JP2018157865A - Cleaning method of article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning method of an article, excellent in foreign matter removability of an article having a fine rugged structure on the surface, especially, an article having a moth-eye structure on the surface.SOLUTION: In a cleaning method of an article, a foreign matter adhering to the surface of the article having a fine rugged structure on the surface is removed by an adhesive roller. Preferably, the fine rugged structure agrees with a moth-eye structure. Preferably, an adhesive component of the adhesive roller is polyurethane. Further preferably, the article is an antireflection film.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for cleaning an article.

  At interfaces (surfaces) that come into contact with air, such as various displays, touch panels, and show windows, there is a problem of reduced visibility due to reflection of sunlight, illumination, and the like on the surface. In order to reduce this reflection, an antireflection film may be attached to the surface of the object. Antireflection means include, for example, AR (anti-reflection) including a multilayer structure to which antireflection performance is imparted by interference of reflected waves, AG (anti-glare) that scatters light by a micro-order uneven structure, and below the wavelength of light A moth-eye structure or the like that obtains effective antireflection performance by continuously increasing the refractive index from the refractive index of air to the refractive index of the material by the fine concavo-convex structure of the above-mentioned period. In recent years, the use of an antireflection film containing a moth-eye structure has been proposed because of its superior antireflection performance.

  In general, an antireflection film is incorporated into a product through various processing steps such as cutting to a size according to an object to be attached and attaching it to the object. During the processing step, if there is a scratch, foreign matter, dirt, or the like, there is a problem that the performance of the product is impaired.

  In order to solve the above-mentioned problem, for example, Patent Document 1 discloses a method of covering the surface of an article having a fine concavo-convex structure on the surface with a protective film. Patent Document 2 discloses a method of wiping off the surface of an article having a fine concavo-convex structure on the surface with a cleaning liquid.

International publication 2011/118367 pamphlet International Publication No. 2014/119502 Pamphlet

  However, the method disclosed in Patent Document 1 has a problem that foreign matter, dirt, or the like may adhere to the surface of an article having a fine concavo-convex structure on or after the protective film is peeled off. Moreover, the method disclosed in Patent Document 2 has a problem that the type of cleaning liquid and the type of wiping must be selected for each material of an article having a fine concavo-convex structure on the surface.

  Therefore, the present invention is to solve these problems and to provide a method for cleaning an article having a fine concavo-convex structure on the surface, particularly an article having excellent foreign matter removability of an article having a moth-eye structure on the surface.

The present invention has the following aspects.
[1] A method for cleaning an article, in which foreign matter adhering to the surface of an article having a fine concavo-convex structure is removed with an adhesive.
[2] The method for cleaning an article according to [1], wherein the fine uneven structure is a moth-eye structure.
[3] The method for cleaning an article according to [1] or [2], wherein the adhesive is an adhesive roller.
[4] The method for cleaning an article according to [3], wherein the adhesive component of the adhesive roller is polyurethane.
[5] the adhesive strength of the adhesive roller ^{is 0.1N / cm 2 ~10N / cm 2} , [3]
Or the cleaning method of the article | item as described in [4].
[6] The method for cleaning an article according to any one of [3] to [5], wherein the width of the adhesive roller is 5 mm to 100 mm.
[7] The method for cleaning an article according to any one of [3] to [6], wherein the roller diameter of the adhesive roller is 10 mm to 50 mm.
[8] The method for cleaning an article according to any one of [1] to [7], wherein the article is an antireflection film.

  The method for cleaning an article of the present invention is excellent in the foreign matter removability of an article having a fine concavo-convex structure on its surface, particularly an article having a moth-eye structure on its surface.

It is typical sectional drawing which shows one Embodiment of the cleaning method of the articles | goods of this invention.

The method for cleaning an article of the present invention is a method for removing foreign matter adhering to the surface of an article having a fine concavo-convex structure on the surface with an adhesive.
The foreign substance in the present invention means a small object such as dust or dust that can be a factor that impairs the function of the article.
In FIG. 1, one Embodiment of the cleaning method of the articles | goods of this invention is shown. The method for cleaning an article shown in FIG. 1 is a method in which a foreign substance 30 attached to the surface of an article 10 having a fine concavo-convex structure 11 on the surface is removed by an adhesive roller 20. The adhesive roller 20 is moved while rotating while in contact with the fine concavo-convex structure 11. The foreign matter 30 attached to the fine concavo-convex structure 11 adheres to the outer peripheral surface of the rotating adhesive roller 20 and is removed from the surface of the article 10.

  As an adhesive, an adhesive roller, an adhesive sheet, etc. are mentioned, for example. Among these pressure-sensitive adhesives, a pressure-sensitive adhesive roller is preferable because the pressure-sensitive adhesive does not stick to the surface of the fine concavo-convex structure and is excellent in workability.

(Adhesive roller)
The pressure-sensitive adhesive roller has a pressure-sensitive adhesive component on the outer periphery of the rotation shaft that is orthogonal to the rotational movement direction.

Examples of the material of the adhesive component of the adhesive roller include polyurethane such as urethane gel and urethane rubber; silicone rubber and the like. Among these adhesive component materials, polyurethane is preferable because it is easy to remove adhered foreign substances and can be used repeatedly.
Since the material of the adhesive component of the adhesive roller can cause dirt to adhere to the fine concavo-convex structure, it is preferable not to include a low molecular weight plasticizer or silicone oil.

Adhesive strength of the adhesive ^{roller, 0.1N / cm 2 ~10N / cm} 2 are preferred, more preferably ^{0.5N / cm 2 ~8N / cm 2} , 1N / cm 2 ~3N / cm 2 is more preferable. When the adhesive force of the adhesive roller is 0.1 N / cm ² or more, the adhesive roller has excellent foreign matter capturing ability. Further, when the adhesive force of the adhesive roller is 10 N / cm ² or less, the adhesive roller can be smoothly rotated without being attached to the surface of the fine uneven structure.

  The hardness (Shore A) of the adhesive component of the adhesive roller is preferably 10 ° to 100 °, more preferably 20 ° to 80 °. When the hardness of the pressure-sensitive adhesive component of the pressure-sensitive adhesive roller is 10 ° or more, the pressure-sensitive adhesive roller can be smoothly rotated and moved without sticking to the surface of the fine concavo-convex structure. Further, when the hardness of the adhesive component of the adhesive roller is 100 ° or less, the foreign matter capturing ability of the adhesive roller is excellent.

  The width of the adhesive roller is preferably 5 mm to 100 mm, more preferably 10 mm to 70 mm. When the width of the adhesive roller is 5 mm or more, the surface area of the adhesive component of the adhesive roller is sufficient, and the cleaning time can be shortened. Moreover, it is excellent in the handleability of an adhesive roller as the width | variety of an adhesive roller is 100 mm or less, and an adhesive roller can be rotated and moved smoothly, without an adhesive roller sticking on the surface of a fine concavo-convex structure.

  The diameter of the adhesive roller is preferably 10 mm to 50 mm, more preferably 15 mm to 40 mm. When the diameter of the adhesive roller is 10 mm or more, the surface area of the adhesive component of the adhesive roller is sufficient, and the cleaning time can be shortened. Moreover, when the diameter of the adhesive roller is 50 mm or less, the handleability of the adhesive roller is excellent, and the adhesive roller can be smoothly rotated without sticking to the surface of the fine concavo-convex structure.

(Fine relief structure)
Examples of the fine concavo-convex structure include a prism structure, a microlens structure, and a moth-eye structure. Among these fine concavo-convex structures, the moth-eye structure is preferable because the function deterioration due to foreign matters is large and the effect of the present invention is required.

The fine concavo-convex structure includes a plurality of convex portions and a concave portion formed between the plurality of convex portions.
The average interval between adjacent convex portions of the fine concavo-convex structure is preferably 20 nm to 400 nm, and more preferably 80 nm to 300 nm. When the average interval between adjacent convex portions of the fine concavo-convex structure is 20 nm or more, the convex portions are easily formed when the plurality of pores of the anodized porous alumina are transferred to form the convex portions. In addition, when the average interval between adjacent convex portions of the fine concavo-convex structure is 400 nm or less, when the convex portions are formed by transferring a plurality of pores of anodized porous alumina, the pore interval is increased. The voltage can be suppressed, and anodized porous alumina is easily produced industrially.
In this specification, the average interval between adjacent convex portions is determined by randomly determining the interval between adjacent convex portions (the distance from the center of the convex portion to the center of the adjacent convex portion) using electron microscope observation. Point measurement is performed, and these values are averaged.

The average height of the convex portions is preferably 60 nm to 400 nm, and more preferably 90 nm to 350 nm. When the average height of the convex portions is 60 nm or more, an increase in the minimum reflectance or the reflectance at a specific wavelength can be suppressed, and the antireflection performance is excellent. Further, when the average height of the convex portions is 400 nm or less, the convex portions are easily formed and the convex portions are excellent in scratch resistance.
In this specification, the average height of the convex portion is obtained by randomly measuring the vertical distance between the topmost portion of the convex portion and the bottommost portion of the adjacent concave portion using electron microscope observation. Is the average value.

  The aspect ratio of the protrusions (average height of protrusions / average interval between adjacent protrusions) is preferably 0.8 to 5.0, more preferably 1.2 to 4.0, and 1.5 to 3 0.0 is more preferable. When the aspect ratio of the convex portion is 0.8 or more, the antireflection performance is excellent. In addition, when the aspect ratio of the convex portion is 5.0 or less, the convex portion is easily formed and the scratch resistance of the convex portion is excellent.

Examples of the shape of the convex portion include a cone shape, a pyramid shape, a bell shape, and a columnar shape. These convex portions may be used singly or in combination of two or more. Among these convex shapes, it is possible to continuously increase the refractive index from the air to the surface of the material that forms the fine concavo-convex structure to develop antireflection performance that achieves both low reflectance and low wavelength dependency. Since it can do, the shape which the convex part cross-sectional area of the direction orthogonal to a height direction increases continuously from a top part to a depth direction is preferable, and a cone shape, a pyramid shape, and a bell shape are more preferable.
The convex portion may be one in which a plurality of fine convex portions are combined to form one convex portion.

Examples of the method for producing a fine concavo-convex structure include the following method 1, the following method 2, the following method 3, and the like.
Method 1: Method of forming a fine concavo-convex structure directly on the surface of a substrate by injection molding or press molding using a mold having a reverse structure of a fine concavo-convex structure on the surface Method 2: Mold having an inverted structure of a fine concavo-convex structure The active energy ray-curable composition is cured with the active energy ray-curable composition sandwiched between the substrate and the base material to form a cured resin layer, and then the cured resin layer and the mold are separated. Method Method 3: An active energy ray-curable composition is sandwiched between a mold having an inverted structure of a fine relief structure and a substrate, and the fine relief structure of the mold is transferred to the active energy ray-curable composition. After separating the mold, the active energy ray-curable composition is cured to form a cured resin layer. Among these fine concavo-convex structure manufacturing methods, the fine concavo-convex structure has excellent transferability, and Because of excellent flexibility of the composition, methods 2, preferably Method 3, Method 2 is more preferable.

  As the mold, for example, a mold provided with a reversal structure of fine concavo-convex structure on the surface by lithography, a mold provided with a reversal structure of fine concavo-convex structure on the surface by laser processing, an anodized porous alumina having a plurality of pores And a replica mold replicated by electroforming from a mother mold having a fine concavo-convex structure. Among these molds, a mold in which anodized porous alumina having a plurality of pores is formed on the surface is preferable because it is excellent in antireflection performance and can easily form a large-area fine concavo-convex structure at low cost.

Examples of the lithography method include an electron beam lithography method and a laser interference lithography method.
As a method for producing a mold having a surface with a reverse structure of a fine concavo-convex structure formed by lithography, for example, a photoresist film is applied to the surface of a substrate, exposed to ultraviolet laser, electron beam, X-ray or the like and developed. A method for obtaining a mold having a fine concavo-convex structure comprising a resist pattern on its surface; selectively etching the substrate by dry etching or the like through the resist pattern to remove the resist pattern, thereby Examples include a method of obtaining a mold directly formed on the surface of the material.

  Examples of a method for producing a mold having anodized porous alumina having a plurality of pores on the surface include a method in which aluminum is anodized at a predetermined voltage using oxalic acid, sulfuric acid, phosphoric acid or the like as an electrolyte. Can be mentioned.

Examples of a method for producing a mold having an anodized porous alumina formed on the surface include a method in which aluminum is anodized at a predetermined voltage using oxalic acid, sulfuric acid, phosphoric acid or the like as an electrolyte.
According to the method of anodizing aluminum at a predetermined voltage using oxalic acid, sulfuric acid, phosphoric acid or the like as an electrolyte, high-purity aluminum is anodized at a constant voltage for a long time, and then all or part of the oxide film is temporarily By removing and anodizing again, anodized porous alumina having very highly regular pores formed in a self-organized manner can be formed, which is preferable. Further, by combining the anodizing process and the pore diameter expanding process in the second anodizing step, it is possible to form pores having a triangular or bell-shaped cross section instead of a rectangular cross section. Furthermore, the angle of the innermost part of the pore can be sharpened by appropriately adjusting the time, number of times, conditions and the like of the anodizing treatment and the pore diameter enlargement treatment.
Specific examples of the method for producing a mold having an anodized porous alumina formed on the surface include, for example, the method described in JP-A-2015-129706.

  Examples of the shape of the mold include a flat plate shape, a belt shape, and a roll shape. Among these mold shapes, a belt-like shape and a roll-like shape are preferable because the fine concavo-convex structure can be transferred continuously and the productivity of the substrate is excellent.

The fine concavo-convex structure is preferably composed of a cured resin layer because the fine concavo-convex structure can be more easily formed.
The cured resin layer is a layer made of a cured product of the active energy ray curable composition.

The active energy ray-curable composition is a composition that cures by irradiating active energy rays to advance a polymerization reaction.
Examples of the active energy rays include visible light, ultraviolet rays, electron beams, plasma, heat rays (infrared rays, etc.) and the like. Among these active energy rays, ultraviolet rays and electron beams are preferable, and ultraviolet rays are more preferable because the active energy ray-curable composition is excellent in curability.

  The active energy ray-curable composition preferably contains a polymerizable compound, a polymerization initiator, and, if necessary, other additives.

  Examples of the polymerizable compound include monomers, oligomers, reactive polymers, and the like that include at least one of a radical polymerizable bond and a cationic polymerizable bond in the molecule. These polymerizable compounds may be used alone or in combination of two or more.

Examples of the monomer having a radical polymerizable bond include a monofunctional monomer having a (meth) acryloyl group and a vinyl group, and a polyfunctional monomer having a (meth) acryloyl group and a vinyl group. These monomers having a radical polymerizable bond may be used alone or in combination of two or more.
In this specification, (meth) acryl refers to acryl, methacryl or both.

  Examples of the monomer having a cationic polymerizable bond include monomers having an epoxy group, an oxetanyl group, an oxazolyl group, a vinyloxy group, and the like. These monomers having a cationic polymerizable bond may be used alone or in combination of two or more.

  Examples of the oligomer or reactive polymer containing at least one of radically polymerizable bond and cationically polymerizable bond in the molecule include unsaturated polyester compounds such as a condensate of unsaturated dicarboxylic acid and polyhydric alcohol; polyester (meta Polyether (meth) acrylate; Polyol (meth) acrylate; Epoxy (meth) acrylate; Urethane (meth) acrylate; Cationic polymerization type epoxy compound; Monomer or copolymer of the monomer having the radical polymerizable bond in the side chain Examples thereof include polymers. These oligomers or reactive polymers containing at least one of a radically polymerizable bond and a cationically polymerizable bond in these molecules may be used alone or in combination of two or more.

  Examples of the polymerization initiator include known photopolymerization initiators, known electron beam polymerization initiators, and known thermal polymerization initiators. These polymerization initiators may be used alone or in combination of two or more.

  Other additives include, for example, non-reactive polymers, antioxidants, mold release agents, lubricants, plasticizers, antistatic agents, light stabilizers, flame retardants, flame retardant aids, polymerization inhibitors, UV absorbers Agents, fillers, silane coupling agents, reinforcing agents, inorganic fillers, impact modifiers and the like. These other additives may be used alone or in combination of two or more.

  An active energy ray-curable composition capable of forming a hydrophobic material when water repellency is imparted to the surface of the fine uneven structure (specifically, when the contact angle between the fine uneven structure and water is 90 ° or more). It is preferable to use a fluorine-containing compound or a silicone compound.

  An active energy ray-curable composition capable of forming a hydrophilic material when hydrophilicity is imparted to the surface of the fine relief structure (specifically, when the contact angle between the fine relief structure and water is 25 ° or less). As above, it is preferable to use a tetrafunctional or higher polyfunctional (meth) acrylate and a bifunctional or higher hydrophilic (meth) acrylate in combination.

  Specific examples of the composition of the active energy ray-curable composition include the compositions described in JP2013-175733A and JP2015-129947A.

  As a method of sandwiching the active energy ray-curable composition between the mold and the base material, for example, the mold and the base material are placed in a state where the active energy ray-curable composition is disposed between the mold and the base material. Examples of the method include a method of injecting an active energy ray-curable composition into the fine uneven structure of the mold by pressing.

  Examples of the base material include acrylic resins such as polymethyl methacrylate; polycarbonate resins; styrene resins such as polystyrene and methyl methacrylate-styrene copolymers; cellulose resins such as cellulose diacetate, cellulose triacetate, and cellulose acetate butyrate; Polyester resin such as polyethylene terephthalate; Polyamide resin; Polyimide resin; Polyether sulfone resin; Polysulfone resin; Polyolefin resin such as polypropylene, polymethylpentene, and alicyclic polyolefin; Vinyl chloride resin such as polyvinyl chloride; Polyvinyl acetal resin; Polyetherketone resin; polyurethane resin; glass and the like. Among these materials for the base material, acrylic resin, polycarbonate resin, polyester resin, and cellulose resin are preferable, and polyester resin and cellulose resin are more preferable because of excellent external line transmittance.

  Examples of the form of the substrate include known forms such as a film and a sheet. Among these substrate forms, films and sheets are preferred because of excellent productivity and handling.

  As a manufacturing method of a base material, well-known manufacturing methods, such as an injection molding method, an extrusion molding method, a cast molding method, etc. are mentioned, for example. Among these methods for producing a substrate, an extrusion molding method and a cast molding method are preferable because of excellent productivity.

  The surface of the base material may be subjected to coating treatment, corona treatment, etc. for the purpose of improving properties such as adhesion, antistatic properties, scratch resistance, and weather resistance.

  The method for cleaning an article according to the present invention is excellent in the foreign matter removability of an article having a fine concavo-convex structure on its surface, in particular, an article having a moth-eye structure on its surface. , Can be suitably used in the processing step. When the article is an antireflection film, it can be suitably used in a film punching process, a bonding process to a member such as a touch panel, a member assembling process, and an inspection process in each process.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples.

(Adhesive strength measurement)
The adhesive component of the adhesive roller used in the examples was sandwiched between two stainless steel plates, pulled in the shear direction, and the force when the adhesive component and the stainless steel plate were peeled was defined as the adhesive strength.

(Cleaning workability)
The back surface of the antireflection film having the moth-eye structure obtained in Production Example 3 on its surface and the black acrylic plate were attached via an optical adhesive. Thereafter, the adhesive roller used in the example was moved while rotating while in contact with the surface having a moth-eye structure, and the cleaning workability was evaluated according to the following evaluation criteria.
A: There was no hindrance to rotation and movement of the adhesive roller.
B: The adhesive roller stuck to the surface having a moth-eye structure, and the rotation and movement of the adhesive roller was hindered.

(Foreign substance removal 1)
The back surface of the antireflection film having the moth-eye structure obtained in Production Example 3 on its surface and the black acrylic plate were attached via an optical adhesive. Then, in the state which contacted the surface which has a moth eye structure, it moved by rotating the adhesion roller used in the Example, and cleaned it. Then, the light of the fluorescent lamp was reflected on the surface having a moth-eye structure, and visual observation was performed, and the foreign matter removal property was evaluated according to the following evaluation criteria.
A: There was no difference in the color of the fluorescent lamp between the cleaned surface and the uncleaned surface.
B: There was a difference in the color of the fluorescent lamp between the cleaned surface and the uncleaned surface.

(Foreign substance removal 2)
The back surface of the antireflection film having the moth-eye structure obtained in Production Example 3 on its surface and the black acrylic plate were attached via an optical adhesive. Then, the adhesive roller used in the example was brought into contact with the surface having a moth-eye structure for 1 minute. Thereafter, the adhesive roller was removed from the surface having the moth-eye structure, the light of the fluorescent lamp was reflected on the surface having the moth-eye structure, and visual observation was performed, and the foreign matter removability was evaluated according to the following evaluation criteria.
A: There was no difference in the color of the fluorescent lamp between the contacted surface and the non-contacted surface.
B: There was a difference in the color of the fluorescent lamp between the contacted surface and the non-contacted surface.

[Production Example 1] Mold Production A blanket polishing treatment was performed on a cylindrical aluminum base material having an aluminum ingot having a purity of 99.99% and having an outer diameter of 200 mm, an inner diameter of 155 mm, and a length of 350 mm without any rolling marks. Thereafter, it was electropolished in a perchloric acid / ethanol mixed solution (volume ratio = 1/4) to form a mirror surface.
The obtained aluminum substrate was anodized in a 0.3 M oxalic acid aqueous solution for 10 minutes under the conditions of a direct current of 40 V and a temperature of 16 ° C. Thereafter, the aluminum substrate was immersed in a 6% by mass phosphoric acid / 1.8% by mass chromic acid mixed aqueous solution to remove the oxide film.
The obtained aluminum substrate was anodized in a 0.3 M oxalic acid aqueous solution for 30 seconds under the conditions of a direct current of 40 V and a temperature of 16 ° C.
The obtained aluminum base material on which the oxide film was formed was immersed in a 5% by mass phosphoric acid aqueous solution at 30 ° C. for 8 minutes to carry out pore size enlargement treatment (pore size enlargement treatment step). Thereafter, the aluminum substrate was anodized in a 0.3 M oxalic acid aqueous solution for 30 seconds under conditions of a direct current of 40 V and a temperature of 16 ° C. (oxide film growth step). The pore diameter expansion treatment step and the oxide film growth step are repeated a total of four times, and finally the pore diameter expansion treatment step is performed. As a result, anodized alumina having substantially conical pores with an average interval of 100 nm and a depth of 200 nm is designed. A roll-shaped mold formed on the surface was obtained.

[Production Example 2] Preparation of active energy ray-curable composition 25 parts by mass of dipentaerythritol hexaacrylate, 25 parts by mass of pentaerythritol triacrylate, 25 parts by mass of polyethylene glycol diacrylate, ethylene oxide-modified compound 25 of dipentaerythritol hexaacrylate 1 part by weight of a first photopolymerization initiator (trade name “Irgacure 184”, manufactured by BASF), and a second photopolymerization initiator (trade name “Irgacure 819”, manufactured by BASF) 0.5 parts by mass and 0.1 parts by mass of a release agent (trade name “TDP-2”, manufactured by Nikko Chemicals Co., Ltd.) were added and mixed to prepare an active energy ray-curable composition.

[Production Example 3] Production of antireflection film having moth-eye structure on the surface The roll-shaped mold obtained in Production Example 1 is rotated, and a polyethylene terephthalate substrate (product) is rotated in the direction of rotation of mold A along the outer peripheral surface of the mold. The name “Cosmo Shine A4300”, manufactured by Toyobo Co., Ltd., with a thickness of 75 μm), and the active energy ray curability obtained in Production Example 2 between the outer peripheral surface of the mold and the running substrate. The composition was supplied and irradiated with ultraviolet rays to cure the active energy ray-curable composition. The obtained cured product was peeled from the mold to produce an antireflection film having a moth-eye structure on the surface.

[Example 1]
As an adhesive roller, PR215-ASM (trade name, manufactured by Atom Kosan Co., Ltd., Atom Peta Roller low adhesive type) was used.
Table 1 shows the evaluation results of the shape and material of the adhesive roller and the cleaning method performed.

[Example 2]
As an adhesive roller, PR215-AS (trade name, manufactured by Atom Kosan Co., Ltd., Atom Peta Roller Conductive Type) was used.
Table 1 shows the evaluation results of the shape and material of the adhesive roller and the cleaning method performed.

[Example 3]
As an adhesive roller, EX215-AS (trade name, manufactured by EXCIR Corporation, semiconductive gel roller) was used.
Table 1 shows the evaluation results of the shape and material of the adhesive roller and the cleaning method performed.

[Example 4]
As an adhesive roller, EX316C-AS (trade name, manufactured by EXCIR Corporation, semiconductive gel roller) was used.
Table 1 shows the evaluation results of the shape and material of the adhesive roller and the cleaning method performed.

[Example 5]
As the adhesive roller, APDCR-5A (trade name, manufactured by As One Co., Ltd., As Pure Hand Cleaner) was used.
Table 1 shows the evaluation results of the shape and material of the adhesive roller and the cleaning method performed.

  As can be seen from Table 1, the adhesive roller used in the examples was able to remove foreign matter on the surface of the antireflection film having a moth-eye structure on the surface. In particular, the pressure-sensitive adhesive roller used in Example 1 was extremely excellent in cleaning workability and foreign matter removability with respect to the surface of the antireflection film having a moth-eye structure on the surface.

DESCRIPTION OF SYMBOLS 10 Article 11 Fine uneven structure 12 Base material 20 Adhesive roller 30 Foreign material

Claims (8)

  A method for cleaning an article, in which foreign matter adhering to the surface of an article having a fine concavo-convex structure is removed by an adhesive.   The method for cleaning an article according to claim 1, wherein the fine uneven structure is a moth-eye structure.   The method for cleaning an article according to claim 1 or 2, wherein the adhesive is an adhesive roller.   The method for cleaning an article according to claim 3, wherein the adhesive component of the adhesive roller is polyurethane. The adhesive strength of the adhesive roller ^{is 0.1N / cm 2 ~10N / cm 2} , the cleaning method of an article according to claim 3 or 4.   The method for cleaning an article according to any one of claims 3 to 5, wherein the adhesive roller has a roller width of 5 mm to 100 mm.   The method for cleaning an article according to any one of claims 3 to 6, wherein a roller diameter of the adhesive roller is 10 mm to 50 mm.   The method for cleaning an article according to claim 1, wherein the article is an antireflection film.