JP4837516B2 - Non-stretchable supportless adhesive tape and method for producing the same - Google Patents
Non-stretchable supportless adhesive tape and method for producing the same Download PDFInfo
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Description
本発明は、電子部材などを固定するために使用される接着シート及びその製造方法に関する。 The present invention relates to an adhesive sheet used for fixing an electronic member or the like and a method for manufacturing the same.
一般に、接着テープは、熱可塑性ゴムと熱硬化性樹脂とからなる熱反応性接着剤をシート化したものである。従来、熱接着テープは、粘着剤のようなタック感を有しておらず、加熱圧着することで熱可塑性ゴムと熱硬化性樹脂の反応が起こり、被着体同士を接合するものである。 In general, the adhesive tape is a sheet of a heat-reactive adhesive composed of a thermoplastic rubber and a thermosetting resin. Conventionally, a thermoadhesive tape does not have a tacky feeling like an adhesive, and a reaction between a thermoplastic rubber and a thermosetting resin occurs by thermocompression bonding, and adherends are joined to each other.
近年、接着テープは、近年の電子材料の小型化、軽量化に伴い、接着テープにも薄膜化が要求されるようになり、剥離紙、あるいは、剥離フィルム、直接、接着剤を塗布した支持体無し接着テープの需要が増加している。例えば、特許文献１〜３などには、支持体無し接着テープが記載されている。
しかし、特許文献１〜３などに記載の支持体無し接着テープは、剥離紙あるいは剥離フィルムを剥がしてしまうと、支持体が無いため容易に伸びてしまい、作業性に劣る。特に、この現象は、テープを貼り付ける環境が夏場のように暖かいと顕著になる。故に、接着テープを使用するユーザーは、接着テープを容易に取り扱うことができるように、専用の貼り付け機を導入せざるを得ない状況になっている。
However, the supportless adhesive tapes described in
また、特許文献１などに記載の支持体無し接着テープでは、接着剤に、充填材として、繊維を分散させているが、その目的は、接着テープの伸びを抑制するためではなく、硬化後の接着剤の強度、つまり、接着力を向上させることにあるため、繊維の添加量が多い。
Further, in the adhesive tape without a support described in
また、接着テープの伸びを抑制するには、通常、支持体を使用するのが一般的で、繊維を添加した公知例はない。本願発明の無伸張性支持体無し接着テープは、接着テープの伸びを抑制することを目的として、接着テープ中に、少量の短繊維を添加したものである。 In order to suppress the elongation of the adhesive tape, it is common to use a support, and there is no known example in which fibers are added. The non-stretchable supportless adhesive tape of the present invention is obtained by adding a small amount of short fibers to the adhesive tape for the purpose of suppressing the elongation of the adhesive tape.
本発明の目的は、支持体の無い接着テープ同様の薄さがあり、かつ、作業時にテープが伸びることなく使用することができ、更に、耐溶剤性に優れた無伸張性支持体無し接着テープ及びその製造方法を提供することにある。 It is an object of the present invention to be as thin as an adhesive tape without a support, and can be used without stretching the tape during operation, and further has a non-stretchable supportless adhesive tape excellent in solvent resistance And a manufacturing method thereof.
本発明の目的を達成するために、本発明は特許請求の範囲に記載のような構成とするものである。 In order to achieve the object of the present invention, the present invention is configured as described in the claims.
すなわち、本発明の無伸張性支持体無し接着テープは、アクリロニトリル−ブタジエン−（メタ）アクリル酸共重合体と熱硬化性樹脂から成る組成物を支持体無くフィルム化した接着テープであって、上記組成物１００重量部に対して、上記接着テープ中に短繊維を５〜２５重量部分散させる。 That is, the non-stretchable support-free adhesive tape of the present invention is an adhesive tape in which a composition comprising an acrylonitrile-butadiene- (meth) acrylic acid copolymer and a thermosetting resin is formed into a film without a support, 5 to 25 parts by weight of short fibers are dispersed in the adhesive tape with respect to 100 parts by weight of the composition.
この場合、上記短繊維を、ポリエステル、ナイロンから選ばれた少なくとも１種の材料とする。 In this case, the short fiber is at least one material selected from polyester and nylon.
また、無伸張性支持体無し接着テープを製造する方法において、アクリロニトリル−ブタジエン−（メタ）アクリル酸共重合体と熱硬化性樹脂から成る組成物１００重量部に対して、短繊維を５〜２５重量部分散させた配合物を有機溶剤に溶解させ、剥離処理を施したウェブ上に塗布し、乾燥させることにより、フィルム状接着テープを形成する。 In the method for producing an adhesive tape having no stretchable support, 5 to 25 short fibers are added to 100 parts by weight of a composition comprising an acrylonitrile-butadiene- (meth) acrylic acid copolymer and a thermosetting resin. A film-like adhesive tape is formed by dissolving the compound dispersed in parts by weight in an organic solvent, applying the mixture onto a web that has been subjected to a release treatment, and drying.
この場合、上記短繊維を、ポリエステル、ナイロンから選ばれた少なくとも１種の材料とする。 In this case, the short fiber is at least one material selected from polyester and nylon.
本発明は、アクリロニトリル−ブタジエン−（メタ）アクリル酸共重合体と熱硬化性樹脂から成る組成物を支持体無くフィルム化した接着テープであって、上記組成物１００重量部に対して、接着テープ中に短繊維を５〜２５重量部分散させているため、従来の支持体無し接着テープ同等の薄さを実現することが出来、かつ、作業時には剥離処理したウェブから剥がしても、伸びることが無いため、作業性に優れている。 The present invention is an adhesive tape in which a composition comprising an acrylonitrile-butadiene- (meth) acrylic acid copolymer and a thermosetting resin is formed into a film without a support, and the adhesive tape is used with respect to 100 parts by weight of the composition. Since 5 to 25 parts by weight of short fibers are dispersed therein, it is possible to achieve the same thinness as that of a conventional adhesive tape without a support, and it is possible to stretch even if it is peeled off from the peeled web during work. Since there is no, workability is excellent.
この場合、ポリエステル、ナイロンから選ばれた少なくとも１種の材料を短繊維に使用するため、繊維同士が絡まりあい、より少ない添加量でテープの伸びを抑えることができる。 In this case, since at least one material selected from polyester and nylon is used for the short fibers, the fibers are entangled with each other, and the elongation of the tape can be suppressed with a smaller addition amount.
また、無伸張性支持体無し接着テープを製造する方法において、アクリロニトリル−ブタジエン−（メタ）アクリル酸共重合体と熱硬化性樹脂から成る組成物１００重量部に対して、短繊維を５〜２５重量部分散させた配合物を有機溶剤に溶解させ、剥離処理を施したウェブ上に塗布し、乾燥させることにより、フィルム状接着テープを形成しているため、塗布時に前記短繊維が塗布方向に配列し得るので、より少ない短繊維添加量を実現することができる。 In the method for producing an adhesive tape having no stretchable support, 5 to 25 short fibers are added to 100 parts by weight of a composition comprising an acrylonitrile-butadiene- (meth) acrylic acid copolymer and a thermosetting resin. Since the blended component is dissolved in an organic solvent, applied onto a release-treated web, and dried to form a film-like adhesive tape, the short fibers are applied in the application direction during application. Since they can be arranged, a smaller amount of added short fibers can be realized.
この場合、ポリエステル、ナイロンから選ばれた少なくとも１種の材料を短繊維に使用するため、繊維同士が絡まりあい、より少ない添加量でテープの伸びを抑えることができる。 In this case, since at least one material selected from polyester and nylon is used for the short fibers, the fibers are entangled with each other, and the elongation of the tape can be suppressed with a smaller addition amount.
本発明者らは、材料・プロセスを種々検討した結果、下記の方法により上記課題を解決できることを確認した。 As a result of various studies on materials and processes, the present inventors have confirmed that the above problem can be solved by the following method.
すなわち、本発明の無伸張性支持体無し接着テープは、アクリロニトリル−ブタジエン−（メタ）アクリル酸共重合体と熱硬化性樹脂から成る組成物を支持体無くフィルム化した接着テープであって、上記組成物１００重量部に対して、接着テープ中に短繊維を５〜２５重量部分散させる。 That is, the non-stretchable support-free adhesive tape of the present invention is an adhesive tape in which a composition comprising an acrylonitrile-butadiene- (meth) acrylic acid copolymer and a thermosetting resin is formed into a film without a support, 5 to 25 parts by weight of short fibers are dispersed in the adhesive tape with respect to 100 parts by weight of the composition.
この場合、本発明の無伸張性支持体無し接着テープに使用する短繊維を、ポリエステル、ナイロンから選ばれる少なくとも１種の材料とする。 In this case, the short fiber used for the non-stretchable supportless adhesive tape of the present invention is at least one material selected from polyester and nylon.
更に、本発明の無伸張性支持体無し接着テープの製造方法において、アクリロニトリル−ブタジエン−（メタ）アクリル酸共重合体と熱硬化性樹脂から成る組成物１００重量部に対して、短繊維を５〜２５重量部分散させた配合物を有機溶剤に溶解させ、剥離処理を施したウェブ上に塗布し、乾燥させることにより、フィルム状接着テープを形成する。 Furthermore, in the method for producing an adhesive tape having no stretchable support of the present invention, 5 short fibers are added to 100 parts by weight of a composition comprising an acrylonitrile-butadiene- (meth) acrylic acid copolymer and a thermosetting resin. A film-like adhesive tape is formed by dissolving a compound dispersed in ˜25 parts by weight in an organic solvent, applying the mixture onto a web subjected to a release treatment, and drying.
この場合、本発明の無伸張性支持体無し接着テープに使用する短繊維が、ポリエステル、ナイロンから選ばれる少なくとも１種の材料とする。 In this case, the short fiber used for the non-stretchable supportless adhesive tape of the present invention is at least one material selected from polyester and nylon.
以下、本発明の無伸張性支持体無し接着テープ及びその製造方法について、図を用いて具体的に説明する。 Hereinafter, the non-stretchable support-less adhesive tape of the present invention and the production method thereof will be specifically described with reference to the drawings.
本発明の無伸張性支持体無し接着テープは、図１に示すように、剥離紙あるいは剥離フィルム１ａと、アクリロニトリル−ブタジエン−（メタ）アクリル酸共重合体と熱硬化性樹脂の混合物に短繊維を分散させた接着剤層２とから構成される。また、図２に示すように、接着剤層２の、剥離紙あるいは剥離フィルム１ａに接していない面に、別の剥離紙あるいは剥離フィルム１ｂを貼り合わせても良い。
As shown in FIG. 1, the non-stretchable supportless adhesive tape of the present invention is a short fiber in a release paper or release film 1a, a mixture of an acrylonitrile-butadiene- (meth) acrylic acid copolymer and a thermosetting resin. And an
剥離紙あるいは剥離フィルムは、接着テープ層が容易に剥がすことができる物であれば、特に、限定するものではなく、紙、ラミネート紙、プラスチック製フィルムなどの表面に、シリコーンやアルキルカルバメートなどの剥離剤を塗布したものなどを使用することが出来る。 The release paper or release film is not particularly limited as long as the adhesive tape layer can be easily peeled off, and the release of silicone, alkyl carbamate, etc. on the surface of paper, laminated paper, plastic film, etc. What applied the agent etc. can be used.
熱硬化性樹脂は、加熱により硬化するものであれば、特に、制限するものではなく、エポキシ樹脂、フェノール樹脂などを使用することができる。 The thermosetting resin is not particularly limited as long as it is cured by heating, and an epoxy resin, a phenol resin, or the like can be used.
短繊維は、ポリエステル、ナイロンから選ばれる少なくとも１種の材料である。レーヨンやセルロースなど、有機溶剤を短時間で多量に吸収してしまう材料を用いると、有機溶剤の乾燥に時間を要してしまうため、それら繊維は本用途には適さない。 The short fiber is at least one material selected from polyester and nylon. If a material that absorbs a large amount of organic solvent in a short time such as rayon or cellulose is used, it takes time to dry the organic solvent, so these fibers are not suitable for this application.
また、短繊維の添加量は、アクリロニトリル−ブタジエン−（メタ）アクリル酸共重合体と熱硬化性樹脂から成る組成物１００重量部に対して、５〜２５重量部が好ましい。５重量部未満の場合、接着テープの伸びを抑えることが出来ず、２５重量部を超える添加量の場合、溶剤に溶解した接着剤溶液の粘度が著しく増加してしまうため、塗布性が悪くなり生産性が低下してしまう。 Moreover, the addition amount of the short fiber is preferably 5 to 25 parts by weight with respect to 100 parts by weight of the composition comprising the acrylonitrile-butadiene- (meth) acrylic acid copolymer and the thermosetting resin. When the amount is less than 5 parts by weight, the elongation of the adhesive tape cannot be suppressed, and when the amount exceeds 25 parts by weight, the viscosity of the adhesive solution dissolved in the solvent is remarkably increased, resulting in poor applicability. Productivity is reduced.
接着剤層は、アクリロニトリル−ブタジエン−（メタ）アクリル酸共重合体と熱硬化性樹脂を有機溶剤に溶解し、更に、短繊維を均一に分散させたものを剥離紙あるいは剥離フィルムに均一の厚さになるように塗布し、乾燥させる。一般に、加熱溶融させた接着剤液を塗布する方法が提案されているが、溶融可能な温度まで加熱してしまうと熱硬化成分が硬化してしまうため、本発明の接着テープには適用できない。 The adhesive layer is prepared by dissolving an acrylonitrile-butadiene- (meth) acrylic acid copolymer and a thermosetting resin in an organic solvent and further uniformly dispersing short fibers on a release paper or release film. Apply to dryness and dry. In general, a method of applying an adhesive liquid that has been heated and melted has been proposed. However, since the thermosetting component is cured when heated to a meltable temperature, it cannot be applied to the adhesive tape of the present invention.
有機溶剤は、アクリロニトリル−ブタジエン−（メタ）アクリル酸共重合体と熱硬化性樹脂を均一に溶解できるものであれば、特に、制限されるものではなく、トルエン、キシレン、アセトン、メチルエチルケトン、酢酸エチル、ジメチルホルムアミドなどを使用することができる。 The organic solvent is not particularly limited as long as it can uniformly dissolve the acrylonitrile-butadiene- (meth) acrylic acid copolymer and the thermosetting resin. Toluene, xylene, acetone, methyl ethyl ketone, ethyl acetate , Dimethylformamide and the like can be used.
塗布方法は、接着剤溶液を均一に塗布できるものであれば、特に、制限されるものではなく、コンマコーター、ドクターナイフ、リップコーターなどを使用することができる。 The application method is not particularly limited as long as the adhesive solution can be uniformly applied, and a comma coater, a doctor knife, a lip coater, or the like can be used.
〔実施例１〕
アクリロニトリル−ブタジエン−（メタ）アクリル酸共重合体（日本ゼオン社製 Ｎｉｐｏｌ１０７２Ｊ）７５重量部と熱硬化性樹脂（荒川化学工業製フェノール樹脂 タマノル５３１）２５重量部をジメチルホルムアミド２５０重量部に溶解させ、これにポリエステル短繊維（繊維径５ミクロン、長さ３ｍｍ）５重量部をホモジナイザーにより均一に分散し、接着剤溶液を作製した。作製した接着剤溶液を剥離フィルム上に乾燥厚さ５０ミクロンになるよう塗布し、８０℃のオーブンにて１０分間乾燥させ接着シートを得た。
[Example 1]
75 parts by weight of acrylonitrile-butadiene- (meth) acrylic acid copolymer (Nipol 1072J, manufactured by Nippon Zeon Co., Ltd.) and 25 parts by weight of a thermosetting resin (phenol resin Tamano 531, manufactured by Arakawa Chemical Industries) were dissolved in 250 parts by weight of dimethylformamide. To this, 5 parts by weight of polyester short fibers (fiber diameter 5 microns, length 3 mm) were uniformly dispersed by a homogenizer to prepare an adhesive solution. The prepared adhesive solution was applied onto the release film to a dry thickness of 50 microns and dried in an oven at 80 ° C. for 10 minutes to obtain an adhesive sheet.
〔実施例２〜８〕
表１に示した材料を使用した以外は、実施例１と同様に試料を作製した。
[Examples 2 to 8]
Samples were prepared in the same manner as in Example 1 except that the materials shown in Table 1 were used.
〔比較例１〜６〕
表１に示した材料を使用した以外は、実施例１と同様に試料を作製した。
[Comparative Examples 1-6]
Samples were prepared in the same manner as in Example 1 except that the materials shown in Table 1 were used.
引張強度・伸び：表１に示す材料を塗布、乾燥し、１５０ミクロン厚の接着シートを作製する。これを、引張試験機にて３００ｍｍ／分の速度で引っ張った際の強度と伸びを評価した。
Tensile strength / elongation: The materials shown in Table 1 are applied and dried to produce an adhesive sheet having a thickness of 150 microns. The strength and elongation when this was pulled with a tensile tester at a speed of 300 mm / min were evaluated.
接着力：２枚のステンレス板間に接着シートを挟みこみ、１７０℃の温度で１０秒間、１．５ｋｇｆ／ｃｍ２の圧力下で加熱処理を施した後、十分に空冷し測定用試料を作製した。これを、引張試験機にて１０ｍｍ／分の速度でせん断方向に引っ張り、破断した際の強度を評価した。 Adhesive strength: An adhesive sheet is sandwiched between two stainless steel plates, heat-treated at a temperature of 170 ° C. for 10 seconds under a pressure of 1.5 kgf / cm 2 , and then sufficiently air-cooled to prepare a measurement sample. did. This was pulled in a shearing direction at a speed of 10 mm / min with a tensile tester, and the strength when it was broken was evaluated.
耐溶剤性：作製した接着シートを、離型処理したポリエステルフィルムに挟みこみ、１７０℃の温度で１０秒間、１．５ｋｇｆ／ｃｍ２の圧力下で加熱処理を施した後、十分に空冷し測定用試料を作製した。これを、ジメチルホルムアミド中に浸漬し、５分経過後の形状を目視にて判断する。形状変化の無いものを○、溶解し形状が崩れたものを×とする。 Solvent resistance: The prepared adhesive sheet was sandwiched between release-treated polyester films, heated at 170 ° C. for 10 seconds under a pressure of 1.5 kgf / cm 2 , and then sufficiently cooled by air and measured. A sample was prepared. This is immersed in dimethylformamide, and the shape after 5 minutes is judged visually. The case where there is no change in shape is indicated by ◯, and the case where the shape is broken by melting is indicated by ×.
塗布性：各接着剤溶液を、コンマコータにより塗布した際の塗布性を確認した。平滑なシートが作製出来たものを○、シートにスジが入ったり、繊維の膨潤により塗布出来なかったものを×とする。 Application property: Applicability when each adhesive solution was applied by a comma coater was confirmed. The case where a smooth sheet could be produced was marked with ◯, and the case where the sheet was streaked or could not be applied due to fiber swelling was marked with x.
以上の結果を表２に示す。比較例１は剥離フィルムから剥がした際に伸びてしまい、作業性に劣っていた。比較例２は、テープ表面にスジが入ってしまい、うまく塗布出来なかった。比較例３〜５は、短繊維が溶剤を吸収し膨潤したため、うまく塗布出来なかった。比較例６は、（メタ）アクリル酸が共重合されていないＮＢＲであったため、容易にジメチルホルムアミドに溶解してしまった。 The results are shown in Table 2. Comparative Example 1 was elongated when peeled from the release film, and was inferior in workability. In Comparative Example 2, streaks entered the tape surface and could not be applied well. In Comparative Examples 3 to 5, the short fibers absorbed the solvent and swollen, and thus could not be applied well. Since Comparative Example 6 was NBR in which (meth) acrylic acid was not copolymerized, it was easily dissolved in dimethylformamide.
１ａ：剥離紙あるいは剥離フィルム、１ｂ：別の剥離紙あるいは剥離フィルム
２：接着剤層
1a: Release paper or release film, 1b: Another release paper or release film 2: Adhesive layer
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|---|---|---|---|---|
| JPS53142445A (en) * | 1977-05-17 | 1978-12-12 | Nitto Electric Ind Co Ltd | Bonding method |
| JPH08325532A (en) * | 1995-05-29 | 1996-12-10 | Asahi Corp | Double coated pressure sensitive adhesive sheet |
| JP2000129218A (en) * | 1998-10-26 | 2000-05-09 | Nitto Denko Corp | Sheet-like adhesive composition, electronic component device prepared by using same, and method of repairing the device |
| JP2001311008A (en) * | 2000-04-28 | 2001-11-09 | Three M Innovative Properties Co | Thermal conductive sheet |
-
2006
- 2006-10-12 JP JP2006278535A patent/JP4837516B2/en active Active
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| Publication number | Publication date |
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| JP2008094963A (en) | 2008-04-24 |
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