WO2020067324A1 - フィルム製造方法及び設備、フィルム - Google Patents
フィルム製造方法及び設備、フィルム Download PDFInfo
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- WO2020067324A1 WO2020067324A1 PCT/JP2019/037930 JP2019037930W WO2020067324A1 WO 2020067324 A1 WO2020067324 A1 WO 2020067324A1 JP 2019037930 W JP2019037930 W JP 2019037930W WO 2020067324 A1 WO2020067324 A1 WO 2020067324A1
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- 238000002834 transmittance Methods 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/007—Processes for applying liquids or other fluent materials using an electrostatic field
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/12—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
- B05D3/102—Pretreatment of metallic substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/06—Polyurethanes from polyesters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
Definitions
- the present invention relates to a method and equipment for producing a film, and a film.
- a window film which has both a design for preventing visual recognition and a property for preventing visual recognition, which is attached to a window of a building (for example, a building, a store building, a house, etc.).
- a window film has a large number of projections formed on the film surface, thereby preventing visibility when viewing the building from one side and the other, and enhancing the design of windows.
- an optical functional film used for digital signage or screen projection is known to have a large number of convex portions.
- Such an optical functional film is required to have both light transmittance and light scattering properties, and it is required to further enhance these functions.
- a method of forming the convex portion on the film material there are a method using screen printing (for example, see Patent Document 1) and a method using ink jet (for example, see Patent Documents 2 and 3).
- the so-called needle dispenser method in which the tip of a nozzle that emits a liquid for forming a convex portion is disposed very close to the film material, and the liquid is applied in a state of being hung over the film material from the tip and adheres to the film material. (See, for example, Patent Document 4).
- JP 2014-12388 A JP 2013-227515 A International Publication No. WO 2010/143524 JP 2017-109481 A
- Patent Literature 1 can form a convex portion on a sheet-like (single-sheet) film material, but continuously form a convex portion on a long film material. Can not do it. Therefore, it is difficult to manufacture a long film having a plurality of convex portions.
- an object of the present invention is to provide a film manufacturing method and equipment for efficiently forming a long film having a plurality of convex portions and a plurality of convex portions, and a film obtained by the method.
- the film manufacturing method of the present invention includes a discharging step and a curing step, and forms a plurality of convex portions on a long film material moving in the longitudinal direction.
- the discharge step is a case in which a liquid containing a photocurable compound is filled therein, and a through hole formed in the case, one end of which is exposed, and the other end of which is a discharge port of the liquid, An opening / closing member that opens and closes one end of the discharge device, the liquid is filled in a pressurized state, and the opening and closing member moves between an open position that opens the one end and a closed position that closes the one end.
- the curing step is provided downstream of the discharge device in the direction of movement of the film material, and uses a light source that emits light to cure the photocurable compound, and cures the photocurable compound in droplets attached to the film material. This makes the droplets convex.
- the opening / closing member has a piezoelectric element, a contact part fixed to the piezoelectric element, and abutting on the discharge port, and a voltage applying part for applying a voltage to the piezoelectric element, and a voltage applied to the piezoelectric element by the voltage applying part. It is preferable that the contact portion be moved between the open position and the closed position by increasing or decreasing.
- the discharging step it is preferable to discharge droplets to a volume in the range of 0.8 ⁇ 10 ⁇ 12 m 3 or more and 100.0 ⁇ 10 ⁇ 12 m 3 or less.
- the viscosity of the liquid is preferably in the range of 20 mPa ⁇ s or more and 1000 mPa ⁇ s or less.
- the light is ultraviolet light
- the photocurable compound is preferably an ultraviolet curable compound.
- the ultraviolet curable compound is preferably an acrylamide compound.
- the photocurable compound preferably contains a light stabilizer. Further, the photocurable compound preferably contains a monofunctional acrylic compound. Further, the photocurable compound preferably contains a polyfunctional acrylate compound.
- the film material is preferably formed of cellulose acylate.
- the film manufacturing equipment of the present invention includes a moving mechanism, a discharge device, and a light source, and forms a plurality of convex portions on a long film material moving in the longitudinal direction.
- the moving mechanism moves the long film material in the longitudinal direction.
- the discharge device is disposed with the discharge port of the liquid containing the photocurable compound facing the moving path of the film material, and discharges the liquid.
- the light source is provided downstream of the discharge device in the moving direction of the film material, and emits light for curing the photocurable compound.
- the discharge device has a case in which a through hole is formed, and an opening / closing member.
- the case is filled with the above liquid under pressure.
- One end of the through hole formed in the case is exposed inside, and the other end is a discharge port.
- the opening / closing member opens the one end, discharges the liquid as a droplet from a discharge port, and flies toward the moving film material to attach it to the film material. It repeatedly moves between the closed position where the
- the film of the present invention has a film material formed of cellulose acylate, a spherical crown-shaped convex portion, a convex portion having a flat top portion, and a convex portion having a concave portion formed on the top portion, on one surface of the film material. And a plurality of units.
- the plurality of convex portions are regularly arranged.
- a long film having a plurality of protruding portions and a plurality of protruding portions can be efficiently obtained.
- FIG. 3 is an explanatory diagram of a discharge device and a light source. It is a schematic sectional drawing of a discharge device. It is a schematic sectional drawing of another convex part. It is a schematic sectional drawing of another convex part. It is a top view of another film. It is a top view of another film. It is explanatory drawing of the shape of the convex part in the evaluation in an Example.
- a film 10 is formed to be long.
- the film 10 includes a long film material 11 and a plurality of protrusions 12.
- the film 10 is a window film which is attached to a window of a building (for example, a building, a store building, a house, and the like) and has a design-preventing property and a light-transmitting property used for digital signage and screen projection. Alternatively, it can be used as an optical functional film having light scattering properties.
- the film material 11 is formed in a so-called flat film shape with both surfaces flat.
- the thickness T11 (unit: ⁇ m) of the film material 11 is not particularly limited, but is preferably in the range of 10 ⁇ m or more and 300 ⁇ m or less from the viewpoint of handleability (handling property), winding property of the film 10 and the like.
- the material of the film material 11 is not particularly limited, but in the case of use as a window film and an optical functional film, it is preferable that the film material 11 is formed of a transparent polymer.
- the film material 11 may contain one or more kinds of various additives such as a plasticizer, an ultraviolet absorber, or fine particles, in addition to the polymer.
- the polymer forming the film material 11 is preferably a thermoplastic resin
- the thermoplastic resin include cellulose acylate, polyethylene terephthalate, acrylic resin, and cyclic polyolefin resin (for example, Arton (registered trademark) manufactured by JSR Corporation). ) Is more preferred.
- cellulose acylate examples include cellulose triacetate (TAC), cellulose diacetate (DAC), cellulose acetate propionate, and cellulose acetate butyrate.
- TAC is particularly preferred.
- TAC is, among cellulose acylates, transparent and has a function of forming the convex portion 12 into a target shape (convex portion forming property), and a convex portion 12 formed of a photocurable resin as described later. This is because the adhesion (adhesion) force is particularly excellent.
- the plurality of protrusions 12 are formed in a form distributed over the entire surface of one surface (hereinafter, referred to as a first surface) 11A of the film material 11, but in FIG. Only is drawn.
- the plurality of protrusions 12 are formed only on the first surface 11A, but may be formed on the other surface 11B (see FIG. 2B).
- the plurality of convex portions 12 are regularly arranged, and in this example, are arranged in a square as shown in FIG.
- the arrangement of the plurality of protrusions 12 is not particularly limited, and may be, for example, a matrix or a so-called irregular arrangement (random arrangement) having no regularity.
- the projection 12 has a spherical crown shape, that is, a semicircular cross section or a bow cross section.
- the protruding portions 12 are arranged in a state separated from each other, but may be in contact with each other. When the centers of the protrusions 12 are separated from each other when the first surface 11A is viewed from a vertical direction, the protrusions 12 may overlap with each other.
- the pitch PW12 (unit: mm) between the protruding portions 12 in the width direction of the film 10 (also the width direction of the film material 11; hereinafter, simply referred to as the “width direction”) is fixed, and
- the pitch PL12 (unit: mm) between the protrusions 12 in the direction (which is also the longitudinal direction of the film material 11 and is hereinafter simply referred to as “longitudinal direction”) is also constant.
- the pitch PW12 is the distance between the centers of the protrusions 12 in the width direction when the first surface 11A is viewed from a perpendicular direction
- the pitch PL12 is the distance between the centers of the protrusions 12 in the longitudinal direction.
- the pitch P12 (unit: mm) is described.
- the plurality of protrusions 12 are formed in the same size as each other, but may be formed in different sizes. Further, the protrusions 12 having different sizes may be arranged with a certain regularity. It is preferable that the diameter RP (unit: ⁇ m) of the convex portion 12 when the first surface 11A is viewed from a perpendicular direction is in the range of 50 ⁇ m or more and 2000 ⁇ m or less. When the diameter RP is 50 ⁇ m or more, compared to the case where the diameter is less than 50 ⁇ m, for example, in the case where the film 10 is used for a window film, the visibility is reduced when viewing the other from one of the outside and the inside of the window. high.
- the convex portion 12 has a circular shape when the first surface 11A is viewed from the vertical direction, but does not have to be a strict circular shape.
- the equivalent circle diameter is the above-described diameter D12. .
- the circle equivalent diameter is a diameter of a circle having the same area.
- the ratio HP / RP obtained by dividing the height HP by the diameter RP is preferably in the range of 0.01 or more and 0.5 or less.
- the ratio HP / RP is 0.01 or more, the light scattering property is increased by the protrusions 12 and the visibility is reduced as compared with the case where the ratio HP / RP is less than 0.01.
- the ratio HP / RP is 0.5 or less, a part of the convex portion 12 is less likely to be scraped off and more difficult to detach during handling of the film 10 than when the ratio is larger than 0.5.
- the convex portion 12 is formed to have a ratio HP / RP of 0.5 or less, the convex portion 12 has a hardening unit 34 described later than when it is formed to have a ratio HP / RP higher than 0.5. There is also a merit that even when it comes into contact with the roll 37B between the and the winding unit 35, it is more difficult to scrape and to separate more easily.
- the height HP is a distance from the first surface 11A to the top of the convex portion 12.
- the convex portion 12 is formed of a cured resin (polymer) that is a polymerization (crosslinking) product obtained by curing a photocurable compound contained in a photocurable composition 15 (see FIG. 3) described later.
- the photocurable compound is a compound that is cured (including cross-linked) by light irradiation, and will be described in detail later.
- As the cured resin a cured resin obtained by curing an ultraviolet curable resin is more preferable.
- the film manufacturing equipment 30 shown in FIG. 3 is an example of equipment for manufacturing the film 10.
- the film 10 is obtained as a film roll 31 wound into a roll.
- the film manufacturing facility 30 includes a delivery unit 32, a discharge unit 33, a curing unit 34, and a winding unit 35 in order from the upstream side in the movement direction Dc of the film material 11.
- Rollers 37A and 37B are provided on a moving path for moving the film material 11.
- a roller 37 ⁇ / b> A is attached to the surface of the film material 11 on which the convex portion 12 is not formed and the surface of the film material 11 on which the convex portion 12 is not formed.
- the roller that comes into contact with the surface is denoted by reference numeral 37B.
- roller 37A when the roller 37A and the roller 37B are not distinguished from each other, the roller 37A is described.
- a rotation mechanism (not shown) may be provided among the plurality of rollers 37, and a driving roller rotated in the circumferential direction by the rotation mechanism may be provided.
- a film material roll 38 in which the film material 11 is wound in a roll shape is set in the delivery unit 32.
- the feeding section 32 includes a rotating shaft 32a on which a film material roll 38 is set, and the rotating shaft 32a is rotated by a rotating mechanism (not shown) to continuously transfer the long film material 11 from the film material roll 38. To send out. By adjusting the rotation speed of the rotation shaft 32a, the movement speed of the film material 11 is adjusted.
- the sending section 32 constitutes a moving mechanism that moves the film material 11 in the longitudinal direction.
- the moving speed of the film material 11 is appropriately set in accordance with the target pitch PL12 and / or the shape of the convex portion 12, but from the viewpoint of forming the convex portion 12 at the target position and surely by the shape. It is preferable to be within the range of 2 m / min to 200 m / min.
- the discharge unit 33 is for forming the droplets 41 to be the protrusions 12 (see FIGS. 1 and 2) on the first surface 11A of the film material 11.
- the discharge unit 33 includes a support roller 42 that supports the film material 11, a discharge unit 44 that discharges the photocurable composition 15 as droplets 41, and the like.
- the supporting roller 42 is a driven roller that rotates when the peripheral surface contacts the film material 11 that moves in the longitudinal direction, around which the film material 11 is wound. Note that a rotation mechanism (not shown) may be provided on the support roller 42, and the rotation shaft 42a may be rotated by the rotation mechanism (not shown).
- the discharge unit 44 includes a plurality of discharge devices 45 for discharging the photocurable composition 15 and a plate-like support member 46 for supporting the plurality of discharge devices 45, for example.
- the number of the ejection devices 45 is determined based on the arrangement of the projections 12 to be formed and the like, and may be one.
- the discharge device 45 arranges a discharge port 45a (see FIGS. 4 and 5) for discharging the photocurable composition 15 in a posture facing the peripheral surface of the support roller 42, which is a part of the moving path of the film material 11. Is done.
- the photocurable composition 15 is intermittently ejected from the ejection port 45a toward the moving film material 11 as droplets. Are sequentially attached in the longitudinal direction (ejection step).
- the film 10 is manufactured through the discharge process in the discharge unit 33. Details of the ejection device 45 will be described later using another drawing.
- the photocurable composition 15 is an example of a liquid containing a photocurable compound, and in this example, is a mixture containing a liquid or solid photocurable compound.
- the photocurable compound may be a liquid, and in that case, the photocurable compound may be used alone. Further, a mixture of a plurality of liquid or solid photocurable compounds may be used as the photocurable composition 15.
- the liquid photocurable compound may be any of a monomer, an oligomer and a polymer, and is used without a solvent, that is, without using a solvent.
- Examples of the photocurable compound include compounds having a photocurable ethylenic double bond group, for example, an acryl group, a styryl group, and the like.
- an ultraviolet-curable compound that is cured by irradiation with ultraviolet light (wavelength of 100 nm or more and 400 nm or less) is preferable, and this is the same in the present example.
- the ultraviolet curable compound has a shorter curing time than other photocurable compounds, and the convex portion 12 having a desired shape is more easily formed. This is because damage to the material 11 can be suppressed more reliably.
- a polyfunctional acrylate compound As the ultraviolet curable compound, a polyfunctional acrylate compound, an acrylamide compound, and / or a monofunctional acrylic compound can be used.
- polyfunctional acrylate compound examples include (meth) acrylate compounds of polyfunctional alcohols, and include alkoxylated polyfunctional (meth) acrylate compounds and oligomers.
- alkoxylated polyfunctional (meth) acrylate compound examples include ethoxylated (3) trimethylolpropane tri (meth) acrylate (a compound obtained by tri (meth) acrylated trimethylolpropane ethylene oxide 3 mol adduct) and propoxylated (3 ) Trimethylolpropane tri (meth) acrylate (a compound obtained by tri (meth) acrylated 3 mol adduct of trimethylolpropane propylene oxide), ethoxylated (2) neopentyl glycol di (meth) acrylate (neopentyl glycol ethylene oxide 2) (2) neopentyl glycol di (meth) acrylate (neopentyl glycol propylene oxide 2 mol adduct is diacrylated) Compound) and the like are preferable.
- ethoxylated (3) trimethylolpropane tri (meth) acrylate a compound obtained by tri (meth) acrylated tri
- polyester (meth) acrylate or urethane (meth) acrylate is preferable.
- acrylamide-based compound hydroxyethyl acrylamide, dimethyl acrylamide, isopropyl acrylamide, diethyl acrylamide, dimethylaminopropyl acrylamide, N-vinyl lactams, specifically N-vinyl pyrrolidone, N-vinyl caprolactam, and the like are also preferable.
- Monofunctional acrylic compounds include isoamyl (meth) acrylate, stearyl (meth) acrylate, lauryl (meth) acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, decyl (meth) acrylate, isoamylstil (meth) acrylate, Isostearyl (meth) acrylate, 2-ethylhexyldiglycol (meth) acrylate, 2-methoxyethyl (meth) acrylate, butoxyethyl (meth) acrylate, methoxydiethylene glycol (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, methoxypropylene Glycol (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, isobornyl (meth) acrylate, 2- (meth) acyl Leoxyethyl
- a monofunctional acrylic compound having a cyclic structure in the molecule is also preferable, and specifically, acryloylmorpholine, benzyl acrylate, tetrahydrofurfuryl (meth) acrylate, isobornyl (meth) acrylate, cyclopentenyl (meth) acrylate, cycloalkyl Pentenyloxyethyl (meth) acrylate, dicyclopentanyl (meth) acrylate, and cyclic trimethylolpropane formal (meth) acrylate are exemplified.
- These monofunctional acrylic compounds having a cyclic structure in the molecule can enhance the solubility of the photopolymerization initiator and the like in the photocurable composition 15 and can enhance the heat resistance of the convex portions 12 after curing. .
- the polyfunctional acrylate compound can improve the hardness and strength of the cured resin product.
- the acrylamide-based compound shortens the time required for curing, and forms the convex portion 12 having improved adhesion to the film material 11.
- the monofunctional acrylic compound adjusts the physical properties of the photocurable composition 15 and also adjusts the light scattering properties such as the refractive index of the projections 12.
- the photocurable composition 15 preferably contains an acrylamide compound as an ultraviolet curable compound. Accordingly, when the film material 11 is formed of cellulose acylate, it is particularly preferable that the protrusions 12 include an acrylamide-based compound among the above because the adhesion to the cellulose acylate is high.
- the photocurable composition 15 preferably contains an acrylamide compound and a polyfunctional acrylate compound as an ultraviolet curable compound.
- an acrylamide compound and a polyfunctional acrylate compound as an ultraviolet curable compound.
- the ejected liquid droplets are quickly cured by light irradiation, and the cured convex portions have sufficient strength. Can be continuously formed.
- the photocurable composition 15 further contains a monofunctional acrylic compound.
- the photopolymerization initiator and the light stabilizer viscosity for rapidly increasing the curability and stability in the photocurable composition 15 can be uniformly dissolved, and the viscosity is adjusted to a desired range, and further, after curing. This is because the strength, durability, and heat resistance of the projection can be increased.
- the photocurable composition 15 preferably has a viscosity in the range of 20 mPa ⁇ s to 1000 mPa ⁇ s.
- the viscosity is 20 mPa ⁇ s or more
- the shape of the droplet 41 is less likely to change during the period from when it adheres to the film material 11 to when it is cured by the curing unit 34 as compared with the case where the viscosity is less than 20 mmPa ⁇ s. Therefore, it is easy to adjust the curing timing, and it is easy to form the convex portion 12 having a desired shape.
- the viscosity of the photocurable composition 15 is more preferably in the range of 30 mPa ⁇ s to 500 mPa ⁇ s, and even more preferably in the range of 40 mPa ⁇ s to 300 mPa ⁇ s.
- a photopolymerization initiator or the like it is preferable to add a photopolymerization initiator or the like to the photocurable composition 15 in order to shorten the curing time or to increase the strength of the projections 12 and / or the adhesion to the film material 11.
- the photopolymerization initiator include acetophenones, benzoins, benzophenones, phosphine oxides, ketals, anthraquinones, thioxanthones, azo compounds, peroxides, 2,3-dialkyldione compounds, disulfide compounds, Examples include fluoroamine compounds, aromatic sulfoniums, lophine dimers, onium salts, borate salts, active esters, active halogens, inorganic complexes, coumarins and the like.
- a light stabilizer examples include nitroso polymerization inhibitors, hydroquinone, methoxyhydroquinone, benzoquinone, p-methoxyphenol, or TEMPO (2,2,6,6-tetramethylpiperidine 1-oxyl), hydroxy TEMPO (hydroxy- 2,2,6,6-tetramethylpiperidine 1-oxyl), cuperon Al, hindered amine and the like.
- HALS hindered amine light stabilizer
- TEMPO hydroxy-TEMPO, etc.
- 4-hydroxyTEMPO 4-hydroxy-2,2,6,6-tetramethylpiperidine 1-). Oxyl
- the amount of the light stabilizer is preferably in the range of 0.05% by mass to 1.0% by mass, and more preferably in the range of 0.1% by mass to 0.8% by mass, based on the photocurable composition 15. Is particularly preferred. Within this range, the stability of the photocurable composition in the ejection device can be increased, the change in viscosity and the curing in the ejection device can be suppressed, and the photocurability of the droplet after ejection is sufficient. Therefore, it is preferable.
- the photocurable compound can adjust the amount of a polyfunctional acrylate compound, an acrylamide compound, or a monofunctional acryl compound, form a mixed liquid mixed with another compound, and adjust the viscosity.
- the viscosity adjusting agent for adjusting the viscosity there are a high-viscosity adjusting agent for further increasing the viscosity and a low-viscosity adjusting agent for lowering the viscosity.
- the high-viscosity adjusting agent is used.
- the above viscosity is the viscosity at the temperature in the discharging step, and in this example, the viscosity is at 25 ° C because the liquid is discharged at room temperature (25 ° C).
- the viscosity is measured by using a tuning-fork type small vibration viscometer CJV5000 (A & D Corporation).
- the curing unit 34 is for forming the projection 12 from the droplet 41.
- the curing unit 34 is provided downstream of the discharge unit 33 in the moving direction of the film material 11, and includes a plurality of light sources 47 that emit light and a plate-like support member 48 that supports the plurality of light sources 47.
- the number of the light sources 47 is determined based on the arrangement of the projections 12 to be formed, the type of the photocurable composition 15, the moving speed of the film material 11, and the like, and may be one.
- the wavelength of the light source 47 is determined by the photocurable composition 15 used. In this example, since the ultraviolet curable compound is used as a component of the photocurable composition 15 as described above, the light source 47 emits ultraviolet light. When the light is emitted from the light source 47, the photocurable compound contained in the droplet 41 attached to the film material 11 is cured, whereby the droplet 41 becomes the convex portion 12 (curing step).
- the film material 11 on which the convex portion 12 is formed moves downstream by the roller 37A and / or the roller 37B, and is sent to the winding portion 35.
- the roller 37 disposed downstream of the curing unit 34 is used to improve the flatness of the film material 11 passing through the curing unit 34 or to adjust the transportability of the film material 11 in the film manufacturing facility 30. , As appropriate.
- the winding unit 35 has a turret arm 56 and winds the film 10 around a winding core 58 set on a winding shaft 57.
- the turret arm 56 is intermittently rotated 180 degrees by an arm driving unit (not shown), and selectively switches the winding core 58 between the winding position PS1 and the winding core exchange position PS2.
- a guide arm 58 is provided at an intermediate position in the rotation direction of the turret arm 56, and a guide roller 61 is attached to each end of the guide arm 58.
- the guide roller 61 supports the film 10 in a state where the film 10 does not contact the turret arm 56 and the arm mounting shaft 62 when the turret arm 56 is rotating.
- the winding shaft 57 is provided at each end of the turret arm 56, and the winding core 58 is set on the winding shaft 57.
- the winding shaft 57 has a rotation mechanism (not shown), and is rotated by the rotation mechanism, and the film 10 is wound around the set core 58.
- the winding shaft 57 constitutes a moving mechanism together with the sending section 32, and moves the film material 11 in the longitudinal direction in cooperation with the sending section 32.
- the moving mechanism is not limited to this example, and as described above, at least a part of the plurality of rollers 37 arranged on the moving path may be a driving roller, and the driving mechanism may be configured with the driving roller.
- the film 10 sent from the roller 37 is wound around the winding core 58. Further, at the core exchange position PS2, the film 10 having a fixed length is wound up, and the film roll 31 which has been fully wound is removed from the winding shaft 57 together with the core 58. The empty core 58 is set, and the core 58 is replaced.
- the film 10 is wound around the winding core 58 from the one end 12A side with the front end in the movement direction Dc as the above-described one end 12A (see FIG. 1), and the film roll 31 is nearly full-length of a predetermined length.
- the turret arm 56 is rotated by 180 degrees, and the film roll 31 near full winding is positioned at the core exchange position PS2.
- An empty winding core 58 is positioned at the winding position PS1.
- a rewinding device (not shown) is operated, and the film 10 is cut.
- the cut preceding film 10 has the rear end in the movement direction Dc as the above-mentioned other end 12B, and the other end 12B is wound around the film roll 31 at the core exchange position PS2. Further, the cut film 10 is wound around the empty core 58 at the winding position PS1 from the one end 12A with the leading end at one end 12A.
- the film 10 is wound around the winding core 58 in the same manner, so that the continuously fed film 10 is obtained as the film roll 31.
- the film manufacturing facility 30 further includes a pulse generator 66, a driver (drive circuit) 67 provided in the discharge device 45, and a system controller 68.
- the pulse generator 66 is connected to the most downstream one of the plurality of rollers 37, that is, the one closest to the winding unit 35.
- the pulse generator 66 generates a pulse each time the connected roller 37 rotates by a predetermined angle, that is, each time the film material 11 is fed by a predetermined length.
- the driver 67 is an example of a voltage application unit that applies a voltage to a piezoelectric element 84 (see FIG. 5) of the ejection device 45 described later.
- the driver 67 drives the ejection device 45 to start and stop ejection of the droplet 41.
- the start of ejection means the start of repeated ejection performed within a certain period of time
- the stop of ejection means the stop of repeated ejection.
- the repetitive ejection is performed at a preset cycle. Therefore, when the set cycle is equal to or longer than the predetermined time, the number of ejections from the start to the stop of the ejection is one. In this manner, the repeated ejection includes the case where the number of ejections is one.
- the system controller 68 controls each part of the film manufacturing equipment 30 in an integrated manner, and forms a target convex part 12 at a target position of the film material 11 by this control.
- the system controller 68 obtains the movement length (conveyance length) of the film material 11 every time a pulse is generated from the pulse generator 66.
- the length of the moving path from the discharge port 45a of the discharge device 45 (see FIGS. 4 and 5) to the roller 37 connected to the pulse generator is input to the system controller 68.
- the position from the front end (corresponding to one end 12A (see FIG. 1)) of the film material 11 passing through the discharge port 45a in the longitudinal direction is detected. Further, the position of the film material 11 forming the projection 12 is input to the system controller 68 in advance, and when the film material 11 passing through the discharge port 45a reaches the target position, the driver 67 is activated.
- the discharge device 45 is driven via the control unit.
- the system controller 68 may determine the length of the film 10 wound around the winding shaft 78 and / or the radius of the film roll 31 based on the pulse. In these cases, the discharge device 45 is driven via the driver 67 when the film material 11 passing through the discharge port 45a reaches a target position based on the obtained length and / or radius.
- the system controller 68 further includes a cycle for discharging the droplet 41, a flow rate of the photocurable composition 15 supplied to the discharging device 45, a volume of the droplet 41, a moving speed of the film material 11, and a film in the winding unit 35.
- the timing of cutting at 10 and / or the timing of rotation of the turret arm 56 are input, and each part of the film manufacturing equipment 30 is controlled based on these input signals.
- the discharge devices 45 of the discharge unit 44 are arranged in a plurality in the width direction.
- the discharge devices 45 to be used are arranged in two rows in the longitudinal direction.
- the arrangement of the ejection device 45 may be appropriately determined based on the size of the ejection device 45, the pitch PW12, and the like, and the ejection device 45 is set so that the pitch PW45 of the ejection port 45a in the width direction becomes the same as the pitch PW. 45 may be arranged.
- the discharge device 45 is arranged over the entire area in the width direction. Further, even when the film 10 is manufactured, the discharge device 45 is provided so as to be movable in the width direction, and a shift mechanism (not shown) that moves the discharge device 45 in the width direction is used. Since it can be displaced, it is not always necessary to provide the plurality of ejection devices 45 over the entire area in the width direction.
- a plurality of light sources 47 of the curing unit 44 are arranged in a line in the width direction.
- the light sources 47 are arranged at positions in the width direction of the discharge ports 45a of the respective discharge devices 45.
- the shape of the droplet 41 on the film material 11 changes until it is cured.
- the shape changes for example, the shape becomes flat (the height is smaller and the diameter R41 is larger), the top of the droplet 41 is flat, or the top of the droplet 41 is concave.
- the shape of the projection 12 formed by curing depends on the shape of the droplet 41. As described above, since the film 10 in this example has a configuration in which the plurality of convex portions 12 are formed in a uniform shape, the curing of the droplets 41 is also started at a constant timing.
- the light sources 47 are arranged in a state where the distance from the discharge port 45a of the discharge device 45 on which the droplet 41 to be irradiated is formed is constant.
- a light source 47 for emitting light toward the droplet 41 formed at 45 is arranged at a position shifted downstream by the pitch PL45 of the discharge port 45a in the longitudinal direction.
- irradiation is started for a certain period of time after being formed on any of the droplets 41, and the convex portions 12 having a uniform shape are formed.
- the number of the light sources 47 arranged in the moving direction is illustrated as three in FIG. 4, this number is required for the moving speed of the film material 11, the viscosity of the photocurable composition 15 (see FIG. 3), and the curing. What is necessary is just to determine suitably according to time etc.
- the shape of the convex portion 12 changes depending on the start timing of curing of the droplet 41 on the film material 11, the shape of the convex portion 12 can be adjusted by using this. That is, the shape of the convex portion 12 can be adjusted by adjusting the moving time of the film material 11 from the discharge device 45 to the light source 47.
- the shape of the convex portion 12 can be adjusted by adjusting the moving time of the film material 11 from the discharge device 45 to the light source 47.
- the moving time of the film material 11 from the discharge device 45 to the light source 47 is determined by either a method of changing the moving speed of the film material 11 or a method of changing the distance L between the discharge device 45 (discharge port 45a) and the light source 47. May be.
- a method of changing the moving speed of the film material 11 or a method of changing the distance L between the discharge device 45 (discharge port 45a) and the light source 47. May be.
- displacing the light source 47 to the upstream side in the moving direction it is possible to form the protruding portion 12 having a higher height and a smaller bottom area, and displacing the light source 47 to the downstream side causes a flatter convex portion.
- the part 12 can be formed.
- the discharge device 45 includes a case 71 and an opening / closing member 72.
- the case 71 includes a case body 73, a bottom member 74, a pressing member 75, O-rings 77a and 77b, a sealing member (packing) 78, and the like, and a state in which the photocurable composition 15 is pressurized inside. Filled with.
- a supply port 73a for the photocurable composition 15 is formed on the side surface of the case body 73, and a supply section 81 that supplies the photocurable composition 15 at a predetermined flow rate is connected to the supply port 73a. .
- the bottom and top surfaces of the case body 73 are open, and the bottom member 74 is fixed to the open portion of the bottom surface, and the pressing member 75 is fixed to the open portion of the top surface.
- the sealing member 78 is provided on the inner surface of the pressing member 75, and prevents the photocurable composition 15 filled therein from leaking together with the O-ring disposed between the sealing member 78 and the pressing member 75.
- the bottom member 74 has a through hole 82 formed therein. One end of the through hole 82 is exposed inside the photocurable composition 15 and the other end is a discharge port 45a.
- the diameter (unit: ⁇ m) of the discharge port 45a is preferably in the range of 30 to 300, more preferably in the range of 50 to 150.
- the opening / closing member 72 is for opening / closing one end on the inner side of the through hole 82.
- the opening / closing member is located between an open position where the one end of the through hole 82 is opened as shown in FIG. 5B and a closed position where the one end is closed as shown in FIG. 5A. It is movable.
- the opening / closing member 72 has a contact portion 83, a piezoelectric element (piezo element) 84, and the above-described driver 67 (see FIG. 3). Is brought into contact with the bottom member 74 in a state of closing.
- the contact portion 83 is fixed via a shaft 85 to a piezoelectric element 84 that is deformed by an applied voltage.
- the contact portion 83 moves between the open position and the closed position by increasing or decreasing the voltage applied by the driver 67 (see FIG. 3).
- the shaft 85 is inserted into each center of the pressing member 75 and the sealing member 78.
- the photocurable composition 15 is supplied into the case 71 from the supply unit 81 at a predetermined flow rate, and the supply unit 81 is filled with the photocurable composition 15 inside the case 81 in a pressurized state.
- the photocurable composition 15 is supplied up to this point. Then, for example, even when the photocurable composition 15 is discharged from the discharge port 45a, the supply unit 81 supplies the photocurable composition 15, and the photocurable composition 15 is pressurized inside. Maintain state.
- the supply unit 81 also functions as a pressurizing mechanism.
- the photocurable composition 15 filled in a pressurized state passes through the one end and goes to the discharge port 45a. Then, by moving the opening / closing member 72 at the open position to the closed position, a small amount of the photocurable composition 15 in the through hole 82 is discharged as the droplet 41.
- the distance between the discharge port 45a and the moving path of the film material 11a is set to be farther than the size of the droplet 41, so that the droplet 41 can fly in space. Thus, the droplet 41 discharged from the discharge port 45a flies from the discharge port 45a toward the film material 11 and adheres.
- the driver 67 adjusts the cycle of discharging each droplet 41, the flow rate of the photocurable composition 15 supplied to the discharging device 45, and the volume of the droplet 41.
- the volume of the droplet 41 can be adjusted by adjusting the timing of the movement of the opening / closing member 72. Specifically, the volume of the droplet 41 can be adjusted by moving the opening / closing member 72 at the closed position to the open position and adjusting the time required to return to the closed position again. Note that the volume of the droplet 41 can also be adjusted by adjusting at least one of the viscosity of the photocurable composition 15 (see FIG. 3) and the pressure of the photocurable composition 15 inside the case 71. .
- the droplet 41 is discharged to a volume in the range of 0.8 ⁇ 10 ⁇ 12 m 3 or more and 100.0 ⁇ 10 ⁇ 12 m 3 or less, that is, the photocurable composition 15 is discharged in a volume of 0.8 ⁇ 10 ⁇ 12 m 3 or less. It is preferable that the liquid be ejected to a volume in the range of 10 ⁇ 10 ⁇ 12 m 3 or more and 100.0 ⁇ 10 ⁇ 12 m 3 or less, and by being within this range, the size of the projection 12 can be more easily adjusted.
- the pitch PL12 of the convex portions 12 is adjusted by adjusting at least one of the cycle of discharging each droplet 41 and the moving speed of the film material 11 (see FIG. 3).
- the above example is the opening / closing member 72 provided with the piezoelectric element 84, but the opening / closing member is not limited to this example.
- an opening / closing member that moves the contact portion urged by a spring by changing the air pressure instead of changing the shape of the piezoelectric element 84 may be used.
- Such a discharge device and a discharge mechanism are called a jet dispenser and a jet dispenser system, and are described in Journal of the Institute of Electronics Packaging, Vol. 7, no. 6 (p. 501), and a commercially available device can be used.
- the spherical crown-shaped convex portion 12 is formed, but the shape of the convex portion 12 may be changed according to the intended function of the film.
- the top part 91a may be a flat convex part 91.
- the top 91a of the projection 91 is a plane substantially parallel to the first surface 11A.
- the top 96a may be a convex 96 that is concave.
- the ratio HP / RP is preferably within the above range.
- the opening and closing of the opening and closing member 72 is stopped during the continuous repetition of the discharge, and the discharge frequency is sufficient. May disappear.
- the mechanism is presumed as follows. That is, since the photocurable composition 15 is repeatedly discharged many times over a long period of time in the discharge device 45, when the opening / closing member 72 reciprocates as shown in FIGS. The photocurable composition 15 oozes out between the gap 78 and the shaft 85 of the opening / closing member 72, and the photocurable composition 15 accumulates at the ⁇ -ring 77 a.
- the discharge device 45 and the photo-curable composition 15 whose composition and the like have been adjusted can achieve multiple-time repetitive discharge properties over a long period of time.
- the amount of the photopolymerization initiator to be added is reduced, or hydroxy TEMPO (4-hydroxy-2,2,2) is used as a light stabilizer. (6,6-tetramethylpiperidine 1-oxyl, etc.) is added in an adjusted amount.
- N-vinyl lactams which are acrylamide compounds, as the ultraviolet-curable compound in order to more appropriately impart long-term ejection durability and photocurability of droplets after ejection.
- N-vinyl lactams suppress the polymerization reaction due to energy such as friction and have higher photopolymerization reactivity than other acrylamide compounds.
- the component amount of the photocurable compound in the photocurable composition 15 (acrylamide-based Compound, the total amount of the monofunctional acrylic compound and / or the polyfunctional acrylate) within the range of 10% by mass or more and 60% by mass or less, more preferably 20% by mass or more and 50% by mass or less. It is also preferable to be within the range. It is preferable that the content is within this range, because the polymerization reaction in the case due to energy such as friction can be suppressed, and the droplets applied to the film are quickly photocured.
- the film manufacturing facility 30 (see FIG. 3) is not limited to the case where the film 10 is manufactured, and various films can be manufactured by using the pulse generator 66 and the system controller 68 described above.
- the film 110 shown in FIG. 8 can also be manufactured by the film manufacturing equipment 30.
- the film 110 includes the protruding portions 12 only in certain sections on both sides of the long film material 11.
- the section in the width direction in which the protrusion 12 is formed is not limited to both sides, and may be, for example, a fixed section at the center in the width direction, for example, in addition to or instead of both sides.
- the system controller 68 drives, via the driver 67, only the ejection devices 45 arranged in certain sections at both ends in the width direction.
- the light source 47 only a part of both ends in the width direction where the droplet 41 is formed may be driven by the system controller 68 to emit light.
- the system controller 68 drives only a part of all of the ejection devices 45 and the light sources 47 in the width direction, so that various films in which the convex portions 12 are formed in the predetermined region in the width direction are provided. Can be manufactured.
- the discharge device 45 and the light source 47 may be arranged only in the section where the protrusion 12 is formed in the width direction.
- the film 120 shown in FIG. 9 can be manufactured by the film manufacturing equipment 30 (see FIG. 3).
- the film 120 includes the protrusions 12 in a part of the long film material 11 in the longitudinal direction. Specifically, the protrusions 12 are provided for each predetermined section in the longitudinal direction.
- the system controller 68 detects the position of the film material 11 passing through the discharge port 45a from the front end in the longitudinal direction, and detects the film material passing through the discharge port 45a by the method described above.
- the discharge device 45 is driven via the driver 67 to discharge the droplet 41 (see FIG. 3).
- the light source 47 is driven by the system controller 68 when the film 41 on which the droplets 41 are formed has reached a target position, emits light, and the projection 12 is formed.
- the film 10 was manufactured using the film manufacturing equipment 30.
- the film material 11 is a TAC film formed of TAC.
- the photocurable composition 15 was a mixed liquid obtained by mixing a high-viscosity agent as a viscosity modifier, a photopolymerization initiator, and the like, and was supplied from the supply unit 81 to the discharge device 45. Eight types of photocurable compositions 15 were prepared, and these are hereinafter referred to as mixed liquids A to H.
- Formulations of the mixed liquids A to H as the photocurable composition 15 are shown in the “mixed liquid” column of Table 1.
- Table 1 shows acrylamide compounds and their viscosities, polyfunctional acrylate compounds and their viscosities, monofunctional acryl compounds and their viscosities, and the amounts of these compounds and photopolymerization initiators.
- the photopolymerization initiator is a mixture of Irgacure (registered trademark) 907 (manufactured by BASF Japan Co., Ltd.) and 2,4-diethylthioxanthone (KAYACURE @ DETX-S, manufactured by Nippon Kayaku Co., Ltd.) at a mass ratio of 1: 3. It is.
- a or B of the acrylamide-based compound, C or D of the polyfunctional acrylate compound, and E of the monofunctional acrylic compound are as follows, respectively.
- D Mixture of pentaerythritol triacrylate and pentaerythritol tetraacrylate (PETA / PETTA), KAYARAD PET-30 (manufactured by Nippon Kayaku Co., Ltd.)
- Table 2 shows the conditions for manufacturing the film 10.
- the ejection of the droplets 41 was repeated at a constant cycle.
- “Frequency” in Table 2 is the reciprocal of the cycle of repeatedly discharging the droplet 41.
- the “discharge liquid amount” in Table 2 is the amount of the mixed liquid discharged from the discharge device 45, and is also the volume of each droplet 41.
- a commercially available ultraviolet irradiator HLUV-126UV365 manufactured by CCS Corporation having a light source 47 equipped with a light emitting diode (LED, light emitting diode) was used.
- the length L from the discharge port 45a to the light source 47 was 0.4 m.
- Diameter RP, Height HP, and Shape of Protrusion The diameter RP and the height HP were measured by shape analysis using LEXT OLS4000, which is a 3D laser microscope manufactured by Olympus Corporation.
- the shape is such that the convex portion 12 is viewed from the vertical direction of the first surface A (hereinafter, referred to as a plan view shape), and when the plan view shape is circular, the cross section is viewed in the thickness direction. (Hereinafter, referred to as cross-sectional shape) was evaluated according to the following criteria.
- D a plurality of convex portions smaller than the target convex portions and having different sizes from each other are generated by the separation of the droplets 41. A, B and C are acceptable and D is unacceptable.
- A The shape in plan view is a circle diameter, and the cross-sectional shape is a semicircle or an arc.
- B The shape in plan view was circular, and the cross-sectional shape had a flat top as shown in FIG. 6 or a dent as shown in FIG.
- C The shape in plan view was not circular, but was distorted as shown in FIG. FIG. 10 shows only the convex portions, and the convex portions are denoted by reference numeral 150.
- D The shape in plan view could not be said to be circular, or a plurality of protrusions smaller than the target protrusion and different in size from each other were recognized.
- the discharge durability was evaluated as follows. All of the following AC are acceptable. A: The number of ejections is 5,000,000 times or more. B: Number of ejections of 500,000 or more to less than 5,000,000. C: The number of ejections is 10,000 or more and less than 500,000. D: less than 10,000 discharges.
- Comparative Example 1 A film having a plurality of convex portions was manufactured by a commercially available ink jet type ejection apparatus, and Comparative Examples 1 and 2 were produced. Note that the ink jet type discharge device does not include an opening / closing member that opens and closes the discharge port 45a unlike the opening / closing member 72 of this example.
- the mixed liquid E shown in Table 1 was used as the photocurable composition discharged from the above discharge device.
- a mixed liquid F having the formulation shown in Table 1 was used, and the total amount of the mixed liquid F was 100 parts by weight.
- This mixture F was mixed with 30 parts by weight of propylene glycol monomethyl ether and 100 parts by weight of methyl ethyl ketone.
- the mixed liquid was discharged by the above discharge device.
- the viscosity of the mixed liquid F was 20 mPa ⁇ s or less.
- a dryer was provided between the discharge device 45 of the film production equipment 30 and the curing unit 34 to produce a film, which was used as Comparative Example 2.
- the formed droplets were dried by a dryer at 100 ° C. for 20 seconds, and then irradiated with light to form a convex portion.
- the film material used was a TAC film formed of TAC, and was the same as the film material 11 used in the examples.
- Example 16 to [Example 18] Film 10 was produced in the same manner as in Example 11.
- the film material 11 is a TAC film formed of TAC.
- Three types of photocurable compositions 15 were prepared, and these are hereinafter referred to as mixed liquids I to K.
- Formulations of the mixed liquids I to K as the photocurable composition 15 are shown in the “mixed liquid” column of Table 3.
- Table 3 shows acrylamide compounds and their viscosities, polyfunctional acrylate compounds and their viscosities, monofunctional acryl compounds and their viscosities, types and amounts of photopolymerization initiators, and amounts of light stabilizers.
- the photopolymerization initiator is the same as that used in the above-mentioned mixed liquids A to D as the photopolymerization initiator a.
- Irgacure registered trademark
- -4-diethylthioxanthone (KAYACURE @ DETX-S, manufactured by Nippon Kayaku Co., Ltd.) at a mass ratio of 1: 3 was used.
- F of the acrylamide-based compound, G or H of the polyfunctional acrylate compound, and I of the monofunctional acrylic compound are as follows, respectively.
- two kinds of polyfunctional acrylate components were used, they were separately described in Table 3 in the column of “first polyfunctional component” and “second polyfunctional component” of “polyfunctional component”.
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Abstract
Description
フィルム製造設備30を用いて、フィルム10を製造した。フィルム材11は、TACで形成されたTACフィルムである。光硬化性組成物15は、粘度調整剤としての高粘度化剤、及び光重合開始剤などを混合した混合液としており、供給部81から吐出装置45へ供給した。光硬化性組成物15として8種類を調製し、これらを以下、混合液A~Hと称する。
A;ジメチルアクリルアミド、DMAA(KJケミカルズ社製)
B;ヒドロキシエチルアクリルアミド、HEAA(KJケミカルズ社製)
C;ポリプロピレングリコールジアクリレート、アロニックスM220(東亜合成社(株)製)
D;ペンタエリスリトールトリアクリレートとペンタエリスリトールテトラアクリレートの混合物(PETA/PETTA)、KAYARAD PET-30(日本化薬(株)製)
E;アクリロイルモルフォリン、ACMO(KJケミカルズ社製)
オリンパス社製の3Dレーザ顕微鏡であるLEXT OLS4000を用いた形状解析で、径RP及び高さHPを測定した。形状は、凸部12を、第1表面Aの垂直方向から見た形状(以下、平面視形状と称する)、および、平面視形状が円形である場合には厚み方向での断面を見た形状(以下、断面形状と称する)について、以下の基準で評価した。下記Dにおける、目的とする凸部よりも小さく、かつ、互いに異なる大きさの複数の凸部は、液滴41が分離することにより生成したものである。AとBとCとは合格、Dとは不合格である。
A;平面視形状は円径であり、断面形状は半円形または弓形である。
B;平面視形状は円形であり、断面形状は、図6に示すような頂部が平ら、もしくは図7に示すような凹みがあった。
C;平面視形状は円形ではなく、図10に示すようにゆがんだ形状となっていた。なお、図10には凸部のみを描いており、凸部には符号150を付している。
D;平面視形状は円形とは言えない、または、目的とする凸部よりも小さくかつ互いに異なる大きさの複数の凸部が認められた。
フィルム10を製造した後に、硬化ユニット34と巻取部35との間のローラ37Bの周面を、通常の室内照明の下で目視観察(以下、通常観察と称する)し、通常観察により汚れが観察されない場合には、強い照明光の下で目視観察(以下、強制観察と称する)した。この評価は、得られたフィルム10自体の性能に関するものではないので、下記のA~Cはいずれも合格としている。
A;強制観察においてローラに汚れは確認されなかった。
B;強制観察で、ごくわずかに汚れが観察された。
C;通常観察で汚れが観察された。
フィルム製造装置30の吐出装置45を用いて、光硬化性組成物15の繰り返し吐出試験を行い連続吐出回数を計測した。連続吐出回数とは、吐出を開始してから繰り返し吐出が停止する直前までの吐出回数である。吐出耐久性評価においては、繰り返し吐出条件は周波数を1000HZにした以外は各実施例と同様である。吐出耐久性として以下のように評価した。下記のA~Cはいずれも合格である。
A;吐出回数500万回以上。
B;吐出回数50万以上から500万回未満。
C;吐出回数1万回以上50万回未満。
D;吐出回数1万回未満。
インクジェット方式の市販の吐出装置により凸部を複数備えるフィルムを製造し、比較例1,2とした。なお、インクジェット方式の吐出装置は、本例の開閉部材72のように吐出口45aを開閉する開閉部材は備えていない。比較例1では、上記の吐出装置から吐出する光硬化組成物として表1に示す混合液Eを用いた。比較例2では、表1に示す処方の混合液Fを用い、この混合液Fの全量を100重量部とし、この混合物Fとプロピレングリコールモノメチルエーテル30重量部と、メチルエチルケトン100重量部とを混合した混合液を上記の吐出装置により吐出した。混合液Fの粘度は20mPa・s以下であった。また、フィルム製造設備30の吐出装置45と硬化ユニット34との間に乾燥機を設け、フィルムを製造し、比較例2とした。比較例2では、形成した液滴を乾燥機により100℃で20秒乾燥し、その後、光を照射することにより凸部を形成した。いずれの比較例も、用いたフィルム材は、TACで形成されたTACフィルムであり、実施例で用いたフィルム材11と同じである。
実施例11と同様にフィルム10を製造した。フィルム材11は、TACで形成されたTACフィルムである。光硬化性組成物15として3種類を調製し、これらを以下、混合液I~Kと称する。
F;N-ビニルカプロラクタム(東京化成工業(株)社製)
G;エトキシ化(3)トリメチロールプロパントリアクリレート(SR454 D NS、サートマー・ジャパン(株)製)
H;CN964A85(ウレタンアクリレートオリゴマー、平均官能基数2、サートマー・ジャパン(株)製)
I;サイクリックトリメチロールプロパンフォーマルアクリレート(SR531、サートマー・ジャパン(株)製)
11 フィルム材
11A 第1表面
11B 第2表面
12,91,96,150 凸部
15 光硬化性化合物
30 フィルム製造設備
31 フィルムロール
32 送出部
32a 回転軸
33 吐出部
34 硬化ユニット
35 巻取部
37A,37B ローラ
38 フィルム材ロール
41 液滴
42 支持ローラ
44 吐出ユニット
45 吐出装置
45a 吐出口
46 支持部材
47 光源
48 支持部材
56 ターレットアーム
57 巻取り軸
58 巻き芯
59 ガイドアーム
61 ガイドローラ
62 アーム取付軸
66 パルスジェネレータ
67 ドライバ
68 システムコントローラ
71 ケース
72 開閉部材
73 ケース本体
73a 供給口
74 底部材
75 押さえ部材
77a,77b Oリング
78 封止部材
81 供給部
82 貫通孔
83 当接部
84 圧電素子
85 軸
91a,96a 頂部
Dc 移動方向
HP 高さ
L 長さ
PL12,PW12,PL45,PW45 ピッチ
RP,R41 径
PS1 巻取り位置
PS2 巻き芯交換位置
Claims (14)
- 長手方向に移動している長尺のフィルム材に複数の凸部を形成するフィルム製造方法において、
光硬化性化合物を含有する液が内部に充填されるケースと、前記ケースに形成されており、前記内部に一端が露呈され、他端が前記液の吐出口とされた貫通孔と、前記一端を開閉する開閉部材とを備える吐出装置の前記ケースに、前記液を加圧した状態に充填し、前記一端を開放する開放位置と前記一端を閉塞する閉塞位置との間で移動する前記開閉部材を、前記閉塞位置から前記開放位置へ繰り返し移動させることにより、前記内部に充填されている前記液を前記吐出口から液滴として吐出させ、移動中の前記フィルム材に向けて飛翔させる吐出工程と、
前記フィルム材の移動方向における前記吐出装置よりも下流に設けられ、前記光硬化性化合物を硬化する光を射出する光源を用いて、前記フィルム材に付着した前記液滴の前記光硬化性化合物を硬化することにより前記液滴を前記凸部にする硬化工程と、
を有するフィルム製造方法。 - 前記開閉部材は、圧電素子と、前記圧電素子に固定され、前記吐出口に当接する当接部と、前記圧電素子に電圧を印加する電圧印加部とを有し、前記電圧印加部によって前記圧電素子へ印加する電圧を増減させることにより、前記当接部を前記開放位置と前記閉塞位置との間で移動させる請求項1に記載のフィルム製造方法。
- 前記吐出工程は、前記液滴を0.8×10-12m3以上100.0×10-12m3以下の範囲内の体積に吐出する請求項1または2に記載のフィルム製造方法。
- 前記液の粘度は、20mPa・s以上1000mPa・s以下の範囲内である請求項1ないし3のいずれか1項に記載のフィルム製造方法。
- 前記吐出装置から前記光源に達するまでの前記フィルム材の移動時間を調整することにより、前記凸部の形状を調整する請求項1ないし4のいずれか1項に記載のフィルム製造方法。
- 前記光は紫外線であり、前記光硬化性化合物は紫外線硬化性化合物である請求項1ないし5のいずれか1項に記載のフィルム製造方法。
- 前記紫外線硬化性化合物は、アクリルアミド系化合物である請求項6に記載のフィルム製造方法。
- 前記光硬化性化合物は、光安定化剤を含む請求項1ないし7のいずれか1項に記載のフィルム製造方法。
- 前記光硬化性化合物は、単官能アクリル化合物を含む請求項1ないし8のいずれか1項に記載のフィルム製造方法。
- 前記光硬化性化合物は、多官能アクリレート化合物を含む請求項1ないし9のいずれか1項に記載のフィルム製造方法。
- 前記フィルム材は、セルロースアシレートで形成されている請求項1ないし10のいずれか1項に記載のフィルム製造方法。
- 長手方向に移動している長尺のフィルム材に複数の凸部を形成するフィルム製造設備において、
長尺のフィルム材を長手方向に移動させる移動機構と、
光硬化性化合物を含有する液の吐出口が前記フィルム材の移動路に向いた状態で配され、前記液を吐出する吐出装置と、
前記フィルム材の移動方向における前記吐出装置よりも下流に設けられ、前記光硬化性化合物を硬化する光を射出する光源と、
を備え、
前記吐出装置は、
前記液が内部に加圧した状態で充填されるケースと、
前記ケースに形成されており、前記内部に一端が露呈され、他端が前記吐出口とされた貫通孔と、
前記一端を開放し、前記液を前記吐出口から液滴として吐出させ、移動中の前記フィルム材に向けて飛翔させることにより前記フィルム材に付着させる開放位置と、前記一端を閉塞し、前記液滴の吐出を停止させる閉塞位置との間で繰り返し移動する開閉部材と、
を有するフィルム製造設備。 - セルロースアシレートで形成されているフィルム材と、
前記フィルム材の一方の表面に、球冠状の凸部と、頂部が平坦な凸部と、頂部に凹みが形成されている凸部とのいずれかを複数備えるフィルム。 - 複数の前記凸部は、規則的に配列している請求項13に記載のフィルム。
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