JP4886259B2 - Water-based adhesive - Google Patents
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- JP4886259B2 JP4886259B2 JP2005279400A JP2005279400A JP4886259B2 JP 4886259 B2 JP4886259 B2 JP 4886259B2 JP 2005279400 A JP2005279400 A JP 2005279400A JP 2005279400 A JP2005279400 A JP 2005279400A JP 4886259 B2 JP4886259 B2 JP 4886259B2
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Description
本発明は、水系接着剤に関する。 The present invention relates to an aqueous adhesive.
住宅、オフィスなどの建材用途や車両用途等に使用する接着剤において、従来はトルエン、メチルエチルケトン等の溶剤系接着剤が主であったが、近年の環境問題から無溶剤化の方向にあり、溶剤を含有しない水系接着剤等へ代替が進んでいる。しかしながら水系接着剤は耐水性、耐熱性が悪いといった問題があり、炭酸カルシウムなどの充填剤を水系接着剤中に添加して、耐水性、耐熱性を補うことがなされている。
一方、エチレン−酢酸ビニル共重合体エマルジョンとポリウレタンエマルジョンを主成分とする接着剤中に熱膨張性マイクロカプセル（微粒中空体）を添加して、接着性能を持続しながら、リサイクルするときは加熱により再剥離性を付与するようにした水系接着剤が提案されている（特許文献１参照）。
In the past, solvent-based adhesives such as toluene and methyl ethyl ketone were mainly used as adhesives for building materials such as houses and offices, and for vehicles, but due to environmental problems in recent years, there is a trend toward solvent-free. Substitution is progressing to water-based adhesives that do not contain. However, water-based adhesives have problems such as poor water resistance and heat resistance, and a filler such as calcium carbonate is added to the water-based adhesive to compensate for water resistance and heat resistance.
On the other hand, heat-expandable microcapsules (fine hollow bodies) are added to an adhesive mainly composed of an ethylene-vinyl acetate copolymer emulsion and a polyurethane emulsion. There has been proposed an aqueous adhesive that imparts removability (see Patent Document 1).
しかし、特許文献１に記載されている水系接着剤においては、以下のような問題がある。
すなわち、最近では被着材料として、表面に有機塗装を施した鋼板等、難接着材料も数多く使用されているため、エチレン−酢酸ビニル共重合体エマルジョンとポリウレタンエマルジョンと熱膨張性マイクロカプセルの混合物による水系接着剤では、プラスチックシートと多孔質ボードなどのオーバーレイ化粧板の接着には優れているものの、表面に有機塗装を施した鋼板等の難接着材料に対して接着力が不十分であるという問題がある。特に、高温・高湿度の環境下で応力のかかる部位に用いると、経時的に剥離する等の問題があった。
また、熱膨張性マイクロカプセルが混合されている場合には、スプレーなどで接着剤塗工時、スプレー先端に熱膨張性マイクロカプセルが詰まり、塗布量が安定しないなど作業性に問題がある。
However, the aqueous adhesive described in Patent Document 1 has the following problems.
In other words, recently, many difficult-to-adhere materials such as steel sheets with organic coating on the surface are used as the material to be adhered, so it depends on a mixture of ethylene-vinyl acetate copolymer emulsion, polyurethane emulsion and thermally expandable microcapsules. Water-based adhesives are excellent for bonding plastic sheets and overlay decorative boards such as porous boards, but have insufficient adhesion to difficult-to-bond materials such as steel sheets with organic coating on the surface. There is. In particular, there is a problem such as peeling over time when used in a place where stress is applied in an environment of high temperature and high humidity.
In addition, when thermally expandable microcapsules are mixed, there is a problem in workability such as when the adhesive is applied by spraying or the like, the thermally expandable microcapsules are clogged at the tip of the spray and the coating amount is not stable.
本発明は、上記事情に鑑みて、塗装鋼板面等への接着性、耐湿・耐熱性とスプレー塗工安定性が改善された水系接着剤を提供することを目的としている。 In view of the above circumstances, an object of the present invention is to provide a water-based adhesive having improved adhesion to a coated steel sheet surface, moisture resistance / heat resistance, and spray coating stability.
上記目的を達成するために、本発明の請求項１に記載の水系接着剤（以下、「請求項１の水系接着剤」と記す）は、クロロプレン樹脂を含有するクロロプレンラテックスを含み、未発泡の熱膨張性マイクロカプセルが分散されている水系接着剤であって、前記クロロプレンラテックスが、分子内にカルボキル基を有し、ｐＨが２〜９であるとともに、前記未発泡の熱膨張性マイクロカプセルは、発泡前の平均粒径が１〜２０μｍ、発泡後の平均粒径が４０〜１００μｍであり、クロロプレンラテックス樹脂分１００重量部に対して５〜５０重量部配合されていることを特徴とし、鋼板とプラスチック化粧板との接着に用いられる。 In order to achieve the above object, an aqueous adhesive according to claim 1 of the present invention (hereinafter referred to as “aqueous adhesive of claim 1”) includes a chloroprene latex containing a chloroprene resin, and is unfoamed. A water-based adhesive in which thermally expandable microcapsules are dispersed, wherein the chloroprene latex has a carboxyl group in the molecule and has a pH of 2 to 9, and the unexpanded thermally expandable microcapsules are The average particle diameter before foaming is 1 to 20 μm, the average particle diameter after foaming is 40 to 100 μm, and 5 to 50 parts by weight is blended with respect to 100 parts by weight of chloroprene latex resin , Used for bonding steel sheets and plastic decorative boards .
本発明の請求項２に記載の水系接着剤（以下、「請求項２の水系接着剤」と記す）は、請求項１の水系接着剤において、有機塗装鋼板とメラミン化粧板との接着に用いられることを特徴としている。 The water-based adhesive according to claim 2 of the present invention (hereinafter referred to as “water-based adhesive according to claim 2 ”) is used for bonding the organic coated steel sheet and the melamine decorative board in the water-based adhesive according to claim 1. It is characterized by being able to.
本発明の請求項３に記載の水系接着剤（以下、「請求項３の水系接着剤」と記す）は、請求項１の水系接着剤において、エポキシ塗装鋼板とメラミン化粧板との接着に用いられることを特徴としている。 The water-based adhesive according to claim 3 of the present invention (hereinafter referred to as “water-based adhesive according to claim 3 ”) is used for bonding the epoxy-coated steel sheet and the melamine decorative board in the water-based adhesive according to claim 1. It is characterized by being able to.
本発明において、クロロプレンラテックスとしては、特に限定されず市販されている製品を使用でき、例えば、分子内にカルボキシル基を有し、ＰＨが２〜９である東ソー社製、「７７０」「ＧＦＬ−８９０」、「ＧＦＬ−２８０」、電気化学工業社製、「ＬＣ−５０１」等を使用することができる。これらクロロプレンラテックスは、１種類又は何種類かを混ぜた混合物として用いることができる。 In the present invention, the chloroprene latex is not particularly limited, and a commercially available product can be used. For example, “770” “GFL-” manufactured by Tosoh Corporation having a carboxyl group in the molecule and a pH of 2 to 9 is available. 890 "," GFL-280 ", manufactured by Denki Kagaku Kogyo Co., Ltd.," LC-501 "and the like can be used. These chloroprene latexes can be used as a mixture of one kind or several kinds.
本発明で用いられる未発泡の熱膨張性マイクロカプセル(以下、「未発泡カプセル」と記す)としては、例えば、ポリ塩化ビニリデン、ポリ塩化ビニリデンとポリアクリロニトリルとの共重合体、ポリアクリロニトリル、アクリロニトリルとアクリル酸メチルとの共重合体などからなる殻部分の内部に、ブタン、ペンタン、ヘキサン等の気体または液体の炭化水素を含有する熱膨張性マイクロカプセルが挙げられる。また、未発泡カプセルの殻部分は、塗装鋼板面のエポキシ塗装面等の低極性面に対する濡れ性が改善され、接着性が向上する、ポリ塩化ビニリデンからなることが好ましい。 Examples of unexpanded thermally expandable microcapsules used in the present invention (hereinafter referred to as `` unfoamed capsules '') include, for example, polyvinylidene chloride, copolymers of polyvinylidene chloride and polyacrylonitrile, polyacrylonitrile, acrylonitrile and Thermally expandable microcapsules containing gas or liquid hydrocarbons such as butane, pentane, and hexane inside the shell portion made of a copolymer with methyl acrylate and the like can be mentioned. In addition, the shell portion of the unfoamed capsule is preferably made of polyvinylidene chloride, which improves wettability with respect to a low-polarity surface such as an epoxy-coated surface of the coated steel plate surface and improves adhesion.
本発明で用いられる未発泡カプセルは、発泡前の平均粒径が１〜２０μｍ、発泡後の平均粒径が４０〜１００μｍである。すなわち、発泡前の平均粒径が１μｍ未満であると、発泡後の平均粒径が十分大きなものとすることができず、塗装鋼板に対する接着性、耐湿・耐熱性が不足し、発泡前の平均粒径が２０μｍを超えると、接着剤をスプレー塗布した場合、スプレー先端に詰まりが発生し塗布量が安定しない虞がある。
一方、発泡後の平均粒径が４０μｍ未満であると、塗装鋼板に対する接着性、耐湿・耐熱性が不足し、発泡後の平均粒径が１００μｍを超えると、硬化皮膜の強度が低下する虞がある。
Unfoamed capsule used in the present invention, the average particle diameter before foamed is 1 to 20 [mu] m, average particle size after foaming is 40 to 100 [mu] m. That is, if the average particle size before foaming is less than 1 μm, the average particle size after foaming cannot be sufficiently large, the adhesion to the coated steel sheet, moisture resistance and heat resistance are insufficient, the average before foaming When the particle diameter exceeds 20 μm, when the adhesive is applied by spraying, there is a possibility that the tip of the spray is clogged and the applied amount is not stable.
On the other hand, if the average particle size after foaming is less than 40 μm, adhesion to the coated steel sheet, moisture resistance and heat resistance are insufficient, and if the average particle size after foaming exceeds 100 μm, the strength of the cured film may be reduced. is there.
未発泡カプセルの発泡開始温度は、特に限定されないが、８０〜１００℃が好ましい。発泡開始温度が８０℃未満であると、接着剤をスプレー塗布する前に発泡してしまい、スプレー先端に詰まりが発生し塗布量が安定しない虞があり、１００℃を超えると、後述する乾燥工程での発泡が不十分となり、塗装鋼板に対する接着性、耐湿・耐熱性が不足する虞がある。 Although the foaming start temperature of an unfoamed capsule is not specifically limited, 80-100 degreeC is preferable. If the foaming start temperature is less than 80 ° C., foaming may occur before the adhesive is applied by spraying, and the spray tip may become clogged and the coating amount may not be stable. Insufficient foaming may cause insufficient adhesion, moisture resistance, and heat resistance to the coated steel sheet.
上記のような好ましい条件に当てはまる未発泡カプセルとしては、例えば、大日精化社製、商品名「ダイフォームＬ３２０」、「ダイフォームＬ３３０」等の市販の製品を使用できる。 As an unfoamed capsule that satisfies the above-mentioned preferable conditions, for example, commercially available products such as trade names “Daifoam L320” and “Daifoam L330” manufactured by Dainichi Seika Co., Ltd. can be used.
未発泡カプセルの配合割合は、クロロプレンラテックス樹脂分１００重量部に対して、５〜５０重量部とする。
すなわち、未発泡カプセルの配合割合が５重量部未満であると、塗装鋼板等に対する接着性、耐湿・耐熱性が十分でなく、５０重量部を超えると接着性樹脂であるクロロプレンの割合が低下するため硬化皮膜の強度が大幅に低下する虞がある。
The mixing ratio of the unfoamed capsule against click Rollo-plane latex resin per 100 parts by weight, you 5-50 parts by weight.
That is, when the blending ratio of the unfoamed capsule is less than 5 parts by weight, the adhesiveness to the coated steel sheet and the moisture resistance and heat resistance are not sufficient, and when it exceeds 50 parts by weight, the ratio of chloroprene which is an adhesive resin decreases. Therefore, there exists a possibility that the intensity | strength of a cured film may fall significantly.
本発明の水系接着剤には、必要に応じて、以下の化合物が含有されてもよい。各種化合
物としては、例えば、架橋剤、ｐＨ調整剤、充填剤、粘着付与樹脂、酸化防止剤、老化防止剤、防カビ剤、着色剤、増粘剤、消泡剤、難燃剤、香料等が挙げられる。
The water-based adhesive of the present invention may contain the following compounds as necessary. Examples of the various compounds include cross-linking agents, pH adjusters, fillers, tackifier resins, antioxidants, anti-aging agents, anti-mold agents, colorants, thickeners, antifoaming agents, flame retardants, and fragrances. Can be mentioned.
本発明の水系接着剤を用いる方法としては、スプレー塗布などの塗工時は未発泡カプセルの状態で水系接着剤を塗布し、乾燥工程の加熱等により未発泡カプセルを発泡させ、例えば塗装鋼板とメラミン化粧板とを接着させて用いられる。従って、乾燥工程の温度は、未発泡カプセルが十分発泡するように、未発泡カプセルの発泡開始温度以上とすることが好ましい。 As a method of using the aqueous adhesive of the present invention, at the time of coating such as spray coating, the aqueous adhesive is applied in an unfoamed capsule state, and the unfoamed capsule is foamed by heating or the like in the drying process. Used by adhering to a melamine decorative board. Therefore, it is preferable that the temperature of the drying step be equal to or higher than the foaming start temperature of the unfoamed capsule so that the unfoamed capsule is sufficiently foamed.
本発明の水系接着剤は、鋼板とプラスチック化粧板との接着に用いられる。これらのなかでも、請求項２の接着剤のように、有機塗装鋼板とメラミン化粧板との接着により好適であり、請求項３の接着剤のように、エポキシ塗装鋼板とメラミン化粧板との接着に特に好適である。 Aqueous adhesive of the present invention is used for adhesion between the steel sheet and plastic veneer. Among these, the adhesive between the organic coated steel sheet and the melamine decorative board is suitable as in the adhesive according to claim 2 , and the adhesion between the epoxy coated steel sheet and the melamine decorative board as in the adhesive according to claim 3. Is particularly suitable.
本発明の水系接着剤では、接着性樹脂としてクロロプレン樹脂を含有するクロロプレンラテックスを使用しているので、表面に有機塗装を施した鋼板等の難接着材料に対して接着力が向上する。すなわち、クロロプレンラテックスが高い皮膜柔軟性、幅広い被着体への接着性、優れたコンタクト接着性など優れている。
また、未発泡カプセルが含有されているので、スプレー塗布安定性が優れている。そして、塗布後、乾燥時等に加熱し、未発泡カプセルを膨張させれば、接着剤の硬化皮膜への湿気の進入を防ぐ等の効果があるので、耐湿・耐熱性が大幅に向上する。
In the water-based adhesive of the present invention, chloroprene latex containing a chloroprene resin is used as an adhesive resin, so that the adhesive force is improved with respect to difficult-to-adhere materials such as steel sheets with organic coating on the surface. That is, chloroprene latex has excellent film flexibility, adhesion to a wide range of adherends, and excellent contact adhesion.
Moreover, since the non-foamed capsule is contained, the spray coating stability is excellent. And if it heats at the time of drying after application | coating, and an unfoamed capsule is expanded, since there exists an effect, such as preventing the penetration | invasion of the moisture to the cured film of an adhesive agent, moisture resistance and heat resistance improve significantly.
また、未発泡カプセルとして、発泡前の平均粒径が１〜２０μｍ、発泡後の平均粒径が４０〜１００μｍであるものを用いるので、スプレー塗布する際に、スプレー先端に詰まりがより少なく、安定した接着強度を確保することができる。 In addition , as an unfoamed capsule, one having an average particle diameter before foaming of 1 to 20 μm and an average particle diameter after foaming of 40 to 100 μm is used . The obtained adhesive strength can be ensured.
さらに、未発泡カプセルの配合割合をクロロプレンラテックス樹脂分１００重量部に対して、５〜５０重量部としているので、より確実に、塗装鋼板等に対する接着性、耐湿・耐熱性を十分なものとすることができる。 Furthermore , since the blending ratio of the unfoamed capsule is 5 to 50 parts by weight with respect to 100 parts by weight of the chloroprene latex resin, the adhesiveness to the coated steel sheet, moisture resistance and heat resistance are more sufficient. It can be.
以下に、本発明の具体的な実施例をその比較例と対比させて詳しく説明する。なお、本発明は、以下の実施例に限定されるものではない。 Hereinafter, specific examples of the present invention will be described in detail in comparison with comparative examples. The present invention is not limited to the following examples.
（実施例１）
クロロプレンラテックス水分散液（東ソー社製、「スカイプレン７７０」）に、この水分散液中のクロロプレンポリマーを固形分換算で１００重量部に対し、未発泡カプセルとして大日精化社製「ダイフォームＬ３２０（発泡前の平均粒径：１５μｍ、発泡後の平均粒径：６０μｍ、発泡開始温度：約９０℃）」１４重量部、粘着付与樹脂としての荒川化学工業社製「Ｅ−１００」を固形分換算で１００重量部、架橋剤としての大崎工業社製水性亜鉛華「ＡＺ−ＳＷ」５重量部を配合しミキサーにて混合して水系接着剤を得た。
Example 1
In an aqueous dispersion of chloroprene latex (“Skyprene 770” manufactured by Tosoh Corporation), 100 parts by weight of the chloroprene polymer in the aqueous dispersion is converted into an unfoamed capsule “Daifoam L320”. (Average particle diameter before foaming: 15 μm, average particle diameter after foaming: 60 μm, foaming start temperature: about 90 ° C.) ”14 parts by weight,“ E-100 ”manufactured by Arakawa Chemical Industries, Ltd. as a tackifier resin 100 parts by weight in terms of conversion and 5 parts by weight of aqueous zinc white “AZ-SW” manufactured by Osaki Kogyo Co., Ltd. as a cross-linking agent were blended and mixed with a mixer to obtain an aqueous adhesive.
（実施例２）
未発泡カプセルである大日精化社製「ダイフォームＬ３２０」の添加量を７重量部にかえたこと以外は実施例１と同様にして水系接着剤を得た。
(Example 2)
A water-based adhesive was obtained in the same manner as in Example 1, except that the amount of “Daifoam L320” manufactured by Dainichi Seika Co., Ltd., which was an unfoamed capsule, was changed to 7 parts by weight.
(実施例３）
未発泡カプセルである大日精化社製「ダイフォームＬ３２０」の添加量を４５重量部にかえたこと以外は実施例１と同様にして水系接着剤を得た。
Example 3
A water-based adhesive was obtained in the same manner as in Example 1 except that the amount of “Daifoam L320” manufactured by Dainichi Seika Co., Ltd., which was an unfoamed capsule, was changed to 45 parts by weight.
（比較例１）
未発泡カプセルを配合しなかったこと以外は実施例１と同様にして水系接着剤を得た。
(Comparative Example 1)
A water-based adhesive was obtained in the same manner as in Example 1 except that the unfoamed capsule was not blended.
(比較例２)
未発泡カプセルである大日精化社製「ダイフォームＬ３２０」の代わりに、大日精化社製「ダイフォームＬ３２０」を発泡させた発泡済み熱膨張性マイクロカプセル(平均粒径６０μｍ)を用いたこと以外は実施例１と同様にして水系接着剤を得た。
(Comparative Example 2)
Instead of “Daifoam L320” manufactured by Dainichi Seika Co., Ltd., which is an unfoamed capsule, foamed thermally expandable microcapsules (average particle size 60 μm) obtained by foaming “Daifoam L320” manufactured by Dainichi Seika Co., Ltd. were used. A water-based adhesive was obtained in the same manner as Example 1 except for the above.
実施例１〜実施例３および比較例１，２で得た水系接着剤について、メラミン板及びエポキシ塗装を施した鋼板の表面にそれぞれスプレーで塗布量がそれぞれの面で８０ｇ／ｍ2となるように塗布し、１５０℃で３分間乾燥させた後、直ちにロールプレスにより圧着し、２３℃、５０％ＲＨの室内にて３日間養生した。そして、以下の試験方法により、常態接着強度、湿熱後接着強度を評価し、その結果を表１に示した。また、以下の評価方法で求めた、スプレー塗工性についてもその結果を表１に併せて示した。 About the water-based adhesives obtained in Examples 1 to 3 and Comparative Examples 1 and 2, the application amount is 80 g / m 2 on each surface by spraying on the surface of the steel plate subjected to melamine plate and epoxy coating, respectively. After being applied to the substrate and dried at 150 ° C. for 3 minutes, it was immediately pressed by a roll press and cured in a room at 23 ° C. and 50% RH for 3 days. Then, the normal bond strength and post-wet heat bond strength were evaluated by the following test methods, and the results are shown in Table 1. Further, the results of spray coating properties obtained by the following evaluation methods are also shown in Table 1.
（評価方法）
（常態接着強度）
上記の養生後試験片について、Ｔ字型治具をエポキシ接着剤貼り付け、引張速度１０ｍｍ／ｍｉｎ．にて平面に沿った方向で引張り試験を実施し、最大引張り強度を求めた。
(Evaluation methods)
(Normal adhesive strength)
For the post-curing test piece, a T-shaped jig was attached with an epoxy adhesive, and a tensile speed of 10 mm / min. The tensile test was carried out in the direction along the plane at to obtain the maximum tensile strength.
（湿熱後接着強度）
上記の養生後試験片を、さらに４５℃、９５％ＲＨの条件下に４８時間置き、取り出し
後、直ちにＴ字型治具を貼り付け、引張速度１０ｍｍ／ｍｉｎ．にて平面に沿った方向で引張り試験を実施し、最大引張り強度を求めた。
(Adhesive strength after wet heat)
The test piece after curing was further placed under conditions of 45 ° C. and 95% RH for 48 hours, and after taking out, a T-shaped jig was immediately attached, and a tensile speed of 10 mm / min. The tensile test was carried out in the direction along the plane at to obtain the maximum tensile strength.
(スプレー塗工性)
水系接着剤をメラミン板へ５分間隔で１分間スプレー塗布し、６回スプレー後の塗布量の変化率を計測し、以下の式により、塗布量維持率を求めた。
塗布量維持率＝(６回目スプレー時の塗布量)/（１回目スプレー時の塗布量)×１００
(Spray coatability)
The aqueous adhesive was spray-applied to the melamine plate for 1 minute at intervals of 5 minutes, the change rate of the coating amount after spraying 6 times was measured, and the coating amount maintenance rate was determined by the following formula.
Application amount maintenance rate = (application amount at the sixth spray) / (application amount at the first spray) × 100
実用的には常態で１００Ｎ/ｃｍ2以上、湿熱後で６０Ｎ/ｃｍ2以上の接着強度、スプレー塗布量維持率については９０％が必要であるが、表１に示すように、実施例１〜実施例３の接着剤はすべてこの条件を満足している。 Practically, 100N / cm 2 or more in a normal state, 60N / cm 2 or more after wet heat, and 90% is necessary for the spray coating amount maintenance rate. All the adhesives of Example 3 satisfy this condition.
本発明にかかる水系接着剤は、特に限定されないが、たとえば、住宅、オフィス等に用いられる建材用途や車両用途等に使用することができる。 Although the water-based adhesive concerning this invention is not specifically limited, For example, it can be used for the building material use used for a house, an office, etc., a vehicle use, etc.
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| KR20180066813A (en) * | 2016-12-09 | 2018-06-19 | 테사 소시에타스 유로파에아 | Pressure sensitive strip |
| KR20180066814A (en) * | 2016-12-09 | 2018-06-19 | 테사 소시에타스 유로파에아 | Pressure sensitive adhesive strip |
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| WO2025192198A1 (en) * | 2024-03-11 | 2025-09-18 | 日東電工株式会社 | Aqueous dispersion-type pressure-sensitive adhesive agent composition and pressure-sensitive adhesive sheet |
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| JPS56161483A (en) * | 1980-05-16 | 1981-12-11 | Kanebo N S C Kk | Adhesive composition for foam and bonding method |
| EP0451998A3 (en) * | 1990-04-02 | 1992-06-17 | E.I. Du Pont De Nemours And Company | Process for stabilizing chloroprene copolymer latex |
| JP3294910B2 (en) * | 1993-07-23 | 2002-06-24 | 電気化学工業株式会社 | Polychloroprene latex composition |
| JP4552301B2 (en) * | 1999-09-30 | 2010-09-29 | マツダ株式会社 | LAMINATE, PROCESS FOR PRODUCING THE SAME, AND THERMOPLASTIC FOAM ADHESIVE |
| JP2002121517A (en) * | 2000-10-12 | 2002-04-26 | Denki Kagaku Kogyo Kk | Bonded structure and bonding method |
| JP3413401B2 (en) * | 2000-10-23 | 2003-06-03 | 松下電工株式会社 | Removable laminate and method for removing the same |
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| KR20180066813A (en) * | 2016-12-09 | 2018-06-19 | 테사 소시에타스 유로파에아 | Pressure sensitive strip |
| KR20180066814A (en) * | 2016-12-09 | 2018-06-19 | 테사 소시에타스 유로파에아 | Pressure sensitive adhesive strip |
| KR101978723B1 (en) | 2016-12-09 | 2019-05-15 | 테사 소시에타스 유로파에아 | Pressure sensitive adhesive strip |
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