CN107216821A - The manufacture method of double-faced pressure-sensitive adhesive sheet, display body and display body - Google Patents
The manufacture method of double-faced pressure-sensitive adhesive sheet, display body and display body Download PDFInfo
- Publication number
- CN107216821A CN107216821A CN201710169138.8A CN201710169138A CN107216821A CN 107216821 A CN107216821 A CN 107216821A CN 201710169138 A CN201710169138 A CN 201710169138A CN 107216821 A CN107216821 A CN 107216821A
- Authority
- CN
- China
- Prior art keywords
- double
- adhesive sheet
- sensitive adhesive
- display body
- faced pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004820 Pressure-sensitive adhesive Substances 0.000 title claims abstract description 132
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 147
- 230000009477 glass transition Effects 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims description 70
- 229920005989 resin Polymers 0.000 claims description 57
- 239000011347 resin Substances 0.000 claims description 57
- 238000007711 solidification Methods 0.000 claims description 20
- 230000008023 solidification Effects 0.000 claims description 20
- 239000010410 layer Substances 0.000 description 255
- 239000000178 monomer Substances 0.000 description 78
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 73
- 229920000058 polyacrylate Polymers 0.000 description 59
- -1 (methyl) methyl Chemical group 0.000 description 49
- CERQOIWHTDAKMF-UHFFFAOYSA-N alpha-methacrylic acid Natural products CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 49
- 150000001875 compounds Chemical class 0.000 description 49
- 150000002148 esters Chemical class 0.000 description 44
- 239000003431 cross linking reagent Substances 0.000 description 41
- 238000000576 coating method Methods 0.000 description 31
- 229920000642 polymer Polymers 0.000 description 31
- 239000011248 coating agent Substances 0.000 description 29
- 229910052757 nitrogen Inorganic materials 0.000 description 19
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 18
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 16
- 239000011521 glass Substances 0.000 description 16
- 238000007639 printing Methods 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 15
- 239000000243 solution Substances 0.000 description 14
- 125000000524 functional group Chemical group 0.000 description 13
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 13
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 11
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 11
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- 125000004433 nitrogen atom Chemical group N* 0.000 description 11
- 229910052799 carbon Inorganic materials 0.000 description 10
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- 230000001590 oxidative effect Effects 0.000 description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 9
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- 239000012948 isocyanate Substances 0.000 description 6
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- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 5
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
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- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 4
- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical compound C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 4
- 239000012965 benzophenone Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 4
- 238000010894 electron beam technology Methods 0.000 description 4
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- JBFHTYHTHYHCDJ-UHFFFAOYSA-N gamma-caprolactone Chemical compound CCC1CCC(=O)O1 JBFHTYHTHYHCDJ-UHFFFAOYSA-N 0.000 description 4
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 4
- 150000002513 isocyanates Chemical class 0.000 description 4
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Natural products OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 4
- YPHQUSNPXDGUHL-UHFFFAOYSA-N n-methylprop-2-enamide Chemical compound CNC(=O)C=C YPHQUSNPXDGUHL-UHFFFAOYSA-N 0.000 description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- 239000011118 polyvinyl acetate Substances 0.000 description 4
- 229920002689 polyvinyl acetate Polymers 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009257 reactivity Effects 0.000 description 4
- 239000011342 resin composition Substances 0.000 description 4
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- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
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- 150000001252 acrylic acid derivatives Chemical class 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 125000003700 epoxy group Chemical group 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 150000002576 ketones Chemical class 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 3
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 3
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- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 3
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 2
- GNEPLYVYORHREW-UHFFFAOYSA-N 1,1,3,3,6-pentamethyl-7-nitro-2h-inden-5-amine Chemical compound CC1=C(N)C=C2C(C)(C)CC(C)(C)C2=C1[N+]([O-])=O GNEPLYVYORHREW-UHFFFAOYSA-N 0.000 description 2
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- IRHICGGRMJVIOW-UHFFFAOYSA-N 2-(2,4,6-trioxo-1,3,5-triazinan-1-yl)ethyl prop-2-enoate Chemical class C=CC(=O)OCCN1C(=O)NC(=O)NC1=O IRHICGGRMJVIOW-UHFFFAOYSA-N 0.000 description 2
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
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- 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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2431/00—Presence of polyvinyl acetate
- C09J2431/006—Presence of polyvinyl acetate in the substrate
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
- Laminated Bodies (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The present invention provide a kind of segment difference tracing ability it is excellent while, processability also good double-faced pressure-sensitive adhesive sheet and using the display body and its manufacture method obtained by the double-faced pressure-sensitive adhesive sheet.The double-faced pressure-sensitive adhesive sheet (2) that the present invention is provided possesses:It is used as the first adhering agent layer (21) of the outer layer of a surface side;It is used as the second adhering agent layer (22) of the outer layer of another surface side;And the intermediate layer (23) between the first adhering agent layer (21) and the second adhering agent layer (22), the glass transition temperature of intermediate layer (23) is more than 0 DEG C, less than 60 DEG C.
Description
Technical field
The present invention is the double-faced pressure-sensitive adhesive sheet and the use double-faced pressure-sensitive adhesive sheet institute on being suitable for pasting display body component parts
Obtained display body and its manufacture method.
Background technology
In recent years the various mobile electronic devices of intelligent mobile phone, tablet personal computer terminal etc., possess and have used with liquid crystal
The display of the display module of element, light emitting diode (LED element), organic electroluminescent (organic EL) element etc., by this
The situation that display is made contact panel also becomes many.In display as described above, generally, in the face side of display module
Provided with protection panels.
Here, between protection panels and display module, even if during provided with deforming protection panels because of external force, deformation
Protection panels will not also bump against the space of display module.
But, if there are space as described above, i.e. air layer, due to protection panels and the refractive index of air layer
Difference, and air layer and the light reflection loss of the refringence of display module it is big, and the image quality for having display is the problem of reduce.
Therefore, it is proposed to a kind of space filled by using adhering agent layer between protection panels and display module, to improve
The scheme of the image quality of display.But, in the display body module side of protection panels, the printing layer of frame-like is with the side of segment difference sometimes
Formula is present.If adhering agent layer does not follow the segment difference, adhering agent layer floats near segment difference, therefore can occur light reflection damage
Lose.Therefore, segment difference tracing ability is required to above-mentioned adhering agent layer.
To solve above-mentioned problem, patent document 1 is used as the adhesion in the space between landfill protection panels and display module
Oxidant layer, it is 1.0 × 10 to disclose a kind of shearing storage elastic modulus (G') in 25 DEG C, 1Hz5Below Pa and gel fraction is
More than 40% adhering agent layer.
Prior art literature
Patent document
Patent document 1:Japanese Unexamined Patent Publication 2010-97070 publications
The content of the invention
The technical problem to be solved in the present invention
In the invention disclosed in patent document 1, by reducing storage elastic modulus of the adhering agent layer in normal temperature
(G'), to lift segment difference tracing ability.But, the storage elastic modulus (G') during normal temperature is reduced if as discussed above, then sticker
The film-strength of layer can be reduced, and processability is deteriorated.For example, during by adhesive sheet processing of cutting etc., adhering agent layer, which can collapse, bursts and glues
Agent can overflow in section, occur the problem of sticker is attached to blade etc..
The present invention in view of above-mentioned actual conditions and complete, its object is to provide a kind of segment difference tracing ability excellent same
When, the good double-faced pressure-sensitive adhesive sheet of processability and use the display body and its manufacture method obtained by the double-faced pressure-sensitive adhesive sheet.
Solve the technological means of technical problem
To reach above-mentioned purpose, first, a kind of double-faced pressure-sensitive adhesive sheet of present invention offer, it is characterised in that possess:It is used as one side
First adhering agent layer of the outer layer of side;It is used as the second adhering agent layer of the outer layer of another surface side;And positioned at first sticker
Intermediate layer between layer and second adhering agent layer, the glass transition temperature in the intermediate layer is more than 0 DEG C and is less than 60 DEG C
(invention 1).
According to foregoing invention (invention 1), the glass transition temperature by making intermediate layer makes intermediate layer in normal temperature in above range
There is down a certain degree of hardness, thus, the overall film-strength of lifting double-faced pressure-sensitive adhesive sheet, and make processability good.In addition, passing through
Make the glass transition temperature in intermediate layer in above range, intermediate layer can be softened by heating, thus, overall soft of double-faced pressure-sensitive adhesive sheet
Soft and segment difference tracing ability becomes excellent.
In foregoing invention (invention 1), first adhering agent layer and the second adhering agent layer, preferably active energy ray are consolidated
The property changed (invention 2).
In foregoing invention (invention 1,2), the intermediate layer is preferably active energy ray-curable (invention 3).
In foregoing invention (invention 3), the intermediate layer preferably comprises glass transition temperature and is more than 0 DEG C and is less than 60 DEG C
Resin and active energy ray-curable composition (invention 4).
The double-faced pressure-sensitive adhesive sheet that foregoing invention (invention 1~4) is related to, preferably Young's modulus is more than 0.01MPa and is
Below 100MPa (invention 5).
In foregoing invention (invention 1~5), the thickness in the intermediate layer is relative to first adhering agent layer and described the
The ratio of the gross thickness of two adhering agent layers, preferably more than 0.05 and for less than 2 (invention 6).
The double-faced pressure-sensitive adhesive sheet that foregoing invention (invention 1~6) is related to, is preferably used to paste at least in the mask of side that is stuck
There are a display body component parts and another display body component parts (invention 7) of segment difference.
Second, the present invention provides a kind of double-faced pressure-sensitive adhesive sheet with stripping film, it is characterised in that possess:2 stripping films;
And in the way of the release surface with 2 stripping films is contacted, the double-faced pressure-sensitive adhesive sheet (invention 1 clamped by the stripping film
~7) (invention 8).
3rd, the present invention provides a kind of display body, it is characterised in that the display body components described below and obtain:At least in quilt
Pasting the face of side has a display body component parts of segment difference;Another display body component parts;And constitute a display body
The double-faced pressure-sensitive adhesive sheet (invention 1-7) that part and another display body component parts are mutually pasted and obtain and (invent 9).
4th, the present invention provides a kind of display body, it is characterised in that possess:At least there is segment difference in the face for the side that is stuck
A display body component parts;Another display body component parts;It will be used to paste the display body component parts and institute mutually
State the double-faced pressure-sensitive adhesive sheet (invention 2,3) of another display body component parts, double-faced pressure-sensitive adhesive sheet (invention after the solidification of solidification
10)。
5th, the present invention provides a kind of manufacture method of display body, it is characterised in that make a display body component parts
The layered product pasted with another display body component parts via the double-faced pressure-sensitive adhesive sheet (invention 2,3);To the layered product
Double-faced pressure-sensitive adhesive sheet irradiation active energy ray, make double-faced pressure-sensitive adhesive sheet solidification (invention 11).
Invention effect
Double-faced pressure-sensitive adhesive sheet of the present invention, while segment difference tracing ability is excellent, processability is good.In addition, in the present invention
In the display body being related to, by the excellent double-faced pressure-sensitive adhesive sheet of segment difference tracing ability, it can suppress that space occurs near segment difference, float
Deng.Furthermore, according to the manufacture method of display body of the present invention, the generation that near segment difference space can be obtained, floated etc.
The display body being inhibited.
Brief description of the drawings
Fig. 1 is the profile for the adhesive sheet that one embodiment of the present invention is related to.
Fig. 2 is the profile for the layered product that one embodiment of the present invention is related to.
Description of reference numerals
1:Double-faced pressure-sensitive adhesive sheet with stripping film;2:Double-faced pressure-sensitive adhesive sheet;2':Double-faced pressure-sensitive adhesive sheet after solidification;21:First adhesion
Oxidant layer;22:Second adhering agent layer;23:Intermediate layer;31、32:Stripping film;4:Display body;51:First display body component parts;
52:Second display body component parts;6:Printing layer.
Embodiment
Illustrate embodiments of the present invention below.
[double-faced pressure-sensitive adhesive sheet]
The section for the double-faced pressure-sensitive adhesive sheet that one embodiment of the present invention is related to is illustrated in Fig. 1.
As shown in figure 1, double-faced pressure-sensitive adhesive sheet 2 of the present embodiment possesses:It is used as the first adhesion of the outer layer of a surface side
Oxidant layer 21;It is used as the second adhering agent layer 22 of the outer layer of another surface side;And positioned at the first adhering agent layer 21 and the second adhering agent layer
Intermediate layer 23 between 22.
Double-faced pressure-sensitive adhesive sheet 2 of the present embodiment, in the way of the release surface with 2 stripping films 31,32 is contacted, by this
2 stripping films 31,32 are clamped, and the layered product is referred to as into the double-faced pressure-sensitive adhesive sheet 1 with stripping film.But, in double-faced pressure-sensitive adhesive sheet 2
In, stripping film 31 and/or stripping film 32 are not necessarily stacked.Furthermore, the release surface of the stripping film in this specification refers in stripping
From the face in piece with fissility, even if not imposing comprising the face for having imposed lift-off processing and lift-off processing and displaying that fissility
Face.
In the present embodiment, the first adhering agent layer 21 and the second adhering agent layer 22, are the outermost of double-faced pressure-sensitive adhesive sheet 2 respectively
Layer, the first adhering agent layer 21 is contacted with the release surface of stripping film 31, and the second adhering agent layer 22 is contacted with the release surface of stripping film 32,
But it is not limited to this.In addition, in the present embodiment, intermediate layer 23 is directly stacked with the first adhering agent layer 21, intermediate layer
23 are directly stacked with the second adhering agent layer 22, but are not limited to this.
The glass transition temperature (Tg) in the intermediate layer 23 in present embodiment is more than 0 DEG C, less than 60 DEG C.By making intermediate layer
23 glass transition temperature makes intermediate layer 23 have a certain degree of hardness at normal temperatures in the scope.Thus, double-faced pressure-sensitive adhesive sheet 2
Overall film-strength is also improved, and makes processability good.For example, the severing of double-faced pressure-sensitive adhesive sheet 1 with stripping film is processed
When, double-faced pressure-sensitive adhesive sheet 2 itself becomes to be not easy to collapse routed, in addition, by the presence in intermediate layer 23, due to being easier to routed first of collapsing
The sectional area of the adhering agent layer 22 of adhering agent layer 21 and second also diminishes, therefore, can suppress sticker and be overflowed in section and make to glue
The generation for the problem of agent is attached to blade etc..
On the other hand, by making the glass transition temperature in intermediate layer 23 in above range, intermediate layer 23 can be soft by heating
Change, the excellent flexibility for making double-faced pressure-sensitive adhesive sheet 2 overall.Therefore, double-faced pressure-sensitive adhesive sheet 2 is pasted on to the adherend (example with segment difference
Such as, display body component parts) when, by the way that the double-faced pressure-sensitive adhesive sheet 2 is heated, make segment difference tracing ability (initial stage of the double-faced pressure-sensitive adhesive sheet 2
Segment difference tracing ability) it is excellent, and suppress space occurs near segment difference, floats.
For above-mentioned viewpoint, the glass transition temperature in intermediate layer 23, preferably more than 20 DEG C, particularly preferably 30 DEG C with
On.In addition, the glass transition temperature, particularly preferably preferably less than 60 DEG C, less than 40 DEG C.Furthermore, the glass in this specification
Change the assay method of temperature, shown in test example as be described hereinafter.
Here, as described later, when the first adhering agent layer 21 and the second adhering agent layer 22 are active energy ray-curable, preferably
When further intermediate layer 23 is also active energy ray-curable, make these layer of solidification by using active energy ray irradiation, so that
Double-faced pressure-sensitive adhesive sheet 2, is not only the segment difference tracing ability at initial stage, even under the conditions of hot and humid, segment difference tracing ability is also excellent.Example
Such as, even if will be provided with:The layered product of adherend (for example, display body component parts) and double-faced pressure-sensitive adhesive sheet 2 with segment difference,
85 DEG C, place 72 hours under conditions of 85%RH, can also suppress near segment difference gassing, float, peel off.Furthermore,
This, so-called solidification (cured state) refers to irradiate by active energy ray and form new higher structure, even if by entering
The active energy ray irradiation of one step, also hardly further forms the state of higher structure.Whether there is and further form senior knot
Structure, such as can by the variable quantity of gel fraction judged.Specifically, irradiated by further active energy ray,
And during the incrementss of gel fraction very small (being preferably less than 5%), then can form cured state.
1. the first adhering agent layer and the second adhering agent layer
First adhering agent layer 21 and the second adhering agent layer 22, as long as it can play because of the effect above caused by intermediate layer 23,
It is not particularly limited, can is active energy ray-curable, or active energy ray non-curable, a preferably at least side is activity
Energy ray-curable, more preferably the first adhering agent layer 21 and the second adhering agent layer 22 are active energy ray-curable.Thus, it is double
The segment difference tracing ability of face adhesive sheet 2, the more than initial stage and segment difference tracing ability under high temperature hot conditions is also excellent.Furthermore,
Constitute the sticker of the first adhering agent layer and constitute the sticker of the second adhering agent layer, can be mutual identical sticker, also may be used
For different stickers.
When at least one of first adhering agent layer 21 and the second adhering agent layer 22 are active energy ray non-curable, as
The sticker of the adhering agent layer is constituted, for example, acrylic compounds sticker, rubber-like sticker, silicone sticker, polyurethanes
Sticker, polyesters sticker, glymes sticker etc..In addition, above-mentioned sticker, latex type, solvent-borne type or nothing
Solvent-borne type, cross-linking type or non-crosslinked type.In above-mentioned, preferably acrylic compounds sticker.
Furthermore, the adhering agent layer of active energy ray non-curable also can be by utilizing the sticker after active energy line curing
(by the sticker of active energy ray-curable before solidification) is constituted.
When at least one of first adhering agent layer 21 and the second adhering agent layer 22 are active energy ray-curable, constituting should
The sticker of adhering agent layer is the sticker (active energy ray-curable sticker) of active energy ray-curable.Active energy ray
Curability sticker, preferably at least any one of the monomer containing active energy ray-curable, oligomer and polymer, or
These mixture, in addition, also can be in the monomer containing active energy ray non-curable, oligomer and polymer it is any
One kind, or their mixture.
Above-mentioned active energy ray-curable sticker, be preferably by containing:(methyl) acrylate polymer (A);And it is living
Adherence composition (hereinafter sometimes referred to " the adherence composition P " of property energy ray-curable compound (B).) obtained by person.
Adherence composition P, preferably further containing crosslinking agent (C).Now, resulting sticker, by that will be glued using crosslinking agent (C)
Sticker obtained from (methyl) acrylate polymer (A) crosslinking in the property composition P constitutes (active energy line curing
Property compound (B) does not preferably polymerize and is present in adhering agent layer).Furthermore, in this manual, so-called (methyl) acrylic acid
Ester, refers to both acrylate and methacrylate.Other similar terms are also identical.In addition, " polymer " is also included
The concept of " copolymer ".
(1) active energy ray-curable sticker
(1-1) (methyl) acrylate polymer (A)
(methyl) acrylate polymer (A), passes through (methyl) alkyl acrylate that the carbon number containing alkyl is 1~20
Base ester can show preferably adherence as the monomeric unit for constituting the polymer.It is 1~20 as the carbon number of alkyl
(methyl) alkyl acrylate, can be enumerated, for example, (methyl) methyl acrylate, (methyl) ethyl acrylate, (methyl) propylene
Propyl propionate, (methyl) n-butyl acrylate, (methyl) acrylic acid n-pentyl ester, (methyl) the just own ester of acrylic acid, (methyl) acrylic acid
2- ethylhexyls, (methyl) Isooctyl acrylate monomer, the positive last of the ten Heavenly stems ester of (methyl) acrylic acid, positive ten diester of (methyl) acrylic acid, (methyl)
Myristyl ester, (methyl) acrylic acid palm ester, (methyl) octadecyl acrylate etc..Wherein, just further lifting adhesion
Property viewpoint for, the preferably carbon number of alkyl is 1-8 (methyl) acrylate, particularly preferred (methyl) acrylic acid normal-butyl
Or (methyl) acrylic acid 2- ethylhexyls.Furthermore, these can be used alone, and can also combine two or more and use.
(methyl) acrylate polymer (A), preferably comprise more than 40 mass %, particularly preferably containing 50 mass % with
(methyl) alkyl acrylate conduct that upper, further preferably more than 60 mass % alkyl carbon number is 1~20
Constitute the monomeric unit of the polymer.If (methyl) alkyl acrylate containing more than 40 mass %, can assign (first
Base) the appropriate adherence of acrylate polymer (A).Furthermore it is preferred that containing below 90 mass %, particularly preferably containing 80 matter
(methyl) acrylic acid alkyl that the carbon number of amount below %, further preferably below 70 mass % alkyl is 1~20
Ester., can be in (methyl) acrylate polymer (A) by making the content of (methyl) alkyl acrylate be below 90 mass %
Import the other monomers composition of desired amount.
(methyl) acrylate polymer (A), preferably is contained in monomer that intramolecular contains reactive functional groups (containing reaction
Property functional group monomer) be used as constitute the polymer monomeric unit.Reactivity of monomer containing reactive functional groups from this
Functional group, reacts with crosslinking agent described later (C), is consequently formed cross-linked structure (tridimensional network), can obtain with institute's phase
The sticker of the cohesiveness of prestige.
As the monomeric unit for constituting the polymer contained by (methyl) acrylate polymer (A) containing reactive official
The monomer that can be rolled into a ball, is preferably enumerated:There is the monomer (monomer of hydroxyl) of hydroxyl in intramolecular, there is carboxyl in intramolecular
Monomer (carboxylic monomer), there is monomer (monomer of amino-contained) of amido etc. in intramolecular.Wherein, particularly preferably with crosslinking
The monomer of the less hydroxyl of the reactive excellent, harmful effect to adherend of agent (C).
As the monomer of hydroxyl, it can enumerate, for example, (methyl) acrylic acid 2- hydroxy methacrylates, (methyl) acrylic acid 2-
Hydroxy propyl ester, (methyl) acrylic acid 3- hydroxy propyl esters, (methyl) acrylic acid 2- hydroxybutyls, (methyl) acrylic acid 3- hydroxyl fourths
(methyl) acrylic acid hydroxy alkyl ester of ester, (methyl) acrylic acid 4- hydroxybutyls etc. etc..Wherein, just in resulting (methyl) third
The reactivity of hydroxyl in olefine acid ester polymer (A) and crosslinking agent (C) and with for the viewpoint of the copolymerizable of other monomers, preferably
(methyl) acrylic acid 2- hydroxy methacrylates or (methyl) acrylic acid 4- hydroxybutyls.These can be used alone, also can be combined 2 kinds with
On use.
As the monomer containing carboxyl, it can enumerate, for example, acrylic acid, methacrylic acid, crotonic acid, maleic acid, clothing health
The ethene unsaturated carboxylic acid of acid, citraconic acid etc..Wherein, carboxylic just in resulting (methyl) acrylate polymer (A)
The reactivity of base and crosslinking agent (C) and with for the viewpoint of the copolymerizable of other monomers, preferred acrylic acid.They can individually make
With, also can be combined two or more use.
As the monomer of amino-contained, it can enumerate, for example, (methyl) acrylic acid aminoethyl, the positive fourth of (methyl) acrylic acid
Base aminoethyl etc..They can be used alone, and two or more also can be combined and uses.Furthermore, the monomer quilt of nitrogen atom described later
Excluded from the monomer of the amino-contained.
(methyl) acrylate polymer (A), when the monomer comprising hydroxyl is as the monomeric unit for constituting the polymer,
The lower limit of its content is preferably more than 3 mass %, particularly preferably more than 10 mass %, more preferably 15 mass % with
On.In addition, the higher limit of its content, preferably below 35 mass %, particularly preferably below 30 mass %, more preferably
Below 25 mass %.When (methyl) acrylate polymer (A) is using monomer of the above-mentioned amount comprising hydroxyl as monomeric unit,
A certain amount of hydroxyl then can be remained in resulting sticker.Hydroxyl is hydrophilic group, and hydrophilic radical so is with ormal weight
When being present in sticker, though then sticker be placed on it is hot and humid under the conditions of, with the conditions of this is hot and humid immerse
The intermiscibility of the moisture of sticker is also good, as a result, the albefaction (moisture-proof of sticker when can suppress to return to ambient temperature and moisture
Hot albefaction is excellent).
(methyl) acrylate polymer (A), during comprising carboxylic monomer as the monomeric unit for constituting the polymer,
The lower limit of its content is preferably more than 0.5 mass % more preferably more than 3 mass %, particularly preferably more than 7 mass %.
In addition, the higher limit of its content is preferably below 20 mass &, more preferably below 17 mass %, particularly preferably 13 mass %
Below.
Furthermore, adherend is susceptible to the dysgenic material of acid, for example, nesa coating or metal wiring etc.
When, (methyl) acrylate polymer (A) is preferably used as the monomer list for constituting the polymer not comprising carboxylic monomer
Member.Thereby, it is possible to suppress such as corrosion nesa coating or metal wiring, or make the resistance change of nesa coating.
Here, so-called " not including carboxylic monomer ", refers to not include carboxylic monomer substantially, except completely not
Outside carboxylic monomer, also allow with will not occurring the degree that nesa coating or metal wiring etc. corrode by carboxyl
Include carboxylic monomer.Specifically, in (methyl) acrylate polymer (A), it is used as monomeric unit, it is allowed to 0.1 matter
Measure below %, carboxylic monomer is preferably included with below 0.01 mass % amount.
(methyl) acrylate polymer (A), the monomer that being preferably also included in intramolecular has ester ring type structure (contains alicyclic ring
The monomer of formula structure) it is used as the monomeric unit for constituting the copolymer.The monomer of the structure containing ester ring type, because volume is big, by making
It is present in polymer, thus it is speculated that can expand the interval between polymer, can make the excellent flexibility of resulting sticker.
Therefore, by making monomer of (methyl) acrylate polymer (A) comprising the structure containing ester ring type be used as structures alone unit, it can make
The segment difference tracing ability at initial stage of sticker is more excellent obtained from adherence composition P crosslinkings.
The carbocyclic ring of ester ring type structure in the monomer of the structure containing ester ring type, can be saturated structures, can also have in a part
Unsaturated bond.Can be monocyclic ester ring type structure in addition, ester ring type structure, or bicyclic, three rings etc. polycyclic ester ring type
Structure.Just expand obtained by (methyl) acrylate polymer (A) mutual distance, effectively play sticker it is soft
For soft viewpoint, above-mentioned ester ring type structure, preferably polycyclic ester ring type structure (multiring structure).Furthermore, it is contemplated that (first
Base) acrylate polymer (A) and other compositions intermiscibility, above-mentioned multiring structure is particularly preferably bicyclic to Fourth Ring.This
Outside, as described above, for the viewpoint for effectively playing the effect of flexibility of sticker, the carbon number of ester ring type structure
(referring to all carbon numbers of part to form ring, when multiple rings are individually present, refer to its total carbon number), generally
Preferably more than 5, particularly preferably more than 7.On the other hand, the upper limit of the carbon number of ester ring type structure, there is no particular restriction,
As described above, for the viewpoint of intermiscibility, preferably less than 15, particularly preferably less than 10.
As ester ring type structure, it can enumerate, for example, containing cyclohexyl skeleton, bicyclopentadiene skeleton, adamantane bone
Frame, isobornyl skeleton, cycloalkanes skeleton (cycloheptane skeleton, cyclooctane skeleton, cyclononane skeleton, cyclodecane skeleton, ring hendecane
Skeleton, cyclododecane skeleton etc.), cyclenes skeleton (cycloheptene skeleton, cyclo-octene skeleton etc.), ENB skeleton, norborneol two
Alkene skeleton, cubane skeleton, basket alkane skeleton, room alkane skeleton, spirocyclic ring scaffold etc., wherein, preferably comprise and play more excellent durable
Bicyclopentadiene skeleton (the carbon number of ester ring type structure of property:10), adamantane framework (the Tan Yuan Shuo ︰ of ester ring type structure
10) isobornyl skeleton or isobornyl skeleton (the Tan Yuan Shuo ︰ 7 of ester ring type structure), is particularly preferably contained.
As the monomer of the above-mentioned structure containing ester ring type, (methyl) acrylate monomer of above-mentioned skeleton is preferably comprised, specifically
For, it can enumerate, (methyl) cyclohexyl acrylate, the ring pentyl ester of (methyl) acrylic acid two, (methyl) acrylic acid Buddha's warrior attendant ester, (first
Base) isobornyl acrylate, (methyl) acrylic acid dicyclopentenyl ester, (methyl) acrylic acid dicyclopentenyl epoxide ethyl ester etc., wherein,
It is preferred that playing the ring pentyl ester of (methyl) acrylic acid two, (methyl) acrylic acid Buddha's warrior attendant ester or (methyl) acrylic acid of more excellent durability
Isobornyl thiocyanoacetate, particularly preferred (methyl) isobornyl acrylate.They can be used alone, and two or more, which also can be combined, makes
With.
(methyl) acrylate polymer (A), the monomer comprising the structure containing ester ring type is used as the monomer for constituting the polymer
During unit, (methyl) acrylate polymer (A) preferably comprises more than 5 mass %, particularly preferably contains more than 8 mass %, enters
One step preferably comprises the monomer of the structures containing ester ring type more than 10 mass %.In addition, (methyl) acrylate polymer (A), excellent
Select containing below 40 mass %, particularly preferably containing below 30 mass %, further preferably below 20 mass % and contain fat
The monomer of ring structures is used as the monomeric unit for constituting the polymer.By make the structure containing ester ring type monomer content above-mentioned
Scope, can make the segment difference tracing ability at initial stage of resulting sticker more excellent.
(methyl) acrylate polymer (A), further preferably containing the monomer in intramolecular with nitrogen-atoms (nitrogen atom
Monomer) it is used as the monomeric unit for constituting the copolymer.It is used as construction unit by there is the monomer of nitrogen atom in the polymer,
The reaction of (methyl) acrylate copolymer (A) and crosslinking agent (C) can be promoted, sticker polarity is assigned, sticker itself is improved
Cohesiveness.
As the monomer of above-mentioned nitrogen atom, it can enumerate:Monomer with tertiary amino, the monomer with amide groups, tool
There is nitrogenous heterocyclic monomer etc., wherein it is preferred that with nitrogenous heterocyclic monomer.
As with nitrogenous heterocyclic monomer, it can enumerate, for example, N- (methyl) acryloyl morpholine, N- vinyl -2-
Pyrrolidones, N- (methyl) acryloyl groups pyrrolidones, N- (methyl) acryloylpiperidine, N- (methyl) acryloyl group pyrroles
Alkane, N- (methyl) acryloylaziridine, '-aziridino ethyl (methyl) acrylate, 2- vinylpyridines, 4- vinylpyridines
Pyridine, 2- vinylpyrazines, 1- vinyl imidazoles, N- vinyl carbazoles, N- vinyl phthalimides etc., wherein, preferably
Play N- (methyl) acryloyl morpholine of more excellent adhesion strength, particularly preferred N- acryloyl morpholines.
Furthermore, it is used as the above-mentioned monomer with the nitrogen atom beyond nitrogenous heterocyclic monomer, it is possible to use, for example,
(methyl) acrylamide, N- methyl (methyl) acrylamide, N- methylols (methyl) acrylamide, the N- tert-butyl groups (methyl) propylene
Acid amides, N, N- dimethyl (methyl) acrylamide, N, N- ethyls (methyl) acrylamide, N, N- dimethylamino-propyls (methyl) third
Acrylamide, N- isopropyls (methyl) acrylamide, N- phenyl (methyl) acrylamide, dimethylamino-propyl (methyl) acryloyl
Amine, N- caprolactams, (methyl) dimethylaminoethyl acrylate etc..
The monomer of nitrogen atom above, can be used alone, and two or more also can be combined and uses.
(methyl) acrylate polymer (A), the monomer comprising nitrogen atom is used as the monomeric unit for constituting the polymer
When, (methyl) acrylate polymer (A), preferably comprise more than 1 mass %, particularly preferably containing more than 2 mass %, further
Preferably comprise the monomer of nitrogen atoms more than 5 mass %.In addition, (methyl) acrylate polymer (A), preferably comprises 40 matter
Measure below %, the particularly preferably monomer containing below 25 mass %, further preferably below 15 mass % nitrogen atom
It is used as the monomeric unit for constituting the polymer.The content of the monomer of nitrogen atom within the above range when, can effectively lift institute
The cohesiveness of obtained sticker.
(methyl) acrylate polymer (A), also can contain other monomers as constituting the polymer according to desired
Monomeric unit.As other monomers, the monomer of the functional group with reactivity is not preferably contained., can as the other monomers
Enumerate, (methyl) alkyl acrylate epoxide such as (methyl) methoxyethyl acrylate, (methyl) ethoxyethyl acrylate
Arrcostab, vinyl acetate, styrene etc..They can be used alone, and two or more also can be combined and uses.
The polymerization methodses of (methyl) acrylate polymer (A), can be random copolymer, or block copolymer.
The lower limit of the weight average molecular weight of (methyl) acrylate polymer (A) is preferably more than 100,000, particularly preferably
More than 200000, more preferably more than 300,000.The lower limit of the weight average molecular weight of (methyl) acrylate polymer (A) is upper
When stating the above, then while the film-strength of resulting sticker can be made relatively higher, be lifted at it is hot and humid under the conditions of section
Poor tracing ability.In addition, the higher limit of the weight average molecular weight of (methyl) acrylate polymer (A) is preferably less than 900,000, especially
Preferably less than 800,000, more preferably less than 700,000.The upper limit of the weight average molecular weight of (methyl) acrylate polymer (A)
Value can then make the segment difference tracing ability at initial stage of resulting sticker more excellent when above-mentioned following.Furthermore, in this manual
Weight average molecular weight, is the value that the conversion determined with gel permeation chromatography (GPC) method claims polystyrene standard.
Furthermore, in adherence composition P, (methyl) acrylate polymer (A) can be used alone, also can group
Two or more is closed to use.
(1-2) active energy ray-curable compound (B)
When adherence composition P contains active energy ray-curable compound (B), then resulting adhering agent layer, understands into
For active energy ray-curable.Furthermore, the active energy ray-curable in adhering agent layer is that have before irradiation active energy ray
There is adherence, be pasted on after adherend and lift the property of bonding force by irradiating solidification that active energy ray makes.
Here, adherence composition P, in addition to containing active energy ray-curable compound (B), also containing aftermentioned
Crosslinking agent (C) when, thus it is speculated that in resulting adhering agent layer, formed by above-mentioned (methyl) acrylate polymer (A) with
The cross-linked structure of crosslinking agent (C) formation, active energy ray-curable compound (B) is deposited under unreacted state (not polymerizeing)
It is in adhering agent layer.Then, when irradiating active energy ray to above-mentioned adhering agent layer, thus it is speculated that active energy ray-curable compound
(B) it is aggregated with one another, the active energy ray-curable compound (B) having polymerize is wound in (methyl) acrylate polymer (A)
Cross-linked structure (tridimensional network), and solidify adhering agent layer.Sticker with the higher structure, due to cohesiveness
Height, is shown of a relatively high modulus of elasticity, therefore, is made with the first adhering agent layer 21 and/or the second adhering agent layer 22 after solidification
Chased after for the segment difference of outermost double-faced pressure-sensitive adhesive sheet 2 (equivalent to double-faced pressure-sensitive adhesive sheet 2' after solidification described later) under the conditions of hot and humid
It is casual excellent.
Active energy ray-curable compound (B), as long as it can solidify by irradiating active energy ray, obtain above-mentioned effect
The compound of fruit, there is no particular restriction, monomer, oligomer or polymer, or their mixture.Wherein, it can close
Multifunctional acrylic acid of the molecular weight excellent with the intermiscibility of (methyl) acrylate polymer (A) etc. less than 1000 is enumerated suitablely
Esters monomer.
It is less than 1000 polyfunctional acrylic ester class monomer as molecular weight, can enumerates, for example, BDO two
(methyl) acrylate, 1,6-HD two (methyl) acrylate, neopentyl glycol two (methyl) acrylate, polyethylene glycol two
(methyl) acrylate, NPGA neopentyl glycol adipate two (methyl) acrylate, (first of hydroxyl trimethylace tonitric neopentyl glycol two
Base) acrylate, bicyclopentyl two (methyl) acrylate, caprolactone modification dicyclopentenyl two (methyl) acrylate, ring
Oxidative ethane modified phosphate two (methyl) acrylate, two (acrylyl oxy-ethyl) isocyanuric acid esters, (first of allylation cyclohexyl two
Base) acrylate, ethoxylated bisphenol a diacrylate, 2 officials of 9,9- double [4- (2- acryl-oyloxyethoxies) phenyl] fluorenes etc.
Can type;Trimethylolpropane tris (methyl) acrylate, dipentaerythritol three (methyl) acrylate, propionic acid were modified for two seasons penta 4
Alcohol three (methyl) acrylate, pentaerythrite three (methyl) acrylate, epoxy pronane modification trimethylolpropane tris (methyl)
Acrylate, three (acrylyl oxy-ethyl) isocyanuric acid esters, 6-caprolactone are modified three (2- (methyl) acrylyl oxy-ethyl) isocyanides
3 functional-types of urea acid esters etc.;4 functional-types of two glycerine four (methyl) acrylate, pentaerythrite four (methyl) acrylate etc.;
Propionic acid is modified 5 functional-types of dipentaerythritol five (methyl) acrylate etc.;Dipentaerythritol six (methyl) acrylate, in oneself
6 functional-types of ester modified dipentaerythritol six (methyl) acrylate etc. etc..In above-mentioned, just the segment difference of resulting sticker is chased after
For casual viewpoint, preferably (methyl) acrylate of pentaerythrite three and 6-caprolactone are modified three (2- (methyl) acryloyl-oxies
Ethyl) isocyanuric acid ester.They can be used alone, and two or more also can be combined and uses.
It is used as active energy ray-curable compound (B), it is possible to use the esters of acrylic acid of active energy ray-curable is few
Polymers.The esters of acrylic acid oligomer, preferable weight-average molecular weight is 50, less than 000.It is used as esters of acrylic acid oligomer so
Example, polyester acrylic esters can be enumerated, Epoxy Acrylates, urethane acrylate class, polyoxyalkylene acrylate esters, poly-
Butadiene acrylate class, silicon acrylate etc..
The higher limit of the weight average molecular weight of aforesaid propylene esters of gallic acid oligomer is preferably 50, less than 000, particularly preferably
Less than 40,000.In addition, the lower limit of the weight average molecular weight is preferably 1, more than 000, particularly preferably 3, more than 000.These
Esters of acrylic acid oligomer, can be used alone, also can be combined two or more use.
In addition, active energy ray-curable compound (B), it is possible to use be imported with side chain with (methyl) acryloyl group
Group acrylic polymer adduct.Acrylic polymer polymer so, can be by using (first
Base) acrylate, with intramolecular have cross-linking functional group monomer copolymer, make have and (methyl) acryloyl group and friendship
The compound of the group of connection property functional group reactionses, is reacted and is obtained with the part of the cross-linking functional group of the copolymer.
The lower limit of the weight average molecular weight of aforesaid propylene esters of gallic acid polymer adduct is preferably more than 50,000, particularly preferably
For more than 100,000.In addition, the higher limit of the weight average molecular weight is preferably less than 900,000, particularly preferably less than 500,000.
Active energy ray-curable compound (B), can be few by above-mentioned polyfunctional acrylic ester class monomer, esters of acrylic acid
1 kind is selected in polymers and acrylic polymer adduct, two or more also can be combined and uses, also can be with work in addition
Property energy line curability composition is applied in combination.
The content of active energy ray-curable compound (B) in adherence composition P, the sticker obtained by just being lifted
Cohesiveness, make it is hot and humid under the conditions of the excellent viewpoint of segment difference tracing ability for, relative to (methyl) third of 100 mass parts
Olefine acid ester polymer (A), lower limit is preferably more than 1 mass parts, more than more preferably 3 mass parts, particularly preferably 5 mass parts
More than.On the other hand, above-mentioned content, just prevents active energy ray-curable compound (B) and (methyl) acrylate polymer
(A) for the viewpoint being separated, higher limit is preferably below 50 mass parts, below more preferably 20 mass parts, further to consider
Make below the segment difference tracing ability more preferably viewpoint under the conditions of hot and humid, particularly preferably 12 mass parts.
(1-3) crosslinking agent (C)
Adherence composition P, preferably comprises crosslinking agent (C).By making adherence composition P contain crosslinking agent (C), it can make
(methyl) acrylate polymer (A) is crosslinked and forms tridimensional network, and the cohesiveness of the sticker obtained by being lifted, energy
It is enough be further lifted at it is hot and humid under the conditions of segment difference tracing ability.
As crosslinking agent (C), as long as the reaction-ity group reaction that can have with (methyl) acrylate polymer (A) is i.e.
Can, it can enumerate, for example, isocyanates crosslinking agent, epoxies crosslinking agent, amine cross-linking agent, melamine class crosslinking agent, nitrogen
Third pyridine class crosslinking agent, hydrazine crosslinking agent, aldehyde crosslinking agent, oxazoline classes crosslinking agent, metal alkoxide class crosslinking agent, metallo-chelate
Class crosslinking agent, metallic salt crosslinking agent, ammonium salt class crosslinking agent etc..(methyl) acrylate polymer (A), comprising containing hydroxyl
When monomer is as the monomeric unit for constituting the polymer, the reactive excellent isocyanates preferably used with the hydroxyl is crosslinked
Agent.In addition, (methyl) acrylate polymer (A), the monomeric unit of the composition polymer is used as comprising the monomer for containing carboxyl
When, preferably use the reactive excellent epoxies crosslinking agent with the carboxyl.Furthermore, crosslinking agent (C) can be used alone,
Or combine two or more and use.
Isocyanates crosslinking agent, at least contains polyisocyanate compounds.It is used as polyisocyanate compounds, Neng Goulie
Lift, for example, the fragrance adoption such as toluene di-isocyanate(TDI), methyl diphenylene diisocyanate, XDI is different
Cyanate;The aliphatic polymeric isocyanates such as hexamethylene diisocyanate;IPDI, hydrogenated diphenyl methane
Ester ring type PIC such as diisocyanate etc., and they biuret body, isocyanuric acid ester body, be further used as and second two
The reactant of the compound of the reactive hydrogen containing low molecule of alcohol, propane diols, neopentyl glycol, trimethylolpropane, castor oil etc. plus
Compound etc..Wherein, for the reactive viewpoint with hydroxyl, the aromatic series polyisocyanate that preferably trimethylolpropane is modified
Ester, particularly preferred trimethylolpropane modified toluene diisocyanate.
As epoxies crosslinking agent, it can enumerate, for example, 1,3- double (N, N'- diglycidyl aminomethyl) hexamethylenes,
N, N, N', N'- four glycidyl group meta-xylylenediamine, ethylene glycol diglycidylether, 1,6-HD two shrink sweet
Oily ether, trimethylolpropane diglycidyl ether, diglycidylaniline, diglycidyl amine etc..Wherein, just and carboxyl
Reactive viewpoint for, double (N, the N'- diglycidyl aminomethyl) hexamethylenes of preferably 1,3-.
The content of crosslinking agent (C) in adherence composition P, relative to (methyl) acrylic ester polymerization of 100 mass parts
Thing (A), lower limit is preferably more than 0.001 mass parts, more than particularly preferably 0.01 mass parts, more preferably 0.02 matter
Measure more than part.In addition, higher limit is preferably below 10 mass parts, and below particularly preferably 5 mass parts, more preferably 1 matter
Measure below part.
By making the content of crosslinking agent (C) in above range, the cohesiveness of resulting sticker is good, can lift gained
Segment difference tracing ability of the sticker arrived under the conditions of hot and humid.
(1-4) Photoepolymerizationinitiater initiater (D)
When making the solidification of active energy ray-curable sticker, during using ultraviolet as the active energy ray of irradiation, adhesion
Property composition P, further preferably Photoepolymerizationinitiater initiater (D).By so containing Photoepolymerizationinitiater initiater (D), it can make
Active energy ray-curable compound (B) efficiency polymerize well, in addition, can reduce by polymerization carry out solidification time and
The exposure of active energy ray.
As Photoepolymerizationinitiater initiater so (D), can enumerate, for example, styrax, benzoin methyl ether, benzoin ethyl ether,
Benzoin isopropyl ether, styrax n-butyl ether, benzoin isobutyl ether, acetophenone, dimethylamino acetophenone, 2,2- dimethoxys -2-
Phenyl acetophenone, 2,2- diethoxy -2- phenyl acetophenones, 2- hydroxy-2-methyl -1- phenyl propyl- 1- ketone, 1- hydroxy-cyclohexyls
Phenyl ketone, 2- methyl isophthalic acids-[4- (methyl thio) phenyl] -2- morpholinyls -propyl- 1- ketone, 4- (2- hydroxyl-oxethyls) phenyl -2-
(hydroxyl -2- propyl group) ketone, benzophenone, to phenyl benzophenone, 4,4'- lignocaines benzophenone, dichloro benzophenone, 2-
Tectoquinone, 2- EAQs, 2- tert-butyl groups anthraquinone, 2- amino anthraquinones, 2- methyl thioxanthones, 2- ethyls thioxanthones, 2- diurils
Ton ketone, 2,4- dimethyl thioxanthones, 2,4- diethyl thioxanthones, benzyl dimethyl ketal, acetophenone dimethyl ketal, to diformazan
Amino benzoate, oligomerization [2- hydroxy-2-methyls -1 [4- (1- methyl ethylenes) phenyl] acetone], 2,4,6- trimethylbenzenes
Formoxyl diphenyl phosphine oxide etc..They can be used alone, and two or more also can be combined and uses.
The content of Photoepolymerizationinitiater initiater (D) in adherence composition P, the active energy ray relative to 100 mass parts is consolidated
The property changed compound (B), lower limit is preferably more than 0.1 mass parts, more than particularly preferably 1 mass parts.In addition, higher limit is preferred
Below 30 mass parts, below particularly preferably 10 mass parts.
(1-5) various additives
In adherence composition P, the various additions for being typically used in acrylic compounds sticker can be added according to desired
Agent, for example, silane coupling agent, antistatic agent, tackifier, antioxidant, light stabilizer, softening agent, filler, refractive index are adjusted
Agent etc..
Furthermore, adherence composition P is represented in sticker with the state of script or with each of reacted state residual
The mixture of kind composition, the removed composition in drying process etc., for example, polymer solvent described later or retarder thinner, not
In adherence composition P.
The manufacture of (1-6) adherence composition
Adherence composition P, can be by manufacturing (methyl) acrylate polymer (A), by resulting (methyl) third
While olefine acid ester polymer (A) is mixed with active energy ray-curable compound (B), according to desired, crosslinking agent is added
(C), Photoepolymerizationinitiater initiater (D) and additive and manufacture.
(methyl) acrylate polymer (A), can by by constitute polymer monomer mixture with it is common oneself
It is polymerize by base polymerization and is manufactured.The polymerization of (methyl) acrylate polymer (A), is preferably triggered according to desired using polymerization
Agent, is carried out using solution polymerization process.As polymer solvent, it can enumerate, for example, ethyl acetate, n-butyl acetate, Sucrose Acetate
Ester, toluene, acetone, hexane, MEK etc., two or more can be also used simultaneously.
As polymerization initiator, azo compound, organic peroxide etc. can be enumerated, also can simultaneously using 2 kinds with
On.As azo compound, it can enumerate, for example, 2,2'- azobis isobutyronitriles, 2,2'- azos double (2- methylbutyronitriles),
1,1'- azos double (hexamethylene -1- nitriles), 2,2'- azos double (2,4- methyl pentane nitriles), 2,2'- azos it is double (2,4- dimethyl -
4- methoxyl-valeronitriles), dimethyl 2,2'- azos double (2 Methylpropionic acid esters), 4,4'- azos double (4- cyanopentanoic acids), 2,2'- it is even
Nitrogen double (2- hydroxymethylpropionitriles), 2,2'- azos double [2- (2- imidazoline -2- bases) propane] etc..
As organic peroxide, it can enumerate, for example, benzoyl peroxide, peroxidized t-butyl perbenzoate, isopropylbenzene
Hydrogen peroxide, di-isopropyl peroxydicarbonate, peroxy dicarbonate di-n-propyl ester, (the 2- ethyoxyl second of dicetyl peroxydicarbonate two
Base) ester, new peroxide tert-butyl caprate, the peroxidating trimethylace tonitric tert-butyl ester, peroxidating (3,5,5- trimethyl acetyls), peroxide
Change two propionyl, diacetyl peroxide etc..
Furthermore, it is poly- obtained by can adjusting by blending the chain-transferring agents such as 2 mercapto ethanol in above-mentioned polymerization process
The weight average molecular weight of compound.
Obtain after (methyl) acrylate polymer (A), by (methyl) acrylate polymer (A) solution, adding
Plus active energy ray-curable compound (B), according to desired crosslinking agent (C), Photoepolymerizationinitiater initiater (D), additive and dilute
Solvent is released, and is sufficiently mixed, the adherence composition P (coating solution) of used solvent dilution can be obtained.Furthermore, above-mentioned each
In any one of composition, during using solid-like composition, or, it can be produced when being mixed with the state not being diluted with other compositions
It is raw when separating out, it will can also be mixed with other compositions after the composition individually dissolves or dilute in retarder thinner in advance.
As above-mentioned retarder thinner, it can use, for example, the aliphatic hydrocarbon of hexane, heptane, hexamethylene etc., toluene, dimethylbenzene
Deng halogenated hydrocarbons, methanol, ethanol, propyl alcohol, butanol, the 1- methoxy-2-propanols of aromatic hydrocarbon, dichloromethane, dichloroethanes etc. etc.
Ester, the ethyl cellulose such as ketone, ethyl acetate, the butyl acetate of alcohol, acetone, MEK, 2 pentanone, isophorone, cyclohexanone etc.
Cellulose family solvent of element etc. etc..
As the concentration and viscosity of the coating solution so modulated, as long as in the scope that can be coated with, having no special limit
System, can suitably be selected according to situation.For example, being 10~60 mass % by adherence composition P concentration dilution.Furthermore,
During to coating solution, the addition of retarder thinner etc. not necessarily condition, as long as adherence composition P has can be coated with viscous
Degree, also can be without retarder thinner.Now, adherence composition P, as with the polymerization of (methyl) acrylate polymer (A)
Coating solution of the solvent directly as retarder thinner.
The manufacture of (1-7) sticker
Active energy ray-curable sticker, can better be obtained by being crosslinked adherence composition P.Adhesion
Property composition P crosslinking, usually can be carried out by heating.Furthermore, the heating can be also doubled as to dry
Reason, the drying process is to make retarder thinner etc. be volatilized from the film for the adherence composition P for being coated on desired object
When.
The heating-up temperature of heating, particularly preferably preferably 50~150 DEG C, 70~120 DEG C.In addition, the heat time,
Preferably 10 seconds~10 minutes, particularly preferably 50 seconds~2 minutes.
, also can be as needed after heating, divide into the maintenance of 1~2 week or so in normal temperature (such as 23 DEG C, 50%RH)
Period.When needing during the maintenance, then after during conserving;When being not required to during maintenance, then terminating heating
Afterwards, sticker is formed.
Pass through above-mentioned heating (and maintenance), (during containing crosslinking agent (C), then via the crosslinking agent (C)) (methyl)
Acrylate polymer (A) is fully crosslinked.
(2) thickness of adhering agent layer
The thickness of the thickness of first adhering agent layer 21 and the second adhering agent layer 22, is respectively preferably more than 15 μm, especially excellent
Elect more than 30 μm, more preferably more than 50 μm as.In addition, the thickness is preferably less than 300 μm, particularly preferably 150 μm
Hereinafter, more preferably less than 100 μm.By making the thickness fall in above range, above-mentioned segment difference can be played better and is chased after
Casual and processability effect.Furthermore, the thickness of the thickness of the first adhering agent layer 21 and the second adhering agent layer 22 can be identical, also may be used
It is different.For example, for the viewpoint of segment difference tracing ability, it is sometimes preferred to be pasted on the adhering agent layer ratio of the adherend side with segment difference
Another sticker thickness.
2. intermediate layer
Intermediate layer 23, as described above, glass transition temperature is more than 0 DEG C, less than 60 DEG C.Just obtain the sight of excellent processability
For point, above-mentioned glass transition temperature, more preferably preferably more than 20 DEG C, more than 27 DEG C.On the other hand, just chase after segment difference at initial stage
For casual excellent viewpoint, above-mentioned glass transition temperature, preferably less than 50 DEG C, more preferably less than 40 DEG C, particularly preferably
Less than 30 DEG C.
Intermediate layer 23, can be active energy ray non-curable, or active energy ray-curable.But, the first adhesion
When at least one of adhering agent layer 22 of oxidant layer 21 and second is active energy ray-curable, preferred interlayer 23 is also active energy
Measure line curability.Because the adhering agent layer of active energy ray-curable and the intermediate layer of active energy ray-curable, they
Interface interreaction, and form the reason of chemical bond.Thus, the dhering strength of the adhering agent layer and intermediate layer 23 is improved, and is pressed down
Splitting processed, makes segment difference tracing ability of the double-faced pressure-sensitive adhesive sheet 2 under the conditions of hot and humid more excellent.
Furthermore, the active energy ray-curable in intermediate layer 23 is to show less elasticity before irradiation active energy ray,
It is pasted on the property for being allowed to solidify and lifted elasticity after adherend by irradiating active energy ray.
In order to obtain the intermediate layer 23 with above-mentioned glass transition temperature, the material in the intermediate layer 23 is constituted, glass is preferably comprised
Glass temperature is more than 0 DEG C, less than 60 DEG C of resin (hereinafter sometimes referred to " resin (E) ").That is, intermediate layer 23 preferably by containing
The resin combination (hereinafter sometimes referred to " resin combination Q ") of resin (E) is constituted.
(1) resin combination
(1-1) resin (E)
The glass transition temperature of contained resin (E) is 0 DEG C in material (resin combination Q) by making composition intermediate layer 23
Above, less than 60 DEG C, the glass transition temperature of itself of intermediate layer 23 easily falls within above range.For the viewpoint, resin (E)
Glass transition temperature is particularly preferably more than 20 DEG C, more preferably more than 30 DEG C.In addition, the glass transition temperature of resin (E) is special
You Xuanwei not be less than 50 DEG C, more preferably less than 40 DEG C.
As resin (E), vinyl acetate resin, vistanex etc. can be enumerated, wherein, it is preferably able to make double-sided adhesive
The particularly excellent vinyl acetate resin of the segment difference tracing ability at initial stage of piece 2.As vinyl acetate resin, except being used as acetic acid
Outside the polyvinyl acetate of the homopolymer of vinyl acetate, can enumerate vinyl acetate with can with vinyl acetate copolymerization other
The copolymer of monomer, for example, vinyl-vinyl acetate copolymer etc..
The lower limit of the weight average molecular weight of vinyl acetate resin is preferably more than 10,000, and particularly preferably more than 20,000, enter
One step is preferably more than 100,000.By make vinyl acetate resin weight average molecular weight lower limit more than above-mentioned, can be lifted
It is used as the Film making properties in intermediate layer 23, processability.In addition, the higher limit of the weight average molecular weight of vinyl acetate resin is preferably 100
Less than ten thousand, particularly preferably less than 700,000, more preferably less than 500,000.By the Weight-average molecular for making vinyl acetate resin
The higher limit of amount can more lift segment difference tracing ability above-mentioned following.
Resin combination Q, preferably using above-mentioned resin (E) as main component, specifically, preferably comprise 50 mass % with
Upper, the particularly preferred resin (E) containing more than 60 mass %, further preferably more than 80 mass %.Resin combination Q,
Also only it can be constituted with resin (E).On the other hand, resin combination Q, containing other compositions (for example, active energy ray described later
Curability compound (F) or Photoepolymerizationinitiater initiater (G)) when, preferably comprise below 95 mass %, particularly preferably contain 93 mass %
Below, further preferably below 90 mass % resin (E),.
(1-2) others composition
When intermediate layer 23 is active energy ray-curable, resin combination Q, in addition to containing above-mentioned resin (E), preferably
Contain active energy ray-curable compound (F).As active energy ray-curable compound (F), can use with can be upper
The same active energy ray of the active energy ray-curable compound (B) that is used in the active energy ray-curable sticker stated is consolidated
The property changed compound.For the viewpoint of interlayer adaptation, particularly preferably using the active energy line curing with constituting adhering agent layer
Active energy ray-curable compound (B) contained by property sticker active energy ray-curable compound of the same race, further
Preferably use and the active energy ray-curable compound contained by the active energy ray-curable sticker of composition adhering agent layer
(B) identical active energy ray-curable compound.
The content of active energy ray-curable compound (F) in resin combination Q, just makes interlayer adaptation and high temperature high
For the excellent viewpoint of segment difference tracing ability under the conditions of wet, relative to the resin (E) of 100 mass parts, lower limit is preferably 1 mass
More than part, more than particularly preferably 5 mass parts, for making the more excellent viewpoint of segment difference tracing ability at initial stage, more preferably
It is more than 10 mass parts.On the other hand, above-mentioned content, for the viewpoint that the glass transition temperature for not making intermediate layer 23 is excessively reduced,
Higher limit is preferably below 40 mass parts, below particularly preferably 30 mass parts, below more preferably 20 mass parts.
In addition, when making the resin combination Q solidifications of active energy ray-curable, the active energy using ultraviolet as irradiation
When measuring line, resin combination Q, preferably further containing Photoepolymerizationinitiater initiater (G).As Photoepolymerizationinitiater initiater (G), it can use
The same Photoepolymerizationinitiater initiater with the Photoepolymerizationinitiater initiater (D) that can be used in above-mentioned active energy ray-curable sticker.
The content of Photoepolymerizationinitiater initiater (G) in resin combination Q, relative to the active energy line curing of 100 mass parts
Property compound (F), lower limit is preferably more than 0.1 mass parts, more than particularly preferably 1 mass parts.In addition, higher limit is preferably
Below 30 mass parts, below particularly preferably 10 mass parts.
On the other hand, when resin combination Q is active energy ray non-curable, resin combination Q, except containing above-mentioned tree
Outside fat (E), preferably comprising can be with constituting (the first in the first sticker for constituting the adhering agent layer 22 of adhering agent layer 21 and second
Base) reactive functional groups (monomers for carrying out self-contained reactive functional groups) contained in acrylate polymer (A) form crosslinking knot
The cross-linkable monomer of structure, further particularly preferably contains the crosslinking agent for being used for forming the cross-linked structure.It is excellent as cross-linkable monomer
Choosing with reactive functional groups identical functional group contained in (methyl) acrylate polymer (A), for example, it is preferable to use
The monomer identical monomer containing reactive functional groups with constituting (methyl) acrylate polymer (A).In addition, being used as crosslinking
Agent, crosslinking agent (C) identical preferably used in the sticker with the first adhering agent layer 21 of composition and the second adhering agent layer 22 is handed over
Join agent.Furthermore, the sticker of the first adhering agent layer 21 and the second adhering agent layer 22 is constituted, can be active energy ray-curable adhesion
Agent, or active energy ray non-curable sticker.
In the scenario above, by for constitute the first adhering agent layer 21 and the second adhering agent layer 22 adherence composition and
During resin combination Q heat cross-linkings, then (methyl) acrylate polymer (A) and cross-linkable monomer are via above-mentioned adherence composition
In crosslinking agent (C) or the cross-linking agents in resin combination Q, and be chemically bonded.Thus, improve the first adhering agent layer 21 with
Intermediate layer 23, the second adhering agent layer 22 and the adaptation in intermediate layer 23, and can suppress in the adhering agent layer of intermediate layer 23 and first
21 and second adhering agent layer 22 interface occur splitting.
In resin combination Q, according to desired, various additives, such as antistatic agent, tackifier, antioxygen can be added
Agent, light stabilizer, softening agent, filler, refractive index adjusters etc..
Furthermore, resin combination Q is represented in the intermediate layer with the state of script or with the various of reacted state residual
The mixture of composition, the removed composition in drying process etc., for example, retarder thinner described later, is not comprised in resin group
In compound Q.
(1-3) resin combination, the manufacture in intermediate layer
Resin combination Q, can by add resin (E) and according to desired add active energy line curing
Property compound (F), Photoepolymerizationinitiater initiater (D), additive etc. and manufacture.When being coated with resin combination Q, by according to desired
And retarder thinner is added, it is utilized the resin combination Q (coating solution) of solvent dilution.
Intermediate layer 23, can be by, for example, coating resin composition Q coating solution and drying and formed.The drying,
It usually can be carried out by heating.Heating condition when the condition of heating is with above-mentioned manufacture sticker is same
Sample.
Furthermore, when intermediate layer 23 is active energy ray non-curable, resin combination Q contains active energy ray-curable
During compound (F), also it further can consolidate resin combination Q by the irradiation of active energy ray after above-mentioned coating, drying
Change, and as intermediate layer 23.But, it is considered to during segment difference tracing ability at initial stage, then preferably the display body with segment difference is constituted
After part is pasted with other display body component parts using double-faced pressure-sensitive adhesive sheet 2, active energy ray is irradiated, makes intermediate layer 23
(the resin combination Q for constituting intermediate layer 23) solidification.
(2) thickness in intermediate layer
The thickness in intermediate layer 23 is relative to the first adhering agent layer 21 and the ratio of the gross thickness of the second adhering agent layer 22, preferably
More than 0.01, particularly preferably more than 0.05, more preferably more than 0.15.In addition, this is than being preferably less than 2, it is especially excellent
Elect less than 1.5, more preferably less than 1, most preferably less than 0.5 as., can be better by making this than for more than 0.01
Play above-mentioned segment difference follow and processability effect.Furthermore, the thickness of each layer, for the value determined in accordance with JIS K7130.
The thickness in intermediate layer 23, preferably more than 5 μm, more preferably particularly preferably more than 10 μm, more than 15 μm.
In addition, the thickness is preferably less than 100 μm, particularly preferably less than 70 μm, more preferably less than 50 μm.By making the thickness
Degree fall within above range, can play better above-mentioned segment difference follow and processability effect.
3. stripping film
Stripping film 31,32, the bonding plane contacted when using for protecting double-faced pressure-sensitive adhesive sheet 2, uses two-sided adhesion
It is stripped during piece 2.In the double-faced pressure-sensitive adhesive sheet 1 of the present embodiment with stripping film, stripping film 31, one of 32 is simultaneously
It is inessential.
As stripping film 31,32, for example, polyethylene film can be used, it is polypropylene screen, polybutene film, polybutadiene film, poly-
Methylpentene film, polychloroethylene film, vinyl chloride copolymer film, polyethylene terephthalate film, poly- naphthalenedicarboxylic acid ethylene glycol
Ester film, polybutylene terephthalate (PBT) film, polyurethane film, ethylene vinyl acetate film, ionomer resin film, ethene/(first
Base) acrylic copolymer film, ethene/(methyl) acrylate copolymer film, polystyrene film, polycarbonate membrane, polyimides
Film, fluororesin film etc..In addition, it is possible to use their cross linking membrane.Further, or their stacked film.
The release surface (face particularly contacted with double-faced pressure-sensitive adhesive sheet 2) of the above-mentioned stripping film 31,32 of preferred pair is imposed at stripping
Reason.As the remover for lift-off processing, it can enumerate for example, alcohol acids, silicone, fluorine class, unsaturated polyester (UP) class, polyene
The remover of hydro carbons, wax class.Furthermore, in stripping film 31,32, a stripping film is preferably made the big re-release type of peeling force and shelled
From piece, another stripping film is made the small light exfoliated stripping film of peeling force.
On the thickness of stripping film 31,32, there is no particular restriction, but usually 20~150 μm or so.
4. physical property of adhesive sheet etc.
The gross thickness of double-faced pressure-sensitive adhesive sheet 2, preferably more than 50 μm, particularly preferably more than 100 μm, more preferably
More than 150 μm.In addition, the gross thickness, preferably less than 600 μm, more preferably particularly preferably less than 400 μm, 300 μm
Below.By making the gross thickness of double-faced pressure-sensitive adhesive sheet 2 fall within above range, above-mentioned segment difference can be played better and is followed and processability
Effect.
The lower limit of the Young's modulus of double-faced pressure-sensitive adhesive sheet 2 is preferably more than 0.01Mpa, particularly preferably more than 0.5Mpa,
More preferably more than 5MPa.When Young's modulus is more than above-mentioned lower limit, the film-strength of double-faced pressure-sensitive adhesive sheet 2 can be made high, and
Make the processability of the double-faced pressure-sensitive adhesive sheet 1 with stripping film better.In addition, the higher limit of above-mentioned Young's modulus is preferably 100Mpa
Hereinafter, particularly preferably below 50Mpa, more preferably below 20Mpa., can when Young's modulus is below above-mentioned higher limit
Make the flexibility of double-faced pressure-sensitive adhesive sheet 2 good, make the segment difference tracing ability at the initial stage of double-faced pressure-sensitive adhesive sheet 2 more excellent.Furthermore, the Young mould
The assay method of amount, shown in test example as be described hereinafter.
5. the manufacture of double-faced pressure-sensitive adhesive sheet
As a Production Example of the double-faced pressure-sensitive adhesive sheet 1 with stripping film, in the release surface of a stripping film 31, coating
Adherence composition P coating fluid is stated, carrying out heating makes adherence composition P heat cross-linkings, forms coating layer, is carried
The stripping film 31 of adherence composition P coating layer.In addition, in the release surface of another stripping film 32, being coated with above-mentioned adherence
Composition P coating fluid, carrying out heating makes adherence composition P heat cross-linkings, forms coating layer, obtains carrying adherence group
The stripping film 32 of compound P coating layer.Further, by the peel ply in other stripping films, it is coated with above-mentioned resin combination Q
Coating fluid and drying, to obtain the stripping film with intermediate layer 23.
Then, by the stripping film 31 of the coating layer with adhesion agent composition P and the stripping film with intermediate layer 23, so that
The mode contacted with each other for two layers is pasted, and stripping film is peeled off from intermediate layer 23.Then, the intermediate layer 23 is combined with adherence
The stripping film 32 of thing P coating layer, is pasted in the way of making two layers to contact with each other.When needing during maintenance, conserved by placing
Period;When being not required to during maintenance, directly an adherence composition P of above-mentioned stacking coating layer is regard as the first adhering agent layer
21, it regard another adherence composition P coating layer as the second adhering agent layer 22.Thus, obtain by the first adhering agent layer 21,
The double-faced pressure-sensitive adhesive sheet 2 that intermediate layer 23 and second adhering agent layer 22 is constituted, be stripped piece 31,32 clamping with stripping film
Double-faced pressure-sensitive adhesive sheet 1.Furthermore, the maintenance of the coating layer of adherence composition can be as described above, by the coating of adherence composition
Layer is pasted, progress after being made 3 layers, can also be carried out before stickup.
As the coating fluid and the method for resin combination Q coating fluid for being coated with above-mentioned adherence composition P, it can utilize
For example, rod coating method, scraper for coating method, rolling method, scraper plate rubbing method, die coating methods, gravure coating process etc..
Double-faced pressure-sensitive adhesive sheet 1 of the present embodiment with stripping film, because processability is good, therefore, cuts out in processing
When cutting the double-faced pressure-sensitive adhesive sheet 1 with stripping film, sticker can be suppressed section overflows and is attached to blade etc. the problem of
Occur.
[display body]
As shown in Fig. 2 display body 4 of the present embodiment, it possesses components described below and is configured:At least it is being stuck
The face of side has the first display body component parts 51 (a display body component parts) of segment difference;Second display body component parts 52
(another display body component parts);And positioned between them, the first display body component parts 51 and the second display body are constituted
The double-faced pressure-sensitive adhesive sheet 2 that part 52 is pasted mutually.In display body 4 of the present embodiment, the first display body component parts 51,
There is segment difference in the face of the side of double-faced pressure-sensitive adhesive sheet 2, specifically, with the segment difference caused by printing layer 6.
Any one in the first adhering agent layer 21, the second adhering agent layer 22 and intermediate layer 23 in double-faced pressure-sensitive adhesive sheet 2 be
During active energy ray-curable, the double-faced pressure-sensitive adhesive sheet 2 in above-mentioned display body 4, as by the above-mentioned two-sided adhesion with stripping film
The double-faced pressure-sensitive adhesive sheet 2 of piece 1, passes through double-faced pressure-sensitive adhesive sheet 2' after the solidification irradiating active energy ray and solidify.Here, so-called active energy
Line is measured, refers to that there is the active energy ray of the quanta of energy in electromagnetic wave or charged particle line, specifically, can enumerate ultraviolet
Line or electron beam etc..In active energy ray, particularly preferred maneuverable ultraviolet.
Ultraviolet irradiation, can be carried out, ultraviolet irradiation by high-pressure mercury-vapor lamp, Fusion H lamps, xenon lamp etc.
Amount, preferably illumination are 50~1000mW/cm2Left and right.In addition, light quantity is preferably 50~10000mJ/cm2, more preferably 80~
5000mJ/cm2, particularly preferably 200~2000mJ/cm2.On the other hand, the irradiation of electron beam, can pass through electron-beam accelerator
Deng progress, the preferably exposure of electron beam, 10~1000krad or so.
Irradiation to the active energy ray of double-faced pressure-sensitive adhesive sheet 2, preferably by the double-faced pressure-sensitive adhesive sheet 2 by the first display body structure
After mutually being pasted into the display body component parts 52 of part 51 and second, across the first display body component parts 51 and the second display
The part that active energy ray is can pass through among body component parts 52 is carried out.
When irradiating active energy ray to double-faced pressure-sensitive adhesive sheet 2, then the active energy ray-curable in the first adhering agent layer 21
The active energy ray in active energy ray-curable compound (B) and intermediate layer 23 in compound (B), the second adhering agent layer 22
At least one among curability compound (F) can polymerizing curable.The solidification being solidified to form by the irradiation of active energy ray
Double-faced pressure-sensitive adhesive sheet 2' afterwards, the segment difference tracing ability under hot and humid is very excellent.In addition, the first adhering agent layer 21 and the second adhesion
When at least one layer and intermediate layer 23 among oxidant layer 22 are active energy ray-curable, due to active energy ray-curable compound
(B) and active energy ray-curable compound (F) can by active energy ray irradiate interreaction and be chemically bonded, so can
The adhering agent layer of active energy ray-curable and the adaptation in intermediate layer 23 are improved, and is suppressed in the adhering agent layer and intermediate layer
Splitting occurs for 23 interface.
As display body 4, it can enumerate for example, liquid crystal (LCD) display, light emitting diode (LED) display, Organic Electricity
Photoluminescence (organic EL) display, Electronic Paper etc., or touch panel.In addition, display body 4, which is alternatively, constitutes their one
The part divided.
First display body component parts 51, in addition to glass plate, plastic plate etc., preferably by layered product comprising them etc.
The protection panels constituted.Now, printing layer 6, the side shape of double-faced pressure-sensitive adhesive sheet 2 typically in the first display body component parts 51
As frame-like.
As above-mentioned glass plate, it is not particularly limited, can enumerates for example, chemically reinforced glass, alkali-free glass, quartzy glass
Glass, soda-lime glass, baric/strontium glass, aluminum silicate glass, lead glass, pyrex, barium pyrex etc..Glass plate
Thickness, is not particularly limited, usually 0.1~5mm, preferably 0.2~2mm.
As above-mentioned plastic plate, it is not particularly limited, can enumerates such as acrylic panel, polycarbonate plate.Plastic plate
Thickness, be not particularly limited, usually 0.2~5mm, preferably 0.4~3mm.
Furthermore, in above-mentioned glass plate, the one side of plastic plate or two-sided, may also set up various functions layers (nesa coating, gold
Belong to layer, silicon dioxide layer, hard conating, antiglare layer etc.), also can laminated optical member.In addition, nesa coating and metal level also may be used
It is patterned.
Second display body component parts 52, is preferably to be pasted on the optical component of the first display body component parts 51, show
Show module (for example, liquid crystal (LCD) module, light emitting diode (LED) module, organic electroluminescent (organic EL) module etc.),
As display module a part optical component or include display module layered product.
As above-mentioned optical component, it can illustrate, for example, anti-disperse film, Polarizer (light polarizing film), polaroid, phase difference
Plate (phase retardation film), compensation film for angular field of view, luminance raising film, contrast enhancing film, liquid crystalline polymer film, diffusion barrier, half transmitting are anti-
Penetrate film, transparent and electrically conductive film etc..As the anti-film that disperses, the hard coating film that base material film one side forms hard conating can be illustrated in
Deng.
The material of printing layer 6 is constituted, is not particularly limited, the known material of usable printing.The thickness of printing layer 6
Degree, i.e. the lower limit of the height of segment difference is preferably more than 3 μm, more preferably more than 5 μm, particularly preferably more than 10 μm, optimal
Elect more than 50 μm as.By making lower limit more than above-mentioned, it can substantially ensure that from affirmant side and can't see electrical distribution etc.
It is disguised.In addition, higher limit is preferably less than 200 μm, more preferably less than 150 μm, particularly preferably less than 100 μm, enter one
Step is preferably less than 80 μm.By making higher limit above-mentioned following, the segment difference of 2 pairs of printing layers 6 of double-faced pressure-sensitive adhesive sheet can be prevented
Tracing ability is deteriorated.
On manufacturing above-mentioned display body 4, as an example, by a stripping of the double-faced pressure-sensitive adhesive sheet 1 with stripping film
Piece 31 is peeled off, the bonding plane that double-faced pressure-sensitive adhesive sheet 2 is exposed, and the printing layer 6 for being pasted onto the first display body component parts 51 is present
Side face.
Afterwards, another stripping film 32 is peeled off from the double-faced pressure-sensitive adhesive sheet 1 with stripping film, double-faced pressure-sensitive adhesive sheet 2 is exposed
Bonding plane pasted with the second display body component parts 52.In addition, as other examples, it is also replaceable by the first display body structure
Into the stickup order of the display body component parts 52 of part 51 and second.
When carrying out above-mentioned stickup, the double-faced pressure-sensitive adhesive sheet 1 with stripping film is heated, in making in double-faced pressure-sensitive adhesive sheet 2
Interbed 23 softens.Heating-up temperature, as long as the temperature that intermediate layer 23 softens, it is often preferred that more than 25 DEG C, less than 70 DEG C,
Particularly preferably more than 30 DEG C, less than 60 DEG C, more preferably more than 35 DEG C, less than 50 DEG C.It is double due to by above-mentioned heating
The overall excellent flexibility of face adhesive sheet 2, makes the segment difference tracing ability at initial stage excellent, therefore, can suppress caused by printing layer 6
Space occurs near segment difference or floats.
Then it is any in the first adhering agent layer 21, the second adhering agent layer 22 and intermediate layer 23, in double-faced pressure-sensitive adhesive sheet 2
When one is active energy ray-curable, active energy ray is irradiated to double-faced pressure-sensitive adhesive sheet 2, consolidates the layer of active energy ray-curable
Change.
In display body 4 more than, the first adhering agent layer 21, the second adhering agent layer 22 in double-faced pressure-sensitive adhesive sheet 2 and in
When at least one layer in interbed 23 is irradiated and solidified using active energy ray, double-faced pressure-sensitive adhesive sheet 2' after solidification is high even in high temperature
Under the conditions of wet, segment difference tracing ability is also excellent.Therefore, display body 4, though be placed on it is hot and humid under conditions of (for example, 85
DEG C, 85%RH, 72 hours) when, remain able to suppress near segment difference gassing, float, peel off.In addition, the first adhesion
When at least one layer and intermediate layer 23 in the adhering agent layer 22 of oxidant layer 21 and second are shone and solidified using active energy ray, it can also press down
Make and occur splitting at the interface in the adhering agent layer Yu intermediate layer 23.
The implementation described above, to be readily appreciated that described in the present invention, and be not intended to limit the present invention and
Record.Therefore, each key element disclosed in above-mentioned embodiment, to include the whole design alterations for the technical scope for belonging to the present invention
Or the purport including equivalent.
For example, any one in the stripping film 31,32 in the double-faced pressure-sensitive adhesive sheet 1 with stripping film can be omitted, in addition,
Desired optical component can be laminated to substitute stripping film 31 and/or 32.Furthermore, the first sticker in double-faced pressure-sensitive adhesive sheet 2
Between the adhering agent layer 22 of layer 21 and/or second and intermediate layer 23, other layers also may be present, first in double-faced pressure-sensitive adhesive sheet 2 is glued
The outside (stripping film 31,32 sides) of the adhering agent layer 22 of oxidant layer 21 and/or second, also can further there are other layers.
In addition, the first display body component parts 51, can also have the segment difference in addition to printing layer 6.Furthermore, more than first
Display body component parts 51, the second display body component parts 52 also can have segment difference in the side of double-faced pressure-sensitive adhesive sheet 2.
Embodiment
Hereinafter, the present invention will be further illustrated by embodiment etc., but the scope of the present invention is not limited to these realities
Apply example.
[embodiment 1]
(1) there is the making of the layered product of the first adhering agent layer or the second adhering agent layer
The modulation of (1-1) (methyl) acrylate polymer (A)
Make 2-EHA, the N- acryloyl morpholines of 5 mass parts, the acrylic acid of 15 mass parts of 65 mass parts
The acrylic acid 2- hydroxy methacrylate copolymerization of isobornyl thiocyanoacetate and 15 mass parts, modulation (methyl) acrylate polymer (A).With aftermentioned
Method determine should (methyl) acrylate polymer (A) molecular weight result, weight average molecular weight (Mw) be 500,000.
(1-2) adherence composition P modulation
(methyl) acrylate polymer (A) obtained by the above-mentioned operation (1-1) of 100 mass parts (is converted into solid
The value of body composition;It is same as below), 5 mass parts as active energy ray-curable compound (B) 6-caprolactone be modified three
(2- acrylyl oxy-ethyls) isocyanuric acid ester (chemical company of Xin Zhong villages manufactures, name of product " NK ESTER A-9300-1CL "),
(TOYO CHEM companies manufacture the toluene di-isocyanate(TDI) class crosslinking agent as crosslinking agent (C) of 0.15 mass parts, name of product
" BHS-8515 ") and 0.5 mass parts as Photoepolymerizationinitiater initiater (D) with the mass ratio mixing benzophenone of 1 ︰ 1 and 1- hydroxyls
Cyclohexyl-phenyl ketone material (BASF AG manufacture, name of product " IRGACURE 500 ") mixing, be sufficiently stirred for, utilize
MEK dilutes, and obtains adherence composition P coating solution.
The making of (1-3) layered product
By adherence composition P resulting in above-mentioned operation (1-2) coating solution, it is coated on knife type coater,
Utilize the re-release type stripping film of the one side of silicone remover lift-off processing polyethylene terephthalate film
After on the lift-off processing face of (LINTEC companies manufacture, name of product " SP-PET752150 "), 1 point is heated with 90 DEG C
Clock, forms coating layer.Then, on the coating layer, paste and utilize silicone remover lift-off processing poly terephthalic acid second two
The stripping of the light exfoliated stripping film (LINTEC companies manufacture, name of product " SP-PET382120 ") of the one side of alcohol ester film
Process face.Afterwards, by being conserved 7 days under conditions of 23 DEG C, 50%RH, obtain by the sticker of re-release type stripping film/first
The first layer stack that the structure of layer (active energy ray-curable, thick 100 μm of degree ︰)/light exfoliated stripping film is constituted.
In addition, as described above, make by the adhering agent layer of re-release type stripping film/second (active energy ray-curable,
Thick 50 μm of degree ︰)/light exfoliated stripping film the second layered product for being constituted of structure.
The thickness of above-mentioned adhering agent layer, is, in accordance with JIS K7130, to use level pressure thickness tester (TECLOCK company systems
Make, name of product " PG-02 ") determine value.
(2) making of the layered product with intermediate layer
(2-1) resin combination Q modulation
Using polyvinyl acetate (VAc, weight average molecular weight (Mw) as resin (E) of 100 mass parts:20000, Tg ︰ 32
DEG C), 10 mass parts as active energy ray-curable compound (F) 6-caprolactone be modified three (2- acrylyl oxy-ethyls) it is different
Cyanurate (chemical company of Xin Zhong villages manufactures, name of product " NK ESTER A-9300-1CL "), the conduct light of 1 mass parts gather
Close material (BASF AG's system with the mass ratio mixing benzophenone of 1 ︰ 1 and 1- hydroxycyclohexylphenylketones of initiator (G)
Make, and name of product " IRGACURE 500 ") mixing, it is sufficiently stirred for, is diluted using MEK, obtains resin combination Q coating
Solution.
The making of (2-2) layered product
It is and upper in addition to not conserving using the coating solution of the resin combination Q obtained by above-mentioned operation (2-1)
State adherence composition P similarly, make by re-release type stripping film/intermediate layer (active energy ray-curable, the μ of Hou Du ︰ 10
M) the 3rd layered product that the structure of/light exfoliated stripping film is constituted.
Here, above-mentioned weight average molecular weight (Mw), using gel permeation chromatography (GPC), to determine under the following conditions
The weight average molecular weight for being converted into polystyrene of (GPC measure).
<Condition determination>
GPC determines Zhuan Zhi ︰ TOSOH CORPORATION manufactures, HLC-8020
GPC posts (pass through) according to following order:TOSOH CORPORATION are manufactured
TSK guard columns HXL-H
Tsk gel GMHXL (× 2)
Tsk gel G2000HXL
Determine Rong Ji ︰ tetrahydrofurans
Determine 40 DEG C of Wen Du ︰
(3) making of the double-faced pressure-sensitive adhesive sheet with stripping film
While first layer stack obtained by from above-mentioned (1) peels off light exfoliated stripping film, the institute from above-mentioned (2)
The 3rd obtained layered product peels off light exfoliated stripping film, makes the first adhering agent layer and side of the intermediate layer to contact with each other exposed
Formula is pasted, and re-release type stripping film is peeled off from intermediate layer.Then, the second layered product resulting from above-mentioned (1) peels off light stripping
Release stripping film, makes the second adhering agent layer exposed be pasted with above-mentioned intermediate layer in the way of contacting with each other, and obtains being glued by first
The double-faced pressure-sensitive adhesive sheet that oxidant layer, intermediate layer and the second adhering agent layer are constituted, by the band of 2 re-release type stripping film clampings
There is the double-faced pressure-sensitive adhesive sheet of stripping film.
[embodiment 2]
By the combined amount of active energy ray-curable compound (F) be changed to 5 mass parts, Photoepolymerizationinitiater initiater (G) it is mixed
Resultant is changed to 0.5 mass parts, in addition, similarly to Example 1 resin composition modulation Q coating solution, and makes
3rd layered product.In addition to using the 3rd layered product, the double-faced pressure-sensitive adhesive sheet with stripping film is made similarly to Example 1.
[embodiment 3]
The thickness in intermediate layer is changed to 25 μm, in addition, made similarly to Example 1 two-sided with stripping film
Adhesive sheet.
[embodiment 4]
When forming intermediate layer, polyvinyl acetate (VAc, weight average molecular weight (Mw) of 100 mass parts are used:200000,
32 DEG C of Tg ︰) substitution 100 mass parts polyvinyl acetate (VAc, weight average molecular weight (Mw) as resin (E):20000, Tg ︰ 32
DEG C), in addition, the double-faced pressure-sensitive adhesive sheet with stripping film is made similarly to Example 3.
[embodiment 5]
The thickness in intermediate layer is changed to 50 μm, in addition, made similarly to Example 1 two-sided with stripping film
Adhesive sheet.
[embodiment 6]
Mixed active energy ray-curable compound (F) and Photoepolymerizationinitiater initiater (G), in addition, not same with embodiment 1
Sample resin composition modulation Q coating solution, and make the 3rd layered product.In addition to using the 3rd layered product, with implementation
Example 1 similarly makes the double-faced pressure-sensitive adhesive sheet with stripping film.
[embodiment 7]
By the combined amount of active energy ray-curable compound (F) be changed to 30 mass parts, Photoepolymerizationinitiater initiater (G) it is mixed
Resultant is changed to 3 mass parts, in addition, similarly to Example 1 resin composition modulation Q coating solution, and makes the 3rd
Layered product.In addition to using the 3rd layered product, the double-faced pressure-sensitive adhesive sheet with stripping film is made similarly to Example 1.
[comparative example 1]
While first layer stack obtained by from (1) of embodiment 1 peels off light exfoliated stripping film, from embodiment 1
(1) in obtained by the second layered product peel off light exfoliated stripping film, make the first adhering agent layer and the second sticker exposed
Layer is pasted in the way of contacting with each other, and the adhering agent layer being made up of the first adhering agent layer and the second adhering agent layer is obtained, by 2
The adhesive sheet of re-release type stripping film clamping.In addition to using the adhesive sheet, make similarly to Example 1 with stripping
From the double-faced pressure-sensitive adhesive sheet of piece.
[comparative example 2]
First layer stack obtained by from (1) of embodiment 1 peels off light exfoliated stripping film, in the first adhesion exposed
Oxidant layer, pastes 12 μm of the polyethylene terephthalate film (Hou Du ︰, 80 DEG C of Tg ︰ as intermediate layer).Then, from implementation
The second layered product obtained by (1) of example 1 peels off light exfoliated stripping film, makes the second adhering agent layer for exposing and above-mentioned poly- pair
PET film is pasted in the way of contacting with each other, and obtains by the first adhering agent layer, intermediate layer (terephthalic acid (TPA) second
Diol ester film) and the double-faced pressure-sensitive adhesive sheet that is constituted of the second adhering agent layer, by 2 re-release type stripping films clampings with stripping
From the double-faced pressure-sensitive adhesive sheet of piece.
[test example 1] (measure of glass transition temperature)
By the glass transition temperature (Tg) in the intermediate layer for making/use in embodiment and comparative example, differential scanning heat is utilized
Amount determining device (TA INSTRUMENTS JAPAN companies manufacture, and name of product " DSC Q2000 "), with heating/cooling speed
20 DEG C/min are measured.Show the result in table 1.
[test example 2] (measure of the Young's modulus of adhering agent layer)
The double-faced pressure-sensitive adhesive sheet that will be made in embodiment and comparative example, laminated multi-layer, to form 1000 μm or so of thickness,
Cut into 10mm × 70mm test film.Then, in accordance with JIS K7161:1994, determine the Young mould under 23 DEG C, 50%RH
Amount.Specifically, by above-mentioned test film, using universal tensile testing machine, (ORIENTEC companies manufacture, name of product
" Tensilon RTA-T-2M "), distance between fixture is set as after 20mm, stretching examination is carried out with 200mm/min speed
Test, determine the mono- Wei ︰ MPa of Young's modulus ().Show the result in table 1.
[test example 3] (evaluation of segment difference tracing ability)
In glass plate, (NSG PRECISION companies manufacture, name of product " Corning glass EAGLE XG ", length
90mm × wide 50mm × thickness 0.5mm) surface, with the long 90mm of frame-like (Wai Xing ︰ × wide 50mm, wide 5mm) screen painting is ultraviolet
Line curable ink (INK companies of empire manufacture, name of product " POS-911 ink ").Then, irradiation ultraviolet radiation (80W/cm2, gold
Belong to halide lamp 2, lamp height 15cm, 10~15 ms/min of belt speed), consolidate the above-mentioned ultraviolet curable ink after printing
Change, make the glass plate with segment difference with the segment difference (60 μm of the Gao Du ︰ of segment difference) caused by printing.
It is (thick that the double-faced pressure-sensitive adhesive sheet with stripping film obtained by from embodiment and comparative example peels off the second adhering agent layer
50 μm of degree) stripping film of side, by the adhering agent layer exposed, it is pasted on the polyethylene terephthalate with adhesive layer
(PET) film (Japan spin company manufacture, name of product " PET A4300 ", thick 100 μm of degree ︰) adhesive layer.Then, by first
The stripping film of adhering agent layer (100 μm of thickness) side is peeled off, and exposes adhering agent layer.Then, using laminating machine (FUJIPLA companies
Manufacture, name of product " LPD3214 "), in the way of the printing entire surface of adhering agent layer covering frame rack-like, by above-mentioned laminate layers
It is pressed on the above-mentioned glass plate with segment difference.Afterwards, under conditions of 50 DEG C, 0.5MPa, autoclave process 30 minutes.In the rank
Section, visually to confirm whether there is bubble in double-faced pressure-sensitive adhesive sheet (particularly near the segment difference caused by printing layer).As a result, will
Do not have alveolate situation to be evaluated as ◎ completely, situation of the bubble below 10 is evaluated as zero, the feelings by bubble more than 10
Condition is evaluated as × and the evaluation of segment difference tracing ability (initial stage).Show the result in table 1.
Then, to above-mentioned double-faced pressure-sensitive adhesive sheet, across PET film, the irradiation ultraviolet radiation under the conditions of the irradiation of following ultraviolets makes this
Double-faced pressure-sensitive adhesive sheet solidifies.
<Ultraviolet irradiates condition>
Manufactured using EYE GRAPHICS companies, UV conveyor devices
Illumination 200mW/cm2, light quantity 1000mJ/cm2
UV illumination/quantometer uses " UVPF-36 " that EYE GRAPHICS companies manufacture
By the layered product with double-faced pressure-sensitive adhesive sheet after solidification as described above, in 85 DEG C, 85%RH hot and humid condition
Under, keeping 72 hours.Afterwards, with visually confirm double-faced pressure-sensitive adhesive sheet (particularly near the segment difference caused by printing layer) whether
There is bubble.As a result, completely no bubble person is evaluated as into ◎, bubble person below 10 is evaluated as zero, and bubble is more than 10
Person is evaluated as × (evaluation of the poor tracing ability under the conditions of hot and humid).Furthermore, on the adhesive sheet of embodiment 6, though bubble is
Less than 10, but visible adhering agent layer and the splitting (Ping Jia ︰ △ in intermediate layer near segment difference).Show the result in table 1.
[test example 4] (evaluation of processability)
<A methods>
By the resulting double-faced pressure-sensitive adhesive sheet with stripping film in embodiment and comparative example, automatic cutter (reed is utilized
The manufacture of open country company of manufacture institute, and name of product " Super Cutter OSS-PN1 types N-L ") cut.This is cut into progress 10 times.With
Visually confirm the Chang Du ︰ 100mm of section (of the adhesive sheet after cutting), with following benchmark evaluation processability.Show the result in
Table 1.
◎:In 10 times, 10 equal spillings without sticker.
○:In 10 times, 5~9 spillings without sticker.
△:In 10 times, 1~4 spilling without sticker.
×:In 10 times, the spilling for having sticker 10 times.
<B methods>
The double-faced pressure-sensitive adhesive sheet with stripping film obtained by embodiment and comparative example is cut to the 100mm that grows up × wide
100mm.The double-faced pressure-sensitive adhesive sheet with stripping film after cutting, so that the stripping film court of the second adhering agent layer (50 μm of thickness) side
On mode, be placed on horizontal platform, the stripping film of the first adhering agent layer (100 μm of thickness) side be fixed on using bonding agent
This.
Then, in the way of indulging and break in width 50mm position, by knife under the blade of cutter to undermost stripping film
Front (the first adhering agent layer cut-off position).Afterwards, the stripping film on cut-off face side, only removes its list
Side.Thus, the half for obtaining surface is stripped piece covering, and the half of residual exposes the double-faced pressure-sensitive adhesive sheet of the second adhering agent layer.
Furthermore, growth 100mm × wide 100mm adhesive tape (manufacture of LINTEC companies, name of product " PET50 will be cut
(A) PL SHIN 8LK "), it is pasted on the whole of the double-faced pressure-sensitive adhesive sheet in the way of its bonding plane is contacted above-mentioned double-faced pressure-sensitive adhesive sheet
Face.In the stickup, apply sufficient pressure on adhesive tape, not make gas bubbles left in above-mentioned bonding plane and two-sided adhesion
The interface of piece.
Finally, the adhesive tape pasted is peeled from double-faced pressure-sensitive adhesive sheet.Thus, there is the part of stripping film in remained on surface
Double-faced pressure-sensitive adhesive sheet, residues in undermost stripping film;Expose the double-faced pressure-sensitive adhesive sheet of the part of the second adhering agent layer, with adhesive tape one
Rise and removed from undermost stripping film.The operation is carried out 10 times.Visually to confirm the two-sided adhesion for so carrying out and occurring
The Chang Du ︰ 100mm of section (of piece), with following benchmark evaluation processability.Show the result in table 1.
◎:In 10 times, 10 all spillings without sticker.
○:In 10 times, 5~9 spillings without sticker.
△:In 10 times, 1~4 spilling without sticker.
×:In 10 times, the spilling for having sticker 10 times.
[table 1]
As shown in Table 1, in embodiment obtained by double-faced pressure-sensitive adhesive sheet, in the early stage and it is hot and humid under the conditions of segment difference follow
While property is excellent, processability is also good.
Industrial applicibility
The double-faced pressure-sensitive adhesive sheet of the present invention, for example, can suitably be used in the protection panels with segment difference and desired display
The stickup of body component parts.
Claims (11)
1. a kind of double-faced pressure-sensitive adhesive sheet, it is characterised in that possess:
It is used as the first adhering agent layer of the outer layer of a surface side;
It is used as the second adhering agent layer of the outer layer of another surface side;And
Intermediate layer between first adhering agent layer and second adhering agent layer,
The glass transition temperature in the intermediate layer is more than 0 DEG C and is less than 60 DEG C.
2. double-faced pressure-sensitive adhesive sheet according to claim 1, it is characterised in that first adhering agent layer and the second adhering agent layer
For active energy ray-curable.
3. double-faced pressure-sensitive adhesive sheet according to claim 1, it is characterised in that the intermediate layer is active energy ray-curable.
4. double-faced pressure-sensitive adhesive sheet according to claim 3, it is characterised in that contain glass transition temperature for 0 DEG C in the intermediate layer
Above and be less than 60 DEG C of resin and active energy ray-curable composition.
5. double-faced pressure-sensitive adhesive sheet according to claim 1, it is characterised in that Young's modulus is more than 0.01MPa and is
Below 100MPa.
6. double-faced pressure-sensitive adhesive sheet according to claim 1, it is characterised in that the thickness in the intermediate layer is relative to described first
The ratio of the gross thickness of adhering agent layer and second adhering agent layer is more than 0.05 and is less than 2.
7. double-faced pressure-sensitive adhesive sheet according to claim 1, it is characterised in that the double-faced pressure-sensitive adhesive sheet be used to paste at least in quilt
Pasting the face of side has the display body component parts and another display body component parts of segment difference.
8. a kind of double-faced pressure-sensitive adhesive sheet with stripping film, it is characterised in that possess:
2 stripping films;And
It is any in the claim 1~7 clamped by the stripping film in the way of the release surface with 2 stripping films is contacted
Double-faced pressure-sensitive adhesive sheet described in one.
9. a kind of display body, it is characterised in that the display body is obtained by components described below:
At least there is a display body component parts of segment difference in the face for the side that is stuck;
Another display body component parts;And
It is that the one display body component parts and another display body component parts are mutually pasted, appoint in claim 1~7
Double-faced pressure-sensitive adhesive sheet described in meaning one.
10. a kind of display body, it is characterised in that possess:
At least there is a display body component parts of segment difference in the face for the side that is stuck;
Another display body component parts;And
Described in the Claims 2 or 3 that the one display body component parts and another display body component parts are mutually pasted
Double-faced pressure-sensitive adhesive sheet solidification solidification after double-faced pressure-sensitive adhesive sheet.
11. a kind of manufacture method of display body, it is characterised in that
Make a display body component parts and another display body component parts via the two-sided adhesion described in Claims 2 or 3
The layered product that piece is pasted;
Active energy ray is irradiated to the double-faced pressure-sensitive adhesive sheet of the layered product, solidifies the double-faced pressure-sensitive adhesive sheet.
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JP2016-057666 | 2016-03-22 | ||
JP2016057666A JP6745619B2 (en) | 2016-03-22 | 2016-03-22 | Display body and method of manufacturing display body |
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CN109825201A (en) * | 2018-12-26 | 2019-05-31 | 张家港康得新光电材料有限公司 | A kind of bonding structure and preparation method thereof |
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KR102305576B1 (en) * | 2018-10-16 | 2021-09-27 | 주식회사 엘지화학 | Multilayer adhesive film |
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Also Published As
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TWI728035B (en) | 2021-05-21 |
KR20170110006A (en) | 2017-10-10 |
CN107216821B (en) | 2024-06-25 |
JP6745619B2 (en) | 2020-08-26 |
JP2017171749A (en) | 2017-09-28 |
KR102360295B1 (en) | 2022-02-08 |
TW201802206A (en) | 2018-01-16 |
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