JP6908475B2 - 接着シート - Google Patents
接着シート Download PDFInfo
- Publication number
- JP6908475B2 JP6908475B2 JP2017174754A JP2017174754A JP6908475B2 JP 6908475 B2 JP6908475 B2 JP 6908475B2 JP 2017174754 A JP2017174754 A JP 2017174754A JP 2017174754 A JP2017174754 A JP 2017174754A JP 6908475 B2 JP6908475 B2 JP 6908475B2
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- adhesive sheet
- adhesive layer
- expandable
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000853 adhesive Substances 0.000 title claims description 229
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- 239000011347 resin Substances 0.000 claims description 34
- -1 imidazole compound Chemical class 0.000 claims description 31
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 27
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- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 6
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- UUQQGGWZVKUCBD-UHFFFAOYSA-N [4-(hydroxymethyl)-2-phenyl-1h-imidazol-5-yl]methanol Chemical compound N1C(CO)=C(CO)N=C1C1=CC=CC=C1 UUQQGGWZVKUCBD-UHFFFAOYSA-N 0.000 description 4
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 description 4
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 4
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- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
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- 229910052919 magnesium silicate Inorganic materials 0.000 description 4
- 235000019792 magnesium silicate Nutrition 0.000 description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 4
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- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical class O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 2
- 229930185605 Bisphenol Natural products 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
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- 239000003963 antioxidant agent Substances 0.000 description 2
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- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
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- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
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- 150000002430 hydrocarbons Chemical class 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
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- 150000002513 isocyanates Chemical class 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
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- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
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- 239000000178 monomer Substances 0.000 description 2
- 125000001624 naphthyl group Chemical group 0.000 description 2
- QWVGKYWNOKOFNN-UHFFFAOYSA-N o-cresol Chemical compound CC1=CC=CC=C1O QWVGKYWNOKOFNN-UHFFFAOYSA-N 0.000 description 2
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- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical class CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- GFNDFCFPJQPVQL-UHFFFAOYSA-N 1,12-diisocyanatododecane Chemical compound O=C=NCCCCCCCCCCCCN=C=O GFNDFCFPJQPVQL-UHFFFAOYSA-N 0.000 description 1
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Description
本発明における基材1は、図1〜6に示すように膨張性接着剤層2を支持する為の部材である。ただし、図7に示すように基材1の無いベースレスタイプの接着シートであっても良い。
本発明における膨張性接着剤層2は、多官能エポキシ樹脂を含むエポキシ樹脂と、硬化剤としてのフェノール樹脂と、硬化触媒としてのイミダゾール系化合物と、感温性発泡剤とを含有する。
一般的な両面接着シートには、通常、接着剤層の癒着を防ぐ目的で剥離紙が設けられている。しかし近年、環境的配慮から、剥離紙を使用しない接着シートが求められている場合もある。また、一般的には、接着剤層は被着体に仮固定できる程度の粘着性を有していることが望まれる場合が多いが、加熱前には接着剤層が非粘着性(タックフリー)であることが有利な場合もある。例えば、熱膨張性接着剤層2が非粘着性であると、接着シートの取り扱い性及び作業性をさらに向上する。具体的には、ステーターコアとコイルを接着する場合、非粘着性の接着剤層を有する接着シートはステーターコアの隙間によりスムーズに挿入することができ、接着シートが挿入されてより狭くなったすき間にコイルをよりスムーズに挿入することができる。このような点から、本発明の接着シートにおいては、少なくとも一つの膨張性接着剤層2の表面に離型剤を塗布することが好ましい。さらに、基材1の両面に膨張性接着剤層2を有している場合には、少なくとも一つの膨張性接着剤層2の表面に離型剤を塗布することが好ましい。
(a)離型剤を構成する成分が低分子量であり、低温(使用前の接着シートの保管時温度)では離型機能が発揮されるが、高温(使用時の接着シートの発泡硬化温度)ではその成分が分解、蒸発又は昇華して離型機能が殆ど失われる。
(b)離型剤の塗布量が少なく、使用時の接着シートにおける膨張性接着剤層2の軟化、溶融、流動及び発泡による掻き混ぜから硬化に至る過程で、離型剤が接着剤層の中に入り込んで離型機能が殆ど失われる。
本発明の接着シートは、以上説明した膨張性接着剤層2を有する接着シートであり、より具体的には、基材1の片面又は両面に膨張性接着剤層2を有する接着シート、あるいは基材1が無いベースレスタイプの接着シートである。接着シートは、基材1及び膨張性接着剤層2以外の層又は部材、例えば離型剤層3や離型フィルム9を有していても良い。
(形状保持率)
アルミL字型枠に膨張性接着剤層が発泡硬化前の接着シートを置き、押付治具を接着シートの上から45度の角度にてコーナーに向かって押し付け、L字型になるように曲げ加工を施し、試験片を取り出し、5秒後試験片の角度を測定し、次式によって計算を行う。
形状保持率(%)=90度÷(折り曲げ加工5秒後の角度)×100(%)
以下の各成分を表1に示す量(質量部)で混合して、基材作製用接着剤(配合1〜5)を得た。
「EP2」:エポキシ樹脂(半固形、エポキシ当量173g/eq、多官能フェノールノボラック型、耐熱性タイプ)
「EP3」:エポキシ樹脂(軟化点70℃、エポキシ当量210g/eq、特殊ノボラック型、耐熱性タイプ)
「EP4」:エポキシ樹脂(軟化点92℃、エポキシ当量200g/eq、特殊多官能型、高耐熱性タイプ)
「EP5」:エポキシ樹脂(軟化点86℃、エポキシ当量230g/eq、ナフタレン環型、耐熱性・靱性タイプ)
「EP6」:エポキシ樹脂(軟化点92℃、エポキシ当量395g/eq、イソシアネート変性型、高Tg・高靱性・強接着タイプ)
「PU」:線状ポリエステルポリウレタン樹脂(軟化点87℃、分子量222300、水酸基含有量0.1%、接着性・柔軟性タイプ)
「H」:熱膨張性マイクロカプセル(平均粒径9μm、膨張開始温度120〜130℃、最大膨張温度145〜155℃)
「T1」:フェノール樹脂(軟化点87℃、水酸基当量178g/eq、ノボラック型、高耐熱性タイプ)
「T2]:イソシアネート系硬化剤(日本ポリウレタン社製、コロネート(登録商標)L)
「T3]:2−フェニル−4,5−ジヒドロキシメチルイミダゾール(四国化成工業社製、商品名2PHZ−PW、融点220℃、活性領域141〜153℃、開始領域153〜168℃)
「J1」:酸化マグネシウム(平均粒径3μm)
「J2」:珪酸マグネシウム(平均粒径5μm)
「J3」:グラスファイバー(平均繊維径6μm、平均繊維長50μm)
「MEK」:メチルエチルケトン
基材用部材として、以下の各部材F1〜F6、Pを用意した。
「F2」:ポリエチレンナフタレート(PEN)フィルム(帝人デュポンフィルム社製、テオネックス(登録商標)Q51、厚さ12μm)
[F3」:ポリフェニレンサルファイド(PPS)フィルム(東レ社製、トレリナ(登録商標)♯50−2030、厚さ50μm)
「F4」:ポリエチレンテレフタレート(PET)フィルム(東レ社製、ルミラー(登録商標)S−10、厚さ50μm)
「F5」:ポリエチレンテレフタレート(PET)フィルム(東レ社製、ルミラー(登録商標)S−10、厚さ38μm)
「F6」:接着剤(配合5)を含浸したアラミドとポリエステルの混抄不織布(この不織布F6は、ウレタン樹脂組成物である接着剤(配合5)をアラミドとポリエステルの混抄不織布(帝人社製、コーネックス(登録商標)、厚さ40μm(20g/m2))に乾燥後の塗布質量が約40g/m2となるように含浸し、その後乾燥して得たものである。)
「P」:芳香族ポリアミドペーパー(デュポン社製、ノーメックス(登録商標)、厚さ60μm)
以下の各成分を表2に示す量(質量部)で混合して、膨張性接着剤(配合2〜3及び6〜8)を得た。なお、配合2〜3の接着剤は、基材作製用接着剤として先に調製した配合2〜3と同一組成のものである。
「EP2」:エポキシ樹脂(半固形、エポキシ当量173g/eq、多官能フェノールノボラック型、耐熱性タイプ)
「EP3」:エポキシ樹脂(軟化点70℃、エポキシ当量210g/eq、特殊ノボラック型、耐熱性タイプ)
「EP4」:エポキシ樹脂(軟化点92℃、エポキシ当量200g/eq、特殊多官能型、高耐熱性タイプ)
「EP5」:エポキシ樹脂(軟化点86℃、エポキシ当量230g/eq、ナフタレン環型、耐熱性・靱性タイプ)
「EP6」:エポキシ樹脂(軟化点92℃、エポキシ当量395g/eq、イソシアネート変性型、高Tg・高靱性・強接着タイプ)
「EP7」:エポキシ樹脂(軟化点92℃、エポキシ当量218g/eq、o−クレゾールノボラック型、接着性タイプ)
「EP8」:エポキシ樹脂(軟化点70℃、エポキシ当量288g/eq、ノボラック型、高靱性タイプ)
「PU」:線状ポリエステルポリウレタン樹脂(軟化点87℃、分子量222300、水酸基含有量0.1%、接着性・柔軟性タイプ)
「H」:熱膨張性マイクロカプセル(平均粒径9μm、膨張開始温度120〜130℃、最大膨張温度145〜155℃)
「T1」:フェノール樹脂(軟化点87℃、水酸基当量178g/eq、ノボラック型、高耐熱性タイプ)
「T2]:イソシアネート系硬化剤(日本ポリウレタン社製、コロネート(登録商標)L)
「T3]:2−フェニル−4,5−ジヒドロキシメチルイミダゾール(四国化成工業社製、商品名2PHZ−PW、融点220℃、活性領域141〜153℃、開始領域153〜168℃)
「J1」:酸化マグネシウム(平均粒径3μm)
「J2」:珪酸マグネシウム(平均粒径5μm)
「J3」:グラスファイバー(平均繊維径6μm、平均繊維長50μm)
「MEK」:メチルエチルケトン
水分散型長鎖アルキル系化合物(中京油脂社製、商品名NC003)10質量部、アセチレンジオール(エアープロダクツ社製)0.4質量部、蒸留水389.6質量部を混合することにより、離型剤Xを得た。
基材K1a〜K10の片面に、膨張性接着剤(配合2〜3及び6〜7)を乾燥後の厚さが約35μm(実施例8では約25μm、実施例9及び10では約30μm)となるように塗布し、その後90℃で5分間乾燥させることにより溶媒を除去し、膨張性接着剤層を形成した。この膨張性接着剤層の表面に、片面シリコーン離型処理した厚さ38μmのポリエステルフィルムを、100℃に加熱した熱ロールでプレスして、第1工程品を得た。この第1工程品の基材のもう一方の面に、同じ種類の膨張性接着剤組成物を、乾燥後の厚さが約35μm(実施例8では約25μm、実施例9及び10では約30μm)となるように塗布し、その後90℃で5分間乾燥させることにより溶媒を除去し、膨張性接着剤層を形成した。この膨張性接着剤層の表面に、片面シリコーン離型処理した厚さ38μmのポリエステルフィルムを、100℃に加熱した熱ロールでプレスして第2工程品を得た。次に、一方のポリエステルフィルムを剥がし、その剥がした面に離型剤Xを約10g/m2塗布し、その後90℃3分間乾燥させて、膨張性接着剤層上に離型剤層を形成した。続いて、もう一方のポリエステルフィルムを剥がしながら巻いて、実施例1〜10、参考例1〜3及び比較例1〜2の接着シートを得た。
片面シリコーン重剥離・離型処理ポリエステルフィルム38μmに、膨張性接着剤(配合8)を乾燥後の厚さが25μmとなるように塗布し、その後90℃5分間乾燥させることにより溶媒を除去し、膨張性接着剤層を形成した。この膨張性接着剤層の表面に、片面シリコーン軽剥離・離型処理ポリエステルフィルム38μmを貼り合せて巻き取ることにより、実施例11の接着シートを得た。この接着シートは、使用の際は両面の離型処理ポリエステルフィルムを剥離し、膨張性接着剤層のみからなるベースレスタイプの接着シートとして使用するものである。
発泡前の接着シートの厚さは、JIS Z 0237「粘着テープ・粘着シート試験方法」に準じて、シックネスゲージによる試験方法により測定した。発泡後の接着シートの厚さは、発泡前の接着シートを50×50mmのサイズに切り出し、熱風乾燥機に縦方向に吊して、170℃、10分の条件で発泡硬化させ、室温で2時間冷却し、その後上記と同じ方法で測定した。
JIS C 2107「電気絶縁用粘着テープ試験方法」に準じて、発泡後の接着シートの引張強さ(N/10mm)を測定した。なお、接着シートの発泡方法は、上記の接着シートの厚さの項目に記載した方法と同じである(以下同様)。
JIS C 2107「電気絶縁用粘着テープ試験方法」に準じて、発泡後の接着シートの伸び(%)を測定した。
JIS C 2107「電気絶縁用粘着テープ試験方法」に準じて、発泡後の接着シートの絶縁破壊電圧(kV)を測定した。
JIS Z 1541「超強力両面粘着テープ」に記載の引張剪断接着力試験方法に準じて、以下に示したような発泡後の接着シートの剪断接着力を測定した。被着体としてはSPCC板(日新製鋼社製、商品名SPCC−SB NCB、1.0mm厚、12×100mm)を用いた。試料貼り付け面積は10×10mm、発泡硬化条件は170℃、10分、引張速度は200mm/分とした。まず図8(A)に示すように、発泡前の接着シート10をSPCC板11に載せ、さらに2つの金属隙間ゲージ12を介して別のSPCC板11を載せ、次いで図8(B)に示すように、接着シート10を発泡硬化させ、この発泡後の接着シート10に対して引張剪断接着力測定(室温(23℃)、200℃加熱)を行った。
京都電子工業社製の迅速熱伝導率計を用いて、薄膜測定モードにて発泡後の接着シートの熱伝導率を測定した。具体的には、アルミ板(厚さ10mm、250×350mm)の上に、熱伝導率が既知である3種類のリファレンスのブロックを載せて、その上に測定用試験片(45×100mm)を載せて、更にその上にヒータ線と熱電対が装備された熱伝導率測定用のセンサプローブ(商品名PD−11、40×97mm、820g)を載せ、測定を開始した。リファレンスのブロックとしては、発泡ポリエチレン(熱伝導率0.0347W/mK)、シリコーンゴム(熱伝導率0.236W/mK)、石英ガラス(熱伝導率1.416)を用いた。
発泡前の接着シートの強さ(こわさ)として、発泡接着シートを曲げる際の抵抗力を測定した。具体的には、JIS P 8125「紙及び板紙−こわさ試験方法−(テーバーこわさ試験方法)」に準じて試験を行い、次式によって曲げモーメントを算出した。
曲げモーメント(gf・cm)=(目盛の読み)×38.0(mm)÷(測定した試験片の幅:mm)
下記形状保持性試験において、折り曲げ加工評価後の試験片を観察して、発泡接着剤層が部分的に耐熱基材から脱落しているかどうかを、目視にて観察した。
図9に示すように、アルミL字型枠(板厚3mm)13に発泡前の試験片(接着シート14)を置き、ピザカッターのような形状の押付治具15を試験片14の上から45度の角度にて、コーナーに向かって押し付け回転させながら、図9(i)に示すように試験片14をL字型になるように折り曲げ加工を施した。折り曲げ加工後に試験片を取り出し、図9(ii)に示すような5秒後の試験片14の形状を分度器で測定した。次式によって計算を行い、以下の基準で形状保持性を評価した。
形状保持率(%)=90度÷(折り曲げ加工5秒後の角度)×100(%)
「◎」:形状保持率が80%以上、100%以下
「○」:形状保持率が65%以上、80%未満
「×」:形状保持率が65%未満
前記の発泡後の接着シートの厚さ測定の試験片において、10点測定を行い、平均の厚さに対する最大又は最小の厚さを、以下の判定基準に従って評価した。
「◎」:平均の厚さに対する最大又は最小の厚さが5%以内である。
発泡硬化前の試料を、25×80mmの大きさで2枚切り出して、膨張接着剤層面の長さ方向の片側端部から15mmの位置まで、炭酸カルシウムの粉体を薄く擦り付けて、無粘着部を形成した(接着面積は25×65mm)。このあと、試料の離型剤層をその面に貼り合わせた試験片を、2枚のステンレス板にはさみ、1kgの荷重をかけて、40℃で336時間放置した後に取り出して、室温で2時間放冷後に試験片を分けるように剥がして、癒着の度合いを次の基準で評価した。
「◎」:接着面は両面とも光沢があり、全く融着していない。
表3に示す結果から明らかなように、実施例1〜10の接着シートは全ての物性が優れていた。具体的には、初期において接着強度及び電気絶縁性に優れていた。また、適度なシート強さと折り曲げた後の形状保持性を有しており、作業性に優れていた。しかも、接着剤層の表面に離型剤を塗布することにより、必ずしも剥離紙を使用する必要のない構成が可能になった。また実施例11の接着シートも、初期において接着強度に優れていた。
2 膨張性接着剤層
3 離型剤層
4 フィルム
5 貼り合わせ用接着剤層
6 不織布
7 紙
8 機能性接着剤層
9 剥離フィルム
10 接着シート
11 SPCC板
12 金属隙間ゲージ
13 アルミL字型枠
14 接着シート
15 押付治具
Claims (17)
- 基材の片面又は両面に膨張性接着剤層を有し、
前記基材が、貼り合わせ用接着剤によって、樹脂フィルムと不織布、又は樹脂フィルムと紙、又は樹脂フィルムと樹脂フィルムを貼り合わせた積層構造を有する積層体からなり、
前記膨張性接着剤層が、多官能エポキシ樹脂を含むエポキシ樹脂と、硬化剤としてのフェノール樹脂と、硬化触媒としてのイミダゾール系化合物と、感温性発泡剤とを含有してなり、
前記膨張性接着剤層の発泡硬化前の接着シートのJIS P 8125に準じた曲げモーメントが40〜600gf・cmである接着シート。 - 感温性発泡剤が熱膨張性マイクロカプセルを含み、該熱膨張性マイクロカプセルの発泡温度がエポキシ樹脂の軟化点以上、且つエポキシ樹脂の硬化反応の活性化温度以下である請求項1記載の接着シート。
- 膨張性接着剤層中のエポキシ樹脂のエポキシ当量数に対する硬化剤としてのフェノール樹脂の水酸基当量数の比率が0.5〜2.0である請求項1記載の接着シート。
- イミダゾール系化合物の含有量が、膨張性接着剤層中の樹脂成分100質量部に対し0.1〜1.0質量部である請求項1記載の接着シート。
- 感温性発泡剤の含有量が、膨張性接着剤層中の樹脂成分100質量部に対し0.5〜20質量部である請求項1記載の接着シート。
- 膨張性接着剤層が、ウレタン樹脂をさらに含む請求項1記載の接着シート。
- 膨張性接着剤層又は貼り合わせ用接着剤が、耐熱性フィラーを含む請求項1記載の接着シート。
- 膨張性接着剤層又は貼り合わせ用接着剤が、繊維状フィラーを含む請求項1記載の接着シート。
- 繊維状フィラーがグラスファイバーであり、該グラスファイバーの平均繊維径が1〜20μm、平均繊維長が10〜200μmである請求項8記載の接着シート。
- 不織布が、アラミド繊維不織布、ガラス繊維不織布、ポリフェニレンスルフィド繊維不織布、耐熱ナイロン繊維不織布及び耐熱ポリエステル繊維不織布からなる群より選ばれる一種以上の不織布である請求項1記載の接着シート。
- 紙が、全芳香族ポリアミドポリマーからなる高耐熱性紙である請求項1記載の接着シート。
- 膨張性接着剤層の発泡硬化後の接着シートのJIS Z 1541に準じた剪断接着力が、室温(23℃)時で200N/cm2以上、200℃加熱時で50N/cm2以上である請求項1記載の接着シート。
- 膨張性接着剤層の発泡硬化後の接着シートのJIS C 2107に準じた絶縁破壊電圧が10kV以上、熱伝導率が0.1W/mK以上である請求項1記載の接着シート。
- 膨張性接着剤層の発泡硬化前の接着シートの以下の方法で測定される形状保持率が70%以上である請求項1記載の接着シート。
(形状保持率)
アルミL字型枠に膨張性接着剤層が発泡硬化前の接着シートを置き、押付治具を接着シートの上から45度の角度にてコーナーに向かって押し付け、L字型になるように曲げ加工を施し、試験片を取り出し、5秒後の試験片の折り曲げ部分の角度を測定し、次式によって計算を行う。
形状保持率(%)=90度÷(折り曲げ加工5秒後の角度)×100(%) - 膨張性接着剤層が発泡硬化する前の接着シートの厚さが250μm以下である請求項1記載の接着シート。
- 被接着部材間の接着及び絶縁の為に、膨張性接着剤層を発泡硬化させて該被接着部材間の隙間を埋める用途に用いられる請求項1記載の接着シート。
- モーターのスロットの接着絶縁用に用いられる請求項16記載の接着シート。
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EP3284793A4 (en) | 2019-02-20 |
EP3922450A1 (en) | 2021-12-15 |
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CN108410376B (zh) | 2022-03-18 |
HUE056688T2 (hu) | 2022-03-28 |
JP2021121671A (ja) | 2021-08-26 |
TW202115215A (zh) | 2021-04-16 |
ES2896801T3 (es) | 2022-02-25 |
JP6220100B2 (ja) | 2017-10-25 |
TWI792081B (zh) | 2023-02-11 |
EP3284793A1 (en) | 2018-02-21 |
TW201641635A (zh) | 2016-12-01 |
JP2018021203A (ja) | 2018-02-08 |
KR101771884B1 (ko) | 2017-08-25 |
CN106414640A (zh) | 2017-02-15 |
EP3284793B1 (en) | 2021-08-04 |
RS62742B1 (sr) | 2022-01-31 |
JPWO2016163514A1 (ja) | 2017-08-10 |
US20180134926A1 (en) | 2018-05-17 |
US11479696B2 (en) | 2022-10-25 |
CN108410376A (zh) | 2018-08-17 |
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