JP2016108533A - 粘着シート - Google Patents
粘着シート Download PDFInfo
- Publication number
- JP2016108533A JP2016108533A JP2015164269A JP2015164269A JP2016108533A JP 2016108533 A JP2016108533 A JP 2016108533A JP 2015164269 A JP2015164269 A JP 2015164269A JP 2015164269 A JP2015164269 A JP 2015164269A JP 2016108533 A JP2016108533 A JP 2016108533A
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- Prior art keywords
- pressure
- sensitive adhesive
- adhesive sheet
- layer
- linearly extending
- Prior art date
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Abstract
Description
粘着剤層を構成する粘弾性体は、上記のような断面形状を有するコート層にフィットしやすい。そのため、例えばコート層の表面パターンや厚さが同じであっても、上記の断面形状を有するコート層を備えるものは、そうでないものと比べて、粘着剤層の表面状態や、粘着剤層とコート層との密着状態に優れたものとなり得る。したがって、上記構成によると、粘着剤層の表面を部分的に覆うコート層を備える粘着シートにおいて、良好な空気抜け性を得つつ、さらなる高品質化が可能となる。また、特に限定的に解釈されるものではないが、本発明の効果は、コート層の新規な断面形状によって得られることから、粘着剤成分やコート層材料は制限されない。このことは、例えば特許文献1において、溝の形状を保持するために粘着剤として比較的硬めの材料が用いられるといったような使用材料の制限を解消する効果をもたらし得る。
ここに開示される粘着シートは、その粘着剤層表面におけるコート層非配置部の面積割合(粘着シートの接着面におけるコート層の面積割合でもあり得る。)が70%以上であることが好ましい。これにより、高い経時接着力を確保することができる。上記面積割合は、より好ましくは75%以上、さらに好ましくは80%以上である。良好な空気抜け性を得る観点からは、上記面積割合は、好ましくは90%以下、より好ましくは85%以下である。
ここに開示されるフィルム状基材としては、例えば、樹脂フィルム、紙、布、ゴムフィルム、発泡体フィルム、金属箔、これらの複合体や積層体等を用いることができる。なかでも、貼り付け性や外観性の観点から、樹脂フィルム層を含むことが好ましい。樹脂フィルム層を含むことは、寸法安定性、厚さ精度、加工性、引張強度等の観点からも有利である。樹脂フィルムの例としては、ポリエチレン(PE)、ポリプロピレン(PP)、エチレン・プロピレン共重合体等のポリオレフィン系樹脂フィルム;ポリエチレンテレフタレート(PET)、ポリブチレンテレフタレート、ポリエチレンナフタレート等のポリエステル系樹脂フィルム;塩化ビニル系樹脂フィルム;酢酸ビニル系樹脂フィルム;ポリイミド系樹脂フィルム;ポリアミド系樹脂フィルム;フッ素系樹脂フィルム;セロハン;等が挙げられる。好適例としては、PE、PP、PETから形成された樹脂フィルムが挙げられる。樹脂フィルムのなかでは、ポリエステルフィルムがより好ましく、そのなかでもPETフィルムがさらに好ましい。フィルム状基材は、単層構造であってもよく、2層または3層以上の多層構造を有してもよい。
ここに開示される粘着剤層は、典型的には、室温付近の温度域において柔らかい固体(粘弾性体)の状態を呈し、圧力により簡単に被着体に接着する性質を有する材料(粘着剤)から構成された層をいう。ここでいう粘着剤は、「C. A. Dahlquist, “Adhesion : Fundamental and Practice”, McLaren & Sons, (1966) P. 143」に定義されているとおり、一般的に、複素引張弾性率E*(1Hz)<107dyne/cm2を満たす性質を有する材料(典型的には、25℃において上記性質を有する材料)である。
CH2=C(R1)COOR2 (1)
ここで、上記式(1)中のR1は水素原子またはメチル基である。また、R2は炭素原子数1〜20の鎖状アルキル基(以下、このような炭素原子数の範囲を「C1−20」と表すことがある。)である。粘着剤の貯蔵弾性率等の観点から、R2がC1−12(例えばC2−10、典型的にはC4−8)の鎖状アルキル基であるアルキル(メタ)アクリレートが好ましい。上記R2がC1−20の鎖状アルキル基であるアルキル(メタ)アクリレートは、1種を単独でまたは2種以上を組み合わせて用いることができる。好ましいアルキル(メタ)アクリレートとして、n−ブチルアクリレートおよび2−エチルヘキシルアクリレートが挙げられる。
架橋反応の促進、製造効率向上等の観点から、粘着剤組成物の乾燥は加熱下で行うことが好ましい。乾燥温度は、例えば40〜150℃程度とすることができ、通常は60〜130℃程度とすることが好ましい。粘着剤組成物を乾燥させた後、さらに、粘着剤層内における成分移行の調整、架橋反応の進行、基材や粘着剤層内に存在し得る歪の緩和等を目的としてエージングを行ってもよい。
粘着剤層表面を部分的に覆うコート層は、空気抜け性を付与し得るものであればよく、その限りにおいて特に制限はない。コート層材料の好適例としては樹脂材料が挙げられる。外観性の観点から、透明または半透明の樹脂材料から形成されたコート層が好ましい。
ここに開示される技術は、上述の粘着シートの接着面を保護する剥離ライナーを備える剥離ライナー付き粘着シートの形態で好ましく実施される。剥離ライナーとしては、慣用の剥離紙等を使用することができ、特に限定されない。例えば、PET等の樹脂フィルムや紙等のライナー基材の表面に剥離処理層を有する剥離ライナーや、フッ素系ポリマー(ポリテトラフルオロエチレン等)やポリオレフィン系樹脂(PE、PP等)の低接着性材料からなる剥離ライナー等を用いることができる。上記剥離処理層は、例えば、シリコーン系、長鎖アルキル系、フッ素系、硫化モリブデン等の剥離処理剤により上記ライナー基材を表面処理して形成されたものであり得る。
(1) フィルム状基材と、該フィルム状基材の少なくとも一方の表面上に設けられた粘着剤層と、を備える粘着シートであって、
前記粘着剤層の表面を部分的に覆うコート層をさらに備え、
前記粘着シートの接着面は、前記粘着剤層と前記コート層とによって構成されており、
前記コート層は、前記接着面の一端から他端に向かって線状に延びる部分を有しており、
前記線状に延びる部分は、前記粘着シートの接着面を構成する第1面と、該第1面に対して該粘着剤層側に位置する第2面と、を有しており、
前記線状に延びる部分の第2面は、該線状に延びる部分の長手方向に直交する断面において、全体としてなだらかな曲線で構成されている、粘着シート。
(2) 前記線状に延びる部分の第2面は、該線状に延びる部分の長手方向に直交する断面において、該線状に延びる部分の一端を起点として中央に向かうにつれて、なだらかな曲線で前記粘着剤層の深さ方向に延びる部分を有する、上記(1)に記載の粘着シート。
(3) 前記線状に延びる部分の第2面は、該線状に延びる部分の長手方向に直交する断面において、該線状に延びる部分の一端から前記粘着剤層の深さ方向に延びる傾斜部と、該線状に延びる部分の最深部を含み且つ前記接着面にほぼ平行する平坦部と、を有する、上記(1)または(2)に記載の粘着シート。
(4) 前記傾斜部は、前記粘着剤層側に凸に湾曲している、上記(3)に記載の粘着シート。
(5) 前記線状に延びる部分は、その厚さTに対する幅Wの比(W/T)が50以上である、上記(1)〜(4)のいずれかに記載の粘着シート。
(6) 前記線状に延びる部分の幅は100μm以上である、上記(1)〜(5)のいずれかに記載の粘着シート。
前記アクリル系ポリマーは、モノマー成分として、式(1):
CH2=C(R1)COOR2 (1)
(上記式(1)中のR1は水素原子またはメチル基である。また、R2は炭素原子数1〜20の鎖状アルキル基である。);で表されるアルキル(メタ)アクリレートを50重量%を超える割合で含む、上記(1)〜(6)のいずれかに記載の粘着シート。
(8) 前記アルキル(メタ)アクリレートは、n−ブチルアクリレートおよび/または2−エチルヘキシルアクリレートである、上記(7)に記載の粘着シート。
(9) 前記アクリル系ポリマーは、副モノマーとしてカルボキシ基含有モノマーおよび/または水酸基含有モノマーが共重合されたアクリル系ポリマーである、上記(7)または(8)のいずれかに記載の粘着シート。
(10) 前記アクリル系ポリマーは、アクリル酸、メタクリル酸、2−ヒドロキシエチルアクリレートおよび4−ヒドロキシブチルアクリレートからなる群から選択される少なくとも1種の副モノマーが共重合されたアクリル系ポリマーである、上記(7)〜(9)のいずれかに記載の粘着シート。
(11) 前記アクリル系ポリマーには、カルボキシ基含有モノマーが共重合されており、前記カルボキシ基含有モノマーの共重合割合は、前記アクリル系ポリマーの合成に使用する全モノマー成分中、0.1〜10重量%である、上記(7)〜(10)のいずれかに記載の粘着シート。
(12) 前記アクリル系ポリマーには水酸基含有モノマーが共重合されており、
前記水酸基含有モノマーの共重合割合は、前記アクリル系ポリマーの合成に使用する全モノマー成分中、0.001〜10重量%である、上記(7)〜(11)のいずれかに記載の粘着シート。
(13) 前記粘着剤層は、イソシアネート系架橋剤および/またはエポキシ系架橋剤を含む、上記(7)〜(12)のいずれかに記載の粘着シート。
(14) 前記粘着剤層は、軟化点が100℃〜140℃である粘着付与樹脂を、前記アクリル系ポリマー100重量部に対して30〜60重量部の割合で含み、
前記粘着付与樹脂は、ロジン系粘着付与樹脂、テルペン系粘着付与樹脂および炭化水素系粘着付与樹脂からなる群から選択される少なくとも1種である、上記(7)〜(13)のいずれかに記載の粘着シート。
(16) 前記コート層は、ポリウレタン系樹脂、フェノール系樹脂、エポキシ系樹脂、ポリアミド系樹脂、尿素メラミン系樹脂、シリコーン系樹脂、ポリシラザン系樹脂、フッ素系樹脂、フェノキシ樹脂、メタクリル系樹脂、アクリル系樹脂、アクリル−ウレタン系樹脂、アクリル−スチレン系樹脂、ポリアリレート樹脂、ポリエステル系樹脂、ポリオレフィン系樹脂、ポリスチレン系樹脂、ポリ塩化ビニル、塩化ビニル−酢酸ビニル共重合体、ポリ酢酸ビニル、ポリ塩化ビニリデン、ポリカーボネート、セルロース類およびポリアセタールからなる群から選択される少なくとも1種の樹脂を含む、上記(1)〜(15)のいずれかに記載の粘着シート。
(17) 前記コート層はポリウレタン系樹脂である、上記(1)〜(16)のいずれかに記載の粘着シート。
(18) 前記コート層は、二液混合硬化型のポリウレタン系樹脂である、上記(1)〜(17)のいずれかに記載の粘着シート。
(19) 前記フィルム状基材は、ポリオレフィン系樹脂フィルム、ポリエステル系樹脂フィルム、塩化ビニル系樹脂フィルム、酢酸ビニル系樹脂フィルム、ポリイミド系樹脂フィルム、ポリアミド系樹脂フィルム、フッ素系樹脂フィルムまたはセロハンフィルムである、上記(1)〜(18)のいずれかに記載の粘着シート。
(20) 前記フィルム状基材はポリエステルフィルムである、上記(1)〜(19)のいずれかに記載の粘着シート。
(21) 前記フィルム状基材はポリエチレンテレフタレートフィルムである、上記(1)〜(20)のいずれかに記載の粘着シート。
(22) 前記フィルム状基材は80%以上の全光線透過率を示す、上記(1)〜(21)のいずれかに記載の粘着シート。
(23) 前記フィルム状基材は発泡体フィルムである、上記(1)〜(18)のいずれかに記載の粘着シート。
(24) 前記発泡体フィルムの平均気泡径は10〜200μmであり、密度は0.01〜0.7g/cm3である、上記(23)に記載の粘着シート。
(25) 前記発泡体フィルムは、アクリル系樹脂発泡体またはポリオレフィン系樹脂発泡体である、上記(23)または(24)に記載の粘着シート。
(27) 携帯電子機器に用いられる、上記(1)〜(26)のいずれかに記載の粘着シート。
(28) 前記粘着剤層の厚さは20μm以下である、上記(1)〜(27)のいずれかに記載の粘着シート。
(29) 前記粘着剤層の厚さTAに対する前記コート層の厚さTCの比(TC/TA)は0.75以下である、上記(1)〜(28)のいずれかに記載の粘着シート。
(30) 前記粘着剤層として、前記フィルム状基材の第1表面上に設けられた第1粘着剤層と、前記フィルム状基材の第2表面上に設けられた第2粘着剤層と、を備え、
前記第1粘着剤層および第2粘着剤層の少なくとも一方の粘着剤層の表面に前記コート層が部分的に配置されている、上記(1)〜(29)のいずれかに記載の粘着シート。
(31) 前記フィルム状基材の厚さは5μm未満である、上記(1)〜(30)のいずれかに記載の粘着シート。
(32) 総厚さが50μm以下である、上記(1)〜(31)のいずれかに記載の粘着シート。
前記粘着剤層表面における前記コート層非配置部の面積割合は70%以上である、上記(1)〜(32)のいずれかに記載の粘着シート。
(34) 前記線状に延びる部分の幅は0.1〜2mmの範囲内である、上記(33)に記載の粘着シート。
(35) 前記粘着剤層表面には、前記線状に延びる部分が複数配置されており、
前記複数の線状に延びる部分のうち一群を構成する複数の線状に延びる部分は、その幅方向にて間隔をおいて配置されており、これによって、前記コート層配置部はストライプ状パターンを有する、上記(33)または(34)に記載の粘着シート。
(36) 前記コート層配置部は、第1ストライプ状パターン部と、該第1ストライプ状パターン部と交差するように配置された第2ストライプ状パターン部とを含み、これによって、前記コート層配置部は格子状パターンを有する、上記(35)に記載の粘着シート。
(37) 前記コート層配置部において、一のストライプ状パターンを構成する複数の線状に延びる部分の間隔は1.0〜10mmの範囲内である、上記(35)または(36)に記載の粘着シート。
(38) 前記コート層が部分的に配置された接着面は、13N/25mm以上の24時間経過後180度剥離強度を示す、上記(33)〜(37)のいずれかに記載の粘着シート。
(40) 前記剥離ライナーの表面のうち前記接着面側の表面は、平滑に形成されている、上記(39)に記載の剥離ライナー付き粘着シート。
(41) 少なくとも一方の表面が剥離性表面である剥離性支持体を備える粘着シート用剥離ライナーであって、
前記剥離性支持体の剥離性表面上には、ここに開示されるいずれかのコート層であって粘着シートに転写可能なコート層が設けられている、剥離ライナー。
(42) 前記コート層は、前記剥離性表面の一端から他端に向かって線状に延びる部分を有しており、
前記線状に延びる部分は、前記剥離性表面側に位置する第1面と、該剥離性表面上において外表面を構成する第2面と、を有しており、
前記線状に延びる部分の第2面は、該線状に延びる部分の長手方向に直交する断面において、全体としてなだらかな曲線で構成されている、上記(41)に記載の剥離ライナー。
(43) 前記コート層の厚さは3μm未満である、上記(41)または(42)に記載の剥離ライナー。
(44) 剥離性支持体の剥離性表面上に粘着剤層を形成する工程と、フィルム状基材の表面に前記粘着剤層を転写する工程と、を含む、上記(1)〜(38)のいずれかに記載の粘着シートを製造する方法であって、
前記剥離性支持体の剥離性表面上にはコート層が部分的に形成されており、前記粘着剤層を形成する工程は、前記コート層が形成された前記剥離性表面上に粘着剤層をさらに形成する工程であるか;あるいは
前記剥離性支持体の剥離性表面上にはコート層が形成されておらず、前記粘着剤層を転写する工程の後、前記剥離性支持体を前記粘着剤層から除去し、
剥離性表面上にコート層が部分的に形成されたコート層形成剥離性支持体を用意し、前記コート層形成剥離性支持体を、該コート層が前記粘着剤層の表面に転写されるように該粘着剤層に重ねる;ことを特徴とする、製造方法。
(45) 剥離性支持体の剥離性表面上にコート層を部分的に形成する工程と;
前記コート層が形成された前記剥離性表面上に粘着剤層をさらに形成する工程と;
フィルム状基材の表面に前記粘着剤層を転写する工程と;
を含む、上記(1)〜(38)のいずれかに記載の粘着シートを製造する方法。
(粘着剤組成物の調製)
攪拌機、温度計、窒素ガス導入管、還流冷却器、滴下ロートを備えた反応容器に、n−ブチルアクリレート70部と、2−エチルヘキシルアクリレート30部と、アクリル酸3部と、4−ヒドロキシブチルアクリレート0.05部と、重合開始剤としてアゾビスイソブチロニトリル0.08部と、重合溶媒としてのトルエンとを仕込み、60℃で6時間溶液重合してアクリル系ポリマーのトルエン溶液(粘度28Pa・s、固形分40%)を得た。得られたアクリル系ポリマーのMwは約44万であった。
上記トルエン溶液に含まれるアクリル系ポリマー100部に対し、粘着付与樹脂としての重合ロジンペンタエリスリトールエステル(荒川化学工業社製、商品名「ペンセルD−125」、軟化点125℃)30部を加えた後、イソシアネート系架橋剤(日本ポリウレタン工業社製、商品名「コロネートL」)3部を添加、混合して、アクリル系粘着剤組成物を調製した。
厚さ75μmの剥離フィルム(フジコー社製、商品名「FMN−75WD(C1−CA1)」)の剥離性表面にコート層形成材料(ウレタン系:2液混合硬化型インク)をグラビア印刷により付与し、格子状パターンを有するコート層(塗布厚約1.5μm、透明)を形成した。このようにして、コート層が剥離性表面に部分的に形成されたコート層形成剥離フィルムを得た。
上記で得たコート層形成剥離フィルムのコート層形成剥離性表面に、上記粘着剤組成物を最終的な厚さが13μmとなるように塗布、乾燥し、剥離フィルムに支持された形態の粘着剤層を得た。そして、厚さ4μmのPETフィルム基材(商品名「ルミラー」、東レ社製)を用意し、このPET基材の第1面(コロナ放電処理面)に、上記で得た粘着剤層を剥離フィルムに支持された状態で転写した。剥離フィルムは、そのまま粘着剤層表面の保護に用いた。
また、厚さ38μmの剥離フィルム(商品名「ダイヤホイルMRF38」、三菱樹脂社製)の剥離処理面に、上記粘着剤組成物を最終的な厚さが13μmとなるように塗布し、100℃で3分間乾燥させ、剥離フィルムに支持された形態の粘着剤層を得た。そして、上記PET基材の第2面(コロナ放電処理面)に、上記で得た粘着剤層を剥離フィルムに支持された状態で転写した。剥離フィルムは、そのまま粘着剤層表面の保護に用いた。
上記の方法で各粘着剤層をPET基材の両面に転写することにより、PET基材の第1面にコート層形成粘着剤層が配置され、他方の面にコート層非形成粘着剤層が配置された基材付き両面粘着シートを作製した。この粘着シートの一方の接着面は、図1に示すコート層からなる格子状パターンが形成されたコート層形成接着面であり、コート層の帯状部分の幅(線幅)は約200μm、帯状部分のピッチは約2mmであり、粘着シートの接着面におけるコート層の面積割合は19%であった。得られた粘着シートのSEM断面画像を図9〜12に示す。この断面画像は、コート層の線状に延びる部分の長手方向に直交する断面における撮影画像であり、図中のコート層は、格子状パターンの帯状部分の一つを示している。上記粘着シートの他方の接着面は、コート層非形成接着面である。
実施例に係る両面粘着シートの一方の接着面(コート層非形成接着面)を露出させ、厚さ25μmのPETフィルムで裏打ちし、50mm×50mmの正方形状にカットして測定サンプルを作製した。この測定サンプルのコート層形成接着面を露出させ、水平に載置された被着体としてのステンレス鋼板(SUS板)の上に、上記コート層形成接着面が被着体側となるように測定サンプルを乗せた(圧着はしない)。
次に、気泡形成用ゴム板を用意し、これを上記測定サンプルの上に重ねて、プレスすることにより、測定サンプルの接着面(コート層形成接着面)と被着体表面との間に気泡を形成した。具体的には、気泡形成用ゴム板として、50mm×50mmの正方形状を有し、その面中央に20mm×20mmの正方形状の開口(貫通孔)を有するゴム板を用意した。この気泡形成用ゴム板を上記測定サンプルの上面(裏打ち面)に重ねて、その上から3kgf、5秒間の条件でプレスし、当該ゴム板の枠形状に対応する部分における測定サンプルの接着面(コート層形成接着面)と被着体表面とを圧着させ、ゴム板の開口に対応する非荷重領域(20mm×20mmの正方形状領域)における測定サンプルの接着面(コート層形成接着面)と被着体表面との間に気泡を形成した。
そして、上記測定サンプルの裏打ち面上の気泡形成用ゴム板を取り除いて、50mm×50mmの正方形状のゴム板(開口なし)を上記測定サンプルの裏打ち面上に重ねて、その上から、3kgf、15秒間の条件でプレスした。ゴム板を取り除き、予め形成した気泡の抜け具合を目視で確認した。なお、ゴム板としては、入間川ゴム社製の商品名「NEO−200」(厚さ3mm)を使用し、気泡形成用ゴム板としては、同種のゴム板を加工したものを用いた。
目視観察の結果、粘着シートの接着面(コート層形成接着面)に気泡の残存は認められず、実施例に係る粘着シートは良好な空気抜け性を有することが確認された。
実施例に係る両面粘着シートの一方の接着面(コート層非形成接着面)を露出させ、厚さ50μmのPETフィルムで裏打ちし、20mm×100mmのサイズにカットして測定サンプルを作製した。この測定サンプルのコート層形成接着面を露出させ、23℃、50%RHの環境下にて、上記測定サンプルの露出接着面をステンレス鋼板(SUS板)の表面に5kgのローラを1往復させて圧着した。同環境に24時間放置した後、万能引張圧縮試験機を使用して、JIS Z 0237:2000に準じて、引張速度300mm/分、剥離角度180度の条件で、剥離強度(N/20mm)を測定した(24時間経過後接着力)。
また、コート層を形成しなかった他は実施例と同様にして作製した粘着シート(コート層非形成粘着シート)についても、上記と同様にして、被着体に貼り合わせてから24時間後の剥離強度PC(N/20mm)を測定した。
そして、上記コート層非形成粘着シート(接着面における粘着剤層の面積割合100%、コート層の面積割合0%)の剥離強度PCを100%として、実施例に係る粘着シートの接着面におけるコート層の面積割合を差し引き、実施例に係る粘着シートの理論剥離強度PT(N/20mm)を求めた。実施例では、粘着シートの接着面(コート層形成接着面)におけるコート層の面積割合が19%であったので、100−19=81%から、PT=PC×0.81となる。この理論剥離強度PTに対して実測値PM(実施例に係る粘着シートの上記条件で測定された剥離強度)が90%以上であれば(PM≧PT×0.9)、粘着剤層表面に形成されたコート層が粘着剤層によく馴染み、粘着シートの接着面(コート層形成接着面)の表面状態が良く、理論値に近い値を実現したものと評価することができる。
実施例に係る粘着シートにつき、上記の評価を行った結果、上記剥離強度の実測値PMは、理論剥離強度PTに対して90%以上であった。
実施例に係る粘着シートを用意し、ダイヤルゲージを用いて、コート層の格子の交点10点と、格子状パターンのコート層に囲まれた矩形状の粘着剤層露出部分の中心10点につき、厚さを測定し、そのなかの最大値TM(μm)と標準厚さTS(μm)とを、式:(TM−TS)/TS×100;に代入し、得られた値を厚み公差(%)として用いた。実施例に係る粘着シートの厚み公差は50%以下であり、合格レベルと評価できる。
上記の結果から、コート層の断面形状を特定の形状とすることにより、良好な空気抜け性が得られ、かつ、さらなる高品質化が実現されることがわかる。
1A 接着面
10 フィルム状基材
20,21,22 粘着剤層
20A 粘着剤層表面
30 コート層
40 コート層パターン(格子状パターン)
42 第1ストライプ状パターン部
44 第2ストライプ状パターン部
50 線状に延びる部分(帯状部分)
52 第1面
54 第2面
56 線状に延びる部分の幅方向の一端(左端)
58 線状に延びる部分の幅方向の他端(右端)
60 傾斜部
62 平坦部
70 コート層配置部
72 コート層非配置部
100,101,102 剥離ライナー
110 コート層付き剥離ライナー
120 剥離性支持体
120A 剥離性表面
Claims (8)
- フィルム状基材と、該フィルム状基材の少なくとも一方の表面上に設けられた粘着剤層と、を備える粘着シートであって、
前記粘着剤層の表面を部分的に覆うコート層をさらに備え、
前記粘着シートの接着面は、前記粘着剤層と前記コート層とによって構成されており、
前記コート層は、前記接着面の一端から他端に向かって線状に延びる部分を有しており、
前記線状に延びる部分は、前記粘着シートの接着面を構成する第1面と、該第1面に対して該粘着剤層側に位置する第2面と、を有しており、
前記線状に延びる部分の第2面は、該線状に延びる部分の長手方向に直交する断面において、全体としてなだらかな曲線で構成されている、粘着シート。 - 前記線状に延びる部分の第2面は、該線状に延びる部分の長手方向に直交する断面において、該線状に延びる部分の一端を起点として中央に向かうにつれて、なだらかな曲線で前記粘着剤層の深さ方向に延びる部分を有する、請求項1に記載の粘着シート。
- 前記線状に延びる部分の第2面は、該線状に延びる部分の長手方向に直交する断面において、該線状に延びる部分の一端から前記粘着剤層の深さ方向に延びる傾斜部と、該線状に延びる部分の最深部を含み且つ前記接着面にほぼ平行する平坦部と、を有する、請求項1または2に記載の粘着シート。
- 前記傾斜部は、前記粘着剤層側に凸に湾曲している、請求項3に記載の粘着シート。
- 前記線状に延びる部分は、その厚さTに対する幅Wの比(W/T)が50以上である、請求項1〜4のいずれか一項に記載の粘着シート。
- 前記線状に延びる部分の幅は100μm以上である、請求項1〜5のいずれか一項に記載の粘着シート。
- 請求項1〜6のいずれか一項に記載の粘着シートと、該粘着シートの接着面を保護する剥離ライナーと、を備える、剥離ライナー付き粘着シート。
- 少なくとも一方の表面が剥離性表面である剥離性支持体を備える粘着シート用剥離ライナーであって、
前記剥離性支持体の剥離性表面上には、粘着シートに転写可能なコート層が設けられており、
前記コート層は、前記剥離性表面の一端から他端に向かって線状に延びる部分を有しており、
前記線状に延びる部分は、前記剥離性表面側に位置する第1面と、該剥離性表面上において外表面を構成する第2面と、を有しており、
前記線状に延びる部分の第2面は、該線状に延びる部分の長手方向に直交する断面において、全体としてなだらかな曲線で構成されている、剥離ライナー。
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KR20190065262A (ko) * | 2016-10-05 | 2019-06-11 | 도오꾜오까고오교 가부시끼가이샤 | 레지스트 조성물 및 레지스트 패턴 형성 방법, 고분자 화합물, 그리고 공중합체 |
KR102439897B1 (ko) | 2016-10-05 | 2022-09-02 | 도오꾜오까고오교 가부시끼가이샤 | 레지스트 조성물 및 레지스트 패턴 형성 방법, 고분자 화합물, 그리고 공중합체 |
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JP7437685B2 (ja) | 2020-04-15 | 2024-02-26 | 住江織物株式会社 | 車両用床表示フィルム |
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TW201625757A (zh) | 2016-07-16 |
CN107001870A (zh) | 2017-08-01 |
KR102506412B1 (ko) | 2023-03-07 |
US20170267897A1 (en) | 2017-09-21 |
CN107001870B (zh) | 2021-07-06 |
CN107001871A (zh) | 2017-08-01 |
US10596792B2 (en) | 2020-03-24 |
CN107001869B (zh) | 2021-07-23 |
JP6664167B2 (ja) | 2020-03-13 |
CN113637419A (zh) | 2021-11-12 |
CN107001869A (zh) | 2017-08-01 |
JP2016108534A (ja) | 2016-06-20 |
KR102506413B1 (ko) | 2023-03-07 |
CN107001871B (zh) | 2020-11-10 |
US20170335142A1 (en) | 2017-11-23 |
KR102463777B1 (ko) | 2022-11-07 |
KR20170088833A (ko) | 2017-08-02 |
KR20170090411A (ko) | 2017-08-07 |
JP2016108532A (ja) | 2016-06-20 |
TWI714541B (zh) | 2021-01-01 |
TW201625758A (zh) | 2016-07-16 |
JP6664166B2 (ja) | 2020-03-13 |
JP6679239B2 (ja) | 2020-04-15 |
TW201632597A (zh) | 2016-09-16 |
KR20170092541A (ko) | 2017-08-11 |
TWI682984B (zh) | 2020-01-21 |
TWI682983B (zh) | 2020-01-21 |
US20170260425A1 (en) | 2017-09-14 |
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