CN106010326A - Adhesive sheet and display - Google Patents

Adhesive sheet and display Download PDF

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Publication number
CN106010326A
CN106010326A CN201610191883.8A CN201610191883A CN106010326A CN 106010326 A CN106010326 A CN 106010326A CN 201610191883 A CN201610191883 A CN 201610191883A CN 106010326 A CN106010326 A CN 106010326A
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CN
China
Prior art keywords
agent layer
adhering agent
adhesive sheet
display body
methyl
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Pending
Application number
CN201610191883.8A
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Chinese (zh)
Inventor
高桥洋
高桥洋一
荒井隆行
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Lintec Corp
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Lintec Corp
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Publication of CN106010326A publication Critical patent/CN106010326A/en
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Classifications

    • 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
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385—Acrylic polymers
    • 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • 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
    • 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
    • C09J133/10—Homopolymers or copolymers of methacrylic 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
    • C09J7/22—Plastics; Metallised plastics
    • 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
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • 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
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • 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
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
    • 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
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/338—Applications of adhesives in processes or use of adhesives in the form of films or foils as tamper-evident tape or label
    • 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
    • C09J2301/122—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 only on one side of the carrier, e.g. single-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
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/414—Additional features of adhesives in the form of films or foils characterized by the presence of essential components presence of a copolymer
    • 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
    • C09J2433/00—Presence of (meth)acrylic polymer

Abstract

The invention provides an adhesive sheet and a display which are not liable to be subjected to adverse influence of UV light and have excellent anti-foaming performance. The adhesive sheet (1) has an adhesive layer (11) which bonds a display forming component (21) to another display forming component (22), which have section difference at least on to-be-laminated sides. The adhesive layer (11) is composed of an adhesive that is formed by thremal-crosslinking an adhesive composition including (methyl)acrylate polymer (a), a thermal-crosslinker (b) and a ultraviolet absrober (c). The adhesive layer (11) is lower than 2% in haze and is lower than 1% in light transmittance under wavelength of 360 nm.

Description

Adhesive sheet and display body
Technical field
This relates to a kind of adhesive sheet for display body component parts of fitting and uses this to glue The display body the adhering agent layer of sheet and obtain.
Background technology
In recent years, the various electronic apparatus such as mobile phone or tablet terminal possesses use display The display body (display) of body module, described display body module has liquid crystal cell, luminescence two Pole pipe (LED element), organic electroluminescent (organic EL) element etc..
In such display, the generally face side at display body module is provided with protection face Plate.It is provided with space between protection panel and display body module, in order to avoid because external force causes protection face During plate deformation, the protection panel collision display body module of deformation.
But, if there is space described above namely air layer, then exist because protection panel is with empty The reflection of the light that the refractivity of the refractivity of gas-bearing formation and air layer and display body module causes Loss becomes big, that the image quality of display declines problem.It is therefore proposed that fill with adhering agent layer The image quality of display is improved in space between protection panel and display body module.
Such as, there is following sticker disclosed in patent documentation 1 and 2, i.e. as the protection face of filling The sticker of the adhering agent layer in the space between plate and display body module, makes containing acrylic compounds tree Fat and the ultra-violet solidified tree of the alefinically unsaturated compounds containing an olefinic unsaturated group Oil/fat composition carries out the sticker of ultraviolet curing.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2013-227399 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2013-227436 publication
Summary of the invention
The technical problem to be solved in the present invention
But, the electronic apparatus possessing display described above uses the most out of doors, because of This is easily subject to irradiate from the ultraviolet of sunlight.Therefore, above-mentioned adhering agent layer exists because of purple The irradiation of outside line and deteriorate, thus produce the possibility of degradation under adhesion strength.Further, more viscous than above-mentioned Oxidant layer be positioned at the internal part of deeper position also can be by the harmful effect of ultraviolet.Such as, Sometimes the plastic foil with hard conating is there is in position more deeper than above-mentioned adhering agent layer, but because of purple The impact of outside line causes this hard conating to be peeled off from plastic foil.
As solution to the problems described above, it is considered to make in the resin combination of composition adhering agent layer Method containing UV absorbent.But, if to the ultraviolet being added with UV absorbent Hardening resin composition irradiation ultraviolet radiation, then can cause this ultraviolet to be inhaled by UV absorbent Receive.Thus, the curing reaction of ultra-violet solidified resin composition is obstructed, it is impossible to obtains and has Use and the adhering agent layer of necessary performance as display.Such as, display is in wet heat condition Under, when the protection i.e. plastic plate of panel occurs gas leakage, produce at the interface with adhering agent layer Bubble, tilt, the problem of the foaming such as stripping.
The present invention completes in view of the most above-mentioned practical situation, and its purpose is difficult to for providing one By the harmful effect of ultraviolet, and the excellent adhesive sheet of blister resistance and display body.
Solve the technological means of technical problem
To achieve these goals, first, the present invention provides a kind of adhesive sheet, described adhesive sheet Have for by an at least display body component parts of the section of having difference on the face of side to be fit Carry out, with another display body component parts, the adhering agent layer fitted, it is characterized by, described adhesion Oxidant layer is by will be containing (methyl) acrylate polymer (A), thermal cross-linking agent (B) and ultraviolet The sticker of the cohesiveness compositions heat cross-linking of light absorbers (C) is constituted, described adhesion The haze value of oxidant layer is less than 2%, and described adhering agent layer light transmittance under wavelength 360nm is Less than 1% (invention 1).
Adhering agent layer in foregoing invention (invention 1) is by by above-mentioned cohesiveness compositions heat cross-linking Sticker constitute, due to need not for solidification ultraviolet irradiate, even if therefore containing There is UV absorbent (C), the most do not exist and hindered solidification by this UV absorbent (C) Problem.Therefore, above-mentioned adhering agent layer can cure sufficiently (crosslinking), forms blister resistance Excellent adhering agent layer.Further, above-mentioned adhering agent layer contains UV absorbent (C), and ripple Light transmittance under long 360nm is the lowest, and the most above-mentioned adhering agent layer has the most excellent UV absorbing properties.Therefore, this adhering agent layer is susceptible to the bad shadow brought by ultraviolet Ring, and have excellent weather resistance.Further, display is positioned at position more deeper than above-mentioned adhering agent layer Internal part be also susceptible to purple because of the excellent ultra-violet absorption effect of above-mentioned adhering agent layer The harmful effect of outside line, and have excellent weather resistance.
In foregoing invention (invention 1), the most described UV absorbent (C) is for being selected from In the group being made up of benzophenone compound, benzotriazole compound and compound in triazine class At least one (invention 2).
In foregoing invention (invention 1,2), preferably described (methyl) acrylic ester polymerization The glass transition temperature (Tg) of thing (A) is-50～0 DEG C (inventions 3).
In foregoing invention (invention 1～3), preferably by the described ultraviolet in described adhering agent layer The content of light absorbers (C) is set to X mass %, the thickness of described adhering agent layer is set to Y μm Time, lower formula (I) sets up (invention 4).
50≤X×Y≤500……(I)
In foregoing invention (invention 1～4), preferably via CIE1976L*a*b* colourity system rule Transparent colourity b* of fixed described adhering agent layer is-2.0～2.0 (inventions 5).
In foregoing invention (invention 1～5), the section difference rate of following of the most described adhering agent layer is More than 20% (invention 6).
In foregoing invention (invention 1～6), the most described adhesive sheet possesses two panels stripping film, Described adhering agent layer in the way of the release surface with described two panels stripping film contacts by described stripping Sheet clamping (invention 7).
The second, the present invention provides a kind of display body, and it possesses: at least on the face of side to be fit One display body component parts of the section of having difference, another display body component parts and by described The adhesion that one display body component parts is fitted each other with another display body component parts described Oxidant layer, described display body is characterised by, described adhering agent layer is the (invention of described adhesive sheet 1～7) adhering agent layer (invention 8).
Invention effect
The adhesive sheet of the present invention and display body are susceptible to the harmful effect of ultraviolet, and anti-foaming Property excellent.
Accompanying drawing explanation
Fig. 1 is the sectional view of the adhesive sheet of an embodiment of the invention.
Fig. 2 is the sectional view of the laminate of an embodiment of the invention.
Description of reference numerals:
1: adhesive sheet；11: adhering agent layer；12a, 12b: stripping film；2: display body；21: 1st display body component parts；22: the 2 display body component parts；3: printing layer.
Detailed description of the invention
Hereinafter, embodiments of the present invention are illustrated.
[adhesive sheet]
The adhesive sheet of present embodiment has for by least section of having on the face of side to be fit One display body component parts of difference and another display body component parts carry out the adhesion fitted Oxidant layer.About concrete structure, display body and the display body component parts of adhesive sheet, as be described hereinafter.
The adhering agent layer of the adhesive sheet of present embodiment is by will be containing (methyl) acrylic ester polymerization The cohesiveness compositions of thing (A), thermal cross-linking agent (B) and UV absorbent (C) (with Under, it being sometimes referred to as " cohesiveness compositions P ") sticker of heat cross-linking constitutes.Further, The haze value of this adhering agent layer is less than 2%, this adhering agent layer printing opacity under wavelength 360nm Rate is less than 1%.It addition, in this manual, (methyl) acrylic acid represents acrylic acid and first Both base acrylic acid.Other similar terms also do same interpretation.Further, in " polymer " Also the concept of " copolymer " is comprised.
Above-mentioned adhering agent layer is by will be containing (methyl) acrylate polymer (A), heat cross-linking The adhesion of the cohesiveness compositions P heat cross-linking of agent (B) and UV absorbent (C) Agent is constituted, owing to the ultraviolet that need not for solidification irradiates, even if therefore inhaling containing ultraviolet Receive agent (C), the most there is not the problem being hindered solidification by this UV absorbent (C).Therefore, Above-mentioned adhering agent layer can cure sufficiently (crosslinking), thus forms excellent the gluing of blister resistance Oxidant layer.Such as, even if the display that the adhesive sheet using present embodiment obtains is placed in wet Under heat condition (such as, 80 DEG C, 85%RH), constitute from the display body being made up of plastic plate etc. When there is gas leakage in parts, it is possible to suppress the interface at adhering agent layer with display body component parts to occur Bubble, tilt, stripping etc. is bubbled.
It addition, the sticker constituting above-mentioned adhering agent layer contains UV absorbent (C), above-mentioned Adhering agent layer light transmittance under wavelength 360nm is less than 1%, and the most above-mentioned adhering agent layer has There is the most excellent UV absorbing properties.Therefore, the sticker of the adhesive sheet of present embodiment Layer is susceptible to the harmful effect of ultraviolet, has excellent weather resistance.Further, display is positioned at ratio upper State the internal part of the deeper position of adhering agent layer also because of the excellent ultraviolet of above-mentioned adhering agent layer Line absorption effect and be susceptible to the harmful effect of ultraviolet, have excellent weather resistance.Such as, than on In the case of stating the plastic foil that the existence of adhering agent layer deeper position has hard conating, even if from upper State adhering agent layer side Large Amount of Irradiated ultraviolet, also inhale because of the excellent ultraviolet of above-mentioned adhering agent layer Adduction and suppress hard conating from plastic foil peel off.It addition, hard conating is an example, except this Outside can also expect suppress ultraviolet optical material various for nesa coating and liquid crystal etc. The deterioration caused.
Further, the haze value of the sticker constituting above-mentioned adhering agent layer is less than 2%, therefore goes up The transparency stating adhering agent layer is the highest, and is suitable to optical applications (display is used).
(1) (methyl) acrylate polymer (A)
As it has been described above, the blister resistance of the adhering agent layer of the adhesive sheet of present embodiment is excellent.? This, the adhering agent layer of the adhesive sheet of present embodiment is for being fitted on the face of side to be fit tool The adhering agent layer of the display body component parts of the section of having difference.If adhering agent layer does not follow this section of difference, The most likely near section difference, adhering agent layer tilts, and therefore produces the reflection loss of light.Therefore, The above-mentioned adhering agent layer preferably section of having difference tracing ability.From blister resistance and the angle of section difference tracing ability Considering, the glass transition temperature (Tg) of (methyl) acrylate polymer (A) is preferred For-50～0 DEG C, particularly preferably-45～-10 DEG C, more preferably-40～-20 DEG C.(methyl) acrylic acid The glass transition temperature (Tg) of ester polymer (A) within the above range, then adhering agent layer Form blister resistance and the adhering agent layer of section difference tracing ability both of which excellence.It addition, (methyl) The glass transition temperature (Tg) of acrylate polymer (A) is based on as each monomer The glass transition temperature (Tg) of homopolymer, calculates via FOX formula.
(methyl) acrylate polymer (A) contains as the monomeric unit constituting this polymer There is (methyl) alkyl acrylate that carbon number is 1～20 of alkyl, it is possible to performance is good Cohesiveness.Considering from this angle, (methyl) acrylate polymer (A) is as constituting The carbon number of the alkyl that the monomeric unit of this polymer preferably comprises 50～95 mass % is (methyl) alkyl acrylate of 1～20, particularly preferably containing 60～90 mass %, more preferably Containing 70～85 mass %.If containing above-mentioned (methyl) alkyl acrylate more than 50 mass % Base ester, then (methyl) acrylate polymer (A) can play suitable cohesiveness.Separately Outward, by containing above-mentioned (methyl) alkyl acrylate below 95 mass %, then can Other appropriate monomer constituents are imported in (methyl) acrylate polymer (A).
As (methyl) alkyl acrylate that carbon number is 1～20 of alkyl, such as may be used Enumerate (methyl) acrylic acid methyl ester., (methyl) ethyl acrylate, (methyl) propyl acrylate, (methyl) n-butyl acrylate, (methyl) acrylic acid n-pentyl ester, (methyl) acrylic acid are just own Ester, (methyl) 2-EHA, (methyl) Isooctyl acrylate monomer, (methyl) third Olefin(e) acid ester in the positive last of the ten Heavenly stems, (methyl) acrylic acid dodecyl ester, (methyl) myristyl ester, (methyl) acrylic acid Petiolus Trachycarpi ester, (methyl) stearyl acrylate ester, (methyl) acrylate Ester, (methyl) isobornyl acrylate, (methyl) acrylic acid adamantane esters etc., wherein, From the point of view of improving cohesiveness further, the carbon number preferably comprising alkyl is 1～8 (methyl) acrylate.The most suitably select one or more monomer so that The glass transition temperature (Tg) of (methyl) acrylate polymer (A) is in described scope In.
It addition, as (methyl) alkyl acrylate that carbon number is 1～20 of alkyl, Preferred compositions uses the monomer more than 0 DEG C of the glass transition temperature (Tg) as homopolymer (hard Monomer) and the monomer that glass transition temperature (Tg) is less than 0 DEG C as homopolymer (soft Monomer).This is because, guarantee cohesiveness and flexibility by soft monomer, and by hard single Body improves cohesiveness such that it is able to make blister resistance and section difference tracing ability more excellent.Now, firmly Monomer is 5:95～40:60 with the mass ratio of soft monomer, particularly preferred 20:80～30:70.
As above-mentioned hard monomer, such as, can enumerate acrylic acid methyl ester. (Tg10 DEG C), metering system Acid methyl ester (Tg105 DEG C), isobornyl acrylate (Tg94 DEG C), methacrylic acid isoborneol Ester (Tg180 DEG C), acrylic acid adamantane esters (Tg115 DEG C), methacrylic acid adamantyl Ester (Tg141 DEG C) etc..These can be used alone, it is also possible to is used in combination.
In above-mentioned hard monomer, from prevent to cohesiveness and the transparency wait other characteristics cause bad From the point of view of the performance of impact and further performance hard monomer, preferably acrylic acid methyl ester., first Base acrylic acid methyl ester. and isobornyl acrylate.If further contemplating cohesiveness, then it is more highly preferred to propylene Acid methyl ester and methyl methacrylate.
As above-mentioned soft monomer, preferably enumerate have straight-chain that carbon number is 2～12 or The alkyl acrylate of the alkyl of chain.Such as can enumerate 2-EHA (Tg-70 DEG C), n-butyl acrylate (Tg-54 DEG C) etc..They can be used alone, also Can be used in combination.
(methyl) acrylate polymer (A) is excellent as the monomeric unit constituting this polymer Choosing comprises the monomer containing reactive functional groups.Come from the anti-of this monomer containing reactive functional groups Ying Xing functional group reacts with thermal cross-linking agent (B) and forms cross-linked structure (tridimensional network), Thus obtain the sticker with desired cohesiveness.
(methyl) acrylate polymer (A) is as to constitute the monomeric unit of this polymer And the monomer containing reactive functional groups contained, intramolecular can be enumerated and there is the monomer of hydroxyl (contain The monomer of hydroxyl), intramolecular has the monomer (carboxylic monomer) of carboxyl, intramolecular has The monomer (monomer containing amino) etc. of amino.Wherein, preferably with isocyanates cross-linking agent or The monomer of the reactive excellent hydroxyl of epoxies cross-linking agent and carboxylic monomer, if also examining Consider and attach to nesa coating etc., then the monomer of particularly preferred hydroxyl.
As the monomer of hydroxyl, such as, can enumerate (methyl) acrylic acid 2-hydroxy methacrylate, (first Base) acrylic acid 2-hydroxy propyl ester, (methyl) acrylic acid 3-hydroxy propyl ester, (methyl) acrylic acid 2-hydroxybutyl, (methyl) acrylic acid 3-hydroxybutyl, (methyl) acrylic acid 4-hydroxybutyl Deng (methyl) hydroxyalkyl acrylates etc..Wherein, from (methyl) acrylate obtained The reactivity with thermal cross-linking agent (B) of the hydroxyl in polymer (A) and with other monomers From the point of view of copolymerizable, preferably (methyl) acrylic acid 2-hydroxy methacrylate or (methyl) propylene Acid 4-hydroxybutyl.These can be used alone, it is also possible to is used in combination.
As carboxylic monomer, such as can enumerate acrylic acid, methacrylic acid .beta.-methylacrylic acid, The ethylenically unsaturated carboxylic acids such as maleic acid, itaconic acid, citraconic acid.Wherein, from obtained (first Base) carboxyl in acrylate polymer (A) the reactivity with thermal cross-linking agent (B) and From the point of view of the copolymerizable of other monomers, preferably acrylic acid.These can be used alone, Can also be used in combination.
As the monomer containing amino, such as, can enumerate (methyl) acrylate, (first Base) acrylic acid n-butylamino ethyl ester etc..These can be used alone, it is also possible to two or more It is applied in combination.
(methyl) acrylate polymer (A) as constitute this polymer monomeric unit, From well forming tridimensional network, and from the point of view of imparting blister resistance, preferably comprise The monomers containing reactive functional groups more than 5 mass %, more preferably contains more than 10 mass %. Further, that observes when taking out under ambient temperature and moisture after suppression is exposed to wet heat condition is white Change from the point of view of phenomenon, particularly preferably containing more than 15 mass % containing reactive functional groups Monomer.On the other hand, from the point of view of being readily available suitable cohesiveness, containing reactivity The content of the monomer of functional group is preferably below 40 mass %, below more preferably 30 mass %, Below particularly preferred 25 mass %.
(methyl) acrylate polymer (A) depends on as the monomeric unit constituting this polymer Other monomers can be contained according to needs.As other monomers, in order to not hinder containing reactive functional The effect of the monomer of group, does not preferably contain the monomer of the functional group with reactivity.As this Other monomers, such as, can enumerate (methyl) methoxyethyl acrylate, (methyl) acrylic acid Ethoxy ethyl ester etc. (methyl) alkoxyalkyl acrylate, (methyl) acrylic acid N, N-bis- Methylamino ethyl ester, (methyl) acrylic acid N, N-dimethylamino propyl ester, (methyl) acryloyl The non-crosslinkeds such as base morpholine there is (methyl) acrylate of tertiary amino, (methyl) propylene Amide, DMAA, vinyl acetate, styrene etc..These can be used alone, Can also be used in combination.
The polymerization methods of (methyl) acrylate polymer (A) can be random copolymer, It can also be block copolymer.
The preferably weight average molecular weight of (methyl) acrylate polymer (A) is 200,000～100 Ten thousand, particularly preferred 300,000～900,000, more preferably 400,000～700,000.It addition, in this specification Weight average molecular weight be measured by gel permeation chromatography (GPC) polystyrene standard conversion Value.
The weight average molecular weight of (methyl) acrylate polymer (A) is relatively low at ratio as mentioned above In the range of, thus can the more excellent sticker of the section of acquisition difference tracing ability.(if methyl) propylene The weight average molecular weight of acid ester polymer (A), more than 1,000,000, forms section difference tracing ability the most sometimes The bond layer of difference.On the other hand, if the weight average of (methyl) acrylate polymer (A) Molecular weight is more than 200,000, then sticker excellent in te pins of durability.
It addition, in cohesiveness compositions P, (methyl) acrylate polymer (A) is permissible It is used alone one, it is also possible to be used in combination.
(2) thermal cross-linking agent (B)
If cohesiveness compositions P that heating is containing thermal cross-linking agent (B), then thermal cross-linking agent (B) Make (methyl) acrylate polymer (A) cross-link, form tridimensional network.Thus, The cohesiveness of the sticker obtained is improved, and can give anti-foaming to this sticker Property.
As above-mentioned thermal cross-linking agent (B), as long as with (methyl) acrylate polymer (A) Had reactive functional groups reaction, such as can enumerate isocyanates cross-linking agent, Epoxies cross-linking agent, amine cross-linking agent, melamine class cross-linking agent, aziridines cross-linking agent, Hydrazine cross-linking agent, aldehyde crosslinking agent, azoles woods cross-linking agent, metal alkoxide class cross-linking agent, metal Chelating species cross-linking agent, metallic salt cross-linking agent, ammonium salt class cross-linking agent etc..At above-mentioned cross-linking agent In, the reactive functional groups being had when (methyl) acrylate polymer (A) is hydroxyl Time, reactive excellent isocyanates cross-linking agent with hydroxyl is preferably used, when (methyl) When the reactive functional groups that acrylate polymer (A) is had is carboxyl, be preferably used with The reactive excellent epoxies cross-linking agent of carboxyl.It addition, thermal cross-linking agent (B) can be independent Use one, it is also possible to be used in combination.
Isocyanates cross-linking agent is the material including at least polyisocyanate compounds.As poly- Isocyanate compound, such as can enumerate toluene di-isocyanate(TDI), '-diphenylmethane diisocyanate, Aromatic poly-isocyanate, the hexamethylene diisocyanates etc. such as XDI Aliphatic polymeric isocyanate, isophorone diisocyanate, hydrogenated diphenyl methane diisocyanate Deng ester ring type polyisocyanate etc. and their biuret body, isocyanuric acid ester body, it is also possible to Enumerate and the low molecule such as ethylene glycol, propylene glycol, neopentyl glycol, trimethylolpropane, Oleum Ricini The reactant of the compound containing reactive hydrogen i.e. adds adult etc..Wherein, reactive from hydroxyl Angle considers, the aromatic poly-isocyanate that preferably trimethylolpropane is modified, particularly preferred three Hydroxymethyl-propane modified toluene diisocyanate and trimethylolpropane modification phenylenedimethylidyne two Isocyanates.
As epoxies cross-linking agent, such as, can enumerate 1,3-pair (N, N '-diglycidyl amino Methyl) hexamethylene, N, N, N ', N '-four glycidyl group m-xylene diamine, ethylene glycol bisthioglycolate shrink Glycerin ether, 1,6 hexanediol diglycidylether, trimethylolpropane diglycidyl ether, two Glycidyl aniline, 2-glycidyl amine etc..
Relative to (methyl) acrylate polymer (A) 100 mass parts, preferably cohesiveness The content of the thermal cross-linking agent (B) in compositions P is 0.001～2 mass parts, particularly preferred 0.01～1 Mass parts, more preferably 0.02～0.3 mass parts.If the content of thermal cross-linking agent (B) is 0.001 More than mass parts, then can give the effect improving durability to the sticker obtained.If it is hot The content of cross-linking agent (B) is below 2 mass parts, then the degree that can make crosslinking is suitable degree, And the section difference tracing ability of obtained sticker can be guaranteed well.
(3) UV absorbent (C)
As UV absorbent (C), as long as adhering agent layer can be made at wavelength 360nm Under light transmittance and the haze value of adhering agent layer be that desired value i.e. can use, there is no especially Limit.The coloring of adhering agent layer is preferably used, and less and adhering agent layer is close to water white ultraviolet Absorbent (C).Specifically, use adhering agent layer by CIE1976L*a*b* colourity system rule Fixed transparent colourity b* is in the UV absorbent of aftermentioned scope.
As UV absorbent (C), such as can enumerate benzophenone, benzotriazole, Benzoates, benzimidazole dihydrochloride ketone, triazines, phenyl salicylate class, cyanoacrylate The compounds such as class, nickel complexation salt, can be used alone one, it is also possible to two or more combinations Use.
In above-mentioned UV absorbent (C), benzophenone compound, benzo are preferably used Triazole class compounds or compound in triazine class.These compounds and (methyl) acrylic ester polymerization The intermiscibility of thing (A) is good, therefore easily the haze value of adhering agent layer can be set to institute's phase The value hoped, and easily above-mentioned transparent colourity b* is placed in aftermentioned scope.
As benzophenone compound, such as, can enumerate preferably 2,2-dihydroxy-4-methoxyl group two Benzophenone, 2,4 dihydroxyl benzophenone, ESCALOL 567,2-hydroxyl-4- Methoxy benzophenone-5-azochlorosulfonate acid hydrate, 2-hydroxyl-4-n-octyl oxygen benzophenone etc..As Benzotriazole compound, such as, can enumerate preferred 2-(2-hydroxyl-5-tert-butyl-phenyl)-2H-benzene And triazole, octyl group-3-[3-tertiary butyl-4-hydroxy-5-(5-chloro-2H-benzotriazole-2-base] phenyl) third Acid esters, 2-ethylhexyl-3-[3-tertiary butyl-4-hydroxy-5-(5-chloro-2H-benzotriazole-2-base] phenyl) Propionic ester etc..As compound in triazine class, such as, can enumerate preferably 2, the double [2-hydroxyl-4-fourth oxygen of 4- Base phenyl]-6-(2,4-dibutoxy phenyl)-1,3-5-triazine, 2-[4,6-bis-(2,4-dimethylbenzene Base)-1,3,5-triazine-2-base]-5-octyl group epoxide phenol etc..These can be used alone one, also Can be used in combination.
The content of the UV absorbent (C) in cohesiveness compositions P is preferably below satisfied The amount of condition.That is, the content of the UV absorbent (C) in adhering agent layer is set to X matter Amount %, when the thickness of adhering agent layer is set to Y μm, preferably descends the amount that formula (I) is set up.
50≤X×Y≤500……(I)
The content of UV absorbent (C) is the amount meeting above-mentioned condition, is thus susceptible to more Effectively meet described adhering agent layer light transmittance under wavelength 360nm and haze value.
Consider from above-mentioned angle, the lower limit of the X × Y in the most above-mentioned formula (I) be 50 with On, particularly preferably more than 70.Additionally, it is preferred that the upper limit of the X × Y in above-mentioned formula (I) Value is less than 500, particularly preferred less than 400.
(4) various additives
In cohesiveness compositions P, it is possible to add as requested and be normally used for acrylic compounds adhesion The various additives of agent, such as, can add silane coupler, antistatic additive, viscosifier, resist Oxygen agent, light stabilizer, softening agent, filler, refractive index adjusters etc..
(5) preparation of cohesiveness compositions
Cohesiveness compositions P can be prepared via following manner, i.e. prepares (methyl) propylene Acid ester polymer (A), then by obtained (methyl) acrylate polymer (A), Thermal cross-linking agent (B) and UV absorbent (C) mixing, and add additive as requested.
(methyl) acrylate polymer (A) can utilize common radical polymerization Prepared by the mixture polymerization making the monomer of composition polymer.(methyl) acrylate polymer (A) polymerization, is used polymerization initiator the most as required, and is come by solution polymerization process Carry out.Such as can enumerate as polymer solvent ethyl acetate, n-butyl acetate, isobutyl acetate, Toluene, acetone, hexane, methyl ethyl ketone etc., it is also possible to and with two or more.
As polymerization initiator, azo compound, organic peroxide etc. can be enumerated, it is possible to With and with two or more.As azo compound, such as, can enumerate 2,2'-azodiisobutyronitrile, 2,2'-azo two (2-methylbutyronitrile), 1,1'-azo two (hexamethylene 1-nitrile), 2,2'-azo two (2,4- Methyl pentane nitrile), 2,2'-azo two (2,4-dimethyl-4-methoxyl-valeronitrile), dimethyl 2,2'-even Nitrogen two (2 Methylpropionic acid ester), 4,4'-azo two (4-cyanovaleric acid), 2,2'-azo two (2-hydroxymethyl Propionitrile), 2,2'-azo two [2-(2-imidazoline-2-base) propane] etc..
Benzoyl peroxide, the tertiary fourth of perbenzoic acid such as can be enumerated as organic peroxide Ester, cumyl hydroperoxide, di-isopropyl peroxydicarbonate, peroxy dicarbonate two positive third Ester, two (2-ethyoxyl) peroxy dicarbonate, new peroxide tert-butyl caprate, peroxidating spy Pentanoate, (3,5,5-trimethyl acetyl base) peroxide, two propiony peroxide, two Acetyl peroxide etc..
It addition, in above-mentioned polymerization process, by adding the chain-transferring agents such as 2 mercapto ethanol, The weight average molecular weight of obtained polymer can be regulated.
If obtaining (methyl) acrylate polymer (A), then at (methyl) acrylate The solution of polymer (A) adds thermal cross-linking agent (B), UV absorbent (C), and depends on Add retarder thinner and additive according to needs, they are sufficiently mixed, be derived from solvent dilute Cohesiveness compositions P (coating solution) released.It addition, in above-mentioned any each composition, make In the case of solid, shaped composition, or analyse when mixing other compositions under undiluted state In the case of going out, then in advance this composition can individually be dissolved or be diluted in retarder thinner after with Other compositions mix.
As above-mentioned retarder thinner, such as can use the aliphatic hydrocarbons such as hexane, heptane, hexamethylene, Halogenated hydrocarbons, methanol, the second such as the aromatic hydrocarbon such as toluene, dimethylbenzene, dichloromethane, ethlyene dichloride The alcohol such as alcohol, propanol, butanol, 1-methoxy-2-propanol, acetone, methyl ethyl ketone, 2 pentanone, Ester, the ethyl cellosolves etc. such as the ketone such as isophorone, Ketohexamethylene, ethyl acetate, butyl acetate are molten Fine agent kind solvent etc..
As the concentration/viscosity of thus prepared coating solution, as long as in the range of can being coated with , there is no particular restriction, it is possible to the most selected according to situation.Such as, it is diluted to cohesiveness The concentration of compositions P reaches 10～60 mass %.During it addition, obtain coating solution, dilute molten Not necessarily condition such as the interpolation of agent etc., as long as cohesiveness compositions P is the viscosity etc. that can be coated with, Then can be without retarder thinner.Now, cohesiveness compositions P is directly with (methyl) third The polymer solvent of olefine acid ester polymer (A) is as the coating solution of retarder thinner.
(6) preparation of sticker
After above cohesiveness compositions P being applied on desired object, pass through heat cross-linking Obtain sticker (adhering agent layer).
The heat cross-linking of cohesiveness compositions P can be carried out by heat treated.Can be by being coated with Dried after cloth cohesiveness compositions P also serves as this heat treated.Preferably the adding of heat treated Hot temperature is 50～150 DEG C, particularly preferred 70～120 DEG C.It addition, heat time heating time is preferably 10 Second～10 minutes, particularly preferred 50 seconds～2 minutes.
After carrying out heat treated, can be as required at room temperature (such as, 23 DEG C, 50%RH) The lower curing period arranging about 1～2 week.When this curing period of needs, in shape after curing period Become sticker, in the case of need not curing period, after heat treated terminates, form sticker.
By above-mentioned heat treated (and maintenance), make (methyl) via thermal cross-linking agent (B) Acrylate polymer (A) cross-links fully.There is not obstruction in the adhering agent layer so obtained The problem of solidification, and blister resistance is excellent.
(7) thickness of adhering agent layer
The preferably thickness of the adhering agent layer of the adhesive sheet of present embodiment (is based on JIS K7130 And the value measured) it is 10～1000 μm, more preferably 30～400 μm, particularly preferably 50～300 μm.It addition, adhering agent layer can be formed as a single layer, it is also possible to lamination The form of multilamellar is formed.
If the thickness of adhering agent layer is more than 10 μm, then easily play desired adhesion strength, Follow further, it is possible to guarantee that sufficient section is poor relative to common section of difference of display body component parts Property.It addition, if the thickness of adhering agent layer is below 1000 μm, then processability is good.
(8) physical property of adhering agent layer
(8-1) haze value
The haze value of the adhering agent layer of the adhesive sheet of present embodiment is less than 2% as mentioned above, Preferably less than 1.5%, particularly preferred less than 1.0%, more preferably less than 0.5%.If adhesion The haze value of oxidant layer is less than 2%, then the transparency is the highest, and is suitable to optical applications (display Body is used).This haze value can be by suitably selecting the kind of UV absorbent (C) to realize. It addition, the haze value in this specification is the value measured according to JIS K7136:2000.
(8-2) light transmittance
The adhering agent layer of the adhesive sheet of present embodiment light transmittance under wavelength 360nm is as above Described is less than 1%, preferably less than 0.8%, particularly preferred less than 0.5%.Optimal wavelength 360nm Under the lower limit of light transmittance be 0%, if but be considered as the visible light transmittance rate of optical applications, Actual is about 0.01%.If the light transmittance that adhering agent layer is under wavelength 360nm be 1% with Under, then transmission of ultraviolet rays is the least, and the most above-mentioned adhering agent layer is susceptible to ultraviolet not Good impact, has excellent weather resistance.Further, display is positioned at position more deeper than above-mentioned adhering agent layer The internal part put is not easy to the harmful effect by ultraviolet, has excellent weather resistance.It addition, this theory Light transmittance in bright book is the value not using integrating sphere to measure, and uses point as measuring equipment Light photometer.
(8-3) transparent colourity b*
The adhering agent layer of the adhesive sheet of present embodiment by CIE1976L*a*b* colourity system rule Fixed transparent colourity b* is preferably-2.0～2.0, and particularly preferably-1.5～1.5, further preferably -1.0～1.0.Within the above range, then this adhering agent layer colours transparent colourity b* of adhering agent layer Few, adapt to especially use for display.This transparent colourity b* can be by suitably selecting ultraviolet The kind of light absorbers (C) realizes.It addition, the mensuration of transparent colourity b* in this specification Method is as be described hereinafter shown in test example.
(8-4) section difference follows rate
The adhering agent layer of the adhesive sheet of present embodiment, preferably the section difference shown in following formula follow rate (%) it is more than 20%, particularly preferred 25～80%, more preferably 30～70%.
Section difference follows rate (%)={ (after regulation long duration test, maintain very close to each other and bubble ground The height (μm) of the section difference of the state being filled)/(thickness of adhering agent layer) } × 100
It addition, section difference is followed shown in the test method of rate test example as be described hereinafter.
As it has been described above, the adhering agent layer of the adhesive sheet of present embodiment is fitted in side to be fit The adhering agent layer of the display body component parts of the section of having difference on face.The section difference of adhering agent layer follows rate Within the above range, then to follow the section of display body component parts well poor for this adhering agent layer, and The tilting of adhering agent layer near section difference can be suppressed, the reflection producing light thus can be suppressed to damage Lose.The section difference rate of following of above-mentioned scope can be by suitably adjusting (methyl) acrylic ester polymerization The glass transition temperature (Tg) etc. of thing (A) realizes.
(9) concrete structure of adhesive sheet
Fig. 1 shows the concrete structure of an example of the adhesive sheet as present embodiment.
As it is shown in figure 1, the adhesive sheet 1 of an embodiment is by two panels stripping film 12a, 12b And peeled off by this two panels in the way of the release surface with this two panels stripping film 12a, 12b contacts The adhering agent layer 11 of sheet 12a, 12b clamping is constituted.It addition, stripping film in this specification Release surface refers to the face in stripping film with fissility, comprises the face and i.e. of in addition lift-off processing Make during lift-off processing displays that the face of fissility the most in addition any one.
Above-mentioned stripping film 12a, 12b protect the sheet of adhering agent layer till being up to use adhesive sheet Material, is just stripped when using adhesive sheet (adhering agent layer).In the adhesive sheet 1 of present embodiment, One or two equal non-vital in stripping film 12a, 12b.
As stripping film 12a, 12b, such as, can use polyethylene film, polypropylene screen, polybutene Film, polybutadiene film, polymethylpentene film, polychloroethylene film, vinyl chloride copolymer film, poly- Ethylene glycol terephthalate film, poly (ethylene naphthalate) film, poly terephthalic acid fourth two Alcohol ester film, polyurethane film, ethylene vinyl acetate film, ionomer resin film, ethylene-(first Base) acrylic copolymer film, ethylene-(methyl) acrylate copolymer film, polystyrene Film, polycarbonate membrane, polyimide film, fluororesin film etc..And, it is possible to use they Cross linking membrane.And, it is also possible to it is their laminated film.
The preferably release surface at above-mentioned stripping film 12a, 12b (especially contacts with adhering agent layer 11 Face) on apply lift-off processing.As the remover used in lift-off processing, such as, can lift Go out alcohol acids, silicone, fluorine class, unsaturated polyester esters, TPO, the stripping of paraffin class Agent.It addition, in stripping film 12a, 12b, preferably making one of them stripping film is that peeling force is big The exfoliated stripping film of weight, making another stripping film is the light exfoliated stripping film that peeling force is little.
Thickness for stripping film 12a, 12b is not particularly limited, usually 20～150 μm Left and right.
(10) preparation of adhesive sheet
As a preparation example of adhesive sheet 1, a stripping film 12a (or 12b) wherein Release surface on be coated with the coating fluid of above-mentioned cohesiveness compositions P, carrying out heat treated will be viscous The property compositions P heat cross-linking, thus after forming coating layer, on this coating layer overlapping another The release surface of stripping film 12b (or 12a).When needs curing period, by through curing period, Above-mentioned coating layer forms adhering agent layer 11, and when need not curing period, above-mentioned coating layer is direct Form adhering agent layer 11.Thus obtain above-mentioned adhesive sheet 1.The condition of heat treated and maintenance is such as Upper described.
As another preparation example of adhesive sheet 1, wherein in the release surface of a stripping film 12a It is coated with the coating fluid of above-mentioned cohesiveness compositions P, carries out heat treated and make cohesiveness compositions P Heat cross-linking, thus form coating layer, to obtain the stripping film 12a with coating layer.It addition, The release surface of another stripping film 12b is coated with the coating fluid of above-mentioned cohesiveness compositions P, Carry out heat treated, make cohesiveness compositions P heat cross-linking, thus form coating layer, to obtain Stripping film 12b with coating layer.Then, so that with the stripping film 12a of coating layer and band They are fitted by the mode having two coating layers of the stripping film 12b of coating layer to contact with each other.When When needing during maintenance, during maintenance, the coating layer of above-mentioned lamination forms adhering agent layer 11, when need not during maintenance, the coating layer of above-mentioned lamination directly forms adhering agent layer 11. Thus, it is thus achieved that above-mentioned adhesive sheet 1.By this preparation example, even if in adhering agent layer 11 thickness In the case of, it is also possible to stably prepare.
As the method for the coating fluid being coated with above-mentioned cohesiveness compositions P, such as available rod is coated with Cloth method, scraper (knife) rubbing method, roller rubbing method, scraper plate (blade) rubbing method, mould Tool rubbing method, gravure coating process etc..
[display body]
As in figure 2 it is shown, the display body 2 of present embodiment possesses: at least in the face of side to be fit On the section of having difference the 1st display body component parts 21 (a display body component parts), the 2nd Display body component parts 22 (another display body component parts) and between both and The adhesion that 1st display body component parts the 21 and the 2nd display body component parts 22 is fitted each other Oxidant layer 11.In the display body 2 of present embodiment, the 1st display body component parts 21 is in adhesion On the face of oxidant layer 11 side, the section of having is poor, specifically, has section based on printing layer 3 poor.
The adhering agent layer 11 that adhering agent layer 11 is above-mentioned adhesive sheet 1 of above-mentioned display body 2.
Liquid crystal (LCD) display, light emitting diode (LED) such as can be enumerated as display body 2 Display, organic electroluminescent (organic EL) display, Electronic Paper etc., it is also possible to be tactile Control panel.It addition, can also be to constitute the parts of the part in them as display body 2.
1st display body component parts 21 is in addition to glass plate, plastic plate etc., preferably by comprising The protection board that their laminate etc. are constituted.Now, generally at the 1st display body component parts Adhering agent layer 11 side in 21 forms printing layer 3 with phase frame-shaped.
As above-mentioned glass plate, it is not particularly limited, such as, can enumerate chemically reinforced glass, nothing Alkali glass, quartz glass, soda-lime glass, containing barium strontium glass, aluminosilicate glass, lead glass, Pyrex, barium pyrex etc..The thickness of glass plate is not particularly limited, but generally It is 0.1～5mm, preferably 0.2～2mm.
It is not particularly limited as above-mentioned plastic plate, such as, can enumerate acrylic panel, Merlon Plate etc..The thickness of plastic plate is not particularly limited, but usually 0.2～5mm, preferably 0.4～3mm.
Furthermore it is possible to arrange various on above-mentioned glass plate or a face of plastic plate or two faces Functional layer (nesa coating, metal level, silicon dioxide layer, hard conating, antiglare layer etc.), Can also lamination optics.It addition, nesa coating and metal level can also be patterned immediately.
Preferably the 2nd display body component parts 22 is for should attach to the 1st display body component parts 21 On optics, display body module (such as, liquid crystal (LCD) module, light emitting diode (LED) module, organic electroluminescent (organic EL) module etc.), as display body module The optics of a part or comprise the laminate of display body module.
As above-mentioned optics, such as can enumerating disperses prevent film, polarization plates (polarizing coating), Polariton, polarizer (phase retardation film), compensation film for angular field of view, brightness enhancement film, contrast Reinforcing membrane, liquid crystalline polymer film, diffusion barrier, Transflective film, transparent and electrically conductive film etc.. Prevent film as dispersing, exemplify the hard painting forming hard conating on a face of base material film Film etc..
The material constituting printing layer 3 is not particularly limited, and uses known printing material.Excellent The height of the thickness of offprint brush layer 3 i.e. section difference is 3～45 μm, particularly preferred 5～35 μm, more Add preferably 7～25 μm, most preferably 10～20 μm.
As preparing an example of above-mentioned display body 2, peel off one of them stripping of adhesive sheet 1 From sheet 12a, and the adhering agent layer 11 exposed in adhesive sheet 1 is fitted to the 1st display body structure Become on the face of printing side, layer 3 place of parts 21.Then, from the adhering agent layer of adhesive sheet 1 11 peel off another stripping film 12b, the adhering agent layer 11 and the 2nd that will expose in adhesive sheet 1 Display body component parts 22 is fitted.Further, as another example, the 1st can be replaced and show Show the coating squence of body component parts the 21 and the 2nd display body component parts 22.
In above display body 2, be such as placed under wet heat condition (such as, 80 DEG C, 85%RH), even if then from the 1st display body component parts the 21 and/or the 2nd display body constituting portion Part 22 leaks gas, and the blister resistance of adhering agent layer 11 is the most excellent, therefore can suppress in adhesion The boundary of oxidant layer the 11 and the 1st display body component parts the 21 and/or the 2nd display body component parts 22 Face produce bubble, tilt, stripping etc. is bubbled.
It addition, the adhering agent layer 11 of above-mentioned display body 2 is owing to having the most excellent ultraviolet Absorbent properties, are therefore susceptible to the harmful effect of ultraviolet, and have excellent weather resistance.Further, when When the 1st display body component parts 21 lateral display body 2 irradiation ultraviolet radiation, this ultraviolet quilt Adhering agent layer 11 absorbs, and therefore the 2nd display body component parts 22 is not easy to by ultraviolet not Good impact, has excellent weather resistance.Such as, the 2nd display body component parts 22 is at base material film When forming the hard coat film of hard conating on one face, can suppress to make because of ultraviolet hard conating from Base material film is peeled off.
Further, the section difference tracing ability of above-mentioned adhering agent layer 11 is excellent, and therefore display body 2 is such as When being placed under wet heat condition (such as, 80 DEG C, 85%RH), it is possible to suppress attached in section difference Closely produce bubble, tilt, stripping etc..
The implementation described above is easy for understanding that the present invention records, not for limiting The present invention.Therefore, objective also includes belonging to this in being each important document disclosed in above-mentioned embodiment All design alterations of the technical scope of invention and equivalent.
For example, it is possible in stripping film 12a, 12b of omitting in adhesive sheet 1 any one or Two, and, it is also possible to the desired optics of lamination replace stripping film 12a and/or 12b.It addition, the section that the 1st display body component parts 21 can also have beyond printing layer 3 is poor. And, it is not only the 1st display body component parts 21, the 2nd display body component parts 22 also may be used With poor in the adhering agent layer 11 side section of having.
[embodiment]
Hereinafter, by embodiment etc., the present invention is specifically described, but the scope of the present invention is also It is not limited to these embodiments etc..
[embodiment 1]
1. the preparation of (methyl) acrylate polymer
Make the n-butyl acrylate of 60 mass parts, the acrylic acid methyl ester. of 20 mass parts and 20 matter The acrylic acid 2-hydroxy methacrylate copolymerization of amount part, preparation (methyl) acrylate polymer (A). The molecular weight of this (methyl) acrylate polymer (A), result is measured by aftermentioned method Weight average molecular weight (Mw) is 600,000.
2. the preparation of cohesiveness compositions
By 100 mass parts (solid constituent scaled value；Acquisition in above-mentioned operation 1 the most together) (methyl) acrylate polymer (A), 0.23 mass parts as thermal cross-linking agent (B) Trimethylolpropane modified toluene diisocyanate (prepared by Toyokemu Co., Ltd., product Title " BHS8515 "), 1.7 mass parts (1.7 mass %) as UV absorbent (C) 2,2-dihydroxy-4-methoxy benzophenone (the Japan Cytec Industries of (benzophenone) Inc. prepare, name of product " Cyasorb UV24 ") mixing, and be sufficiently stirred for, utilize first Base ethyl ketone dilutes, thus obtains the cohesiveness compositions that solid component concentration is 35 mass % The coating solution of (heat cross-linked type).
3. the preparation of adhesive sheet
Utilize knife type coater the coating solution of obtained cohesiveness compositions is applied to by One face silicone remover of polyethylene terephthalate film carries out lift-off processing (prepared by LINTEC Corporation, name of product for the exfoliated stripping film of weight " SP-PET752150 ") lift-off processing face.Then, with the temperature of 90 DEG C, coating layer is entered 1 minute heat treated of row, thus form coating layer.
Then, by the coating layer on the above-mentioned exfoliated stripping film of obtained weight and by poly-terephthaldehyde One face silicone remover of acid glycol ester film carries out the light exfoliated stripping of lift-off processing From sheet (prepared by LINTEC Corporation, name of product " SP-PET382120 ") with this Light exfoliated stripping film lift-off processing face contact coating layer mode fit, 23 DEG C, Maintenance 7 days under conditions of 50%RH, thus make by the exfoliated stripping film/adhering agent layer of weight (thick Degree: 50 μm)/light exfoliated stripping film structure constitute adhesive sheet.It addition, adhering agent layer Thickness be with JIS K7130 as standard, use level pressure thickness tester (Teclock Co., Ltd. Preparation, name of product " PG-02 ") value that measures.
[embodiment 2]
By the 2-EHA of 60 mass parts, 20 mass parts methyl methacrylates and The acrylic acid 2-hydroxy methacrylate copolymerization of 20 mass parts, to prepare (methyl) acrylic ester polymerization Thing (A).The molecular weight being somebody's turn to do (methyl) acrylate polymer (A) is measured by aftermentioned method, Result weight average molecular weight (Mw) is 700,000.
Except using above-mentioned obtained (methyl) acrylate polymer (A) and making solid Constituent concentration is beyond 40 mass %, prepares cohesiveness group in the same manner as example 1 The coating solution of compound (heat cross-linked type).The coating using obtained cohesiveness compositions is molten Liquid, prepares adhesive sheet in the same manner as example 1.
[embodiment 3]
Except making the addition of UV absorbent (C) be 3.1 mass parts (3.0 mass %) In addition, the painting of cohesiveness compositions (heat cross-linked type) is prepared in the same manner as example 1 Cloth solution, and make adhesive sheet.
[embodiment 4]
Except (benzotriazole (1)) uses octyl group-3-[3-tertiary butyl-4-hydroxy-5-(the chloro-2H-of 5- Benzotriazole-2-base] phenyl) propionic ester and 2-ethylhexyl-3-[3-tertiary butyl-4-hydroxy-5-(5-chlorine -2H-benzotriazole-2-base] phenyl) mixture (the EVERLIGHT CHEMICAL of propionic ester Prepared by INDUSTRIAL CORP., name of product " EVERSORB 109 ") as ultraviolet Light absorbers (C), and to make its addition be beyond 2.0 mass parts (2.0 mass %), with Mode same as in Example 1 prepares the coating solution of cohesiveness compositions (heat cross-linked type), And make adhesive sheet.
[embodiment 5]
Except making the addition of UV absorbent (C) be 7.5 mass parts (7.0 mass %) In addition, in the way of the same as in Example 4, prepare the painting of cohesiveness compositions (heat cross-linked type) Cloth solution, and make adhesive sheet.
[embodiment 6]
Except making the addition of UV absorbent (C) be 0.6 mass parts (0.6 mass %) In addition, in the way of the same as in Example 4, prepare the painting of cohesiveness compositions (heat cross-linked type) Cloth solution.It addition, except the coating solution of the cohesiveness compositions obtained by using, and make to glue The thickness oxidant layer is beyond 175 μm, makes adhesive sheet in the same manner as example 1. It addition, this adhering agent layer is to be carried out by the adhering agent layer made in the same manner as example 1 3 amass layer by layer.
[embodiment 7]
Except using 2,4-bis-[2-hydroxyl-4-butoxy phenyl]-6-(2,4-Dibutoxy Benzene Base)-1,3-5-triazine (prepared by BASF company Ltd., name of product " TINUBIN 460 ") As UV absorbent (C) (triazines) so that it is addition is 3.1 mass parts (3.0 matter Amount %) beyond, prepare cohesiveness compositions (heat cross-linked type) in the same manner as example 1 Coating solution, and make adhesive sheet.
[embodiment 8]
Except making the addition of UV absorbent (C) be 6.4 mass parts (6.0 mass %) In addition, the painting of cohesiveness compositions (heat cross-linked type) is prepared in the same manner as example 1 Cloth solution, and make adhesive sheet.
[embodiment 9]
Except using 2-(2-hydroxyl-5-tert-butyl-phenyl)-2H-benzotriazole (BASF company Ltd. prepare, name of product " TINUVIN PS ") as UV absorbent (C) (benzo Triazole type (2)), and to make its addition be beyond 3.1 mass parts (3.0 mass %), with The mode that embodiment 1 is identical prepares the coating solution of cohesiveness compositions (heat cross-linked type), and Make adhesive sheet.
[comparative example 1]
In addition to being not added with UV absorbent (C), in the same manner as example 1 Prepare the coating solution (heat cross-linked type) of cohesiveness compositions, and make adhesive sheet.
[comparative example 2]
1. the preparation of (methyl) acrylate polymer
Make the 2-EHA of 60 mass parts, the isobornyl acrylate of 30 mass parts And 10 acrylic acid 2-hydroxy methacrylate copolymerization of mass parts, gather with preparation (methyl) acrylate Compound (A).Measured by aftermentioned method and be somebody's turn to do dividing of (methyl) acrylate polymer (A) Son amount, result weight average molecular weight (Mw) is 30,000.
2. the preparation of cohesiveness compositions
By (methyl) acrylate polymer obtained in above-mentioned operation 1 of 100 mass parts (A), the isobornyl acrylate as acrylate monomer of 60 mass parts and 60 mass parts 2-EHA and the 2,4,6-as Photoepolymerizationinitiater initiater of 0.88 mass parts (prepared by BASF company Ltd., name of product for trimethylbenzoyl-diphenyl-phosphine oxide " Lucirin TPO ") mixing, and be sufficiently stirred for, thus obtaining solid component concentration is 100 The coating solution of the cohesiveness compositions (ultraviolet hardening) of quality %.
3. the preparation of adhesive sheet
Utilize knife type coater the coating solution of obtained cohesiveness compositions is applied to by A face silicone remover in polyethylene terephthalate film carries out lift-off processing The exfoliated stripping film of weight (prepared by LINTEC Corporation, name of product " SP-PET752150 ") lift-off processing face on.Then, irradiating illumination from coating layer side is 100mW/cm2, light quantity be 50mJ/cm2Ultraviolet.
Then, the coating layer on the above-mentioned obtained exfoliated stripping film of weight is gathered benzene two with inciting somebody to action A face silicone remover in formic acid glycol ester film carries out the light stripping of lift-off processing Type stripping film (prepared by LINTEC Corporation, name of product " SP-PET382120 ") Fit in the way of coating layer by the lift-off processing face of this light exfoliated stripping film.Then, Irradiating illumination from light exfoliated stripping film side is 300mW/cm2, light quantity be 1000mJ/cm2's Ultraviolet, thus make by the exfoliated stripping film/adhering agent layer of weight (thickness: 175 μm)/light The adhesive sheet that the structure of exfoliated stripping film is constituted.
[comparative example 3]
Except the cohesiveness compositions in comparative example 2 is added 0.6 mass parts (0.6 mass %) Beyond the UV absorbent (C) (benzotriazole (1)) on ground the same as in Example 4, with The coating that the mode identical with comparative example 2 prepares cohesiveness compositions (ultraviolet hardening) is molten Liquid, and make adhesive sheet.
[comparative example 4]
Except making the addition of UV absorbent (C) be 6.4 mass parts (6.0 mass %) In addition, in the way of same as in Example 7, prepare the painting of cohesiveness compositions (heat cross-linked type) Cloth solution, and make adhesive sheet.
Here, described weight average molecular weight (Mw) is to use gel permeation chromatography (GPC), Measure under the conditions of below (GPC mensuration) with the weight average molecular weight of polystyrene conversion.
＜ condition determination ＞
GPC determinator: prepared by Tosoh Corporation, HLC-8020
GPC post (in the following order by): prepared by Tosoh Corporation
TSK guard column HXL-H
TSK gel GMHXL(×2)
TSK gel G2000HXL
Mensuration solvent: oxolane
Mensuration temperature: 40 DEG C
[test example 1]
By FOX formula, and according to as constituting (methyl) acrylate polymer (A) The glass transition temperature (Tg) of homopolymer of each monomer, calculate at embodiment and comparative example Glass transition temperature (the Tg of (methyl) acrylate polymer (A) of middle preparation；℃). Show the result in table 1.
[test example 2]
Calculate in the adhering agent layer (cohesiveness compositions) that will be formed in embodiment and comparative example The content of UV absorbent (C) be set to X mass %, the thickness of adhering agent layer is set to X × Y during Y μm.Show the result in table 1.
[test example 3] (mensuration of haze value)
The adhering agent layer of the adhesive sheet for obtaining in embodiment and comparative example, with JIS K7361-1:1997 is standard, uses haze meter (NIPPON DENSHOKU Prepared by INDUSTRIES Co., Ltd., name of product " NDH-2000 ") measure haze value (%). Show the result in table 1.
[test example 4] (mensuration of light transmittance)
The adhering agent layer of the adhesive sheet for obtaining in embodiment and comparative example, uses light splitting light (prepared by SHIMADZU CORP, name of product " UV-VIS-NIR for degree meter SPECTROPHOTOMETER UV-3600 ") measure light transmittance, and extract wavelength 360nm Under light transmittance (%).When being measured, use attached large-scale sample chamber MPC-3100, And do not use built-in integrating sphere to be measured.Show the result in table 1.
[test example 5] (mensuration of transparent colourity b*)
The adhering agent layer of the adhesive sheet for obtaining in embodiment and comparative example, uses and surveys simultaneously Light mode light splitting color difference meter (NIPPON DENSHOKU INDUSTRIES Co., Ltd. system Standby, name of product " SQ2000 ") measure by CIE1976L*a*b* colourity system regulation saturating Light colour degree b*.Show the result in table 1.
[test example 6] (evaluation of weatherability)
The 1-hydroxyl of 3 mass parts is added in the dipentaerythritol acrylate of 100 mass parts -cyclohexyl-phenyl-one (prepared by BASF company Ltd., trade name " Irgacure184 "), And become solid component concentration to be 30 mass % by dilution with toluene, thus obtain hard conating and formed Use coating fluid.
Using obtained hard conating formation coating solution to as one of them of base material film Mask has polyethylene terephthalate film (TOYOBO Co., the Ltd. system of easy bond layer Standby, trade name " A4300 ", thickness is 100 μm) easy adhesive linkage on, at 70 DEG C After being dried 1 minute in baking oven, utilize high voltage mercury lamp radiation light quantity for 300mJ/cm2Ultraviolet. Thus, it is produced on base material film there is the hard coat film of the hard conating that thickness is 5 μm.
Light exfoliated stripping film is peeled off on the adhesive sheet obtained embodiment and comparative example, and The adhering agent layer exposed is attached to the base material film side of above-mentioned hard coat film.Then, from this adhesion Oxidant layer peels off the exfoliated stripping film of weight, and the adhering agent layer exposed is attached to glass plate (prepared by Nippon Sheet Glass Co., Ltd., name of product " Corning Glass EAGLE XG ", thickness is 0.7mm) on.By so obtain by glass plate/adhering agent layer/base material film/ The laminate that hard conating is constituted is as evaluation sample.
For above-mentioned evaluation sample, use UV fade meter ((Suga Test Instruments Prepared by Co., Ltd., name of product " UV fade meter U48 ") implement atmospheric exposure test.Tool For body, irradiate the ultraviolet of 200 hours with sample from glass plate laterally evaluation.Irradiated The illumination of ultraviolet is 500W/m2(300～700nm), light quantity is 360MJ/m2。
After atmospheric exposure test terminates, Macroscopic sample, confirm that adhering agent layer is with or without outward See change and hard conating is peeled off.Further, after carrying out perusal, the attaching of hard conating is carried out Test.Specifically, hard conating is formed the 1cm of 5 × 5 lattice in length and breadth2Grid after, NICHIBAN Co., adhesive tape (cellophane prepared by Ltd. is attached on this hard conating Tape), the situation that time to confirm to peel this adhesive tape off, hard conating is peeled off from base material film.As long as confirming Have at one and peel off, be also judged to attach bad.
According to the above results, and with following standard evaluation weatherability.Show the result in table 1.
◎ ... during perusal, adhering agent layer is entirely without cosmetic variation and the stripping of hard conating, Patch test is the most out of question.
Zero ... although adhering agent layer is without cosmetic variation during perusal, but in patch test really The attaching recognizing hard conating is bad.
× ... confirm the cosmetic variation of adhering agent layer or the stripping of hard conating during perusal From.
It addition, for the adhesive sheet of comparative example 4, mist degree significantly rises, and is unsuitable for optical applications, Therefore cannot be carried out the evaluation of weatherability.
[test example 7] (evaluation of blister resistance)
A face is utilized to be provided with the nesa coating that is made up of tin-doped indium oxide (ITO) Polyethylene terephthalate film (prepared by OIKE&Co., Ltd., ito film, thickness: 125 μm) nesa coating and the propylene that is made up of polymethyl methacrylate (PMMA) (MITSUBISHI GAS CHEMICAL COMPANY, prepared by INC., ProductName for acid plate Claim " iupilon sheet MR200 ", thickness: 1mm) clamp acquisition in embodiment and comparative example The adhering agent layer of adhesive sheet, obtain laminate.
50 DEG C, obtained laminate is carried out under conditions of 0.5MPa the high pressure of 30 minutes After sterilization treatment, normal pressure, 23 DEG C, place 24 hours under the conditions of 50%RH.Then, exist 85 DEG C, preserve 72 hours under the wet heat condition of 85%RH.Then, by being visually confirmed to be adhesion There is bubble-free at oxidant layer and clung body interface, tilts or peel off, and resist according to following standard evaluation Bubble property.Show the result in table 1.
◎ ... entirely without bubble, tilt and peel off.
Zero ... only create a diameter of 0.1mm bubbles below.
× ... produce the diameter bubble more than 0.1mm, tilt or peel off.
[test example 8] mensuration of rate (the section difference follow)
At glass plate, (prepared by Nippon Sheet Glass Co., Ltd., name of product " Corning Glass EAGLE XG ", vertical 90mm × horizontal 50mm × thickness 0.5mm) surface on by purple (Teikoku Printing Inks Mfg.Co., prepared by Ltd., name of product for outside line curable ink " POS-911 ink ") silk screen printing be phase frame-shaped (profile: vertical 90mm × horizontal 50mm, Wide 5mm) so that coating thickness is each one in 5 μm, 10 μm, 15 μm and 20 μm. Then, irradiation ultraviolet radiation (80W/cm2, metal halide lamp two, a height of 15cm of lamp, Belt speed be 10～15m/ minute), so that printing above-mentioned ultraviolet curable ink solidification, from And be made through printing and the poor (height of section difference: 5 μm, 10 μm, 15 μm and 20 μm of the section of having In each one) with section difference glass plate.
Light exfoliated stripping film is peeled off from the adhesive sheet obtained embodiment and comparative example, and will The adhering agent layer exposed fits to the polyethylene terephthalate film with easy adhesive linkage (prepared by TOYOBO Co., Ltd., name of product " PET A4300 ", thickness: 100 μm) Easy following layer.Then, peel off the exfoliated stripping film of weight, and expose adhering agent layer.Then, Use laminating machine (prepared by laminator, FUJIPLAInc., name of product " LPD3214 ") In the way of adhering agent layer covers the whole printing surface of phase frame-shaped, above-mentioned laminate is laminated to respectively On glass plate with section difference, and it is used as evaluation sample.
50 DEG C, obtained evaluation sample is carried out 30 minutes under conditions of 0.5MPa After autoclave processes, normal pressure, 23 DEG C, place 24 hours under the conditions of 50%RH.Then, 85 DEG C, preserve 72 hours (long duration test) under the wet heat condition of 85%RH, then evaluate Section difference tracing ability.Section difference tracing ability is buried by adhering agent layer the most completely with print zone difference and is sentenced Disconnected, when gap and bubble etc. are observed in the interface of print zone difference with adhering agent layer, it is judged that for not Print zone can be followed poor.Here, section difference tracing ability follows rate (%) with the section difference shown in following formula Evaluate.Show the result in table 1.
Section difference follows rate (%)={ (after long duration test, maintain being covered of very close to each other and bubble The height (μm) of the section difference of the state buried)/(thickness of adhering agent layer: 50 μm) } × 100
[table 1]
As shown in Table 1, the haze value of the adhering agent layer obtained in an embodiment and transparent colourity B* is suitable to display body purposes, it addition, weatherability, blister resistance and section difference for ultraviolet chase after Casual excellence.
Industrial applicibility
The adhesive sheet of the present invention such as can be suitable for the protection board of the section of having difference with desired Display body component parts (such as, hard coat film) between laminating.

Claims (8)

1. an adhesive sheet, its have for by least on the face of side to be fit the section of having poor A display body component parts and another display body component parts carry out the sticker fitted Layer, described adhesive sheet is characterised by,
Described adhering agent layer is by will be containing (methyl) acrylate polymer (A), heat cross-linking The sticker of the cohesiveness compositions heat cross-linking of agent (B) and UV absorbent (C) Constitute,
The haze value of described adhering agent layer is less than 2%,
Described adhering agent layer light transmittance under wavelength 360nm is less than 1%.
2. adhesive sheet as claimed in claim 1, it is characterised in that
Described UV absorbent (C) is choosing free benzophenone compound, benzotriazole At least one in the group that compounds and compound in triazine class are constituted.
3. adhesive sheet as claimed in claim 1, it is characterised in that
The glass transition temperature (Tg) of described (methyl) acrylate polymer (A) is -50～0 DEG C.
4. adhesive sheet as claimed in claim 1, it is characterised in that
The content of the described UV absorbent (C) in described adhering agent layer is set to X matter Amount %, when the thickness of described adhering agent layer is set to Y μm, lower formula (I) is set up,
50≤X×Y≤500……(I)。
5. adhesive sheet as claimed in claim 1, it is characterised in that
Transparent colourity b* by CIE1976L*a*b* colourity system regulation of described adhering agent layer is -2.0～2.0.
6. adhesive sheet as claimed in claim 1, it is characterised in that
The section difference rate of following of described adhering agent layer is more than 20%.
7. adhesive sheet as claimed in claim 1, it is characterised in that
Described adhesive sheet possesses two panels stripping film,
Described adhering agent layer is described in the way of the release surface with described two panels stripping film contacts Stripping film clamps.
8. a display body, it possesses: at least on the face of side to be fit the one of the section of having difference Individual display body component parts, another display body component parts and by one display body structure Become the adhering agent layer that parts and another display body component parts described are fitted each other, described display Body is characterised by,
Described adhering agent layer is the sticker of the adhesive sheet according to any one of claim 1～7 Layer.
CN201610191883.8A 2015-03-31 2016-03-30 Adhesive sheet and display Pending CN106010326A (en)

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