CN105385370A - A surface protection film and an optical element with the surface protection film - Google Patents
A surface protection film and an optical element with the surface protection film Download PDFInfo
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- CN105385370A CN105385370A CN201510397287.0A CN201510397287A CN105385370A CN 105385370 A CN105385370 A CN 105385370A CN 201510397287 A CN201510397287 A CN 201510397287A CN 105385370 A CN105385370 A CN 105385370A
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- film
- surface protection
- stripping
- protection film
- adhesive layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Adhesive Tapes (AREA)
- Laminated Bodies (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Polarising Elements (AREA)
Abstract
The invention provides a surface protection film which can be applied to optical films with uneven surfaces, have little pollution to an attached body and have no time-dependent changes in terms of low-pollution to the attached body. The surface protection film has no time-dependent degradation in excellent anti-stripping electrostatic properties. An optical element using the surface protection film is also provided. According to the surface protection film, an adhesive layer (2) is formed on a single surface of a base material film (1) made of transparent resin, and then a stripping film (5) with a stripping agent layer (4) is attached to the adhesive layer (2). The stripping film (5) is formed by laminating the stripping agent layer (4) on a single-surface layer of a resin film (3). The stripping agent layer (4) contains a stripping agent with resin containing long-chain alkyl as main components and an antistatic agent not reacting with the stripping agent. The antistatic agent is transferred from the stripping film (5) to the surface of the adhesive layer (2) so as to reduce stripping electrostatic pressure during stripping of the adhesive layer (2) from the attached body.
Description
Technical field
The present invention relates to the surface protection film that one fits in the surface of the opticses such as Polarizer, polarizer, indicating meter lens coating (, sometimes also claiming " optical film " below).More specifically; a kind of surface protection film few to the pollution of adherend is provided, so provide without through time deterioration (there is not deterioration along with time lapse) and there is the surface protection film of excellent antistripping antistatic property and be fitted with the optics of this surface protection film.
Background technology
At present; when manufacturing, the optical film of carrying Polarizer, polarizer, indicating meter lens coating, antireflection film, hard coat film, touch panel nesa coating etc. and when employing their optical articles such as indicating meter, prevent the surface contamination in subsequent handling and scratch by the surperficial coating surface protective membrane at this optical film.In order to save the labour and time that to carry out again after effects on surface protective membrane is peeled off fitting thus improve operating efficiency, for the visual inspection of the optical film as product, directly implement under the state of surface protection film of sometimes also fitting on optical film.
In the past, in order to prevent the attachment of scar and dirt in the manufacturing process of optical articles, the one side being generally used in base material film is provided with the surface protection film of adhesive layer.Surface protection film is bonded on optical film by the adhesive layer of micro-cohesive force.Adhesive layer is set as the reason of micro-cohesive force is; during in order to the surface protection film of finishing using is removed from optical film sur-face peeling; can easily peel off, and in order to prevent binding agent from adhering to and remain in the phenomenon of (the so-called generation preventing glue residue) on the optical film as the product of adherend.
In recent years; in the production process of display panels; the stripping static voltage produced when removing due to the surface protection film fitted on optical film is peeled off; the circuit blocks such as the drive IC of the display frame for controlling liquid-crystal display can be destroyed; the orientation of liquid crystal molecule is also had to damage, although the number of packages that these phenomenons occur is few also in generation.
In addition, in order to reduce the power consumption of display panels, the driving voltage of liquid crystal material is tending towards reducing, and the voltage breakdown of drive IC is also tending towards reducing thereupon.Recently, require stripping static voltage to control in the scope of+0.7kV ~-0.7kV.
In addition, in recent years, popularizing along with 3D indicating meter (autostereoscopic display), has the situation at the surface of the optical films such as Polarizer laminating FPR (patterned retarder, FilmPatternedRetarder) film.After peeling off the surface protection film of fitting on the surface of the optical films such as Polarizer, laminating FPR film.But, the binding agent used by surface protection film when the optical film surface of Polarizer etc., static inhibitor when polluting, there is the problem being difficult to bonding FPR film.Therefore, for the surface protection film that this purposes uses, require that it is few to the pollution of adherend.
On the other hand; in some liquid crystal panel manufacturers; as the evaluation method of surface protection film to the contaminative of adherend; adopt with the following method: first the surface protection film that the optical film of Polarizer etc. is fitted is peeled off; fit again under the state being mixed into bubble; to the object heat treated under prescribed conditions after laminating again, then stripper surface protective membrane observe the surface of adherend.In this evaluation method; even if the surface contamination of adherend is micro-; if there is the difference of adherend surface contamination between the part that the binder phase of the part with surface protection film that are mixed into bubble contacts, then can remain as bubble impression (sometimes also referred to as " bubble stains ").Therefore, as the evaluation method of the contaminative to adherend surface, the evaluation method that can be strict.In recent years, even carry out the result judged with this strict evaluation method, also need the no problem surface protection film in the surface contamination aspect of adherend.
In order to prevent from as the optical film of adherend during stripper surface protective membrane because peeling off the high and defect that causes of static voltage, someone proposes a kind of surface protection film, it uses containing for reducing the adhesive layer of static inhibitor peeling off static voltage.
Such as, in patent documentation 1, disclose the surface protection film of the binding agent that a kind of use is made up of the acrylic polymers of alkyl trimethyl ammonium salt, hydroxyl, polymeric polyisocyanate.
In addition, in patent documentation 2, disclose the adhesive composition that a kind of acrylate copolymer that is less than 1.0 by ionic liquid and acid number forms and the bonding sheet class employing said composition.
In addition, in patent documentation 3, disclose a kind of adhesive composition be made up of acrylate copolymer, polyether polyols, an alkali metal salt crossed by Anion-adsorption compound treatment and the surface protection film employing said composition.
In addition, in patent documentation 4, disclose the adhesive composition that a kind of polymkeric substance that is less than 0 DEG C by ionic liquid, an alkali metal salt, second-order transition temperature forms and the surface protection film employing said composition.
In above-mentioned patent documentation 1 ~ 4, be added with static inhibitor in adhesive layer inside.But the thickness of adhesive layer is thicker, and along with the time lapse after fitting in adherend, the amount of the adherend movement that static inhibitor is fitted from adhesive layer to surface protection film can be more.If static inhibitor is more to the amount of adherend movement, then there is the possibility that appearance reduces or FPR film cementability reduces when fitting FPR film as the optical film of adherend.
If reduce static inhibitor to reduce binding agent to this rheological parameters' change with time of adherend movement thickness from adhesive layer, then other problem can be produced.Such as; when Polarizer for being applied with anti-dazzle process in order to anti-glare etc. on the surface tool irregular optical film time; there are the following problems in meeting: binding agent cannot be followed the concavo-convex of optical film surface and be mixed into bubble; or; because the bond area of optical film and binding agent reduces and makes cohesive force reduce, and in use surface protection film floats or peels off.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2005-131957 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2005-330464 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2005-314476 publication
Patent documentation 4: Japanese Unexamined Patent Publication 2006-152235 publication
Summary of the invention
The problem that invention will solve
The present invention completes in view of the foregoing; its problem is; there is provided the irregular optical film of a kind of effects on surface tool also can use and to the pollution of adherend less, surface protection film that the low stain of adherend do not changed along with time lapse; and have without through time deterioration (there is not deterioration along with time lapse) the surface protection film of excellent antistripping antistatic property, and employ the optics of this surface protection film.
Solve the method for problem
The present inventor etc. study intensively this problem.
In order to reduce the pollution of adherend and the rheological parameters' change with time of also decreasing pollution, need to reduce the amount by inferring the static inhibitor that adherend pollutes.But, when reducing the amount of static inhibitor, stripping static voltage during stripper surface protective membrane adherend can be caused to uprise.The present inventor etc. have studied the method for stripping static voltage when to suppress stripper surface protective membrane adherend lower when not increasing the absolute magnitude of static inhibitor.
It found that; do not add static inhibitor in a binder and carry out mixing and forming adhesive layer; but coating does not comprise the adhesive composition of static inhibitor and carries out drying and laminating adhesive layer; then to fit in the mode making adhesive layer contact with peeling agent layer the stripping film of the peeling agent layer had containing static inhibitor; shift appropriate antistatic composition from stripping film side and give the surface of adhesive layer; thereby is achieved the surface protection film of the carried charge that can suppress when peeling off, and complete the present invention based on above-mentioned discovery.
Namely, the invention provides a kind of surface protection film, it is formed with adhesive layer on the one side of the base material film be made up of the resin with the transparency, and the surface protection film of the stripping film with peeling agent layer of having fitted on this adhesive layer, wherein, this stripping film is that stacked peeling agent layer forms on the one side of resin molding, the static inhibitor that aforementioned peeling agent layer comprises the stripper using the resin containing chain alkyl as main component and do not react with this stripper, foregoing antistatic agents composition shifts from aforementioned stripping film to the surface of aforementioned adhesive layer, reduce stripping static voltage when being peeled off from adherend by foregoing adhesives layer thus.
In addition, preferred foregoing antistatic agents is an alkali metal salt.
In addition, preferred foregoing adhesives layer (methyl) acrylate copolymer is cross-linked form.
In addition ,+0.7kV ~-0.7kV is preferably from as the surface potential the optical film of adherend during stripper surface protective membrane.
In addition, peeling force when preferred aforementioned stripping film peels from aforementioned adhesive layer is 0.005 ~ 0.3N/50mm.
In addition, the invention provides a kind of optics, it is fitted with above-mentioned surface protection film.
Invention effect
The pollution of surface protection film of the present invention to adherend is few, and to the low stain of adherend without rheological parameters' change with time (can not change along with time lapse).In addition, based on the present invention, also can use even if adherend is the irregular optical films of surperficial tool such as AG Polarizer.In addition; based on surface protection film of the present invention; can provide a kind of can suppress from as the stripping static voltage that the optical film of adherend occurs during stripper surface protective membrane lower, and have without through time deterioration and the surface protection film of excellent antistripping antistatic property and use the optics of this surface protection film.
Based on surface protection film of the present invention, optical film surface reliably can be protected, therefore, it is possible to realize the raising of production efficiency and the raising of yield rate.
Accompanying drawing explanation
Fig. 1 is the sectional view of the concept representing surface protection film of the present invention.
Fig. 2 is the sectional view representing the state peeling stripping film from surface protection film of the present invention.
Fig. 3 is the sectional view of the embodiment representing optics of the present invention.
The explanation of Reference numeral
1 ... base material film; 2 ... adhesive layer; 3 ... resin molding; 4 ... peeling agent layer;
5 ... stripping film; 7 ... static inhibitor; 8 ... adherend (optics);
10 ... surface protection film; 11 ... peel the surface protection film of stripping film;
20 ... to fit the optics of surface protection film.
Embodiment
Below, the present invention is described in detail based on embodiment.
Fig. 1 is the sectional view of the concept representing surface protection film of the present invention.This surface protection film 10 is formed with adhesive layer 2 on the surface of the one side of transparent substrate film 1.The surface of this adhesive layer 2 is fitted with stripping film 5, and this stripping film 5 forms peeling agent layer 4 to form on the surface of resin molding 3.
As the base material film 1 used in surface protection film 10 of the present invention, use the base material film be made up of the resin with the transparency and flexibility.Thereby, it is possible to surface protection film to be fitted in the visual inspection implementing optics under the state of the optics of adherend.As the film be made up of the resin with the transparency of base material film 1, preferably use the polyester films such as polyethylene terephthalate, PEN, polyethylene glycol isophthalate (polyethyleneisophthalate), polybutylene terephthalate.As long as there is desirable strength as this base material film and there is optics adaptability, except polyester film, also can use the film be made up of other resin.Base material film 1 both can be unstretching film, also can be subjected to uniaxial extension or biaxial stretch-formed film.In addition, also the axial orientation angles formed along with crystallization of the stretching ratio of stretched film, stretched film can be controlled at particular value.
For the thickness of the base material film 1 used in surface protection film 10 of the present invention, be not particularly limited, such as, be preferably the thickness of about 12 ~ 100 μm; If the thickness of about 20 ~ 50 μm then easy handling, therefore more preferably.
In addition, as required, can base material film 1 be formed on the face of opposition side, face of adhesive layer 2, arrange for preventing the stain-proofing layer of surface contamination, antistatic layer, preventing the hard coat etc. of scratch.In addition, on the surface of base material film 1, the surface modification also can implementing to carry out based on corona discharge, silane coupling agent the easy bondingization process such as to smear.
In addition; for the adhesive layer 2 used in surface protection film 10 of the present invention; as long as carry out on the surface of adherend bonding, finish using after can peel simply and be difficult to pollute the adhesive layer of adherend; be not particularly limited; but consider the weather resistance etc. after laminating on optical film, usually adopt the binding agent that (methyl) acrylate copolymer is cross-linked.
As (methyl) acrylate copolymer, multipolymer principal monomer and comonomer, functional monomer being carried out copolymerization can be enumerated, wherein, described principal monomer can enumerate n-butyl acrylate, 2-EHA, Isooctyl acrylate monomer, vinylformic acid ester in the different ninth of the ten Heavenly Stems etc.; Described comonomer can enumerate vinyl cyanide, vinyl acetate, methyl methacrylate, ethyl propenoate etc.; Described functional monomer can enumerate vinylformic acid, methacrylic acid, Hydroxyethyl acrylate, hy-droxybutyl, glycidyl methacrylate, N-methylol methacrylamide etc.In (methyl) acrylate copolymer, principal monomer and other monomers can be all (methyl) acrylate, also can contain one or more the monomer except (methyl) acrylate as the monomer beyond principal monomer.
In addition, (methyl) acrylate copolymer also can be made to carry out copolymerization with the compound containing polyoxyalkylene (polyoxyalkylene) or mix.As can copolymerization containing the compound of polyoxyalkylene, can enumerate: polyoxyethylene glycol (400) mono acrylic ester, polyoxyethylene glycol (400) monomethacrylates, methoxy poly (ethylene glycol) (400) acrylate, methoxy poly (ethylene glycol) (400) methacrylic ester, polypropylene glycol (400) mono acrylic ester, polypropylene glycol (400) monomethacrylates, methoxyl group polypropylene glycol (400) acrylate, methoxyl group polypropylene glycol (400) methacrylic ester etc.Carry out copolymerization by the principal monomer of the monomer and aforementioned (methyl) acrylate copolymer that these are contained polyoxyalkylene, functional monomer, the binding agent be made up of the multipolymer containing polyoxyalkylene can be obtained.
As the compound containing polyoxyalkylene that can carry out mixing with (methyl) acrylate copolymer, be preferably (methyl) acrylate copolymer containing polyoxyalkylene, be more preferably the polymkeric substance of (methyl) acrylic monomer containing polyoxyalkylene, such as, polyoxyethylene glycol (400) mono acrylic ester can be enumerated, polyoxyethylene glycol (400) monomethacrylates, methoxy poly (ethylene glycol) (400) acrylate, methoxy poly (ethylene glycol) (400) methacrylic ester, polypropylene glycol (400) mono acrylic ester, polypropylene glycol (400) monomethacrylates, methoxyl group polypropylene glycol (400) acrylate, the polymkeric substance of methoxyl group polypropylene glycol (400) methacrylic ester etc.Mixed with aforementioned (methyl) acrylate copolymer by the compound these being contained polyoxyalkylene, the binding agent of the compound that with the addition of containing polyoxyalkylene can be obtained.
For the solidifying agent made an addition in adhesive layer 2, as the linking agent making (methyl) acrylate copolymer crosslinked, isocyanate compound, epoxy compounds, melamine compound, metallo-chelate etc. can be enumerated.In addition, as tackifier, rosin based, coumarone-indenes class, terpenes, petroleum-type, phenols etc. can be enumerated.
To the thickness of the adhesive layer 2 used in surface protection film 10 of the present invention, be not particularly limited, such as, be preferably the thickness of about 5 ~ 40 μm, be more preferably the thickness of about 10 ~ 30 μm.When be about 0.03 ~ 0.3N/25mm for the stripping strength (cohesive force) of surface protection film to adherend surface, the adhesive layer 2 with micro-cohesive force time, the operability adherend during stripper surface protective membrane is excellent, therefore preferably.In addition, based on the viewpoint that operability when peeling stripping film 5 from surface protection film 10 is excellent, the peeling force preferably peeling stripping film 5 from adhesive layer 2 is 0.005 ~ 0.3N/50mm when the condition of peeling rate 0.3m/min, peel angle 180 ° measures.
In addition; for the stripping film 5 used in surface protection film 10 of the present invention; that stacked peeling agent layer 4 forms on the one side of resin molding 3, the static inhibitor that this peeling agent layer 4 contains the stripper using the resin containing chain alkyl as main component and do not react with this stripper.
As resin molding 3, polyester film, polyamide membrane, polyethylene film, polypropylene screen, polyimide film etc. can be enumerated, from the view point of excellent transparency and less expensive, be particularly preferably polyester film.Resin molding both can be unstretching film, also can be monadic stretching membrane or biaxially-stretched film.In addition, also the axial orientation angles formed along with crystallization of the stretching ratio of stretched film, stretched film can be controlled at particular value.
The thickness of resin molding 3 is not particularly limited, such as, is preferably the thickness of about 12 ~ 100 μm; If the thickness of about 20 ~ 50 μm then easy handling, therefore more preferably.
In addition, on the surface of resin molding 3, the surface modification also can implementing as required to carry out based on corona discharge, silane coupling agent the easy bondingization process such as to smear.
As form peeling agent layer 4, using containing the resin of chain alkyl as the stripper of main component, can enumerate: the known strippers containing chain alkyl such as the amino-alkyd resin containing chain alkyl, the acrylic resin containing chain alkyl, long-chain fat race pendant type resin (being selected from the resultant of reaction between the polymkeric substance of at least one in the derivatived cellulose of polyvinyl alcohol, ethylene/vinyl alcohol copolymer, polymine and hydroxyl containing active hydrogen and the isocyanic ester containing chain alkyl).Both can be add solidifying agent, uv initiator and be cured the stripper of reaction, also can be the stripper making solvent evaporates and be cured.
As " chain alkyl ", preferred carbonatoms is the alkyl of 8 ~ 30, carbonatoms also can be more than 10, more than 12, less than 18,24 such as the following, wherein, be preferably straight-chain alkyl.As object lesson, one or more the alkyl be selected from decyl, undecyl, lauroyl, dodecyl, tridecyl, myristyl, tetradecyl, pentadecyl, hexadecyl, palmityl, hexadecyl, heptadecyl, stearyl-, octadecyl, nonadecyl, eicosyl, docosyl etc. can be enumerated.
As the product of the resin system stripper city's mid-sales containing chain alkyl, such as, can enumerate: ASHIORESIN (ア シ オ レ ジ Application, the registered trademark) RA-30 that ASHIOCO., LTD. (ア シ オ Industry Co., Ltd) manufacture; Ipposha Oil Ind Co., Ltd. manufacture Piroiru (ピ ー ロ イ Le, registered trademark) 1010, Piroiru1010S, Piroiru1050, PiroiruHT; Resem (the レ ゼ system) N-137 that Zhong jing grease Co., Ltd. manufactures; Exceparl (エ キ セ パ ー Le, the registered trademark) PS-MA that Kao Corp manufactures; The TessFine (テ ス Off ァ イ Application, registered trademark) 303 etc. that Hitachi Chemical Co., Ltd. manufactures.
As the static inhibitor forming peeling agent layer 4, preferably for the favorable dispersity of resin as the stripper solution of main component to contain chain alkyl, and do not hinder the static inhibitor of resin as the solidification of the stripper of main component to contain chain alkyl.In addition, give antistatic effect in order to move from peeling agent layer 4 to the surface of adhesive layer 2 to adhesive layer, can use not with using the static inhibitor reacted as the stripper of main component containing the resin of chain alkyl.As such static inhibitor, preferred as alkali salt.
As an alkali metal salt, can enumerate: the metal-salt of lithium, sodium, potassium.Specifically, such as, preferably use the metal-salt be made up of positively charged ion and negatively charged ion, wherein, positively charged ion is selected from Li
+, Na
+, K
+in, negatively charged ion is selected from Cl
-, Br
-, I
-, BF
4 -, PF
6 -, SCN
-, ClO
4 -, CF
3sO
3 -, (FSO
2)
2n
-, (CF
3sO
2)
2n
-, (C
2f
5sO
2)
2n
-, (CF
3sO
2)
3c
-in.Wherein, particularly preferably LiBr, LiI, LiBF is used
4, LiPF
6, LiSCN, LiClO
4, LiCF
3sO
3, Li (FSO
2)
2n, Li (CF
3sO
2)
2n, Li (C
2f
5sO
2)
2n, Li (CF
3sO
2)
3the lithium salts such as C.These an alkali metal salts both can be used alone, and also can mix two or more use.In order to the stabilization of ionic substance, the compound containing polyoxyalkyl based structures also can be added.
Static inhibitor is relative to the addition of resin as the stripper of main component to contain chain alkyl; the kind according to static inhibitor, different and different from the affinity degree of stripper, as long as stripping static voltage required when considering stripper surface protective membrane adherend, to set the contaminative, bonding characteristic etc. of adherend.
For form peeling agent layer 4 using the resin containing chain alkyl as the stripper of main component and the blending means of static inhibitor, be not particularly limited.Any one method in following blending means can be adopted: using the resin containing chain alkyl as in the stripper of main component, after interpolation static inhibitor mixes, add stripper solidification catalyzer and the method mixed; Adopt organic solvent diluting in advance using the resin containing chain alkyl after the stripper of main component, the method that interpolation static inhibitor and stripper solidification catalyzer are also mixed; Adopt organic solvent diluting to contain the resin of chain alkyl after the stripper of main component in advance, add catalyzer and mix, then add static inhibitor and the method etc. mixed.In addition, as required, the material of the auxiliary antistatic effect of the adhesion promotors such as silane coupling agent, compound containing polyoxyalkylene etc. can also be added.
For using the resin containing chain alkyl as the stripper of main component and the mixture ratio of static inhibitor, be not particularly limited, but relative to the solids component 100 of resin as the stripper of main component to contain chain alkyl, preferred static inhibitor counts the ratio of about 5 ~ 100 with solids component.Relative to the solids component 100 of resin as the stripper of main component to contain chain alkyl, if the ratio being less than 5 with the addition of solids component conversion of static inhibitor, then the transfer amount of static inhibitor to adhesive layer surface also tails off, and is difficult to make adhesive layer play anlistatig function.In addition, relative to the solids component 100 of resin as the stripper of main component to contain chain alkyl, if the ratio of addition more than 100 converted with solids component of static inhibitor, then also can be transferred to adhesive layer surface using the resin containing chain alkyl as the stripper of main component together with static inhibitor, therefore, the bonding characteristic of adhesive layer can be reduced.
On the base material film 1 of surface protection film 10, form the method for adhesive layer 2 and the method for laminating stripping film 5 in the present invention, all can adopt known method to carry out, there is no particular limitation.Specifically, can enumerate: (1), by the resin combination for the formation of adhesive layer 2, the one side coating base material film 1 carries out drying, the method for stripping film 5 of fitting after forming adhesive layer; (2) drying is carried out on the surface resin combination for the formation of adhesive layer 2 being coated stripping film 5, after forming adhesive layer, the method etc. of laminating base material film 1.Any one method wherein can be adopted.
In addition, when adhesive layer 2 being formed at base material film 1 surperficial, known method can be adopted carry out.Specifically, reverse coating, comma scraper coating, intaglio plate coating, slit extrusion coated, wheat can be used to strangle the known coating processes such as rod (Mayerbar) coating, airblade coating.
In addition, similarly, when peeling agent layer 4 is formed at resin molding 3, known method can be adopted carry out.Specifically, can adopt that intaglio plate is coated with, wheat strangles known coating process such as rod coating, airblade coating etc.
For the surface protection film of the present invention 10 with above-mentioned formation, surface potential when peeling off from the optical film as adherend is preferably+0.7kV ~-0.7kV.Further, more preferably surface potential is+0.5kV ~-0.5kV, and particularly preferably surface potential is+0.3kV ~-0.3kV.This surface potential can be adjusted by the kind, addition etc. changing static inhibitor contained in peeling agent layer.
Fig. 2 is the sectional view representing the state peeling stripping film from surface protection film of the present invention.
By stripping film 5 is peeled from surface protection film 10 as shown in Figure 1; a part for the static inhibitor (Reference numeral 7) contained by peeling agent layer 4 of stripping film 5, is transferred (attachment) surface to the adhesive layer 2 of surface protection film 10.Therefore, in fig. 2, the static inhibitor on adhesive layer 2 surface being attached to surface protection film is schematically shown with the spot of Reference numeral 7.Be transferred to the surface of adhesive layer 2 by the composition of static inhibitor 7 from stripping film 5, compared with the adhesive layer 2 before transfer, reduce stripping static voltage when peeling adhesive layer 2 from adherend.In addition, stripping static voltage when peeling adhesive layer from adherend, can adopt known method to measure.Such as; after adherend surface protection film being fitted in Polarizer etc.; at use high speed electronic stripping tester (TESTER Industry Co., Ltd (TESTERSangyoCo.; Ltd.) manufacture) with while the peeling rate stripper surface protective membrane of per minute 40m; use the every 10ms of surface potential meter (Co., Ltd.'s Keyemce (KeyenceCorporation) manufacture) to measure the surface potential on adherend surface, and the maximum value of surface potential absolute value is now measured as stripping static voltage (kV).
For surface protection film of the present invention, when being fitted in adherend by the surface protection film 11 having peeled the state of stripping film shown in Fig. 2, the static inhibitor being transferred to this adhesive layer 2 surface contacts with adherend surface.By this operation, stripping static voltage when again peeling surface protection film from adherend can be suppressed lower.
Fig. 3 is the sectional view of the embodiment representing optics of the present invention.
Stripping film 5 is being peeled from surface protection film 10 of the present invention thus under the state that exposes of adhesive layer 2, is being fitted on the optics 8 as adherend by this adhesive layer 2.
That is, figure 3 illustrates the optics 20 being fitted with surface protection film 10 of the present invention.As optics, the optical films such as Polarizer, polarizer, lens coating, the Polarizer being also used as polarizer, the Polarizer being also used as lens coating can be enumerated.This optics is used as the component parts of the liquid crystal indicators such as display panels, various measuring instrument class optical system devices etc.In addition, as optics, the optical films such as antireflection film, hard coat film, touch panel nesa coating can also be enumerated.
Based on optics of the present invention, when using surface protection film 10 from as adherend optics (optical film) peel off remove time, can fully will peel off static voltage suppression in low-level.Therefore, do not worry the circuit block that can destroy drive IC, TFT element, gate line drive circuit etc., the production efficiency in operations such as manufacturing display panels can be improved, guarantee the reliability of production process.
Embodiment
Below, the present invention is further illustrated by embodiment.
(manufacture of surface protection film)
(embodiment 1)
By 3.125 weight parts using the resin containing chain alkyl, as the stripper of main component, (name of product is " TessFine (テ ス Off ァ イ Application) 303 ", Hitachi Chemical Co., Ltd. manufactures), two (fluorine sulphonyl) imine lithium 10% ethyl acetate solution of 10 weight parts, the toluene of 96.875 weight parts and vinyl acetic monomer are the mixed solvent of 50:50, (name of product is " Dryer (De ラ イ ヤ ー) 900 " to the catalyzer of 0.09 weight part, Hitachi Chemical Co., Ltd. manufactures) mix and be uniformly mixed, prepare the coating forming the peeling agent layer of embodiment 1.Wheat is adopted to strangle rod, by the coating of the peeling agent layer of embodiment 1, in the mode making dried thickness become 0.2 μm, be coated on the surface that thickness is the polyethylene terephthalate film of 38 μm, and in the heated air circulation type baker of 120 DEG C dry 1 minute, obtain the stripping film of embodiment 1.On the other hand, 2-EHA and vinylformic acid 2-hydroxyl ethyl ester are carried out copolymerization with the weight ratio of 100:4, it is acrylate copolymer 30 weight part of 470,000 by obtained weight-average molecular weight, be dissolved in the vinyl acetic monomer of 70 weight parts and obtain binding agent (solid component content is the ethyl acetate solution of 30%), relative to this binding agent of 100 weight parts, add and mix the HDI class solidifying agent of 1.2 weight parts (name of product is " Coronate (コ ロ ネ ー ト, registered trademark) HX ", Nippon Polyurethane Industry Co., Ltd. (NipponPolyurethaneIndustryCo., Ltd.) manufacture) and form baste, and this baste is coated in the mode making dried thickness and become 20 μm the surface that thickness is the polyethylene terephthalate film of 38 μm, then by the heated air circulation type oven drying of 100 DEG C 2 minutes, thus define adhesive layer.Then, on the surface of this adhesive layer, the peeling agent layer (stripper treated side) of the stripping film of the embodiment 1 of above-mentioned manufacture of having fitted.Obtained adhesive film is incubated 5 days under the environment of 40 DEG C, to make adhesive cures, obtains the surface protection film of embodiment 1.
(embodiment 2)
By 8.33 weight parts using the resin containing chain alkyl as stripper (name of product be " the Piroiru (ピ ー ロ イ Le) HT of main component ", Ipposha Oil Ind Co., Ltd. manufactures), two (fluoroform sulphonyl) imine lithium 10% ethyl acetate solution of 10 weight parts, toluene and the vinyl acetic monomer of 91.67 weight parts be that the mixed solvent of 50:50 mixes and is uniformly mixed, and prepared the coating of the peeling agent layer of formation embodiment 2.Wheat is adopted to strangle rod, by the coating of the peeling agent layer of embodiment 2, in the mode making dried thickness become 0.2 μm, be coated on the surface that thickness is the polyethylene terephthalate film of 38 μm, and in the heated air circulation type baker of 120 DEG C dry 1 minute, obtain the stripping film of embodiment 2.Replace except using the stripping film of embodiment 2, except the stripping film of embodiment 1, operating similarly to Example 1, obtaining the protective membrane of embodiment 2.
(embodiment 3)
By 1.5 weight parts using the resin containing chain alkyl, as the stripper of main component, (name of product is " Piroiru1010S ", Ipposha Oil Ind Co., Ltd. manufactures), two (fluorine sulphonyl) imine lithium 10% ethyl acetate solution of 10 weight parts, the toluene of 98.5 weight parts is 50:40:10 with vinyl acetic monomer and Virahol mixed solvent mixes and is uniformly mixed, and prepared the coating of the peeling agent layer of formation embodiment 3.Wheat is adopted to strangle rod, by the coating of the peeling agent layer of embodiment 3, in the mode making dried thickness become 0.2 μm, be coated on the surface that thickness is the polyethylene terephthalate film of 38 μm, and in the heated air circulation type baker of 120 DEG C dry 1 minute, obtain the stripping film of embodiment 2.Replace except using the stripping film of embodiment 3, except the stripping film of embodiment 1, operating similarly to Example 1, obtaining the protective membrane of embodiment 3.
(comparative example 1)
By 3.125 weight parts using the resin containing chain alkyl, as the stripper of main component, (name of product is " TessFine303 ", Hitachi Chemical Co., Ltd. manufactures), the toluene of 96.875 weight parts and vinyl acetic monomer be the mixed solvent of 50:50,0.09 weight part catalyzer (name of product is " Dryer (De ラ イ ヤ ー) 900 ", Hitachi Chemical Co., Ltd. manufactures) mix and be uniformly mixed, prepare the coating forming the peeling agent layer of comparative example 1.Wheat is adopted to strangle rod, by the coating of the peeling agent layer of comparative example 1, in the mode making dried thickness become 0.2 μm, be coated on the surface that thickness is the polyethylene terephthalate film of 38 μm, and in the heated air circulation type baker of 120 DEG C dry 1 minute, obtain the stripping film of embodiment 1.On the other hand, relative to the binding agent (solid component content is the ethyl acetate solution of 30%) of 100 parts by weight of example 1, add and be mixed with two (fluorine sulphonyl) imine lithium 10% ethyl acetate solution of 5 weight parts, (name of product is " Coronate (コ ロ ネ ー ト to the HDI class solidifying agent of 1.2 weight parts, registered trademark) HX ", Nippon Polyurethane Industry Co., Ltd. (NipponPolyurethaneIndustryCo., Ltd.) manufacture) and form baste, and this baste is coated in the mode making dried thickness and become 20 μm the surface that thickness is the polyethylene terephthalate film of 38 μm, then by the heated air circulation type oven drying of 100 DEG C 2 minutes, thus define adhesive layer.Then, on the surface of this adhesive layer, the peeling agent layer (polysiloxane treated side) of the stripping film of above-mentioned manufactured comparative example 1 of having fitted.Obtained adhesive film is incubated 5 days under the environment of 40 DEG C, to make adhesive cures, obtains the surface protection film of comparative example 1.
(comparative example 2)
Except do not add two (fluorine sulphonyl) imine lithium in peeling agent layer except, operate similarly to Example 3, obtain the surface protection film of comparative example 2.
Below, method and the result of evaluation test are shown.
The measuring method > of the surface resistivity of < peeling agent layer and adhesive layer
Adopt Hiresta (the Ha イ レ ス タ that Mitsubishi chemical Co., Ltd manufactures; registered trademark)-UP; under impressed voltage 100V, the minute condition of 30 seconds, determine the surface resistivity of the surface resistivity of the peeling agent layer of stripping film and the adhesive layer of surface protection film.During mensuration, determine respectively independent stripping film (stripping film monomer) is incubated 5 days under 40 DEG C of environment and carry out aging after the surface resistivity A of peeling agent layer of sample; From obtain after the surface protection film (adhesive film of fitted adhesive layer and peeling agent layer being incubated under 40 DEG C of environment the surface protection film obtained to make adhesive cures for 5 days) of each embodiment and comparative example peels stripping film, the surface resistivity B of adhesive layer of surface protection film and the surface resistivity C of the peeling agent layer of stripping film.
The measuring method > of the peeling force of < stripping film
With the sample of the size cutting surfaces protective membrane of width 50mm, length 150mm.Under the testing circumstance of 23 DEG C × 50%RH, use tensile testing machine to peel stripping film with the peeling rate of 300mm/ minute off to 180 ° of directions, measure intensity now, and it can be used as the peeling force (N/50mm) of stripping film.
The measuring method > of the cohesive force of < surface protection film
Adopt rigging machine to fit in glass pane surface and anti-dazzlely lowly reflect the Polarizer (AG-LR Polarizer) processed.Then, be after the surface protection film of 25mm fits in the surface of Polarizer by cutting into width, keeping 1 day under the testing circumstance of 23 DEG C × 50%RH.Then, use tensile testing machine to peel off surface protection film with the peeling rate of 300mm/ minute to 180 ° of directions, measure intensity now, and it can be used as cohesive force (N/25mm).
The measuring method > of the stripping static voltage of < surface protection film
Adopt rigging machine to fit in glass pane surface and anti-dazzlely lowly reflect the Polarizer (AG-LR Polarizer) processed.Then, be after the surface protection film of 25mm fits in the surface of Polarizer by cutting into width, keeping 1 day under the testing circumstance of 23 DEG C × 50%RH.Then; at use high speed electronic stripping tester (TESTER Industry Co., Ltd (TESTERSangyoCo.; Ltd.) manufacture) with while the peeling rate stripper surface protective membrane of per minute 40m; the every 10ms of surface potential meter (Co., Ltd.'s Keyemce (KeyenceCorporation) manufacture) is used to measure the surface potential on aforementioned Polarizer surface, and using the maximum value of surface potential absolute value now as stripping static voltage (kV).
The confirmation method > of the surface contamination of < surface protection film
Adopt rigging machine to fit in glass pane surface and anti-dazzlely lowly reflect the Polarizer (AG-LR Polarizer) processed.Then, be after the surface protection film of 25mm fits in the surface of Polarizer by cutting into width, keeping 3 days and 30 days under the testing circumstance of 23 DEG C × 50%RH.Then, peel surface protection film, by visual observations, Polarizer surface has pollution-free, confirms surface contamination.As the determinating reference of surface contamination, when Polarizer is judged to be (zero) during free of contamination transfer, be judged to be (×) when confirmation Polarizer has during the transfer of pollution.
The surface protection film of obtained embodiment 1 ~ 3 and comparative example 1 ~ 2 is measured, and measurement result is shown in Table 1.Wherein, " 2EHA " refers to 2-EHA, " HEA " refers to vinylformic acid-2-hydroxyl ethyl ester, " LiFSI " refers to two (fluorine sulphonyl) imine lithium, " LiTFSI " refers to two (fluoroform sulphonyl) imine lithium, " 303 " refer to TessFine303, and " Dryer " refers to Dryer900, and " HT " refers to PiroiruHT The, " 1010S " refers to Piroiru1010S.
In addition; respectively; surface resistivity A refer to independent stripping film (stripping film monomer) carry out aging after the surface resistivity (Ω/) in stripper face of stripping film; surface resistivity B refers to the surface resistivity (Ω/) peeling the binding agent face of the surface protection film after stripping film from surface protection film, and surface resistivity C refers to the surface resistivity (Ω/) in the stripper face from the stripping film after binding agent face peels.OR in table is writing a Chinese character in simplified form of " OverRange (over range) ", refer to the measurement range beyond surface resistivity instrument (Hiresta (Ha イ レ ス タ)-UP), being meant to surface resistivity is 1E+13 Ω/more than.In addition, the value of surface resistivity is that the exponential notation specified by JISX0210 is marked.Such as, 3.9E+8 refers to 8 powers of 3.9 × 10.
Table 1
According to the measurement result shown in table 1, known following situation.
The surface protection film of embodiments of the invention 1 ~ 3 has suitable cohesive force, does not pollute the surface of adherend, and forces down from the stripping electrostatic adherend during stripper surface protective membrane.In addition, the surface resistivity of the peeling agent layer of stripping film is 8.4E+7 ~ 3.9E+8 Ω/ when independent stripping film (stripping film monomer), but fit in binding agent face and the surface resistivity of the peeling agent layer of stripping film after peeling off then beyond rated range (overrange) (1.0E+13 Ω/more than), in contrast to this, the surface resistivity in binding agent face is reduced to 3.7E+10 ~ 5.9E+10 Ω/.It can thus be appreciated that static inhibitor moves from stripper towards binding agent face.
On the other hand, for the addition of in adhesive layer static inhibitor comparative example 1 surface protection film for, although to force down and good from the stripping electrostatic adherend during stripper surface protective membrane, many to the pollution of adherend after peeling off.In addition, in the comparative example 2 not using static inhibitor, though improve the contaminative to adherend, the stripping static voltage adherend during stripper surface protective membrane is high.
Industrial applicibility
Surface protection film of the present invention, such as, can be applied in the optical film of Polarizer, polarizer, lens coating etc., in addition, in the production process etc. of various opticses etc., fits in this optics etc. and for the protection of its surface.In addition; surface protection film of the present invention; the static content produced when peeling off from adherend can be reduced; and; antistripping antistatic property is few to the pollution of adherend without rheological parameters' change with time (can not change along with time lapse); can improve the yield rate of production process, utility value is industrially large.
Claims (6)
1. a surface protection film, it is formed with adhesive layer on the one side of the base material film be made up of the resin with the transparency, and the surface protection film of the stripping film with peeling agent layer of having fitted on this adhesive layer, wherein,
This stripping film is that stacked peeling agent layer forms on the one side of resin molding, the static inhibitor that described peeling agent layer comprises the stripper using the resin containing chain alkyl as main component and do not react with this stripper,
Described static inhibitor composition to the transfer of the surface of described adhesive layer, reduces stripping static voltage when being peeled off from adherend by described adhesive layer from described stripping film.
2. surface protection film as claimed in claim 1, wherein, described static inhibitor is an alkali metal salt.
3. surface protection film as claimed in claim 1 or 2, wherein, described adhesive layer (methyl) acrylate copolymer is cross-linked form.
4. the surface protection film according to any one of claims 1 to 3, wherein, surface potential when peeling off from the optical film as adherend is+0.7kV ~-0.7kV.
5. the surface protection film according to any one of Claims 1 to 4, wherein, the peeling force of described stripping film when peeling off from described adhesive layer is 0.005 ~ 0.3N/50mm.
6. an optics, it is fitted with the surface protection film according to any one of Claims 1 to 5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014171626A JP6224547B2 (en) | 2014-08-26 | 2014-08-26 | Surface protective film and optical component on which it is bonded |
| JP2014-171626 | 2014-08-26 |
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| CN105385370A true CN105385370A (en) | 2016-03-09 |
| CN105385370B CN105385370B (en) | 2020-06-19 |
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| JP (1) | JP6224547B2 (en) |
| KR (2) | KR101891974B1 (en) |
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| CN111440556A (en) * | 2019-09-29 | 2020-07-24 | 宁波激智科技股份有限公司 | Protective film and preparation method thereof |
| CN112005132A (en) * | 2018-03-29 | 2020-11-27 | 东洋纺株式会社 | Antifouling film with protective film and method for producing same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6500821B2 (en) * | 2016-03-19 | 2019-04-17 | 三菱ケミカル株式会社 | Laminated film |
| JP6471712B2 (en) * | 2016-03-19 | 2019-02-20 | 三菱ケミカル株式会社 | Laminated film |
| JP6888010B2 (en) * | 2016-07-28 | 2021-06-16 | 日東電工株式会社 | Reinforcing film with separator |
| JP6997976B2 (en) * | 2017-10-13 | 2022-01-18 | 東レフィルム加工株式会社 | Release film for epoxy resin-containing layer transfer film and epoxy resin-containing layer transfer film |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6224547B2 (en) | 2017-11-01 |
| CN105385370B (en) | 2020-06-19 |
| TW201936397A (en) | 2019-09-16 |
| KR101891974B1 (en) | 2018-08-27 |
| KR20180095791A (en) | 2018-08-28 |
| KR20160024742A (en) | 2016-03-07 |
| TW201612010A (en) | 2016-04-01 |
| TWI726330B (en) | 2021-05-01 |
| TWI665086B (en) | 2019-07-11 |
| KR101981503B1 (en) | 2019-05-23 |
| JP2016044283A (en) | 2016-04-04 |
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