TW201739868A - Single-side adhesive sheet - Google Patents

Abstract

To provide an adhesive sheet having an improved appearance quality. The present invention provides a single-side adhesive sheet comprising a substrate film, an adhesive layer provided on a first surface of the substrate film, and a colored layer provided on a second surface of the substrate film. The adhesive sheet has a rear side that is a mat treatment surface of alcohol resistance.

Description

Single-sided adhesive sheet

This invention relates to a one-sided adhesive sheet. The present application claims the priority of Japanese Patent Application No. 2015-252605, filed on Dec. It is incorporated herein by reference.

In general, an adhesive (also referred to as a pressure-sensitive adhesive. The same applies hereinafter) has the property of exhibiting a soft solid (viscoelastic) state in a temperature region near room temperature, which is simply followed by pressure. Being attached to the body. In order to utilize such a property, the adhesive is widely used in the form of an adhesive sheet with a base material, for the purpose of joining, fixing, and protecting various members. For example, in a portable electronic device such as a mobile phone, an adhesive sheet having the above-described configuration is used for the purpose of protecting a graphite sheet provided for heat dissipation or imparting design properties (Patent Document 1). Specifically, the adhesive sheet for this application has a configuration in which an adhesive layer is disposed on one surface of a base film on which a colored layer is formed. Patent Document 2 is a prior art document relating to an adhesive sheet having a fingerprint-resistant layer. [PRIOR ART DOCUMENT] [Patent Document 1] Japanese Patent Application Publication No. 2013-203965 (Patent Document 2) Japanese Patent Application Publication No. 2013-166891

[Problems to be Solved by the Invention] An adhesive sheet provided with a colored layer for the purpose of designing or the like is generally required to have an excellent appearance. Therefore, in such an adhesive sheet, a fingerprint-resistant layer or the like is provided on the back surface of the adhesive sheet, and a treatment such as a fingerprint mark adhered to a manufacturing process or the like is not apparent (see Patent Document 2). However, although the fingerprint-resistant layer is effective in reducing the visibility of the fingerprint mark, the fingerprint mark is not completely eliminated. Therefore, when a significant fingerprint mark is attached, it is necessary to wipe it off with a solvent such as alcohol. In this case, it is desirable to set the back surface of the adhesive sheet to an alcohol-resistant surface. The previous color layer or the fingerprint-resistant layer or the like is damaged by the use of the cleaning of the alcohol. Therefore, by setting the back surface of the adhesive sheet to an alcohol-resistant surface, regardless of the material of the coloring layer or the like, the alcohol can be wiped off. Fingerprint marks. Thereby, the appearance quality is improved. However, the requirements for the appearance quality are gradually further heightened. Specifically, when the fingerprint is removed by using alcohol, there is a case where the alcohol used for wiping is visible as a wipe. Although such a wrinkle is a slight change in appearance which has not been previously a problem, if the wrinkle can be eliminated, the appearance quality of the adhesive sheet can be further improved, which is useful. The present invention has been made in view of the above circumstances, and an object thereof is to provide an adhesive sheet which can further improve the appearance quality. [Means for Solving the Problems] According to the present invention, there is provided a one-sided adhesive sheet comprising a base film, an adhesive layer provided on the first surface of the base film, and a first film provided on the base film 2 The color layer on the surface. The back surface of the above-mentioned adhesive sheet is a matte-treated surface having alcohol resistance. As described above, by setting the back surface of the adhesive sheet to an alcohol-resistant surface, regardless of the material of the coloring layer or the like, the fingerprint can be wiped off with alcohol. Further, by setting the back surface of the adhesive sheet to a matte-treated surface, volatilization of the alcohol used for cleaning can be promoted, and the wrinkles become inconspicuous. Therefore, according to the present invention, the appearance quality of the adhesive sheet can be further improved. In a preferred aspect of the adhesive sheet disclosed herein, an alcohol-resistant layer is provided on the surface of the colored layer. By configuring as described above, the back surface of the adhesive sheet can exhibit excellent alcohol resistance. In a preferred aspect of the adhesive sheet disclosed herein, the alcohol-resistant layer comprises a particulate matte material. By the above configuration, the matte treatment of the back surface of the adhesive sheet can be preferably achieved. In a preferred aspect of the adhesive sheet disclosed herein, the alcohol-resistant layer has a thickness of 2 μm or less. According to the configuration as described above, the thickening of the adhesive sheet can be suppressed, and the desired appearance quality can be improved. This situation can be a preferred feature in applications requiring thinner or lighter thicknesses. In one preferred embodiment of the technique disclosed herein, the 60° gloss value of the back side of the adhesive sheet is 10 or less. With the above configuration, the appearance quality of the adhesive sheet is further improved. In a preferred aspect of the technique disclosed herein, the brightness L ^* defined by the L ^* a ^* b ^* color system on the back side of the adhesive sheet is 40 or less. The adhesive sheet having the above brightness can be a color tone having various uses suitable for desired black. The adhesive sheet having the above brightness can be preferably used for attachment to a graphite sheet. For example, the adhesive sheet having a 60° gloss value of 10 or less on the back surface and a brightness L ^* of 40 or less can exhibit a black feeling which is suppressed from being thick and heavy, and therefore can be particularly preferably applied to applications requiring such design. Further, according to the present invention, there is provided an adhesive sheet with a release liner comprising any of the adhesive sheets disclosed herein and a release liner for protecting the adhesive face of the adhesive sheet. Since the adhesive sheet has a matte finish surface on the back side of the adhesive sheet, the rewinding of the adhesive sheet is lighter when the adhesive sheet is rewinded. Therefore, damage between the substrate film and the layer of the coloring layer at the time of rewinding is prevented. Further, according to the present invention, there is provided an adhesive sheet with a release liner comprising a one-sided adhesive sheet and a release liner for protecting the adhesive surface of the adhesive sheet. The adhesive sheet includes a base film, an adhesive layer provided on the first surface of the base film, and a colored layer formed on the second surface of the base film. Further, the back surface of the above-mentioned adhesive sheet is a matte finish surface. Since the adhesive sheet as described above becomes a matte-treated surface on the back surface of the adhesive sheet, the rewinding of the adhesive sheet is lighter when it is rewinded from the roll form. Therefore, it is prevented from breaking between the layers of the base film and the coloring layer at the time of rewinding. Specifically, in the adhesive sheet in which the colored layer is provided on the surface of the base film, in order to improve the adhesion (scratch property) of the colored layer, an undercoat layer is provided between the base film and the colored layer. However, for example, when the thickness of the adhesive sheet is made thin, the undercoat layer may not be provided and a coloring layer may be directly formed on the substrate film. In this case, the adhesive sheet is formed into a roll (adhesive roll) in a state where the adhesive sheet is protected by a release liner, and the adhesive sheet is rewinded from the roll form, due to the release liner. The back surface (the surface opposite to the surface on which the adhesive sheet is adhered) is in close contact with the back surface of the adhesive sheet, which may cause interlayer damage between the base film and the coloring layer. By setting the back surface of the adhesive sheet to be a matte-treated surface, the contact area between the back surface of the adhesive sheet and the back surface of the release liner is reduced, and the interlayer film and the color layer are prevented from being damaged when rewinding from the roll. . In a preferred aspect of the technique disclosed herein, the adhesive sheet (which may be an adhesive sheet constituting an adhesive sheet with a release liner) has a total thickness of 30 μm or less. An improvement in the appearance quality can be preferably achieved by applying the technique disclosed herein to such a thin-thickness adhesive sheet. Alternatively, the adhesion between the substrate film and the coloring layer obtained by the technique disclosed herein can be effectively exhibited in the adhesive sheet having a small thickness as described above. The reason for this is that removing the undercoat layer disposed between the substrate film and the coloring layer can be one of methods for thinning the thickness. The appearance quality of the adhesive sheet disclosed herein is improved. Therefore, it can be preferably used as an adhesive sheet attached to a graphite sheet which requires a specific design and appearance. Specifically, it is suitable as an adhesive sheet for use in a graphite sheet disposed in a portable electronic device such as a mobile phone or a smart phone. Therefore, the adhesive sheet provided by the present specification can be laminated on a graphite sheet disposed in a portable electronic device. Further, from the same viewpoint, the adhesive sheet disclosed herein can be preferably used as an adhesive sheet attached to a fat iron sheet. Specifically, it is suitable as an adhesive sheet for use in a fat iron sheet mounted in a portable electronic device such as a mobile phone or a smart phone. Therefore, the adhesive sheet provided by the present specification can be laminated on the fat iron sheet disposed in the portable electronic machine.

Hereinafter, preferred embodiments of the present invention will be described. Furthermore, in addition to the matters specifically mentioned in the present specification and necessary for the implementation of the present invention, the manufacturer may be based on the instructions on the implementation of the invention and the technical common sense at the time of filing the application described in the present specification. Understood. The present invention can be implemented in accordance with the teachings of the present invention and the technical knowledge in the field. In the following description, members and portions that perform the same functions are denoted by the same reference numerals, and the description thereof will be omitted or simplified. Further, the embodiments described in the drawings are schematically illustrated to clearly illustrate the present invention, and the size or reduction ratio of the adhesive sheet of the present invention actually provided as a product is not necessarily accurately indicated. In the specification, the term "adhesive" means a material having a property of exhibiting a soft solid (viscoelastic body) in a temperature region near room temperature, which is simply followed by pressure. On the body. The term "adhesive" as used herein, as defined in "CA Dahlquist, "Adhesion: Fundamental and Practice"', McLaren & Sons, (1966) P. 143", generally has a complex tensile modulus E. ^* (1Hz)<10 ⁷ Dyne/cm ² A material of a nature (typically a material having the above properties at 25 ° C). <Composition of Adhesive Sheet> The adhesive sheet disclosed herein is a substrate-attached single-sided adhesive sheet in the form of an adhesive layer on one surface of a base film (support). Here, the concept of the adhesive sheet may be referred to as an adhesive tape, an adhesive label, an adhesive film, or the like. Furthermore, the adhesive sheet disclosed herein may be in the form of a roll or a single piece. Alternatively, it may be an adhesive sheet which is further processed into various shapes. The adhesive sheet disclosed herein may be, for example, a cross-sectional structure schematically shown in FIG. The adhesive sheet 1 shown in FIG. 1 includes a base film 10, an adhesive layer 20 provided on the first surface 10A of the base film 10, and a colored layer 30 provided on the second surface 10B of the base film 10. Further, a top coat 40 is provided on the surface of the colored layer 30. In the adhesive sheet 1, the surface of the adhesive layer 20 is adhered to the back surface 1A of the sheet 1. The adhesive sheet 1 before use has a configuration in which the adhesive layer 20 is protected by the release liner 50 which becomes the release surface 50B on the side of the adhesive layer 20. When the adhesive sheet 1 with the release liner 50 is formed into a roll (adhesive roll) for the purpose of conveyance or storage, the outer surface 50A of the release liner 50 (located on the peeling surface) 50B is the surface on the opposite side) in a state in which the back surface 1B of the adhesive sheet (the surface 40A of the top coat layer 40 in the present embodiment) is in contact with each other. The top coat layer 40 disposed on the surface of the colored layer 30 constitutes the back surface (outermost surface) 1B of the adhesive sheet 1. In the embodiment, the top coat layer 40 is a matte layer for imparting matting properties to the back surface 1B of the adhesive sheet 1. However, the present invention is not limited thereto, and may be an alcohol-resistant alcohol-resistant layer. A layer of matting and alcohol resistance (alcohol-resistant matting layer). Further, it is also technically possible to form the surface of the colored layer 30 as a matte-treated surface without forming a top coat layer, or to make the colored layer 30 have alcohol resistance. Therefore, the top coat layer 40 may not be present in this case. <Characteristics of Adhesive Sheets, etc.> The back surface of the adhesive sheet disclosed herein is a matte finish surface. By performing the matting treatment on the back surface of the adhesive sheet, the rewinding of the adhesive sheet in the form of the reel is light, and the interlayer between the substrate film and the coloring layer is prevented from being broken. Further, when alcohol resistance is imparted to the back surface of the adhesive sheet, the wrinkles of the alcohol are not noticeable and the appearance quality is improved. In the present specification, the matte finish surface refers to a surface subjected to active matte treatment such as matting treatment (surface treatment) such as embossing or sand blasting, or formation of a matte layer. After the matte treatment, the surface having a 60° gloss value to be described later which is lower than that before the matte treatment is a typical example of the matte finish surface described herein. In one preferred embodiment, the back side of the adhesive sheet has an alcohol resistant surface (alcohol resistant surface). Here, the back surface of the adhesive sheet has alcohol resistance, and refers to a surface on which the appearance change (typically dissolution) of the surface is suppressed when exposed to an alcohol. Typically, it is preferably used in the examples described later. The surface evaluated as "acceptable" in the alcohol resistance evaluation test measured by the method described in the above. Therefore, when a fingerprint mark adheres to the back surface of the adhesive sheet, the material of the coloring layer or the like cannot be used, and the fingerprint mark can be wiped off using alcohol. In one preferred embodiment, the 60° gloss value of the back side of the adhesive sheet is 10 or less. Thereby, the appearance quality of the adhesive sheet is further improved. Further, the rewinding of the adhesive sheet in the form of a reel becomes lighter, and the interlayer destruction between the base film and the colored layer is more surely prevented. The 60° gloss value of the back surface of the above-mentioned adhesive sheet is more preferably 7 or less, still more preferably 6 or less (typically 5.5 or less). The lower limit of the 60° gloss value is not particularly limited, and is preferably 1 or more, and more preferably 2 or more (for example, 3 or more, and typically 3.5 or more) from the viewpoint of design or color tone. The 60° gloss value of the back surface of the adhesive sheet was measured using a commercially available gloss meter (for example, the product name "High Gloss GLOSS CHECKER IG-410" manufactured by Horiba, Ltd.) at a measurement angle of 60°. The same applies to the embodiment described later. In a preferred aspect, the back side of the adhesive sheet is L ^* a ^* b ^* Brightness L specified by the color system ^* It may be 50 or less (for example, 40 or less, typically 35 or less). The above brightness L ^* It is preferably 30 or less. The adhesive sheet having the above brightness can be a color tone having various uses suitable for desired black. The adhesive sheet having the above brightness can be preferably used for attachment to a graphite sheet. About the above brightness L ^* The lower limit is not particularly limited, but may be set to be approximately 15 or more (for example, 20 or more) from the viewpoint of appearance and the like. In one aspect of the special case, the 60° gloss value of the back surface is 10 or less (for example, 3 to 7, typically 3.5 to 5.5), and the brightness is L. ^* It is an adhesive sheet of 40 or less (for example, 15 to 35, typically 20 to 30). The adhesive sheet having the above-mentioned back surface can exhibit a thick black feeling with suppressed gloss, and thus can be particularly preferably applied to applications requiring such design. The adhesive sheet having the above-mentioned back surface can have a color tone sufficiently coordinated with a peripheral member (for example, a battery) or the like, for example, by laminating on a graphite sheet. The back of the adhesive sheet is made of L ^* a ^* b ^* The chromaticity a specified by the color system ^* Although it is not particularly limited, it is preferably set to a range of ±15 (for example, ±5, typically ±2) in consideration of the color tone coordination with the periphery of the portion (which may be a member) to which the adhesive sheet is applied. Chroma b ^* Although it is not particularly limited, it is preferably set to a range of ±15 (for example, ±10, typically ±5). In the present specification, the term "range of ±X" is used in the sense of the range of -X to +X. Furthermore, L in this specification ^* a ^* b ^* The color system is based on the recommendations of the International Commission on Illumination in 1976 or JIS Z 8729. Specifically, L ^* a ^* b ^* A color difference meter (trade name "CR-400", manufactured by Minolta Co., Ltd.; color color difference meter) was used, and the back surface of the adhesive sheet was measured at a plurality of portions (for example, five or more points), and the average value thereof was used. The same applies to the embodiment described later. The adhesive sheet disclosed herein preferably has a light transmittance of 20% or less. Thereby, the adhesive sheet shows good light blocking properties. The light transmittance is preferably 15% or less, more preferably 10% or less, still more preferably less than 10% (for example, 7% or less, typically 5% or less). In one aspect of the special case, the above light transmittance is less than 1% (for example, less than 0.5%, typically less than 0.1%) from the viewpoint of obtaining sufficient light-shielding property, and may be substantially 0%. Alternatively, the light transmittance may be 1% or more, or 2% or more. According to such an adhesive sheet, the color tone of the adherend (for example, a graphite sheet) can be appropriately (correctly) reflected, and the desired color tone, texture, and design can be imparted. The light transmittance of the adhesive sheet can be determined by directly irradiating light having a wavelength of 380 to 780 nm on one surface of the adhesive sheet using a commercially available spectrophotometer, and measuring the intensity of light transmitted to the other surface. As the spectrophotometer, for example, a spectrophotometer (device name "U4100 spectrophotometer") manufactured by Hitachi, Ltd. can be used. The same applies to the embodiment described later. The adhesive sheet disclosed herein preferably has a 180 degree peel strength of 0.5 N/20 mm or more. The adhesive sheet exhibiting the above characteristics can be well adhered to the adherend (for example, a graphite sheet). The peel strength is more preferably 1.0 N/20 mm or more, and still more preferably 2.0 N/20 mm or more. In another preferred embodiment, the adhesion to the adherend is emphasized, and the peel strength is 5.0 N/20 mm or more, more preferably 8.0 N/20 mm or more, and still more preferably 12.0 N/20 mm or more. Here, the peel strength means a 180-degree peel strength (180-degree peeling adhesion force) to a stainless steel plate. The 180 degree peel strength can be measured as follows. Specifically, a single-sided tape (trade name "No. 31B", manufactured by Nitto Denko Corporation, with a total thickness of 50 μm) was attached to the back side of the adhesive sheet, and the adhesive sheet was cut into a width of 20 mm and a length of 100 mm. A measurement sample was prepared by measuring the sample, and the 2 kg roller was reciprocated once in a 23 ° C, 50% RH environment, and the back surface of the measurement sample was pressure-bonded to the surface of a stainless steel plate (SUS304BA plate). . After leaving it in the same environment for 30 minutes, the peel strength (N/) was measured under the conditions of a tensile speed of 300 mm/min and a peeling angle of 180 degrees using a universal tensile compression tester in accordance with JIS Z 0237:2000. 20 mm). As the universal tensile compression tester, for example, a "tensile compression tester, TG-1kN" manufactured by Minebea Co., Ltd. can be used. The same measurement method is also employed in the examples described later. The total thickness of the adhesive sheet (including the adhesive layer, the base film, the colored layer, and the top coat, but not including the release liner) disclosed herein is not particularly limited, and is suitably set to be approximately 2 μm or more (for example, 3 μm or more), and suitably 150 μm or less (for example, 100 μm or less, typically 50 μm or less). Preferably, the total thickness of the adhesive sheet is 30 μm or less (for example, 20 μm or less, typically 10 μm or less), and the total thickness may be 7 μm or less. The adhesive sheet having a small thickness can be advantageous in terms of thinning, miniaturization, weight reduction, resource saving, and the like of the article to which the adhesive sheet is applied. Further, when the adhesive sheet disclosed herein is used for the application to the graphite sheet, the heat dissipation effect of the graphite sheet can be sufficiently exerted by forming the adhesive sheet with a thin thickness. In other preferred embodiments, the total thickness of the adhesive sheet is 10 μm or more, more preferably 25, from the viewpoint of self-operability or an increase in the thickness of the adhesive layer to obtain sufficient adhesive properties (for example, adhesive force). Above μm (for example, 45 μm or more, typically 60 μm or more). <Base film> In the adhesive sheet disclosed herein, the base film (support base film) which supports (substrate) the adhesive layer is typically a resin material as a main component (for example, a base film) A resin film containing more than 50% by weight of the component). In the present specification, the term "resin film" generally means a resin film which is substantially non-foamed. That is, the resin film in the present specification may be one in which substantially no bubbles (no voids) are present in the resin film. Therefore, the above resin film is different from the so-called foam film. Further, the above-mentioned resin film is typically a substantially non-porous film and is a concept different from a so-called non-woven fabric or woven fabric. A base film which does not contain a foam or a porous layer such as a nonwoven fabric or a woven fabric, that is, a base film including a non-porous layer can be preferably used. In general, the resin film tends to have excellent mechanical strength such as tensile strength as compared with a foam, a nonwoven fabric, or a woven fabric. Moreover, workability (for example, punching workability) is excellent. Therefore, an adhesive sheet using a base film including a resin film is advantageous in terms of workability, dimensional accuracy, and workability. In addition, from the viewpoints of dimensional stability, thickness accuracy, economy (cost), and the like, a substrate comprising such a resin film can be preferably used as a substrate film in the technology disclosed herein. A suitable example of the resin material constituting the resin film disclosed herein is a polyolefin resin or a polyester resin. Here, the polyolefin-based resin refers to a resin containing polyolefin in a proportion of more than 50% by weight. Similarly, the polyester resin refers to a resin containing polyester in a proportion of more than 50% by weight. Examples of the polyolefin resin film include a polyethylene (PE) resin, a polypropylene (PP) resin, an ethylene-propylene copolymer, and an ethylene-butene copolymer. Examples of the polyester resin include polyethylene terephthalate (PET) resin, polybutylene terephthalate (PBT) resin, polyethylene naphthalate resin, and poly naphthalene dicarboxylic acid. Butadiene ester resin and the like. Among them, from the viewpoint of the self-curing property (especially the gripping property of the acrylic pressure-sensitive adhesive layer), a polyester resin is preferable, and a PET resin is particularly preferable from the viewpoint of strength and workability. In the base film (for example, a resin film), a filler (inorganic filler, organic filler, etc.), an anti-aging agent, an antioxidant, an ultraviolet absorber, an antistatic agent, a lubricant, a plasticizer may be blended as needed. And other additives. The proportion of the various additives is usually in the range of less than 30% by weight (e.g., less than 20% by weight, typically less than 10% by weight). As the substrate film (typically a resin film), a transparent film (typically a transparent resin film) can be preferably used. Such a substrate film can be substantially free of colorants. Here, the base film (typically a resin film) does not substantially contain a colorant, and the content of the colorant is less than 1% by weight, preferably less than 0.1% by weight. Alternatively, the substrate film in the technique disclosed herein may be colored black or white (for example, milky white) in order to exhibit the desired design or optical properties (for example, light blocking properties, etc.) of the adhesive sheet comprising the substrate film. other colours. The coloring can be carried out, for example, by mixing a known organic or inorganic coloring agent (pigment, dye, etc.) into a material (typically a resin material) constituting the base film. The substrate film disclosed herein may be a single layer structure or a multilayer structure having 2 layers, 3 layers or more. The base film is preferably a single layer structure from the viewpoint of shape stability. In the case of a multilayer structure, it is preferred that at least one layer (preferably all layers) be a layer having a continuous structure of the above-mentioned resin (for example, a polyester resin). The method for producing the base film (typically a resin film) is not particularly limited as long as it is suitably a conventionally known method. For example, a conventionally known general film forming method such as extrusion molding, inflation molding, T-die casting, and calender roll molding can be suitably employed. The surface of the base film may be subjected to a previously known surface treatment such as corona discharge treatment, plasma treatment, ultraviolet irradiation treatment, acid treatment, alkali treatment, or application of a primer (formation of an undercoat layer). Such a surface treatment can be a treatment for improving the adhesion between the base film and the adhesive layer or the adhesion between the base film and the colored layer. Furthermore, the techniques disclosed herein can be preferably carried out by the fact that no undercoat layer is formed between the substrate film and the adhesive layer and/or between the substrate film and the colored layer, the substrate The film and adhesive layer, and/or the substrate film are in direct contact with the colored layer. The thickness of the adhesive sheet thus constituted can be made thinner. The thickness of the base film is not particularly limited. The thickness of the substrate film of one aspect can be, for example, 30 μm or less. By making the thickness of the base film thin, the thickness of the adhesive sheet is also reduced, and it is also advantageous in terms of thinning, miniaturization, weight reduction, and resource saving of the product to which the adhesive sheet is applied. Moreover, when the adhesive sheet disclosed herein is used in the case of a heat sink (typically a graphite sheet), the heat dissipation efficiency of the heat sink can be improved. The thickness of the base film is preferably 12 μm or less, more preferably 9 μm or less (for example, 7 μm or less, and typically 5 μm or less). When the miniaturization and weight reduction are particularly emphasized, the thickness of the base film is particularly preferably set to 3 μm or less (for example, 2 μm or less). The thickness of the base film is preferably approximately 0.5 μm or more (for example, 1 μm or more) from the viewpoints of handling properties and workability. In another aspect, the thickness of the base film exceeds 30 μm (for example, 35 μm or more) from the viewpoint of workability and the like. The thickness of the base film of this aspect is suitably set to be approximately 200 μm or less (for example, 100 μm or less, typically 50 μm or less). <Colored layer> The coloring layer provided on the second surface of the base film (the surface opposite to the surface on the side of the adhesive layer side) may be, for example, a black printed layer printed on the surface (second surface) of the base film. An adhesive sheet comprising a black layer as a colored layer can be preferably used, for example, for attachment to a graphite sheet. The colored layer is typically formed by applying a composition for forming a color layer containing a colorant and a binder onto a base film. As the binder, a material known in the field of coating or printing can be used without particular limitation. Examples of such a material include a polyurethane, a phenol resin, an epoxy resin, a urea melamine resin, and polymethyl methacrylate. The composition for forming a colored layer may be, for example, a solvent type, an ultraviolet curing type, a thermosetting type or the like. The formation of the colored layer can be carried out without any particular limitation by a method previously used for forming a colored layer. For example, a method of forming a coloring layer (printing layer) by printing such as gravure printing, flexographic printing, or offset printing can be preferably employed. The colored layer may be a single layer structure composed entirely of one layer, or may be a multilayer structure including two, three or more sub-colored layers. The colored layer of the multilayer structure including two or more sub-colored layers can be formed, for example, by coating (for example, printing) of the composition for forming a colored layer. The color or the amount of the coloring agent contained in each of the sub-colored layers may be the same or different. In the coloring layer for imparting light shielding properties, it is particularly useful to have a multilayer structure from the viewpoint of preventing the occurrence of pinholes and improving the reliability of preventing light leakage. As the coloring agent for coloring the colored layer, a known pigment or dye corresponding to the target color can be appropriately selected. Although not particularly limited, examples of the white pigment include titanium dioxide, zinc white, and lead white. Examples of the black pigment include carbon black, acetylene black, loose smoke, and graphite. These may be used alone or in combination of two or more. The content of the coloring agent is not limited to a specific range, and is not limited to a specific range. However, it is suitably about 1% by weight or more, preferably 2% by weight or more in the colored layer (for example, 5 wt% or more, typically 15 wt% or more). Further, the content of the coloring agent is suitably 65 wt% or less, preferably 30 wt% or less (for example, 15 wt% or less, typically 8 wt% or less) in the colored layer. The thickness of the entire colored layer is usually suitably 0.1 μm or more, preferably 0.5 μm or more, more preferably 0.7 μm or more (for example, 0.8 μm or more, and typically 1 μm or more). In another aspect, from the viewpoint of obtaining sufficient light blocking properties, the thickness of the entire colored layer is preferably 2 μm or more (for example, 3 μm or more, and typically 4 μm or more). Further, the thickness of the entire colored layer is usually 10 μm or less, preferably 7 μm or less, more preferably 5 μm or less (for example, 3 μm or less, and typically 2 μm or less). In the coloring layer including the two or more sub-colored layers, the thickness of each sub-colored layer is usually preferably about 0.5 μm to 2 μm. <Topcoat> The top coat disclosed herein is a layer formed on the surface of the colored layer and constitutes a layer on the back side of the adhesive sheet. The top coat layer is disposed in such a manner that the surface of the colored layer is covered in the adhesive sheet. The hue or design of the back side of the adhesive sheet is achieved by a colored layer, so the top coat is typically transparent (including translucent). Further, the surface (outer surface) of the top coat layer is preferably a matte finish surface, and in this case, the top coat layer may alternatively be a matte layer. The matte layer may be a top coat layer (a layer having a matte finish surface) formed by embossing or sandblasting the surface thereof, or may be matte when formed on the surface of the colored layer by coating or the like. The matting layer. It is preferred that the top coat is a matte layer from the viewpoint of the protective function of the colored layer. In a preferred aspect, the topcoat layer comprises a matte layer. Typically, the top coat is a matte layer. Here, the matte layer refers to a layer which lowers the gloss of the surface of the color layer on which the layer is formed. Thereby, the appearance quality is improved, and the layer between the base film and the coloring layer such as the rewinding of the adhesive sheet in the form of a reel is prevented from being broken. Furthermore, the presence or extent of the reduction in gloss can be grasped by measuring the above 60° gloss value. The top coat surface may be the back side of the adhesive sheet, and therefore the 60° gloss value of the top coat surface may be a value within the range indicated by the 60° gloss value of the back side of the adhesive sheet. The top coat (matte layer) disclosed herein preferably has a matte property by its composition. For example, the matte layer can be a buffing material. Thereby, it is possible to impart matting properties to the top coat layer without performing additional surface treatment. The matte material is typically in the form of particles, and transparent (typically colorless and transparent) can be preferably used. The particle shape of the matte material is not particularly limited, and may be a spherical shape or the like. The matting material may be either organic particles or inorganic particles, or both may be used in combination. Examples of the organic particles include acrylic resin particles such as polymethyl methacrylate particles, polystyrene particles, styrene-acrylic resin particles, polycarbonate particles, and urethane resin beads. Epoxy resin beads, polyester resin beads, polyester urethane resin beads, and the like. Examples of the inorganic particles include cerium oxide (antimonite) particles, titanium oxide particles, barium sulfate particles, calcium carbonate particles, mica, and talc. These may be used alone or in combination of two or more. Among them, acrylic resin particles, urethane resin beads, and vermiculite particles are preferable. The average particle diameter of the matting material is determined according to the degree of matting required, the thickness of the matte layer, and the like. Therefore, it is not limited to a specific range, and is suitably about 0.1 μm or more, preferably 0.5 μm or more (for example, 1 μm). Above, typically more than 1 μm). Further, the average particle diameter is suitably 20 μm or less, preferably 8 μm or less (for example, 3 μm or less, and typically 2 μm or less). The average particle diameter of the matte material is preferably one half or more of the thickness of the matte layer from the viewpoint of sufficiently exhibiting matteness, and is preferably the same as or larger than the thickness of the matte layer. The average particle diameter of the matte material is preferably 10 times or less (for example, 5 times or less, typically 3 times or less) the thickness of the matte layer from the viewpoint of the appearance or the coating property. In addition, the average particle diameter of the matte material refers to a particle size distribution obtained by measurement based on laser diffraction or scattering method, and the cumulative particle size based on the volume basis is 50%, that is, 50% by volume average. Particle size (50% median diameter). The content of the matting material is set according to the degree of matting required, the particle diameter of the matte material, and the like. Therefore, it is not limited to a specific range, and is suitably 0.5% by weight or more, preferably 1 in the matte layer. The weight % or more (for example, 2% by weight or more, and typically 3% by weight or more). Further, the content of the above-mentioned matte material is suitably 40% by weight or less, preferably 20% by weight or less (for example, 10% by weight or less, typically 8% by weight or less) in the matte layer. In a preferred aspect, the topcoat layer comprises an alcohol resistant layer. Typically, the top coat is preferably an alcohol resistant layer. Here, the alcohol-resistant layer refers to a layer that imparts alcohol resistance to an adhesive sheet (typically, the back surface of the adhesive sheet). Specifically, the alcohol-resistant layer is a layer which is evaluated as "acceptable" in the alcohol resistance evaluation test described later in a state of being disposed on the back side of the adhesive sheet. The alcohol-resistant layer can be obtained by selecting the kind or amount of the additive component such as the resin component or the solvent or the dispersant contained in the composition for forming the alcohol-resistant layer. The resin component may be selected from those which are excellent in alcohol resistance from among the resin components which can be contained in the top coat layer which will be described later, according to technical knowledge. As a commercial item, the 9000PL series and 9100PL series (all solvent type PET inks) manufactured by ten chemical companies are mentioned. Since the commercially available product may contain a coloring agent, for example, the part number "#9092" (black ink) may be used as a material for forming a coloring layer having alcohol resistance. The top coat layer (which may be either a matte layer, an alcohol-resistant layer, or an alcohol-resistant matte layer having both functions of a matte layer and an alcohol-resistant layer) may contain other additive components such as a resin component or a dispersant. In the case where the top coat is transparent, the top coat is substantially free of colorants. Here, the term "top coat layer" substantially does not contain a colorant means that the content of the colorant is less than 1% by weight, preferably less than 0.1% by weight. Examples of the resin component contained in the top coat layer include a polyurethane resin, a phenol resin, an epoxy resin, a urea melamine resin, a polyoxyn resin, a phenoxy resin, and a methyl group. Acrylic resin, acrylic resin, polyarylate resin, polyester resin, polyolefin resin, polystyrene resin, styrene-acrylic resin, styrene-maleic acid resin, polyvinyl chloride , vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer, polyvinyl acetate, polyvinylidene chloride, polycarbonate, cellulose, polyacetal, alkyd resin, and the like. The resin component may be used alone or in combination of two or more. The resin composition for forming the top coat layer (resin composition for forming a top coat layer) may be a solvent type composition, a thermosetting type composition, or an ultraviolet curable type composition, from the viewpoint of layer formability or heat resistance. It is preferably a thermosetting type or an ultraviolet curing type. The method of forming the top coat layer using the above composition for forming a top coat layer is not particularly limited, and various printing treatment methods can be employed. The printing treatment method is not particularly limited, and various known or conventional methods such as offset printing, screen printing, letterpress printing, flexographic printing, and gravure printing can be suitably employed. Specifically, the solid component (typically a resin component or a dispersant) constituting the above composition is dissolved or dispersed in a suitable solvent, and is obtained on a colored layer by a suitable method in the above-described printing treatment method. The composition is printed to form a top coat. The top coat typically has a single layer structure. Alternatively, the top coat layer may have a multilayer structure comprising a matte layer and/or an alcohol resistant layer. In the case where the top coat layer contains a matte layer and an alcohol-resistant layer, it is preferred to dispose the alcohol-resistant layer on the outermost side. Further, for example, the top coat layer may have a release treatment layer on the outermost side (the back side of the adhesive sheet). Moreover, it is preferable that there is no undercoat layer between the top coat layer and the coloring layer from the viewpoint of the thickness of the adhesive sheet being thinned, but the undercoat layer or the like may be provided in order to improve the interlayer adhesion. The thickness of the top coat layer is preferably about 0.1 μm or more, and preferably about 0.2 μm or more (for example, 0.3 μm or more) in consideration of imparting specific characteristics (for example, matting property, alcohol resistance, and the like) or coatability. Typically, 0.5 μm or more). Moreover, from the viewpoint of thickness reduction, the thickness is suitably about 5 μm or less, preferably about 3 μm or less (for example, 2 μm or less, and typically 1.5 μm or less). Although not particularly limited, in the adhesive sheet disclosed in this way, the total thickness of the layers other than the adhesive layer (the total thickness of the non-adhesive layer. Typically, the total of the base film, the colored layer, and the top coat) The thickness) is, for example, 40 μm or less, preferably 30 μm or less, more preferably 20 μm or less. The total thickness of the non-adhesive layer is preferably 10 μm or less, and particularly preferably 5 μm or less (for example, 4.5 μm or less) from the viewpoint of limiting the total thickness of the adhesive sheet to a specific thickness or less and obtaining a high adhesive performance. ). The lower limit of the total thickness of the non-adhesive layer is not particularly limited, but is usually 2 μm or more, and preferably 3 μm or more (for example, 3.5 μm or more) from the viewpoint of workability of the adhesive sheet and the like. The total thickness of the non-adhesive layer of another aspect may be 10 μm or more or 20 μm or more (for example, 35 μm or more) from the viewpoint of light shielding property or workability. <Adhesive Layer> In the technique disclosed herein, the type of the adhesive constituting the adhesive layer is not particularly limited. The above-mentioned adhesive may be an acrylic polymer, a rubber-based polymer, a polyester-based polymer, a urethane-based polymer, a polyether-based polymer, or a polyoxymethylene-based polymer which is known in the field of an adhesive. One or two or more kinds of various rubbery polymers such as a polyamide polymer or a fluorine polymer are used as the base polymer. From the viewpoints of adhesion performance or cost, etc., an adhesive containing an acrylic polymer or a rubber-based polymer as a base polymer can be preferably used. Among them, an adhesive (acrylic adhesive) using an acrylic polymer as a base polymer is preferred. Hereinafter, an adhesive sheet having an adhesive layer containing an acrylic adhesive, that is, an acrylic adhesive layer will be mainly described, but it is not intended to limit the adhesive layer of the adhesive sheet disclosed herein to include an acrylic adhesive. By. In addition, the "base polymer" of the adhesive means the main component of the rubbery polymer contained in the adhesive. The rubbery polymer refers to a polymer which exhibits rubber elasticity in a temperature region near room temperature. In the specification, the term "main component" means a component containing more than 50% by weight, unless otherwise specified. In addition, the "acrylic polymer" means a monomer unit containing a monomer derived from at least one (meth)acryl fluorenyl group in one molecule as a monomer unit constituting the polymer. Hereinafter, a monomer having at least one (meth) acrylonitrile group in one molecule is also referred to as an "acrylic monomer". Therefore, the acrylic polymer in the present specification is defined as a polymer containing a monomer unit derived from an acrylic monomer. Typical examples of the acrylic polymer include an acrylic polymer in which the proportion of the acrylic monomer in all the monomer components of the acrylic polymer is more than 50% by weight. Moreover, the term "(meth)acryloyl) refers to the meaning of a propylene group and a methacryl group. Similarly, the term "(meth)acrylate" refers to the meaning of acrylate and methacrylate, and "(meth)acrylic" refers to the meaning of acryl and methacryl. As the acrylic polymer, for example, a polymer containing a (meth)acrylic acid alkyl ester as a main monomer and further containing a monomer raw material having a copolymerizable sub-monomer with the main monomer is preferable. Here, the main single system means a component which accounts for more than 50% by weight of the monomer composition in the above monomer raw material. As the alkyl (meth)acrylate, for example, a compound represented by the following formula (1) can be suitably used. CH ₂ =C(R ¹ )COOR ² (1) Here, R in the above formula (1) ¹ It is a hydrogen atom or a methyl group. Also, R ² It is a chain alkyl group having 1 to 20 carbon atoms. Hereinafter, the range of such a carbon number is sometimes expressed as "C" _1-20 "." From the viewpoint of the storage elastic modulus of the adhesive, etc., it is appropriate to use R ² For C _1-14 (eg C _2-10 Typically C _4-8 The alkyl (meth) acrylate of a chain alkyl group is used as a main monomer. From the viewpoint of self-adhesive properties, it is preferred to use R ¹ Is a hydrogen atom, R ² For C _4-8 Alkyl acrylate of a chain alkyl group (hereinafter also referred to as acrylic acid C) _4-8 The alkyl ester) is used as the main monomer. As R ² For C _1-20 Examples of the alkyl (meth)acrylate of the chain alkyl group include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, and isopropyl (meth)acrylate. Ester, n-butyl (meth)acrylate, isobutyl (meth)acrylate, second butyl (meth)acrylate, amyl (meth)acrylate, isoamyl (meth)acrylate, (methyl) Hexyl acrylate, heptyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, octyl (meth)acrylate, isooctyl (meth)acrylate, decyl (meth)acrylate, Isodecyl (meth)acrylate, decyl (meth)acrylate, isodecyl (meth)acrylate, undecyl (meth)acrylate, lauryl (meth)acrylate, (meth)acrylic acid Tridecyl ester, tetradecyl (meth)acrylate, pentadecyl (meth)acrylate, cetyl (meth)acrylate, heptadecyl (meth)acrylate, Octadecyl (meth)acrylate, nonadecyl (meth)acrylate, eicosyl (meth)acrylate, and the like. These alkyl (meth)acrylates may be used alone or in combination of two or more. Preferred examples of the alkyl (meth)acrylate include n-butyl acrylate (BA) and 2-ethylhexyl acrylate (2EHA). The proportion of the alkyl (meth)acrylate in all the monomer components used for the synthesis of the acrylic polymer is preferably 70% by weight or more, more preferably 85% by weight or more, and still more preferably 90% by weight or more. . The upper limit of the ratio of the alkyl (meth)acrylate is not particularly limited, but is usually preferably 99.5% by weight or less (for example, 99% by weight or less). Alternatively, the acrylic polymer may be one obtained by substantially polymerizing only an alkyl (meth)acrylate. Also, in the use of acrylic acid C _4-8 When the alkyl ester is used as a monomer component, the acrylic acid C in the alkyl (meth)acrylate contained in the monomer component _4-8 The proportion of the alkyl ester is preferably 70% by weight or more, more preferably 90% by weight or more, still more preferably 95% by weight or more (typically 99 to 100% by weight). The technique disclosed herein can be preferably carried out by using 50% by weight or more (e.g., 60% by weight or more, typically 70% by weight or more) of all monomer components in the form of BA. In a preferred embodiment, all of the above monomer components may contain 2EHA in a smaller ratio than BA. In the acrylic polymer in the technique disclosed herein, a monomer other than the above (other monomer) may be copolymerized within a range that does not significantly impair the effects of the present invention. The other monomer may be used for the purpose of adjusting the glass transition temperature (Tg) of the acrylic polymer, adjusting the adhesion property (for example, peelability), and the like. For example, examples of the monomer which can improve the cohesive force or heat resistance of the adhesive include a sulfonic acid group-containing monomer, a phosphate group-containing monomer, a cyano group-containing monomer, a vinyl ester, and an aromatic vinyl group. A compound or the like. As a suitable example of these, a vinyl ester is mentioned. Specific examples of the vinyl esters include vinyl acetate (VAc), vinyl propionate, and vinyl laurate. Of these, VAc is preferred. In addition, as a monomer which can introduce a functional group which can be a crosslinking point in an acrylic polymer, or can contribute to the improvement of an adhesive force, the monomer which has a hydroxyl group (OH group), and a carboxyl group is mentioned. Monomer, acid anhydride group-containing monomer, amide group-containing monomer, amine group-containing monomer, quinone group-containing monomer, epoxy group-containing monomer, (meth) propylene hydrazine &# 134156; porphyrin, vinyl ether and the like. A suitable example of one of the acrylic polymers in the technique disclosed herein is an acrylic polymer obtained by copolymerizing a monomer having a carboxyl group as the other monomer. Examples of the carboxyl group-containing monomer include acrylic acid (AA), methacrylic acid (MAA), carboxyethyl (meth)acrylate, carboxypentyl (meth)acrylate, itaconic acid, maleic acid, and the like. Fumaric acid, crotonic acid, methacrylic acid, and the like. Among them, AA and MAA are preferred. Other suitable examples include an acrylic polymer in which a monomer having a hydroxyl group is copolymerized as the other monomer. Examples of the hydroxyl group-containing monomer include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, and (meth)acrylic acid. Hydroxyalkyl (meth)acrylate such as 2-hydroxybutyl ester or 4-hydroxybutyl (meth)acrylate; polypropylene glycol mono(meth)acrylate; N-hydroxyethyl(meth)acrylamide . In particular, as a monomer having a hydroxyl group as a preferred one, a linear hydroxyalkyl (meth)acrylate having an alkyl group of 2 to 4 carbon atoms is exemplified. The above-mentioned "other monomers" may be used alone or in combination of two or more. The total content of the other monomers is preferably about 40% by weight or less (typically 0.001 to 40% by weight) of all the monomer components, more preferably about 30% by weight or less (typically 0.01 to 30% by weight). %, for example, 0.1 to 10% by weight). When a monomer having a carboxyl group is used as the other monomer, the content thereof is suitably 0.1% by weight or more (for example, 0.2% by weight or more, typically 0.5% by weight or more) of all the monomer components, and Suitably, it is set to approximately 10% by weight or less (for example, 8% by weight or less, typically 5% by weight or less). When a monomer having a hydroxyl group is used as the other monomer, the content is suitably 0.001% by weight or more (for example, 0.01% by weight or more, typically 0.02% by weight or more) of all the monomer components, and It is suitably 10 weight% or less (for example, 5 weight% or less, typically 2 weight% or less). The copolymerization composition of the acrylic polymer is suitably designed such that the glass transition temperature (Tg) of the polymer is -15 ° C or lower (typically -70 ° C or higher and -15 ° C or lower). The Tg of the acrylic polymer is preferably -25 ° C or lower (for example, -60 ° C or higher and -25 ° C or lower), more preferably -40 ° C or lower (for example, -60 ° C or higher and -40 ° C or lower). From the viewpoint of adhesion workability of the adhesive sheet, etc., it is preferable to set the Tg of the acrylic polymer to be equal to or less than the above upper limit. The Tg of the acrylic polymer can be adjusted by suitably changing the monomer composition (i.e., the kind or amount ratio of the monomers used to synthesize the polymer). Here, the Tg of the acrylic polymer means the Tg obtained by the Fox formula based on the composition of the monomer component for synthesizing the polymer. The Fox formula is a relationship between the Tg of the copolymer and the glass transition temperature Tgi of the homopolymer obtained by homopolymerizing the monomers constituting the copolymer as follows. 1/Tg=Σ(Wi/Tgi) Further, in the above Fox formula, Tg represents the glass transition temperature (unit: K) of the copolymer, and Wi represents the weight fraction of the monomer i in the copolymer (weight basis The copolymerization ratio), Tgi represents the glass transition temperature (unit: K) of the homopolymer of monomer i. As the glass transition temperature of the homopolymer used for the calculation of Tg, the values described in the publicly known materials are used. For example, regarding the monomers listed below, the following values are used as the glass transition temperature of the homopolymer of the monomer. 2-ethylhexyl acrylate-70°C n-butyl acrylate-55°C ethyl acrylate-22°C methyl acrylate 8°C methyl methacrylate 105°C 2-hydroxyethyl acrylate-15°C 4-hydroxybutyl acrylate -40°C Vinyl acetate 32°C Styrene 100°C Acrylic acid 106°C Methacrylic acid 228°C For the glass transition temperature of the homopolymer other than the above, use the “Polymer Handbook” (3rd edition, John) The values stated by John Wiley & Sons, Inc., 1989. Regarding the monomers in which a plurality of values are described in the literature, the highest value is employed. When the glass transition temperature of the homopolymer is not described in the above document, the value obtained by the following measurement method is used. Specifically, 100 parts by weight of a monomer, 0.2 parts by weight of 2,2'-azobisisobutyronitrile, and ethyl acetate as a polymerization solvent are charged into a reactor equipped with a thermometer, a stirrer, a nitrogen gas introduction tube, and a reflux condenser. 200 parts by weight, and the mixture was stirred for 1 hour while circulating nitrogen gas. After the oxygen in the polymerization system was removed in this manner, the temperature was raised to 63 ° C and the reaction was carried out for 10 hours. Next, it was cooled to room temperature to obtain a homopolymer solution having a solid content concentration of 33% by weight. Then, the homopolymer solution was cast-coated on a release liner, and dried to prepare a test sample (sheet-like homopolymer) having a thickness of about 2 mm. The test sample was punched into a disk shape of 7.9 mm in diameter, and was sandwiched by a parallel plate, and a shear strain of 1 Hz was applied to one side using a viscoelasticity tester (manufactured by TA Instruments Japan, machine name "ARES"). The viscoelasticity was measured by a shear mode at a temperature elevation rate of 5 ° C / min in a temperature range of -70 to 150 ° C, and the peak top temperature of tan δ was taken as the Tg of the homopolymer. The method for obtaining the acrylic polymer is not particularly limited, and various polymerization methods known as a method for synthesizing an acrylic polymer, such as a solution polymerization method, an emulsion polymerization method, a bulk polymerization method, a suspension polymerization method, and a photopolymerization method, can be suitably used. For example, a solution polymerization method can be preferably used. As a monomer supply method at the time of solution polymerization, a one-time loading method, a continuous supply (drop) method, a split supply (drop) method, and the like of all the monomer raw materials can be suitably used. The polymerization temperature can be appropriately selected depending on the type of the monomer and solvent to be used, the type of the polymerization initiator, and the like, and can be, for example, 20 ° C or higher (typically 40 ° C or higher), and can be, for example, 170 ° C. The following (typically below 140 ° C). In a preferred embodiment, a polymerization temperature of substantially 75 ° C or less (more preferably about 65 ° C or less, for example, about 45 ° C to 65 ° C) may be employed. The solvent (polymerization solvent) used in the solution polymerization can be appropriately selected from previously known organic solvents. For example, any one of the following solvents may be used, or a mixed solvent of two or more kinds thereof: an aromatic compound such as toluene (typically an aromatic hydrocarbon); an acetate such as ethyl acetate; a hexane or a ring; An aliphatic or alicyclic hydrocarbon such as hexane; a halogenated alkane such as 1,2-dichloroethane; a lower alcohol such as isopropyl alcohol (for example, a monohydric alcohol having 1 to 4 carbon atoms); a third butylmethyl group; Ethers such as ethers; ketones such as methyl ethyl ketone. The initiator to be used in the polymerization can be appropriately selected from previously known polymerization initiators depending on the kind of the polymerization method. For example, one type or two or more types of azo polymerization initiators such as 2,2'-azobisisobutyronitrile (AIBN) can be preferably used. Examples of other examples of the polymerization initiator include persulfate such as potassium persulfate; peroxide initiators such as benzamidine peroxide and hydrogen peroxide; and substituted ethane substituted by phenyl. An alkane initiator; an aromatic carbonyl compound or the like. Further examples of the polymerization initiator include a redox initiator which is a combination of a peroxide and a reducing agent. These polymerization initiators may be used alone or in combination of two or more. The amount of the polymerization initiator to be used may be a usual amount, and may be, for example, selected from the range of 0.005 to 1 part by weight (typically 0.01 to 1 part by weight) based on 100 parts by weight of all the monomer components. . According to the solution polymerization described above, a polymerization reaction solution in which the acrylic polymer is dissolved in an organic solvent can be obtained. The adhesive layer in the technique disclosed herein may be formed of an adhesive composition comprising the above polymerization reaction solution or an acrylic polymer solution obtained by subjecting the reaction liquid to a suitable post treatment. As the acrylic polymer solution, those having a suitable viscosity (concentration) can be used as needed. Alternatively, an acrylic polymer obtained by synthesizing an acrylic polymer by a polymerization method other than solution polymerization (for example, emulsion polymerization, photopolymerization, bulk polymerization, or the like) and dissolving the acrylic polymer in an organic solvent may be used. Solution. The weight average molecular weight (Mw) of the base polymer (suitably an acrylic polymer) in the technique disclosed herein is not particularly limited and may be, for example, 10×10. ⁴ ~500×10 ⁴ The scope. From the viewpoint of adhesion performance, the Mw of the base polymer is preferably at 10 × 10 ⁴ Above (for example 20×10 ⁴ Above, typically 35×10 ⁴ The range of the above), again, preferably at 150×10 ⁴ Following (for example, 75×10 ⁴ The following, typically 65×10 ⁴ The scope of the following). Here, Mw means a value in terms of standard polystyrene obtained by GPC (gel permeation chromatography). As the GPC device, for example, the device type name "HLC-8320GPC" (column: TSKgelGMH-H (S), manufactured by Tosoh Corporation) can be used. The adhesive in the techniques disclosed herein can be a composition comprising a tackifying resin. The tackifying resin is not particularly limited. For example, a rosin-based tackifying resin, a terpene-based tackifying resin, a hydrocarbon-based tackifying resin, an epoxy-based tackifying resin, a polyamide-based tackifying resin, and an elastic system can be used. Various tackifying resins such as tackifying resins, phenol-based tackifying resins, and ketone tackifying resins. These tackifier resins may be used alone or in combination of two or more. In the case where an acrylic polymer is used as the base polymer, it is preferred to use a rosin-based tackifying resin. Examples of the rosin-based tackifying resin include unmodified rosin (raw rosin) such as rosin gum, wood rosin, and tall oil rosin; and the unmodified rosin is modified by hydrogenation, disproportionation, polymerization, or the like. Modified rosin (hydrogenated rosin, disproportionated rosin, polymerized rosin, other chemically modified rosin, etc., the same below); various other rosin derivatives. Examples of the rosin derivative include those obtained by esterifying an unmodified rosin with an alcohol (that is, an esterified product of rosin), and esterifying the modified rosin with an alcohol. (ie, modified rosin esterified) rosin esters; unsaturated fatty acid modified rosins modified by unsaturated fatty acids on unmodified rosin or modified rosin; by unsaturated fatty acid pairs Unsaturated fatty acid modified rosin ester modified by rosin ester; reduction of carboxyl group in unmodified rosin, modified rosin, unsaturated fatty acid modified rosin or unsaturated fatty acid modified rosin ester Made of rosin alcohol; unmodified rosin, modified rosin, various rosin derivatives and other rosin (especially rosin esters) metal salts; by using acid catalyst in rosin (unmodified rosin, change A rosin phenol resin obtained by adding a phenol and thermally polymerizing it, such as a rosin or a rosin derivative. The softening point (softening temperature) of the tackifying resin to be used is not particularly limited. For example, it is preferred to use a softening point of approximately 100 ° C or higher (preferably approximately 120 ° C or higher). A rosin-based tackifying resin having such a softening point (for example, an esterified product of a polymerized rosin) can be preferably used. The upper limit of the softening point of the tackifier resin is not particularly limited, and may be approximately 200 ° C or less (typically approximately 180 ° C or lower, for example, approximately 150 ° C or lower). In addition, the softening point of the tackifying resin is defined as a value measured by a softening point test method (ring and ball method) prescribed by any one of JIS K 5902 and JIS K 2207. The amount of the tackifying resin to be used is not particularly limited and may be appropriately set depending on the target adhesive property (peel strength, etc.). For example, it is preferable to use a tackifying resin in a ratio of approximately 10 parts by weight or more (more preferably 15 parts by weight or more, further preferably 20 parts by weight or more) based on 100 parts by weight of the base polymer, and more preferably The tackifier resin is used in a ratio of approximately 100 parts by weight or less (more preferably 80 parts by weight or less, still more preferably 60 parts by weight or less). In the techniques disclosed herein, the adhesive composition used to form the adhesive layer may also contain a crosslinking agent as needed. The type of the crosslinking agent is not particularly limited, and can be appropriately selected from previously known crosslinking agents. Examples of such a crosslinking agent include an isocyanate crosslinking agent, an epoxy crosslinking agent, an oxazoline crosslinking agent, an aziridine crosslinking agent, a melamine crosslinking agent, and a peroxide system. Crosslinking agent, urea-based crosslinking agent, metal alkoxide crosslinking agent, metal chelate crosslinking agent, metal salt crosslinking agent, carbon diimide crosslinking agent, amine crosslinking agent Wait. The crosslinking agent may be used alone or in combination of two or more. Among them, from the viewpoint of improving the cohesive force, it is preferred to use an isocyanate crosslinking agent and/or an epoxy crosslinking agent, and it is particularly preferable to use an isocyanate crosslinking agent. The amount of the crosslinking agent used is not particularly limited. For example, it may be substantially 10 parts by weight or less based on 100 parts by weight of the base polymer (preferably an acrylic polymer), and may be preferably from about 0.005 to 10 parts by weight, more preferably from about 0.01 to 5 parts by weight. Choose within the scope. The adhesive layer in the techniques disclosed herein can also be colored to exhibit desired design or optical properties (e.g., light blocking properties, etc.). For the coloring, one type of a known organic or inorganic coloring agent (pigment, dye, etc.) may be used, or two or more types may be used in combination as appropriate. For example, the adhesive layer can be colored black by including a black coloring agent such as carbon black in the adhesive layer. The content of the colorant is not particularly limited, and may be, for example, less than 15 parts by weight based on 100 parts by weight of the base polymer. The content of the colorant is preferably set to less than 10 parts by weight (for example, less than 5 parts by weight, typically less than 3 parts by weight) based on 100 parts by weight of the base polymer, from the viewpoint of suppressing reduction in adhesion characteristics. degree. The techniques disclosed herein are preferably practiced from the standpoint of adhesion properties by the fact that the adhesive layer is substantially free of inorganic and organic colorants. For example, it can be preferably carried out by setting the content of the colorant to 0 to 1 part by weight based on 100 parts by weight of the base polymer. The above adhesive composition may contain an adhesive composition such as a leveling agent, a crosslinking assistant, a plasticizer, a softener, an antistatic agent, an antiaging agent, an ultraviolet absorber, an antioxidant, a light stabilizer, etc., as needed. A variety of additives in general. Regarding such various additives, those previously known can be used according to the conventional practice, and since the features of the present invention are not particularly specified, detailed descriptions are omitted. The adhesive layer (layer containing the adhesive) disclosed herein may be in various forms such as an aqueous adhesive composition, a solvent-based adhesive composition, a hot-melt adhesive composition, or an active energy ray-curable adhesive composition. An adhesive layer formed by the adhesive composition. The water-based adhesive composition is an adhesive composition in the form of an adhesive (adhesive layer-forming component) in a solvent (aqueous solvent) containing water as a main component, and is typically referred to as a water-dispersed type. An adhesive composition (a composition in which at least a part of an adhesive is dispersed in water) or the like. Moreover, the solvent-type adhesive composition means an adhesive composition in the form of an adhesive in an organic solvent. The technique disclosed herein can be preferably carried out by providing an adhesive layer formed of a solvent-based adhesive composition from the viewpoint of adhesion characteristics and the like. The adhesive layer disclosed herein can be formed by previously known methods. For example, a method of directly forming (typically coating) an adhesive composition on a substrate film as described above and drying it to form an adhesive layer (direct method) can be employed. Further, the adhesive composition may be applied to a surface having a peeling property (release surface) and dried to form an adhesive layer on the surface, and the adhesive layer may be transferred onto the substrate film. Method (transfer method). From the viewpoint of productivity, a transfer method is preferred. As the peeling surface, the surface of the release liner or the back surface of the base film which has been subjected to the release treatment can be used. Further, the adhesive layer disclosed herein is typically formed continuously, but is not limited to such a form, and may be, for example, an adhesive layer formed in a regular or random pattern such as a dot shape or a striped shape. The application of the adhesive composition can be carried out, for example, by a conventionally known coater such as a gravure roll coater, a die coater, or a bar coater. Alternatively, the adhesive composition may be applied by an impregnation or a curtain coating method or the like. The drying of the adhesive composition is preferably carried out under heating from the viewpoint of promoting the crosslinking reaction and improving the production efficiency. The drying temperature can be, for example, about 40 to 150 ° C, and usually about 60 to 130 ° C. Further, after the adhesive composition is dried, the composition may be aged for the purpose of adjusting the movement of the components in the adhesive layer, the progress of the crosslinking reaction, and the relaxation of the strain which may be present in the substrate film or the adhesive layer. The thickness of the adhesive layer disclosed herein is not particularly limited and may be appropriately selected depending on the purpose. In general, from the viewpoints of productivity or adhesion performance such as drying efficiency, it is suitably 1 μm or more (for example, 2 μm or more, typically 4 μm or more), and suitably 200 μm or less (for example, 140 μm or less). Typically the extent of 80 μm or less). The thickness is preferably approximately 1 μm or more and 40 μm or less, more preferably 1.2 μm or more and 30 μm or less (for example, 20 μm or less, and typically 10 μm or less) from the viewpoint of the total thickness of the adhesive sheet. The technique disclosed herein can also be carried out by the thickness of the adhesive layer being 5 μm or less (and further 3 μm or less). The adhesive layer having a small thickness is also advantageous in terms of thinning, miniaturization, weight reduction, and resource saving of the adhesive sheet. Further, in the case where the adhesive sheet is applied to the graphite sheet, it is preferable that the thickness of the adhesive layer is thin from the viewpoint of heat dissipation efficiency. <Release liner> In the technique disclosed herein, a release liner can be used in the formation of an adhesive layer, the production of an adhesive sheet, the storage, flow, shape processing, and the like of the adhesive sheet before use. The release liner is not particularly limited, and for example, it can be used as a release liner having a release treatment layer on the surface of a liner substrate such as a resin film or paper, or a fluorine-containing polymer (such as polytetrafluoroethylene) or a poly A release liner of a low-adhesive material of an olefin resin (such as polyethylene or polypropylene). The release treatment layer may be formed by, for example, surface-treating the backing substrate by a release treatment agent such as polyfluorene-based, long-chain alkyl, fluorine or molybdenum sulfide. The release liner used in the one-sided adhesive sheet is typically formed as a peelable surface (peeling treated surface) on the surface abutting against the adhesive sheet, and the other surface may be a non-peeling treated surface. The thickness (total thickness) of the release liner is not particularly limited, but is preferably 10 μm or more (for example, 15 μm or more), and preferably 500 μm or less from the viewpoints of peeling workability, workability, strength, and the like. The degree (for example, 100 μm or less). <Use> The adhesive sheet disclosed herein can be preferably used in portable electronic machine applications. For example, it can be worn on a mobile phone, a smart phone, a tablet computer, a notebook computer, and various wearable devices (for example, a wrist-worn wrist worn on a wrist like a watch, worn on a part of the body by a jig or a strap. The module type includes a goggle type of a glasses type (single-eye type or double-eye type, and also includes a helmet type), and is attached to a shirt type such as a shirt or a sock or a hat in the form of an accessory, and is attached to the ear like a headphone. Upper earmuff type, etc.), digital camera, digital video camera, audio equipment (portable digital music device, IC recorder, etc.), computer (calculator, etc.), portable game machine, electronic dictionary, electronic Protected in portable electronic devices such as notebooks, e-books, vehicle information devices, portable radios, portable TVs, portable printers, portable scanners, portable data modems, etc. The member is preferably utilized for the purpose of imparting design or the like. In addition, in the present specification, the term "carrying" is not sufficient if it can be simply carried, but refers to the portability of a person (standard adult) that can be transported relatively easily. In one preferred embodiment, the adhesive sheets disclosed herein can be applied to a graphite sheet. The graphite sheet can be preferably used as a heat sink for dissipating heat from a heat generating element (battery, IC chip, etc.) in various small electronic apparatuses. For example, the graphite sheet is disposed at a position adjacent to a power generating element such as a battery or an IC chip in the electronic device or around the power generating element. Such a graphite sheet has an uneven appearance and is easily broken by a thinner one. Therefore, the adhesive sheet is preferably attached to the surface thereof for the purpose of improving the appearance and protection. By applying the adhesive sheet disclosed herein to a graphite sheet, an improvement in appearance quality can be preferably achieved. Further, in the case where the back surface of the adhesive sheet has a specific color tone (low brightness, chromaticity) or gloss value, a black color rich in a feeling of gloss can be exhibited, and thus the color tone of the graphite sheet or its peripheral members can be well coordinated. Further, according to the adhesive sheet having a light transmittance of a specific range, the degree of color tone of the graphite sheet can be appropriately reflected to the outer surface, thereby imparting a desired color tone, texture, and design. Further, although not particularly limited, the adhesive sheet disclosed herein can be preferably applied to a graphite sheet having a thickness of 4 μm to 100 μm and/or an arithmetic mean surface roughness Ra of 0.005 μm to 5 μm. . In another preferred embodiment, the adhesive sheets disclosed herein can be applied to a ferrite iron sheet. The fat-grained iron sheet can be preferably used in various electronic apparatuses, for example, as an electromagnetic wave that is absorbed from an electronic device or the like, or a magnetic sheet that absorbs electromagnetic waves that penetrate into an electronic device or the like. For example, the fat iron sheet is disposed between the antenna coil and the conductive member at a position close to the antenna coil in the RFID (Radio Frequency Identification) tag in the electronic device. In such a ferrite-rich iron sheet, a thinner one is brittle and easily broken, so that an adhesive sheet is preferably attached to the surface thereof for protection and the like. By applying the adhesive sheet disclosed herein to the ferrite iron sheet, the ferrite iron sheet is well protected, and the appearance quality is preferably improved. Further, in the case of having a specific color tone (low brightness, chromaticity) or gloss value on the back surface of the adhesive sheet, it is possible to exhibit a black color rich in gloss, and thus it is possible to have a good color tone with the fat iron sheet or its peripheral members. Coordination. Further, according to the adhesive sheet having a light transmittance of a specific range, the color tone of the fat iron sheet can be appropriately reflected to the outer surface, thereby imparting a desired color tone, texture, and design. The matters disclosed by the present specification include the following. (1) An adhesive sheet comprising a base film, an adhesive layer provided on the first surface of the base film, and a one-sided adhesive sheet provided on the colored layer on the second surface of the base film And the back surface of the above-mentioned adhesive sheet is a matte-treated surface having alcohol resistance. (2) The adhesive sheet according to (1) above, wherein an alcohol-resistant layer is provided on a surface of the colored layer. (3) The adhesive sheet according to (2) above, wherein the alcohol-resistant layer comprises a particulate matte material. (4) The adhesive sheet according to (2) or (3) above, wherein the alcohol-resistant layer has a thickness of 2 μm or less. (5) The adhesive sheet according to any one of the above (1), wherein the 60° gloss value of the back surface of the adhesive sheet is 10 or less. (6) The adhesive sheet according to any one of (1) to (5) above, wherein the back side of the adhesive sheet is L ^* a ^* b ^* Brightness L specified by the color system ^* It is 40 or less. (7) An adhesive sheet with a release liner comprising the adhesive sheet according to any one of (1) to (6) above, and a release liner for protecting the adhesive sheet. (8) An adhesive sheet with a release liner, comprising a one-sided adhesive sheet, and a release liner for protecting the adhesive sheet, and the adhesive sheet comprising a base film provided on the base An adhesive layer on the first surface of the material film and a coloring layer formed on the second surface of the base film, and the back surface of the adhesive sheet is a matte-treated surface. (9) The adhesive sheet according to any one of the above (1) to (8) wherein the total thickness of the adhesive sheet is 30 μm or less. (10) The adhesive sheet according to any one of the above (1) to (9), which is attached to a graphite sheet and used. (11) The adhesive sheet according to any one of the above (1), wherein the adhesive layer contains an acrylic polymer in a ratio exceeding 50% by weight of the polymer component contained in the adhesive layer. The acrylic polymer contains, as a monomer component, an alkyl (meth)acrylate represented by the formula (1) in a ratio of 70% by weight or more: CH ₂ =C(R ¹ )COOR ² (1) (R in the above formula (1) ¹ Is a hydrogen atom or a methyl group; again, R ² It is a chain alkyl group having 1 to 20 carbon atoms. (12) The adhesive sheet according to the above (11), wherein the alkyl (meth)acrylate is selected from the group consisting of methyl (meth)acrylate, ethyl (meth)acrylate, and propyl (meth)acrylate, Isopropyl methacrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, second butyl (meth) acrylate, amyl (meth) acrylate, (meth) acrylate Amyl ester, hexyl (meth) acrylate, heptyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, (A) Ethyl acrylate, isodecyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylate, undecyl (meth) acrylate, lauryl (meth) acrylate , tridecyl (meth)acrylate, tetradecyl (meth)acrylate, pentadecyl (meth)acrylate, cetyl (meth)acrylate, (meth)acrylic acid At least one selected from the group consisting of heptadecyl ester, octadecyl (meth)acrylate, nonadecyl (meth)acrylate, and eicosyl (meth)acrylate. (13) The adhesive sheet according to the above (11) or (12), wherein the alkyl (meth)acrylate is n-butyl acrylate and 2-ethylhexyl acrylate. (14) The adhesive sheet according to any one of the above (11) to (13), wherein the alkyl (meth)acrylate is n-butyl acrylate and 2-ethylhexyl acrylate, 2-ethylhexyl acrylate The ester is contained in the above monomer component in a ratio smaller than that of n-butyl acrylate. The adhesive sheet according to any one of the above-mentioned (11), wherein the acrylic polymer further contains a functional group-containing monomer as the monomer component, and the functional group-containing single system is selected from the group consisting of Acrylic acid, methacrylic acid, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, and At least one of the group consisting of 4-hydroxybutyl (meth)acrylate. (16) The adhesive sheet according to any one of (1) to (15), wherein the adhesive layer comprises a rosin-based tackifying resin having a softening point of 100 ° C or more and 180 ° C or less as a tackifying resin, the above-mentioned thickening The content of the resin is 20 to 60 parts by weight based on 100 parts by weight of the base polymer of the above-mentioned pressure-sensitive adhesive layer. The adhesive sheet of any one of the above-mentioned (1) to (16), wherein the base film is a polyethylene terephthalate resin film. (18) The adhesive sheet according to any one of the above (1), wherein the colored layer contains carbon black as a black pigment. (19) The adhesive sheet according to any one of the above (1), wherein the total thickness of the layers other than the adhesive layer is 5 μm or less. (20) The adhesive sheet according to any one of the above (1) to (9), which is attached to a fat iron sheet and used. (21) An adhesive sheet comprising a single-sided adhesive sheet attached to a graphite sheet, comprising: a base film, an adhesive layer provided on the first surface of the base film, and a coloring layer on the second surface of the base film, a back surface of the adhesive sheet having an alcohol-resistant matte finish, an alcohol-resistant layer on the surface of the colored layer, and the alcohol-resistant layer comprising a particulate matte material, The thickness of the alcohol resistant layer is 2 μm or less, and the 60° gloss value of the back surface of the adhesive sheet is 10 or less, and the back surface of the adhesive sheet is L. ^* a ^* b ^* Brightness L specified by the color system ^* 40 or less, the total thickness of the adhesive sheet is 30 μm or less, and the adhesive layer contains an acrylic polymer in an amount exceeding 50% by weight of the polymer component contained in the adhesive layer, and the acrylic polymer is The ratio of 70% by weight or more contains alkyl (meth)acrylate as a monomer component, and the above alkyl (meth)acrylate is n-butyl acrylate and 2-ethylhexyl acrylate, 2-ethylhexyl acrylate The monomer component is contained in the monomer component in a ratio smaller than the n-butyl acrylate, and the acrylic polymer further includes a monomer having a functional group as the monomer component, and the single system containing the functional group is selected from the group consisting of acrylic acid and A Acrylic acid, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, and (methyl) At least one of the group consisting of 4-hydroxybutyl acrylate, the adhesive layer comprising a rosin-based tackifying resin having a softening point of 100 ° C or more and 180 ° C or less as a tackifying resin, and the content of the tackifying resin is Relative to the above adhesive layer 20 to 60 parts by weight based on 100 parts by weight of the base polymer, the base film is a polyethylene terephthalate resin film, and the colored layer contains carbon black as a black pigment, and the total of layers other than the adhesive layer The thickness is 5 μm or less. [Examples] Hereinafter, some examples of the present invention are described, but the present invention is not limited to the examples shown in the examples. In the following description, "parts" and "%" are based on weight unless otherwise specified. <Example 1> In a reaction vessel having a stirrer, a thermometer, a nitrogen introduction tube, a reflux condenser, and a dropping funnel, 70 parts of BA as a monomer component, 27 parts of 2EHA, 3 parts of AA, and 4-hydroxybutyl acrylate were charged. 0.05 part of the ester and 135 parts of toluene as a polymerization solvent were stirred for 2 hours while introducing nitrogen gas. After the oxygen in the polymerization system was removed as described above, 0.1 part of AIBN as a polymerization initiator was added, and solution polymerization was carried out at 60 ° C for 6 hours to obtain a toluene solution of an acrylic polymer. The Mw of the acrylic polymer is about 40×10 ⁴ . A polymerized rosin ester (trade name "PENSEL D-125", softening point: 120 to 130 ° C, manufactured by Arakawa Chemical Industries Co., Ltd.) 30 as a tackifier resin was added to 100 parts of the acrylic polymer contained in the toluene solution. An acrylic pressure-sensitive adhesive composition was prepared by dissolving two portions of an isocyanate-based crosslinking agent (trade name "CORONATE L", manufactured by Tosoh Corporation, and a solid content of 75%). As a release liner, a polyester release film (trade name "DIAFOIL MRF", a thickness of 38 μm, manufactured by Mitsubishi Polyester Co., Ltd.) which was subjected to a release treatment on one side and which was a release surface was prepared. The adhesive composition was applied to the release surface of the release liner so that the thickness after drying became 2 μm, and dried at 100 ° C for 2 minutes. An adhesive layer is formed on the release surface of the release liner as described above. Next, a black printed layer having a thickness of about 1 μm is formed on one side (second surface) of a transparent PET film (trade name "Mylar", manufactured by Teijin DuPont Film Co., Ltd.) having a thickness of 2 μm, and the black printed layer is further prepared. A black printed layer having a top coat layer having a thickness of about 1 μm was formed to form a PET film (top coat layer forming base film). The top coat layer is formed by adding a matting material to the alcohol-resistant resin composition and mixing them on the surface of the black printed layer, and the black printed layer and the top coat layer are all refining from the day. Formed by materials obtained by industrial companies. The adhesive film formed on the peeling liner was bonded to the PET film side surface (the first surface of the PET film layer) of the top coat layer forming substrate film to prepare an adhesive sheet (transfer method) of this example. The release liner directly remains on the adhesive layer for protecting the surface (adhesive surface) of the adhesive layer. <Example 2> The composition of the black printed layer (change of the resin type, etc.) and the composition of the top coat layer (specifically, the amount of the matte material used, etc.) were changed such that the gloss and the color tone of the back surface of the adhesive sheet were changed. 1 The adhesive sheet of this example was produced in the same manner. <Example 3> The composition of the black printing layer (change in the type of resin, reduction in black pigment, etc.) was changed so that the gloss and the color tone of the back surface of the adhesive sheet were changed, and it was used in a commercially available transparent ink composition which does not have alcohol resistance. The top coat layer-forming composition containing the above-mentioned matte material was subjected to the same operation as in Example 1 to produce an adhesive sheet of this example. <Example 4> A PET film was formed using a black printed layer in which a top coat layer was not formed, and the adhesive sheet of this example was produced in the same manner as in Example 1. <Example 5> A composition similar to the top coat layer forming composition used in Example 1 except for the absence of the matte material was prepared, and the black printed layer of the PET film was formed on the black printed layer using the composition containing no matte material. The surface forms a top coat that is free of matting material. The adhesive sheet of this example was produced in the same manner as in Example 1. <Example 6> An adhesive layer was formed on the release surface of the release liner in the same manner as in Example 1 except that the pressure-sensitive adhesive layer was formed to have a thickness of 21 μm after drying. Next, a black printed layer having a thickness of about 5 μm is formed on one side (second surface) of a transparent PET film (trade name "Lumirror", manufactured by Toray Industries, Inc.) having a thickness of 38 μm, and the black printed layer is further prepared. A black printed layer having a top coat layer having a thickness of about 1 μm was formed to form a PET film (top coat layer forming base film). The top coat layer is formed by adding a matting material to the alcohol-resistant resin composition and mixing them on the surface of the black printed layer, and the black printed layer and the top coat layer are all refining from the day. Formed by materials obtained by industrial companies. On the PET film side surface (the first surface of the PET film layer) on which the top coat layer was formed, the adhesive layer formed on the release liner was bonded in the same manner as in Example 1 to prepare the adhesive layer of this example. Sheet (transfer method). The release liner directly remains on the adhesive layer for protecting the surface (adhesive surface) of the adhesive layer. [Evaluation] For each of the adhesive sheets, the 60° gloss value of the back surface and the brightness of the back surface were measured. ^* Chroma a ^* And color b ^* Light transmittance (%), 180 degree peel strength (N/20 mm). The results are shown in Table 1. [Alcohol resistance evaluation test] After the adhesive sheet of each of the above-described examples was allowed to stand for 7 days, a rag containing 20 mL of ethanol (trade name "Savina Minimax", 50 mm × 50 mm, manufactured by KB SEIREN Co., Ltd.) was prepared. Use a fully impregnated part to rub the back of the adhesive sheet slightly more strongly 2 or 3 times. Thereafter, the presence or absence of the change in appearance of the back surface of the adhesive sheet was visually observed. The person who did not find the change in appearance was judged as "acceptable", and the change in appearance (dropping or dissolution of the colored layer, etc.) was judged as "failed". The results are shown in Table 1. [Evaluation of Appearance After Alcohol Supply] Ethanol was attached to the back surface of each of the adhesive sheets and dried. In the case of the non-matting treatment example 5, the case where it is difficult to visually recognize the dry mark of ethanol is evaluated as "○", and the visibility of the dry mark of ethanol is equal or easily recognized as "". ×". The results are shown in Table 1. [Evaluation of interlayer peeling] Each of the adhesive sheets with a release liner attached thereto was rewinded from the roll form to evaluate the presence or absence of interlayer peeling. By visually observing the back surface of the adhesive sheet after the rewinding, the case where no change was found was evaluated as "○", and the case where the change was found (for example, the case where one part of the back surface of the adhesive sheet fell off) was evaluated as "X". The results are shown in Table 1. [Table 1] As shown in Table 1, the adhesive sheets of Examples 1, 2, and 6 which had alcohol resistance on the back surface and which were matte-treated surfaces were compared with Example 5 which had alcohol resistance but had a 60° gloss value of more than 90. The appearance is excellent. Further, in Example 4 in which the top coat was not provided, and Example 3 in which the top coat layer having no alcohol resistance was formed, since it was not resistant to alcohol, it was not suitable for cleaning with alcohol. From these results, it is understood that the appearance quality is improved according to the adhesive sheet having the alcohol resistance on the back surface and being a matte-treated surface. Further, as shown in Table 1, in the adhesive sheet in which the colored layer was formed on the second surface of the base film, the adhesive sheets of Examples 1, 2, and 6 in which the back surface was a matte-treated surface did not produce a base film and color. In the case of interlayer destruction of the layer, in contrast, in Example 4 in which the 60° gloss value of the back surface was high, interlayer damage occurred. As can be seen from the comparison of these examples, in the adhesive sheet in which the colored layer is formed on the second surface of the base film, the back surface of the adhesive sheet is used as the matte-treated surface to prevent interlayer breakage. The specific examples of the present invention have been described in detail above, but these are merely examples, and the scope of the patent application is not limited. The technology described in the scope of the patent application also includes various changes and modifications to the specific examples exemplified above.

1‧‧‧Adhesive film
1A‧‧‧Next
1B‧‧‧Back
10‧‧‧Base film
10A‧‧‧One surface of the substrate film (adhesive layer side surface)
10B‧‧‧The other surface of the substrate film (back side surface)
20‧‧‧Adhesive layer
30‧‧‧Colored layer
40‧‧‧ top coating
40A‧‧‧ surface
50‧‧‧Release liner
50A‧‧‧ outer surface
50B‧‧‧ peeling surface

Fig. 1 is a cross-sectional view schematically showing an example of the configuration of an adhesive sheet.

1‧‧‧Adhesive film

1A‧‧‧Next

1B‧‧‧Back

10‧‧‧Base film

10A‧‧‧One surface of the substrate film (adhesive layer side surface)

10B‧‧‧The other surface of the substrate film (back side surface)

20‧‧‧Adhesive layer

30‧‧‧Colored layer

40‧‧‧ top coating

40A‧‧‧ surface

50‧‧‧Release liner

50A‧‧‧ outer surface

50B‧‧‧ peeling surface

Claims (19)

An adhesive sheet comprising a base film, an adhesive layer provided on the first surface of the base film, and a one-sided adhesive sheet provided on the colored layer on the second surface of the base film, and the above The back side of the adhesive sheet has an alcohol-resistant matte finish. The adhesive sheet of claim 1, wherein an alkali resistant layer is provided on a surface of the colored layer. The adhesive sheet of claim 2, wherein the alcohol-resistant layer comprises a particulate matte material. The adhesive sheet of claim 2 or 3, wherein the alkali-resistant layer has a thickness of 2 μm or less. The adhesive sheet according to any one of claims 1 to 4, wherein the 60° gloss value of the back surface of the adhesive sheet is 10 or less. The adhesive sheet according to any one of claims 1 to 5, wherein a brightness L ^* defined by the L ^* a ^* b ^* color system on the back side of the adhesive sheet is 40 or less. The adhesive sheet according to any one of claims 1 to 6, wherein the total thickness of the adhesive sheet is 30 μm or less. The adhesive sheet according to any one of claims 1 to 7, which is attached to a graphite sheet and used. The adhesive sheet according to any one of claims 1 to 7, which is attached to a fat iron sheet. The adhesive sheet according to any one of claims 1 to 9, wherein the adhesive layer contains an acrylic polymer in an amount exceeding 50% by weight of the polymer component contained in the adhesive layer, and the acrylic polymer The alkyl (meth)acrylate represented by the formula (1) is contained as a monomer component in a ratio of 70% by weight or more: CH ₂ = C(R ¹ )COOR ² (1) (R in the above formula (1) ¹ is a hydrogen atom or a methyl group; further, R ² is a chain alkyl group having 1 to 20 carbon atoms). The adhesive sheet of claim 10, wherein the alkyl (meth)acrylate is n-butyl acrylate and 2-ethylhexyl acrylate. The adhesive sheet of claim 11, wherein 2-ethylhexyl acrylate is contained in the monomer component in a ratio less than n-butyl acrylate. The adhesive sheet according to any one of claims 10 to 12, wherein the acrylic polymer further comprises a functional group-containing monomer as the monomer component, and the functional group-containing single system is selected from the group consisting of acrylic acid and methacrylic acid. 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, and (meth)acrylic acid 4 At least one of the group consisting of -hydroxybutyl ester. The adhesive sheet according to any one of claims 10 to 13, wherein the adhesive layer comprises a rosin-based tackifying resin having a softening point of 100 ° C or more and 180 ° C or less as a tackifying resin, and the content of the tackifying resin is relative to The base polymer of the above adhesive layer is 20 to 60 parts by weight based on 100 parts by weight. The adhesive sheet according to any one of claims 1 to 14, wherein the substrate film is a polyethylene terephthalate resin film. The adhesive sheet according to any one of claims 1 to 15, wherein the colored layer contains carbon black as a black pigment. The adhesive sheet according to any one of claims 1 to 16, wherein a total thickness of the layers other than the adhesive layer in the adhesive sheet is 5 μm or less. An adhesive sheet with a release liner comprising the adhesive sheet according to any one of claims 1 to 17, and a release liner for protecting the adhesive sheet. An adhesive sheet with a release liner, comprising a single-sided adhesive sheet, and a release liner for protecting the adhesive surface of the adhesive sheet, and the adhesive sheet comprises a substrate film and is disposed on the substrate film The adhesive layer on the first surface and the colored layer formed on the second surface of the base film, and the back surface of the adhesive sheet is a matte-treated surface.