JPWO2020138008A1 - 通気性粘着シート及び通気性製品 - Google Patents
通気性粘着シート及び通気性製品 Download PDFInfo
- Publication number
- JPWO2020138008A1 JPWO2020138008A1 JP2020563270A JP2020563270A JPWO2020138008A1 JP WO2020138008 A1 JPWO2020138008 A1 JP WO2020138008A1 JP 2020563270 A JP2020563270 A JP 2020563270A JP 2020563270 A JP2020563270 A JP 2020563270A JP WO2020138008 A1 JPWO2020138008 A1 JP WO2020138008A1
- Authority
- JP
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- Prior art keywords
- breathable
- pressure
- sensitive adhesive
- adhesive sheet
- sheet
- 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.)
- Granted
Links
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Abstract
Description
厚さ方向の通気性を有する通気性粘着シートであって、
厚さ方向に延びた第1の貫通孔を有する粘着剤層を備え、
前記粘着剤層の少なくとも一方の面が粘着面を構成し、
前記貫通孔の平均開口径が1.0〜50μmであり、
前記貫通孔の平均間隔が5〜400μmであり、
厚さ方向の通気度のばらつきが、測定有効面積を0.5〜2.0mm2から選ばれる所定の値として日本工業規格(以下、「JIS」と記載する)L1096:2010に定められた通気性測定B法(ガーレー形法)に準拠して測定した空気透過度の変動係数により表示して、22%以下である、通気性粘着シート、
を提供する。
開口を有する表面を有し、前記表面において前記開口を介した通気性を有する通気性製品であって、
前記開口を覆うように前記表面に貼付された通気性粘着シートをさらに備え、
前記通気性粘着シートが、上記本発明の通気性粘着シートである通気性製品、
を提供する。
多孔質基材と、前記多孔質基材の表面に貼付された通気性粘着シートとを備え、
前記通気性粘着シートが、上記本発明の通気性粘着シートである通気性製品、
を提供する。
(実施形態1)
実施形態1の通気性粘着シートを図1A及び図1Bに示す。図1Bには、図1Aの通気性粘着シート1(1A)の断面B−Bを示す。通気性粘着シート1Aは、厚さ方向に延びた第1の貫通孔3を有する粘着剤層2からなる単層の粘着シートである。通気性粘着シート1Aは、貫通孔3により、厚さ方向の通気性を有する。また、通気性粘着シート1Aでは、粘着剤層2の双方の面4A,4Bが粘着面4を構成している。通気性粘着シート1Aは、基材レスの両面粘着シートである。個々の貫通孔3は、通常、互いに独立している。
(2)前駆体層53にレーザー54を照射すると、粘着剤分子等の前駆体層53に含まれる分子の分解による貫通孔3の形成と、レーザー54により与えられた熱による変性領域(典型的には、粘着剤分子の架橋が進行した領域)の形成とが進行する。ここで、変性領域が形成された後に当該領域において変性がさらに進んで貫通孔3が形成されるわけではないことに注意が必要である。寧ろ、一度変性領域が形成されると、当該領域では貫通孔3の均一な形成が難しくなる。また、貫通孔3の形成と変性領域の形成とは競合的であり、このために変性領域の影響は、既に形成したある一つの貫通孔3に隣接する次の貫通孔3の形成だけではなく、レーザー54の照射による最初の一つの貫通孔3の形成にも及ぶ。変性領域が拡大すると、貫通孔3の開口径及び平均間隔の乱れや、通気度及び粘着力のばらつきの増大が生じやすくなる。
レーザー54の照射による変性領域の形成を抑えるために、例えば:
・レーザー54の波長として、前駆体層53に含まれる粘着剤分子が吸収しやすい波長を選択する。これにより、変性領域の形成速度に比べて貫通孔3の形成速度を相対的に向上でき、貫通孔3の形成を優先的に進めることが可能となる。アクリル系粘着剤及びシリコーン系粘着剤に含まれる粘着剤分子は、波長360nm以下の紫外光を比較的よく吸収する。このため、レーザー54として紫外光レーザーを選択することができる。紫外光レーザーは、例えば、UV−YAGレーザー(波長355nm)、DUV−YAGレーザー(波長266nm)、エキシマレーザー(波長248nm)である。
・粘着剤組成物として、レーザー吸収剤を含む組成物を選択する。レーザー吸収剤の含有により、変性領域の形成速度に比べて貫通孔3の形成速度を相対的に向上でき、貫通孔3の形成を優先的に進めることが可能となる。レーザー吸収剤は、例えばUVAである。UVAの種類及び含有量の例は上述のとおりである。
・1つの貫通孔3を形成するためのレーザー54のショット時間をできるだけ短くする。ショット時間が長くなると、変性領域の形成が進行するためである。上述したレーザー54の波長の選択及びレーザー吸収剤により、レーザー54のショット時間の短縮がさらに可能となる。また、短いショット時間において高エネルギーの照射が可能であるナノ秒レーザー、フェムト秒レーザー等をレーザー54の光源として選択することができる。
実施形態2の通気性粘着シートを図4A及び図4Bに示す。図4Bには、図4Aの通気性粘着シート1(1B)の断面B−Bを示す。通気性粘着シート1Bは、厚さ方向に延びた第1の貫通孔3を有する粘着剤層2と、厚さ方向に延びた第2の貫通孔5を有する基材6との積層構造を有する粘着シートである。粘着剤層2は、基材6の片側の面7Aに配置されている。粘着剤層2の貫通孔3と、基材6の貫通孔5とは連通している。通気性粘着シート1Bは、貫通孔3及び貫通孔5により、厚さ方向の通気性を有する。また、通気性粘着シート1Bでは、粘着剤層2の一方の面4Aが粘着面4を構成している。通気性粘着シート1Bは、基材6を備える片面粘着シートである。
実施形態3の通気性粘着シートを図6A及び図6Bに示す。図6Bには、図6Aの通気性粘着シート1(1C)の断面B−Bを示す。通気性粘着シート1Cは、厚さ方向に延びた第1の貫通孔3を有する2つの粘着剤層2(2A,2B)と、厚さ方向に延びた第2の貫通孔5を有する基材6との積層構造を有する粘着シートである。粘着剤層2A,2Bは、基材6の両側の面7A,7Bにそれぞれ配置されている。粘着剤層2Aの貫通孔3と基材6の貫通孔5とは連通している。また、基材6の貫通孔5と粘着剤層2Bの貫通孔3とは連通している。通気性粘着シート1Cは、貫通孔3及び貫通孔5により、厚さ方向の通気性を有する。通気性粘着シート1Cでは、粘着剤層2Aの一方の面4A及び粘着剤層2Bの一方の面4Bが粘着面4を構成している。通気性粘着シート1Cは、基材6を備える両面粘着シートである。
本発明の通気性製品(breathable product)の一例を図8Aに示す。図8Aに示す通気性製品11は、通気口13を有するハウジング14を備える。通気口13は、ハウジング14の表面12に設けられた開口である。通気性製品11は、本発明の通気性粘着シート1をさらに備えている。通気性粘着シート1は、通気口13を覆うように表面12に貼付されて接合されている。通気性製品11では、通気口13及び通気性粘着シート1を介した通気15が可能である。通気性製品11では、表面12及び通気性粘着シート1の面積が小さい場合においても、通気性粘着シート1に基づく、通気性(ventilation ability)をはじめとする良好な特性を得ることができる。なお、図8Aに示す例において、表面12には1つの通気口13が設けられており、通気口13以外の開口は設けられていない。ただし、表面12に設けられた通気口13の数は限定されない。
粘着剤層における貫通孔の平均開口径は、評価対象である粘着剤層の表面(粘着面)に対するSEMによる観察像を画像解析することにより評価した。なお、平均開口径及び開口径のばらつきを評価するにあたり、粘着面に存在する3個の貫通孔の開口をランダムに抽出した。
粘着剤層における貫通孔の平均間隔は、評価対象である粘着剤層の表面(粘着面)に対するSEMによる観察像を画像解析することにより評価した。なお、平均間隔を評価するにあたり、粘着面に存在する6個の貫通孔の開口をランダムに抽出した。
通気性粘着シートの厚さ方向の通気度(ガーレー通気度)は、測定有効面積を2.0mm2として、JIS L1096:2010に定められた通気性測定B法(ガーレー形法)に準拠した上述の方法により評価した。
通気性粘着シートにおける厚さ方向の通気度のばらつきは、測定有効面積を2.0mm2として、JIS L1096:2010に定められた通気性測定B法(ガーレー形法)に準拠して上述の方法により求めたガーレー通気度の標準偏差及び平均値より、ガーレー通気度の変動係数として評価した。なお、ガーレー通気度の標準偏差及び平均値を求めるために、3箇所の測定領域を評価対象である通気性粘着シートに設定した。
通気性粘着シートの粘着面の粘着力(180°引きはがし粘着力)は、JIS Z0237:2009に定められた粘着力の試験方法1に準拠して評価した。
通気性粘着シートにおける粘着面の粘着力のばらつきは、JIS Z0237:2009に定められた粘着力の試験方法1に準拠して求めた180°引きはがし粘着力の標準偏差及び平均値より、180°引きはがし粘着力の変動係数として評価した。なお、180°引きはがし粘着力の標準偏差及び平均値を求めるために、3箇所の測定領域を評価対象である通気性粘着シートの粘着面に設定した。
実施例1では、図3A〜図3Dに示す製造方法により、厚さ方向に延びた貫通孔を有する粘着剤層からなる単層の通気性粘着シートを作製した。
実施例2では、PETシートの表面に形成した前駆体層の厚さを60μmとした以外は実施例1と同様にして、厚さ方向に延びた貫通孔を有する粘着剤層からなる単層の通気性粘着シートを作製した。
比較例1では、粘着剤組成物に対してUVAを加えなかった以外は実施例1と同様にして、厚さ方向に延びた貫通孔を有する粘着剤層からなる単層の通気性粘着シートを作製した。
比較例2では、PETシートの表面に形成した前駆体層の厚さを10μmとするとともに、粘着剤組成物に対してUVAを加えなかった以外は実施例1と同様にして、厚さ方向に延びた貫通孔を有する粘着剤層からなる単層の通気性粘着シートを作製した。
実施例3では、図5A〜図5Cに示す製造方法により、厚さ方向に延びた貫通孔を有する粘着剤層と、厚さ方向に延びた貫通孔を有する基材との積層構造を有し、粘着剤層が基材の片側の面に配置されている通気性粘着シートを作製した。
実施例4では、図7A〜図7Cに示す製造方法により、厚さ方向に延びた貫通孔を有する粘着剤層と、厚さ方向に延びた貫通孔を有する基材との積層構造を有し、粘着剤層が基材の両側の面に配置されている通気性粘着シートを作製した。
実施例5では、貫通孔の平均間隔が40μmとなるようにレーザーを照射した以外は実施例3と同様にして、厚さ方向に延びた貫通孔を有する粘着剤層と、厚さ方向に延びた貫通孔を有する基材との積層構造を有し、粘着剤層が基材の片側の面に配置されている二層構造の通気性粘着シートを作製した。
比較例3では、粘着剤組成物に対してUVAを加えなかった以外は実施例4と同様にして、厚さ方向に延びた貫通孔を有する粘着剤層と、厚さ方向に延びた貫通孔を有する基材との積層構造を有し、粘着剤層が基材の両側の面に配置されている通気性粘着シートの作製を試みた。しかし、レーザーの照射によって前駆体層に貫通孔が形成される前に原フィルムの炭化が進行して、通気性粘着シートを作製することができなかった。
Claims (13)
- 厚さ方向の通気性を有する通気性粘着シートであって、
厚さ方向に延びた第1の貫通孔を有する粘着剤層を備え、
前記粘着剤層の少なくとも一方の面が粘着面を構成し、
前記貫通孔の平均開口径が1.0〜50μmであり、
前記貫通孔の平均間隔が5〜400μmであり、
厚さ方向の通気度のばらつきが、測定有効面積を0.5〜2.0mm2から選ばれる所定の値としてJIS L1096:2010に定められた通気性測定B法(ガーレー形法)に準拠して測定した空気透過度の変動係数により表示して、22%以下である、通気性粘着シート。 - 前記粘着剤層の双方の面が粘着面を構成する基材レスの両面粘着シートである請求項1に記載の通気性粘着シート。
- 厚さ方向に延びた第2の貫通孔を有する基材をさらに備え、
前記粘着剤層は、前記基材の片側の面、又は前記基材の両側の面に配置されており、
前記第1の貫通孔と前記第2の貫通孔とが連通している請求項1に記載の通気性粘着シート。 - 前記基材がポリエチレンテレフタレート又はポリイミドを含む請求項1〜3のいずれかに記載の通気性粘着シート。
- 前記粘着面上に剥離ライナーが配置されている請求項1〜4のいずれかに記載の通気性粘着シート。
- 面積が100mm2以下である請求項1〜5のいずれかに記載の通気性粘着シート。
- 厚さが10〜100μmである請求項1〜6のいずれかに記載の通気性粘着シート。
- 前記粘着剤層が紫外線吸収剤を含む請求項1〜7のいずれかに記載の通気性粘着シート。
- 前記粘着剤層が、アクリル系粘着剤層又はシリコーン系粘着剤層である請求項1〜8のいずれかに記載の通気性粘着シート。
- 前記通気性粘着シートを貼付する貼付面が通気性を有する通気性被着体用である請求項1〜9のいずれかに記載の通気性粘着シート。
- 微小電気機械システム(MEMS)用である請求項1〜10のいずれかに記載の通気性粘着シート。
- 開口を有する表面を有し、前記表面において前記開口を介した通気性を有する通気性製品であって、
前記開口を覆うように前記表面に貼付された通気性粘着シートをさらに備え、
前記通気性粘着シートが、請求項1〜11のいずれかに記載の通気性粘着シートである通気性製品。 - 多孔質基材と、前記多孔質基材の表面に貼付された通気性粘着シートとを備え、
前記通気性粘着シートが、請求項1〜11のいずれかに記載の通気性粘着シートである通気性製品。
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PCT/JP2019/050443 WO2020138008A1 (ja) | 2018-12-28 | 2019-12-23 | 通気性粘着シート及び通気性製品 |
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US (1) | US11912908B2 (ja) |
EP (1) | EP3904086A4 (ja) |
JP (1) | JP7461301B2 (ja) |
KR (1) | KR20210110330A (ja) |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2005121268A1 (ja) * | 2004-06-14 | 2005-12-22 | Lintec Corporation | 粘着シート |
JP2009062486A (ja) * | 2007-09-07 | 2009-03-26 | Lintec Corp | 両面粘着シート |
JP2011021094A (ja) * | 2009-07-15 | 2011-02-03 | Lintec Corp | 粘着シート及びその製造方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
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US3085024A (en) * | 1959-05-19 | 1963-04-09 | Johnson & Johnson | Porous extensible pressure-sensitive adhesive tape in which perforations arearrangedto facilitate tearing |
JP3888679B2 (ja) | 2002-04-23 | 2007-03-07 | 日東電工株式会社 | 両面粘着テープおよび固定方法 |
WO2004061031A1 (ja) * | 2002-12-27 | 2004-07-22 | Lintec Corporation | 粘着シートおよびその製造方法 |
JP4646508B2 (ja) | 2003-10-01 | 2011-03-09 | 日東電工株式会社 | 両面接着テープ又はシートおよびその製造方法 |
JP5213204B2 (ja) * | 2004-03-08 | 2013-06-19 | リンテック株式会社 | 粘着シートおよびその製造方法 |
JP4497453B2 (ja) | 2004-03-16 | 2010-07-07 | 日東電工株式会社 | トナー容器用通気フィルタ、通気部材、それらを用いた現像装置、トナーボックス、およびトナー容器用通気フィルタ集合体 |
US7413787B2 (en) * | 2004-10-20 | 2008-08-19 | Agwest, Llc | Adhesive sheet |
CN101906275A (zh) * | 2010-06-28 | 2010-12-08 | 苏州斯迪克电子胶粘材料有限公司 | 透气性保护膜 |
US9133368B2 (en) * | 2011-08-31 | 2015-09-15 | Lintec Corporation | Adhesive sheet |
JP5941821B2 (ja) * | 2011-10-28 | 2016-06-29 | 日東電工株式会社 | 通気性シート、吸着ユニットへの作業対象物の吸着方法、およびセラミックコンデンサの製造方法 |
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- 2019-12-23 JP JP2020563270A patent/JP7461301B2/ja active Active
- 2019-12-23 CN CN201980086548.3A patent/CN113226752B/zh active Active
- 2019-12-23 EP EP19905967.6A patent/EP3904086A4/en active Pending
- 2019-12-23 KR KR1020217023463A patent/KR20210110330A/ko active IP Right Grant
- 2019-12-23 WO PCT/JP2019/050443 patent/WO2020138008A1/ja unknown
- 2019-12-23 US US17/417,232 patent/US11912908B2/en active Active
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005121268A1 (ja) * | 2004-06-14 | 2005-12-22 | Lintec Corporation | 粘着シート |
JP2009062486A (ja) * | 2007-09-07 | 2009-03-26 | Lintec Corp | 両面粘着シート |
JP2011021094A (ja) * | 2009-07-15 | 2011-02-03 | Lintec Corp | 粘着シート及びその製造方法 |
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CN113226752B (zh) | 2023-04-28 |
WO2020138008A1 (ja) | 2020-07-02 |
KR20210110330A (ko) | 2021-09-07 |
CN113226752A (zh) | 2021-08-06 |
US11912908B2 (en) | 2024-02-27 |
EP3904086A1 (en) | 2021-11-03 |
EP3904086A4 (en) | 2022-09-07 |
TW202031834A (zh) | 2020-09-01 |
JP7461301B2 (ja) | 2024-04-03 |
US20220056310A1 (en) | 2022-02-24 |
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