JP6845974B1 - カバー部材及びこれを備える部材供給アセンブリ - Google Patents
カバー部材及びこれを備える部材供給アセンブリ Download PDFInfo
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- JP6845974B1 JP6845974B1 JP2020568575A JP2020568575A JP6845974B1 JP 6845974 B1 JP6845974 B1 JP 6845974B1 JP 2020568575 A JP2020568575 A JP 2020568575A JP 2020568575 A JP2020568575 A JP 2020568575A JP 6845974 B1 JP6845974 B1 JP 6845974B1
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Abstract
Description
開口を有する面を持つ対象物の当該面に配置されて、前記開口における異物の通過を防ぐカバー部材であって、
前記カバー部材が前記面に配置されたときに前記開口を覆う形状を有する保護膜と、
前記保護膜の一方の主面に接合された第1基材層と、を備え、
前記第1基材層は、2以上の基材フィルムを含む積層構造を有すると共に、前記カバー部材が前記面に配置されたときに前記保護膜と前記面との間に位置し、
前記2以上の基材フィルムは、非発泡フィルムと発泡フィルムとを備えるカバー部材、
を提供する。
部材供給用のシートと、前記シート上に配置されたカバー部材と、を備え、
前記カバー部材は、上記本発明のカバー部材であり、
前記カバー部材の前記第1基材層が前記シートに面している、部材供給アセンブリ、
を提供する。
本発明のカバー部材の一例を図1A及び図1Bに示す。図1Bは、図1Aのカバー部材1(1A)を保護膜2の側から見た平面図である。図1Aには、図1Bの断面A−Aが示されている。カバー部材1Aは、開口52を有する面53を持つ対象物51の面53に配置されて、開口52における異物の通過を防ぐ部材である。図1A及び図1Bには、対象物51の面53に配置された状態にあるカバー部材1Aが示されている。
最初に、測定対象である保護膜2を長方形(長さ100mm×幅20mm)に切り出す。次に、保護膜2と同一の形状を有する両面粘着テープ(日東電工製、No.5610)を2枚準備する。各両面粘着テープは、それぞれ、保護膜2の一方の面及び他方の面に外周を一致させて貼り合わせる。次に、長さ150mm×幅20mmの長方形のPETフィルム(厚さ25μm)を2枚準備する。各PETフィルムは、それぞれ、保護膜2の一方の面及び他方の面に上記両面粘着テープにより貼り合わせる。PETフィルムの貼り合わせは、各PETフィルムの幅方向の両端部が保護膜2の幅方向の両端部と一致し、かつ各PETフィルムの長手方向の両端部が、PETフィルムの主面に垂直に見て、保護膜2及び両面粘着テープと重複しないように実施する。ただし、各PETフィルムの自由端部の長さ(長手方向)として、引張試験機のチャックがPETフィルムを安定してつかめる長さ(例えば25mm)を確保する。次に、PETフィルム/両面粘着テープ/保護膜2/両面粘着テープ/PETフィルムの積層体の厚さ方向に圧着力が加わるように、荷重19.6Nの圧着ローラを1往復させる。その後、引張試験を開始するまでに少なくとも30分放置して、試験片とする。
次に、引張試験機(例えば、島津製作所製、卓上型精密万能試験機オートグラフAGS−X)を準備する。試験片の長手方向の一方の端部における一方のPETフィルムの自由端部を引張試験機の上部チャックに固定する。試験片の長手方向の他方の端部における他方のPETフィルムの自由端部を下部チャックに取り付ける。次に、測定温度25±5℃、測定湿度60±5%RH及び引張速度300mm/分の条件で、他方のPETフィルムの下端部を下向きに引っ張る引張試験を実施して、保護膜2に凝集破壊を発生させる。保護膜2の凝集破壊によるPETフィルムの変位が始まった後、初期の25mmの変位の際に測定されたチャック間の応力は無視し、その後の50mmの変位の際に連続的に記録された応力の測定値の平均値を、保護膜2の凝集力(単位:N/25mm)とする。
カバー部材1は、部材供給用のシートにより供給可能である。当該シートによるカバー部材1の供給態様である部材供給アセンブリの一例を図11に示す。図11の部材供給アセンブリ41は、部材供給用のシート31と、シート31上に配置された1又は2以上のカバー部材1とを備える。各カバー部材1では、第1基材層3がシート31に面している。部材供給アセンブリ41によれば、例えば、対象物の面に配置する工程に対してカバー部材1を効率的に供給できる。
実施例及び比較例の各カバー部材について、部材供給用のシートからの剥離性を以下のように評価した。作製したカバー部材を温度23℃、湿度65%RHの雰囲気に24時間放置して、カバー部材を構成する各層の間の接合及びカバー部材と部材供給用のシートとの間の接合を安定させた。次に、カバー部材の側面(実施例1,2及び比較例1〜3)又はタブフィルムのタブ(実施例3〜7、比較例4,5)をピンセットで把持して持ち上げることにより、部材供給用のシートからカバー部材を剥離した。亀裂等の破損が保護膜に生じず、かつ部材供給用のシートを折り曲げることなくカバー部材を剥離できた場合を優(◎)、亀裂等の破損は保護膜に生じなかったが、カバー部材の剥離には部材供給用のシートの折り曲げ(カバー部材の配置面を外面とする折り曲げ)が必要であった場合を劣(△)、部材供給用のシートを折り曲げたにもかかわらず、剥離時に亀裂等の破損が保護膜に生じた場合を不可(×)とした。
第1基材層、第2基材層及びタブフィルムを備える実施例3〜7及び比較例4,5の各カバー部材について、以下のように、タブフィルムの剥離時における保護膜の破損の有無を評価した。作製したカバー部材を温度23℃、湿度65%RHの雰囲気に24時間放置して、カバー部材を構成する各層の間の接合及びカバー部材と部材供給用のシートとの間の接合を安定させた。次に、タブフィルムのタブをピンセットで把持して持ち上げることにより、部材供給用のシートからカバー部材を剥離した。次に、剥離したカバー部材を、第1基材層を介してポリカーボネート板の表面に貼り付けた。次に、ピンセットでタブを把持して、タブフィルムを第2基材層から剥離した。このとき、保護膜に亀裂等の破損が生じた場合を破損有り(×)、生じなかった場合を破損無し(〇)とした。
第1基材層と部材供給用のシートとの剥離力は、実施例及び比較例の各カバー部材の作製とは別に、JIS Z0237:2009に定められた180°引きはがし粘着力の測定方法に準拠して、以下のように評価した。
(実施例1)
<保護膜の準備>
PTFEファインパウダー(ダイキン工業製、ポリフロンPTFE F−104)100重量部と、成形助剤としてn−ドデカン(ジャパンエナジー製)20重量部とを均一に混合した。得られた混合物をシリンダーを用いて圧縮した後、ラム押出成形して、シート状の混合物を形成した。次に、シート状の混合物を一対の金属ロールを通して厚さ0.2mmに圧延し、更に150℃の加熱により成形助剤を除去して、PTFEシート成形体を形成した。次に、形成したシート成形体を、延伸温度260℃、延伸倍率1.5倍で長手方向に延伸した。次に、延伸温度150℃、延伸倍率6.5倍で幅方向に延伸し、更に360℃で10分焼成して、PTFE延伸多孔質膜である保護膜Aを得た。保護膜Aの凝集力は、2.0N/20mmであった。保護膜Aの凝集力は、上述の方法により評価した。
両面粘着テープA(日東電工製、No.57120B、厚さ100μm)、PETフィルムA(東レ製、ルミラー#25S10、厚さ25μm、非発泡)及び両面粘着テープB(日東電工製、No.5603、厚さ30μm)の積層体(この順に各層が配置)を準備した。両面粘着テープAの基材は、PEの発泡フィルム(厚さ60μm)であった。両面粘着テープBの基材は、PETの非発泡フィルム(厚さ12.5μm)であった。次に、外形11mm×10mm、内形6.8mm×3.8mmの額縁状に積層体を打ち抜き加工して、第1基材層Aを得た。第1基材層Aは、基材フィルムとして、2層の非発泡フィルムと1層の発泡フィルムとを備えていた。両面粘着テープA,Bの粘着剤は、アクリル系であった。
部材供給用のシートとして、PETシート(ニッパ製、PET75x1−JOL、厚さ75μm)を準備した。シートは、長さ160mm及び幅60mmの長方形とした。
保護膜Bと第1基材層Aとを、第1基材層Aの両面粘着テープBにより接合した。接合は、両面粘着テープBとPTFE延伸多孔質膜とが接するように実施した。次に、全体を外径9mm×6mmの長方形に打ち抜き加工して、実施例1のカバー部材を得た。打ち抜き加工は、額縁状である第1基材層Aの内形の中心が当該加工後の全体の中心と一致するように実施した。次に、カバー部材を部材供給用のシートに両面粘着テープAを介して配置した。この状態で、第1基材層Aが備える基材フィルムのうち、両面粘着テープAの基材である発泡フィルムが、保護膜Bから最も離れ、かつ部材供給用のシートに最も近い位置にあった。
保護膜Aに接合する不織布として、PETをコアとし、低融点共重合ポリエステルを鞘とする芯鞘構造を有する複合繊維からなる不織布(厚さ105μm、目付30g/m2)を使用した以外は実施例1と同様にして、カバー部材を得た。実施例2のカバー部材が備える保護膜を保護膜Cとする。カバー部材は、第1基材層Aの両面粘着テープAを介して、部材供給用のシートに配置した。
第1基材層Aの代わりに第1基材層Bを使用した以外は実施例1と同様にして、カバー部材を得た。第1基材層Bには、両面粘着テープC(日東電工製、No.5610、厚さ100μm)を使用した。両面粘着テープCの基材は、PETの非発泡フィルム(厚さ50μm)であった。第1基材層Bは、基材フィルムとして、1層の非発泡フィルムを備えていた。両面粘着テープCの粘着剤は、アクリル系であった。カバー部材は、第1基材層Bの両面粘着テープCを介して、部材供給用のシートに配置した。
第1基材層Aの代わりに第1基材層Cを使用した以外は実施例2と同様にして、カバー部材を得た。第1基材層Cには、両面粘着テープAを使用した。第1基材層Cは、基材フィルムとして、1層の発泡フィルムを備えていた。カバー部材は、第1基材層Cの両面粘着テープAを介して、部材供給用のシートに配置した。
第1基材層Aの代わりに第1基材層Bを使用した以外は実施例2と同様にして、カバー部材を得た。比較例3のカバー部材は、第1基材層Bの両面粘着テープCを介して、部材供給用のシートに配置した。
(実施例3)
<第2基材層の準備>
両面粘着テープC及びPETフィルムB(東レ製、ルミラー#50S10、厚さ50μm、非発泡)の積層体を準備した。次に、積層体を、外形11mm×10mm、内形6.8mm×3.8mmの額縁状に打ち抜き加工して、第2基材層Aを得た。
保護膜Aの一方の面に対して第1基材層Aを、第1基材層Aの両面粘着テープBにより接合した。次に、保護膜Aの他方の面に対して第2基材層Aを、第2基材層Aの両面粘着テープCにより接合した。第2基材層Aの接合は、保護膜Aの主面に垂直に見て、額縁状である第1基材層A及び第2基材層の各々の内形が一致するように実施した。次に、全体を外径9mm×6mmの長方形に打ち抜き加工して、カバー部材を得た。打ち抜き加工は、第1基材層A及び第2基材層Aの内形の中心が当該加工後の全体の中心となるように実施した。次に、カバー部材を部材供給用のシートに第1基材層Aの両面粘着テープAを介して配置した。この状態で、第1基材層Aが備える基材フィルムのうち、両面粘着テープAの基材である発泡フィルムが、保護膜Aから最も離れ、かつ部材供給用のシートに最も近い位置にあった。
第2基材層Aの代わりに第2基材層Bを使用した以外は実施例3と同様にして、カバー部材を得た。第2基材層Bには、両面粘着テープB及びPETフィルムBの積層体を使用した。第2基材層Bは、第2基材層Bの両面粘着テープBにより保護膜Aに接合した。カバー部材は、第1基材層Aの両面粘着テープAを介して、部材供給用のシートに配置した。この状態で、第1基材層Aが備える基材フィルムのうち、両面粘着テープAの基材である発泡フィルムが、保護膜Aから最も離れ、かつ部材供給用のシートに最も近い位置にあった。
第1基材層Aの代わりに第1基材層Dを使用した以外は実施例4と同様にして、カバー部材を得た。第1基材層Dには、両面粘着テープD(日東電工製、No.57115B、厚さ150μm)、PETフィルムA及び両面粘着テープBの積層体(この順に各層が配置)を準備した。両面粘着テープDの基材は、ポリエチレンの発泡フィルム(厚さ80μm)であった。第1基材層Dは、基材フィルムとして、2層の非発泡フィルムと1層の発泡フィルムとを備えていた。両面粘着テープDの粘着剤は、アクリル系であった。第1基材層Dは、第1基材層Dの両面粘着テープBにより保護膜Aに接合した。カバー部材は、第1基材層Dの両面粘着テープDを介して、部材供給用のシートに配置した。この状態で、第1基材層Dが備える基材フィルムのうち、両面粘着テープDの基材である発泡フィルムが、保護膜Aから最も離れ、かつ部材供給用のシートに最も近い位置にあった。
第1基材層Aの代わりに第1基材層Eを使用した以外は実施例4と同様にして、カバー部材を得た。第1基材層Eには、両面粘着テープE(日東電工製、No.57120B、厚さ200μm)、PETフィルムA及び両面粘着テープBの積層体(この順に各層が配置)を準備した。両面粘着テープEの基材は、ポリエチレンの発泡フィルム(厚さ100μm)であった。第1基材層Eは、基材フィルムとして、2層の非発泡フィルムと1層の発泡フィルムとを備えていた。両面粘着テープEの粘着剤は、アクリル系であった。第1基材層Eは、第1基材層Eの両面粘着テープBにより保護膜Aに接合した。カバー部材は、第1基材層Eの両面粘着テープEを介して、部材供給用のシートに配置した。この状態で、第1基材層Eが備える基材フィルムのうち、両面粘着テープEの基材である発泡フィルムが、保護膜Aから最も離れ、かつ部材供給用のシートに最も近い位置にあった。
第1基材層Aの代わりに第1基材層Fを使用した以外は実施例4と同様にして、カバー部材を得た。第1基材層Fには、両面粘着テープA及び両面粘着テープBの積層体を準備した。第1基材層Fは、基材フィルムとして、1層の非発泡フィルムと1層の発泡フィルムとを備えていた。第1基材層Fは、第1基材層Fの両面粘着テープBにより保護膜Aに接合した。カバー部材は、第1基材層Fの両面粘着テープAを介して、部材供給用のシートに配置した。この状態で、第1基材層Fが備える基材フィルムのうち、両面粘着テープAの基材である発泡フィルムが、保護膜Aから最も離れ、かつ部材供給用のシートに最も近い位置にあった。
第1基材層Aの代わりに第1基材層Bを使用した以外は実施例3と同様にして、カバー部材を得た。カバー部材は、第1基材層Bの両面粘着テープCを介して、部材供給用のシートに配置した。
第1基材層Aの代わりに第1基材層Cを使用した以外は実施例3と同様にして、カバー部材を得た。カバー部材は、第1基材層Bの両面粘着テープAを介して、部材供給用のシートに配置した。
Claims (14)
- 開口を有する面を持つ対象物の当該面に配置されて、前記開口における異物の通過を防ぐカバー部材であって、
前記カバー部材が前記面に配置されたときに前記開口を覆う形状を有する保護膜と、
前記保護膜の一方の主面に接合された第1基材層と、を備え、
前記第1基材層は、2以上の基材フィルムを含む積層構造を有すると共に、前記カバー部材が前記面に配置されたときに前記保護膜と前記面との間に位置し、
前記2以上の基材フィルムは、非発泡フィルムと発泡フィルムとを備える、カバー部材。 - 前記発泡フィルムは、前記非発泡フィルムよりも前記保護膜から離れた位置にある、請求項1に記載のカバー部材。
- 前記第1基材層において、前記保護膜から最も離れた位置にある前記基材フィルムが前記発泡フィルムである、請求項1又は2に記載のカバー部材。
- 前記保護膜は、厚さ方向の通気性を有する、請求項1〜3のいずれかに記載のカバー部材。
- 前記保護膜は、ポリテトラフルオロエチレン延伸多孔質膜を含む、請求項1〜3のいずれかに記載のカバー部材。
- 前記保護膜の凝集力が2.0N/20mm以下である、請求項1〜5のいずれかに記載のカバー部材。
- 前記第1基材層は、前記保護膜の主面に垂直に見て、前記保護膜の外周に一致する外周を有する、請求項1〜6のいずれかに記載のカバー部材。
- 前記カバー部材は、1又は2以上の前記基材フィルムを備える第2基材層を更に備え、
前記第2基材層は、前記保護膜の他方の主面に接合されて、前記第1基材層と共に前記保護膜を挟持している、請求項1〜7のいずれかに記載のカバー部材。 - 前記第2基材層は、前記基材フィルムとして非発泡フィルムのみを備える、請求項8に記載のカバー部材。
- 前記第1基材層及び前記第2基材層の各々において前記保護膜に最も近い位置にある前記基材フィルムの構成が同一である、請求項8又は9に記載のカバー部材。
- 前記第2基材層は、前記保護膜の主面に垂直に見て、前記保護膜の外周に一致する外周を有する、請求項8〜10のいずれかに記載のカバー部材。
- 前記カバー部材は、前記カバー部材が前記面に配置されたときに前記面から最も離れた位置にある前記カバー部材の最外層の上に配置されたタブフィルムを更に備え、
前記タブフィルムは、前記最外層の主面に垂直に見て、前記最外層の外周よりも外方に突出した部分を有する請求項1〜11のいずれかに記載のカバー部材。 - 部材供給用のシートと、前記シート上に配置されたカバー部材と、を備え、
前記カバー部材は、請求項1〜12のいずれかに記載のカバー部材であり、
前記カバー部材の前記第1基材層が前記シートに面している、部材供給アセンブリ。 - 前記部材供給アセンブリは帯状であり、巻回されて巻回体を構成している請求項13に記載の部材供給アセンブリ。
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