JP2016169319A - Functional film having adhesive layer and film set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a functional film having an adhesive layer with excellent reworkability and detachability after an elapse of a long time, capable of preventing air bubbles from being involved when adhered to an adherend.SOLUTION: A functional film having an adhesive layer includes a functional film composed of one or more layers, an adhesive layer, and a separator adhered on a surface of the adhesive layer in this order. The wetting rate on the surface of the adhesive layer is 5 cm/sec. or more with regard to a glass plate after the separator is detached from the surface of the adhesive layer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a functional film with an adhesive layer. The present invention also relates to a film set.

  In recent years, a functional film such as an optical film is attached to a transparent base material such as glass, and the functional film is visually recognized through the transparent base material (for example, see Patent Document 1).

  In order to stick a functional film such as an optical film to a transparent substrate such as glass, an adhesive is usually used. That is, the functional film with an adhesive layer which provided the adhesive layer in the functional film is used. When sticking such a functional film with a pressure-sensitive adhesive layer to a transparent substrate, air bubbles are caught in the interface between the pressure-sensitive adhesive layer and the transparent substrate, and the function that the functional film should originally express is sufficiently There is a possibility that it cannot be expressed.

  As mentioned above, as one of the causes of bubbles entrained at the interface between the functional film with a pressure-sensitive adhesive layer and the transparent substrate, the wettability of the surface of the pressure-sensitive adhesive layer is poor and it is difficult to stick without entraining the bubbles. If the adhesive layer has a strong adhesive force on the surface and it is difficult to reattach it when air bubbles have entered it, or between the adherend and the functional film with the adhesive layer The case where a foreign substance mixes is considered. In particular, it is conceivable that the foreign matter is mixed in and the bubbles are involved, that is, the foreign matter step absorbability of the pressure-sensitive adhesive layer is low, or that the foreign matter is attracted by charging at the interface between the pressure-sensitive adhesive layer and the transparent substrate. As such charging, charging of the surface of the transparent substrate (sticking surface) and charging of the surface of the pressure-sensitive adhesive layer (sticking surface) can be considered.

  Among the above-described charging, it is not easy to suppress the charging of the surface (sticking surface) of the pressure-sensitive adhesive layer. The surface of the pressure-sensitive adhesive layer (sticking surface) is usually provided with a separator until the sticking work, and peels off during the sticking work. This is because there is a problem that the surface (attachment surface) of the substrate is charged.

  In addition, when an optical film such as a polarizing plate is attached to an adherend (for example, a transparent substrate such as glass), the optical film such as the polarizing plate is relatively expensive. Since fine adjustment may be required, reworkability that allows easy re-peeling and re-sticking after sticking is required. Furthermore, since the attached optical film becomes unnecessary, re-peelability that can be easily removed even after a long time has elapsed after application is also required.

JP 2014-240446 A

  An object of the present invention is to provide a functional film with a pressure-sensitive adhesive layer that can suppress entrainment of bubbles when sticking to an adherend and is excellent in reworkability and re-peelability after a long time. is there.

The functional film with an adhesive layer of the present invention is
A functional film with a pressure-sensitive adhesive layer comprising a functional film comprising one or more layers, a pressure-sensitive adhesive layer, and a separator attached to the surface of the pressure-sensitive adhesive layer in this order,
The wetting speed of the surface of the pressure-sensitive adhesive layer after peeling the separator from the surface of the pressure-sensitive adhesive layer is 5 cm ² / second or more.

  In preferable embodiment, the thickness of the said adhesive layer is 30 micrometers-200 micrometers.

  In preferable embodiment, the adhesive force with respect to the glass plate of the surface of this adhesive layer after peeling the said separator from the surface of the said adhesive layer is 1.0N / 25mm-0.005N / 25mm.

  In a preferred embodiment, the separator has an antistatic layer on the surface side of the pressure-sensitive adhesive layer.

  In a preferred embodiment, when the separator is peeled from the surface of the pressure-sensitive adhesive layer at a peeling angle of 150 degrees and a peeling speed of 10 m / min, the surface voltage of the pressure-sensitive adhesive layer is less than 1.0 kV. .

  In preferable embodiment, the said adhesive layer contains a silicone type adhesive.

The functional film with an adhesive layer of the present invention is
A functional film composed of one or more layers, including a pressure-sensitive adhesive layer in this order, is a functional film with a pressure-sensitive adhesive layer,
The pressure-sensitive adhesive layer is the outermost layer;
An antistatic agent is present on at least a part of the surface of the pressure-sensitive adhesive layer;
The pressure-sensitive adhesive layer has a thickness of 30 μm to 100 μm.

  In preferable embodiment, the said adhesive layer contains a silicone type adhesive.

  In a preferred embodiment, the functional film is a polarizing plate.

  The film set of the present invention is a functional film with a pressure-sensitive adhesive layer of the present invention used for placing on one side of a transparent substrate, and a low reflection film used for placing on the other side of the transparent substrate. Including.

  According to the present invention, it is possible to provide a functional film with a pressure-sensitive adhesive layer that can suppress air bubbles from being involved when sticking to an adherend, and is excellent in reworkability and re-peelability after a long period of time. it can.

  Moreover, since the adhesive layer in the functional film with an adhesive layer of this invention preferably can express favorable wettability, workability | operativity at the time of sticking to a transparent base material, etc. can improve.

  Furthermore, the pressure-sensitive adhesive layer in the functional film with the pressure-sensitive adhesive layer of the present invention is preferably formed with bubbles even if foreign matter is caught in the interface between the functional film with the pressure-sensitive adhesive layer and the transparent substrate. hard.

  According to this invention, the film set containing the functional film with an adhesive layer of this invention arrange | positioned on one side of a transparent base material, and the low reflection film arrange | positioned on the other side of this transparent base material is provided. can do. Thus, the film set which can be provided can express the outstanding antireflection performance in addition to the said various effects which the functional film with an adhesive layer of this invention can express.

It is a schematic sectional drawing of the 1st functional film with an adhesive layer by preferable embodiment of this invention. It is a schematic sectional drawing of the 2nd functional film with an adhesive layer by preferable embodiment of this invention.

≪A. First functional film with pressure-sensitive adhesive layer of the present invention >>
One of the preferred embodiments of the functional film with an adhesive layer of the present invention (sometimes referred to as the first functional film with an adhesive layer of the present invention) is a functional film composed of one or more layers, an adhesive. And a separator attached to the surface of the pressure-sensitive adhesive layer in this order, and the pressure-sensitive adhesive layer is the outermost layer.

  The 1st functional film with an adhesive layer of this invention contains the separator stuck on the surface of the functional film which consists of 1 layer or more, an adhesive layer, and this adhesive layer in this order, and this adhesive layer is If it is the outermost layer, any appropriate other member may be included as long as the effects of the present invention are not impaired. The first functional film with a pressure-sensitive adhesive layer of the present invention is preferably formed by laminating a functional film composed of one or more layers, a pressure-sensitive adhesive layer, and a separator in this order.

  An example of a schematic cross-sectional view of the first functional film with an adhesive layer of the present invention is shown in FIG. As shown in FIG. 1, the first functional film 100 with the pressure-sensitive adhesive layer of the present invention preferably has a functional film 10 composed of one or more layers, a pressure-sensitive adhesive layer 20, and a separator 30 laminated in this order. Become.

  Arbitrary appropriate thickness can be employ | adopted for the thickness of the functional film which consists of 1 layer or more by the function which can be expressed with this film. Such thickness is preferably 1000 μm to 5 μm, more preferably 750 μm to 10 μm, still more preferably 500 μm to 20 μm, and particularly preferably 300 μm to 25 μm.

  The thickness of the pressure-sensitive adhesive layer is 30 μm to 200 μm, preferably 32 μm to 175 μm, more preferably 35 μm to 150 μm, still more preferably 40 μm to 125 μm, and particularly preferably 50 μm to 100 μm. By adjusting the thickness of the pressure-sensitive adhesive layer within the above range, the effects of the present invention can be sufficiently exhibited. When the thickness of the pressure-sensitive adhesive layer is outside the above range and is too small, the first pressure-sensitive adhesive layer function of the present invention is applied when the first functional film with the pressure-sensitive adhesive layer of the present invention is adhered to a transparent substrate. When foreign matter is caught in the interface between the conductive film and the transparent substrate, there is a possibility that bubbles are easily formed. If the thickness of the pressure-sensitive adhesive layer is too large outside the above range, the cost will increase and the productivity will deteriorate, which is not suitable.

  The thickness of the separator can be set to any appropriate thickness depending on the application. From the viewpoint of sufficiently expressing the effects of the present invention, the thickness is preferably 10 μm to 100 μm, more preferably 15 μm to 90 μm, still more preferably 17 μm to 80 μm, and particularly preferably 19 μm to 75 μm.

  The first functional film with the pressure-sensitive adhesive layer of the present invention has a surface voltage of the pressure-sensitive adhesive layer when the separator is peeled from the surface of the pressure-sensitive adhesive layer at a peeling angle of 150 degrees and a peeling speed of 10 m / min. Is preferably less than 1.0 kV, more preferably 0 kV to 1 kV, still more preferably 0 kV to 0.9 kV, particularly preferably 0 kV to 0.8 kV, and most preferably 0 kV to 0.7 kV. It is. In the first functional film with the pressure-sensitive adhesive layer of the present invention, when the separator is peeled from the surface of the pressure-sensitive adhesive layer at a peeling angle of 150 degrees and a peeling speed of 10 m / min, the surface voltage of the pressure-sensitive adhesive layer is Is within the above range, it is possible to provide a functional film with a pressure-sensitive adhesive layer in which charging of the surface of the pressure-sensitive adhesive layer is suppressed.

In the first functional film with the pressure-sensitive adhesive layer of the present invention, the wetting rate of the surface of the pressure-sensitive adhesive layer after peeling the separator from the surface of the pressure-sensitive adhesive layer is preferably 5 cm ² / sec or more. More preferably, it is 7 cm ² / second or more, more preferably 9 cm ² / second or more, particularly preferably 10 cm ² / second or more, and most preferably 11 cm ² / second or more. In the first functional film with the pressure-sensitive adhesive layer of the present invention, the wetting speed of the surface of the pressure-sensitive adhesive layer after the separator is peeled from the surface of the pressure-sensitive adhesive layer falls within the above range. The pressure-sensitive adhesive layer in the first functional film with a pressure-sensitive adhesive layer can exhibit good wettability, and workability and the like when sticking to a sticking surface (such as a transparent substrate) can be improved.

  In the first functional film with an adhesive layer of the present invention, the adhesive force to the glass plate on the surface of the adhesive layer after peeling the separator from the surface of the adhesive layer is preferably 1.0 N / 25 mm to 0. 0.005 N / 25 mm, more preferably 0.75 N / 25 mm to 0.0075 N / 25 mm, still more preferably 0.50 N / 25 mm to 0.01 N / 25 mm, and particularly preferably 0.30 N / 25 mm to 0.015 N / 25 mm. In the 1st functional film with an adhesive layer of this invention, when the adhesive force with respect to the glass plate of the surface of this adhesive layer after peeling a separator from the surface of an adhesive layer is settled in the said range, this invention. Since the pressure-sensitive adhesive layer in the first functional film with a pressure-sensitive adhesive layer has a relatively light adhesive force, it can exhibit excellent reworkability. Furthermore, even if air bubbles are mixed, the air bubbles can be pushed out with a hand or a roller. Conversely, if the adhesive strength is too light, the bonded functional film may be peeled off.

  The 1st functional film with an adhesive layer of this invention is the adhesive force with respect to the glass plate after heat-treating the surface of this adhesive layer after peeling a separator from the surface of an adhesive layer at 50 degreeC for 2 weeks. However, it is preferably 1.0 N / 25 mm to 0.005 N / 25 mm, more preferably 0.75 N / 25 mm to 0.0075 N / 25 mm, and still more preferably 0.50 N / 25 mm to 0.01 N / 25 mm. And particularly preferably 0.30 N / 25 mm to 0.015 N / 25 mm. 1st functional film with an adhesive layer of this invention WHEREIN: The adhesive force with respect to the glass plate after heat-treating the surface of this adhesive layer after peeling a separator from the surface of an adhesive layer at 50 degreeC for 2 weeks Is within the above range, the pressure-sensitive adhesive layer in the first functional film with the pressure-sensitive adhesive layer of the present invention has a relatively light adhesive force even after a long period of time. Excellent removability can be exhibited.

<Functional film consisting of A-1.1 layers or more>
As the functional film composed of one or more layers, any appropriate functional film can be adopted depending on the function desired to be expressed by the functional film. As the number of layers of such a functional film, a functional film consisting of only one layer may be used, or a functional film having two or more layers may be used.

  The functional film having two or more layers may contain any appropriate member (film or the like) as long as the effects of the present invention are not impaired.

  Examples of the functional film having two or more layers include a multilayer optical film including a polarizer, and specifically, for example, a polarizing plate. In particular, it is preferable to use a polarizing plate because s-polarized light generated due to a difference in reflectance when natural light is reflected at the interface can be cut.

  The functional film with the first pressure-sensitive adhesive layer of the present invention can suppress the charging of the surface of the pressure-sensitive adhesive layer, and prevents bubbles from being caught at the interface between the pressure-sensitive adhesive layer and its sticking surface (transparent substrate, etc.). Therefore, when a multilayer optical film including a polarizer (particularly a polarizing plate) is employed as the functional film having two or more layers, an optical function that should be originally expressed by the multilayer optical film including the polarizer can be sufficiently expressed. Moreover, the pressure-sensitive adhesive layer in the functional film with a pressure-sensitive adhesive layer of the present invention is preferably a bubble even if foreign matter is caught in the interface between the pressure-sensitive adhesive layer and its sticking surface (transparent substrate, etc.). Therefore, when a multilayer optical film including a polarizer (especially a polarizing plate) is employed as a laminated film of two or more layers, the optical function that the multilayer optical film including a polarizer (particularly a polarizing plate) should originally express Can be fully expressed. Furthermore, multilayer optical films (especially polarizing plates) containing polarizers are often relatively expensive, and have excellent reworkability that they are peeled off after being stuck on a sticking surface (such as a transparent substrate) and then stuck again. Although required, since the pressure-sensitive adhesive layer in the functional film with a pressure-sensitive adhesive layer of the present invention preferably has a relatively light adhesive force, it can exhibit excellent reworkability. In addition, the pressure-sensitive adhesive layer in the functional film with a pressure-sensitive adhesive layer of the present invention preferably exhibits good wettability, so that workability and the like at the time of sticking to a sticking surface (such as a transparent substrate) is improved. Can do.

  The light transmittance of the polarizer with respect to the entire visible light is about 40%. In principle, the light transmittance of the polarizer with respect to the entire visible light does not exceed 50%. As such a polarizer, any appropriate polarizer can be adopted as long as the effects of the present invention are not impaired. The degree of polarization of the polarizer is preferably 99.5% to 100%, more preferably 99.9% to 100%. Such light transmittance and degree of polarization can be measured using a spectrophotometer.

  Any appropriate polarizer may be adopted as the polarizer depending on the purpose. For example, dichroic substances such as iodine and dichroic dyes are adsorbed on hydrophilic polymer films such as polyvinyl alcohol films, partially formalized polyvinyl alcohol films, and ethylene / vinyl acetate copolymer partially saponified films. And a polyene-based oriented film such as a uniaxially stretched product, a polyvinyl alcohol dehydrated product or a polyvinyl chloride dehydrochlorinated product. Also, guest / host type E-type and O-type polarizers in which a liquid crystalline composition containing a dichroic substance and a liquid crystalline compound disclosed in US Pat. No. 5,523,863 is aligned in a certain direction. In addition, E-type and O-type polarizers in which lyotropic liquid crystals disclosed in US Pat. No. 6,049,428 are aligned in a certain direction can also be used.

  Among such polarizers, from the viewpoint of having a high degree of polarization, a polarizer made of a polyvinyl alcohol (PVA) film containing iodine is preferably used. Polyvinyl alcohol or a derivative thereof is used as a material for the polyvinyl alcohol film applied to the polarizer. Derivatives of polyvinyl alcohol include polyvinyl formal, polyvinyl acetal, and the like, olefins such as ethylene and propylene, unsaturated carboxylic acids such as acrylic acid, methacrylic acid, and crotonic acid, and their alkyl esters and acrylamide. Things. Polyvinyl alcohol having a polymerization degree of about 1000 to 10,000 and a saponification degree of about 80 to 100 mol% are generally used.

  The polyvinyl alcohol film (unstretched film) is at least subjected to uniaxial stretching treatment and iodine dyeing treatment according to a conventional method. Furthermore, boric acid treatment and iodine ion treatment can be performed. Moreover, the polyvinyl alcohol film (stretched film) subjected to the above treatment is dried according to a conventional method to become a polarizer.

  The stretching method in the uniaxial stretching treatment is not particularly limited, and either a wet stretching method or a dry stretching method can be employed. Examples of the stretching means of the dry stretching method include an inter-roll stretching method, a heated roll stretching method, and a compression stretching method. Stretching can also be performed in multiple stages. In the stretching means, the unstretched film is usually heated. Usually, an unstretched film having a thickness of about 30 μm to 150 μm is used. The stretch ratio of the stretched film can be appropriately set according to the purpose, but the stretch ratio (total stretch ratio) is about 2 to 8 times, preferably 3 to 6.5 times, more preferably 3.5 to 6 times. Is double. The thickness of the stretched film is preferably about 5 μm to 40 μm.

  The iodine staining treatment is performed by immersing the polyvinyl alcohol film in an iodine solution containing iodine and potassium iodide. The iodine solution is usually an iodine aqueous solution, and contains iodine and potassium iodide as a dissolution aid. The iodine concentration is preferably about 0.01 wt% to 1 wt%, more preferably 0.02 wt% to 0.5 wt%, and the potassium iodide concentration is preferably 0.01 wt% to 10 wt%. %, More preferably 0.02 to 8% by weight.

  In the iodine staining treatment, the temperature of the iodine solution is usually about 20 ° C to 50 ° C, preferably 25 ° C to 40 ° C. The immersion time is usually in the range of about 10 seconds to 300 seconds, preferably 20 seconds to 240 seconds. In the iodine dyeing treatment, the iodine content and potassium content in the polyvinyl alcohol film are in desired ranges by adjusting the conditions such as the concentration of the iodine solution, the immersion temperature of the polyvinyl alcohol film in the iodine solution, and the immersion time. Adjust so that The iodine dyeing process may be performed at any stage before the uniaxial stretching process, during the uniaxial stretching process, or after the uniaxial stretching process.

  The boric acid treatment is performed by immersing a polyvinyl alcohol film in an aqueous boric acid solution. The boric acid concentration in the boric acid aqueous solution is about 2 to 15% by weight, preferably 3 to 10% by weight. The aqueous boric acid solution can contain potassium ions and iodine ions with potassium iodide. The potassium iodide concentration in the boric acid aqueous solution is preferably about 0.5 to 10% by weight, more preferably 1 to 8% by weight. A boric acid aqueous solution containing potassium iodide can provide a lightly colored polarizer, that is, a so-called neutral gray polarizer having a substantially constant absorbance over almost the entire wavelength range of visible light.

  For the iodine ion treatment, for example, an aqueous solution containing iodine ions with potassium iodide or the like is used. The potassium iodide concentration is preferably about 0.5 to 10% by weight, more preferably 1 to 8% by weight. In the iodine ion impregnation treatment, the temperature of the aqueous solution is usually about 15 ° C to 60 ° C, preferably 25 ° C to 40 ° C. The immersion time is usually in the range of about 1 second to 120 seconds, preferably 3 seconds to 90 seconds. The stage of iodine ion treatment is not particularly limited as long as it is before the drying process. It can also be performed after water washing described later.

  The polyvinyl alcohol film (stretched film) subjected to the above treatment can be subjected to a water washing step and a drying step according to a conventional method.

  Arbitrary appropriate drying methods, for example, natural drying, ventilation drying, heat drying etc., can be employ | adopted for a drying process. For example, in the case of heat drying, the drying temperature is typically 20 ° C. to 80 ° C., preferably 25 ° C. to 70 ° C., and the drying time is preferably about 1 minute to 10 minutes. Moreover, the moisture content of the polarizer after drying is preferably 10% to 30% by weight, more preferably 12% to 28% by weight, and still more preferably 16% to 25% by weight. When the moisture content is excessively large, the degree of polarization tends to decrease with drying of the polarizer when the polarizing plate is dried. In particular, the orthogonal transmittance increases in a short wavelength region of 500 nm or less, that is, light of a short wavelength leaks, so that black display tends to be colored blue. On the other hand, if the moisture content of the polarizer is excessively small, problems such as local uneven defects (knic defects) are likely to occur.

<A-2. Adhesive layer>
Any appropriate pressure-sensitive adhesive layer can be adopted as the pressure-sensitive adhesive layer as long as the effects of the present invention are not impaired. Such an adhesive layer includes, for example, an acrylic adhesive layer, a rubber adhesive layer, a vinyl alkyl ether adhesive layer, a silicone adhesive layer, a polyester adhesive layer, a polyamide adhesive layer, and a urethane adhesive. Examples thereof include a pressure-sensitive adhesive layer, a fluorine-based pressure-sensitive adhesive layer, and an epoxy-based pressure-sensitive adhesive layer.

  The pressure-sensitive adhesive layer is formed of a pressure-sensitive adhesive composition. Such a pressure-sensitive adhesive composition may have any form, and examples thereof include an active energy ray curable type, a solvent type (solution type), an emulsion type, and a hot melt type (hot melt type). .

  As the pressure-sensitive adhesive layer, an acrylic pressure-sensitive adhesive layer and a silicone-based pressure-sensitive adhesive layer are preferable from the viewpoint of easy adjustment of the adhesive force, and a silicone containing a silicone-based pressure-sensitive adhesive is more effective in the effects of the present invention. A PSA layer is more preferable.

  The acrylic pressure-sensitive adhesive layer preferably contains 50% by weight or more, more preferably 60% by weight or more, based on the total amount (100% by weight) of the pressure-sensitive adhesive layer as the base polymer.

  The silicone pressure-sensitive adhesive layer preferably contains 50% by weight or more, more preferably 60% by weight or more, based on the total amount of the pressure-sensitive adhesive layer (100% by weight), as the base polymer.

  The silicone pressure-sensitive adhesive layer is formed of a silicone pressure-sensitive adhesive composition. Any appropriate silicone pressure-sensitive adhesive layer can be adopted as the silicone pressure-sensitive adhesive layer as long as the effects of the present invention are not impaired. For example, a silicone-based pressure-sensitive adhesive layer formed from a peroxide-crosslinked silicone pressure-sensitive adhesive composition (peroxide-curable silicone-based pressure-sensitive adhesive composition) or an addition reaction type silicone-based pressure-sensitive adhesive composition is preferably exemplified. More preferred is a silicone-based pressure-sensitive adhesive layer formed from an addition reaction type silicone-based pressure-sensitive adhesive composition.

  As the silicone pressure-sensitive adhesive composition, a phenyl group-containing silicone pressure-sensitive adhesive composition is preferable. Examples of the phenyl group-containing silicone pressure-sensitive adhesive composition include polyalkylphenyl silicone pressure-sensitive adhesive compositions such as a polymethylphenyl silicone-based pressure-sensitive adhesive composition and a polyethylphenyl silicone-based pressure-sensitive adhesive composition.

  The addition reaction type silicone pressure-sensitive adhesive composition is preferably an addition reaction type silicone pressure sensitive adhesive composition (addition reaction type phenyl group-containing silicone pressure sensitive adhesive composition) using an organopolysiloxane having a phenyl group. Examples of the organopolysiloxane having a phenyl group in such an addition reaction type phenyl group-containing silicone pressure-sensitive adhesive composition include polymethylphenylsiloxane (polymethylphenylsilicone) and polyethylphenylsiloxane (polyethylene). And polyalkylphenyl siloxane (polyalkylphenyl silicone) such as ethylphenyl silicone.

  The addition reaction type silicone pressure-sensitive adhesive composition preferably contains a silicone rubber and a silicone resin.

  As the silicone rubber, any appropriate silicone rubber component can be adopted as long as it is a silicone rubber component as long as the effects of the present invention are not impaired. As such a silicone rubber component, a silicone rubber made of an organopolysiloxane having a phenyl group (particularly, an organopolysiloxane having methylphenylsiloxane as a main constituent unit) is preferable. Various functional groups such as vinyl groups may be introduced into the organopolysiloxane in such a silicone rubber, if necessary. The weight average molecular weight of such an organopolysiloxane is preferably 150,000 or more, more preferably 280,000 to 1,000,000, and further preferably 500,000 to 900,000.

As the silicone resin, any appropriate silicone resin can be used as long as it does not impair the effects of the present invention as long as it is a silicone resin used in silicone pressure sensitive adhesives (silicone pressure sensitive adhesives). Can do. Examples of such a silicone-based resin include an M unit composed of the structural unit “R ₃ —Si _1/2 ”, a Q unit composed of the structural unit “SiO ₂ ”, and a structural unit “R—SiO _3/2 ”. And a silicone resin containing an organopolysiloxane made of a (co) polymer having at least one unit selected from a T unit and a D unit consisting of a structural unit “R ₂ —SiO”. In addition, R in the said structural unit shows a hydrocarbon group or a hydroxyl group. Examples of the hydrocarbon group include an aliphatic hydrocarbon group (an alkyl group such as a methyl group and an ethyl group), an alicyclic hydrocarbon group (a cycloalkyl group such as a cyclohexyl group), an aromatic hydrocarbon group ( And allyl groups such as a phenyl group and a naphthyl group). The ratio (ratio) between the “M unit” and “at least one unit selected from Q unit, T unit and D unit” is, for example, the former / the latter (molar ratio) = 0.3 / 1. It is preferable that it is -1.5 / 1 (preferably 0.5 / 1-1.3 / 1).

  Various functional groups such as vinyl groups may be introduced into the organopolysiloxane in the silicone resin, if necessary. The functional group to be introduced may be a functional group capable of causing a crosslinking reaction. The weight average molecular weight of the organopolysiloxane in the silicone resin is preferably 1000 or more, more preferably 1000 to 20000, and further preferably 1500 to 10,000.

  As a blending ratio of the silicone rubber and the silicone resin, any appropriate blending ratio can be adopted as long as the effects of the present invention are not impaired. As such a blending ratio, the silicone resin is preferably 100 parts by weight to 220 parts by weight, and more preferably 120 parts by weight to 180 parts by weight with respect to 100 parts by weight of the silicone rubber.

  In the silicone-based pressure-sensitive adhesive composition containing silicone rubber and silicone resin, the silicone rubber and the silicone resin may be in a mixed state in which the silicone rubber and the silicone resin react with each other. Thus, the condensed state may be a condensate (particularly a partial condensate).

  The silicone-based pressure-sensitive adhesive composition may contain additives such as a crosslinking agent, a filler, a plasticizer, an anti-aging agent, an antistatic agent, and a colorant (pigment, dye, etc.) as necessary. . Moreover, you may contain a catalyst (especially platinum-type catalyst etc.). In addition, only 1 type may be sufficient as an additive, and 2 or more types may be sufficient as it.

  The silicone pressure-sensitive adhesive composition containing silicone rubber and silicone resin preferably contains a crosslinking agent from the viewpoint of obtaining a silicone pressure-sensitive adhesive layer that is a crosslinked structure. As such a crosslinking agent, any appropriate crosslinking agent can be adopted as long as the effects of the present invention are not impaired. Preferred examples of such a crosslinking agent include siloxane-based crosslinking agents (silicone-based crosslinking agents) and peroxide-based crosslinking agents. In addition, only 1 type may be sufficient as a crosslinking agent, and 2 or more types may be sufficient as it.

  Any appropriate siloxane-based crosslinking agent can be adopted as the siloxane-based crosslinking agent as long as the effects of the present invention are not impaired. As such a siloxane-based crosslinking agent, polyorganohydrogensiloxane having two or more hydrogen atoms bonded to silicon atoms in the molecule is preferably exemplified. In such polyorganohydrogensiloxane, various organic groups other than hydrogen atoms may be bonded to silicon atoms to which hydrogen atoms are bonded. Examples of such an organic group include alkyl groups such as a methyl group and an ethyl group; allyl groups such as a phenyl group; and halogenated alkyl groups. Among these, an alkyl group is preferable and a methyl group is more preferable from the viewpoint of ease of synthesis and good handleability. The skeleton structure of the polyorganohydrogensiloxane may have any of a linear, branched, and cyclic skeleton structure, and is preferably a linear structure.

  As a commercial item of a silicone type adhesive composition, a brand name "X-40-3306" (Shin-Etsu Chemical Co., Ltd. make, addition reaction type silicone adhesive composition) etc. are mentioned, for example.

  The acrylic pressure-sensitive adhesive layer contains an acrylic polymer as a base polymer. The acrylic pressure-sensitive adhesive layer is formed of an acrylic pressure-sensitive adhesive composition.

  Any appropriate acrylic polymer can be adopted as the acrylic polymer as long as the effects of the present invention are not impaired. Such an acrylic polymer is preferably a polymer composed of (meth) acrylic acid alkyl ester having a linear or branched alkyl group as a main monomer component. The “(meth) acryl” represents “acryl” and / or “methacryl” (any one or both of “acryl” and “methacryl”), and the same applies to others.

  Examples of (meth) acrylic acid alkyl ester having a linear or branched alkyl group (hereinafter sometimes simply referred to as “(meth) acrylic acid alkyl ester”) include, for example, methyl (meth) acrylate, ( (Meth) ethyl acrylate, (meth) propyl acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, s-butyl (meth) acrylate, (meth) acrylic acid t-butyl, pentyl (meth) acrylate, isopentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, (meth ) Isooctyl acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, (meth Decyl acrylate, isodecyl (meth) acrylate, undecyl (meth) acrylate, dodecyl (meth) acrylate, tridecyl (meth) acrylate, tetradecyl (meth) acrylate, pentadecyl (meth) acrylate, (meth) acrylic (Meth) acrylic acid alkyl esters having 1 to 20 carbon atoms in the alkyl group such as hexadecyl acid, heptadecyl (meth) acrylate, octadecyl (meth) acrylate, nonadecyl (meth) acrylate, eicosyl (meth) acrylate, etc. Is mentioned. In addition, the said (meth) acrylic-acid alkylester may be only 1 type, and 2 or more types may be sufficient as it.

  The (meth) acrylic acid alkyl ester is preferably a (meth) acrylic acid alkyl ester having 2 to 10 carbon atoms in the alkyl group, more preferably n-butyl acrylate (n-BA), acrylic acid 2 -Ethylhexyl (2EHA).

  Arbitrary appropriate content can be employ | adopted for content of the (meth) acrylic-acid alkylester in the range which does not impair the effect of this invention. The content is preferably 40% by weight or more, more preferably 40% by weight, based on the total amount of monomer components constituting the acrylic polymer (total weight, 100% by weight) from the viewpoint of adhesiveness. It is -100 weight%, More preferably, it is 50 weight%-99 weight%.

  The acrylic polymer may contain a copolymerizable monomer as a constituent monomer component in terms of enabling tuning of characteristics, proper use according to the purpose, and imparting a function as necessary. Moreover, only 1 type may be sufficient as a copolymerizable monomer and 2 or more types may be sufficient as it.

  Examples of the copolymerizable monomer include polar group-containing monomers. Examples of polar group-containing monomers include (meth) acrylic acid, itaconic acid, maleic acid, fumaric acid, crotonic acid, isocrotonic acid, and acid anhydrides thereof (for example, acid anhydrides such as maleic anhydride and itaconic anhydride). Carboxyl group-containing monomers such as group-containing monomers; 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate Hydroxyl group-containing monomers such as vinyl alcohol and allyl alcohol; (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methoxymethyl (meth) acrylamide, N- Butoxymethyl (meth) acrylamide, An amide group-containing monomer such as hydroxyethyl (meth) acrylamide; an amino group-containing monomer such as aminoethyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, t-butylaminoethyl (meth) acrylate; ) Epoxy group-containing monomers such as glycidyl acrylate and methyl glycidyl (meth) acrylate; Cyano group-containing monomers such as acrylonitrile and methacrylonitrile; N-vinyl-2-pyrrolidone, (meth) acryloylmorpholine, N-vinylpiperidone, N -Heterocyclic ring-containing vinyl monomers such as vinyl piperazine, N-vinyl pyrrole, N-vinyl imidazole, vinyl pyridine, vinyl pyrimidine, vinyl oxazole; sulfonic acid group-containing monomers such as sodium vinyl sulfonate; B carboxyethyl acryloyl phosphate such as phosphoric acid group-containing monomer; cyclohexyl maleimide, imide group-containing monomers such as isopropyl maleimide; an isocyanate group-containing monomers such as 2-methacryloyloxyethyl isocyanate. Such a polar group-containing monomer may be only one kind or two or more kinds.

  The polar group-containing monomer is preferably a carboxyl group-containing monomer or a hydroxyl group-containing monomer, and more preferably acrylic acid, 4-hydroxybutyl acrylate, or 2-hydroxyethyl acrylate.

  Arbitrary appropriate content can be employ | adopted for content of a polar group containing monomer in the range which does not impair the effect of this invention. The content is preferably 1% by weight to 20% by weight, more preferably 1% by weight to 15% by weight, with respect to the total amount of monomer components (100% by weight) constituting the acrylic polymer. .

  A polyfunctional monomer is also mentioned as a copolymerizable monomer. A polyfunctional monomer means a monomer having two or more ethylenically unsaturated groups in one molecule. Any appropriate ethylenically unsaturated group can be adopted as the ethylenically unsaturated group as long as the effects of the present invention are not impaired. Examples of such ethylenically unsaturated groups include radical polymerizable functional groups such as vinyl group, propenyl group, isopropenyl group, vinyl ether group (vinyloxy group), and allyl ether group (allyloxy group).

  Examples of the multifunctional monomer include hexanediol di (meth) acrylate, butanediol di (meth) acrylate, (poly) ethylene glycol di (meth) acrylate, (poly) propylene glycol di (meth) acrylate, and neopentyl glycol. Di (meth) acrylate, pentaerythritol di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, trimethylolpropane tri (meth) acrylate, tetramethylolmethane tri (meth) acrylate, allyl Examples include (meth) acrylate, vinyl (meth) acrylate, divinylbenzene, epoxy acrylate, polyester acrylate, and urethane acrylate. Such polyfunctional monomers may be used alone or in combination of two or more.

  Examples of the copolymerizable monomer include (meth) acrylic acid alkoxyalkyl ester [alkoxyalkyl (meth) acrylate]. Examples of the (meth) acrylic acid alkoxyalkyl ester include 2-methoxyethyl (meth) acrylate, 2-ethoxyethyl (meth) acrylate, methoxytriethylene glycol (meth) acrylate, and (meth) acrylic acid 3- Examples include methoxypropyl, 3-ethoxypropyl (meth) acrylate, 4-methoxybutyl (meth) acrylate, 4-ethoxybutyl (meth) acrylate, and the like. Only one (meth) acrylic acid alkoxyalkyl ester may be used, or two or more types may be used.

  As copolymerizable monomers, in addition to polar group-containing monomers, polyfunctional monomers, (meth) acrylic acid alkoxyalkyl esters, for example, cyclopentyl (meth) acrylate, cyclohexyl (meth) acrylate, isobornyl (meth) acrylate, etc. (Meth) acrylic acid ester having an alicyclic hydrocarbon group, and (meth) acrylic acid ester having an aromatic hydrocarbon group such as phenyl (meth) acrylate, phenoxyethyl (meth) acrylate, and benzyl (meth) acrylate (Meth) acrylic acid alkyl esters such as polar group-containing monomers, polyfunctional monomers, (meth) acrylic acid esters other than (meth) acrylic acid alkoxyalkyl esters; vinyl esters such as vinyl acetate and vinyl propionate ;styrene, Aromatic vinyl compounds such as Nirutoruen; vinyl ethers such as vinyl alkyl ethers; ethylene, butadiene, isoprene, olefins or dienes such as isobutylene and the like; vinyl chloride.

  The acrylic polymer can be obtained by polymerizing the monomer component by any appropriate polymerization method such as a known and usual polymerization method. Examples of such polymerization method include solution polymerization method, emulsion polymerization method, bulk polymerization method, polymerization method by active energy ray irradiation (active energy ray polymerization method), and the like. Among these polymerization methods, a solution polymerization method and an active energy ray polymerization method are preferable in terms of transparency, water resistance, cost, and the like.

  In forming the acrylic polymer, a polymerization initiator such as a thermal polymerization initiator or a photopolymerization initiator (photoinitiator) can be used depending on the type of polymerization reaction. Only one polymerization initiator may be used, or two or more polymerization initiators may be used.

  The thermal polymerization initiator is preferably used when an acrylic polymer is obtained by solution polymerization. Examples of such thermal polymerization initiators include azo initiators, peroxide polymerization initiators (eg, dibenzoyl peroxide, tert-butyl permaleate), and redox polymerization initiators. Of these thermal polymerization initiators, the azo initiators disclosed in JP-A No. 2002-69411 are particularly preferable. Such an azo initiator is preferable in that the decomposition product of the initiator hardly remains in the acrylic polymer as a part that causes generation of a heat generation gas (outgas). Examples of the azo initiator include 2,2′-azobisisobutyronitrile (hereinafter sometimes referred to as AIBN) and 2,2′-azobis-2-methylbutyronitrile (hereinafter sometimes referred to as AMBN). And 2,2′-azobis (2-methylpropionic acid) dimethyl, 4,4′-azobis-4-cyanovaleric acid, and the like. The amount of the azo initiator used is preferably 0.05 to 0.5 parts by weight, more preferably 0.1 parts by weight with respect to the total amount (100 parts by weight) of monomer components constituting the acrylic polymer. Parts to 0.3 parts by weight.

  The photopolymerization initiator is used particularly when an acrylic polymer is obtained by active energy ray polymerization. Examples of the photopolymerization initiator include a benzoin ether photopolymerization initiator, an acetophenone photopolymerization initiator, an α-ketol photopolymerization initiator, an aromatic sulfonyl chloride photopolymerization initiator, and a photoactive oxime photopolymerization initiator. Agents, benzoin photopolymerization initiators, benzyl photopolymerization initiators, benzophenone photopolymerization initiators, ketal photopolymerization initiators, thioxanthone photopolymerization initiators, and the like.

  Examples of the benzoin ether photopolymerization initiator include benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2,2-dimethoxy-1,2-diphenylethane-1-one, and anisole. Examples include methyl ether. Examples of the acetophenone photopolymerization initiator include 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexyl phenyl ketone, 4-phenoxydichloroacetophenone, and 4- (t-butyl). Examples include dichloroacetophenone. Examples of the α-ketol photopolymerization initiator include 2-methyl-2-hydroxypropiophenone and 1- [4- (2-hydroxyethyl) phenyl] -2-methylpropan-1-one. . Examples of the aromatic sulfonyl chloride photopolymerization initiator include 2-naphthalenesulfonyl chloride. Examples of the photoactive oxime photopolymerization initiator include 1-phenyl-1,1-propanedione-2- (o-ethoxycarbonyl) -oxime. Examples of the benzoin photopolymerization initiator include benzoin. Examples of the benzyl photopolymerization initiator include benzyl. Examples of the benzophenone photopolymerization initiator include benzophenone, benzoylbenzoic acid, 3,3′-dimethyl-4-methoxybenzophenone, polyvinylbenzophenone, α-hydroxycyclohexyl phenyl ketone, and the like. Examples of the ketal photopolymerization initiator include benzyl dimethyl ketal. Examples of the thioxanthone photopolymerization initiator include thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-diisopropylthioxanthone, dodecylthioxanthone, and the like.

  Arbitrary appropriate usage-amounts can be employ | adopted for the usage-amount of a photoinitiator in the range which does not impair the effect of this invention. The amount used is preferably 0.01 parts by weight to 0.2 parts by weight, more preferably 0.05 parts by weight with respect to the total amount (100 parts by weight) of monomer components constituting the acrylic polymer. ~ 0.15 parts by weight.

  The acrylic pressure-sensitive adhesive composition may contain a crosslinking agent. By using a crosslinking agent, the acrylic polymer in the acrylic pressure-sensitive adhesive layer can be cross-linked, and the cohesive force of the acrylic pressure-sensitive adhesive layer can be improved. In addition, only 1 type may be sufficient as a crosslinking agent, and 2 or more types may be sufficient as it.

  Examples of the crosslinking agent include an isocyanate crosslinking agent, an epoxy crosslinking agent, a melamine crosslinking agent, a peroxide crosslinking agent, a urea crosslinking agent, a metal alkoxide crosslinking agent, a metal chelate crosslinking agent, and a metal salt crosslinking agent. Agents, carbodiimide crosslinking agents, oxazoline crosslinking agents, aziridine crosslinking agents, amine crosslinking agents and the like. Among these crosslinking agents, isocyanate crosslinking agents and epoxy crosslinking agents are preferable.

  Examples of the isocyanate crosslinking agent (polyfunctional isocyanate compound) include lower aliphatic polyisocyanates such as 1,2-ethylene diisocyanate, 1,4-butylene diisocyanate, and 1,6-hexamethylene diisocyanate; cyclopentylene diisocyanate, Cycloaliphatic polyisocyanates such as cyclohexylene diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated xylene diisocyanate; 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 4,4′-diphenylmethane diisocyanate, And aromatic polyisocyanates such as xylylene diisocyanate. Examples of the isocyanate-based crosslinking agent include trimethylolpropane / tolylene diisocyanate adduct (manufactured by Nippon Polyurethane Industry Co., Ltd., trade name “Coronate L”), trimethylolpropane / hexamethylene diisocyanate adduct (manufactured by Nippon Polyurethane Industry Co., Ltd.). , Trade name "Coronate HL"), trade name "Coronate HX" (Nippon Polyurethane Industry Co., Ltd.), trimethylolpropane / xylylene diisocyanate adduct (Mitsui Chemicals, trade name "Takenate 110N") Also mentioned.

  Examples of the epoxy crosslinking agent (polyfunctional epoxy compound) include N, N, N ′, N′-tetraglycidyl-m-xylenediamine, diglycidylaniline, and 1,3-bis (N, N-diglycidylamino). Methyl) cyclohexane, 1,6-hexanediol diglycidyl ether, neopentyl glycol diglycidyl ether, ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, sorbitol polyglycidyl ether, Glycerol polyglycidyl ether, pentaerythritol polyglycidyl ether, polyglycerol polyglycidyl ether, sorbitan polyglycidyl ether, trimethylo In addition to lepropane polyglycidyl ether, adipic acid diglycidyl ester, o-phthalic acid diglycidyl ester, triglycidyl-tris (2-hydroxyethyl) isocyanurate, resorcin diglycidyl ether, bisphenol-S-diglycidyl ether, intramolecular And an epoxy resin having two or more epoxy groups. As an epoxy type crosslinking agent, commercial items, such as a brand name "Tetrad C" (made by Mitsubishi Gas Chemical Co., Ltd.), are also mentioned.

  Arbitrary appropriate content can be employ | adopted for content of the crosslinking agent in an acrylic adhesive composition in the range which does not impair the effect of this invention. Such content is, for example, preferably 0.001 to 15 parts by weight, more preferably 0.01 parts by weight with respect to the total amount of monomer components (100 parts by weight) constituting the acrylic polymer. ~ 12 parts by weight.

  In addition to the crosslinking agent, the acrylic pressure-sensitive adhesive composition includes a crosslinking accelerator, a silane coupling agent, a tackifying resin (rosin derivative, polyterpene resin, petroleum resin, oil-soluble phenol, etc.) and anti-aging as necessary. Any appropriate additions such as additives, fillers, colorants (pigments, dyes, etc.), UV absorbers, antioxidants, chain transfer agents, plasticizers, softeners, surfactants, antistatic agents, stabilizers, etc. An agent may be contained within a range not impairing the effects of the present invention.

The pressure-sensitive adhesive layer can be obtained by any appropriate forming method. For example, the silicone-based pressure-sensitive adhesive layer can be obtained by applying (coating) a silicone-based pressure-sensitive adhesive composition on any appropriate base material layer, followed by drying by heating and curing. Moreover, an acrylic adhesive layer can be obtained by methods, such as the following (1) or (2), for example.
(1) An acrylic pressure-sensitive adhesive composition containing an acrylic monomer mixture or a partial polymer thereof and, if necessary, an additive such as a photopolymerization initiator or a crosslinking agent, is applied on any appropriate substrate layer (coating And irradiating with active energy rays and curing to form an acrylic pressure-sensitive adhesive layer.
(2) An acrylic pressure-sensitive adhesive composition (solution) containing an acrylic polymer, a solvent, and optionally additives such as a crosslinking agent is applied (coated) on any appropriate substrate layer, dried and And / or cured to form an acrylic adhesive layer.

  When producing the pressure-sensitive adhesive layer, a drying step may be further provided as necessary. You may produce an adhesive layer by transferring the adhesive layer produced previously on arbitrary appropriate base material layers.

  Any appropriate coating method can be used for application (coating) of the pressure-sensitive adhesive composition. For example, it can apply | coat using a conventional coater (A gravure roll coater, a reverse roll coater, a kiss roll coater, a dip roll coater, a bar coater, a knife coater, a spray coater, a comma coater, a direct coater etc.).

<A-3. Separator>
The separator is attached to the surface of the pressure-sensitive adhesive layer. Such separators include plastic films composed of polyester resins such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT); polyethylene (PE), polypropylene (PP), polymethyl Plastic film composed of olefin resin containing α-olefin as monomer component such as pentene (PMP), ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA); composed of polyvinyl chloride (PVC) Plastic film; plastic film composed of vinyl acetate resin; plastic film composed of polycarbonate (PC); plastic composed of polyphenylene sulfide (PPS) Film; plastic film composed of amide resin such as polyamide (nylon), wholly aromatic polyamide (aramid); plastic film composed of polyimide resin; plastic film composed of polyetheretherketone (PEEK); Plastic films composed of olefin resins such as polyethylene (PE) and polypropylene (PP); polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl fluoride, polyvinylidene fluoride, tetrafluoroethylene-hexafluoropropylene copolymer And a plastic film composed of a fluorine-based resin such as chlorofluoroethylene-vinylidene fluoride copolymer.

  Examples of the separator include a separator having a release layer (release treatment layer) on at least one surface thereof, a low adhesive separator made of a fluorine-based polymer, and a low adhesive separator made of a nonpolar polymer. Moreover, the separator base material (namely, separator base material itself) which does not have a peeling layer is also mentioned. Examples of the fluoropolymer include polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl fluoride, polyvinylidene fluoride, tetrafluoroethylene-hexafluoropropylene copolymer, and chlorofluoroethylene-vinylidene fluoride copolymer. Can be mentioned. Examples of nonpolar polymers include olefinic resins such as polyethylene (PE) and polypropylene (PP). Among these, a separator having a release layer on at least one surface of the separator substrate and a separator substrate having no release layer (that is, the separator substrate itself) are preferable.

  As a separator base material, a plastic film etc. are mentioned, for example. Examples of such plastic films include plastic films composed of polyester resins such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polybutylene terephthalate (PBT); polyethylene (PE) and polypropylene (PP) Plastic film composed of an olefin-based resin containing α-olefin as a monomer component such as polymethylpentene (PMP), ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA); Plastic film composed of vinyl acetate resin; plastic film composed of polycarbonate (PC); composed of polyphenylene sulfide (PPS) Plastic film composed of amide resins such as polyamide (nylon) and wholly aromatic polyamide (aramid); Plastic film composed of polyimide resin; composed of polyetheretherketone (PEEK) Plastic film; and the like. Among these, from the viewpoints of processability, availability, workability, dust resistance, cost, and the like, a plastic film formed from a polyester resin is preferable, and a polyethylene terephthalate (PET) film is more preferable.

  Examples of the release treatment agent constituting the release layer include release treatment agents such as silicone release treatment agents, fluorine release treatment agents, long-chain alkyl release treatment agents, and molybdenum sulfide. Among these release treatment agents, a silicone release treatment agent is preferable from the viewpoint of release control and stability over time. Note that only one type of release treatment agent may be used, or two or more types may be used.

  The separator preferably has an antistatic layer on the surface side of the pressure-sensitive adhesive layer. When the separator has an antistatic layer on the surface side of the pressure-sensitive adhesive layer, an antistatic effect is exhibited in the separator.

  Examples of the antistatic layer include layers formed by incorporating various antistatic components into various resins. Examples of the resin include thermosetting resins, ultraviolet curable resins, electron beam curable resins, and two-component mixtures. Various types of resins such as mold resins can be employed. Examples of the antistatic component include organic or inorganic conductive substances and various antistatic agents. As the organic conductive substance, various conductive polymers can be preferably employed. Examples of such conductive polymers include polyaniline, polypyrrole, polythiophene, polyethyleneimine, and allylamine polymers. Such a conductive polymer may be only one kind or two or more kinds. Moreover, you may use in combination with another antistatic component (an inorganic electroconductive substance, an antistatic agent, etc.). Examples of inorganic conductive materials include tin oxide, antimony oxide, indium oxide, cadmium oxide, titanium oxide, zinc oxide, indium, tin, antimony, gold, silver, copper, aluminum, nickel, chromium, titanium, iron, cobalt , Copper iodide, and fine particles composed of alloys or mixtures thereof. Further, as the inorganic conductive material, fine particles such as ITO (indium oxide / tin oxide), ATO (antimony oxide / tin oxide), etc. may be used. The average particle size of such fine particles is usually preferably about 0.1 μm or less (typically 0.01 μm to 0.1 μm). Such an inorganic conductive material (inorganic conductive material) may be one kind or two or more kinds. Moreover, you may use in combination with another antistatic component. Examples of antistatic agents include cationic antistatic agents, anionic antistatic agents, amphoteric ionic antistatic agents, nonionic antistatic agents, and such cationic, anionic and zwitterionic ion conductive groups. And an ion conductive polymer obtained by polymerization or copolymerization of a monomer having a hydrogen atom. Such an antistatic agent may be only one kind or two or more kinds. Moreover, you may use in combination with another antistatic component.

  In general, in a functional film with a pressure-sensitive adhesive layer provided with a separator on the surface of the pressure-sensitive adhesive layer, the separator is peeled off from the surface of the pressure-sensitive adhesive layer when sticking to a sticking surface (such as a transparent substrate), There is a problem that peeling of the separator causes charging and the surface of the pressure-sensitive adhesive layer is charged. However, in the first functional film with the pressure-sensitive adhesive layer of the present invention, when the separator is peeled off from the surface of the pressure-sensitive adhesive layer when sticking to the sticking surface (transparent substrate or the like), surprisingly, the separator An antistatic effect is exhibited both on the side and on the surface side of the pressure-sensitive adhesive layer, and peeling charge can be effectively suppressed.

<A-4. Production of Functional Film with First Adhesive Layer>
The 1st functional film with an adhesive layer of this invention can be manufactured by arbitrary appropriate methods. As such a method, for example,
(1) A method of applying the adhesive layer forming material solution or hot melt on the functional film, or applying the adhesive layer forming material solution or hot melt to the base material layer. A method of attaching a functional film to the back,
(2) A method of transferring the pressure-sensitive adhesive layer applied and formed on the separator onto the functional film according to the method of (1) above,
(3) A method of forming and applying the forming material of the pressure-sensitive adhesive layer onto the functional film, or a method of extruding the base material layer and bonding the functional film to the back surface of the base material,
(4) A method in which the base material layer and the pressure-sensitive adhesive layer are extruded in two layers or multiple layers, and a functional film is bonded to the back surface of the base material,
(5) A method of laminating a pressure-sensitive adhesive layer on a functional film, or a method of laminating a pressure-sensitive adhesive layer together with a separator,
(6) A method of laminating a pressure-sensitive adhesive layer and a functional film layer-forming material such as a functional film or a separator in two layers or multilayers,
Etc.

≪B. Second functional film with pressure-sensitive adhesive layer of the present invention >>
Another preferred embodiment of the functional film with a pressure-sensitive adhesive layer of the present invention (sometimes referred to as the second functional film with a pressure-sensitive adhesive layer of the present invention) is a functional film composed of one or more layers, The pressure-sensitive adhesive layer is included in this order, and the pressure-sensitive adhesive layer is the outermost layer.

  The 2nd functional film with an adhesive layer of this invention contains the functional film which consists of 1 layer or more, and an adhesive layer in this order, and if this adhesive layer is the outermost layer, the effect of this invention is not impaired. Any other suitable member may be included within the scope. The functional film with a second pressure-sensitive adhesive layer of the present invention is preferably formed by laminating a functional film composed of one or more layers and a pressure-sensitive adhesive layer in this order.

  An example of a schematic cross-sectional view of the second functional film with an adhesive layer of the present invention is shown in FIG. As shown in FIG. 2, the 2nd functional film 200 with an adhesive layer of this invention, Preferably, the functional film 10 and adhesive layer 20 which consist of 1 layer or more are laminated | stacked in this order.

  About the thickness of the film which consists of 1 layer or more, and the thickness of an adhesive layer, << A. The description in the first functional film with pressure-sensitive adhesive layer >> of the present invention is incorporated.

  In the second functional film with a pressure-sensitive adhesive layer of the present invention, the surface voltage of the pressure-sensitive adhesive layer is preferably less than 1.0 kV, more preferably 0 kV to 1 kV, and still more preferably 0 kV to 0. 9 kV, particularly preferably 0 kV to 0.8 kV, and most preferably 0 kV to 0.7 kV. In the second functional film with a pressure-sensitive adhesive layer of the present invention, a functional film with a pressure-sensitive adhesive layer that suppresses the charge on the surface of the pressure-sensitive adhesive layer is obtained when the charged voltage on the surface of the pressure-sensitive adhesive layer falls within the above range. Can be provided.

In the second functional film with a pressure-sensitive adhesive layer of the present invention, the wetting speed of the surface of the pressure-sensitive adhesive layer with respect to the glass plate is preferably 5 cm ² / second or more, more preferably 7 cm ² / second or more, It is preferably 9 cm ² / second or more, particularly preferably 10 cm ² / second or more, and most preferably 11 cm ² / second or more. In the 2nd functional film with an adhesive layer of this invention, when the wetting speed with respect to the acrylic board of the surface of an adhesive layer is settled in the said range, the adhesiveness in the 2nd functional film with an adhesive layer of this invention The agent layer can express good wettability, and workability and the like when sticking to a sticking surface (such as a transparent substrate) can be improved.

  As for the 2nd functional film with an adhesive layer of this invention, the adhesive force with respect to the glass plate of the surface of an adhesive layer becomes like this. Preferably it is 1.0N / 25mm-0.005N / 25mm, More preferably, it is 0.75N. / 25 mm to 0.0075 N / 25 mm, more preferably 0.50 N / 25 mm to 0.01 N / 25 mm, and particularly preferably 0.30 N / 25 mm to 0.015 N / 25 mm. In the 2nd functional film with an adhesive layer of this invention, when the adhesive force with respect to the glass plate of the surface of an adhesive layer is settled in the said range, the adhesiveness in the 2nd functional film with an adhesive layer of this invention Since the agent layer has a relatively light adhesive force, it can exhibit excellent reworkability. Furthermore, even if air bubbles are mixed, the air bubbles can be pushed out with a hand or a roller. Conversely, if the adhesive strength is too light, the bonded functional film may be peeled off.

  The second functional film with a pressure-sensitive adhesive layer of the present invention preferably has a pressure-sensitive adhesive force on the glass plate after heat treatment at 50 ° C. for 2 weeks on the surface of the pressure-sensitive adhesive layer, preferably 1.0 N / 25 mm to 0.005 N. / 25 mm, more preferably 0.75 N / 25 mm to 0.0075 N / 25 mm, still more preferably 0.50 N / 25 mm to 0.01 N / 25 mm, and particularly preferably 0.30 N / 25 mm to 0.005. 015 N / 25 mm. In the 2nd functional film with an adhesive layer of this invention, when the adhesive force with respect to a glass plate after heat-processing the surface of an adhesive layer for 2 weeks at 50 degreeC is settled in the said range, 1st of this invention. Since the pressure-sensitive adhesive layer in the functional film with pressure-sensitive adhesive layer 2 has a relatively light adhesive force even after a long time, it can exhibit excellent removability after a long time.

<Functional film consisting of B-1.1 layers or more>
The description in <functional film consisting of A-1.1 layers or more> is incorporated.

<B-2. Adhesive layer>
The pressure-sensitive adhesive layer possessed by the second functional film with a pressure-sensitive adhesive layer of the present invention is <A-2. Except that an antistatic agent is present on at least a part of the surface of the pressure-sensitive adhesive layer. The explanation in the pressure-sensitive adhesive layer> is incorporated.

  In the pressure-sensitive adhesive layer of the second functional film with a pressure-sensitive adhesive layer of the present invention, an antistatic agent is present on at least part of the surface of the pressure-sensitive adhesive layer. As described above, the presence of the antistatic agent on at least a part of the surface of the pressure-sensitive adhesive layer can provide a functional film with a pressure-sensitive adhesive layer in which charging of the surface of the pressure-sensitive adhesive layer is suppressed.

  “An antistatic agent is present on at least a part of the surface of the pressure-sensitive adhesive layer” means that the antistatic agent may be present only on a part of the surface of the pressure-sensitive adhesive layer, or the surface of the pressure-sensitive adhesive layer. This means that an antistatic agent may be present in all of the above. “Antistatic agent is present” means that the antistatic agent may be present as an antistatic layer, or the antistatic agent does not form a layer (for example, particulate, indefinite shape, powder) , Semi-liquid form, gel form, etc.).

  The size of the antistatic agent present on at least a part of the surface of the pressure-sensitive adhesive layer of the second functional film with the pressure-sensitive adhesive layer of the present invention is its shape (layered, particulate, irregular, powdery). , Semi-liquid, gel, etc.), any suitable size can be taken. As such a size, the thickness is preferably 0.001 μm to 1 μm, more preferably 0.001 μm to 0.5 μm, still more preferably 0.001 μm to 0.1 μm, and particularly preferably 0.001 μm to 0.05 μm.

  The antistatic agent present on at least a part of the surface of the pressure-sensitive adhesive layer possessed by the second functional film with the pressure-sensitive adhesive layer of the present invention may be any appropriate charge as long as the effects of the present invention are not impaired. An inhibitor may be employed. Examples of such antistatic agents include organic or inorganic conductive substances and various antistatic agents. As the organic conductive substance, various conductive polymers can be preferably employed. Examples of such conductive polymers include polyaniline, polypyrrole, polythiophene, polyethyleneimine, and allylamine polymers. Such a conductive polymer may be only one kind or two or more kinds. Moreover, you may use in combination with another antistatic component (an inorganic electroconductive substance, an antistatic agent, etc.). Examples of the inorganic conductive substance include tin oxide, antimony oxide, indium oxide, cadmium oxide, titanium oxide, zinc oxide, indium, tin, antimony, gold, silver, copper, aluminum, nickel, chromium, titanium, iron, cobalt , Copper iodide, and fine particles composed of alloys or mixtures thereof. Further, as the inorganic conductive material, fine particles such as ITO (indium oxide / tin oxide), ATO (antimony oxide / tin oxide), etc. may be used. The average particle size of such fine particles is usually preferably about 0.1 μm or less (typically 0.01 μm to 0.1 μm). Such an inorganic conductive material (inorganic conductive material) may be one kind or two or more kinds. Moreover, you may use in combination with another antistatic component. A cationic antistatic agent, an anionic antistatic agent, an amphoteric ion antistatic agent, a nonionic antistatic agent, or a monomer having such a cationic, anionic or zwitterionic ion conductive group is polymerized or Examples also include an ion conductive polymer obtained by copolymerization. Such an antistatic agent may be only one kind or two or more kinds. Moreover, you may use in combination with another antistatic component.

The pressure-sensitive adhesive layer of the second functional film with a pressure-sensitive adhesive layer of the present invention can be formed by any appropriate method as long as the effects of the present invention are not impaired. As such a method, for example, << A. The separator can be peeled off from the first functional film with the pressure-sensitive adhesive layer described in the first functional film with pressure-sensitive adhesive layer of the present invention >>. In this case, <A-3. Separator>
In the above, as described as a preferred embodiment, an antistatic layer is provided on the surface side of the pressure-sensitive adhesive layer of the separator. For the antistatic layer, <A-3. The explanation in Separator> is incorporated.

<B-3. Production of second functional film with pressure-sensitive adhesive layer>
The 2nd functional film with an adhesive layer of this invention can be manufactured by arbitrary appropriate methods. For example, it can be manufactured by peeling the separator from the first functional film with the pressure-sensitive adhesive layer of the present invention comprising a separator having an antistatic layer on the surface side of the pressure-sensitive adhesive layer.

≪C. Film set >>
The film set of the present invention is a functional film with a pressure-sensitive adhesive layer of the present invention used for placing on one side of a transparent substrate, and a low reflection film used for placing on the other side of the transparent substrate. Including. In this case, as the functional film with an adhesive layer of the present invention, << A. The first functional film with an adhesive layer of the present invention described in the first functional film with an adhesive layer of the present invention may be used, or << B. The 2nd functional film with an adhesive layer of this invention demonstrated by the 2nd functional film with an adhesive layer of this invention >> may be sufficient. The film set of the present invention has a transparent substrate by disposing the functional film with the pressure-sensitive adhesive layer of the present invention on one side of the transparent substrate and disposing a low reflection film on the other side of the transparent substrate. When viewed from the low reflection film side of the material, it is very excellent in visibility.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples at all. In addition, the test and evaluation method in an Example etc. are as follows. Note that “parts” means “parts by weight” unless otherwise noted, and “%” means “% by weight” unless otherwise noted.

<Evaluation of wettability>
The created sample was cut into a width of 25 mm and a length of 100 mm to obtain an evaluation sample. Use a glass plate as the adherend, peel off the separator of the evaluation sample, fix one end of the width side to the adherend, lift the end of the unfixed width side, release the hand, and get wet 100 mm The time to spread was measured. (Unit: s / 25 mm × 100 mm). Then, the unit was converted into cm2 / s and the wetting speed was calculated.

<Evaluation of foreign matter biting property>
Micropearl SP-230 (30 μm particles, Sekisui Chemical Co., Ltd.) is dispersed on a glass so that the particles do not agglomerate so as to be about 1 per 1 cm ² as a single particle. The sample separator cut to a thickness of 50 mm was peeled off and bonded using a laminator at a pressure of 0.5 MPa. Next, after being left for 5 minutes in an atmosphere of a temperature of 23 ° C. and a humidity of 50% RH, using a digital microscope (trade name “VH-500” manufactured by Keyence Corporation), the Micropearl SP-230 is the starting point. The diameter of the generated bubbles was measured. Evaluation was made according to the following criteria.
○: Bubble diameter is 200μ or less ×: Bubble diameter is 200μ or more

<Adhesion to glass plate>
The created sample was cut into a width of 25 mm and a length of 150 mm to obtain a sample for evaluation. In an atmosphere of a temperature of 23 ° C. and a humidity of 50% RH, the pressure-sensitive adhesive layer surface of the sample for evaluation was attached to a glass plate by one reciprocating 2.0 kg roller. After curing for 30 minutes in an atmosphere of a temperature of 23 ° C. and a humidity of 50% RH, peeling is performed at a peeling angle of 180 degrees and a pulling speed of 300 mm / min using a universal tensile tester (manufactured by Minebea Co., Ltd., product name: TCM-1kNB). The adhesive strength was measured.

<Adhesive strength to glass plate after heat treatment at 50 ° C. for 2 weeks>
The created sample was cut into a width of 25 mm and a length of 150 mm to obtain a sample for evaluation. In an atmosphere of a temperature of 23 ° C. and a humidity of 50% RH, the pressure-sensitive adhesive layer surface of the sample for evaluation was attached to a glass plate by one reciprocating 2.0 kg roller. Then, after heat treatment at a temperature of 50 ° C. for 2 weeks, it was cured for 30 minutes in an atmosphere of a temperature of 23 ° C. and a humidity of 50% RH, and using a universal tensile testing machine (product name: TCM-1kNB, manufactured by Minebea Co., Ltd.) Peeling was performed at a peeling angle of 180 degrees and a pulling speed of 300 mm / min, and the adhesive strength was measured.

<Measurement of peeling voltage>
The functional film with the pressure-sensitive adhesive layer is cut into a width of 70 mm and a length of 130 mm and left at 23 ° C. × 50% RH for one day, and then the end of the separator is fixed to an automatic winder, and the peeling angle is 150 degrees. Peeling was performed so that the peeling speed was 10 m / min. The potential of the surface of the pressure-sensitive adhesive layer generated at this time was measured with a potential measuring machine (DZ4, manufactured by Sisid Electric Co., Ltd.) fixed at a position 10 cm away from the functional film with the pressure-sensitive adhesive layer. This measurement was performed in an environment of 23 ° C. × 50% RH.

[Production Example 1]
Addition reaction type silicone pressure sensitive adhesive (trade name “X-40-3306”, manufactured by Shin-Etsu Chemical Co., Ltd.): 100 parts by weight and platinum-based catalyst (trade name “CAT-PL-50T”, manufactured by Shin-Etsu Chemical Co., Ltd.) ): 0.2 parts by weight were mixed, and ethyl acetate was added so that the solid content of the prepared solution was 35%, to obtain a silicone-based pressure-sensitive adhesive composition.

[Production Example 2]
In a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen gas inlet tube, and a condenser, 2-ethylhexyl acrylate (manufactured by Nippon Shokubai Co., Ltd.): 100 parts by weight, 4-hydroxybutyl acrylate (Osaka Organic Chemical Industry Co., Ltd.): 10 parts by weight, acrylic acid (manufactured by Toa Gosei Co., Ltd.): 0.02 parts by weight, 2,2′-azobisisobutyronitrile (manufactured by Wako Pure Chemical Industries, Ltd.): 0.2 parts by weight as a polymerization initiator, 192 parts by weight of ethyl acetate was charged, nitrogen gas was introduced while gently stirring, and the polymerization temperature was kept at around 60 ° C. for 8 hours to carry out a polymerization reaction to obtain a solution of acrylic polymer (A) (solid content) 36% by weight) was prepared. The weight average molecular weight of the acrylic polymer (A) in the acrylic polymer (A) solution was 650,000.

[Production Example 3]
Trimethylolpropane / tolylene diisocyanate (Nippon Polyurethane Industry Co., Ltd.) as a cross-linking agent with respect to 100 parts by weight of the solid content of the acrylic polymer (A) was added to the solution of the acrylic polymer (A) obtained in Production Example 2. Manufactured by Coronate HX), 5 parts by weight in terms of solid content, and 0.02 parts by weight of dibutyltin dilaurate (manufactured by Tokyo Fine Chemical Co., Ltd.) as a cross-linking catalyst, and the solid content of the prepared solution is 25%. Thus, ethyl acetate was added and mixed and stirred to prepare an acrylic pressure-sensitive adhesive composition.

[Production Example 4]
"X-40-3229" (manufactured by Shin-Etsu Chemical Co., Ltd.): 100 parts by weight and platinum-based catalyst (trade name "CAT-PL-50T", manufactured by Shin-Etsu Chemical Co., Ltd.): 0.2 parts by weight was mixed, and ethyl acetate was added so that the solid content of the prepared solution was 35% by weight, to obtain a silicone-based pressure-sensitive adhesive composition.

[Example 1]
The silicone pressure-sensitive adhesive composition obtained in Production Example 1 was applied to the silicone-treated surface of a base material “MRF-38” (thickness 38 μm, manufactured by Mitsubishi Plastics, Inc.) made of a polyester resin treated with silicone, It was dried for 3 minutes to form an adhesive layer having a thickness of 75 μm. Then, as a separator, a film “Diafoil T100G” (thickness 38 μm, manufactured by Mitsubishi Plastics) made of an antistatic polyester resin is bonded so that the antistatic surface is on the surface side of the adhesive layer. A film (1) was obtained.
Furthermore, the release liner of the polarizing plate (SEG1224DUARC150T, manufactured by Nitto Denko Co., Ltd.) whose surface has been subjected to antireflection treatment is peeled off, and bonded to the back surface of the base material of the adhesive film (1), and the functional film (1) with the adhesive layer is attached. Obtained.
The results are shown in Table 1.

[Example 2]
The separator was peeled off from the functional film with pressure-sensitive adhesive layer (1) obtained in Example 1 to obtain a functional film with pressure-sensitive adhesive layer (2) having no separator.
The analysis by TOF-SIMS revealed that the antistatic agent was present at least partially on the surface of the pressure-sensitive adhesive layer of the functional film with pressure-sensitive adhesive layer (2).
The results are shown in Table 1.

Example 3
A functional film (3) with an adhesive layer was obtained in the same manner as in Example 1 except that “Lumirror S10” (thickness 38 μm, manufactured by Toray Industries, Inc.) was used as a separator.
The results are shown in Table 1.

Example 4
A functional film (4) with an adhesive layer was obtained in the same manner as in Example 1 except that the thickness of the adhesive layer was 150 μm.
The results are shown in Table 1.

Example 5
A functional film (5) with an adhesive layer was obtained in the same manner as in Example 1 except that the silicone-based adhesive composition obtained in Production Example 4 was used.
Example 6
Except that the separator “Diafoil T100G” (thickness 38 μm, manufactured by Mitsubishi Plastics Co., Ltd.) was bonded so that the antistatic surface was opposite to the surface of the pressure-sensitive adhesive layer, the same procedure as in Example 1 was followed. A functional film (6) with an agent layer was obtained.
The results are shown in Table 1.

[Comparative Example 1]
A functional film (C1) with an adhesive layer was obtained in the same manner as in Example 1 except that the thickness of the adhesive layer was 3 μm.
The results are shown in Table 1.

[Comparative Example 2]
A functional film with pressure-sensitive adhesive layer (C2) was obtained in the same manner as in Example 1 except that the thickness of the pressure-sensitive adhesive layer was 20 μm.
The results are shown in Table 1.

[Comparative Example 3]
The acrylic adhesive composition obtained in Production Example 3 was applied to one surface of a base material “Lumirror S10” (thickness 38 μm, manufactured by Toray Industries, Inc.) made of polyester resin, and dried at 130 ° C. for 3 minutes. A pressure-sensitive adhesive layer having a thickness of 21 μm was formed. And it bonded together as a separator so that the silicone treatment surface of the film "Diafoil MRF-38" (thickness 38 micrometers, Mitsubishi Resin Co., Ltd.) consisting of the polyester resin by which the silicone treatment was carried out may become the surface side of an adhesive layer. After that, it carried out similarly to Example 1 and obtained the functional film (C3) with an adhesive layer.
The results are shown in Table 1.

  The functional film with the pressure-sensitive adhesive layer of the present invention is, for example, in combination with a low reflection film, the functional film with the pressure-sensitive adhesive layer of the present invention is disposed on one side of the transparent substrate, and the other of the transparent substrate By arranging the low reflection film on the side of the transparent substrate, the visibility is very excellent when viewed from the low reflection film side of the transparent substrate.

10 Functional film 20 comprising one or more layers Adhesive layer 30 Separator 100 First functional film with an adhesive layer 200 of the present invention Second functional film with an adhesive layer of the present invention

Claims (10)

A functional film with a pressure-sensitive adhesive layer comprising a functional film comprising one or more layers, a pressure-sensitive adhesive layer, and a separator attached to the surface of the pressure-sensitive adhesive layer in this order,
The wetting speed of the surface of the pressure-sensitive adhesive layer after peeling the separator from the surface of the pressure-sensitive adhesive layer is 5 cm ² / second or more,
Functional film with adhesive layer.   The functional film with an adhesive layer of Claim 1 whose thickness of the said adhesive layer is 30 micrometers-200 micrometers.   The pressure-sensitive adhesive according to claim 1 or 2, wherein the pressure-sensitive adhesive strength of the surface of the pressure-sensitive adhesive layer after peeling the separator from the surface of the pressure-sensitive adhesive layer is 1.0 N / 25 mm to 0.005 N / 25 m. Functional film with agent layer.   The functional film with an adhesive layer according to any one of claims 1 to 3, wherein the separator has an antistatic layer on the surface side of the adhesive layer.   The charged voltage on the surface of the pressure-sensitive adhesive layer when the separator is peeled from the surface of the pressure-sensitive adhesive layer at a peeling angle of 150 degrees and a peeling speed of 10 m / min is less than 1.0 kV. The functional film with an adhesive layer in any one of to.   The functional film with an adhesive layer in any one of Claim 1 to 5 in which the said adhesive layer contains a silicone type adhesive. A functional film composed of one or more layers, including a pressure-sensitive adhesive layer in this order, is a functional film with a pressure-sensitive adhesive layer,
The pressure-sensitive adhesive layer is the outermost layer;
An antistatic agent is present on at least a part of the surface of the pressure-sensitive adhesive layer;
The pressure-sensitive adhesive layer has a thickness of 30 μm to 100 μm.
Functional film with adhesive layer.   The functional film with an adhesive layer according to claim 7, wherein the adhesive layer contains a silicone-based adhesive.   The functional film with an adhesive layer in any one of Claim 1-8 whose said functional film is a polarizing plate. The functional film with the pressure-sensitive adhesive layer according to any one of claims 1 to 9, which is used for arranging on one side of the transparent substrate, and a low used for arranging on the other side of the transparent substrate. A film set including a reflective film.

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