JP2007112129A - Method and apparatus for manufacturing uneven sheet - Google Patents

Abstract

An uneven sheet having a regular fine uneven pattern formed on its surface is manufactured with high quality without defects and high productivity with high line speed.
A method of manufacturing a concavo-convex sheet in which the concavo-convex surface of the embossing roller 13 is transferred and formed on the surface of a sheet W. A step of continuously running the belt-like flexible sheet W, a step of applying a radiation-curing resin to the surface of the sheet to form a coating layer, and winding the sheet around a rotating embossing roller so that the surface of the coating layer is uneven. , A step of irradiating the sheet with the sheet wound around the roller to cure the coating layer, a step of peeling the sheet from the uneven roller, and one side of the continuously running sheet after peeling Or the process of laminating | stacking a protective film on both surfaces and the process of winding up the sheet | seat which is continuously running after lamination in roll shape are included.
[Selection] Figure 1

Description

  The present invention relates to a method and apparatus for producing a concavo-convex sheet, in particular, a sheet-like material such as an embossed sheet having an antireflection effect in which a regular fine concavo-convex pattern is formed on the surface, with high quality without defects, In addition, the present invention relates to a method and apparatus for manufacturing a concavo-convex sheet suitable for manufacturing with high line speed and high productivity.

  In recent years, an embossed sheet having an antireflection effect has been adopted for use in electronic displays such as liquid crystals. In addition, flat lenses such as lenticular lenses and fly-eye lenses, embossed sheets such as light diffusion sheets, brightness enhancement sheets, optical waveguide sheets, and prism sheets are used. As such an embossed sheet, a sheet having a regular fine concavo-convex pattern formed on the surface has been conventionally known. Various methods are conventionally known as a method for forming such a regular fine uneven pattern (see Patent Documents 1 to 6).

  For example, in the apparatus configured as shown in FIG. 8, the application means 2 applies resin to the surface of the stamper roller 1 on which a regular uneven pattern is formed, and the continuously running sheet 3 is applied to the stamper roller. 1 and the nip roller 4, the resin of the stamper roller 1 is in contact with the sheet 3, the resin is irradiated with ionizing radiation and cured, and then the sheet 3 is wound around the release roller 5 and peeled from the stamper roller 1 The contents to be disclosed are disclosed.

Further, in the apparatus configured as shown in FIG. 9, a resin is applied in advance to the surface of the continuously running sheet 3, and this sheet 3 is connected to the stamper roller 1 on which a regular uneven pattern is formed. Content that is sandwiched between the nip rollers 4 and the uneven pattern of the stamper roller 1 is transferred to the resin, is irradiated with ionizing radiation and cured, and then the sheet 3 is wound around the release roller 5 and peeled off from the stamper roller 1 Is disclosed.
JP-A-11-262958 JP-A-11-300768 JP 2001-314815 A JP 2002-67057 A JP 2002-365405 A JP 2001-314815 A

  However, the above-described Patent Documents 1 to 6 relating to the production line of such an embossed sheet are the description content limited to the basic configuration and are not related to the entire production line. Therefore, it is very difficult to produce a concavo-convex sheet having a regular fine concavo-convex pattern formed on the surface only with the description in Patent Documents 1 to 6 without defects and with high quality and high line speed. Have difficulty.

  The present invention has been made in view of such circumstances, and is used to manufacture a concavo-convex sheet having a regular fine concavo-convex pattern formed on the surface with high quality and high productivity without defects. It is an object of the present invention to provide a method and apparatus for producing a concavo-convex sheet suitable for the above.

  In order to achieve the above object, the present invention provides a method for producing a concavo-convex sheet in which the concavo-convex surface of the concavo-convex roller is transferred and formed on the surface of the sheet-like body, and a step of continuously running the belt-like flexible sheet-like body; A step of applying a radiation curable resin to the surface of the sheet-like body that is continuously running to form a coating layer; and the sheet-like body that is continuously running is wound around a rotating concavo-convex roller, and the coating layer A step of transferring the unevenness on the surface of the uneven roller, a step of curing the coating layer by irradiating radiation in a state where the sheet-like body continuously running is wound around the uneven roller, and a continuous running A step of peeling the sheet-like body from the concave-convex roller, a step of laminating a protective film on one or both sides of the sheet-like body continuously running after peeling, and a continuous after lamination To provide a method of manufacturing indented sheet which comprises the steps of winding the sheet-like body that row into a roll, the.

  To this end, the present invention provides a sheet-like body supply means for feeding out a belt-like flexible sheet-like body, an application means for applying a radiation curable resin to the surface of the sheet-like body, A drying means for drying the solvent contained in the coating layer, and a transfer means for transferring the irregularities on the surface of the uneven roller onto the surface of the sheet-like body while winding the continuously running sheet-like body around a rotating uneven roller. A curing means for curing the coating layer in a state where the sheet-like body is wound around the uneven roller, a peeling means for peeling the sheet-like body from the uneven roller, and the sheet-like body after peeling A laminate means for laminating a protective film on one or both sides of the sheet, and a sheet-like body winding means for winding the laminated sheet-like body into a roll. To provide a manufacturing apparatus of the convex sheet.

  According to the present invention, the radiation curable resin is applied to the surface of the continuously running sheet-like body through a series of steps from the upstream side, the sheet-like body is wound around the uneven roller, and the surface unevenness is transferred. In this state, the coating layer is cured by irradiating with radiation, the sheet-like body is peeled off from the uneven roller, a protective film is laminated on one side or both sides, and rolled up. Therefore, since winding can be performed in a series of steps, it can be manufactured with high quality without defects and with high line speed and high productivity.

  In this specification, the term “concave / convex roller” refers to a concave / convex pattern (embossed pattern on the surface of a belt-shaped body such as an endless belt as well as a concave / convex pattern on the surface of a cylindrical roller. In this case, even such a belt-like body acts in the same manner as a cylindrical embossing roller, and the same effect can be obtained.

  In this invention, it is preferable to include the process of drying the solvent in the said application layer. As described above, since the step of drying the solvent contained in the coating layer is provided before the sheet-like body is wound around the uneven roller and cured, the function of the product is that the added solvent remains after curing. There is no worry about deterioration or strength deterioration of the cured film. Similarly, there is no concern that the solvent will be released during use of the product, resulting in malodors or adverse health effects.

  Moreover, in this invention, it is preferable to include the process of detecting the edge part position of the width direction of the said sheet-like body which is running continuously, and controlling the width direction position of the said sheet-like body. The concavo-convex sheet of the present invention forms a fine pattern on the sheet surface, so if there is a deviation or fluctuation during sheet conveyance, it leads to the occurrence of defects very sensitively. If the position can be controlled, the above-described defect can be effectively prevented.

  In the present invention, it is preferable that the sheet-like body is continuously run by a driving drum that sucks and holds the sheet-like body on the outer peripheral surface and rotates at a predetermined peripheral speed. If the sheet-like body is continuously run by such a drive drum, the running speed of the sheet-like body is stabilized and the transfer shape is improved. As such a driving drum, a drum that holds a sheet-like body by suction from a large number of holes formed on the outer peripheral surface, or a so-called grooved drum that holds a sheet-like body by a plurality of grooves formed on the outer peripheral surface. A suction drum can be used.

  Moreover, in this invention, it is preferable to control the tension | tensile_strength of the said sheet-like body which is running continuously by a tension control means. If the tension of the sheet-like body is controlled by such tension control means, the traveling speed of the sheet-like body becomes stable and the transfer shape becomes good.

  Moreover, in this invention, it is preferable to include the process of cut | judging the said sheet-like body wound up by roll shape to product size. Such a cutting step is preferably performed off-line after a series of steps.

  Moreover, in this invention, it is preferable to include the process of test | inspecting the defect of the uneven | corrugated pattern transcribe | transfer formed by the said sheet-like object. If such an inspection process is included in a series of processes, it becomes easy to eliminate a defective portion.

  In the present invention, it is preferable that the pitch of the concavo-convex pattern transferred and formed on the sheet-like body is 100 μm or less. In the present invention, the uneven sheet is preferably used as an optical film.

  In the present invention, in the step of irradiating the coating layer with the radiation while the continuously running sheet-like body is wound around the concavo-convex roller, the concavo-convex surface of the concavo-convex roller is transferred to the coating layer. It is preferable to shield the coating layer before the process from being irradiated with the radiation. Alternatively, the curing means is a radiation irradiation device, and the radiation irradiated from the radiation irradiation device is not irradiated to the coating layer before the unevenness of the uneven roller surface is transferred and formed on the surface of the sheet-like body, It is preferable to provide a light shielding member. By preventing radiation from being applied to the coating layer before the unevenness on the surface of the uneven roller is transferred and formed on the surface of the sheet-like body, the uneven pattern can be accurately transferred.

  Here, it is preferable that the transfer unit is at least one nip roller that faces the concave-convex roller and clamps the sheet-like body, and the light shielding member is disposed between the radiation irradiation device and the nip roller. It is more preferable to install it close to the uneven roller. And it is preferable that the said light-shielding member is a movable type, and it is still more preferable that the said light-shielding member interlock | cooperates with the said nip roller.

  Moreover, it is preferable that the distance of the said light shielding member and the said uneven roller is the range of 1-10 mm.

  Alternatively, the radiation irradiation device includes a radiation lamp and a box that covers the radiation lamp, and the radiation irradiation port of the box is curved along the concave-convex roller, and the radiation irradiation device is brought close to the concave-convex roller. It is preferable to install.

  As described above, according to the present invention, a concavo-convex sheet having a regular fine concavo-convex pattern formed on the surface can be produced with high quality and high productivity without defects and with high line speed.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a configuration diagram showing a configuration of an embossed sheet manufacturing apparatus 10 to which the present invention is applied.

  The embossed sheet manufacturing apparatus 10 includes a sheet-like body supply unit 11, a coating unit 12, a drying unit 19, an embossing roller 13 that is an uneven roller, a nip roller 14, a resin curing unit 15, and a peeling roller 16. The defect inspection means 21, the protective film supply means 17, the sheet winding means 18 and the like. And the sheet | seat W which is a sheet-like body comes to be supported by the guide rollers G and G ... from an upstream side (sheet-like body supply means 11) to a downstream side (sheet winding means 18), and is conveyed. Yes.

  The sheet supply means 11 which is a sheet-like body supply means is for sending out the sheet W which is a sheet-like body, and includes a delivery roll on which the sheet W is wound.

  A first suction drum 24 is provided between the sheet supply unit 11 and the coating unit 12. The first suction drum 24 is a means for continuously running the sheet W by sucking and holding the sheet W and rotationally driving at a predetermined peripheral speed, similarly to a second suction drum 26 described later. The suction holding of the sheet W may be configured by suction from a large number of holes formed on the outer peripheral surface of the drum, or may be configured to be held by a plurality of grooves formed on the outer peripheral surface of the drum (grooved suction drum).

  A dust remover 28 is provided downstream of the first suction drum 24. The dust remover 28 can remove dust adhering to the surface of the sheet W. As the type of the dust remover 28, various known types such as a type that blows dry air that has been subjected to electrostatic dust removal and a type that winds the sheet W around an adhesive roller as shown in the figure can be adopted.

  The application means 12 is an apparatus that applies a radiation curable resin liquid to the surface of the sheet W, a liquid supply source that supplies the radiation curable resin liquid, a liquid supply apparatus (liquid feed pump) (not shown), an application The head 12C includes a support roller 12D that wraps and supports the sheet W during coating, and a pipe (not shown) for supplying a radiation curable resin liquid from a liquid supply source to the coating head 12C. As the coating head 12C, a coating head of a die coater (extrusion type coater) is employed.

  As the drying means 19, various known systems can be adopted as long as the coating liquid applied to the sheet W can be uniformly dried, such as a tunnel-shaped drying apparatus shown in FIG. 1. . For example, a radiant heating method using a heater, a hot air circulation method, a far infrared method, a vacuum method, or the like can be employed.

  The drying means 19 shown in FIG. 1 is divided into four blocks of a tunnel-like device, and is arranged in the order of the first block 19A, the second block 19B, the third block 19C, and the fourth block 19D from the upstream side. The temperature can be set individually.

  The embossing roller 13 is required to have an uneven pattern accuracy, mechanical strength, roundness, and the like that can transfer and form unevenness on the surface of the sheet W. Such an embossing roller 13 is preferably a metal roller.

  A regular fine uneven pattern is formed on the outer peripheral surface of the embossing roller 13. Such a regular fine concavo-convex pattern is required to have a shape obtained by inverting the fine concavo-convex pattern on the surface of an embossed sheet as a product. A schematic sectional view of the embossing roller 13 is shown in FIG.

  As an embossed sheet as a product, for example, a lenticular lens in which fine concavo-convex patterns are arranged two-dimensionally, or a fine cone such as a fly-eye lens, cone, or pyramid in which fine concavo-convex patterns are arranged three-dimensionally in the XY direction A flat lens or the like laid on the surface is an object, and a regular fine uneven pattern on the outer peripheral surface of the embossing roller 13 is made to correspond to this.

  As a method for forming a regular fine concavo-convex pattern on the outer peripheral surface of the embossing roller 13, a method of cutting the surface of the embossing roller 13 with a diamond bit (single point), photo-etching, electron beam drawing on the surface of the embossing roller 13, The method of forming irregularities directly by laser processing etc. can be adopted, and irregularities are formed on the surface of thin metal plate by photo etching, electron beam drawing, laser processing, stereolithography, etc. Can be wound around and fixed to the embossing roller 13.

  In addition, uneven surfaces are formed on the surface of materials that are easier to process than metal by photo-etching, electron beam drawing, laser processing, stereolithography, etc., and a reversal of this shape is formed by electroforming etc. to make a thin metal plate It is also possible to adopt a method in which an embossing roller 13 is formed by creating a body and winding and fixing the plate-like body around the roller. In particular, when the inversion mold is formed by electroforming or the like, there is a feature that a plurality of plate-like bodies having the same shape can be obtained from one master (mother).

  It is preferable to perform a mold release process on the surface of the embossing roller 13. Thus, the shape of the fine concavo-convex pattern can be satisfactorily maintained by performing the mold release process on the surface of the embossing roller 13. As the mold release treatment, various known methods such as coating treatment with a fluororesin can be employed. The embossing roller 13 is preferably provided with driving means. The embossing roller 13 rotates in the clockwise direction (CW) as shown by the arrow in the figure.

  The nip roller 14 forms a roller while pressing the sheet W while being paired with the embossing roller 13, and is required to have predetermined mechanical strength, roundness, and the like. The longitudinal elastic modulus (Young's modulus) on the surface of the nip roller 14 is set to an appropriate value because roller molding is insufficient when it is too small, and when it is too large, it reacts sensitively to the inclusion of foreign substances such as dust and tends to cause defects. It is preferable. The nip roller 14 is preferably provided with driving means. The nip roller 14 rotates counterclockwise (CCW) as shown by the arrow in the figure.

  In order to apply a predetermined pressing force between the embossing roller 13 and the nip roller 14, it is preferable to provide a pressing means on either the embossing roller 13 or the nip roller 14. Similarly, it is preferable to provide fine adjustment means on either the embossing roller 13 or the nip roller 14 so that the gap (clearance) between the embossing roller 13 and the nip roller 14 can be accurately controlled.

  The resin curing means 15 is a radiation irradiating device provided opposite to the embossing roller 13 on the downstream side of the nip roller 14. The resin curing means 15 transmits the sheet W by irradiation of the radiation and cures the resin liquid layer. The resin curing means 15 can irradiate radiation (light) having a wavelength corresponding to the curing characteristics of the resin, and according to the conveyance speed of the sheet W. It is preferable that a sufficient amount of radiation can be irradiated. As the resin curing means 15, for example, a cylindrical radiation lamp having substantially the same length as the width of the sheet W can be adopted. Further, a plurality of columnar radiation lamps can be provided in parallel, and a reflector can be provided on the back surface of the radiation lamp. In FIG. 1, two sets of radiation irradiation apparatuses are arranged in which cylindrical radiation lamps are arranged inside a casing (box).

  3 to 8 are views showing an apparatus for producing an uneven sheet according to the present invention, particularly the vicinity of the resin curing means 15. This is a case where the resin curing means 15 is a radiation irradiation apparatus, and the radiation irradiation apparatus includes a radiation lamp 15a and a casing (box) 15b covering the radiation lamp.

  In the embodiment of FIG. 3, the radiation irradiated from the radiation lamp of the radiation irradiation apparatus is not irradiated to the coating layer before the surface of the embossing roller (uneven roller) 13 is transferred and formed on the surface of the sheet W. The light shielding members 40 and 40 are provided. The nip roller 14 is supported by a rod 14b provided on the air cylinder 14a so that it can be pressed against or retreated from the embossing roller 13.

  In the embodiment of FIG. 4, the light shielding member 40 is provided between the radiation irradiation device 15 and the nip roller 14 and close to the embossing roller 13. The light shielding member 40 is supported by a rod 40b provided in the air cylinder 40a, and the distance from the embossing roller 13 can be adjusted.

  In the embodiment of FIG. 5, the light shielding member 40 is supported on the nip roller 14 by the connecting rod 42, and the light shielding member 40 is movable together with the nip roller 14. By pressing the nip roller 14 against the embossing roller 13, the distance between the light shielding member 40 and the embossing roller 13 can be reduced.

  In the embodiment shown in FIGS. 3 to 5, the distance between the light shielding member 40 and the embossing roller (uneven roller) 13 is preferably in the range of 1 to 10 mm.

  In the embodiment of FIG. 6, as in the embodiments of FIGS. 3 to 5, the radiation irradiation apparatus includes a radiation lamp 15 a and a casing (box) 15 b that covers the radiation lamp. 15 c is curved along the embossing roller 13, and the radiation irradiation device 15 is installed close to the embossing roller (uneven roller) 13. Also by doing so, it is possible to prevent radiation from being applied to the coating layer before the unevenness on the surface of the embossing roller (uneven roller) 13 is transferred and formed on the surface of the sheet W. Here, it is preferable that the distance between the radiation irradiation port 15c of the radiation irradiation device 15 and the embossing roller (uneven roller) 13 be in the range of 1 to 10 mm.

  As shown in FIGS. 3 to 6, the radiation irradiated from the radiation lamp 15 a is prevented from irradiating the coating layer before the unevenness on the surface of the embossing roller (uneven roller) 13 is transferred and formed on the surface of the sheet W. Thus, it is possible to improve the uneven pattern with high accuracy.

  The peeling roller 16 is paired with the embossing roller 13 to peel the sheet W from the embossing roller 13 and is required to have predetermined mechanical strength, roundness, and the like. The sheet W is peeled off from the embossing roller 13 and wound around the peeling roller 16 while being sandwiched between the rotating embossing roller 13 and the peeling roller 16 at the peeling portion. In order to ensure this operation, the peeling roller 16 is preferably provided with a driving means. The peeling roller 16 rotates counterclockwise (CCW) as shown by the arrow in the figure.

  In addition, when the temperature of resin etc. rises by hardening, the structure which provides a cooling means to the peeling roller 16 can also be employ | adopted in order to cool the sheet | seat W at the time of peeling, and to ensure peeling.

  Although not shown in the figure, a plurality of backup rollers are provided to face each other between the pressing location (3 o'clock position) of the embossing roller 13 and the peeling location (9 o'clock position). A configuration in which the curing process is performed while pressing the sheet W with the roller 13 can also be adopted.

  Defect inspection means 21 is disposed on the downstream side of the peeling roller 16. By such defect inspection means 21, it is possible to inspect defects in the concavo-convex pattern transferred and formed on the sheet W, and it becomes easy to eliminate defective portions. As the format of the defect inspection means 21, various known types of inspection devices (for example, CCD imaging devices) can be used.

  On the downstream side of the defect inspection means 21, a dancer roller 30 as a tension control means is arranged. The dancer roller 30 includes fixed rollers 30A and 30B and a moving roller 30C provided between the fixed rollers 30A and 30B. The tension of the sheet W is controlled by the lifting and lowering operation of the moving roller 30C.

  A second suction drum 26 is arranged on the downstream side of the dancer roller 30. As described above, the second suction drum 26 is a means for continuously running the sheet W by sucking and holding the sheet W and rotationally driving the sheet W at a predetermined peripheral speed in the same manner as the first suction drum 24. It is.

  On the downstream side of the second suction drum 26, an edge position control means (edge position controller) 32 is disposed. The edge position control means 32 is a device that detects the end position in the width direction of the continuously running sheet W and controls the position in the width direction of the sheet W.

  The edge position control means 32 includes fixed rollers 32A and 32B and inclined rollers 32C and 32D provided between the fixed rollers 32A and 32B. Then, the width direction of the sheet W is controlled by the tilting operation of the tilt rollers 32C and 32D so that the position in the width direction of the sheet W becomes a normal position based on the detection result of an edge position sensor (for example, a laser type position sensor) not shown. The position is controlled.

  The sheet winding means 18 stores the peeled sheet W, and includes a winding roll that winds the sheet W or the like. In this sheet winding means 18, the protective film H supplied from the adjacent protective film supply means 17 is supplied to the surface of the sheet W, and is stored in the sheet winding means 18 in a state where both films overlap. The

  Next, each material applied to the present invention will be described. As the sheet W, a resin film, paper (resin coated paper, synthetic paper, etc.), metal foil (aluminum web, etc.) and the like can be used. As the material of the resin fill, polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyester, polyolefin, acrylic, polystyrene, polycarbonate, polyamide, PET (polyethylene terephthalate), biaxially stretched polyethylene terephthalate, Known materials such as polyethylene naphthalate, polyamideimide, polyimide, aromatic polyamide, cellulose acylate, cellulose triacetate, cellulose acetate propionate, and cellulose diacetate can be used. Of these, polyester, cellulose acylate, acrylic, polycarbonate, and polyolefin can be preferably used.

  The sheet W generally has a width of 0.1 to 3 m, the sheet W has a length of 1000 to 100,000 m, and the sheet W has a thickness of 1 to 300 μm. However, application of other sizes is not impeded.

  These sheets W may be previously subjected to corona discharge, plasma treatment, easy adhesion treatment, heat treatment, dust removal treatment and the like. The surface roughness Ra of the sheet W is preferably 3 to 10 nm at a cutoff value of 0.25 mm.

  The sheet W may be a sheet W provided with a base layer such as an adhesive layer in advance and dried and cured, or a sheet having another functional layer formed in advance on the back surface. Similarly, as the sheet W, not only a one-layer structure but also a structure having two or more layers can be adopted. Moreover, it is preferable that the sheet | seat W is a transparent body and translucent body which can permeate | transmit light.

  Resins that can be used in the present invention include a reactive group-containing compound such as a (meth) acryloyl group, a vinyl group, or an epoxy group, and a radical or cation that can react with the reactive group-containing compound by irradiation with ultraviolet rays or the like. Those containing compounds that generate active species can be used.

  In particular, from the viewpoint of curing speed, a combination of a reactive group-containing compound (monomer) containing an unsaturated group such as a (meth) acryloyl group or a vinyl group and a radical photopolymerization initiator that generates a radical by light is preferable. . Of these, (meth) acryloyl group-containing compounds such as (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, and polyester (meth) acrylate are preferable.

  As the (meth) acryloyl group-containing compound, a compound containing one or more (meth) acryloyl groups can be used. Moreover, the reactive group containing compound (monomer) containing unsaturated groups, such as said acryloyl group and a vinyl group, may be used independently or may be used in mixture of multiple types as needed.

  Examples of such (meth) acryloyl group-containing compounds include, for example, isobornyl (meth) acrylate, bornyl (meth) acrylate, tricyclodecanyl as monofunctional monomers containing only one (meth) acryloyl group-containing compound. (Meth) acrylate, dicyclopentanyl (meth) acrylate, dicyclopentenyl (meth) acrylate, cyclohexyl (meth) acrylate, benzyl (meth) acrylate, 4-butylcyclohexyl (meth) acrylate, acryloylmorpholine, 2-hydroxyethyl (Meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, Propyl (meth) acrylate, butyl (meth) acrylate, amyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, isoamyl (meth) acrylate, hexyl (meth) acrylate , Heptyl (meth) acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylate, undecyl (meth) acrylate , Dodecyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, isostearyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate , Butoxyethyl (meth) acrylate, ethoxydiethylene glycol (meth) acrylate, polyethylene glycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate, methoxyethylene glycol (meth) acrylate, ethoxyethyl (meth) acrylate, methoxypolyethylene glycol ( Examples include meth) acrylate and methoxypolypropylene glycol (meth) acrylate.

  Furthermore, as a monofunctional monomer having an aromatic ring, phenoxyethyl (meth) acrylate, phenoxy-2-methylethyl (meth) acrylate, phenoxyethoxyethyl (meth) acrylate, 3-phenoxy-2-hydroxypropyl (meth) acrylate, 2-phenylphenoxyethyl (meth) acrylate, 4-phenylphenoxyethyl (meth) acrylate, 3- (2-phenylphenyl) -2-hydroxypropyl (meth) acrylate, and p-cumylphenol reacted with ethylene oxide ( (Meth) acrylate, 2-bromophenoxyethyl (meth) acrylate, 4-bromophenoxyethyl (meth) acrylate, 2,4-dibromophenoxyethyl (meth) acrylate, 2,6-dibromophenoxyethyl (meth) ) Acrylate, 2,4,6-bromophenyl (meth) acrylate, 2,4,6-tribromophenoxyethyl (meth) acrylate.

  Examples of such commercially available aromatic monocyclic monocyclic monomers include Aronix M113, M110, M101, M102, M5700, TO-1317 (above, manufactured by Toagosei Co., Ltd.), Biscote # 192, # 193, # 220, 3BM (Osaka Organic Chemical Co., Ltd.), NK Ester AMP-10G, AMP-20G (Shin Nakamura Chemical Co., Ltd.), Light Acrylate PO-A, P-200A, Epoxy Ester M-600A, light ester PO (above, manufactured by Kyoeisha Chemical Co., Ltd.), New Frontier PHE, CEA, PHE-2, BR-30, BR-31, BR-31M, BR-32 (above, Daiichi Kogyo) Pharmaceutical Co., Ltd.).

  Examples of unsaturated monomers having two (meth) acryloyl groups in the molecule include alkyl diols such as 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, and 1,9-nonanediol diacrylate. Examples include polyalkylene glycol diacrylates such as diacrylate, ethylene glycol di (meth) acrylate, tetraethylene glycol diacrylate, and tripropylene glycol diacrylate, neopentyl glycol di (meth) acrylate, and tricyclodecane methanol diacrylate.

  As unsaturated monomers having a bisphenol skeleton, ethylene oxide-added bisphenol A (meth) acrylic acid ester, ethylene oxide-added tetrabromobisphenol A (meth) acrylic acid ester, propylene oxide-added bisphenol A (meth) acrylic acid ester, propylene oxide-added Tetrabromobisphenol A (meth) acrylic acid ester, bisphenol A epoxy (meth) acrylate obtained by epoxy ring-opening reaction of bisphenol A diglycidyl ether and (meth) acrylic acid, tetrabromobisphenol A diglycidyl ether and (meth) Tetrabromobisphenol A epoxy (meth) acrylate, bisphenol F diglycidyl ether and (meth) obtained by epoxy ring-opening reaction with acrylic acid Bisphenol F epoxy (meth) acrylate obtained by epoxy ring-opening reaction with crylic acid, tetrabromobisphenol F epoxy (meth) acrylate obtained by epoxy ring-opening reaction of tetrabromobisphenol F diglycidyl ether and (meth) acrylic acid Etc.

  Commercially available unsaturated monomers having such a structure include Biscote # 700 and # 540 (above, manufactured by Osaka Organic Chemical Industry Co., Ltd.), Aronix M-208, M-210 (above, Toagosei Co., Ltd.) ), NK ester BPE-100, BPE-200, BPE-500, A-BPE-4 (above, Shin-Nakamura Chemical Co., Ltd.), light ester BP-4EA, BP-4PA, epoxy ester 3002M, 3002A 3000M, 3000A (above, manufactured by Kyoeisha Chemical Co., Ltd.), KAYARAD R-551, R-712 (above, manufactured by Nippon Kayaku Co., Ltd.), BPE-4, BPE-10, BR-42M (above, No. 1) Manufactured by Ichi Kogyo Seiyaku Co., Ltd.), Lipoxy VR-77, VR-60, VR-90, SP-1506, SP-1506, SP-1507, SP-1509, SP 1563 (manufactured by Showa High Polymer Co., Ltd.), NEOPOL V779, NEOPOL V779MA (manufactured by Japan U-PICA Co., Ltd.), and the like.

  Furthermore, as a trifunctional or higher functional (meth) acrylate unsaturated monomer, a trihydric or higher polyhydric alcohol (meth) acrylate such as trimethylolpropane litho (meth) acrylate, pentaerythritol tri (meth) acrylate or trimethylol. Propane trioxyethyl (meth) acrylate, tris (2-acryloyloxyethyl) isocyanurate, etc. are listed, and commercially available products include Aronix M305, M309, M310, M315, M320, M350, M360, M408 (and above, Toagosei) Made by Co., Ltd., Biscoat # 295, # 300, # 360, GPT, 3PA, # 400 (Osaka Organic Chemical Co., Ltd.), NK ester TMPT, A-TMPT, A-TMM-3, A- TMM-3L, A-TMMT (above, Shinnaka Chemical Co., Ltd.), Light Acrylate TMP-A, TMP-6EO-3A, PE-3A, PE-4A, DPE-6A (above, Kyoeisha Chemical Co., Ltd., KAYARAD PET-30, GPO-303, TMPTA) , TPA-320, DPHA, D-310, DPCA-20, DPCA-60 (manufactured by Nippon Kayaku Co., Ltd.) and the like.

  In addition, a urethane (meth) acrylate oligomer may be blended. Examples of urethane (meth) acrylates include polyether polyols such as polyethylene glycol and polytetramethyl glycol; succinic acid, adipic acid, azelaic acid, sebacic acid, phthalic acid, tetrahydro (anhydrous) phthalic acid, hexahydro (anhydrous) phthalic acid Obtained by reaction of a dibasic acid such as ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, etc. Polyester polyol, polyε-caprolactone-modified polyol; polymethylvalerolactone-modified polyol; ethylene glycol, propylene glycol, 1,4-butanediol, Alkyl polyols such as 1,6-hexanediol and neopentyl glycol; bisphenol A skeleton alkylene oxide modified polyols such as ethylene oxide-added bisphenol A and propylene oxide-added bisphenol A; bisphenol F skeleton alkylene such as ethylene oxide-added bisphenol F and propylene oxide-added bisphenol F Oxide-modified polyols or mixtures thereof and organic polyisocyanates such as tolylene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, etc. Manufactured from hydroxy group-containing (meth) acrylate And urethane (meth) acrylate oligomers. A urethane (meth) acrylate oligomer is preferable for maintaining the viscosity of the curable composition of the present invention moderately.

  As commercially available monomers of these urethane (meth) acrylates, for example, Aronix M120, M-150, M-156, M-215, M-220, M-225, M-240, M-245, M-270 ( As mentioned above, manufactured by Toagosei Co., Ltd.), AIB, TBA, LA, LTA, STA, Viscoat # 155, IBXA, Viscoat # 158, # 190, # 150, # 320, HEA, HPA, Viscoat # 2000, # 2100, DMA, biscort # 195, # 230, # 260, # 215, # 335HP, # 310HP, # 310HG, # 312 (above, manufactured by Osaka Organic Chemical Industry Co., Ltd.), Light Acrylate IAA, LA, SA , BO-A, EC-A, MTG-A, DMP-A, THF-A, IB-XA, HOA, HOP-A, HOA-M L, HOA-MPE, light acrylate 3EG-A, 4EG-A, 9EG-A, NP-A, 1,6HX-A, DCP-A (manufactured by Kyoeisha Chemical Co., Ltd.), KAYARADTC-110S, HDDA, NPGDA, TPGDA, PEG400DA, MANDA, HX-220, HX-620 (Nippon Kayaku Co., Ltd.), FA-511A, 512A, 513A (Hitachi Chemical Co., Ltd.), VP (BASF) ACMO, DMAA, DMAPAA (manufactured by Kojin Co., Ltd.) and the like.

  The urethane (meth) acrylate oligomer is obtained as a reaction product of (a) hydroxy group-containing (meth) acrylate, (b) organic polyisocyanate and (c) polyol, but (a) hydroxy group-containing (meth). A reaction product obtained by reacting an acrylate with (b) an organic polyisocyanate and then (c) a polyol is preferable.

  The above unsaturated monomers may be used alone, or a plurality of types may be mixed as necessary.

  Examples of photo radical polymerization initiators include acetophenone, acetophenone benzyl ketal, 1-hydroxycyclohexyl phenyl ketone, 2,2-dimethoxy-2-phenylacetophenone, xanthone, fluorenone, benzaldehyde, fluorene, anthraquinone, triphenylamine, carbazole 3-methylacetophenone, 4-chlorobenzophenone, 4,4′-dimethoxybenzophenone, 4,4′-diaminobenzophenone, Michler's ketone, benzoin propyl ether, benzoin ethyl ether, benzyldimethyl ketal, 1- (4-isopropylphenyl)- 2-hydroxy-2-methylpropan-1-one, 2-hydroxy-2-methyl-1-phenylpropan-1-one, thioxanthone, diethyl Oxanthone, 2-isopropylthioxanthone, 2-chlorothioxanthone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholino-propan-1-one, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, Examples thereof include bis- (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide, ethyl-2,4,6-trimethylbenzoylethoxyphenylphosphine oxide, and the like.

  Commercially available radical photopolymerization initiators include, for example, Irgacure 184, 369, 651, 500, 819, 907, 784, 2959, CGI 1700, CGI 1750, CGI 11850, CG 24-61, Darocurl 116, 1173 (above, Ciba Specialty Chemicals ( Co., Ltd.), Lucirin LR8728, 8893X (manufactured by BASF), Ubekrill P36 (manufactured by UCB), KIP150 (manufactured by Lamberti), and the like. Among these, Lucirin LR8883X is preferable from the viewpoint of being liquid and easily dissolved and having high sensitivity.

  The radical photopolymerization initiator is preferably blended in the total composition in an amount of 0.01 to 10% by weight, particularly 0.5 to 7% by weight. The upper limit of the blending amount is preferably in this range from the viewpoints of the curing characteristics of the composition, the mechanical properties and optical characteristics of the cured product, handling, and the like, and the lower limit of the blending amount is preferably in the range of preventing a decrease in the curing rate.

  The composition of the present invention may further contain a photosensitizer. Examples of the photosensitizer include triethylamine, diethylamine, N-methyldiethanolamine, ethanolamine, 4-dimethylaminobenzoic acid, 4-dimethyl Examples include methyl aminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate and the like, and examples of commercially available products include Ubekryl P102, 103, 104, 105 (manufactured by UCB). .

  Further, in addition to the above components, various additives as necessary include, for example, antioxidants, ultraviolet absorbers, light stabilizers, silane coupling agents, coating surface improvers, thermal polymerization inhibitors, leveling agents, surfactants. Colorants, storage stabilizers, plasticizers, lubricants, solvents, fillers, anti-aging agents, wettability improvers, mold release agents, and the like can be blended as necessary.

  Here, examples of the antioxidant include Irganox 1010, 1035, 1076, 1222 (manufactured by Ciba Specialty Chemicals Co., Ltd.), Antigen P, 3C, FR, GA-80 (manufactured by Sumitomo Chemical Co., Ltd.). Examples of the ultraviolet absorber include Tinuvin P, 234, 320, 326, 327, 328, 329, 213 (manufactured by Ciba Specialty Chemicals Co., Ltd.), Seesorb 102, 103, 110, 501; 202, 712, 704 (above, manufactured by Sipro Kasei Co., Ltd.) and the like. Examples of the light stabilizer include Tinuvin 292, 144, 622LD (above, manufactured by Ciba Specialty Chemicals Co., Ltd.), Sanol LS770 ( Sankyo Co., Ltd.), Sumisorb TM-0 1 (manufactured by Sumitomo Chemical Co., Ltd.) and the like. Examples of the silane coupling agent include γ-aminopropyltriethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, commercially available Examples of the product include SH6062, 6030 (above, manufactured by Toray Dow Corning Silicone Co., Ltd.), KBE903, 603, 403 (above, manufactured by Shin-Etsu Chemical Co., Ltd.) and the like. Examples include silicone additives such as dimethylsiloxane polyether and nonionic fluorosurfactants, and commercially available silicone additives include DC-57, DC-190 (above, manufactured by Dow Corning), SH-28PA, SH-29PA, SH-30PA, SH-190 (above, Toray Dow Corning Silicone Co., Ltd.), KF351, KF352, KF353, KF354 (above, manufactured by Shin-Etsu Chemical Co., Ltd.), L-700, L-7002, L-7500, FK-024-90 (above, Nihon Unicar Co., Ltd.) )), And commercially available non-ionic fluorosurfactants include FC-430, FC-171 (above 3M), Megafac F-176, F-177, R-08, F780 (above Dainippon Ink Co., Ltd.) and the like, and the release agent includes Prisurf A208F (Daiichi Kogyo Seiyaku Co., Ltd.).

  The organic solvent for adjusting the viscosity of the resin liquid of the present invention may be any organic solvent that can be mixed without unevenness such as precipitates, phase separation, and cloudiness when mixed with the resin liquid. For example, acetone, methyl ethyl ketone, Examples thereof include methyl isobutyl ketone, ethanol, propanol, butanol, 2-methoxyethanol, cyclohexanol, cyclohexane, cyclohexanone, toluene, and the like.

  When an organic solvent is added, it is necessary to dry and evaporate the organic solvent during the manufacturing process of the product. However, if a large amount of residual solvent remains in the product, the mechanical properties of crystallization deteriorate. There is also a concern that the organic solvent evaporates and diffuses during use as a product, causing bad odor and adverse health effects. For this reason, organic solvents having a high boiling point are not preferable because the amount of residual solvent increases.

  However, if the boiling point is too low, it will evaporate violently, resulting in rough surface, condensation water adhering to the surface of the composition due to the heat of vaporization during drying, resulting in surface defects and vapor concentration. It becomes higher and the risk of ignition etc. increases.

  Therefore, the boiling point of the organic solvent is preferably 50 ° C. or higher and 150 ° C. or lower, and more preferably 70 ° C. or higher and 120 ° C. or lower. From the viewpoint of the solubility of the material and the boiling point, the organic solvent is preferably methyl ethyl ketone (bp. 79.6 ° C), 1-propanol (bp. 97.2 ° C) or the like.

  The amount of the organic solvent added to the resin solution of the present invention depends on the type of the solvent and the viscosity of the resin solution before the addition of the solvent. , 40% by weight or less, preferably 15% by weight or more and 30% by weight or less. If the amount of the organic solvent added is too small, the effect of reducing the viscosity and the effect of increasing the coating amount are small, and the coating property is not sufficiently improved.

  However, if the resin liquid is diluted too much, the viscosity is too low and the liquid flows on the sheet-like body to cause unevenness, or the liquid turns around the back surface of the sheet-like body. In addition, the drying process may not be sufficient, and a large amount of organic solvent may remain in the product, resulting in deterioration of product function, volatilization during product use, generation of bad odors, and adverse health effects. Occurs.

  The resin liquid of the present invention can be produced by mixing the above-mentioned components by a conventional method, and can be produced by heating and dissolving as necessary. The viscosity of the resin liquid thus prepared is usually 10 to 50000 mPa · s / 25 ° C.

  When the resin liquid is supplied to the sheet W or the embossing roller 13, if the viscosity is too high, it is difficult to supply the composition uniformly. When manufacturing a lens, uneven coating, undulation, and air bubbles are generated. For this reason, it becomes difficult to obtain the target lens thickness, and the lens performance cannot be fully exhibited.

  This tendency is particularly noticeable when the line speed is increased. Accordingly, in this case, the liquid viscosity is preferably low, preferably 10 to 100 mPa · s, and more preferably 10 to 50 mPa · s. Such a low viscosity can be adjusted by adding an appropriate amount of an organic solvent. Further, the viscosity can be adjusted by setting the temperature of the coating solution to be kept warm.

  On the other hand, if the viscosity after evaporation of the solvent is too low, it may be difficult to control the lens thickness when embossing with the embossing roller 13, and a uniform lens with a certain thickness may not be formed. A preferred viscosity is 10 to 3000 mPa · s. When an organic solvent is mixed, by providing a step of evaporating the organic solvent by heat drying or the like between the steps of supplying the resin solution and embossing with the embossing roller 13, the viscosity is low when the resin solution is supplied. Thus, when the embossing roller 13 is used for embossing, the organic solvent is dried and the embossing roller 13 can be uniformly embossed with a resin solution having a higher viscosity.

  In the case of a prism lens sheet, the cured product obtained by curing the resin liquid of the present invention with radiation particularly preferably has the following physical properties (refractive index, softening point).

  The refractive index is preferably 1.55 or more and more preferably 1.56 or more at 25 ° C. of the cured product. This is because when the refractive index at 25 ° C. of the cured product is less than 1.55, when a prism lens sheet is formed using this composition, sufficient front luminance may not be ensured.

  As a softening point, 40 degreeC or more is preferable and 50 degreeC or more is more preferable. This is because if the softening point is less than 40 ° C., the heat resistance may not be sufficient.

  Next, returning to FIG. 1, the operation of the embossed sheet manufacturing apparatus 10 will be described. The sheet W is sent out from the sheet-like body supply means 11 at a constant speed. The sheet W is wound around the first suction drum 24, is sucked and held, and continuously travels. Next, the sheet W is sent to the dust remover 28, and dust attached to the surface of the sheet W is removed.

  Next, the sheet W is fed into the coating unit 12 and the resin liquid is applied to the surface of the sheet W. After the application, the resin liquid applied to the sheet W is dried by the drying means 19 and the solvent is evaporated. Thus, before the sheet W is wound around the embossing roller 13 and cured, a step of drying the solvent contained in the coating layer is provided, so that the function of the product due to the added solvent remaining after curing is provided. There is no worry about deterioration or strength deterioration of the cured film. Similarly, there is no concern that the solvent will be released during use of the product, resulting in malodors or adverse health effects.

  Next, the sheet W is fed into a forming unit composed of an embossing roller 13 and a nip roller 14. As a result, roller forming is performed while pressing the continuously running sheet W with the rotating embossing roller 13 and the nip roller 14 at the 3 o'clock position of the embossing roller 13. That is, the sheet W is wound around the rotating embossing roller 13, and the unevenness on the surface of the embossing roller 13 is transferred to the resin layer.

  Next, in a state where the sheet W is wound around the embossing roller 13, the resin curing unit 15 transmits the sheet W and irradiates the resin liquid layer with radiation, thereby curing the resin liquid layer. Thereafter, the sheet W is peeled off from the embossing roller 13 by winding the sheet W around the peeling roller 16 at the 9 o'clock position of the embossing roller 13.

  In addition, although not shown in FIG. 1, in order to further accelerate hardening after peeling the sheet | seat W, radiation irradiation can also be performed again.

  The peeled sheet W is conveyed to the defect inspection means 21 and the defect of the concavo-convex pattern transferred and formed on the sheet W is inspected. By such defect inspection means 21, it is possible to inspect defects in the concavo-convex pattern transferred and formed on the sheet W, and it becomes easy to eliminate defective portions.

  Next, the sheet W is conveyed to the dancer roller 30, and the tension of the sheet W is controlled by the moving up and down operation of the moving roller 30C provided between the fixed rollers 30A and 30B. Since the dancer roller 30 (tension control means) controls the tension of the sheet W, the traveling speed of the sheet W is stabilized and the transfer shape is improved.

  Next, the sheet W is wound around the second suction drum 26, sucked and held, and continuously travels.

  Next, the sheet W is conveyed to the edge position control means 32, and the width direction position of the sheet W is controlled. The concavo-convex sheet of the present invention forms a fine pattern on the sheet surface, so if there is a deviation or fluctuation during sheet conveyance, it leads to the occurrence of defects very sensitively. If the position can be controlled, the above-described defect can be effectively prevented.

  Next, the sheet W is conveyed to the sheet take-up means 18, the protective film H supplied from the protective film supply means 17 is supplied to the surface of the sheet W, and the sheet take-up means 18 is wound in a state where both films overlap. It is wound up by a take-up roll and stored. FIG. 7 shows a schematic cross-sectional shape after completion of such a sheet W. On the surface of the sheet W, a resin layer F to which the unevenness on the surface of the embossing roller 13 is transferred is formed.

  The completed sheet W wound up and stored by the winding roll can be cut off to a product size offline after a series of steps. Such a completed sheet W is preferably used as an optical film.

  According to the present embodiment described above, the radiation curable resin is applied to the surface of the continuously running sheet W through a series of processes from the upstream side, and the sheet W is wrapped around the embossing roller 13 to provide unevenness on the surface. The coating layer is cured by irradiating with radiation in a state where the film is transferred, the sheet W is peeled off from the embossing roller 13, the protective film H is laminated on one side or both sides, and wound into a roll. Therefore, since winding can be performed in a series of steps, it can be manufactured with high quality without defects and with high line speed and high productivity.

  As mentioned above, although the example of embodiment of the manufacturing method and apparatus of the uneven | corrugated sheet | seat which concerns on this invention was demonstrated, this invention is not limited to the example of the said embodiment, Various aspects can be taken.

  For example, in the example of the present embodiment, an aspect using the roller-shaped embossing roller 13 is adopted, but an aspect using an uneven pattern (embossed shape) formed on the surface of a belt-like body such as an endless belt may also be used. Can be adopted. This is because even such a belt-like body acts in the same manner as a cylindrical roller, and the same effect can be obtained.

The figure which shows the structure of the manufacturing apparatus of the embossed sheet | seat with which this invention is applied. Sectional view showing the outline of the embossing roller Schematic diagram showing the configuration of the embossed sheet manufacturing equipment Conceptual diagram showing another configuration of the embossed sheet manufacturing apparatus Conceptual diagram showing another configuration of the embossed sheet manufacturing apparatus Conceptual diagram showing another configuration of the embossed sheet manufacturing apparatus Sectional view showing the outline of the embossed sheet The conceptual diagram which shows the structure of the manufacturing apparatus of the embossed sheet of a prior art example The conceptual diagram which shows the other structure of the manufacturing apparatus of the embossed sheet | seat of a prior art example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Embossed sheet manufacturing apparatus, 11 ... Sheet supply means, 12 ... Coating means, 13 ... Embossing roller, 14 ... Nip roller, 14a ... Air cylinder, 14b ... Rod, 15 ... Resin curing means (radiation irradiation device), 15a ... Radiation lamp, 15b ... Case (box), 16 ... Peeling roller, 17 ... Protective film supply means, 18 ... Sheet winding means, 21 ... Defect inspection means, 24 ... First suction drum, 26 ... Second suction Drum, 28 ... dust remover, 30 ... dancer roller, 32 ... edge position control means, 40 ... light shielding member, 42 ... connecting rod, H ... protective film, W ... sheet

Claims (20)

In the method for producing a concavo-convex sheet by transferring the concavo-convex on the surface of the concavo-convex roller to the surface of the sheet-like body,
A step of continuously running a belt-like flexible sheet-like body;
A step of applying a radiation curable resin to the surface of the sheet-like body running continuously to form a coating layer;
Winding the continuously running sheet-like body around the rotating concavo-convex roller, and transferring the concavo-convex surface of the concavo-convex roller to the coating layer;
A step of curing the coating layer by irradiating radiation in a state where the sheet-like body running continuously is wound around the uneven roller;
Peeling the sheet-like body running continuously from the concave-convex roller;
Laminating a protective film on one or both sides of the sheet-like body that is continuously running after peeling,
A step of winding the sheet-like body running continuously after lamination into a roll;
The manufacturing method of the uneven | corrugated shaped sheet | seat characterized by including.   The method for producing a concavo-convex sheet according to claim 1, further comprising a step of drying the solvent in the coating layer.   The concavo-convex sheet according to claim 1, further comprising a step of controlling a width direction position of the sheet-like body by detecting an end position in a width direction of the sheet-like body continuously running. Manufacturing method.   The concave-convex shape according to any one of claims 1 to 3, wherein the sheet-like body is continuously driven by a driving drum that sucks and holds the sheet-like body on an outer peripheral surface and rotates at a predetermined peripheral speed. Sheet manufacturing method.   The method for producing a concavo-convex sheet according to any one of claims 1 to 4, wherein a tension of the sheet-like body continuously running is controlled by a tension control means.   The method for producing a concavo-convex sheet according to any one of claims 1 to 5, comprising a step of cutting the sheet-like body wound up in a roll shape into a product size.   The method for producing a concavo-convex sheet according to any one of claims 1 to 6, comprising a step of inspecting a defect of the concavo-convex pattern transferred and formed on the sheet-like body.   The method for producing a concavo-convex sheet according to any one of claims 1 to 7, wherein the radiation is ultraviolet rays.   The method for manufacturing a concavo-convex sheet according to any one of claims 1 to 8, wherein a pitch of the concavo-convex pattern transferred and formed on the sheet-like body is 100 µm or less.   The method for producing a concavo-convex sheet according to any one of claims 1 to 9, wherein the concavo-convex sheet is used as an optical film.   The concavo-convex sheet according to any one of claims 1 to 10, wherein the concavo-convex sheet is produced by pressing the sheet-like body with at least one nip roller facing the concavo-convex roller. Production method.   In the step of irradiating the coating layer by irradiating radiation while the continuously running sheet-like body is wound around the uneven roller, the coating layer before the step of transferring the unevenness on the surface of the uneven roller to the application layer is applied. The method for producing a concavo-convex sheet according to any one of claims 1 to 11, wherein light is shielded so as not to be irradiated with the radiation. Sheet-like body supply means for feeding out a belt-like flexible sheet-like body;
A coating means for coating the surface of the sheet-like body with a radiation curable resin to form a coating layer;
Drying means for drying the solvent contained in the coating layer;
A transfer means for transferring the irregularities on the surface of the uneven roller onto the surface of the sheet-like body while winding the continuously traveling sheet-like member around a rotating uneven roller;
Curing means for curing the coating layer in a state where the sheet-like body is wound around the uneven roller;
Peeling means for peeling the sheet-like body from the concave-convex roller;
Laminating means for laminating a protective film on one or both sides of the sheet-like body after peeling;
A sheet-like body winding means for winding the sheet-like body after lamination into a roll;
An apparatus for producing an uneven sheet, comprising:   The apparatus for producing a concavo-convex sheet according to claim 13, wherein the transfer unit is at least one nip roller that faces the concavo-convex roller and clamps the sheet-like body. The curing means is a radiation irradiation device,
The light-shielding member is provided so that the radiation irradiated from said radiation irradiation apparatus may not be irradiated to the coating layer before the unevenness | corrugation on the uneven | corrugated roller surface is transferred and formed on the surface of a sheet-like body. The manufacturing apparatus of the uneven | corrugated sheet of description.   The concavo-convex sheet manufacturing apparatus according to claim 15, wherein the light shielding member is disposed between the radiation irradiation device and the nip roller and in proximity to the concavo-convex roller.   The apparatus for producing an uneven sheet according to claim 15 or 16, wherein the light shielding member is movable.   The concavo-convex sheet manufacturing apparatus according to claim 17, wherein the light shielding member is interlocked with the nip roller.   The apparatus for producing an uneven sheet according to any one of claims 15 to 18, wherein a distance between the light shielding member and the uneven roller is in a range of 1 to 10 mm. The radiation irradiation device comprises a radiation lamp and a box covering the radiation lamp,
The apparatus for producing a concavo-convex sheet according to claim 13, wherein the radiation irradiation port of the box is curved along the concavo-convex roller, and the radiation irradiator is installed close to the concavo-convex roller.

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