JP6622439B1 - Manufacturing method of cut laminated film - Google Patents

Abstract

An object of the present invention is to provide a method for producing a cut laminated film which can suppress delamination of the laminated film due to the cutting process. A cut lamination including a first cutting step of cutting a laminate film by performing an operation of relatively moving a cutting tool in a spiral shape when viewed from a direction perpendicular to a main surface of the laminate film. Film production method. [Selection diagram] Fig. 1

Description

  The present invention relates to a method for producing a cut laminated film.

  In recent years, it has been desired that laminated films used in various fields are processed in shape from the purpose of use, design and the like. However, when processing a laminated film, it is known that defects, such as cracks and delamination, occur in the laminated film (Patent Documents 1 and 2).

JP 2009-037228 A JP, 2006-030331, A

  An object of the present invention is to provide a method for producing a cut laminated film that can suppress delamination of the laminated film due to cutting.

The present invention provides a method for producing a cut laminated film shown below.
[1] A cut laminate including a first cutting step of cutting the laminated film by performing an operation of relatively moving the cutting tool in a spiral shape when viewed from a direction perpendicular to the main surface of the laminated film. A method for producing a film.
[2] The cutting tool has a rotatable handle and an outer peripheral blade,
The manufacturing method according to [1], wherein the outer peripheral blade is integrated with the handle.
[3] The manufacturing method according to [2], wherein, in the first cutting step, an operation is performed in which the cutting tool is relatively moved in a state where the handle is perpendicular to a main surface of the laminated film.
[4] The manufacturing method according to any one of [1] to [3], wherein in the first cutting step, the operation of relatively moving the cutting tool is performed in a direction parallel to the main surface of the laminated film. .
[5] Before the first cutting step, a through hole forming step of forming a through hole penetrating in a direction perpendicular to the main surface of the laminated film;
The manufacturing method according to any one of [1] to [4], further including an arranging step of arranging the cutting tool so as to penetrate the through hole.
[6] The manufacturing method according to [5], wherein, in the through hole forming step, the through hole is formed by relatively moving the cutting tool in a direction perpendicular to the main surface of the laminated film.
[7] The cutting tool has a rotatable handle, an outer peripheral blade, and a bottom blade,
The manufacturing method according to [6], wherein the outer peripheral blade and the bottom blade are each integrated with the handle.
[8] The manufacturing method according to any one of [1] to [7], wherein in the first cutting step, a spiral pitch is 0.01 mm or more and 0.5 mm or less.
[9] The manufacturing method according to any one of [1] to [8], further including a polishing step of polishing the cut portion formed by the first cutting step.
[10] The laminated film obtained by the first cutting step further includes a second cutting step of further cutting by relatively moving the cutting tool in a direction parallel to the main surface of the laminated film. [1] The production method according to any one of [9].
[11] The manufacturing method according to any one of [1] to [10], wherein the laminated film is a film for a display device.
[12] The manufacturing method according to any one of [1] to [11], wherein the laminated film includes a polarizing plate.
[13] The manufacturing method according to any one of [1] to [12], wherein in the first cutting step, a plurality of the laminated films are stacked and cut.

  ADVANTAGE OF THE INVENTION According to this invention, in manufacture of the laminated film cut, the delamination of the laminated film by cutting can be suppressed.

It is the schematic which shows an example of the laminated film cut by the manufacturing method of this invention. In the laminated films shown in (a), (b) and (c), circular, U-shaped and omega-shaped holes are formed, respectively. (A) In a 1st cutting process, it is a top view which shows an example of a mode that a cutting tool moves relatively spirally with respect to a laminated | multilayer film. (B) As a comparative example, it is a top view which shows a mode that a cutting tool moves relatively with respect to a laminated | multilayer film. A line with an arrow in the figure indicates a route along which the cutting tool relatively moves when viewed from a direction perpendicular to the main surface of the laminated film. It is the microscope picture which image | photographed some defects of the laminated | multilayer film produced by cutting in a prior art from the direction perpendicular | vertical with respect to the main surface of a laminated | multilayer film. The upper left part in the figure is a cut hole, and the lower right part is a laminated film. It is a schematic sectional drawing which shows an example of the laminated film which concerns on this invention. It is a schematic sectional drawing which shows another example of the laminated film which concerns on this invention. In an Example, it is a graph which shows the value of the depth of the delamination produced by cutting.

<Cured laminated film>
The cut laminated film has a hole that penetrates in a direction perpendicular to the main surface of the laminated film. The hole is formed by the cutting process. Referring to FIG. 1, the hole portion may be, for example, a circular shape ((a) in FIG. 1), an elliptical shape, a rounded square shape, or the like, and a U-shape (in FIG. It may be a notch such as (b)) or an omega shape ((c) in FIG. 1).

  When the hole is circular, the diameter may be, for example, 1.5 mm or more and 15 mm or less, and preferably 2 mm or more and 10 mm or less. When the hole has an oval or rounded square shape, the radius of curvature of the oval or rounded corner may be, for example, 1 mm or more and 10 mm or less, and preferably 2 mm or more and 10 mm or less. When the hole is a notch, the depth of the notch may be, for example, 1.5 mm or more and 15 mm or less, and preferably 2 mm or more and 10 mm or less.

<Laminated film>
A laminated film is obtained by laminating two or more layers. As a layer which comprises a laminated | multilayer film, a polarizer, a protective film, an optical function layer, an adhesive bond layer, an adhesive layer, a separate film, a surface protective film (protective film) etc. are mentioned, for example. Although the example of a laminated constitution of a laminated film is shown in FIG.4 and FIG.5, a laminated film is not limited to these. In the example of FIG. 4, the laminated film 100 includes the polarizing plate 10, the first pressure-sensitive adhesive layer 20, the optical functional layer 30, the adhesive layer 40, the optical functional layer 31, and the second pressure-sensitive adhesive layer 21. The polarizing plate 10 includes a polarizer 11 and a protective film 12. As shown in FIG. 5, the polarizing plate 10 may include a polarizer 11 and protective films 12 and 13 laminated on both surfaces thereof. The laminated film preferably includes a polarizing plate.

[Polarizer]
The polarizing plate 10 is usually composed of a polarizer 11 and a protective film.
The polarizer 11 is an absorptive polarizer having a property of absorbing linearly polarized light having a vibration plane parallel to the absorption axis and transmitting linearly polarized light having a vibration plane orthogonal to the absorption axis (parallel to the transmission axis). Can be. Examples of the polarizer 11 include a stretched film or stretched layer on which a dye having absorption anisotropy is adsorbed, a layer formed by applying and curing a dye having absorption anisotropy, and the like. Examples of the dye having absorption anisotropy include a dichroic dye. Specifically, iodine or a dichroic organic dye is used as the dichroic dye. Examples of dichroic organic dyes include C.I. I. Dichroic direct dyes composed of disazo compounds such as DIRECT RED 39, and dichroic direct dyes composed of compounds such as trisazo and tetrakisazo are included. The polarizer 11 can be used as the polarizing plate 10 by bonding a protective film to one surface or both surfaces thereof with an adhesive or a pressure-sensitive adhesive.

(Polarizer that is stretched film or stretched layer)
The polarizer 11, which is a stretched film on which a dye having absorption anisotropy is adsorbed, is usually a step of uniaxially stretching a polyvinyl alcohol-based resin film, and by staining the polyvinyl alcohol-based resin film with a dichroic dye, It can be manufactured through a step of adsorbing a dichroic dye, a step of treating a polyvinyl alcohol-based resin film adsorbed with a dichroic dye with an aqueous boric acid solution, and a step of washing with water after the treatment with an aqueous boric acid solution.

  The thickness of the polarizer 11 is usually 30 μm or less, preferably 18 μm or less, more preferably 15 μm or less. Reducing the thickness of the polarizer 11 is advantageous for reducing the thickness of the polarizing plate 10. The thickness of the polarizer 11 is usually 1 μm or more, and may be, for example, 5 μm or more. The thickness of the polarizer 11 can be controlled by, for example, selecting a polyvinyl alcohol-based resin film, adjusting the draw ratio, and the like.

  The polyvinyl alcohol resin can be obtained by saponifying a polyvinyl acetate resin. As the polyvinyl acetate resin, in addition to polyvinyl acetate, which is a homopolymer of vinyl acetate, copolymers of vinyl acetate and other monomers copolymerizable therewith are used. Examples of other monomers copolymerizable with vinyl acetate include unsaturated carboxylic acid compounds, olefin compounds, vinyl ether compounds, unsaturated sulfone compounds, (meth) acrylamide compounds having an ammonium group, and the like. Can be mentioned.

  The degree of saponification of the polyvinyl alcohol-based resin is usually about 85 mol% to 100 mol%, preferably 98 mol% or more. The polyvinyl alcohol-based resin may be modified, and for example, polyvinyl formal and polyvinyl acetal modified with aldehydes can also be used. The degree of polymerization of the polyvinyl alcohol-based resin is usually 1,000 or more and 10,000 or less, preferably 1,500 or more and 5,000 or less.

A polarizer, which is a stretched layer adsorbed with a dye having absorption anisotropy, is usually a step of applying a coating liquid containing the polyvinyl alcohol-based resin on a base film, and a step of uniaxially stretching the obtained laminated film. Dying the polyvinyl alcohol resin layer of the uniaxially stretched laminated film with a dichroic dye to adsorb the dichroic dye to make a polarizer; It can be manufactured through a step of treating with an aqueous acid solution and a step of washing with water after the treatment with an aqueous boric acid solution.
If necessary, the substrate film may be peeled off from the polarizer. The material and thickness of the base film may be the same as the material and thickness of the protective film described later.

An example of the protective film 12 is a thermoplastic resin film.
Examples of thermoplastic resin films include cyclic polyolefin resin films; cellulose acetate resin films made of resins such as triacetyl cellulose and diacetyl cellulose; polyester resin films made of resins such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate. A polycarbonate resin film; a (meth) acrylic resin film; a polypropylene resin film, and the like.

  The thickness of the protective film 12 is preferably thin from the viewpoint of reducing the thickness of the polarizing plate. However, if the thickness is too thin, the strength tends to decrease and the workability tends to be poor. Therefore, the thickness is preferably 5 μm or more and 150 μm or less, more preferably 5 μm. It is 100 μm or less, more preferably 10 μm or more and 50 μm or less.

The protective film 12 can also be a protective film having optical functions such as a retardation film and a brightness enhancement film. For example, a retardation film provided with an arbitrary retardation value by stretching a transparent resin film made of the above material (uniaxial stretching or biaxial stretching) or forming a liquid crystal layer or the like on the film. It can be.
When the laminated film 100 is disposed in the image display device, the laminated film 100 can be bonded to the image display device such that the protective film 12 is on the image display device side.

  A hard coat layer may be formed on the protective film 12. The hard coat layer may be formed on one surface of the protective film, or may be formed on both surfaces. By providing the hard coat layer, the protective film 12 with improved hardness and scratch properties can be obtained. The hard coat layer is, for example, a cured layer of an ultraviolet curable resin. Examples of the ultraviolet curable resin include acrylic resins, silicone resins, polyester resins, urethane resins, amide resins, and epoxy resins. The hard coat layer may contain an additive in order to improve the strength. The additive is not limited, and examples thereof include inorganic fine particles, organic fine particles, or a mixture thereof. As the protective film 13, the description of the protective film 12 is cited.

(A polarizer made by applying and curing a dye having absorption anisotropy)
As the polarizer 11 formed by applying and curing a dye having absorption anisotropy, a composition containing a polymerizable dichroic dye having liquid crystallinity or a composition containing a dichroic dye and a polymerizable liquid crystal is used. Examples thereof include a polarizer containing a cured product of a polymerizable liquid crystal compound such as a layer obtained by applying and curing on a base film.

  In a laminated film, you may peel and remove a base film from a polarizer as needed. The material and thickness of the base film may be the same as the material and thickness of the protective film described above.

  In the laminated film, the above-mentioned protective film may be bonded to one side or both sides of the polarizer 11 obtained by applying and curing a dye having absorption anisotropy.

  The thickness of the polarizer 11 obtained by applying and curing a dye having absorption anisotropy is usually 10 μm or less, preferably 0.5 μm or more and 8 μm or less, more preferably 1 μm or more and 5 μm or less.

[First adhesive layer]
The first pressure-sensitive adhesive layer 20 is a layer that is interposed between the polarizing plate 10 and the optical function layer 30 to bond them. The first pressure-sensitive adhesive layer 20 may be composed of a pressure-sensitive adhesive composition mainly composed of (meth) acrylic resin, rubber-based resin, urethane-based resin, ester-based resin, silicone-based resin, polyvinyl ether-based resin, or the like. it can. Especially, the adhesive composition which uses (meth) acrylic resin excellent in transparency, weather resistance, heat resistance, etc. as a base polymer is suitable. The pressure-sensitive adhesive composition may be an active energy ray curable type or a thermosetting type.

  Examples of the (meth) acrylic resin (base polymer) used in the pressure-sensitive adhesive composition include butyl (meth) acrylate, ethyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and the like. Polymers or copolymers having one or more (meth) acrylic acid esters as monomers as monomers are preferably used. The base polymer is preferably copolymerized with a polar monomer. As polar monomers, (meth) acrylic acid compounds, (meth) acrylic acid 2-hydroxypropyl compounds, (meth) acrylic acid hydroxyethyl compounds, (meth) acrylamide compounds, N, N-dimethylaminoethyl (meth) acrylate compounds And monomers having a carboxyl group, a hydroxyl group, an amide group, an amino group, an epoxy group, etc., such as a glycidyl (meth) acrylate compound.

  The pressure-sensitive adhesive composition may contain only the above base polymer, but usually further contains a crosslinking agent. As a cross-linking agent, a divalent or higher metal ion that forms a carboxylic acid metal salt with a carboxyl group; a polyamine compound that forms an amide bond with a carboxyl group; an ester bond with a carboxyl group Examples include polyepoxy compounds or polyols; polyisocyanate compounds that form amide bonds with carboxyl groups. Of these, polyisocyanate compounds are preferred.

The first pressure-sensitive adhesive layer 20 is formed by preparing a pressure-sensitive adhesive solution by dissolving or dispersing the pressure-sensitive adhesive composition in an organic solvent such as toluene or ethyl acetate, and applying this directly to the target surface of the laminated film. It can be carried out by a method of forming an agent layer, a method of forming a pressure-sensitive adhesive layer in the form of a sheet on a separation film subjected to a release treatment, and transferring it to the target surface of a polarizing plate.
Although the thickness of the 1st adhesive layer 20 is determined according to the adhesive force etc., it may be the range of 1 micrometer or more and 50 micrometers or less, for example, Preferably they are 2 micrometers or more and 40 micrometers or less, More preferably, they are 3 micrometers or more and 30 micrometers or less, Furthermore Preferably they are 3 micrometers or more and 25 micrometers or less.

  The laminated film 100 can include the above-described separate film. The separate film can be a film made of a polyethylene resin such as polyethylene, a polypropylene resin such as polypropylene, or a polyester resin such as polyethylene terephthalate. Among these, a stretched film of polyethylene terephthalate is preferable.

  The first pressure-sensitive adhesive layer 20 includes an optional component, glass fiber, glass bead, resin bead, filler made of metal powder or other inorganic powder; pigment; colorant; antioxidant; ultraviolet absorber; antistatic agent; Can be included.

Examples of the antistatic agent include ionic compounds, conductive fine particles, and conductive polymers, and ionic compounds are preferably used.
The cation component constituting the ionic compound may be an inorganic cation or an organic cation.
Examples of the organic cation include a pyridinium cation, an imidazolium cation, an ammonium cation, a sulfonium cation, a phosphonium cation, a piperidinium cation, and a pyrrolidinium cation. Examples of the inorganic cation include a lithium ion and a potassium ion.
On the other hand, the anionic component constituting the ionic compound may be an inorganic anion or an organic anion, but an anionic component containing a fluorine atom is preferable because it gives an ionic compound having excellent antistatic performance. As an anion component containing a fluorine atom, hexafluorophosphate anion [(PF ₆ ⁻ )], bis (trifluoromethanesulfonyl) imide anion [(CF ₃ SO ₂ ) ₂ N ⁻ ] anion, bis (fluorosulfonyl) imide anion [ _{(FSO 2)} 2 N ^-] anion, and the like.

[Optical function layer]
The optical functional layers 30 and 31 may be layers having optical functions other than the polarizer 11 for imparting a desired optical function. A suitable example of the optical functional layer is a retardation layer. Examples of the retardation layer include a layer that gives a phase difference of λ / 2, a layer that gives a phase difference of λ / 4 (positive A plate), a positive C plate, and the like. The optical functional layer may include an alignment layer and a substrate, or may have two or more liquid crystal layers, alignment layers, and substrates. When the laminated film 100 includes a polarizing layer and a film that gives a retardation of λ / 4, the laminated film 100 may be a circularly polarizing plate.
Although the protective film 12 can also serve as a retardation layer, a retardation layer can be laminated separately from these films. In the latter case, the retardation layer can be laminated on the polarizing plate 10 via an adhesive layer or an adhesive layer.

Examples of the retardation layer include a birefringent film composed of a stretched thermoplastic resin film, the above-described liquid crystal layer formed on a base film, and the like.
The base film is usually a film made of a thermoplastic resin, and an example of the thermoplastic resin is a cellulose ester resin such as triacetyl cellulose.

  Examples of other optical functional films (optical members) that can be included in the laminated film 100 include a light collector, a brightness enhancement film, a reflective layer (reflective film), a semi-transmissive reflective layer (semi-transmissive reflective film), a light diffusion layer ( Light diffusion film).

[Adhesive layer]
The optical function layer 30 and the optical function layer 31 can be bonded via the pressure-sensitive adhesive layer or the adhesive layer 40. The adhesive layer 40 is a known active energy ray curable composition containing a known aqueous composition (including an aqueous adhesive) in which a curable resin component is dissolved or dispersed in water and an active energy ray curable compound. (Including an active energy ray-curable adhesive).

Examples of the resin component contained in the aqueous composition include polyvinyl alcohol resins and urethane resins.
Aqueous compositions containing polyvinyl alcohol resins are curable components such as polyhydric aldehydes, melamine compounds, zirconia compounds, zinc compounds, glyoxal, glyoxal derivatives, water-soluble epoxy resins in order to improve adhesion and adhesion. And a crosslinking agent.
Examples of the aqueous composition containing a urethane resin include an aqueous composition containing a polyester ionomer type urethane resin and a compound having a glycidyloxy group. The polyester ionomer type urethane resin is a urethane resin having a polyester skeleton, into which a small amount of an ionic component (hydrophilic component) is introduced.

  The active energy ray-curable composition is a composition that is cured by irradiation with active energy rays such as ultraviolet rays, visible light, electron beams, and X-rays.

  The active energy ray curable composition may be a composition containing an epoxy compound that is cured by cationic polymerization as a curable component, and preferably an ultraviolet curable composition containing such an epoxy compound as a curable component. It is a thing. The epoxy compound means a compound having an average of 1 or more, preferably 2 or more epoxy groups in the molecule. Only one type of epoxy compound may be used, or two or more types may be used in combination.

  As an epoxy compound, a hydrogenated epoxy compound (having an alicyclic ring) obtained by reacting an epicyclohydrin with an alicyclic polyol obtained by hydrogenating an aromatic ring of an aromatic polyol. Glycidyl ether of polyol); aliphatic epoxy compound such as polyglycidyl ether of aliphatic polyhydric alcohol or its alkylene oxide adduct; epoxy compound having at least one epoxy group bonded to an alicyclic ring in the molecule A certain alicyclic epoxy-type compound etc. are mentioned.

  The active energy ray-curable composition can contain a radically polymerizable (meth) acrylic compound as a curable component, instead of or together with the epoxy compound. The (meth) acrylic compound is a (meth) acrylate monomer having one or more (meth) acryloyloxy groups in the molecule; obtained by reacting two or more functional group-containing compounds, and at least two in the molecule. And (meth) acryloyloxy group-containing compounds such as (meth) acrylate oligomers having (meth) acryloyloxy groups.

When the active energy ray-curable composition contains an epoxy compound that is cured by cationic polymerization as a curable component, it preferably contains a photocationic polymerization initiator. Examples of the cationic photopolymerization initiator include aromatic diazonium salts; onium salts such as aromatic iodonium salts and aromatic sulfonium salts; iron-allene complexes.
When the active energy ray-curable composition contains a radical polymerizable component such as a (meth) acrylic compound, it preferably contains a photo radical polymerization initiator. Examples of the photo radical polymerization initiator include acetophenone initiator, benzophenone initiator, benzoin ether initiator, thioxanthone initiator, xanthone, fluorenone, camphorquinone, benzaldehyde, anthraquinone and the like.

  The optical function layer 30 and the optical function layer 31 may be bonded via an adhesive layer. As the pressure-sensitive adhesive layer used here, the description of the first pressure-sensitive adhesive layer can be cited.

[Second adhesive layer]
The laminated film 100 has the second pressure-sensitive adhesive layer 21 on the optical functional layer 31 side. The second pressure-sensitive adhesive layer 21 can bond the laminated film 100 to an image display element or another optical member.

  As the pressure-sensitive adhesive, pressure-sensitive adhesive composition, thickness and production method used for the second pressure-sensitive adhesive layer 21, the description given in the section of the first pressure-sensitive adhesive layer 20 is cited. The description of the 1st adhesive layer 20 is quoted also about the separate film used for the 2nd adhesive layer 21, and the arbitrary component which may be contained.

[Surface protective film (protective film)]
The laminated film 100 can include a surface protective film for protecting the surface (typically, the surface of the protective film of the polarizing plate). For example, after a polarizing plate is bonded to an image display element or another optical member, the surface protective film is peeled off and removed together with the pressure-sensitive adhesive layer it has.

A surface protection film is comprised by the base film and the adhesive layer laminated | stacked on it, for example. The above description is cited for the pressure-sensitive adhesive layer.
The resin constituting the base film may be, for example, a polyethylene resin such as polyethylene; a polypropylene resin such as polypropylene; a polyester resin such as polyethylene terephthalate or polyethylene naphthalate; a polycarbonate resin; . Polyester resins such as polyethylene terephthalate are preferable.

  Although it does not specifically limit as thickness of a surface protection film, It is preferable to set it as the range of 20 micrometers or more and 200 micrometers or less. When the thickness of the substrate is 20 μm or more, the laminated film 100 tends to be given strength.

<Method for producing cut laminated film>
The manufacturing method of the laminated film cut according to the present invention (hereinafter also referred to as the manufacturing method of the present invention) relatively moves the cutting tool in a spiral shape when viewed from the direction perpendicular to the main surface of the laminated film. A first cutting step of cutting the laminated film by performing an operation is included. The main surface of the laminated film refers to a surface perpendicular to the thickness direction of the laminated film.

[Cutting tools]
The cutting tool used in the production method of the present invention is not particularly limited as long as it can cut a laminated film. For example, the cutting tool has a rotatable handle and an outer peripheral blade, and the outer peripheral blade is integrated with the handle. A cutting tool is mentioned. A cutting tool having a rotatable handle, an outer peripheral blade, and a bottom blade, each of which is integral with the handle may be used. The outer peripheral blade and the bottom blade may be integrated. An example of such a cutting tool is an end mill.

  The number of outer peripheral blades and bottom blades of the cutting tool is not particularly limited, but is, for example, 1 or more and 6 or less, and may be 2 or 3 or 4. When the number of blades is small, it tends to discharge the shavings, but the rigidity of the cutting tool tends to decrease.

  The rake angles of the outer peripheral edge and the bottom edge of the cutting tool are usually 0 ° or more and less than 20 °, and may be 3 ° or more and less than 15 °. If the rake angle is too large, the blade tends to be chipped.

  The clearance angles of the outer peripheral edge and the bottom edge of the cutting tool are, for example, greater than 0 ° and less than 20 °, and may be 3 ° or more and 15 ° or less. If the clearance angle is 0 °, the laminated film and the blade are rubbed, and if the clearance angle is too large, the blade tends to be chipped.

  The outer peripheral blade may be twisted along the handle. The helix angle of the outer peripheral edge of the cutting tool may be −75 ° or more and 75 ° or less, or may be −65 ° or more and 65 ° or less. If the twist angle is too large, it tends to be difficult to discharge the shavings.

  The outer peripheral blade of the cutting tool preferably constitutes the maximum diameter of the rotating part of the cutting tool. The diameter of the outer peripheral blade of the cutting tool (maximum diameter in the direction perpendicular to the handle) is, for example, 1.0 mm or more and 10 mm or less, preferably 1.5 mm or more and 8 mm or less. If the diameter is too small, the end mill tends to break, and if it is too large, fine cutting becomes difficult.

  The feed rate of the cutting tool is usually 50 mm / min or more and 5000 mm / min or less, and may be 100 mm / min or more, preferably 200 mm / min or more and 3000 mm / min or less.

  Further, the rotational speeds of the outer peripheral blade and the bottom blade of the end mill may be 5000 rpm to 100,000 rpm, 10,000 rpm to 80000 rpm, or 30000 rpm to 60000 rpm. If the rotational speed is slow, delamination of the laminated film tends to occur, and if the rotational speed is too fast, heat may be generated and the laminated film may be damaged.

[First cutting step]
In the first cutting step, for example, as shown in FIG. 2A, the laminated film is removed by performing an operation of relatively moving the cutting tool in a spiral shape when viewed from the direction perpendicular to the main surface of the laminated film. To cut.

  A spiral refers to a curve that turns away from the outside. For example, spirals are spirals with equal pitches (Archimedes spirals, etc.), spirals that become wider as the spirals go outwards (logarithmic spirals, etc.), and the spiral pitches go outward. A spiral (such as a parabolic spiral) that becomes narrower can be used. The spirals with equal pitches of the spirals may be spirals having a radius that increases at regular intervals (for example, a half circle, a quarter circle, etc.) of one round or less. In a part of the circumference of the spiral, there may be a portion where the pitch of the spiral is zero, that is, a portion that is not newly cut from the already cut portion. The operation of relatively moving the cutting tool in a spiral shape is an operation of causing the cutting tool to relatively move outside by an amount corresponding to the pitch width of the spiral in at least a part of the already cut portion. As a result, the outer laminated film is cut by the spiral pitch width in at least a part of the already cut portion.

  The spiral in the first cutting step may be one or more rounds, and preferably at least the outermost circumference when cutting the laminated film is cut by a spiral relative movement.

  According to the present invention, when the laminated film is cut by performing a relative movement of the cutting tool in a spiral shape when viewed from a direction perpendicular to the main surface of the laminated film, the cutting is performed by a relative movement by a combination of a linear motion and a circular motion. Compared with (B in FIG. 2 and the like), delamination of the laminated film can be suppressed. For example, when the laminated film has a retardation film and an adhesive layer or a pressure-sensitive adhesive layer, delamination between the retardation film and the adhesive layer or the pressure-sensitive adhesive layer can be suppressed. Furthermore, when the cutting is performed by relatively moving in a spiral shape, it is possible to shorten the time taken to form a cutting portion having a target size.

  Conventionally, when a laminated film is cut, delamination as shown in FIG. 3 is likely to occur, and defects such as gluing and cracks tend to occur. Here, pasting refers to a state in which a part of the adhesive close to the cutting surface is missing in the adhesive layer in the laminated film. A crack refers to a crack that occurs in a layer of a laminated film, and is likely to occur in a polarizing plate or an optical functional layer. The types of defects such as delamination, glueing, and cracks and the layer in which the defects are generated can be identified by observation under an optical microscope.

  The cutting part formed by the first cutting process has a curved part. When cutting a laminated film into a circle, for example, after relatively moving the cutting tool in a spiral shape while increasing the radius from the center, the cutting tool is cut into a circle with the maximum radius without changing the radius until it touches the already cut part. When the are moved relative to each other, the cut portion becomes circular. For example, when the cutting tool moves relative to each other in a spiral shape to draw a circle with a larger radius every half circumference, if the cutting tool is moved relative to the last half circumference to draw a circle without changing the radius, the laminated film will be circular. Can be formed.

  When the trajectory of the relative movement of the cutting tool in a spiral shape comes into contact with the end surface of the laminated film, the cutting portion can be a U-shaped, omega-shaped or other cut-out portion. The spiral pitch may have a wide portion and a narrow portion in one turn, and the cutting portion can be formed into a shape other than a circle (for example, an ellipse) by repeating such a process.

  In the first cutting step, the laminated film is preferably cut by the outer peripheral blade of the cutting tool coming into contact with the laminated film. When the cutting tool has a rotatable handle, the rotatable handle may be perpendicular to or inclined with respect to the main surface of the laminated film, but preferably with respect to the main surface of the laminated film. Perform an operation to move the cutting tool relatively in a vertical state. Thereby, the cut surface becomes perpendicular to the main surface of the laminated film.

  In the first cutting step, the operation of relatively moving the cutting tool is usually performed in a direction parallel to the main surface of the laminated film. The operation may further involve a movement perpendicular to the main surface of the laminated film. When accompanied by a movement perpendicular to the main surface of the laminated film, for example, an operation of relatively moving the cutting tool in a spiral shape can be mentioned. Cutting performed by relatively moving the cutting tool in a spiral shape may also serve as formation of a through-hole described later.

  In the first cutting step, the spiral pitch is, for example, not less than 0.01 mm and not more than 0.5 mm, preferably not less than 0.02 mm and not more than 0.3 mm, and more preferably not less than 0.03 mm and not more than 0.2 mm. When the spiral pitch is within the above-described range, the laminated film can be cut to a desired size without excessive time. Note that if the spiral pitch is too large, the cut laminated film tends to be defective.

  In the first cutting step, the laminated film may be cut one by one, or a laminated body in which a plurality of laminated films are stacked may be cut. In the first cutting step, when a plurality of laminated films are stacked and cut, the laminated body is configured by performing an operation of moving the cutting tool in a spiral shape when viewed from a direction perpendicular to the main surface of the laminated body. Each laminated film to be cut can be cut. The number of laminated films constituting the laminate may be, for example, 10 or more and 500 or less. The thickness of a laminated body may be 1 mm or more and 50 mm or less, for example in the lamination direction of a laminated film.

[Through hole forming step]
The production method of the present invention preferably further includes a through-hole forming step of forming a through-hole penetrating in a direction perpendicular to the main surface of the laminated film. A through-hole formation process and the following arrangement | positioning process are normally performed before a 1st cutting process. The size of the through hole is equal to or larger than the maximum diameter perpendicular to the handle of the cutting tool so that the cutting tool can be placed in the through hole.

  The through hole is preferably formed by relatively moving the cutting tool in a direction perpendicular to the main surface of the laminated film. For example, when the cutting tool has a rotatable handle and a bottom blade integrated therewith, the laminated tool is cut by the bottom blade by relatively moving the cutting tool in a direction perpendicular to the main surface of the laminated film, A through hole having the same diameter as the maximum diameter perpendicular to the handle of the cutting tool can be formed. In the through-hole forming step, the operation of relatively moving the cutting tool in a direction parallel to the main surface of the laminated film may be performed simultaneously with or independently of the relative movement in the direction perpendicular to the main surface of the laminated film. By this operation, a through hole larger than the maximum diameter orthogonal to the handle of the cutting tool can be formed. Examples of the operation of relatively moving in a direction parallel to the main surface of the laminated film include an operation in which the cutting tool performs a circular motion and a linear motion as seen from a direction perpendicular to the main surface of the laminated film.

  A plurality of laminated films may be stacked to form a laminated body, and the through hole forming step may be performed. In the through-hole forming step, through-holes can be formed in each laminated film constituting the laminated body by relatively moving the cutting tool in a direction perpendicular to the main surface of the laminated body. When performing a through-hole formation process by making a laminated film into a laminated body, a subsequent arrangement | positioning process and a 1st cutting process can be performed with respect to this laminated body in which the through-hole was formed.

  The through hole can also be formed by a known method such as a punching method or a laser method. The through hole formed by the above method is preferably larger than the maximum diameter orthogonal to the handle of the cutting tool.

[Arrangement process]
It is preferable that the manufacturing method of this invention further includes the arrangement | positioning process which arrange | positions a cutting tool so that a through-hole may be penetrated. You may arrange | position so that the outer peripheral blade of a cutting tool may contact the inner side of a through-hole through a through-hole. Specifically, after the through hole is formed, the cutting tool may be arranged so as to penetrate the through hole. When forming a U-shaped or omega-shaped cutout, move the cutting tool relative to the direction parallel to the main surface of the laminated film, and move the cutting tool to place the cutting tool at the starting point of the spiral. May be.

  When the through-hole is formed by the cutting tool, the cutting tool can be arranged so as to penetrate the through-hole by not removing the cutting tool that is relatively moved in the direction perpendicular to the main surface of the laminated film. . After forming the through-hole by moving the cutting tool relative to the direction perpendicular to the main surface of the laminated film, pull the cutting tool out of the through-hole in the vertical direction to remove abrasive debris and place the cutting tool in the through-hole again. May be.

  A plurality of laminated films may be stacked to form a laminated body, and the arranging step may be performed. At this time, a cutting tool is arrange | positioned so that the through-hole formed in each laminated | multilayer film which comprises a laminated body may be penetrated. When performing an arrangement | positioning process with respect to a laminated body, a 1st cutting process can be performed with respect to this laminated body as it is.

[Polishing process]
It is preferable that the manufacturing method of this invention further includes the grinding | polishing process which grind | polishes the cutting part formed by the 1st cutting process or the following 2nd cutting process.

  A plurality of laminated films may be stacked to form a laminate, and the polishing step may be performed. In the polishing step, by cutting the laminate, the cut portion of each laminated film constituting the laminate can be polished. After performing the 1st cutting process or the 2nd cutting process with respect to a laminated body, this laminated body can be grind | polished as it is.

  The method of polishing is not particularly limited as long as the cut surface can be smoothed. However, the polishing method is a rubbing method with abrasive paper (sandpaper), polishing cloth, fine particle abrasive, grindstone, electropolishing method, and solvent. The chemical polishing method that has been used. The cutting surface may be polished by using a cutting tool such as an end mill used in the first cutting process, by reducing the feed rate, reducing the polishing amount, or both. In addition, it is possible to remove dirt, dust and the like from the previous steps by polishing.

[Second cutting process]
The manufacturing method of the present invention may further include a second cutting step of further cutting by moving the cutting tool relative to the laminated film obtained by the first cutting step in a direction parallel to the main surface of the laminated film. Good.

  A plurality of laminated films may be stacked to form a laminated body, and the second cutting step may be performed. In the second cutting step, by performing an operation of relatively moving the cutting tool in a direction parallel to the main surface of the laminated body, each laminated film constituting the laminated body is further cut. You may perform a 1st cutting process with respect to a laminated body, and may perform a 2nd cutting process with respect to this laminated body as it is.

  A laminated film cut into a target shape can be obtained by further performing the second cutting step from the cutting portion formed by the first cutting step. For example, when a circular hole is formed in the first cutting process, a cut-out portion such as a U-shape or an omega shape is formed by cutting a curve or a straight line from the hole toward the end face of the laminated film. can do.

<Application of cut laminated film>
The cut laminated film obtained by the production method of the present invention can be used for various display devices. A display device is a device having a display element and includes a light-emitting element or a light-emitting device as a light-emitting source. Examples of the display device include a liquid crystal display device, an organic EL display device, an inorganic electroluminescence (hereinafter also referred to as inorganic EL) display device, an electron emission display device (for example, a field emission display device (also referred to as FED), and a surface field emission display device. (Also referred to as SED)), electronic paper (display device using electronic ink or electrophoretic elements), plasma display device, projection display device (eg, grating light valve (also referred to as GLV) display device, digital micromirror device (DMD) Display device) and a piezoelectric ceramic display. The liquid crystal display device includes both a transmissive liquid crystal display device and a transflective liquid crystal display device. These display devices may be a display device that displays a two-dimensional image, or may be a stereoscopic display device that displays a three-dimensional image.

  A front plate, a touch sensor panel, a back plate and the like can be further provided on the cut laminated film, and can be applied to a display device.

[Front plate]
The front plate is preferably a plate-like body that can transmit light. The front plate may be composed of only one layer or may be composed of two or more layers.
Examples of the front plate include a glass plate (glass plate, flexible thin glass, etc.), a resin plate (resin plate, resin sheet, resin film (sometimes referred to as window film)), and the like. And a plate-like body exhibiting flexibility is preferable. Among these, a resin plate-like body such as a resin film is preferable. The term “flexibility” means that it can be repeatedly bent or bent.

An example of the resin plate-like body is a resin film made of a thermoplastic resin. Thermoplastic resins include polyolefin resins such as chain polyolefin resins (polyethylene resins, polypropylene resins, polymethylpentene resins, etc.) and cyclic polyolefin resins (norbornene resins, etc.); celluloses such as triacetyl cellulose Polyresins; Polyester resins such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate; Polycarbonate resins; Ethylene-vinyl acetate resins; Polystyrene resins; Polyamide resins; Polyetherimide resins; Polymethyl (meth) acrylate resins (Meth) acrylic resins such as: polyimide resins; polyethersulfone resins; polysulfone resins; polyvinyl chloride resins; polyvinylidene chloride resins; polyvinyl alcohol resins; Acetal resins; polyether ketone resins; polyether ether ketone resins; poly (ether sulfone) resins; polyamide-imide resins.
A thermoplastic resin can be used individually or in mixture of 2 or more types.
Among these, from the viewpoints of flexibility, strength, and transparency, polyimide resins, polyamide resins, and polyamideimide resins are preferably used as the thermoplastic resin that constitutes the front plate.

  The front plate may be a film in which a hard coat layer is provided on at least one surface of the base film to further improve the hardness. As the base film, the above-described resin film can be used.

  The hard coat layer may be formed on one surface of the base film, or may be formed on both surfaces. By providing the hard coat layer, hardness and scratch properties can be improved. The thickness of the hard coat layer may be, for example, from 0.1 μm to 30 μm, preferably from 1 μm to 20 μm, more preferably from 5 μm to 15 μm.

  The hard coat layer is, for example, a cured layer of an ultraviolet curable resin. Examples of the ultraviolet curable resin include (meth) acrylic resins, silicone resins, polyester resins, urethane resins, amide resins, and epoxy resins. The hard coat layer may contain an additive in order to improve the strength. Additives are not limited and include inorganic fine particles, organic fine particles, and mixtures thereof.

  The front plate may have not only a function of protecting the front surface (screen) of the display device but also a function as a touch sensor, a blue light cut function, a viewing angle adjustment function, and the like.

  The thickness of the front plate may be, for example, 20 μm or more and 2000 μm or less, preferably 25 μm or more and 1500 μm or less, more preferably 30 μm or more and 1000 μm or less, further preferably 40 μm or more and 500 μm or less, particularly preferably 40 μm or more and 200 μm or less, and even more It may be 40 μm or more and 100 μm or less.

[Touch sensor panel]
The touch sensor panel is not limited as long as it is a panel having a sensor capable of detecting a touched position (that is, a touch sensor). The detection method of the touch sensor is not limited, and touch sensor panels such as a resistive film method, a capacitive coupling method, an optical sensor method, an ultrasonic method, an electromagnetic induction coupling method, and a surface acoustic wave method are exemplified. Since the cost is low, a resistive film type or capacitive coupling type touch sensor panel is preferably used.

  As an example of a resistive film type touch sensor, a pair of substrates opposed to each other, an insulating spacer sandwiched between the pair of substrates, and a transparent conductive film provided as a resistive film on the front surface inside each substrate Examples of the member include a film and a touch position detection circuit. In an image display device provided with a resistive film type touch sensor, when the surface of the front plate is touched, the opposing resistive film is short-circuited, and current flows through the resistive film. The touch position detection circuit detects a change in voltage at this time, and the touched position is detected.

  As an example of the capacitive coupling type touch sensor, a member constituted by a substrate, a position detection transparent electrode provided on the entire surface of the substrate, and a touch position detection circuit can be given. In an image display device provided with a capacitive coupling type touch sensor, when the surface of the front plate is touched, the transparent electrode is grounded via the capacitance of the human body at the touched point. The touch position detection circuit detects the grounding of the transparent electrode, and the touched position is detected.

  The thickness of the touch sensor panel may be, for example, 5 μm or more and 2000 μm or less, preferably 5 μm or more and 100 μm or less, and more preferably 5 μm or more and 50 μm or less.

The touch sensor panel may be a member in which a touch sensor pattern is formed on a base film. The illustration of a base film may be the same as the illustration in description of the above-mentioned protective film. The thickness of the touch sensor pattern may be, for example, 1 μm or more and 20 μm or less.
As the laminated film 100 having a touch sensor panel, for example, a laminated film having a substrate (preferably a front plate, more preferably a flexible front plate), a touch sensor, and a polarizing layer in this order, or a substrate (preferably A laminated film having a front plate, more preferably a flexible front plate), a polarizing layer, and a touch sensor in this order.

[Back plate]
As the back plate, for example, you may have the plate-shaped body which can permeate | transmit light. The back plate may be composed of only one layer or may be composed of two or more layers.
As the back plate, for example, a glass plate (a glass plate, a glass film, etc.) and a resin plate (eg, a resin plate, a resin sheet, a resin film, etc.) can be used, for example.
Among the above, from the viewpoint of flexibility of the laminated film 100 and a display device including the laminated film 100, it is preferable to show flexibility, and a resin-made plate-like body that exhibits flexibility is preferable. An example of the resin plate-like body is a resin film made of a thermoplastic resin. For specific examples of the thermoplastic resin, the description of the front plate is cited. The thermoplastic resin is preferably a cellulose resin, a (meth) acrylic resin, a cyclic polyolefin resin, a polyester resin, a polycarbonate resin, or the like.

  The back plate may be a base film to which a polymerizable liquid crystal compound is applied.

  When the back plate is a plate-like body capable of transmitting light, the thickness is preferably 15 μm or more and 200 μm or less, more preferably 20 μm or more and 150 μm or less, and still more preferably, from the viewpoint of reducing the thickness of the laminated film 100. Is 30 μm or more and 130 μm or less.

  The thickness of the laminated film is not particularly limited because it varies depending on the function required for the laminated film and the use of the laminated film, but may be, for example, 25 μm or more and 1000 μm or less, preferably 100 μm or more and 500 μm or less, more preferably 100 μm or more and 300 μm or less.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not limited to these.

(Production Example 1)
A polyvinyl alcohol film having an average degree of polymerization of about 2400 and a saponification degree of 99.9 mol% or more and a thickness of 20 μm is uniaxially stretched about 4 times in a dry manner, and further kept in a tensioned state at 40 ° C. for 1 minute. After soaking, it was immersed in an aqueous solution having a weight ratio of iodine / potassium iodide / water of 0.1 / 5/100 at 28 ° C. for 60 seconds. Thereafter, it was immersed in an aqueous solution having a weight ratio of potassium iodide / boric acid / water of 10.5 / 7.5 / 100 at 68 ° C. for 300 seconds. Subsequently, after washing with pure water at 5 ° C. for 5 seconds, drying was performed at 70 ° C. for 180 seconds to obtain a polarizer in which iodine was adsorbed and oriented on a uniaxially stretched polyvinyl alcohol film. The thickness of the polarizer was 7 μm.

  A thermoplastic resin film made of a cyclic olefin resin having a thickness of 50 μm is applied to one surface of the obtained polarizer, and each bonding surface is subjected to corona treatment, followed by a photocurable adhesive (epoxy photocuring). The polarizing plate was obtained by adhering via an adhesive).

The same configuration as that shown in FIG. 4 except that the following layers are bonded to the surface opposite to the thermoplastic resin film in the polarizer of the polarizing plate and the second pressure-sensitive adhesive layer 21 is not provided. A laminated film having a thickness of 17 μm was obtained.
First pressure-sensitive adhesive layer 21: thickness 5 μm
Optical functional layer 30: λ / 2 plate composed of a liquid crystal compound-cured layer and an alignment film, thickness 3 μm
Adhesive layer 40: 5 μm thick
Optical functional layer 31: λ / 4 plate composed of a liquid crystal compound cured layer and an alignment film, thickness 3 μm

(Production Example 2)
It does not have the 2nd adhesive layer 21 like manufacture example 1 except having adhered a thermoplastic resin film on both sides of light polarizer, and having pasted an optical functional layer to one thermoplastic resin film. A laminated film having a configuration similar to that shown in FIG. 5 was obtained.

<Example 1>
50 laminated films were laminated to form a laminate. For the cutting, an end mill having a diameter of 2 mm and two blades was used. First, the end mill was moved in a direction perpendicular to the surface of the laminated body, a through hole was formed with the bottom blade of the end mill, and the end mill was disposed so as to penetrate the through hole (through hole forming step and arranging step). Thereafter, as shown in FIG. 2A, the end mill is relatively moved so as to form a spiral when viewed from the direction perpendicular to the surface of the laminate, and the laminated film is cut (first cutting step). A circular hole having a diameter of 3 mm was formed. At this time, the cutting is performed while performing an operation of moving the end mill in a direction parallel to the main surface of the laminated film so that the rotatable pattern of the end mill is perpendicular to the main surface of the laminated film. went. The spiral was set to a circular motion with a radius of 0.05 mm larger every half circumference, and the spiral pitch was 0.10 mm. The feed speed of the end mill was 500 mm / min, and the rotation speed was 50000 rpm.

<Example 2>
In the first cutting step, the laminate was cut in the same manner as in Example 1 except that the feed rate of the end mill was 300 mm / min.

<Example 3>
In the first cutting step, the laminate was cut in the same manner as in Example 1 except that the feed speed of the end mill was 500 mm / min and the rotation speed was 40000 rpm.

<Example 4>
In the first cutting step, the laminate was cut in the same manner as in Example 1 except that the feed rate of the end mill was 500 mm / min and the rotation speed was 30000 rpm.

<Comparative Example 1>
The laminated body was cut in the same manner as in Example 1 except that the moving path of the end mill was different from that in Example 1. First, the end mill was moved in a direction perpendicular to the surface of the laminate, and a through hole was formed with a bottom blade of the end mill. Thereafter, as shown in FIG. 2B, a linear motion of 0.10 mm and a circular motion in which the radius increases by 0.10 mm are repeated, cutting is performed so that the pitch becomes 0.10 mm, and the diameter is 3 mm. A circular hole was formed.

<Comparative Example 2>
Cutting was performed in the same manner as in Comparative Example 1, except that the linear motion distance was increased by 0.05 mm, the circular motion radius was increased by 0.05 mm, and the pitch was 0.05 mm.

<Comparative Example 3>
Cutting was performed in the same manner as in Comparative Example 1 except that the linear motion distance was increased by 0.15 mm, the circular motion radius was increased by 0.15 mm, and the pitch was 0.15 mm.

[Measurement of delamination]
The laminate was roughly divided into three in the laminating direction, and each was made into an upper layer, a middle layer, and a lower layer, one piece was selected from about the center of each layer, and the cut portion of the cut laminated film was observed under an optical microscope. The maximum value of the amount of delamination that occurred (the length of delamination that occurred in the direction of the main surface of the laminated film) was evaluated as “A” for 80 μm or less, “B” for 81 μm to 150 μm, and “C” for 151 μm or more. .

  Table 1 shows the results of cutting the laminated film of Production Example 1 by the methods of Examples 1 to 4 and Comparative Examples 1 and 2.

  Table 2 shows the results of cutting the laminated film of Production Example 2 by the methods of Example 1 and Comparative Examples 1 and 2.

  In both the laminated film of Production Example 1 and the laminated film of Production Example 2, delamination was suppressed in Example 1 as compared with Comparative Example 1 and Comparative Example 2. In Comparative Example 1 and Comparative Example 2, a large amount of delamination was observed particularly in the cut portion where the linear motion was performed. According to the production method of the present invention, it was possible to produce a cut laminated film in which delamination was further suppressed. In Example 1, the occurrence of cracks and glueing was suppressed as compared with Comparative Examples 1 and 2.

  The maximum value of the delamination amount when the laminated film of Production Example 1 is cut by the method described in Examples and Comparative Examples 1 to 3 is shown in FIG. The laminated film was selected from the lower layer of the laminated body.

  From the results of Comparative Examples 1 to 3, it can be seen that in the cutting method in which linear motion and circular motion are repeated, delamination increases as the pitch increases. The laminated film in the lower layer of the laminated body tends to cause delamination due to cutting. In order to suppress delamination, the pitch can be reduced. However, when the pitch is reduced, the time required for cutting is increased until a hole having a desired size is formed. According to the manufacturing method of the present invention, even when the pitch is relatively large, delamination can be suppressed, so that the cutting time can be shortened.

  DESCRIPTION OF SYMBOLS 100 Laminated | multilayer film, 10 Polarizing plate, 11 Polarizer, 12, 13 Protective film, 20 1st adhesive layer, 21 2nd adhesive layer, 30, 31 Optical function layer, 40 Adhesive layer.

Claims (12)

By operating for relatively moving the cutting tool in a spiral shape as viewed from the direction perpendicular to the principal surface of the laminated film, seen including a first cutting step of cutting the laminated film,
The cutting tool has a rotatable handle, an outer peripheral blade, and a bottom blade,
The manufacturing method of the laminated film by which the said outer periphery blade and the said bottom blade were united with the said handle, respectively . The cutting tool has a rotatable handle and an outer peripheral blade,
The manufacturing method according to claim 1, wherein the outer peripheral blade is integrated with the handle.   3. The manufacturing method according to claim 2, wherein in the first cutting step, an operation of relatively moving the cutting tool is performed in a state where the handle is perpendicular to a main surface of the laminated film.   The manufacturing method according to any one of claims 1 to 3, wherein in the first cutting step, the operation of relatively moving the cutting tool is performed in a direction parallel to a main surface of the laminated film. Before the first cutting step, a through hole forming step for forming a through hole penetrating in a direction perpendicular to the main surface of the laminated film;
The manufacturing method of any one of Claims 1-4 further including the arrangement | positioning process which arrange | positions the said cutting tool so that the said through-hole may be penetrated.   The manufacturing method according to claim 5, wherein in the through hole forming step, the through hole is formed by relatively moving the cutting tool in a direction perpendicular to a main surface of the laminated film. Wherein the first cutting step, the pitch of the spiral is 0.01mm or more 0.5mm or less, the production method according to any one of claims 1-6. The first further comprising a polishing step of polishing a cut portion formed by cutting process, the manufacturing method according to any one of claims 1-7. The laminated film obtained by the first cutting step further includes a second cutting step of further cutting by relatively moving the cutting tool in a direction parallel to the main surface of the laminated film. 9. The production method according to any one of 8 above. The laminated film is a film for a display device, a manufacturing method according to any one of claims 1-9. The process according to the laminated film including a polarizing plate, any one of claims 1-10. Wherein the first cutting step, the cutting laminated film overlapping a plurality of A process according to any one of claims 1 to 11.