲２▼被着材に塗布する前に、接着剤に水を保持した坦体を分散しておく。
▲３▼接着剤を塗布後オープンタイムを取り、接着剤に空気中の湿気を供給した後貼り合わせる。
▲４▼接着剤を塗布後、接着剤面又はもう片方の被着材面に水を噴霧する等して強制的に水分を供給した後貼り合わせる。
しかしながら、これらの従来技術には夫々以下の欠点があるため、接着作業が能率的に行えない、又は充分な接着力が発揮できないという問題があった。
前記▲１▼〜▲２▼は、水又は水を保持した坦体を接着剤に分散する工程が増え、しかも接着剤の可使時間も短くなる。
前記▲３▼は、オープンタイムを取る時間が必要となり、その上接着力が充分でない。
前記▲４▼は、接着剤面への水の濡れが悪く、均一に硬化せず、充分な接着力を発揮できない。
【０００３】
【発明が解決しようとする課題】
本発明の課題は、被着体から湿気（水分）が供給されないＰＶＣ被着材同志を湿気硬化形接着剤を用いて接着する際に、前記したような欠点が全くなく、より効率的で強力な接着力を発揮することのできる接着方法を提供することである。
【０００４】
【課題を解決するための手段】
前記した課題を解決するために、本発明の湿気硬化型接着剤を用いるＰＶＣ被着材同志の接着方法では、▲１▼一方の被着材面に塗布した接着剤の表面、及び／又は接着剤を塗布していない他方の被着材面に、接着性を有するポリマーエマルジョンを塗布あるいは噴霧し、その後被着材同志を貼り合わせるか、あるいは▲２▼一方の被着材面に塗布した接着剤の表面、及び／又は他方の被着材面に塗布した接着剤の表面に、接着性を有するポリマーエマルジョンを塗布あるいは噴霧し、その後被着材同志を貼り合わせるようにしたものである。
【０００５】
本発明で使用する湿気硬化型接着剤としては、（ａ）変成シリコーン系接着剤（例えば、特開昭６３−１１２６４２号公報参照）が好ましい。
本発明に使用するポリマーエマルジョンとしては、エチレン・酢酸ビニル共重合体（ＥＶＡ）系エマルジョン、ウレタン樹脂系エマルジョン、又はこれらのブレンド物が使用できるが、特にエチレン・酢酸ビニル共重合体（ＥＶＡ）系エマルジョン／ウレタン樹脂系エマルジョンの混合物が好ましい。
また、このポリマーエマルジョンには、タッキフアイヤー、可塑剤、少量の有機溶剤、増粘剤、界面活性剤、フイラー、防腐剤、防黴剤、ＰＨ調整剤等が配合されていても良い。ポリマーエマルジョンの濃度はポリマー分として１〜７５ｗｔ％のものが使用できるが、塗布方法により好適な濃度を適宜選択できる。
【０００６】
本発明の接着方法は、次の▲１▼〜▲５▼の具体的態様を含むものである。
▲１▼一方のＰＶＣ被着材面にのみ塗布した接着剤の表面にだけ、ポリマーエマルジョンを塗布し、その後ＰＶＣ被着材同志を貼り合わせる接着方法。
▲２▼接着剤を塗布していない他方のＰＶＣ被着材面にだけ、ポリマーエマルジョンを塗布し、その後ＰＶＣ被着材同志を貼り合わせる接着方法。
▲３▼一方のＰＶＣ被着材面にのみ塗布した接着剤の表面に、ポリマーエマルジョンを塗布し、また他方のＰＶＣ被着材面に、ポリマーエマルジョンを塗布し、その後ＰＶＣ被着材同志を貼り合わせる接着方法。
▲４▼一方のＰＶＣ被着材面に塗布した接着剤の表面にだけ、ポリマーエマルジョンを塗布し、その後他方のＰＶＣ被着材面に塗布した接着剤の表面と貼り合わせる接着方法。
▲５▼一方のＰＶＣ被着材面に塗布した接着剤の表面に、ポリマーエマルジョンを塗布し、他方のＰＶＣ被着材面に塗布した接着剤の表面にも、ポリマーエマルジョンを塗布し、その後両者を貼り合わせる接着方法。
前記▲１▼〜▲５▼の中、作業効率、コスト等を考慮すると、前記▲１▼又は▲２▼の接着方法が好ましい。
【０００７】
本発明の湿気硬化型接着剤の被着材面への塗布手段としては、例えばローラ、ロールスプレッダー、ハケ、スプレー等が用いられる。湿気硬化型接着剤の塗布量は、５０〜２０００、好ましくは１００〜１０００ｇ／ｍ2 である。
本発明の接着性を有するポリマーエマルジョンの塗布手段としては、例えばローラ、ロールスプレッダー、ハケ、スプレー等が用いられるが、中でもスプレーが好ましい。ポリマーエマルジョンの塗布量は、５〜２００、好ましくは１０〜１００ｇ／ｍ2 である。
本発明の接着性を有するポリマーエマルジヨン塗布後の両被着材の貼り合わせのタイミングは、その直後でもオープンタイムを取ってからでも良い。オープンタイムの時間は、好ましくは生乾き〜半乾きとなる程度の時間であるが、これに何ら限定されない。
【０００８】
【実施例】
次に、本発明を実施例を以て詳しく説明するが、本発明はこれらの実施例に限定されないことはいうまでもない。
なお、引張接着強さの測定及びプライマーの製造（製造例１〜７）は、以下の方法に拠った。
〈引張接着強さ〉
幅１００ｍｍ×長さ１００ｍｍの被着体の片面にエポキシ樹脂系接着剤を用いて、予め鉄製アタッチメントを接着しておく（被着体がプラスチックの場合はプライマー（プライマー８０、コニシ（株）製）処理してから接着する）。次に、被着体の鉄製アタッチメントを接着してない面を、幅３００ｍｍ×長さ３００ｍｍの他の被着体に、表２に記載の接着剤／プライマーの仕様で接着し、所定時間養生（２３℃）後、鉄製アタッチメントに建研式引張試験機をセットし、１秒間に約１０ｋｇの荷重速度で引張荷重を加え、破壊に至るまでの最大荷重（ｋｇｆ単位）を測定し、これに基づいて引張接着強さ（Ｎ／ｍｍ2）を算出した。表２の測定数値の単位はＮ／ｍｍ2である。
〈プライマーの製造（製造例１〜７）〉
エチレン酢酸ビニル樹脂エマルジョン（商品名エバディックＥＰ１１、不揮発分５２％、大日本インキ化学工業（株）製）に１重量％のアンモニア水を添加混合し中和する。この中和物とウレタンエマルジョン（商品名ハイドランＨＷ３１１、不揮発分４５％、大日本インキ化学工業（株）製）および水道水を表１の割合で混合撹拌し、製造例１〜７のプライマーを調製した。
【０００９】
【表１】
【実施例１】
幅３００ｍｍ×長さ３００ｍ×厚さ１５ｍｍの塩ビ板に１液湿気硬化形変成シリコーン系接着剤（商品名サイレックス２００、コニシ（株）製）を塗布し、一方、幅１００ｍｍ×長さ１００ｍｍ×厚さ１５ｍｍの塩ビ板に、製造例１で製造したプライマー（エチレン酢酸ビニルエマルジョン／ウレタンエマルジョン／水＝０／１００／３５０）をスプレー塗布し、両者を貼り合わせ圧締した。１日養生後、引張接着強さを測定したところ、被着体の中心部まで接着剤が硬化しており、十分な接着強さを示した。破壊状態は凝集破壊を示し、接着性も良好であった。引張接着強さの測定値は次の表２に示されている。
【００１１】
【実施例２〜７】
製造例１のプライマーを塗布する代わりに、製造例２〜７のプライマーを塗布する以外は実施例１と同様に接着養生し、接着強さを測定したところ、どの試験体も被着体の中心部まで接着剤が硬化しており、十分な接着強さを示した。破壊状態は凝集破壊を示し、接着性も良好であった。引張接着強さの測定値は次の表２に示されている。
【００１２】
【比較例１】
プライマーとしてスチレンブタジエン系ラテックス（商品名ラテックス０６６８、不揮発分４８％、ＪＳＲ（株）製を不揮発分が１０％となるように水で希釈したもの）をスプレー塗布する以外は実施例１と同様に接着養生し、接着強さを測定したところ、接着剤とプライマーを塗布した塩ビの界面で破壊し、接着強さは低い値を示した。引張接着強さの測定値は次の表２に示されている。
【００１３】
【比較例２】
プライマーとしてクロロプレンラテックス（商品名デンカクロロプレンラテックスＬＡ−５０、不揮発分５０％、電気化学工業（株）製を不揮発分が１０％となるように水で希釈したもの）をスプレー塗布する以外は実施例１と同様に接着養生し、接着強さを測定したところ、接着剤とプライマーを塗布した塩ビの界面で破壊し、接着強さは低い値を示した。。引張接着強さの測定値は次の表２に示されている
【比較例３】
プライマーとして酢酸ビニル樹脂エマルジョン（商品名ボンドＣＨ１８、不揮発分４１％、コニシ（株）製を不揮発分が１０％となるように水で希釈したもの）をスプレー塗布する以外は実施例１と同様に接着養生し、接着強さを測定したところ、接着剤とプライマーを塗布した塩ビの界面で破壊し、接着強さは低い値を示した。引張接着強さの測定値は次の表２に示されている
【００１４】
【比較例４】
プライマーとして水をスプレー塗布する以外は実施例１と同様に接着養生し、接着強さを測定したところ、接着剤未硬化の部分が存在し、接着強さは低い値を示した。引張接着強さの測定値は次の表２に示されている
【００１５】
【比較例５】
一方の塩ビ板に何も塗布せず、他方の接着剤を塗布した塩ビ板を、大気（２３℃、ＲＨ６０％、）中に３分間放置した後、両者を貼り合わせる以外は実施例１と同様に接着養生し、引張接着強さを測定したところ、接着剤未硬化の部分が存在し、接着強さは低い値を示した。引張接着強さの測定値は次の表２に示されている
【００１６】
【表２】
【発明の効果】
本発明の接着方法によれば、被着体から湿気（水分）が供給されないＰＶＣ被着材同志を湿気硬化形接着剤を用いて接着するに当たり、接着剤に水を混合する必要がないので、工程が短縮できる、又水噴霧と比較して湿気硬化形接着剤を均一に硬化させることができるので接着強さも遙かに高く、したがってより効率的で優れた接着力を発揮することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an adhesion method using a moisture curable adhesive, and more specifically, an adherend composed of a vinyl chloride resin-based composition having no moisture (moisture) permeability, that is, a vinyl chloride resin alone or a vinyl chloride resin as a main component. The present invention relates to a method for adhering an adherend made of a composition (hereinafter referred to as a PVC adherend) using a moisture-curable adhesive.
[0002]
[Prior art]
Conventionally, when adhering materials that are not permeable to moisture (moisture) are bonded using a moisture-curing adhesive, the supply of moisture (moisture) necessary for curing is as follows (1) to (4). It is done by the method of.
{Circle around (1)} Before applying to the adherend, a necessary amount of water is mixed in the adhesive.
{Circle around (2)} Before applying to the adherend, a carrier holding water is dispersed in the adhesive.
(3) After applying the adhesive, take an open time, and supply the moisture in the air to the adhesive before bonding.
(4) After applying the adhesive, forcibly supplying water by spraying water on the adhesive surface or the other adherend surface and then bonding.
However, each of these conventional techniques has the following drawbacks, and there is a problem that the bonding operation cannot be performed efficiently or sufficient bonding force cannot be exhibited.
In the above (1) to (2), the step of dispersing water or a carrier holding water in the adhesive is increased, and the usable time of the adhesive is also shortened.
The above (3) requires time to take an open time, and the adhesive strength is not sufficient.
In the case of (4), the wettability of water on the adhesive surface is poor, it does not cure uniformly, and sufficient adhesive force cannot be exhibited.
[0003]
[Problems to be solved by the invention]
The object of the present invention is to provide a more efficient and powerful solution without any disadvantages as described above when bonding PVC adherends to which moisture (moisture) is not supplied from the adherend using a moisture-curing adhesive. It is to provide an adhesion method capable of exerting a sufficient adhesion force.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the bonding method of PVC adherends using the moisture curable adhesive of the present invention, (1) the surface of the adhesive applied to one adherend surface and / or adhesion Apply or spray an adhesive polymer emulsion to the other adherend surface to which the agent is not applied, and then bond the adherends together, or (2) Adhesion applied to one adherend surface A polymer emulsion having adhesiveness is applied or sprayed on the surface of the agent and / or the surface of the adhesive applied to the other surface of the adherend, and then the adherends are bonded together.
[0005]
As the moisture curable adhesive used in the present invention , (a) a modified silicone adhesive (see, for example, JP-A-63-112642 ) is preferable.
As the polymer emulsion used in the present invention, an ethylene / vinyl acetate copolymer (EVA) emulsion, a urethane resin emulsion, or a blend thereof can be used. An emulsion / urethane resin emulsion mixture is preferred.
The polymer emulsion may contain a tackifier, a plasticizer, a small amount of an organic solvent, a thickener, a surfactant, a filler, an antiseptic, an antifungal agent, a pH adjuster, and the like. The concentration of the polymer emulsion can be 1 to 75 wt% as the polymer content, but a suitable concentration can be appropriately selected depending on the coating method.
[0006]
The bonding method of the present invention includes the following specific embodiments (1) to (5).
(1) An adhesion method in which a polymer emulsion is applied only to the surface of an adhesive applied only to one PVC substrate, and then the PVC substrates are bonded together.
(2) An adhesion method in which a polymer emulsion is applied only to the other PVC adherend surface not coated with an adhesive, and then the PVC adherends are bonded together.
(3) Apply a polymer emulsion to the surface of the adhesive applied to only one PVC substrate, apply a polymer emulsion to the other PVC substrate, and then paste the PVC substrates together. Bonding method to match.
(4) An adhesion method in which a polymer emulsion is applied only to the surface of the adhesive applied to one PVC adherend surface, and then bonded to the surface of the adhesive applied to the other PVC adherend surface.
(5) A polymer emulsion is applied to the surface of the adhesive applied to one PVC adherend, and the polymer emulsion is applied to the surface of the adhesive applied to the other PVC adherend. Adhesion method to stick together.
Among the above (1) to (5), in consideration of work efficiency, cost, etc., the bonding method of the above (1) or (2) is preferable.
[0007]
As a means for applying the moisture curable adhesive of the present invention to the adherend surface, for example, a roller, a roll spreader, a brush, a spray or the like is used. The application amount of the moisture curable adhesive is 50 to 2000, preferably 100 to 1000 g / m 2 .
As a means for applying the adhesive polymer emulsion of the present invention, for example, a roller, a roll spreader, a brush, a spray or the like is used, and among these, a spray is preferable. The coating amount of the polymer emulsion, from 5 to 200, preferably from 10 to 100 g / m 2.
The timing of laminating both adherends after the application of the polymer emulsion having adhesiveness according to the present invention may be just after that or after taking an open time. The time of the open time is preferably a time to be freshly dried to semi-dried, but is not limited to this.
[0008]
【Example】
Next, the present invention will be described in detail with reference to examples, but it goes without saying that the present invention is not limited to these examples.
In addition, the measurement of tensile adhesive strength and manufacture of a primer (manufacture examples 1-7) were based on the following methods.
<Tensile bond strength>
Adhere an iron attachment to one side of an adherend of width 100 mm x length 100 mm beforehand using an epoxy resin adhesive (if the adherend is plastic, primer (Primer 80, manufactured by Konishi Co., Ltd.)) After processing). Next, the surface to which the iron attachment of the adherend is not bonded is bonded to another adherend having a width of 300 mm × a length of 300 mm in accordance with the adhesive / primer specifications shown in Table 2, and cured for a predetermined time ( 23 ℃), set Kenken-type tensile tester on the iron attachment, apply a tensile load at a load speed of about 10kg per second, measure the maximum load (kgf unit) until failure, and based on this The tensile bond strength (N / mm 2 ) was calculated. The unit of the measured numerical values in Table 2 is N / mm 2 .
<Manufacture of primers (Production Examples 1 to 7)>
An ethylene vinyl acetate resin emulsion (trade name Evadic EP11, nonvolatile content 52%, manufactured by Dainippon Ink & Chemicals, Inc.) is added and neutralized by adding 1% by weight of ammonia water. This neutralized product, urethane emulsion (trade name: Hydran HW311, non-volatile content: 45%, manufactured by Dainippon Ink & Chemicals, Inc.) and tap water were mixed and stirred at the ratios shown in Table 1 to prepare the primers for Production Examples 1-7. did.
[0009]
[Table 1]
[Example 1]
A one-part moisture-curing modified silicone-based adhesive (trade name Silex 200, manufactured by Konishi Co., Ltd.) is applied to a vinyl chloride plate having a width of 300 mm, a length of 300 m, and a thickness of 15 mm, while width 100 mm × length 100 mm × thickness. The primer (ethylene vinyl acetate emulsion / urethane emulsion / water = 0/100/350) produced in Production Example 1 was spray-coated on a 15 mm thick PVC plate, and both were bonded and pressed together. When the tensile bond strength was measured after curing for 1 day, the adhesive was cured to the center of the adherend, indicating a sufficient bond strength. The fracture state showed cohesive fracture and good adhesion. The measured values of tensile bond strength are shown in Table 2 below.
[0011]
Examples 2-7
Instead of applying the primer of Production Example 1, except that the primers of Production Examples 2 to 7 were applied, adhesive curing was performed in the same manner as in Example 1, and the adhesive strength was measured. The adhesive was cured up to the part and showed sufficient adhesive strength. The fracture state showed cohesive fracture and good adhesion. The measured values of tensile bond strength are shown in Table 2 below.
[0012]
[Comparative Example 1]
As in Example 1, except that styrene butadiene latex (trade name latex 0668, non-volatile content 48%, manufactured by JSR Co., Ltd. diluted with water so that the non-volatile content is 10%) was spray-coated as a primer. When the adhesive was cured and the adhesive strength was measured, it was broken at the vinyl chloride interface coated with the adhesive and the primer, and the adhesive strength showed a low value. The measured values of tensile bond strength are shown in Table 2 below.
[0013]
[Comparative Example 2]
Example except that chloroprene latex (trade name Denka Chloroprene Latex LA-50, non-volatile content 50%, manufactured by Denki Kagaku Kogyo Co., Ltd. diluted with water so that the non-volatile content becomes 10%) was spray applied as a primer. Adhesive curing was conducted in the same manner as in No. 1 and the adhesive strength was measured. As a result, the adhesive was broken at the vinyl chloride interface coated with the adhesive and the primer, and the adhesive strength was low. . The measured values of tensile bond strength are shown in the following Table 2. [Comparative Example 3]
As in Example 1 except that a vinyl acetate resin emulsion (trade name Bond CH18, non-volatile content 41%, manufactured by Konishi Co., Ltd. diluted with water so that the non-volatile content is 10%) is spray-coated as a primer. When the adhesive was cured and the adhesive strength was measured, it was broken at the vinyl chloride interface coated with the adhesive and the primer, and the adhesive strength showed a low value. The measured values of tensile bond strength are shown in Table 2 below.
[Comparative Example 4]
Except for spray application of water as a primer, adhesive curing was performed in the same manner as in Example 1, and the adhesive strength was measured. As a result, an uncured part of the adhesive was present and the adhesive strength showed a low value. The measured values of the tensile bond strength are shown in the following Table 2.
[Comparative Example 5]
Example 1 except that nothing is applied to one PVC plate and the PVC plate with the other adhesive applied is left in the atmosphere (23 ° C., RH 60%) for 3 minutes and then bonded together. The adhesive was cured and the tensile bond strength was measured. As a result, an uncured portion of the adhesive was present, and the bond strength showed a low value. The measured values of tensile bond strength are shown in Table 2 below.
[Table 2]
【The invention's effect】
According to the bonding method of the present invention, it is not necessary to mix water in the adhesive when bonding the PVC adherents to which moisture (moisture) is not supplied from the adherend using the moisture-curing adhesive. Since the process can be shortened and the moisture-curing adhesive can be uniformly cured as compared with water spraying, the adhesive strength is much higher, and therefore, more efficient and excellent adhesive force can be exhibited.
Claims (5)
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| JP2000174787A JP3768385B2 (en) | 2000-06-12 | 2000-06-12 | Adhesion method using moisture curable adhesive |
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| JP2000174787A JP3768385B2 (en) | 2000-06-12 | 2000-06-12 | Adhesion method using moisture curable adhesive |
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| JP2001354914A JP2001354914A (en) | 2001-12-25 |
| JP3768385B2 true JP3768385B2 (en) | 2006-04-19 |
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| JP4721632B2 (en) * | 2003-10-07 | 2011-07-13 | コニシ株式会社 | Two-component fractional application type contact adhesive and method of using the same |
| JP2008007777A (en) * | 2006-06-28 | 2008-01-17 | Kaneka Corp | Honeymoon adhesive consisting of two different components, adhesion system using the adhesive, product and use thereof |
| DE102011012351B3 (en) * | 2011-02-24 | 2012-05-10 | Ortwein Gmbh | Method for fixing an object to a base by means of a fastening means |
| JP2013025931A (en) * | 2011-07-19 | 2013-02-04 | Auto Network Gijutsu Kenkyusho:Kk | Anti-corrosion agent, covered wire with terminal, and wiring harness |
| JP6980985B2 (en) * | 2015-11-11 | 2021-12-15 | セメダイン株式会社 | Base adjustment method and interior / exterior construction method |
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