JP2006265430A - High-strength double-sided pressure-sensitive adhesive tape - Google Patents
High-strength double-sided pressure-sensitive adhesive tape Download PDFInfo
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Abstract
Description
本発明は、発泡樹脂製シート状支持体の両面に感圧接着剤層を積層してなる両面粘着テープに関し、特に、支持体の物性が優れているため、長期間に亙って高接着強度を維持する両面粘着テープに関するものである。 The present invention relates to a double-sided pressure-sensitive adhesive tape in which a pressure-sensitive adhesive layer is laminated on both sides of a foamed resin sheet-like support, and in particular, since the physical properties of the support are excellent, high adhesive strength over a long period of time The present invention relates to a double-sided adhesive tape that maintains
従来より、発泡樹脂製シート状支持体として、アクリル系支持体やＳＢＲ（スチレン−ブタジエンゴム）系支持体が知られている。アクリル系支持体は、アクリル系エマルジョンを機械発泡等により発泡し、次いでこれを離型シート面に塗工した後、乾燥することにより得られるものである（特許文献１、特許請求の範囲）。また、ＳＢＲ系支持体も、同様に、ＳＢＲ系ラテックスを発泡し、塗工及び乾燥することにより得られるものである。 Conventionally, acrylic-based supports and SBR (styrene-butadiene rubber) -based supports are known as foamed resin sheet-shaped supports. The acrylic support is obtained by foaming an acrylic emulsion by mechanical foaming or the like, and then coating the acrylic emulsion on the surface of the release sheet, followed by drying (Patent Document 1, Claims). Similarly, the SBR support is also obtained by foaming, coating and drying SBR latex.
アクリル系支持体を用いた両面粘着テープは、耐候性及び柔軟性に優れている（特許文献１、第２頁左上欄第１１〜１６行目）。しかしながら、この両面粘着テープは、接着強度が低く、また耐熱性にも劣るという欠点があった。この両面粘着テープに高接着強度や耐熱性を付与する方法としては、アクリル系エマルジョン中のアクリル系樹脂として、ガラス転移点Ｔｇの高いものを用いる方法がある。しかし、ガラス転移点Ｔｇの高いアクリル系樹脂は、主として低温下での柔軟性に劣るため、好ましくない。 The double-sided pressure-sensitive adhesive tape using an acrylic support is excellent in weather resistance and flexibility (Patent Document 1, page 2, upper left column, lines 11 to 16). However, this double-sided pressure-sensitive adhesive tape has the disadvantages of low adhesive strength and inferior heat resistance. As a method of imparting high adhesive strength and heat resistance to this double-sided pressure-sensitive adhesive tape, there is a method of using an acrylic resin in an acrylic emulsion having a high glass transition point Tg. However, an acrylic resin having a high glass transition point Tg is not preferable because it is mainly inferior in flexibility at low temperatures.
一方、ＳＢＲ系支持体を用いた両面粘着テープは、高接着強度を持ち、耐熱性及び柔軟性に優れている。しかしながら、この両面粘着テープは、経時的に接着強度が低下してくるという欠点があった。この理由は、ＳＢＲ系支持体は耐候性が悪く、経時的に支持体自体の強度が低下してくるからである。すなわち、支持体の材破による被着物相互間の剥離及び剪断破壊が、経時的に生じやすくなるのである。 On the other hand, a double-sided pressure-sensitive adhesive tape using an SBR support has high adhesive strength and is excellent in heat resistance and flexibility. However, this double-sided pressure-sensitive adhesive tape has a drawback in that the adhesive strength decreases with time. This is because the SBR support has poor weather resistance, and the strength of the support itself decreases with time. That is, peeling and shear failure between adherends due to material breakage of the support tends to occur over time.
本発明は、長期間に亙る高接着強度、高柔軟性、耐熱性及び耐候性を兼ね備えた両面粘着テープを得ることを課題とするものである。そして、両面粘着テープの支持体として、特定の支持体を用いることにより、この課題を達成したものである。 An object of the present invention is to obtain a double-sided pressure-sensitive adhesive tape having high adhesive strength, high flexibility, heat resistance and weather resistance over a long period of time. And the subject was achieved by using a specific support body as a support body of a double-sided adhesive tape.
すなわち、本発明は、発泡樹脂製シート状支持体の両面に感圧接着剤層を積層してなる両面粘着テープであって、前記発泡樹脂製シート状支持体は、アクリル系エマルジョン５〜８０質量部とＳＢＲ系ラテックス９５〜２０質量部（但し、両者の合計は１００質量部である。）との混合物を発泡させて得られたものであることを特徴とする高強度両面粘着テープに関するものである。 That is, the present invention is a double-sided pressure-sensitive adhesive tape in which a pressure-sensitive adhesive layer is laminated on both sides of a foamed resin sheet-like support, and the foamed resin sheet-like support is 5 to 80 masses of an acrylic emulsion. It is related to a high-strength double-sided pressure-sensitive adhesive tape characterized in that it is obtained by foaming a mixture of styrene and 95 to 20 parts by mass of SBR latex (however, the total of both is 100 parts by mass). is there.
本発明で用いる発泡樹脂製シート状支持体は、アクリル系エマルジョン５〜８０質量部とＳＢＲ系ラテックス９５〜２０質量部との混合物を発泡させて得られたものである。特に好ましくは、アクリル系エマルジョン５〜７０質量部とＳＢＲ系ラテックス９５〜３０質量部との混合物を発泡させて得られたものであり、最も好ましくは、アクリル系エマルジョン５〜５０質量部とＳＢＲ系ラテックス９５〜５０質量部との混合物を発泡させて得られたものである。ここで、アクリル系エマルジョンとＳＢＲ系ラテックスとの各質量部は、その合計量が１００質量部となることを前提として定められたものである。アクリル系エマルジョンが５質量部未満になると、得られる支持体の耐候性が低下するため、好ましくない。また、ＳＢＲ系ラテックスが２０質量部未満になると、高接着強度を持つ両面粘着テープが得られないため、好ましくない。 The foamed resin sheet-like support used in the present invention is obtained by foaming a mixture of 5 to 80 parts by mass of an acrylic emulsion and 95 to 20 parts by mass of an SBR latex. Particularly preferably, it is obtained by foaming a mixture of 5 to 70 parts by mass of an acrylic emulsion and 95 to 30 parts by mass of an SBR latex, and most preferably 5 to 50 parts by mass of an acrylic emulsion and an SBR system. It is obtained by foaming a mixture of 95 to 50 parts by mass of latex. Here, each mass part of the acrylic emulsion and the SBR latex is determined on the assumption that the total amount is 100 parts by mass. When the acrylic emulsion is less than 5 parts by mass, the weather resistance of the obtained support is lowered, which is not preferable. On the other hand, when the SBR latex is less than 20 parts by mass, a double-sided pressure-sensitive adhesive tape having high adhesive strength cannot be obtained, which is not preferable.
アクリル系エマルジョンとしては、両面粘着テープの支持体を得る際に使用されている、従来公知の任意のものが用いられる。一般的には、発泡性及び塗工性が良好で、ガラス転移点Ｔｇの低いもの、具体的にはＴｇが−１０℃以下のものを用いるのが好ましい。Ｔｇが−１０℃を超えると、得られる支持体の柔軟性が低下する傾向が生じ、特にＴｇが０℃を超えると、この傾向が顕著となる。ＳＢＲ系ラテックスとしても、両面粘着テープの支持体として使用されている、従来公知の任意のものが用いられる。そしてまた、発泡性及び塗工性の良好なものが用いられる。なお、ＳＢＲ系ラテックス中のＳＢＲ系樹脂のガラス転移点Ｔｇは、一般的に用いられている範囲内であれば、特に差し支えない。 As the acrylic emulsion, any conventionally known one used for obtaining a support for a double-sided pressure-sensitive adhesive tape can be used. In general, it is preferable to use a material having good foamability and coating property and having a low glass transition point Tg, specifically, a Tg of −10 ° C. or lower. When Tg exceeds −10 ° C., the flexibility of the obtained support tends to decrease, and particularly when Tg exceeds 0 ° C., this tendency becomes remarkable. As the SBR latex, any conventionally known one used as a support for a double-sided pressure-sensitive adhesive tape can be used. In addition, those having good foamability and coatability are used. The glass transition point Tg of the SBR resin in the SBR latex is not particularly limited as long as it is within a generally used range.
アクリル系エマルジョンとＳＢＲ系ラテックスとを、混合攪拌して混合物を得る。この際、アクリル系樹脂とＳＢＲ系樹脂の固形分濃度を調整するため、水を添加混合してもよい。この混合物は、機械攪拌等により発泡せしめられる。機械攪拌のための装置としては、従来公知のものを用いればよく、たとえばホイッパー等が用いられる。発泡倍率も、両面粘着テープの支持体として適当な弾力性を持つ程度でよく、具体的には、１．５〜２．５倍程度である。この混合物には、発泡倍率や泡の大きさを調整するため、整泡剤や増粘剤を添加混合することができる。また、得られるシート状支持体の強度を向上させるため、アクリル系樹脂及びＳＢＲ系樹脂相互間を架橋する架橋剤を添加混合してもよい。さらに、必要に応じて、感熱ゲル化剤、着色剤、酸化防止剤、紫外線吸収剤、難燃剤等を添加することもできる。 The acrylic emulsion and the SBR latex are mixed and stirred to obtain a mixture. At this time, water may be added and mixed in order to adjust the solid content concentration of the acrylic resin and the SBR resin. This mixture is foamed by mechanical stirring or the like. As a device for mechanical stirring, a conventionally known device may be used. For example, a whipper or the like is used. The expansion ratio may be an appropriate elasticity as a support for the double-sided pressure-sensitive adhesive tape, and specifically, about 1.5 to 2.5 times. In order to adjust the expansion ratio and the size of the foam, a foam stabilizer and a thickener can be added and mixed with the mixture. Moreover, in order to improve the intensity | strength of the sheet-like support body obtained, you may add and mix the crosslinking agent which bridge | crosslinks between acrylic resin and SBR type resin. Furthermore, if necessary, a heat-sensitive gelling agent, a colorant, an antioxidant, an ultraviolet absorber, a flame retardant and the like can be added.
発泡させた混合物は、離型シート上に塗工される。塗工厚は、得ようとするシート状支持体の厚みに合わせて設定すればよい。具体的には、０．０５〜３ｍｍ程度である。塗工した後、高温下で所定時間乾燥すればよい。これによって、所定の引張強度を持つ発泡樹脂製シート状支持体が得られる。 The foamed mixture is applied onto the release sheet. What is necessary is just to set coating thickness according to the thickness of the sheet-like support body to be obtained. Specifically, it is about 0.05 to 3 mm. After coating, it may be dried at a high temperature for a predetermined time. Thus, a foamed resin sheet-like support having a predetermined tensile strength is obtained.
シート状支持体の両面には、感圧接着剤が塗布されて積層され、感圧接着剤層が形成される。感圧接着剤としては、従来公知の任意のものが採用される。本発明においては、アクリル系感圧接着剤を用いるのが好ましい。これは、シート状支持体との親和性がよく、感圧接着剤層が支持体中に食い込み、より高接着強度を実現しうるからである。そして、感圧接着剤層の各面に、離型紙が積層され両面粘着テープが得られるのである。 A pressure sensitive adhesive is applied and laminated on both sides of the sheet-like support to form a pressure sensitive adhesive layer. Any conventionally known pressure-sensitive adhesive is used. In the present invention, it is preferable to use an acrylic pressure-sensitive adhesive. This is because the affinity with the sheet-like support is good, and the pressure-sensitive adhesive layer bites into the support and can achieve higher adhesive strength. And a release paper is laminated | stacked on each surface of a pressure sensitive adhesive layer, and a double-sided adhesive tape is obtained.
本発明に係る両面粘着テープは、支持体がアクリル系エマルジョンとＳＢＲ系ラテックスとの混合物を発泡させて得られたものであるため、後述の実施例で実証されているとおり、高接着強度、高柔軟性、耐熱性及び耐候性を兼ね備えるという効果を奏する。 Since the double-sided pressure-sensitive adhesive tape according to the present invention is obtained by foaming a mixture of an acrylic emulsion and an SBR latex, the support has high adhesive strength, high There exists an effect that it has flexibility, heat resistance, and weather resistance.
以下、本発明を実施例に基づいて説明するが、本発明は、実施例に限定されるものではない。本発明は、両面粘着テープのシート状支持体として、アクリル系エマルジョンとＳＢＲ系ラテックスとの混合物を発泡させたものを用いれば、両面粘着テープに要求される各種性能を同時に満足するものが得られるとの知見に基づくものとして、解釈されるべきである。 EXAMPLES Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to an Example. In the present invention, if a foamed mixture of an acrylic emulsion and an SBR latex is used as a sheet-like support for a double-sided pressure-sensitive adhesive tape, one that simultaneously satisfies various performances required for a double-sided pressure-sensitive adhesive tape can be obtained. It should be interpreted as based on the knowledge that
実施例１
アクリル系エマルジョン（日本カーバイド工業社製「ＦＸ２１３８Ｙ」、Ｔｇ＝−３２℃）１０質量部と、ＳＢＲ系ラテックス（日本エイアンドエル社製「ＮＳＡ−６５」、Ｔｇ＝−１７℃）９０質量部とを混合し、水で希釈して固形分５０質量％に調整する。得られた混合物１００質量部に架橋剤（日本触媒製「エポクロスＫ−１０１０Ｅ」）１０質量部、整泡剤（サンノプコ社製「ノプコＤＣ１００Ａ」）２質量部、増粘剤（大日本インキ化学工業社製「ボンコートＶ」）１．５質量部を添加混合し、ホイッパーで攪拌発泡し、混合物を１．９倍に発泡した。この発泡物を、離型シート上に０．９ｍｍのクリアランスを有するアプリケーターで塗布した。そして、８０℃のオーブン中で２０分間、乾燥し、発泡樹脂製シート状支持体を得た。
Example 1
10 parts by mass of an acrylic emulsion (“FX2138Y” manufactured by Nippon Carbide Industries Co., Ltd., Tg = −32 ° C.) and 90 parts by mass of an SBR latex (“NSA-65” manufactured by Nippon A & L Co., Ltd., Tg = −17 ° C.) are mixed. And diluted with water to adjust the solid content to 50% by mass. 100 parts by mass of the resulting mixture, 10 parts by mass of a crosslinking agent (“Epocross K-1010E” manufactured by Nippon Shokubai), 2 parts by mass of a foam stabilizer (“Nopco DC100A” manufactured by San Nopco), a thickener (Dainippon Ink and Chemicals) 1.5 parts by mass of “Boncoat V” manufactured by the company was added and mixed, stirred and foamed with a whipper, and the mixture was foamed 1.9 times. This foam was applied on the release sheet with an applicator having a clearance of 0.9 mm. And it dried for 20 minutes in 80 degreeC oven, and obtained the foam-form resin sheet-like support body.
実施例２
アクリル系エマルジョンの量を２５質量部に、ＳＢＲ系ラテックスの量を７５質量部に変更する他は、実施例１と同一の方法で発泡樹脂製シート状支持体を得た。
Example 2
A foamed resin sheet-like support was obtained in the same manner as in Example 1, except that the amount of the acrylic emulsion was changed to 25 parts by mass and the amount of the SBR latex was changed to 75 parts by mass.
実施例３
アクリル系エマルジョンの量を５０質量部に、ＳＢＲ系ラテックスの量を５０質量部に変更する他は、実施例１と同一の方法で発泡樹脂製シート状支持体を得た。
Example 3
A foamed resin sheet-like support was obtained in the same manner as in Example 1 except that the amount of the acrylic emulsion was changed to 50 parts by mass and the amount of the SBR latex was changed to 50 parts by mass.
実施例４
アクリル系エマルジョンの量を７５質量部に、ＳＢＲ系ラテックスの量を２５質量部に変更する他は、実施例１と同一の方法で発泡樹脂製シート状支持体を得た。
Example 4
A foamed resin sheet-like support was obtained in the same manner as in Example 1, except that the amount of the acrylic emulsion was changed to 75 parts by mass and the amount of the SBR latex was changed to 25 parts by mass.
実施例５
ＳＢＲ系ラテックスを、ＪＳＲ社製「ＪＳＲ０５４５」（Ｔｇ＝−３１℃）に変更した他は、実施例１と同一の方法で発泡樹脂製シート状支持体を得た。
Example 5
A foamed resin sheet-like support was obtained in the same manner as in Example 1, except that the SBR latex was changed to “JSR0545” (Tg = −31 ° C.) manufactured by JSR.
実施例６
アクリル系エマルジョンを新中村化学工業社製「ＲＢ５００ＨＮ」（Ｔｇ＝−２０℃）に変更し、架橋剤をコニシ社製「ＣＶＣ硬化剤」に変更し、発泡倍率を２．１倍に変更した他は、実施例１と同一の方法で発泡樹脂製シート状支持体を得た。
Example 6
Acrylic emulsion is changed to “RB500HN” (Tg = −20 ° C.) made by Shin-Nakamura Chemical Co., Ltd., the cross-linking agent is changed to “CVC curing agent” made by Konishi, and the expansion ratio is changed to 2.1 times. Obtained a foamed resin sheet-like support in the same manner as in Example 1.
比較例１
アクリル系エマルジョンの量を１００質量部とし、ＳＢＲ系ラテックスを使用しない他は、実施例１と同一の方法で発泡樹脂製シート状支持体を得た。
Comparative Example 1
A foamed resin sheet-like support was obtained in the same manner as in Example 1 except that the amount of the acrylic emulsion was 100 parts by mass and no SBR latex was used.
比較例２
ＳＢＲ系ラテックスの量を１００質量部とし、アクリル系エマルジョンを使用しない他は、実施例１と同一の方法で発泡樹脂製シート状支持体を得た。
Comparative Example 2
A foamed resin sheet-like support was obtained in the same manner as in Example 1, except that the amount of the SBR latex was 100 parts by mass and no acrylic emulsion was used.
比較例３
アクリル系エマルジョンの量を１００質量部とし、ＳＢＲ系ラテックスを使用しない他は、実施例５と同一の方法で発泡樹脂製シート状支持体を得た。
Comparative Example 3
A foamed resin sheet-like support was obtained in the same manner as in Example 5 except that the amount of the acrylic emulsion was 100 parts by mass and no SBR latex was used.
比較例４
アクリル系エマルジョンの量を１００質量部とし、ＳＢＲ系ラテックスを使用しない他は、実施例６と同一の方法で発泡樹脂製シート状支持体を得た。
Comparative Example 4
A foamed resin sheet-like support was obtained in the same manner as in Example 6 except that the amount of the acrylic emulsion was 100 parts by mass and no SBR latex was used.
比較例５
アクリル系エマルジョンをローム・アンド・ハース・ジャパン社製「Ｅ３５８」（Ｔｇ＝８℃）に変更し、発泡倍率を１．６３倍に変更した他は、比較例４と同一の方法で発泡樹脂製シート状支持体を得た。
Comparative Example 5
The acrylic emulsion was changed to “E358” (Tg = 8 ° C.) manufactured by Rohm and Haas Japan, and the foaming ratio was changed to 1.63 times. A sheet-like support was obtained.
比較例６
アクリル系エマルジョンの量を９０質量部に、ＳＢＲ系ラテックスの量を１０質量部に変更する他は、実施例１と同一の方法で発泡樹脂製シート状支持体を得た。
Comparative Example 6
A foamed resin sheet-like support was obtained in the same manner as in Example 1, except that the amount of the acrylic emulsion was changed to 90 parts by mass and the amount of the SBR latex was changed to 10 parts by mass.
実施例１〜６及び比較例１〜６で得られた発泡樹脂製シート状支持体の物性を、以下の方法で測定した。その結果を表１に示した。 The physical properties of the foamed resin sheet-like supports obtained in Examples 1 to 6 and Comparative Examples 1 to 6 were measured by the following methods. The results are shown in Table 1.
［５０％引張強度（Ｎ／１００ｍｍ2）］
各発泡樹脂製シート状支持体を、ＪＩＳ Ｋ ６２５１の４．１（試験片の形状及び寸法）に規定するダンベル状１号形の打抜型で打ち抜いて、各試験片を作成する。各試験片を、−１０±２℃の雰囲気下に１２時間以上放置した。そして、この各試験片を、引張速度５０ｍｍ／ｍｉｎで引っ張り、試験片が５０％伸長したときの引張強度を測定した。
[50% tensile strength (N / 100mm 2 )]
Each foamed resin sheet-like support is punched out with a dumbbell-shaped No. 1 punching die defined in 4.1 (test strip shape and dimensions) of JIS K 6251 to prepare each test strip. Each test piece was left in an atmosphere of −10 ± 2 ° C. for 12 hours or more. Each test piece was pulled at a tensile speed of 50 mm / min, and the tensile strength when the test piece was extended by 50% was measured.
［破断強度（Ｎ／１００ｍｍ2）］
５０％引張強度の試験と同一の方法で、各試験片を引っ張り、各試験片が破断したときの強度を求め、それを破断強度とした。
[Break strength (N / 100mm 2 )]
Each test piece was pulled by the same method as the 50% tensile strength test, and the strength when each test piece broke was determined.
［引張伸び（％）］
上記破断強度の試験の際に、破断したときの各試験片の伸び率を、次の式で求めた。［（破断時の試験片の長さ−当初の試験片の長さ）／（当初の試験片の長さ）］×１００（％）。
[Tensile elongation (%)]
In the test of the breaking strength, the elongation percentage of each test piece when it broke was obtained by the following formula. [(Length of test piece at break-initial test piece length) / (initial test piece length)] × 100 (%).
［耐候性］
各発泡樹脂製シート状支持体を、６０ｍｍ×１５０ｍｍの大きさに切断し、ＪＩＳ Ｂ ７７５３に規定するサンシャインカーボンアーク灯式耐光性及び耐候性試験機に、各試験片が光照射を受けるように取り付けた。光照射を１００時間行った後、取り出して、各発泡樹脂製シート状支持体の表面状態を目視で確認し、以下の評価基準で評価した。
○：表面にクラックが発生していない。
×：表面にクラックが発生している。
[Weatherability]
Each foamed resin sheet-like support is cut to a size of 60 mm × 150 mm, and each specimen is irradiated with light by a sunshine carbon arc lamp type light resistance and weather resistance tester specified in JIS B 7753. Attached. After performing light irradiation for 100 hours, it was taken out, the surface state of each foamed resin sheet-like support was visually confirmed, and evaluated according to the following evaluation criteria.
○: No cracks occurred on the surface.
X: Cracks are generated on the surface.
［表１］
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
５０％引張強度 破断強度 引張伸び 耐候性
(N/100mm2) (N/100mm2) (％)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
実施例１ １９０ ２７１ １０２ ○
実施例２ １９３ ２７１ １０８ ○
実施例３ ２１７ ３４０ １２０ ○
実施例４ ２４４ ４９８ １７５ ○
実施例５ １３３ ３８１ ２４５ ○
実施例６ ３９６ ４５１ ８５ ○
比較例１ １８７ ２６３ ９３ ×
比較例２ ２１３ ５４２ ２０２ ○
比較例３ １３３ ３８１ ２４５ ×
比較例４ ３０２ ３９５ ９０ ○
比較例５ ７８８ ８３５ ５５ ○
比較例６ ２２１ ５１１ １７８ ○
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
[Table 1]
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
50% tensile strength Breaking strength Tensile elongation Weather resistance
(N / 100mm 2 ) (N / 100mm 2 ) (%)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Example 1 190 271 102 ○
Example 2 193 271 108
Example 3 217 340 120 ○
Example 4 244 498 175 ○
Example 5 133 381 245
Example 6 396 451 85 ○
Comparative Example 1 187 263 93 ×
Comparative Example 2 213 542 202 ○
Comparative Example 3 133 381 245 ×
Comparative Example 4 302 395 90 ○
Comparative Example 5 788 835 55 ○
Comparative Example 6 221 511 178 ○
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
表１の結果から明らかなように、実施例１〜６に係る発泡樹脂製シート状支持体は、５０％引張強度、破断強度、引張伸び及び耐候性共に、良好なものであった。一方、比較例１及び３に係る支持体は、耐候性が悪く、経時的に接着強度が低下することが予測しうる。また、比較例５に係る支持体は、引張伸びが低く、柔軟性に欠けるため、両面粘着テープの支持体としては不適当である。比較例２、４及び６に係る支持体は、実施例１〜６に係る支持体と同様に良好な物性を持つものであるが、後記表２の結果から分かるように、両面粘着テープとしての接着強度に劣るものである。 As is apparent from the results in Table 1, the foamed resin sheet-like supports according to Examples 1 to 6 were good in 50% tensile strength, breaking strength, tensile elongation, and weather resistance. On the other hand, the supports according to Comparative Examples 1 and 3 have poor weather resistance, and it can be predicted that the adhesive strength decreases with time. In addition, the support according to Comparative Example 5 is unsuitable as a support for double-sided pressure-sensitive adhesive tape because it has low tensile elongation and lacks flexibility. The supports according to Comparative Examples 2, 4 and 6 have good physical properties similar to the supports according to Examples 1 to 6, but as can be seen from the results in Table 2 below, It is inferior in adhesive strength.
次に、実施例１〜６及び比較例１〜６で得られた発泡樹脂製シート状支持体を用いて、その両面に、アクリル系粘着剤（コニシ社製「ＫＨ１１０」）を７５±５μｍの厚みで塗布積層し、両面粘着テープを得た。そして、各両面粘着テープの以下の特性について、以下に示す方法で測定した。その結果を表２に示した。 Next, using the foamed resin sheet-like supports obtained in Examples 1 to 6 and Comparative Examples 1 to 6, an acrylic pressure-sensitive adhesive (“KH110” manufactured by Konishi Co., Ltd.) is 75 ± 5 μm on both surfaces. It was coated and laminated with a thickness to obtain a double-sided adhesive tape. And it measured by the method shown below about the following characteristics of each double-sided adhesive tape. The results are shown in Table 2.
［引張剪断強さ（Ｎ／１００ｍｍ2）］
２３±２℃の雰囲気下において、ＳＵＳ３０４板（厚み２ｍｍ）同士を、２５ｍｍ×２５ｍｍの各両面粘着テープで貼り合わせ、５ｋｇロールで圧着する。圧着後、７２時間経過後の引張剪断強さを２３±２℃雰囲気下で測定する。引張速度は５０ｍｍ／ｍｉｎとする。
[Tensile shear strength (N / 100mm 2 )]
In an atmosphere of 23 ± 2 ° C., SUS304 plates (thickness 2 mm) are bonded to each other with a double-sided adhesive tape of 25 mm × 25 mm and pressed with a 5 kg roll. After crimping, the tensile shear strength after 72 hours is measured in an atmosphere of 23 ± 2 ° C. The tensile speed is 50 mm / min.
［９０°剥離強さ（Ｎ／１０ｍｍ）（２３℃・３日後）］
２３±２℃の雰囲気下において、ＳＵＳ３０４板（厚み２ｍｍ）に各両面粘着テープの片面を２５ｍｍ幅で貼り合わせ、５ｋｇロールで圧着する。他面の離型紙を剥がした後、その粘着面に陽極処理された特殊アルミニウム箔（厚み１３０μｍ）を貼り合わせる。７２時間放置した後、２３±２℃の雰囲気下にて９０°剥離強さを測定する。引張速度は３００ｍｍ／ｍｉｎとする。
[90 ° peel strength (N / 10mm) (23 ° C, after 3 days)]
In an atmosphere of 23 ± 2 ° C., one side of each double-sided pressure-sensitive adhesive tape is bonded to a SUS304 plate (thickness 2 mm) with a width of 25 mm and pressed with a 5 kg roll. After releasing the release paper on the other side, an anodized special aluminum foil (thickness 130 μm) is bonded to the adhesive surface. After standing for 72 hours, the 90 ° peel strength is measured in an atmosphere of 23 ± 2 ° C. The tensile speed is 300 mm / min.
［９０°剥離強さ（Ｎ／１０ｍｍ）（０℃・直後）］
０±２℃の雰囲気下に、試験で用いるＳＵＳ３０４板（厚み２ｍｍ）、各両面粘着テープ、特殊アルミニウム箔及び５ｋｇロールを１２時間以上放置する。同温度において、ＳＵＳ３０４板（厚み２ｍｍ）に各両面粘着テープの片面を２５ｍｍ幅で貼り合わせ、５ｋｇロールで圧着する。他面の離型紙を剥がした後、その粘着面に特殊アルミニウム箔（厚み１３０μｍ）を貼り合わせる。その直後に、０±２℃の雰囲気下にて９０°剥離強さを測定する。引張速度は３００ｍｍ／ｍｉｎとする。
[90 ° peel strength (N / 10mm) (0 ° C, immediately after)]
In an atmosphere of 0 ± 2 ° C., the SUS304 plate (thickness 2 mm) used in the test, each double-sided adhesive tape, special aluminum foil, and a 5 kg roll are left for 12 hours or more. At the same temperature, one side of each double-sided adhesive tape is bonded to a SUS304 plate (thickness 2 mm) with a width of 25 mm and pressed with a 5 kg roll. After the release paper on the other side is peeled off, a special aluminum foil (thickness 130 μm) is bonded to the adhesive surface. Immediately thereafter, the 90 ° peel strength is measured in an atmosphere of 0 ± 2 ° C. The tensile speed is 300 mm / min.
［昇温耐熱性（℃）］
一枚のＳＵＳ３０４板（厚み２ｍｍ）の端部中央に孔が開けられているＳＵＳ３０４板（厚み２ｍｍ）一枚と、孔の開いていないＳＵＳ３０４板（厚み２ｍｍ）一枚を準備する。そして、孔の開いていない箇所で、二枚のＳＵＳ３０４板を、２５ｍｍ×２５ｍｍの大記載の各両面粘着テープで貼り合わせ、５ｋｇロールで圧着する。その後、４０分間放置した後、質量１ｋｇ±０．０１ｋｇのおもりを上記孔に掛けて垂下させ、熱風循環式高温装置内で、４０℃から毎分１℃ずつ昇温させた際のおもりの落下温度を測定する。
[Temperature rise heat resistance (℃)]
One SUS304 plate (thickness 2 mm) having a hole in the center of the end of one SUS304 plate (thickness 2 mm) and one SUS304 plate (thickness 2 mm) having no hole are prepared. Then, two SUS304 plates are bonded to each other with a large double-sided adhesive tape of 25 mm × 25 mm and pressed with a 5 kg roll at a location where no hole is formed. Then, after standing for 40 minutes, a weight of 1 kg ± 0.01 kg is suspended in the hole and dropped in the hot air circulation high temperature device when the temperature is raised from 40 ° C. by 1 ° C. per minute. Measure the temperature.
［表２］
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
引張剪断強さ 90°剥離強さ(N/100mm2) 昇温耐熱性
(N/100mm2) ━━━━━━━━━━━━━━━━━ （℃）
23℃・三日後 ０℃・直後
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
実施例１ １３５ ２１．２ ５．７ ２３６
実施例２ １３６ ２０．４ ５．８ ２４０
実施例３ １２３ ２０．５ ５．４ ２３５
実施例４ ６６ ２１．１ ５．４ ２３０
実施例５ １４５ １９．２ ６．０ ２２４
実施例６ １４４ ２０．８ ４．８ ２３７
比較例１ １４６ ２１．３ ４．９ ２３８
比較例２ ４０ １６．８ ４．５ ８８
比較例３ １４０ １９．４ ５．８ ２４５
比較例４ ７６ １３．７ ４．５ １１５
比較例５ １７６ ２２．１ １．４ ２４３
比較例６ ４３ １５．１ ５．１ ９２
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
[Table 2]
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Tensile shear strength 90 ° peel strength (N / 100mm 2 )
(N / 100mm 2 ) ━━━━━━━━━━━━━━━━━ (℃)
23 ℃ ・ 3 days later 0 ℃ ・ immediately ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Example 1 135 21.2 5.7 236
Example 2 136 20.4 5.8 240
Example 3 123 20.5 5.4 235
Example 4 66 21.1 5.4 230
Example 5 145 19.2 6.0 224
Example 6 144 20.8 4.8 237
Comparative Example 1 146 21.3 4.9 238
Comparative Example 2 40 16.8 4.5 88
Comparative Example 3 140 19.4 5.8 245
Comparative Example 4 76 13.7 4.5 115
Comparative Example 5 176 22.1 1.4 243
Comparative Example 6 43 15.1 5.1 92
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
表２の結果から明らかなように、実施例１〜６に係る支持体を用いて得られた両面粘着テープは、引張剪断強さ、９０°剥離強さ及び昇温耐熱性共に良好で、高接着強度を与えるものであることが分かる。なお、実施例４に係る支持体を用いて得られた両面粘着テープは、引張剪断強さが低く、材破によって剪断破壊を生じるものであった。一方、支持体自体の物性は実施例１〜６に係るものと同等であった、比較例２、４及び６に係る支持体を用いて得られた両面粘着テープは、いずれも 引張剪断強さが低く、材破によって剪断破壊を生じるものであった。また、昇温耐熱性も低く、高温下では接着強度が低下することが分かる。したがって、比較例２、４及び６に係る支持体を用いて得られた両面粘着テープは、高接着強度を与えにくいことが分かる。 As is clear from the results in Table 2, the double-sided pressure-sensitive adhesive tapes obtained using the supports according to Examples 1 to 6 have good tensile shear strength, 90 ° peel strength, and elevated temperature resistance, and high It can be seen that it provides adhesive strength. In addition, the double-sided pressure-sensitive adhesive tape obtained using the support according to Example 4 had a low tensile shear strength and caused shear failure due to material breakage. On the other hand, the physical properties of the support itself were equivalent to those according to Examples 1 to 6, and the double-sided pressure-sensitive adhesive tapes obtained using the supports according to Comparative Examples 2, 4 and 6 were all tensile shear strength. The shear fracture was caused by the material breakage. Further, the temperature rise heat resistance is low, and it can be seen that the adhesive strength decreases at high temperatures. Therefore, it turns out that the double-sided pressure-sensitive adhesive tape obtained using the support according to Comparative Examples 2, 4, and 6 hardly gives high adhesive strength.
Claims (4)
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| JP2005087723A JP2006265430A (en) | 2005-03-25 | 2005-03-25 | High-strength double-sided pressure-sensitive adhesive tape |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008087695A (en) * | 2006-10-04 | 2008-04-17 | Hirotani:Kk | Automotive sound insulation/water-proofing type mudguard |
| JP2009120742A (en) * | 2007-11-15 | 2009-06-04 | Sunny:Kk | Method for using self-adhesive sheet and self-adhesive resin used therein |
| KR101318340B1 (en) | 2011-01-14 | 2013-10-23 | (주)건용 | Adhesive Agent Having Water-borne Acrylic Emulsion Property and Production Method Thereof |
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|---|---|---|---|---|
| JPH05311024A (en) * | 1992-04-30 | 1993-11-22 | Japan Synthetic Rubber Co Ltd | Foamable acrylate composition |
| JPH05311128A (en) * | 1992-04-30 | 1993-11-22 | Japan Synthetic Rubber Co Ltd | Emulsion composition for foam |
| JPH0616954A (en) * | 1992-06-29 | 1994-01-25 | Japan Synthetic Rubber Co Ltd | Vinyl polymer emulsion composition for foam |
| JPH0641499A (en) * | 1992-07-22 | 1994-02-15 | Japan Synthetic Rubber Co Ltd | Joint material based on acrylic foam |
| JP2005008871A (en) * | 2003-05-23 | 2005-01-13 | Achilles Corp | Double-sided self-adhesive foam sheet |
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2005
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05311024A (en) * | 1992-04-30 | 1993-11-22 | Japan Synthetic Rubber Co Ltd | Foamable acrylate composition |
| JPH05311128A (en) * | 1992-04-30 | 1993-11-22 | Japan Synthetic Rubber Co Ltd | Emulsion composition for foam |
| JPH0616954A (en) * | 1992-06-29 | 1994-01-25 | Japan Synthetic Rubber Co Ltd | Vinyl polymer emulsion composition for foam |
| JPH0641499A (en) * | 1992-07-22 | 1994-02-15 | Japan Synthetic Rubber Co Ltd | Joint material based on acrylic foam |
| JP2005008871A (en) * | 2003-05-23 | 2005-01-13 | Achilles Corp | Double-sided self-adhesive foam sheet |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008087695A (en) * | 2006-10-04 | 2008-04-17 | Hirotani:Kk | Automotive sound insulation/water-proofing type mudguard |
| JP2009120742A (en) * | 2007-11-15 | 2009-06-04 | Sunny:Kk | Method for using self-adhesive sheet and self-adhesive resin used therein |
| KR101318340B1 (en) | 2011-01-14 | 2013-10-23 | (주)건용 | Adhesive Agent Having Water-borne Acrylic Emulsion Property and Production Method Thereof |
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