JP5171332B2 - Release sheet, polarizing plate with release sheet, and substrate-less double-sided adhesive sheet - Google Patents
Release sheet, polarizing plate with release sheet, and substrate-less double-sided adhesive sheet Download PDFInfo
- Publication number
- JP5171332B2 JP5171332B2 JP2008069424A JP2008069424A JP5171332B2 JP 5171332 B2 JP5171332 B2 JP 5171332B2 JP 2008069424 A JP2008069424 A JP 2008069424A JP 2008069424 A JP2008069424 A JP 2008069424A JP 5171332 B2 JP5171332 B2 JP 5171332B2
- Authority
- JP
- Japan
- Prior art keywords
- release sheet
- release
- sensitive adhesive
- sio
- alkenyl group
- 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.)
- Active
Links
- 239000000853 adhesive Substances 0.000 title claims description 23
- 230000001070 adhesive effect Effects 0.000 title claims description 23
- 239000010410 layer Substances 0.000 claims description 78
- 239000003795 chemical substances by application Substances 0.000 claims description 63
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 46
- 239000000758 substrate Substances 0.000 claims description 44
- 125000003342 alkenyl group Chemical group 0.000 claims description 33
- 229920001296 polysiloxane Polymers 0.000 claims description 31
- 229920002050 silicone resin Polymers 0.000 claims description 31
- 239000011342 resin composition Substances 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 20
- 229920005989 resin Polymers 0.000 claims description 19
- 239000011347 resin Substances 0.000 claims description 19
- 229920006267 polyester film Polymers 0.000 claims description 18
- 238000007259 addition reaction Methods 0.000 claims description 17
- 125000004432 carbon atom Chemical group C* 0.000 claims description 15
- 238000009826 distribution Methods 0.000 claims description 15
- 239000012790 adhesive layer Substances 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 125000006038 hexenyl group Chemical group 0.000 claims description 7
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 5
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 5
- 125000001931 aliphatic group Chemical group 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 12
- 238000001723 curing Methods 0.000 description 12
- 238000007689 inspection Methods 0.000 description 12
- 230000007547 defect Effects 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- 230000001681 protective effect Effects 0.000 description 10
- 239000000243 solution Substances 0.000 description 9
- 239000003431 cross linking reagent Substances 0.000 description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- 239000000178 monomer Substances 0.000 description 7
- -1 polyethylene terephthalate Polymers 0.000 description 7
- 239000002390 adhesive tape Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000010030 laminating Methods 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 229920000058 polyacrylate Polymers 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000011179 visual inspection Methods 0.000 description 3
- 239000004985 Discotic Liquid Crystal Substance Substances 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229920006243 acrylic copolymer Polymers 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 150000003058 platinum compounds Chemical class 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920001843 polymethylhydrosiloxane Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 229920006222 acrylic ester polymer Polymers 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000007611 bar coating method Methods 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007607 die coating method Methods 0.000 description 1
- 125000005388 dimethylhydrogensiloxy group Chemical group 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000007756 gravure coating Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000004365 octenyl group Chemical group C(=CCCCCCC)* 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920003209 poly(hydridosilsesquioxane) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006290 polyethylene naphthalate film Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000002683 reaction inhibitor Substances 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
- Laminated Bodies (AREA)
- Adhesive Tapes (AREA)
Description
本発明は、剥離シート、剥離シート付き偏光板、及び基材レス両面粘着シートに関する。 The present invention relates to a release sheet, a polarizing plate with a release sheet, and a substrate-less double-sided pressure-sensitive adhesive sheet.
近年、ＬＣＤは技術進歩が著しく大画面化されつつあり、それに伴いバックライトの輝度を上げた、いわゆる高輝度タイプのＬＣＤが普及しつつある。このようなＬＣＤでは、偏光板等のＬＣＤを構成する各部材における異物や欠陥等（いわゆる、欠点）が微小であっても、ディスプレイ中に視認可能な輝点となって現われるので、欠点の検査精度を向上させることが重要となってきている。 In recent years, LCDs have been remarkably advanced in technology and have become larger in screen, and accordingly, so-called high-brightness type LCDs with increased backlight brightness are becoming popular. In such an LCD, even if a foreign matter or a defect (so-called defect) in each member constituting the LCD such as a polarizing plate is very small, it appears as a bright spot visible in the display, so the defect is inspected. It has become important to improve accuracy.
例えば、偏光板における欠点検査は、クロスニコル法による目視検査で行われるのが一般的である。クロスニコル法は、２枚の偏光板をその配向主軸が直交するように重ねて消光状態としたとき、欠点があればそこが輝点となって現れるので、それにより目視による欠点検査ができるというものである。 For example, the defect inspection in the polarizing plate is generally performed by visual inspection by the crossed Nicols method. In the crossed Nicols method, when two polarizing plates are overlapped so that their orientation main axes are orthogonal to each other and put into a quenching state, if there is a defect, it appears as a bright spot, so that it can be visually inspected for a defect. Is.
偏光板は、粘着剤によって液晶セル等の他の部材に貼付されてＬＣＤに組み入れられるものであるが、操作の簡便性等を目的として、偏光板の一面には予め剥離シート付きの粘着剤が貼合されているのが一般的である。このような偏光板は通常、剥離シートが貼付されたまま、クロスニコル法による目視検査が行われる。そのため、剥離シートの基材には、クロスニコル法による検査の障害とならないように、配向主軸の傾き（配向角）が小さいフィルムが使用されることが知られている（例えば、特許文献１参照）。 The polarizing plate is affixed to another member such as a liquid crystal cell with an adhesive and incorporated into the LCD. For the purpose of ease of operation, an adhesive with a release sheet is previously provided on one surface of the polarizing plate. It is generally pasted. Such a polarizing plate is usually visually inspected by the crossed Nicols method with the release sheet attached. Therefore, it is known that a film having a small inclination (orientation angle) of the orientation main axis is used for the base material of the release sheet so as not to hinder the inspection by the crossed Nicols method (for example, see Patent Document 1). ).
また、従来、偏光板用途で使用される剥離シートの剥離剤層は、基材の一方の面にシリコーン樹脂組成物が塗布、加熱硬化されて形成されることが知られている。上記シリコーン樹脂組成物の主剤には、例えば、ビニル基を備えたオルガノポリシロキサンが使用されている（例えば、特許文献２参照）。
しかし、特許文献２に記載されたシリコーン樹脂組成物を用いて剥離剤層を形成すると、剥離剤層の硬化性を良好にするために、硬化温度を高くしなければならないが、剥離シート基材はそのような高温加熱により、熱収縮して配向角の分布範囲（最大値と最小値の差）が変化してしまうことがある。したがって、剥離シート基材として配向角の分布範囲が小さいフィルムを用いても、剥離剤層形成後には剥離シート基材の配向角の分布範囲が大きくなって、剥離シート基材がクロスニコル法による検査の妨げとなり、検査精度を十分に向上させることができないという問題がある。一方、剥離シート基材の配向角変化を抑えるために、硬化時の加熱温度を低くすると、剥離剤層が十分に硬化されず、剥離剤層の剥離性能が低下するという問題がある。 However, when the release agent layer is formed using the silicone resin composition described in Patent Document 2, in order to improve the curability of the release agent layer, the curing temperature must be increased. Due to such high-temperature heating, the orientation angle distribution range (difference between the maximum value and the minimum value) may change due to heat shrinkage. Therefore, even if a film having a small orientation angle distribution range is used as the release sheet substrate, after the release agent layer is formed, the distribution range of the orientation angle of the release sheet substrate becomes large, and the release sheet substrate is obtained by the crossed Nicols method. There is a problem that the inspection accuracy is hindered and the inspection accuracy cannot be sufficiently improved. On the other hand, if the heating temperature at the time of curing is lowered in order to suppress the change in the orientation angle of the release sheet substrate, the release agent layer is not sufficiently cured, and there is a problem that the release performance of the release agent layer is lowered.
そこで、本発明はこれら問題点に鑑みてなされたものであり、偏光板に貼付されたときにクロスニコル法による検査において、精度の高い検査を実現でき、かつ剥離性能が良好な剥離シート、並びにその剥離シートが用いられた剥離シート付き偏光板及び基材レス両面粘着シートを提供することを目的とする。 Therefore, the present invention has been made in view of these problems, a release sheet that can achieve high-precision inspection and has good release performance when inspected by the crossed Nicols method when attached to a polarizing plate, and It aims at providing the polarizing plate with a peeling sheet in which the peeling sheet was used, and a base-material-free double-sided adhesive sheet.
本発明に係る剥離シートは、剥離シート基材の一方の面に剥離剤層が設けられた剥離シートであって、剥離シート基材が、一軸又は二軸延伸ポリエステルフィルムであり、剥離剤層が、分子中に炭素数６〜１０のアルケニル基を備えたオルガノポリシロキサンと、分子中にアルケニル基を備えたＭＱレジンとを含む付加反応型シリコーン樹脂組成物を硬化被膜したものであると共に、剥離シートからサンプリングした試料において、任意方向に設定した直線軸に対する剥離シート基材の配向主軸の傾き（配向角）の分布範囲（最大値と最小値の差）が５°以下であることを特徴とする。 The release sheet according to the present invention is a release sheet in which a release agent layer is provided on one surface of a release sheet substrate, the release sheet substrate is a uniaxial or biaxially stretched polyester film, and the release agent layer is And a cured coating of an addition-reactive silicone resin composition containing an organopolysiloxane having an alkenyl group having 6 to 10 carbon atoms in the molecule and an MQ resin having an alkenyl group in the molecule. In the sample sampled from the sheet, the distribution range (difference between the maximum value and the minimum value) of the inclination (orientation angle) of the orientation principal axis of the release sheet substrate with respect to the linear axis set in an arbitrary direction is 5 ° or less. To do.
上記直線軸を上記ポリエステルフィルムの延伸時の長手方向又は幅方向に設定した場合の、上記剥離シート基材の配向主軸の傾き（配向角）の最大値が５°以下であることが好ましい。 When the linear axis is set in the longitudinal direction or the width direction during stretching of the polyester film, the maximum value of the inclination (orientation angle) of the orientation main axis of the release sheet substrate is preferably 5 ° or less.
ＭＱレジンは、ＳｉＯ２単位、（ＣＨ３）３ＳｉＯ１／２単位、及びＣＨ２＝ＣＨ（ＣＨ２）ｚ（ＣＨ３）２ＳｉＯ１／２単位（式中、ｚは０〜４の整数を示す）を有する構造のシリコーンレジンであることが好ましい。 MQ resin is SiO 2 unit, (CH 3 ) 3 SiO 1/2 unit, and CH 2 ═CH (CH 2 ) z (CH 3 ) 2 SiO 1/2 unit (wherein z is an integer of 0 to 4). It is preferable that it is a silicone resin having a structure having
本発明に係る剥離シート付き偏光板は、偏光板、粘着剤層、及び剥離シートがこの順に設けられた剥離シート付き偏光板であって、剥離シートは、剥離シート基材の一方の面に剥離剤層が設けられて構成されると共に、剥離剤層が粘着剤層に剥離可能に仮着されており、剥離シート基材が、一軸又は二軸延伸ポリエステルフィルムであり、剥離剤層が、分子中に炭素数６〜１０のアルケニル基を備えたオルガノポリシロキサンと、分子中にアルケニル基を備えたＭＱレジンとを含む付加反応型シリコーン樹脂組成物を硬化被膜したものであると共に、上記剥離シートからサンプリングした試料において、任意方向に設定した直線軸に対する剥離シート基材の配向主軸の傾き（配向角）の分布範囲が５°以下であることを特徴とする。 The polarizing plate with a release sheet according to the present invention is a polarizing plate with a release sheet in which a polarizing plate, an adhesive layer, and a release sheet are provided in this order, and the release sheet is peeled off on one surface of the release sheet substrate. The release agent layer is temporarily attached to the pressure-sensitive adhesive layer, the release sheet substrate is a uniaxial or biaxially stretched polyester film, and the release agent layer is a molecule. The release sheet is a cured coating of an addition-reactive silicone resin composition containing an organopolysiloxane having an alkenyl group having 6 to 10 carbon atoms and an MQ resin having an alkenyl group in the molecule. In the sample sampled from the above, the distribution range of the inclination (orientation angle) of the orientation principal axis of the release sheet substrate with respect to the linear axis set in an arbitrary direction is 5 ° or less.
上記直線軸を上記ポリエステルフィルムの延伸時の長手方向又は幅方向に設定した場合の、上記剥離シート基材の配向主軸の傾き（配向角）の最大値が５°以下であることが好ましい。 When the linear axis is set in the longitudinal direction or the width direction during stretching of the polyester film, the maximum value of the inclination (orientation angle) of the orientation main axis of the release sheet substrate is preferably 5 ° or less.
また、本発明に係る基材レス両面粘着シートは、粘着剤層の両面に、軽剥離シート、重剥離シートそれぞれが積層される基材レス両面粘着シートであって、重剥離シートが、剥離シート基材の一方の面に剥離剤層が設けられて構成されると共に、剥離剤層が粘着剤層に剥離可能に仮着されており、軽剥離シートの粘着剤層に対する剥離力が、重剥離シートの粘着剤層に対する剥離力より低く、剥離シート基材が、一軸又は二軸延伸ポリエステルフィルムであり、剥離剤層が、分子中に炭素数６〜１０のアルケニル基を備えたオルガノポリシロキサンと、分子中にアルケニル基を備えたＭＱレジンとを含む付加反応型シリコーン樹脂組成物を硬化被膜したものであると共に、前記剥離シートからサンプリングした試料において、任意方向に設定した直線軸に対する剥離シート基材の配向主軸の傾き（配向角）の分布範囲が５°以下であることを特徴とする。 Further, the substrate-less double-sided pressure-sensitive adhesive sheet according to the present invention is a substrate-less double-sided pressure-sensitive adhesive sheet in which a light release sheet and a heavy release sheet are laminated on both sides of an adhesive layer, and the heavy release sheet is a release sheet. The release agent layer is provided on one side of the base material, and the release agent layer is temporarily attached to the adhesive layer so that it can be peeled off. An organopolysiloxane having a lower release force than the adhesive layer of the sheet, the release sheet base material being a uniaxial or biaxially stretched polyester film, and the release agent layer having an alkenyl group having 6 to 10 carbon atoms in the molecule; And a cured coating of an addition reaction type silicone resin composition containing MQ resin having an alkenyl group in the molecule, and set in an arbitrary direction in a sample sampled from the release sheet Wherein the distribution range of the inclination of the orientation main axis of the release sheet substrate (orientation angle) with respect to the linear axis has is 5 ° or less.
上記直線軸を上記ポリエステルフィルムの延伸時の長手方向又は幅方向に設定した場合の、上記剥離シート基材の配向主軸の傾き（配向角）の最大値が５°以下であることが好ましい。 When the linear axis is set in the longitudinal direction or the width direction during stretching of the polyester film, the maximum value of the inclination (orientation angle) of the orientation main axis of the release sheet substrate is preferably 5 ° or less.
上記粘着剤層は、２３℃における貯蔵弾性率（Ｇ’）が０．３ＭＰａ以上である粘着剤によって形成されることが好ましい。 The pressure-sensitive adhesive layer is preferably formed of a pressure-sensitive adhesive having a storage elastic modulus (G ′) at 23 ° C. of 0.3 MPa or more.
本発明においては、剥離剤に所定のシリコーン樹脂組成物を用いることにより、比較的低い温度で剥離剤層を硬化しても、その硬化性を良好にすることができるので、剥離シートの剥離性能を良好なものにすることができる。また、剥離剤層を低温で硬化することにより、剥離剤層形成後においても、剥離シート基材の小さな配向角の分布範囲を維持することができるので、クロスニコル法による検査において、精度の高い検査を実施できる。 In the present invention, by using a predetermined silicone resin composition as a release agent, even if the release agent layer is cured at a relatively low temperature, the curability can be improved, so that the release performance of the release sheet Can be improved. In addition, by curing the release agent layer at a low temperature, it is possible to maintain a small orientation angle distribution range of the release sheet substrate even after the release agent layer is formed. Inspection can be performed.
以下本発明について、実施形態を用いてさらに詳細に説明する。
本発明の一実施形態に係る剥離シートは、剥離シート基材の一方の面に剥離剤層が積層されて構成されたものであり、例えば偏光板用途で使用されるものである。
Hereinafter, the present invention will be described in more detail using embodiments.
The release sheet according to one embodiment of the present invention is configured by laminating a release agent layer on one surface of a release sheet substrate, and is used for, for example, a polarizing plate.
剥離シートにおける剥離シート基材としては、配向主軸の傾き（配向角）の分布範囲が低い一軸又は二軸延伸ポリエステルフィルムが使用されるが、好ましくは二軸延伸ポリエステルフィルムが使用される。剥離シート基材の上に剥離剤層が硬化形成された後における剥離シートからサンプリングした試料において、任意方向に設定した直線軸に対する剥離シート基材の配向角の分布範囲は、５°以下、より好ましくは４°以下となっている。上記ポリエステルフィルムとしては、帯状のフィルムが幅方向（或いは長手方向）に延伸された一軸延伸フィルム、又は帯状のフィルムが幅方向及び長手方向に延伸された二軸延伸フィルムが使用される。そして、上記サンプリングした試料において、上記直線軸を延伸時のフィルムの長手方向又は幅方向に設定した場合の、剥離シート基材の配向主軸の傾き（配向角）の最大値が５°以下となっていることが好ましい。ポリエステルフィルムとしては、ポリエチレンテレフタレートフィルム、ポリエチレンナフタレートフィルム等が例示されるが、特に二軸延伸ポリエチレンテレフタレートフィルムが好適に使用される。その理由は、透明性、耐熱性、平面性、強度に優れているためである。 As the release sheet substrate in the release sheet, a uniaxial or biaxially stretched polyester film having a low distribution range of the orientation main axis inclination (orientation angle) is used, and a biaxially stretched polyester film is preferably used. In the sample sampled from the release sheet after the release agent layer is cured and formed on the release sheet substrate, the distribution range of the orientation angle of the release sheet substrate with respect to the linear axis set in an arbitrary direction is 5 ° or less, more Preferably it is 4 degrees or less. As the polyester film, a uniaxially stretched film in which a strip-shaped film is stretched in the width direction (or longitudinal direction) or a biaxially stretched film in which the strip-shaped film is stretched in the width direction and the longitudinal direction is used. And in the sampled sample, the maximum value of the inclination (orientation angle) of the orientation principal axis of the release sheet substrate when the linear axis is set in the longitudinal direction or the width direction of the film during stretching is 5 ° or less. It is preferable. Examples of the polyester film include a polyethylene terephthalate film and a polyethylene naphthalate film. A biaxially stretched polyethylene terephthalate film is particularly preferably used. The reason is because it is excellent in transparency, heat resistance, flatness, and strength.
本実施形態における剥離剤層は、剥離シート基材上に、適当な有機溶剤で希釈された付加反応型シリコーン樹脂組成物が塗工された後、加熱により、或いは加熱と紫外線等の光照射が併用されて、付加反応型シリコーン樹脂組成物が硬化被膜されて形成される。付加反応型シリコーン樹脂組成物は分子中に炭素数６〜１０のアルケニル基を備えたオルガノポリシロキサンから成る主剤に、分子中にアルケニル基を備えたＭＱレジン、架橋剤、及び触媒が加えられたものであり、所望により付加反応抑制剤、密着向上剤等が加えられても良い。また、剥離剤を硬化する工程で、加熱に加えて紫外線等の光照射が行われる場合、上記組成物には光開始剤が添加されていても良い。上記剥離剤層硬化時の加熱温度は、通常の剥離剤層を硬化させるときの加熱温度より低く、例えば、９５〜１０５℃であることが好ましい。 In the present embodiment, the release agent layer is coated with an addition reaction type silicone resin composition diluted with an appropriate organic solvent on a release sheet substrate, and then heated or irradiated with light such as heating and ultraviolet rays. In combination, the addition reaction type silicone resin composition is formed as a cured coating. In the addition reaction type silicone resin composition, an MQ resin having an alkenyl group in the molecule, a crosslinking agent, and a catalyst are added to the main agent composed of an organopolysiloxane having an alkenyl group having 6 to 10 carbon atoms in the molecule. However, if desired, an addition reaction inhibitor, an adhesion improver, and the like may be added. In the step of curing the release agent, in the case where light irradiation such as ultraviolet rays is performed in addition to heating, a photoinitiator may be added to the composition. The heating temperature at the time of curing the release agent layer is lower than the heating temperature at which an ordinary release agent layer is cured, and is preferably 95 to 105 ° C, for example.
炭素数６〜１０のアルケニル基を備えたオルガノポリシロキサンとしては、１分子中に少なくとも２個のアルケニル基を有するオルガノポリシロキサンが使用される。炭素数６〜１０のアルケニル基としては例えばヘキセニル基、オクテニル基等が挙げられるが、コスト等の観点からヘキセニル基が好ましい。このオルガノポリシロキサンの具体例としては、以下の一般式（Ｉ）で示されるものが例示される。
Ｒ１ ａＲ（３−ａ）ＳｉＯ（Ｒ２ＳｉＯ）ｍ（ＲＲ１ＳｉＯ）ｎＳｉＲ（３−ｂ）Ｒ１ ｂ
・・（Ｉ）
As the organopolysiloxane having an alkenyl group having 6 to 10 carbon atoms, an organopolysiloxane having at least two alkenyl groups in one molecule is used. Examples of the alkenyl group having 6 to 10 carbon atoms include a hexenyl group and an octenyl group, and a hexenyl group is preferable from the viewpoint of cost and the like. Specific examples of the organopolysiloxane include those represented by the following general formula (I).
R 1 a R (3-a) SiO (R 2 SiO) m (RR 1 SiO) n SiR (3-b) R 1 b
.. (I)
一般式（Ｉ）において、ａ、ｂ、ｍ及びｎは整数であって、０≦ａ≦３、０≦ｂ≦３であると共に、ｍ≧１、ｎ≧０である。Ｒは脂肪族不飽和結合を有しない同一又は異種の一価炭化水素基であると共に、Ｒ１は上述したように炭素数６〜１０のアルケニル基である。Ｒの一価炭化水素基としては、炭素数１〜１２、好ましくは１〜１０のものが挙げられ、具体的にはメチル基、エチル基、プロピル基等のアルキル基、トリル基やフェニル基等のアリール基が挙げられる。但し、硬化性及び剥離性の観点から、Ｒのうち８０モル％以上がメチル基であることが好ましい。 In the general formula (I), a, b, m and n are integers, 0 ≦ a ≦ 3, 0 ≦ b ≦ 3, and m ≧ 1 and n ≧ 0. R is the same or different monovalent hydrocarbon group having no aliphatic unsaturated bond, and R 1 is an alkenyl group having 6 to 10 carbon atoms as described above. Examples of the monovalent hydrocarbon group for R include those having 1 to 12 carbon atoms, preferably 1 to 10 carbon atoms. Specifically, alkyl groups such as a methyl group, an ethyl group and a propyl group, a tolyl group and a phenyl group Of the aryl group. However, from the viewpoint of curability and peelability, it is preferable that 80 mol% or more of R is a methyl group.
分子中にアルケニル基を備えたＭＱレジンとしては、例えば、ＳｉＯ２単位、（ＣＨ３）３ＳｉＯ１／２単位、及びＣＨ２＝ＣＨ（ＣＨ２）ｚ（ＣＨ３）２ＳｉＯ１／２単位（式中、ｚは０〜４の整数を示す）を有する構造のシリコーンレジンが使用される。ＭＱレジンの分子中のアルケニル基の含有量は、例えば、０．５〜５質量％であることが好ましい。本実施形態では、付加反応型シリコーン樹脂組成物にＭＱレジンが添加されることにより、剥離剤層の剥離力を向上させ、所望の剥離力に設定することが可能になる。シリコーン樹脂組成物においてＭＱレジンは、炭素数６〜１０のアルケニル基を備えたオルガノポリシロキサン１００質量部に対して、１〜５０質量部添加されることが好ましい。 Examples of the MQ resin having an alkenyl group in the molecule include, for example, SiO 2 units, (CH 3 ) 3 SiO 1/2 units, and CH 2 ═CH (CH 2 ) z (CH 3 ) 2 SiO 1/2 units. A silicone resin having a structure having (wherein z represents an integer of 0 to 4) is used. The content of the alkenyl group in the MQ resin molecule is preferably 0.5 to 5% by mass, for example. In the present embodiment, by adding MQ resin to the addition reaction type silicone resin composition, it becomes possible to improve the peeling force of the release agent layer and set it to a desired peeling force. In the silicone resin composition, the MQ resin is preferably added in an amount of 1 to 50 parts by mass with respect to 100 parts by mass of the organopolysiloxane having an alkenyl group having 6 to 10 carbon atoms.
架橋剤としては、例えば１分子中に少なくとも２個のケイ素原子に結合した水素原子（ヒドロシリル基）を有するオルガノポリシロキサンの架橋剤が使用される。具体的には、ジメチルハイドロジェンシロキシ基末端封鎖ジメチルシロキサン−メチルハイドロジェンシロキサン共重合体、トリメチルシロキシ基末端封鎖ジメチルシロキサン−メチルハイドロジェンシロキサン共重合体、トリメチルシロキシ基末端封鎖メチルハイドロジェンポリシロキサン、ポリ（ハイドロジェンシルセスキオキサン）等が挙げられる。本実施形態では、架橋剤のヒドロシリル基と、シリコーン樹脂組成物中のアルケニル基との付加反応により硬化被膜が形成される。 As the crosslinking agent, for example, an organopolysiloxane crosslinking agent having hydrogen atoms (hydrosilyl groups) bonded to at least two silicon atoms in one molecule is used. Specifically, dimethylhydrogensiloxy group end-capped dimethylsiloxane-methylhydrogensiloxane copolymer, trimethylsiloxy group end-capped dimethylsiloxane-methylhydrogensiloxane copolymer, trimethylsiloxy group end-capped methylhydrogenpolysiloxane, Poly (hydrogensilsesquioxane) etc. are mentioned. In this embodiment, a cured film is formed by an addition reaction between the hydrosilyl group of the crosslinking agent and the alkenyl group in the silicone resin composition.
架橋剤は、付加反応型シリコーン樹脂１００質量部に対して、０．１〜１００質量部、好ましくは０．３〜５０質量部含まれる。そして、架橋剤に含まれるケイ素原子に結合した水素原子の数は、付加反応型シリコーン樹脂組成物中のアルケニル基の数に対して、好ましくは１．０〜５．０（モル比）、より好ましくは１．２〜３．０（モル比）となる。上記モル比が１．０を下回ると組成物の硬化性が悪化し、５．０を超えると得られる剥離シートの剥離力が重くなりすぎる虞がある。 A crosslinking agent is 0.1-100 mass parts with respect to 100 mass parts of addition reaction type silicone resins, Preferably 0.3-50 mass parts is contained. The number of hydrogen atoms bonded to silicon atoms contained in the cross-linking agent is preferably 1.0 to 5.0 (molar ratio) relative to the number of alkenyl groups in the addition reaction type silicone resin composition. Preferably it will be 1.2-3.0 (molar ratio). When the molar ratio is less than 1.0, the curability of the composition is deteriorated, and when it exceeds 5.0, the peeling force of the obtained release sheet may be too heavy.
付加反応型シリコーン樹脂組成物に使用される触媒としては、例えば白金系化合物が使用される。白金系化合物の例としては、微粒子状白金、炭素粉末担体上に吸着された微粒子状白金、塩化白金酸、アルコール変性塩化白金酸、塩化白金酸のオレフィン錯体、パラジウム、ロジウム触媒等が挙げられる。白金族金属系触媒は、付加反応型シリコーン樹脂及び架橋剤の合計量に対し、白金系金属として１〜１０００質量ｐｐｍ程度添加される。 As a catalyst used for the addition reaction type silicone resin composition, for example, a platinum compound is used. Examples of the platinum compound include fine platinum, fine platinum adsorbed on a carbon powder carrier, chloroplatinic acid, alcohol-modified chloroplatinic acid, an olefin complex of chloroplatinic acid, palladium, rhodium catalyst, and the like. The platinum group metal catalyst is added in an amount of about 1 to 1000 mass ppm as a platinum metal based on the total amount of the addition reaction type silicone resin and the crosslinking agent.
本実施形態では、剥離剤の主剤に炭素数６〜１０のアルケニル基を備えたオルガノポリシロキサンを用いることにより、剥離剤層の加熱硬化時の加熱温度を比較的低温（例えば９５〜１０５℃）にしても、優れた硬化性を有する剥離剤層を形成することができる。このように硬化性の良好な剥離剤層は、剥離力の経時安定性に優れ、また粘着剤層から剥離シートを剥離したときに粘着剤層の接着力をほとんど低下させずに、残留接着力を良好なものとすることができる。さらに、加熱硬化時の加熱温度を低温にすることにより、剥離シート基材の熱収縮を抑え、基材本来の配向性を維持することができるので、上述したように剥離シート基材の剥離剤層形成後の配向角の分布範囲を５°以下とすることが可能になる。 In the present embodiment, by using an organopolysiloxane having an alkenyl group having 6 to 10 carbon atoms as the main component of the release agent, the heating temperature during heat curing of the release agent layer is relatively low (for example, 95 to 105 ° C.). Even so, a release agent layer having excellent curability can be formed. In this way, the release agent layer with excellent curability is excellent in the stability of release force over time, and the residual adhesive force hardly decreases when the release sheet is peeled off from the adhesive layer. Can be made good. Furthermore, since the heat shrinkage of the release sheet substrate can be suppressed and the original orientation of the substrate can be maintained by lowering the heating temperature during heat curing, the release agent for the release sheet substrate as described above. The distribution range of the orientation angle after the layer formation can be made 5 ° or less.
本発明の一実施形態に係る剥離シート付き偏光板は、偏光板（偏光フィルム）、粘着剤層、及び剥離シートがこの順に積層されたものであって、剥離シートとしては上述した剥離シートが使用され、剥離シートの剥離剤層と粘着剤層とが剥離可能なように仮着されている。剥離シート付き偏光板において剥離シートは、上記延伸時のポリエステルフィルムの長手方向又は幅方向が偏光板の偏光軸方向に一致するように積層されている。剥離シート付き偏光板は、剥離シートが剥離された後、露出された粘着剤層によって偏光板がその他の部材に貼り合わされるものである。 The polarizing plate with a release sheet according to an embodiment of the present invention is a laminate in which a polarizing plate (polarizing film), an adhesive layer, and a release sheet are laminated in this order, and the release sheet described above is used as the release sheet. The release agent layer and the pressure-sensitive adhesive layer of the release sheet are temporarily attached so as to be peelable. In the polarizing plate with a release sheet, the release sheet is laminated so that the longitudinal direction or the width direction of the polyester film at the time of stretching coincides with the polarization axis direction of the polarizing plate. In the polarizing plate with a release sheet, after the release sheet is peeled off, the polarizing plate is bonded to other members by the exposed adhesive layer.
粘着剤層を形成する粘着剤としては、偏光板用として用いられる粘着剤であれば特に制限なく使用されるが、好ましくは２３℃における貯蔵弾性率（Ｇ’）が０．３ＭＰａ以上である粘着剤が使用される。２３℃における貯蔵弾性率（Ｇ’）が０．３ＭＰａ以上である粘着剤は、高い光漏れ防止性を有するため、偏光板用途に好適に使用可能である。２３℃における貯蔵弾性率（Ｇ’）の上限については特に限定されないが、５０ＭＰａ以下であることが好ましく、さらに１５ＭＰａ以下であることが好ましい。粘着剤の２３℃における貯蔵弾性率（Ｇ’）の範囲は、特に好ましくは０．３５〜１２ＭＰａであり、最も好ましくは０．５〜５ＭＰａである。 The pressure-sensitive adhesive forming the pressure-sensitive adhesive layer is not particularly limited as long as it is a pressure-sensitive adhesive used for polarizing plates, but preferably has a storage elastic modulus (G ′) at 23 ° C. of 0.3 MPa or more. Agent is used. A pressure-sensitive adhesive having a storage elastic modulus (G ′) at 23 ° C. of 0.3 MPa or more has high light leakage prevention properties and can be suitably used for polarizing plates. The upper limit of the storage elastic modulus (G ′) at 23 ° C. is not particularly limited, but is preferably 50 MPa or less, and more preferably 15 MPa or less. The range of the storage elastic modulus (G ′) of the pressure-sensitive adhesive at 23 ° C. is particularly preferably 0.35 to 12 MPa, and most preferably 0.5 to 5 MPa.
例えば上記粘着剤としては、特開２００７−１９７６５９号公報に開示されるように、カルボキシル基を含有するモノマーがモノマー組成比で０．５質量％以下であるアクリル系共重合体と、活性エネルギー線硬化型化合物とを含む粘着性材料に、紫外線等の活性エネルギー線が照射されてなり、その活性エネルギー線照射後の２３℃における貯蔵弾性率（Ｇ’）が０．３ＭＰａ以上となる粘着剤が挙げられる。なお、上記アクリル系共重合体は、例えば（メタ）アクリル酸エステル重合体であり、またカルボキシル基を含有しないモノマーの重合体であることが好ましい。 For example, as the above-mentioned pressure-sensitive adhesive, as disclosed in Japanese Patent Application Laid-Open No. 2007-197659, an acrylic copolymer in which a monomer containing a carboxyl group has a monomer composition ratio of 0.5% by mass or less, and an active energy ray A pressure-sensitive adhesive containing an curable compound and irradiated with active energy rays such as ultraviolet rays and having a storage elastic modulus (G ′) at 23 ° C. after irradiation of the active energy rays of 0.3 MPa or more. Can be mentioned. The acrylic copolymer is, for example, a (meth) acrylic ester polymer, and is preferably a polymer of a monomer that does not contain a carboxyl group.
また粘着剤としては例えば、特開２００７−２１２９９５号公報に開示されるように、水酸基を含有するモノマーがモノマー組成比で１０質量％以下である重量平均分子量１００万以上のアクリル系重合体（（Ａ）成分）と、カルボキシル基を含有するモノマーがモノマー組成比で１０質量％以下である重量平均分子量１００万以上のアクリル系重合体（（Ｂ）成分）と、活性エネルギー線硬化型化合物とを含む粘着性材料に、活性エネルギー線が照射されてなるものが挙げられる。この粘着剤は活性エネルギー線照射後の２３℃における貯蔵弾性率（Ｇ’）が０．３ＭＰａ以上であり、かつ上記（Ａ）成分と（Ｂ）成分の質量比が１００：１〜１００：５０である。上記（Ａ）成分及び（Ｂ）成分は、例えば（メタ）アクリル酸エステル重合体であり、またそれぞれモノマー組成として０．１質量％以上の水酸基を含有するモノマー、及び０．１質量％以上のカルボキシル基を含有するモノマーを有していたほうが良い。 Moreover, as an adhesive, for example, as disclosed in JP-A-2007-212995, an acrylic polymer having a weight-average molecular weight of 1 million or more (( A) component), an acrylic polymer (component (B)) having a weight average molecular weight of 1,000,000 or more, wherein the monomer containing a carboxyl group is 10% by mass or less, and an active energy ray-curable compound. The adhesive material to be included includes those obtained by irradiating active energy rays. This pressure-sensitive adhesive has a storage elastic modulus (G ′) at 23 ° C. after irradiation with active energy rays of 0.3 MPa or more, and a mass ratio of the component (A) to the component (B) is from 100: 1 to 100: 50. It is. The component (A) and the component (B) are, for example, (meth) acrylic acid ester polymers, each of which contains a monomer composition containing 0.1% by mass or more of hydroxyl groups, and 0.1% by mass or more of monomers. It is better to have a monomer containing a carboxyl group.
これら粘着剤は、例えば剥離シートの剥離剤層の上に粘着性材料が塗工され適宜乾燥等された後に、活性エネルギー線が照射されることにより硬化されて粘着剤層に形成される。偏光板用途で用いられる粘着剤層は、貼合ずれ等を直すために、偏光板に貼り合わされた後剥がされることがある。上述した配合の粘着剤は、比較的低い粘着力を長期間にわたって安定して維持することが可能であるので、偏光板に貼り合わされてから長期間経過した後でも、偏光板から容易に剥がすことが可能である。また、上述した粘着剤は凝集力が高く、剥離シートの剥離力を高くすることを阻害するが、本実施形態のように炭素数６〜１０のアルケニル基を備えたオルガノポリシロキサンと、アルケニル基を備えたＭＱレジンとを含有する剥離剤組成物を用いれば、剥離シートの剥離力を十分に高めることができる。 These pressure-sensitive adhesives are, for example, formed on the pressure-sensitive adhesive layer by being coated with a pressure-sensitive adhesive material on the release layer of the release sheet and appropriately dried and then cured by irradiation with active energy rays. The pressure-sensitive adhesive layer used in the polarizing plate application may be peeled off after being bonded to the polarizing plate in order to correct bonding deviation or the like. Since the adhesive having the above-mentioned composition can stably maintain a relatively low adhesive force over a long period of time, it can be easily peeled off from the polarizing plate even after a long period of time since it has been bonded to the polarizing plate. Is possible. Moreover, although the adhesive mentioned above has a high cohesive force and inhibits the release force of the release sheet from being increased, an organopolysiloxane having an alkenyl group having 6 to 10 carbon atoms as in this embodiment, and an alkenyl group If the release agent composition containing MQ resin provided with is used, the release force of the release sheet can be sufficiently increased.
なお、本明細書において、重量平均分子量は、ゲルパーミエーションクロマトグラフィー（ＧＰＣ）法により測定したポリスチレン換算の値である。また、２３℃における貯蔵弾性率（Ｇ’）とは、厚さ３０μｍの粘着剤を積層し、８ｍｍΦ×３ｍｍ厚の円柱状の試験片を作製して、ねじり剪断法により、下記の条件で測定したものをいう。
測定装置：レオメトリック社製動的粘弾性測定装置「ＤＹＮＡＭＩＣ ＡＮＡＬＹＺＥＲ ＲＤＡII」
周波数 ：１Ｈｚ
温度 ：２３℃
In the present specification, the weight average molecular weight is a value in terms of polystyrene measured by gel permeation chromatography (GPC). The storage elastic modulus (G ′) at 23 ° C. is measured by the following conditions by laminating a 30 μm-thick adhesive and preparing a cylindrical test piece of 8 mmΦ × 3 mm thickness by the torsional shear method. What you did.
Measuring device: rheometric dynamic viscoelasticity measuring device "DYNAMIC ANALYZER RDAII"
Frequency: 1Hz
Temperature: 23 ° C
本発明の一実施形態に係る基材レス両面粘着シートは、粘着剤層の一方の面に剥離シートが、他方の面に保護シートが積層されて構成されたものである。基材レス両面粘着シートにおいて、粘着剤層及び剥離シートは、上述したものと同様の構成を有する。基材レス両面粘着シートにおいて、剥離シートは、いわゆる重剥離シートであり、剥離シートの剥離剤層と粘着剤層とが剥離可能なように仮着されている。保護シートは、いわゆる軽剥離シートであり、例えば、保護シート基材の一方の面に剥離剤層が積層されて構成され、その剥離剤層が粘着剤層に剥離可能に仮着されている。保護シートの剥離剤層は、好ましくはシリコーン系樹脂、特に好ましくは付加反応型シリコーン系樹脂によって形成されたものである。本実施形態における基材レス両面粘着シートは、例えば偏光板用途で使用され、保護シートが剥離された後、露出された粘着剤層が偏光板等に貼り合わされて使用される。このとき、上述した延伸時のポリエステルフィルムの長手方向又は幅方向が、偏光板の偏光軸方向に一致させられる。基材レス両面粘着シートは、保護シートによって使用直前まで粘着剤を保護して保管することが可能である。 The substrate-less double-sided pressure-sensitive adhesive sheet according to an embodiment of the present invention is configured by laminating a release sheet on one surface of a pressure-sensitive adhesive layer and a protective sheet on the other surface. In the substrate-less double-sided pressure-sensitive adhesive sheet, the pressure-sensitive adhesive layer and the release sheet have the same configuration as described above. In the substrate-less double-sided pressure-sensitive adhesive sheet, the release sheet is a so-called heavy release sheet, and is temporarily attached so that the release agent layer and the adhesive layer of the release sheet can be peeled off. The protective sheet is a so-called light release sheet. For example, the protective sheet is formed by laminating a release agent layer on one surface of the protective sheet substrate, and the release agent layer is temporarily attached to the pressure-sensitive adhesive layer so as to be peelable. The release agent layer of the protective sheet is preferably formed of a silicone resin, particularly preferably an addition reaction type silicone resin. The substrate-less double-sided pressure-sensitive adhesive sheet in the present embodiment is used for, for example, a polarizing plate. After the protective sheet is peeled off, the exposed pressure-sensitive adhesive layer is bonded to the polarizing plate or the like. At this time, the longitudinal direction or the width direction of the polyester film at the time of stretching described above is matched with the polarization axis direction of the polarizing plate. The substrate-less double-sided pressure-sensitive adhesive sheet can be stored while protecting the pressure-sensitive adhesive until just before use by the protective sheet.
剥離シート付き偏光板及び基材レス両面粘着シートにおいて、剥離シート（重剥離シート）の粘着剤層に対する剥離力は、２５〜１００ｍＮ／２０ｍｍであることが好ましく、３０〜９０ｍＮ／２０ｍｍであることがさらに好ましい。 In the polarizing plate with a release sheet and the double-sided pressure-sensitive adhesive sheet, the release force of the release sheet (heavy release sheet) to the adhesive layer is preferably 25 to 100 mN / 20 mm, and preferably 30 to 90 mN / 20 mm. Further preferred.
基材レス両面粘着シートにおいて、保護シート（軽剥離シート）の粘着剤層に対する剥離力は、剥離シート（重剥離シート）の粘着剤層に対する剥離力より低く、２〜８０ｍＮ／２０ｍｍであることが好ましく、２５〜７０ｍＮ／２０ｍｍであることがさらに好ましい。保護シート（軽剥離シート）の粘着剤層に対する剥離力をＸ［ｍＮ／２０ｍｍ］、剥離シート（重剥離シート）の粘着剤層に対する剥離力をＹ［ｍＮ／２０ｍｍ］とすると、Ｙ−Ｘ＞２０の関係を満足することが好ましい。このように、両シートの剥離力差を所定値以上にすることにより、保護シートを粘着剤層から剥離するときに生じる剥離不良を防止することができる。なお、ここで説明した剥離シート及び保護シートの剥離力は、下記で詳述するように、ＪＩＳ−Ｚ０２３７に準拠して測定されたものである。 In the base material-less double-sided pressure-sensitive adhesive sheet, the peel strength of the protective sheet (light release sheet) to the pressure-sensitive adhesive layer is 2 to 80 mN / 20 mm, which is lower than the peel strength of the release sheet (heavy release sheet) to the pressure-sensitive adhesive layer. Preferably, it is 25-70 mN / 20 mm. Assuming that the peel force of the protective sheet (light release sheet) to the adhesive layer is X [mN / 20 mm] and the peel force of the release sheet (heavy release sheet) is Y [mN / 20 mm], Y-X> It is preferable to satisfy 20 relationships. Thus, the peeling defect which arises when peeling a protective sheet from an adhesive layer can be prevented by making the peeling force difference of both sheets into more than predetermined value. In addition, the peeling force of the peeling sheet and protection sheet which were demonstrated here was measured based on JIS-Z0237 so that it may explain in full detail below.
本発明の各実施形態において、シリコーン樹脂組成物及び粘着剤材料は、例えば、グラビアコート法、バーコート法、スプレーコート法、スピンコート法、ナイフコート法、ロールコート法、ダイコート法等の既存の方法によって塗工される。 In each embodiment of the present invention, the silicone resin composition and the pressure-sensitive adhesive material are existing gravure coating methods, bar coating methods, spray coating methods, spin coating methods, knife coating methods, roll coating methods, die coating methods, and the like. Coated by the method.
本発明について、以下実施例を用いて説明するが、本発明は以下の実施例の構成に限定されるわけではない。 The present invention will be described below with reference to examples, but the present invention is not limited to the configurations of the following examples.
［実施例１］
〈剥離シートの作製〉
ヘキセニル基を備えたオルガノポリシロキサン及びヒドロシリル基を備えたオルガノポリシロキサンを含有するシリコーン樹脂溶液（東レ・ダウコーニング・シリコーン社製、商品名「ＬＴＣ−７５０Ａ」）を固形分換算で３０質量部と、ビニル基を備えたＭＱレジン（東レ・ダウコーニング・シリコーン社製、商品名「ＳＤ７２９２」）を固形分換算で３０質量部とを、トルエン溶媒にて固形分濃度が２．０質量％となるように希釈混合した。この溶液に白金系触媒（東レ・ダウコーニング・シリコーン社製、商品名「ＳＲＸ−２１２」）を３質量部添加し、付加反応型シリコーン樹脂組成物の溶液を得た。この溶液を乾燥後の膜厚が０．１μｍとなるように、厚さ３８μｍの幅方向及び長手方向に延伸された二軸延伸ポリエチレンテレフタレートフィルム（東レ社製、商品名「ルミラーＲ６４」）の上に、マイヤバーを用いて塗工した後、１００℃で３０秒間加熱乾燥させることにより上記組成物を硬化させて、剥離シート基材の上に剥離剤層を形成した剥離シートを得た。
[Example 1]
<Preparation of release sheet>
A silicone resin solution containing organopolysiloxane having hexenyl group and organopolysiloxane having hydrosilyl group (manufactured by Toray Dow Corning Silicone Co., Ltd., trade name “LTC-750A”) is 30 parts by mass in terms of solid content. , MQ resin with vinyl group (trade name “SD7292” manufactured by Toray Dow Corning Silicone Co., Ltd.) is 30 parts by mass in terms of solid content, and the solid content concentration is 2.0% by mass in a toluene solvent. Were diluted and mixed. 3 parts by mass of a platinum-based catalyst (trade name “SRX-212” manufactured by Toray Dow Corning Silicone Co., Ltd.) was added to this solution to obtain a solution of an addition reaction type silicone resin composition. On the biaxially stretched polyethylene terephthalate film (trade name “Lumirror R64”, manufactured by Toray Industries, Inc.) having a thickness of 38 μm and stretched in the width direction and the longitudinal direction so that the film thickness after drying of this solution becomes 0.1 μm. Then, after coating using a Myer bar, the composition was cured by heating and drying at 100 ° C. for 30 seconds to obtain a release sheet having a release agent layer formed on the release sheet substrate.
〈剥離シート付き偏光板の作製〉
上記剥離シートの剥離剤層の上に、粘着性材料溶液を乾燥後の膜厚が２５μｍとなるようにアプリケーターを用いて塗工した後、９０℃１分間乾燥して、粘着性材料層を形成した。なお、粘着性材料溶液は、それぞれ固形分換算で、アクリル酸ブチルの重合体１００質量部、トリス（アクリロキシエチル）イソシアヌレート（東亜合成社製、商品名「アロニックスＭ−３１５」）１５質量部、光重合開始剤（チバ・スペシャルティ・ケミカルズ社製、商品名「イルガキュア５００」）１．５質量部、ポリイソシアネート系架橋剤（日本ポリウレタン社製、商品名「コロネートＬ」４質量部、及びシランカップリング剤（信越化学工業社製「ＫＢＭ−４０３」）０．１質量部を添加混合したものに、さらに溶剤としてトルエンを加えて固形分を２０質量％に調整した溶液であった。次いで、ディスコティック液晶層付偏光フィルムから成る偏光板を、粘着性材料層とディスコティック液晶層とが密着するように、剥離シートに貼り合わせた。このとき、剥離シート基材に用いた二軸延伸ポリエチレンテレフタレートフィルムの延伸時の幅方向に設定した直線軸が偏光板の偏光軸と平行になるように貼り合わせた。貼り合わせてから３０分経過した後、剥離シート基材側から紫外線（ＵＶ）を下記の条件で照射して粘着性材料を硬化させて粘着剤層を形成し、剥離シート付き偏光板を得た。この剥離シート付き偏光板において、粘着剤層の厚さは２５μｍであった。また、粘着剤層の２３℃における貯蔵弾性率（Ｇ’）は０．９４ＭＰａであった。
<Production of polarizing plate with release sheet>
On the release agent layer of the release sheet, the adhesive material solution is applied using an applicator so that the film thickness after drying is 25 μm, and then dried at 90 ° C. for 1 minute to form an adhesive material layer. did. The adhesive material solution was, in terms of solid content, 100 parts by mass of a butyl acrylate polymer, 15 parts by mass of Tris (acryloxyethyl) isocyanurate (trade name “Aronix M-315” manufactured by Toagosei Co., Ltd.). , 1.5 parts by mass of a photopolymerization initiator (manufactured by Ciba Specialty Chemicals, trade name “Irgacure 500”), 4 parts by weight of a polyisocyanate-based cross-linking agent (manufactured by Nippon Polyurethane Co., Ltd., trade name “Coronate L”), and silane The solution was prepared by adding 0.1 parts by mass of a coupling agent (“KBM-403” manufactured by Shin-Etsu Chemical Co., Ltd.) and further adding toluene as a solvent to adjust the solid content to 20% by mass. Release sheet so that the adhesive material layer and the discotic liquid crystal layer are in close contact with the polarizing plate made of a polarizing film with a discotic liquid crystal layer. At this time, the biaxially stretched polyethylene terephthalate film used for the release sheet substrate was pasted so that the linear axis set in the width direction at the time of stretching was parallel to the polarizing axis of the polarizing plate. 30 minutes later, ultraviolet light (UV) was irradiated from the release sheet substrate side under the following conditions to cure the adhesive material to form an adhesive layer, and a release sheet-attached polarizing plate was obtained. In the polarizing plate with a sheet, the thickness of the pressure-sensitive adhesive layer was 25 μm, and the storage elastic modulus (G ′) at 23 ° C. of the pressure-sensitive adhesive layer was 0.94 MPa.
〈ＵＶ照射条件〉
フュージョン社製無電極ランプ Ｈバルブ使用
照度：６００ｍＷ／ｃｍ２、光量１５０ｍＪ／ｃｍ２
ＵＶ照度・光量計は、アイグラフィックス社製「ＵＶＰＦ−３６」を使用した。
<UV irradiation conditions>
Fusion company electrodeless lamp H bulb use illuminance: 600 mW / cm 2 , light quantity 150 mJ / cm 2
“UVPF-36” manufactured by Eye Graphics Co., Ltd. was used as the UV illuminance / light meter.
［比較例１］
シリコーン樹脂溶液として、ビニル基を備えたオルガノポリシロキサン及びヒドロシリル基を備えたオルガノポリシロキサンを含有するシリコーン樹脂溶液（東レ・ダウコーニング・シリコーン社製、商品名「ＢＹ−２４−５６１」）を用いたこと以外は実施例１と同様にして、剥離シート及び剥離シート付き偏光板を作製した。
[Comparative Example 1]
As the silicone resin solution, a silicone resin solution containing organopolysiloxane having a vinyl group and organopolysiloxane having a hydrosilyl group (trade name “BY-24-561” manufactured by Toray Dow Corning Silicone Co., Ltd.) is used. A release sheet and a release sheet-attached polarizing plate were produced in the same manner as in Example 1 except for that.
［比較例２］
付加反応型シリコーン樹脂組成物を硬化させるときの加熱乾燥温度を、１２０℃にした以外は、実施例１と同様にして、剥離シート及び剥離シート付き偏光板を作製した。
[Comparative Example 2]
A release sheet and a release sheet-attached polarizing plate were produced in the same manner as in Example 1 except that the heating and drying temperature when curing the addition reaction type silicone resin composition was 120 ° C.
各実施例及び比較例の剥離シートを以下の方法により評価した。
（１）残留接着率
各実施例、比較例において得られた剥離シートの剥離剤層側の面に、幅２０ｍｍ、長さ２０ｃｍの粘着テープ（日東電工社製、製品名「ポリエステル粘着テープ３１Ｂ」）を貼り合わせ、その上に９．８１×１０−３Ｎ／ｍｍ２の荷重をかけて７０℃で２４時間放置した。その後、さらに２３℃湿度６５％の条件下で２４時間放置した後、粘着テープを剥離シートから剥がして、ステンレス板に貼り付けた。そして、この粘着テープをステンレス板から１８０°の角度で速度３００ｍｍ／分の速度で剥がして接着力（Ａ）を測定した。また、ブランクとして剥離シートに貼り合わしていない粘着テープをステンレス板に貼り合わせて同様に接着力（Ｂ）を測定した。残留接着率を１００×（Ａ／Ｂ）として、以下の評価基準で評価した。
○：残留接着率が９０％以上であり、残留接着率が良好である。
△：残留接着率が８０％以上９０％未満であり、使用可能である。
×；残留接着率が８０％未満であり、使用不可能である。
The release sheets of each example and comparative example were evaluated by the following methods.
(1) Residual adhesion rate On the release agent layer side of the release sheet obtained in each example and comparative example, a 20 mm wide and 20 cm long adhesive tape (manufactured by Nitto Denko Corporation, product name “Polyester adhesive tape 31B”) ), And a load of 9.81 × 10 −3 N / mm 2 was applied thereon and left at 70 ° C. for 24 hours. Then, after leaving still for 24 hours on 23 degreeC humidity 65% conditions, the adhesive tape was peeled off from the peeling sheet, and it affixed on the stainless steel plate. And this adhesive tape was peeled from the stainless steel plate at an angle of 180 ° at a speed of 300 mm / min, and the adhesive force (A) was measured. Moreover, the adhesive force (B) was similarly measured by affixing the adhesive tape which has not been affixed on the peeling sheet as a blank to the stainless steel plate. The residual adhesion rate was set to 100 × (A / B), and the following evaluation criteria were used for evaluation.
○: The residual adhesion rate is 90% or more, and the residual adhesion rate is good.
Δ: Residual adhesion rate is 80% or more and less than 90%, and can be used.
X: Residual adhesion rate is less than 80% and cannot be used.
（２）基材収縮率
各実施例、比較例において、剥離剤層形成前後の剥離シート基材の幅方向における長さを測定して、剥離シート基材の収縮率を下記計算式を用いて算出した。
基材収縮率（％）＝１００−（剥離剤層形成後の剥離シート基材の幅方向における長さ／剥離剤層形成前の剥離シート基材の幅方向における長さ）×１００
(2) Base material shrinkage rate In each Example and Comparative Example, the length in the width direction of the release sheet base material before and after the release agent layer was formed was measured, and the shrinkage rate of the release sheet base material was calculated using the following formula. Calculated.
Substrate shrinkage (%) = 100− (length in release sheet substrate width direction after release agent layer formation / length in release sheet substrate width direction before release agent layer formation) × 100
（３）配向角
各実施例、比較例において、剥離剤層形成前後の剥離シート基材の配向主軸が、剥離シート基材の幅方向に設定した直線軸に対して何度傾いているかを明度計（大塚電子社製、商品名「ＲＥＴＳ Ｒ＆Ｄ」）により測定した。その測定は、幅方向における端部から端部まで均等に１０点で行い、配向角の最大値、最小値および分布範囲（最大値と最小値の差）を求めた。
(3) Orientation angle In each example and comparative example, how light the orientation main axis of the release sheet substrate before and after the release agent layer formation is inclined with respect to the linear axis set in the width direction of the release sheet substrate. It was measured by a total (trade name “RETS R & D” manufactured by Otsuka Electronics Co., Ltd.). The measurement was performed uniformly at 10 points from end to end in the width direction, and the maximum value, minimum value, and distribution range (difference between the maximum value and the minimum value) of the orientation angle were obtained.
（４）剥離力
各実施例、比較例において得られた剥離シート付き偏光板について、ＪＩＳ−Ｚ０２３７に準拠して引っ張り試験機を用いて剥離シートの剥離力を測定した。具体的には、剥離シート付き偏光板を幅２０ｍｍ、長さ２００ｍｍに裁断して、偏光板を固定し、剥離シートを剥離速度３００ｍｍ／分の速度で１８０°方向に引っ張ることにより、偏光板に対する剥離シートの剥離力を測定した。
(4) Peeling force About the polarizing plate with a peeling sheet obtained in each Example and the comparative example, the peeling force of the peeling sheet was measured using the tensile tester based on JIS-Z0237. Specifically, the polarizing plate with a release sheet is cut into a width of 20 mm and a length of 200 mm, the polarizing plate is fixed, and the release sheet is pulled in a 180 ° direction at a peeling rate of 300 mm / min, thereby The peel strength of the release sheet was measured.
（５）剥離力の経時変化
各実施例、比較例の剥離シート付き偏光板を作製した後、温度２３℃湿度５０％の条件下で７日間放置したときの剥離シートの剥離力（Ｆ１）を上記（４）の方法で測定した。同様に、温度２３℃湿度５０％の条件下で、作製後３０日間放置したときの剥離シートの剥離力（Ｆ２）を測定し、剥離力変化率（Ｆ２／Ｆ１）を算出して以下の基準で評価した。
○：０．６≦Ｆ２／Ｆ１≦１．４であるもの。
△：０．５≦Ｆ２／Ｆ１＜０．６又は１．４＜Ｆ２／Ｆ１≦１．５であるもの。
×：０．５≦Ｆ２／Ｆ１≦１．５の範囲外であるもの。
(5) Change in peeling force with time After producing the polarizing plate with a release sheet of each example and comparative example, the release force (F1) of the release sheet when left for 7 days at a temperature of 23 ° C. and a humidity of 50%. It measured by the method of said (4). Similarly, the peel strength (F2) of the release sheet when it was left for 30 days after production under the condition of a temperature of 23 ° C. and a humidity of 50% was measured, and the peel force change rate (F2 / F1) was calculated to calculate the following standard: It was evaluated with.
○: 0.6 ≦ F2 / F1 ≦ 1.4.
Δ: 0.5 ≦ F2 / F1 <0.6 or 1.4 <F2 / F1 ≦ 1.5.
X: Out of the range of 0.5 ≦ F2 / F1 ≦ 1.5.
（６）欠点検査性
各実施例、比較例において得られた剥離シート付き偏光板に、検査用の偏光板を重ねてクロスニコル法で目視観察して、欠点検査性を確認した。このとき、検査用の偏光板の偏光軸は、剥離シート付き偏光板の偏光軸と直交するようにし、かつ２枚の偏光板の間に剥離シートが配置されるようにした。光干渉が無く、目視検査可能であるものを○、光干渉があり、目視検査できないものを×とした。
(6) Defect inspection property The polarizing plate for a peeling sheet obtained in each Example and the comparative example was overlapped with the inspection polarizing plate, and visually observed by the crossed Nicols method, and defect inspection property was confirmed. At this time, the polarizing axis of the polarizing plate for inspection was set to be orthogonal to the polarizing axis of the polarizing plate with the release sheet, and the release sheet was disposed between the two polarizing plates. The case where there was no optical interference and visual inspection was possible was indicated as ◯, and the case where there was optical interference and visual inspection was not possible was indicated as X.
以上のように、実施例１では、剥離剤の硬化温度を比較的低温（１００℃）にして、剥離シート基材の熱収縮を抑えることにより、剥離剤層形成前の配向角の分布範囲を、剥離剤層形成後においても維持することができ、欠点検査性を良好にすることができた。一方、比較的高温（１２０℃）で剥離剤層を硬化した比較例２では、剥離シート基材が熱収縮して、剥離剤層形成前の配向角の分布範囲を維持することができず、欠点検査性を良好にすることができなかった。 As described above, in Example 1, the curing temperature of the release agent is set to a relatively low temperature (100 ° C.), and the thermal shrinkage of the release sheet substrate is suppressed, thereby reducing the orientation angle distribution range before the release agent layer is formed. Further, it could be maintained even after the release agent layer was formed, and the defect inspection property could be improved. On the other hand, in Comparative Example 2 in which the release agent layer was cured at a relatively high temperature (120 ° C.), the release sheet base material was thermally contracted, and the distribution range of the orientation angle before the release agent layer formation could not be maintained. The defect inspection property could not be improved.
また、実施例１では、剥離剤組成物にヘキセニル基を備えたオルガノポリシロキサンと、アルケニル基を備えたＭＱレジンとを用いたため、硬化温度を低温にしても残留接着率及び剥離力の経時変化のいずれも優れたものとすることができた。一方、剥離剤組成物にビニル基を備えたオルガノポリシロキサンを用いた比較例１では、硬化温度を低温にすると、剥離剤組成物が十分に硬化されないことにより、残留接着率が低下し、さらに剥離力の経時変化も大きくなり、良好な剥離性能を有する剥離シートを提供することができなかった。なお、実施例１と剥離剤組成物を同一のものを使用した比較例２においても、硬化温度を高くすることによって、剥離力の経時変化が大きくなり、良好な剥離性能を有する剥離シートを提供できなかった。 In Example 1, since the organopolysiloxane having a hexenyl group and the MQ resin having an alkenyl group were used in the release agent composition, even if the curing temperature was lowered, the residual adhesive rate and the change in peeling force with time were changed. All of these were excellent. On the other hand, in Comparative Example 1 using an organopolysiloxane having a vinyl group in the release agent composition, when the curing temperature is lowered, the release agent composition is not sufficiently cured, and the residual adhesion rate is further reduced. The change with time of the peeling force also increased, and a release sheet having good peeling performance could not be provided. In Example 2 and Comparative Example 2 in which the same release agent composition was used, a release sheet having good release performance was provided by increasing the curing temperature with increasing the curing temperature. could not.
Claims (12)
前記剥離シート基材が、一軸又は二軸延伸ポリエステルフィルムであり、
前記剥離剤層が、分子中に炭素数６〜１０のアルケニル基を備えたオルガノポリシロキサン（次のＭＱレジンを除く。）と、分子中にアルケニル基を備えたＭＱレジンとを含む付加反応型シリコーン樹脂組成物を硬化被膜したものであると共に、
前記剥離剤層が設けられた前記剥離シート基材において、任意方向に設定した直線軸に対する前記剥離シート基材の配向主軸の傾き（配向角）の分布範囲が５°以下であり、かつ前記直線軸を前記ポリエステルフィルムの延伸時の長手方向又は幅方向に設定した場合の、前記剥離シート基材の配向主軸の傾き（配向角）の最大値が５°以下であることを特徴とする剥離シート。 A release sheet provided with a release agent layer on one side of the release sheet substrate,
The release sheet substrate is a uniaxial or biaxially stretched polyester film,
An addition reaction type in which the release agent layer includes an organopolysiloxane having an alkenyl group having 6 to 10 carbon atoms in the molecule (excluding the following MQ resin) and an MQ resin having an alkenyl group in the molecule . The silicone resin composition is a cured coating,
In the release sheet base material, wherein the release agent layer is provided, Ri the distribution range is 5 ° der following the inclination of the orientation main axis of the release sheet substrate (orientation angle) with respect to the linear axis is set in an arbitrary direction, and wherein Peeling characterized in that the maximum value of the inclination (orientation angle) of the orientation main axis of the release sheet substrate when the linear axis is set in the longitudinal direction or the width direction during stretching of the polyester film is 5 ° or less. Sheet.
Ｒ １ ａ Ｒ （３−ａ） ＳｉＯ（Ｒ ２ ＳｉＯ） ｍ （ＲＲ １ ＳｉＯ） ｎ ＳｉＲ （３−ｂ） Ｒ １ ｂ ・・（Ｉ）
（一般式（Ｉ）において、ａ、ｂ、ｍ及びｎは整数であって、０≦ａ≦３、０≦ｂ≦３であると共に、ｍ≧１、ｎ≧０である。Ｒは脂肪族不飽和結合を有しない同一又は異種の一価炭化水素基であると共に、Ｒ １ は素数６〜１０のアルケニル基である。但し、Ｒのうち８０モル％以上がメチル基である。） The release sheet according to claim 1, wherein the organopolysiloxane is represented by the following general formula (I) .
R 1 a R (3-a) SiO (R 2 SiO) m (RR 1 SiO) n SiR (3-b) R 1 b ... (I)
(In the general formula (I), a, b, m and n are integers, 0 ≦ a ≦ 3, 0 ≦ b ≦ 3, and m ≧ 1, n ≧ 0. R is aliphatic. (It is the same or different monovalent hydrocarbon group having no unsaturated bond, and R 1 is an alkenyl group having 6 to 10 primes, provided that 80 mol% or more of R is a methyl group.)
前記剥離シートは、剥離シート基材の一方の面に剥離剤層が設けられて構成されると共に、前記剥離剤層が前記粘着剤層に剥離可能に仮着されており、
前記剥離シート基材が、一軸又は二軸延伸ポリエステルフィルムであり、
前記剥離剤層が、分子中に炭素数６〜１０のアルケニル基を備えたオルガノポリシロキサン（次のＭＱレジンを除く。）と、分子中にアルケニル基を備えたＭＱレジンとを含む付加反応型シリコーン樹脂組成物を硬化被膜したものであると共に、
前記剥離剤層が設けられた前記剥離シート基材において、任意方向に設定した直線軸に対する前記剥離シート基材の配向主軸の傾き（配向角）の分布範囲が５°以下であり、
前記直線軸を前記ポリエステルフィルムの延伸時の長手方向又は幅方向に設定した場合の、前記剥離シート基材の配向主軸の傾き（配向角）の最大値が５°以下であることを特徴とする剥離シート付き偏光板。 A polarizing plate with a release sheet in which a polarizing plate, an adhesive layer, and a release sheet are provided in this order,
The release sheet is configured by providing a release agent layer on one surface of a release sheet substrate, and the release agent layer is temporarily attached to the pressure-sensitive adhesive layer so as to be peelable,
The release sheet substrate is a uniaxial or biaxially stretched polyester film,
An addition reaction type in which the release agent layer includes an organopolysiloxane having an alkenyl group having 6 to 10 carbon atoms in the molecule (excluding the following MQ resin) and an MQ resin having an alkenyl group in the molecule . The silicone resin composition is a cured coating,
In the release sheet base material, wherein the release agent layer is provided, Ri the distribution range is 5 ° der following the inclination of the orientation main axis of the release sheet substrate (orientation angle) with respect to the linear axis is set in an arbitrary direction,
The maximum value of the inclination (orientation angle) of the orientation main axis of the release sheet substrate when the linear axis is set in the longitudinal direction or the width direction during stretching of the polyester film is 5 ° or less. Polarizing plate with release sheet.
Ｒ １ ａ Ｒ （３−ａ） ＳｉＯ（Ｒ ２ ＳｉＯ） ｍ （ＲＲ １ ＳｉＯ） ｎ ＳｉＲ （３−ｂ） Ｒ １ ｂ ・・（Ｉ）
（一般式（Ｉ）において、ａ、ｂ、ｍ及びｎは整数であって、０≦ａ≦３、０≦ｂ≦３であると共に、ｍ≧１、ｎ≧０である。Ｒは脂肪族不飽和結合を有しない同一又は異種の一価炭化水素基であると共に、Ｒ １ は素数６〜１０のアルケニル基である。但し、Ｒのうち８０モル％以上がメチル基である。） The organopolysiloxane, a polarizing plate-out peeling sea Mounting according to claim 4, characterized in that is represented by the following general formula (I).
R 1 a R (3-a) SiO (R 2 SiO) m (RR 1 SiO) n SiR (3-b) R 1 b ... (I)
(In the general formula (I), a, b, m and n are integers, 0 ≦ a ≦ 3, 0 ≦ b ≦ 3, and m ≧ 1, n ≧ 0. R is aliphatic. (It is the same or different monovalent hydrocarbon group having no unsaturated bond, and R 1 is an alkenyl group having 6 to 10 primes, provided that 80 mol% or more of R is a methyl group.)
前記重剥離シートが、剥離シート基材の一方の面に剥離剤層が設けられて構成されると共に、前記剥離剤層が前記粘着剤層に剥離可能に仮着されており、
前記軽剥離シートの前記粘着剤層に対する剥離力が、前記重剥離シートの前記粘着剤層に対する剥離力より低く、
前記剥離シート基材が、一軸又は二軸延伸ポリエステルフィルムであり、
前記剥離剤層が、分子中に炭素数６〜１０のアルケニル基を備えたオルガノポリシロキサン（次のＭＱレジンを除く。）と、分子中にアルケニル基を備えたＭＱレジンとを含む付加反応型シリコーン樹脂組成物を硬化被膜したものであると共に、
前記剥離シートからサンプリングした試料において、任意方向に設定した直線軸に対する剥離シート基材の配向主軸の傾き（配向角）の分布範囲が５°以下であり、
前記直線軸を前記ポリエステルフィルムの延伸時の長手方向又は幅方向に設定した場合の、前記剥離シート基材の配向主軸の傾き（配向角）の最大値が５°以下であることを特徴とする両面粘着シート。 On both sides of the pressure-sensitive adhesive layer, light release sheet, a both face adhesive sheet The heavy release sheet that is laminated,
The heavy release sheet is configured by being provided with a release agent layer on one surface of a release sheet base material, and the release agent layer is temporarily attached to the pressure-sensitive adhesive layer in a peelable manner,
The peeling force for the pressure-sensitive adhesive layer of the light release sheet is lower than the peeling force for the pressure-sensitive adhesive layer of the heavy release sheet,
The release sheet substrate is a uniaxial or biaxially stretched polyester film,
An addition reaction type in which the release agent layer includes an organopolysiloxane having an alkenyl group having 6 to 10 carbon atoms in the molecule (excluding the following MQ resin) and an MQ resin having an alkenyl group in the molecule . The silicone resin composition is a cured coating,
In samples sampled from the release sheet state, and are distributed range 5 ° following the slope of the orientation main axis (orientation angle) of the release sheet base material for the linear axes set at an arbitrary direction,
The maximum value of the inclination (orientation angle) of the orientation principal axis of the release sheet substrate when the linear axis is set in the longitudinal direction or the width direction when the polyester film is stretched is 5 ° or less . both face the pressure-sensitive adhesive sheet that.
とする請求項７に記載の両面粘着シート。
Ｒ １ ａ Ｒ （３−ａ） ＳｉＯ（Ｒ ２ ＳｉＯ） ｍ （ＲＲ １ ＳｉＯ） ｎ ＳｉＲ （３−ｂ） Ｒ １ ｂ ・・（Ｉ）
（一般式（Ｉ）において、ａ、ｂ、ｍ及びｎは整数であって、０≦ａ≦３、０≦ｂ≦３であると共に、ｍ≧１、ｎ≧０である。Ｒは脂肪族不飽和結合を有しない同一又は異種の一価炭化水素基であると共に、Ｒ １ は素数６〜１０のアルケニル基である。但し、Ｒのうち８０モル％以上がメチル基である。） The organopolysiloxane, both sides adhesive sheet according to claim 7, characterized in that is represented by the following general formula (I).
R 1 a R (3-a) SiO (R 2 SiO) m (RR 1 SiO) n SiR (3-b) R 1 b ... (I)
(In the general formula (I), a, b, m and n are integers, 0 ≦ a ≦ 3, 0 ≦ b ≦ 3, and m ≧ 1, n ≧ 0. R is aliphatic. (It is the same or different monovalent hydrocarbon group having no unsaturated bond, and R 1 is an alkenyl group having 6 to 10 primes, provided that 80 mol% or more of R is a methyl group.)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008069424A JP5171332B2 (en) | 2008-03-18 | 2008-03-18 | Release sheet, polarizing plate with release sheet, and substrate-less double-sided adhesive sheet |
| TW098106791A TWI444290B (en) | 2008-03-18 | 2009-03-03 | A release sheet, a polarizing plate with a release sheet, and a non-substrate double-sided adhesive sheet |
| CN2009101263893A CN101537726B (en) | 2008-03-18 | 2009-03-10 | Stripping film, polarizing film with stripping film and two-sided bonding sheet without base material |
| KR1020090022457A KR101502792B1 (en) | 2008-03-18 | 2009-03-17 | Releasing sheet, polarizing plate having the releasing sheet attached thereto, and substrateless double-sided adhesive sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008069424A JP5171332B2 (en) | 2008-03-18 | 2008-03-18 | Release sheet, polarizing plate with release sheet, and substrate-less double-sided adhesive sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2009220496A JP2009220496A (en) | 2009-10-01 |
| JP5171332B2 true JP5171332B2 (en) | 2013-03-27 |
Family
ID=41121208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008069424A Active JP5171332B2 (en) | 2008-03-18 | 2008-03-18 | Release sheet, polarizing plate with release sheet, and substrate-less double-sided adhesive sheet |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5171332B2 (en) |
| KR (1) | KR101502792B1 (en) |
| CN (1) | CN101537726B (en) |
| TW (1) | TWI444290B (en) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011173260A (en) * | 2010-02-23 | 2011-09-08 | Mitsubishi Plastics Inc | Biaxially-oriented polyester film, and release film using the same |
| JP2011224904A (en) * | 2010-04-21 | 2011-11-10 | Mitsubishi Plastics Inc | Mold release film for base material-less double-coated adhesive sheet |
| JP5553675B2 (en) * | 2010-04-29 | 2014-07-16 | 三菱樹脂株式会社 | Substrate-less double-sided adhesive sheet |
| JP6016323B2 (en) * | 2010-07-21 | 2016-10-26 | Dic株式会社 | Double-sided adhesive tape |
| JP2012071433A (en) * | 2010-09-28 | 2012-04-12 | Mitsubishi Plastics Inc | Release film |
| CN103229080B (en) * | 2010-12-27 | 2015-11-25 | 三菱树脂株式会社 | Mold release film |
| WO2013018602A1 (en) * | 2011-08-03 | 2013-02-07 | リンテック株式会社 | Gas barrier adhesive sheet, method for producing same, electronic member, and optical member |
| JP6081123B2 (en) | 2011-10-08 | 2017-02-15 | 三菱樹脂株式会社 | Substrate-less double-sided adhesive sheet |
| JP5856867B2 (en) * | 2012-02-16 | 2016-02-10 | リンテック株式会社 | Pressure-sensitive adhesive sheet, method of using pressure-sensitive adhesive sheet, and method of manufacturing pressure-sensitive adhesive sheet |
| JP2013181054A (en) * | 2012-02-29 | 2013-09-12 | Nitto Denko Corp | Pressure-sensitive adhesive product |
| JP5912772B2 (en) * | 2012-03-30 | 2016-04-27 | リンテック株式会社 | Substrate-less double-sided adhesive tape and method for producing the same, and adhesive roll and method for producing the same |
| CN103450821A (en) * | 2012-05-28 | 2013-12-18 | 祐鼎（福建）光电材料有限公司 | Base material-free optical adhesive tape and its manufacturing method |
| JP5650166B2 (en) * | 2012-07-19 | 2015-01-07 | 日東電工株式会社 | Adhesive sheet, electronic device member laminate, and optical member laminate |
| JP2014040040A (en) * | 2012-08-22 | 2014-03-06 | Lintec Corp | Double-sided release sheet and use method of the same |
| JP2014025069A (en) * | 2013-09-17 | 2014-02-06 | Mitsubishi Plastics Inc | Substrate-less double-sided adhesive sheet |
| JP6323851B2 (en) * | 2014-02-14 | 2018-05-16 | 日東電工株式会社 | Photoreactive material layer-containing sheet and method for producing the same |
| KR102285968B1 (en) * | 2014-08-08 | 2021-08-05 | 도레이첨단소재 주식회사 | Release film and double side adhesive film using the same |
| JP6519267B2 (en) * | 2015-03-27 | 2019-05-29 | 東レフィルム加工株式会社 | Release film |
| JP2017200973A (en) * | 2016-05-06 | 2017-11-09 | リンテック株式会社 | Substrate-less double-sided adhesive sheet |
| WO2019188735A1 (en) * | 2018-03-29 | 2019-10-03 | 日東電工株式会社 | Method for manufacturing polarizer |
| JP7102267B2 (en) * | 2018-07-10 | 2022-07-19 | リンテック株式会社 | Release film for ceramic green sheet manufacturing process |
| JP7285641B2 (en) * | 2018-12-21 | 2023-06-02 | 日東電工株式会社 | Adhesive sheet with release film and method for producing the same |
| JPWO2022024655A1 (en) * | 2020-07-31 | 2022-02-03 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01215857A (en) * | 1988-02-23 | 1989-08-29 | Shin Etsu Chem Co Ltd | Organopolysiloxane composition for release paper |
| JPH09164636A (en) * | 1995-12-15 | 1997-06-24 | Diafoil Co Ltd | Release film |
| JP2005047177A (en) * | 2003-07-30 | 2005-02-24 | Teijin Dupont Films Japan Ltd | Double-side release film |
| JP4524549B2 (en) * | 2003-08-14 | 2010-08-18 | 信越化学工業株式会社 | Release agent composition for silicone adhesive and release sheet using the same |
| JP4892922B2 (en) * | 2005-10-14 | 2012-03-07 | 信越化学工業株式会社 | Heavy release control agent and silicone composition for solventless release paper using the same |
| JP4814000B2 (en) * | 2006-07-26 | 2011-11-09 | リンテック株式会社 | Optical functional film bonding adhesive, optical functional film and method for producing the same |
| JP5419277B2 (en) * | 2007-03-30 | 2014-02-19 | リンテック株式会社 | Release sheet for stamper-receiving layer and sheet for producing optical recording medium |
-
2008
- 2008-03-18 JP JP2008069424A patent/JP5171332B2/en active Active
-
2009
- 2009-03-03 TW TW098106791A patent/TWI444290B/en active
- 2009-03-10 CN CN2009101263893A patent/CN101537726B/en active Active
- 2009-03-17 KR KR1020090022457A patent/KR101502792B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| KR101502792B1 (en) | 2015-03-16 |
| CN101537726B (en) | 2013-12-04 |
| TWI444290B (en) | 2014-07-11 |
| JP2009220496A (en) | 2009-10-01 |
| CN101537726A (en) | 2009-09-23 |
| KR20090100270A (en) | 2009-09-23 |
| TW200946333A (en) | 2009-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5171332B2 (en) | Release sheet, polarizing plate with release sheet, and substrate-less double-sided adhesive sheet | |
| JP5552338B2 (en) | Adhesive composition, adhesive and adhesive sheet | |
| JP4515357B2 (en) | Adhesive for polarizing plate, polarizing plate with adhesive and method for producing the same | |
| JP5047556B2 (en) | Adhesive for bonding optical functional film, optical functional film with adhesive, and method for producing the same | |
| KR102071644B1 (en) | Adhesive composition, adhesive and adhesive sheet | |
| JP5344224B2 (en) | Adhesive composition for polarizing plate | |
| JP6400537B2 (en) | Adhesive sheet and display | |
| JP6071224B2 (en) | Adhesive sheet | |
| KR20140106395A (en) | adhesion composition, an adhesive and adhesion sheet | |
| KR20140102132A (en) | adhesion composition, an adhesive and adhesion sheet | |
| KR20140102129A (en) | adhesion composition, an adhesive and adhesion sheet | |
| JP2017036394A (en) | Adhesive composition, adhesive, adhesive sheet and display body | |
| JP2011093957A (en) | Optical adhesive composition, optical adhesive, and optical film | |
| JP6895266B2 (en) | Adhesive sheet | |
| KR20140102130A (en) | adhesion composition, an adhesive and adhesion sheet | |
| KR20150002459A (en) | adhesion composition, an adhesive and adhesion sheet | |
| KR20150002458A (en) | adhesion composition, an adhesive and adhesion sheet | |
| JP5318589B2 (en) | Substrate-less double-sided adhesive sheet | |
| JP5889365B2 (en) | Adhesive composition, adhesive and adhesive sheet | |
| TW201542755A (en) | Silicone-based adhesive tape | |
| JP2016196527A (en) | Light-shielding adhesive tape and liquid crystal display device | |
| CN112074580A (en) | Adhesive layer, method for producing same, adhesive sheet, optical film with adhesive layer, and image display device | |
| JP2006307003A (en) | Pressure-sensitive adhesive composition and optical functional member with pressure-sensitive adhesive | |
| KR102041228B1 (en) | Double-sided adhesive sheet | |
| JP2018127560A (en) | Adhesive and adhesive sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20101124 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20120127 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20120207 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20120319 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20121218 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20121225 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5171332 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |