JP2008302574A - Manufacturing method of molded sheet - Google Patents

Abstract

The present invention provides a method for producing a molded sheet having a concavo-convex shape with greatly improved releasability and excellent shape quality and production efficiency.
A coating process for filling a roll-shaped mold having a concavo-convex pattern on the surface with an ionizing radiation curable resin, and a laminate for laminating the filled ionizing radiation curable resin on a base sheet. A step of irradiating the laminate of the base sheet and the ionizing radiation curable resin with ionizing radiation to cure the ionizing radiation curable resin of the laminate, and the ionizing radiation to the laminate. A molded sheet is produced by a mold release process in which the laminate is separated from the roll-shaped mold while irradiating the film.
[Selection] Figure 1

Description

  The present invention relates to a method for producing a molded sheet having an uneven shape on the surface using an ionizing radiation curable resin, and more particularly to a method for producing an optical film used in a rear projection television or projector.

  FIG. 7 is a schematic view for realizing a general method for producing a molded sheet. The base sheet 1 sent out from the sending roll 8 is pressure-bonded and laminated on a roll-shaped mold 3 having a concavo-convex pattern 4 formed on the surface by a pressing roll 9 and further conveyed by the driving force of the roll-shaped mold 3. Then, it is released from the roll-shaped mold 3 by the release guide roll 20 and wound up by the winding roll 10.

  The ionizing radiation curable resin 5 is applied to the concavo-convex pattern 4 formed on the surface of the roll-shaped mold 3 by the coating apparatus 2. The coated ionizing radiation curable resin 5 is laminated with the base material sheet 1 by a pressing roll 9 and cured by the ionizing radiation 7 irradiated from the ionizing radiation irradiation device 6. The base material sheet 1 laminated and integrated with the ionizing radiation curable resin 5 cured by irradiation with the ionizing radiation 7 is released by the release guide roll 20 and taken up by the take-up roll 10.

  However, in FIG. 7, the ionizing radiation curable resin 5 is cured to increase the adhesion between the ionizing radiation curable resin 5 and the base sheet 1, and the surface of the ionizing radiation curable resin 5 and the roll-shaped mold 3. Since the adhesive force with the concavo-convex pattern 4 formed on the substrate becomes strong, it is difficult to release the mold with the release guide roll 20. Since the mold release resistance in the mold release process by the mold release guide roll 20 is increased due to the adhesion between the ionizing radiation curable resin 5 and the concavo-convex pattern 4 formed on the surface of the roll mold 3, the base sheet As a result, cracks and chips are generated in the concavo-convex ionizing radiation curable resin 15 molded and transferred to 1, and it becomes difficult to accurately mold and transfer the concavo-convex shape to the base sheet 1. Further, in the uneven pattern 4 formed on the surface of the roll-shaped mold 3, a residue of the ionizing radiation curable resin 5 is generated due to cracks or chipping due to mold release resistance, and continuous production is not possible in the subsequent molding process. It becomes possible, and productivity is significantly reduced. Moreover, if the mold release resistance becomes larger than the strength of the base sheet 1, the base sheet 1 is damaged in the release process.

In order to solve the problems that occur during the mold release step, a method for manufacturing a molded sheet shown in FIG. 8 is known. FIG. 9 shows an enlarged view of a portion where the base sheet 1 and the mold 3 are in close contact with each other according to this manufacturing method. In this construction method, two types of ionizing radiation curable resins are used, each formed on the surface of the first ionizing radiation curable resin 23 having excellent adhesion to the base sheet 1 and the roll-shaped mold 3. The second ionizing radiation curable resin 24 excellent in releasability with the concavo-convex pattern 4 is used to prevent the base sheet 1 from being damaged at the time of release (see, for example, Patent Document 1).
JP 2004-249655 A

  However, in the prior art, two types of ionizing radiation curable resins are required to improve the releasability. For this reason, the molded sheet has a three-layer structure, and a bonding failure at the bonding surface in each layer is likely to occur, and the reliability of the sheet after molding is reduced.

  The present invention solves the above-mentioned conventional problems, and provides a method for producing a molded sheet having a concavo-convex shape with high production efficiency and excellent shape accuracy at a low cost by using one type of ionizing radiation curable resin. Objective.

  In order to solve the above-mentioned conventional problems, the method for producing a molded sheet of the present invention includes a coating process in which a roll-shaped mold having a concavo-convex pattern on the surface is filled with an ionizing radiation curable resin, and the filling into the base sheet. Laminating the laminated ionized radiation curable resin to create a laminate, and irradiating the laminate of the base sheet and the ionizing radiation curable resin with ionizing radiation, thereby the ionizing radiation of the laminate. It comprises a curing step of curing a cured resin and a release step of separating the laminate from the roll-shaped mold while irradiating the laminate with the ionizing radiation.

  The present invention solves the above-mentioned conventional problems, and according to the method for producing a molded sheet of the present invention, a highly reliable molded sheet can be produced with one ionizing radiation curable resin. Moreover, since only one coating apparatus is sufficient, a molded sheet can be manufactured at low cost.

  Hereinafter, embodiments of the method for producing a molded sheet of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a schematic view for realizing a method for producing a molded sheet in Embodiment 1 of the present invention. The base sheet 1 delivered from the delivery roll 8 is pressure-bonded to the roll-shaped mold 3 having the uneven pattern 4 formed on the surface by the pressing roll 9, and is conveyed along with the rotation of the roll-shaped mold 3. And wound on the winding roll 10. As a material for the base sheet 1, a sheet-shaped material such as a metal sheet or a resin sheet can be used as the base sheet 1 as necessary. For example, when used for various optical films for displays such as rear projection televisions and projectors, a light-transmitting resin such as polyethylene terephthalate, polymethyl methacrylate, methacryl styrene copolymer, polycarbonate, polyethylene naphthalate, A transparent resin substrate such as a cycloolefin polymer may be used. In this example, 100 μm of polyethylene terephthalate was used from the viewpoint of the substrate thickness, transparency, and strength, but the present invention is not limited to this, and any polyethylene terephthalate having a thickness of about 50 to 250 μm may be used.

  The molded sheet having a concavo-convex shape, which is the final product of the present invention, is produced in the order of a coating process, a lamination process, a curing process, and a mold release process. Hereinafter, each step will be described mainly with reference to FIG.

  First, the coating process will be described. The ionizing radiation curable resin 5 is applied to the surface of the roll-shaped mold 3 on which the concavo-convex pattern 4 is formed by the coating apparatus 2. As the material of the roll-shaped mold 3, metal nickel, aluminum, stainless steel and the like are suitable from the viewpoints of dimensional stability, durability, mechanical strength, etc. during microfabrication. In this embodiment, nickel is used. However, the present invention is not limited to this, and a resin material such as an epoxy resin, a urethane resin, or a fluororesin, or a composite material thereof can also be used. In this embodiment, the depth of the concavo-convex pattern 4 is 120 μm, but the present invention is not limited to this.

  As the ionizing radiation curable resin 5, urethane acrylate was used. Since this has excellent flexibility, durability, and cost performance, it is a very suitable material for fine molding of resin. However, the present invention is not limited to this, and ionization of a mixture such as a reaction diluent, a photopolymerization initiator, and a sensitizer is necessary for epoxy acrylate, polyester acrylate, maleimide, oxetane compound, vinyl ether compound, or a mixture thereof. Radiation curable resin 5 can also be used.

  In this example, coating was performed on the surface of the roll-shaped mold 3 using a dispenser for the coating apparatus 2. However, the present invention is not limited to this, and a roll coater, a baker applicator, a die coater, a comma roll, a spray coater, or a combination of these may be used as a coating apparatus.

  Next, the lamination process will be described. The ionizing radiation curable resin 5 coated on the surface of the roll-shaped mold 3 is laminated with the base sheet 1 by the pressing roll 9. At this time, the ionizing radiation curable resin 5 is filled in the concavo-convex pattern 4 formed on the surface of the roll-shaped mold 3 by the pressure of the pressing roll 9, and the excessive ionizing radiation curable resin 5 is concavo-convex pattern 4. Is rejected. The laminated base sheet 1 is conveyed to the take-up roll 10 while being in close contact with the surface thereof as the roll-shaped mold 3 rotates.

  Next, the curing process will be described. The electron beam irradiation device 13 is disposed immediately above the place where the laminated base sheet 1 first leaves the roll-shaped mold 3 and moves to the take-up roll 10 (this is referred to as a mold release start point). Then, the electron beam 14 is irradiated by the electron beam irradiation device 13, the ionizing radiation curable resin 5 in the uneven pattern 4 formed on the surface of the roll-shaped mold 3 is cured, and the base sheet 1 is closely bonded. To do. The electron beam irradiation device 13 has a filament cathode inside the device, the electron beam 14 is emitted according to the energization current, and the electron beam 14 is accelerated by applying a high voltage inside the electron beam irradiation device 13. A high-speed electron beam 14 having a predetermined acceleration voltage is generated.

When the electron beam 14 is applied to the laminated base sheet 1 and the pressing roll 9, it acts on the molecules of the ionizing radiation curable resin 5 to perform a curing reaction. The electron dose received by the ionizing radiation curable resin 5 is determined by the time during which the electron beam 14 irradiated from the electron beam irradiation device 13 and the ionizing radiation curable resin 5 are irradiated, and the normal ionizing radiation curable resin 5 is completely cured. The electron dose required for this is about 10 to 30 (kGy). In general, the penetration depth S (μm) of the electron beam 14 irradiated from the electron beam irradiation device 13 toward the substance is several from the acceleration voltage (kV) and the density ρ (g / cm ³ ) of the substance. 1 can be represented.

  Here, the electron dose penetrating into the substance, that is, the ionizing radiation curable resin 5 decreases as the depth increases in the depth direction, and reaches an electron dose that reaches the depth determined by the penetration depth of the electron beam 14 of Formula 1. Is almost zero. In this embodiment, the electron beam 14 sufficiently penetrates the acceleration voltage of the electron beam irradiation device 13 to a depth of 220 μm, which is the sum of the thickness of the base sheet 1 and the depth of the concavo-convex pattern 4 of the roll-shaped mold 3. Curing was performed at 150 kV.

  FIG. 2 shows the characteristics of the penetration depth of the electron beam 14 into the ionizing radiation curable resin 5 when an acceleration voltage of 150 kV is applied. As shown in FIG. 2, since the electron dose decreases according to the electron beam penetration depth, the electron dose at the part where the base sheet 1 and the roll-shaped mold 3 are in contact at the release point is large, and the roll-shaped mold 3 It decreases at the bottom of the concavo-convex pattern 4. Therefore, the curing of the ionizing radiation curable resin 5 starts from a portion where the base sheet 1 and the roll-shaped mold 3 are in contact with each other, and gradually proceeds to the bottom of the concavo-convex pattern 4 of the roll-shaped mold 3. In the present embodiment, the electron beam irradiation device 13 is used as the ionizing radiation irradiation device 6, but any device that generates energy capable of curing the ionizing radiation curable resin 5 may be used. Absent.

  Next, the mold release process will be described. FIG. 3 is a diagram for explaining a mold release step in the first embodiment of the present invention. As shown in FIG. 3, at the stage of starting the mold release process, the substrate sheet 1 that has been irradiated with the electron beam 14 receives an electron dose necessary for curing. Therefore, since the ionizing radiation curable resin 5 in the portion where the base sheet 1 and the roll-shaped mold 3 are in contact with each other is sufficiently cured, the base sheet 1 and the ionizing radiation curable resin 5 are firmly adhered. In addition, since the irradiated electron dose is small inside or at the bottom of the concavo-convex pattern 4 of the roll-shaped mold 3, the ionizing radiation curable resin 5 in this region is not sufficiently cured. Accordingly, the adhesion between the roll-shaped mold 3 and the ionizing radiation curable resin 5 is in a very weak state. Therefore, the base sheet 1 and the roll-shaped mold 3 can be easily separated, and the ionizing radiation curable resin 5 filled in the uneven pattern 4 of the roll-shaped mold 3 is reliably molded and transferred to the base sheet 1. be able to.

  The ionizing radiation curable resin 5 transferred to the base sheet 1 that has passed the release start point is not sufficiently cured. Therefore, it is necessary to further perform a curing process. Therefore, it is necessary to arrange | position the electron beam irradiation apparatus 13 so that the electron beam 14 may be irradiated to the base material sheet 1 continuously. The detailed state is shown in FIG. By expanding the electron beam irradiation area of the electron beam irradiation device 13, the ionizing radiation curable resin 5 that is continuously irradiated with the electron beam 14 on the base sheet 1 that has passed the release point and transferred to the base sheet 1 is obtained. Completely cure. Thereafter, the base sheet 1 is wound up by the winding roll 10.

  As described above, in Embodiment 1, the electron beam irradiation device 13 is arranged at the center of the release point, and the electron beam 14 is irradiated to the areas before and after the release start point, whereby the base sheet 1 is applied. The mold release is performed in the middle of the curing process of the ionizing radiation curable resin 5 to be transferred. Thereby, the laminated body of the base material sheet 1 and the ionizing radiation-curing resin 5 can be easily separated from the roll-shaped mold 3, and a method for producing a molded sheet having a concavo-convex shape with high productivity and excellent shape accuracy. Can be realized.

(Embodiment 2)
FIG. 4 is a schematic view for realizing the method for producing a molded sheet in the second embodiment of the present invention. The difference from the first embodiment is that the acceleration voltage attenuation adjusting member 11 is inserted between the electron beam irradiation device 13 and the release start point.

  The acceleration voltage attenuation adjusting member 11 is a member for adjusting the amount of acceleration of the electron beam 14 irradiated from the electron beam irradiation device 13 and adjusting the degree of curing of the ionizing radiation curable resin 5 in the depth direction. The electron beam emission device 13 can only generate the electron beam 13 having a uniform distribution of acceleration voltage by constant voltage pressurization. Therefore, in order to generate the electron beam 13 having a distribution in the acceleration voltage, the acceleration voltage attenuation member 11 is provided outside the electron beam irradiation apparatus 13 and the acceleration amount of the electron beam 13 is controlled by the position, thereby obtaining an equivalent. Thus, the voltage distribution applied to the electron beam 13 is adjusted to control the acceleration voltage.

  In this embodiment, the acceleration voltage attenuation adjusting member 11 is a titanium sheet having a thickness of 30 μm. However, the present invention is not limited to this, and any metal member can attenuate the electron beam 14 to a desired value. good.

  FIG. 5 is a diagram for explaining curing and release of a molded sheet using the acceleration voltage attenuation adjusting member 11a having a uniform sheet shape. In this embodiment, the acceleration voltage of the electron beam irradiation device 13 is set to 150 kV, a titanium sheet having a thickness of 30 μm is used as the sheet-shaped acceleration voltage attenuation adjusting member 11 a, and a polyethylene terephthalate having a thickness of 100 μm is used as the base sheet 1. As the ionizing radiation curable resin 5, a roll-shaped mold 3 having urethane acrylate and a depth pattern of the uneven pattern 4 of 120 μm was used.

  The characteristics of the acceleration voltage of the electron beam 14 irradiated from the electron beam irradiation device 13 toward the laminated body of the base sheet 1 and the ionizing radiation curable resin 5 near the release start point are shown in the lower part of FIG. The characteristic shown here indicates the acceleration voltage after the acceleration amount of the electron beam 14 is attenuated by the acceleration voltage attenuation adjusting member 11a. A region A indicates a region where the irradiated electron beam 14 is attenuated by the sheet-shaped acceleration voltage attenuation adjusting member 11a, and a region B is a region where the roll-shaped mold 3 and the base sheet 1 are not separated. The region where there is no attenuation of the electron beam 14 by the acceleration voltage attenuation adjusting member 11a is shown. A region C indicates a region that is irradiated with the electron beam 14 in a region on the winding roll 10 side from the release start point.

  The acceleration voltage in the region A is attenuated according to the material and thickness of the sheet-like acceleration voltage attenuation adjusting member 11a. In the case of the titanium sheet having a thickness of 30 μm used in this embodiment, the acceleration voltage is attenuated by about 40 kV. . Accordingly, in the region A, the acceleration voltage is attenuated from 150 kV to 110 kV, so that the penetration depth of the electron beam 14 is about 140 μm from Equation 1. Therefore, in the region A, the ionizing radiation curable resin 5 starts to be cured from the surface in contact with the substrate sheet 1 having a thickness of 100 μm to a depth of about 40 μm.

  In the region B, since the acceleration voltage is not attenuated, the electron beam radiation device 13 is irradiated with the electron beam 14 having an acceleration voltage of 150 kV, so that the bottom of the concave / convex pattern 4 of the roll-shaped mold 3 is filled. The ionizing radiation curable resin 5 also begins to cure.

  Since the release start point is at the boundary between the region B and the region C, the vicinity of the substrate sheet 1 on the irradiation side receives an electron dose necessary for curing at the release start point, and the ionizing radiation curable resin 5 is sufficiently provided. It will be in the hardened state and the base material sheet 1 and the ionizing radiation hardening resin 5 will adhere | attach firmly. However, with respect to the inside or bottom of the concavo-convex pattern 4 formed on the surface of the roll-shaped mold 3, the irradiation electron dose is due to the effect of the titanium sheet provided as the sheet-shaped acceleration voltage attenuation adjusting member 11 a. Since it is not sufficient, the ionizing radiation curable resin 5 is not sufficiently cured, and the adhesion with the roll-shaped mold 3 is very weak. Therefore, by starting the mold release step in such a state, the laminate of the base sheet 1 and the ionizing radiation curable resin 5 can be easily released from the roll-shaped mold 3, and the uneven pattern 4 It is possible to reliably mold and transfer the base sheet 1 with high accuracy.

  Next, in region C, the ionizing radiation is continuously irradiated from the electron beam irradiation device 13 to the concavo-convex ionizing radiation curable resin 15 formed and transferred onto the base sheet 1 and the base sheet 1. The cured resin 15 is completely cured. Thereafter, the base sheet 1 is released from the roll-shaped mold 3 by the take-up roll 10 and is taken up by the take-up roll 10.

  Another embodiment of the present invention is shown in FIG. This is an example in which the acceleration voltage attenuation adjusting member uses an acceleration voltage attenuation adjusting member having a tapered thickness instead of a sheet shape.

  As shown in FIG. 6, the acceleration voltage attenuation adjusting member 11b of the present embodiment has a tapered cross section and is arranged so that its thickness decreases toward the release start point. The characteristics of the acceleration voltage of the electron beam 14 applied to the laminate of the base sheet 1 and the ionizing radiation curable resin 5 on the roll-shaped mold 3 at this time are shown in the lower part of FIG. The characteristic shown here indicates the acceleration voltage after the acceleration amount of the electron beam 14 is attenuated by the acceleration voltage attenuation adjusting member 11b. Here, the region D indicates a region in which the acceleration voltage of the electron beam 14 is attenuated by the acceleration voltage attenuation adjusting member 11b in the electron beam irradiation region, and the region E is from the release start point to the winding roll 10 side. The area | region of the electron beam 14 irradiated to the base material sheet 1 is shown.

  In the region D, the acceleration voltage of the electron beam 14 is attenuated according to the material and thickness of the tapered acceleration voltage attenuation adjusting member 11b. In this embodiment, the acceleration voltage attenuation adjusting member 11b is formed by giving a taper angle of 0.02 degrees to a 70 μm thick titanium sheet, and the end of the acceleration voltage attenuation adjusting member 11b is arranged at the center of the release point. . As shown in the lower diagram of FIG. 6, the acceleration voltage characteristics are greatly attenuated in the first region of the region D, and thereafter the acceleration voltage gradually increases. Therefore, in the initial stage of the region D, curing starts from the portion of the ionizing radiation curable resin 5 that is in contact with the base material sheet 1, and the bottom portion extends from the inside of the concavo-convex pattern 4 of the roll-shaped mold 3 as the acceleration voltage increases. Curing of the ionizing radiation curable resin 5 starts.

  The boundary between the region D and the region E is a mold release start point, and the mold release process starts here. In the mold release start part, the vicinity of the substrate sheet 1 on the irradiation side receives an electron dose necessary for curing, and the ionizing radiation curable resin 5 is sufficiently cured, and the substrate sheet 1 and the ionizing radiation are cured. The close contact with the resin 5 is also in a strong state. Further, the ionizing radiation curable resin 5 inside or at the bottom of the concavo-convex pattern 4 formed on the surface of the roll-shaped mold 3 is irradiated by the effect of the titanium sheet of the tapered acceleration voltage attenuation adjusting member 11b. Since the electron dose is not sufficient, the curing is not sufficient, and the adhesion between the uneven pattern 4 of the roll-shaped mold 3 and the ionizing radiation curable resin 5 is very weak. By starting the mold release step in such a state, the laminate of the base sheet 1 and the ionizing radiation curable resin 5 can be easily released from the roll-shaped mold 3, and the uneven pattern 4 can be surely formed. It can be molded and transferred to the base sheet 1.

  Further, even after the release, as shown in FIG. 6, in region E, the substrate sheet 1 and the uneven ionizing radiation curable resin 15 formed and transferred onto the substrate sheet 1 are continued from the electron beam irradiation device 13. By irradiating with an electron beam 14, it is completely cured. The base sheet 1 laminated and integrated with the ionized radiation curable resin 15 having a concavo-convex shape which has been cured and cured by irradiation with the electron beam 14 is released from the roll-shaped mold 3 by the take-up roll 10 and is taken up. 10 is wound up.

  As described above, in the second embodiment, the acceleration voltage attenuation adjusting member 11 that attenuates and adjusts the acceleration voltage is provided in the irradiation region of the electron beam 14, and the mold release is started from the middle of the curing process in the irradiation region. Thus, the depth of curing of the ionizing radiation curable resin 5 can be arbitrarily adjusted, and a method for producing a molded sheet having a concavo-convex shape that is easy to release from the roll-shaped mold 3 and has excellent shape accuracy. Can be realized.

  In the second embodiment, as the shape of the acceleration voltage attenuation adjusting member 11, a sheet shape or a taper shape having a uniform thickness is used for ease of processing and attenuation characteristics of the acceleration voltage. It is not limited. Moreover, although the electron beam irradiation apparatus 13 excellent in the high energy utilization efficiency and the point of permeability was used as the ionizing radiation irradiation apparatus 6, it is not limited to this in particular.

  The method for producing a molded sheet according to the present invention can realize a highly productive production method excellent in releasability from a roll-shaped mold, and can realize a molded sheet having an accurate uneven shape at low cost. Therefore, it is useful as a method for producing various molded films, particularly optical films used for rear projection televisions and projectors.

Schematic for realizing the method for producing a molded sheet according to Embodiment 1 of the present invention. The figure for demonstrating the characteristic of the penetration depth of the electron beam in Embodiment 1 of this invention The figure for demonstrating the mold release process in Embodiment 1 of this invention Schematic for realizing the method for producing a molded sheet in Embodiment 2 of the present invention The figure for demonstrating an example hardening and mold release in Embodiment 2 of this invention The figure for demonstrating hardening of another example and mold release in Embodiment 2 of this invention Schematic for realizing a general method for producing molded sheets Schematic diagram for realizing a conventional method for producing a molded sheet The figure for demonstrating the lamination | stacking state in the manufacturing method of the conventional molded sheet

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Substrate sheet | seat 2 Coating apparatus 3 Roll-shaped shaping | molding die 4 Irregular shape pattern 5 Ionizing radiation hardening resin 6 Ionizing radiation irradiation apparatus 7 Ionizing radiation 8 Sending roll 9 Pressing roll 10 Winding roll 11 Acceleration voltage attenuation | damping adjustment member 11a Sheet shape Acceleration voltage attenuation adjusting member 11b Tapered acceleration voltage attenuation adjusting member 13 Electron beam irradiation device 14 Electron beam 15 Molded and transferred ionizing radiation curable resin 20 Release guide roll 21 First coating device 22 Second coating Coating device 23 First ionizing radiation curable resin 24 Second ionizing radiation curable resin

Claims (10)

A coating step of filling an ionizing radiation curable resin into a roll-shaped mold having a concavo-convex pattern on the surface;
A laminating step of laminating the filled ionizing radiation curable resin on the base sheet to create a laminate;
A curing step of irradiating the laminate of the base sheet and the ionizing radiation curable resin with ionizing radiation to cure the ionizing radiation curable resin of the laminate,
A mold release step for separating the laminate from the roll-shaped mold while irradiating the laminate with the ionizing radiation. 2. The method for producing a molded sheet according to claim 1, wherein in the curing step, an acceleration voltage attenuation step is provided in which an acceleration voltage attenuation adjustment member is provided in the irradiation path of the ionizing radiation. The said lamination process WHEREIN: The said base material sheet is a manufacturing method of the molded sheet of Claim 1 and 2 which creates the said laminated body so that it may wind around the said roll-shaped shaping | molding die. In the said hardening process, the said ionizing radiation is arrange | positioned so that the range before and behind the mold release point which the said laminated body isolate | separates from the said roll-shaped shaping | molding die may be irradiated. Method. 3. The method for producing a molded sheet according to claim 1, wherein the roll-shaped mold is made of any one of metals mainly composed of nickel, aluminum, and stainless steel. 3. The molded sheet according to claim 1, wherein the base sheet is made of any one of polyethylene terephthalate, polymethyl methacrylate, methacryl styrene copolymer, polycarbonate, polyethylene naphthalate, and cycloolefin polymer. Method. 3. The method for producing a molded sheet according to claim 1, wherein the ionizing radiation curable resin is any one of urethane acrylate, epoxy acrylate, polyester acrylate, maleimide, oxetane compound, and vinyl ether compound. The method for producing a molded sheet according to claim 2, wherein the acceleration voltage attenuation adjusting member is made of plate-like titanium having a thickness of 30 μm. The method for producing a molded sheet according to claim 8, wherein the acceleration voltage attenuation adjusting member is disposed so as not to cover a position where the laminate is separated from the roll-shaped mold. The method for producing a molded sheet according to claim 2, wherein the acceleration voltage attenuation adjusting member is made of a titanium plate having a taper formed in a thickness direction.

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