WO2008026277A1 - Procédé de production d'une feuille de disque de transport durcissant par effet photochimique adapté pour la production de support d'enregistrement d'informations optique et feuille de disque de transport durcissant par effet photochimique produite au moyen de ce procédé - Google Patents

Procédé de production d'une feuille de disque de transport durcissant par effet photochimique adapté pour la production de support d'enregistrement d'informations optique et feuille de disque de transport durcissant par effet photochimique produite au moyen de ce procédé Download PDF

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Publication number
WO2008026277A1
WO2008026277A1 PCT/JP2006/317204 JP2006317204W WO2008026277A1 WO 2008026277 A1 WO2008026277 A1 WO 2008026277A1 JP 2006317204 W JP2006317204 W JP 2006317204W WO 2008026277 A1 WO2008026277 A1 WO 2008026277A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
punching
photocurable transfer
blade
transfer material
Prior art date
Application number
PCT/JP2006/317204
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English (en)
Japanese (ja)
Inventor
Hideki Kitano
Takato Inamiya
Kenji Murayama
Original Assignee
Bridgestone Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corporation filed Critical Bridgestone Corporation
Priority to PCT/JP2006/317204 priority Critical patent/WO2008026277A1/fr
Publication of WO2008026277A1 publication Critical patent/WO2008026277A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/384—Cutting-out; Stamping-out using rotating drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3846—Cutting-out; Stamping-out cutting out discs or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor

Definitions

  • the present invention relates to an optical information recording medium in which information such as large-capacity characters such as DVD (Digital Versatile Disc) and CD (Compact Disc), audio, moving images, etc. is recorded as a digital signal and can be recorded in Z
  • the present invention relates to a photo-curable transfer disk sheet that is advantageously used in the production of and a method for producing the same.
  • Audio CDs and CD-ROMs are widely used as recorded optical information recording media with pits formed on the surface as digital signals. Recently, pit recording is possible on both sides that can also record moving images. It has been attracting attention as a next-generation recording medium for DVD-powered CDs and has already been used. Also, CD-R, CD-RW, DVD-R, DVD-RW, etc., which can be recorded by the user in which the pits and groups are formed, are already used.
  • a double-sided DVD has been manufactured by melting a polycarbonate resin using a stamper in which the unevenness of the signal bit is opposite to that of a male and female, and injection molding to form a transparent surface having unevenness on the surface.
  • a reflective substrate is prepared by depositing a metal such as aluminum on the uneven surface by sputtering or the like, and a transparent resin substrate on which the reflective layer is formed is made to face the reflective layer with an adhesive. It was done by pasting together.
  • the width of the groove is narrow and the pit is also small. For this reason, it is necessary to reduce the spot of the reading laser to a small size. When the spot is reduced, the disc tilt is greatly affected. Cannot play even if it is bent. In order to compensate for these disadvantages, it is considered to reduce the thickness of the substrate and the thickness of the cover layer on the pit on the laser irradiation side to about 0.1 mm.
  • Non-Patent Document 1 on page 68 describes a DVD manufacturing method that meets the above requirements. This will be explained with reference to FIG.
  • Polycarbonate having a reflective layer (or recording layer) on the concave / convex surface is provided by applying ultraviolet curing resin 75A on the reflective layer of the disc substrate (l.lmm) 74a having the reflective layer (or recording layer) 76a on the concave / convex surface.
  • An ultraviolet curable resin 75B is provided on the stamper 74b by coating.
  • the substrate is turned upside down, the substrate and the stamper are attached, and ultraviolet rays are irradiated from the stamper side to cure the ultraviolet curing resins 75A and 75B.
  • the stamper 74b is removed from the UV-cured resin 75B layer, a reflective layer (or recording layer) 76b is formed on the uneven surface, and a cover layer (thickness of about 0.1 mm) 77 is formed thereon.
  • the surface of the disk substrate and the stamper is provided with an ultraviolet curable resin by coating, and then the substrate is turned upside down and attached to the stamper.
  • an ultraviolet curable resin by coating
  • the substrate is turned upside down and attached to the stamper.
  • the ultraviolet ray curable resin has a problem that deformation such as warpage of a medium resulting in large shrinkage during curing is conspicuous.
  • Patent Document 1 discloses a method of manufacturing an optical information recording medium such as a DVD that can improve the above-mentioned problems.
  • a production method using a photocurable transfer sheet containing a reactive polymer having a photopolymerizable functional group and having a photocurable composition that can be deformed by pressurization is described. That is, instead of the ultraviolet curable resin, the above-mentioned problem can be avoided by transferring the concave and convex surfaces by pressing the solid photocurable transfer sheet against the stamper.
  • FIG. 6 shows a typical example of the basic structure of such a photocurable transfer disk sheet.
  • a laminate 65 of a disc-like photocurable transfer layer 62d and a disc-like release sheet 63d is laminated on the surface of the long release sheet 61 to form a photocurable transfer disc sheet 60.
  • An inner hole 66 is provided through the laminate 65 and the long release sheet 61.
  • the disc-like photocurable transfer layer 62d is a disc having a donut-shaped hole, it can be advantageously used in the production of optical information recording media such as DVDs by peeling the upper and lower release sheets. It has become.
  • a photocurable transfer disk sheet is obtained by performing a disk-like punching process from a photocurable transfer material sheet in which a photocurable transfer layer and a release sheet are sequentially laminated on the surface of a long release sheet. Can be manufactured.
  • Patent Document 2 Japanese Patent Application Laid-Open No. 2004-79052 discloses a punching process using a punching blade provided annularly on the surface of a rotating mouth ring as such a punching cage, An optical disk manufacturing method using a so-called rotary die-cut punching process for a laminated sheet material is disclosed!
  • Patent Literature l WO03Z ⁇ 32305Al
  • Patent Document 2 JP 2004-79052 A
  • Non-Patent Document 1 Nikkei Electronics (Nikkei Electronics), November 5, 2001 Disclosure of Invention
  • the disc-shaped punching process of the photocurable transfer material sheet is required to be continuously performed while the long photocurable transfer material sheet is conveyed, and punching with higher accuracy is required. Required. This high accuracy is required in two ways. First of all, due to the properties required for optical information recording media, the disk shape must be very close to a perfect circle, and for this reason, a highly accurate perfect circular shape is required. Next, for the purpose of providing a disk-shaped laminate on the sheet, the outer circle to be punched punches out the first release sheet and the photocurable transfer layer, while leaving the second release sheet without punching. Punching depth (a half cut compared to a full cut that completely punches the second release sheet) is required. Not.
  • Patent Document 2 Japanese Patent Laid-Open No. 2004-79052
  • Patent Document 2 Japanese Patent Laid-Open No. 2004-79052
  • the object of the present invention is suitable for continuous processing of a long photocurable transfer material sheet under conveyance, achieves the accuracy of the punching depth in the punching process, and avoids crushing of the punched section.
  • the object of the present invention is to provide a method for producing a photo-curing transfer disc sheet, which further improves the accuracy of a disc-shaped perfect circle.
  • an object of the present invention is to provide a photocurable transfer disk sheet that is manufactured by the above manufacturing method and provided with a highly accurate disk-shaped laminate suitable for manufacturing an optical information recording medium. is there.
  • the present inventors aim to press the roll having a punching blade protruding on the surface of the photocurable transfer material sheet under conveyance by rotating it in synchronization with the conveyance. Therefore, a method for producing a photocurable transfer disk sheet by performing a punching process for punching the photocurable transfer material sheet into a disk shape,
  • planar shape of the cutting edge of the punching blade in the plane development view of the surface of the roll is achieved by a manufacturing method characterized by having an elliptical shape that is long in the conveying direction of the photocurable transfer material sheet. I saw and started.
  • a photo-curable transfer disk sheet can be manufactured in which the precision of the disk-shaped perfect circle is further improved.
  • the inventors of the present invention the deviation from the perfect circle of punching by so-called rotary die cut, This was thought to be due to punching in the stretched state in the transport direction as a result of receiving tension in the transport direction at the part where the transported sheet was cut.
  • the disk-shaped laminate thus produced is not subjected to tension thereafter, and contracts and is used for the subsequent use. Therefore, the true circular shape force of the rotary die-cut punching blade is expected. It is thought that the disk will not satisfy the accuracy of the circle. Therefore, paying attention to this point, an elliptical punching blade (the plane of the cutting edge of the punching blade in the plan view of the roll surface in advance) so that the desired circular shape is obtained when the tension is removed.
  • the present invention has been conceived of the present invention in which rotary die cutting is performed using a punching blade having an elliptical shape that is long in the conveying direction of the photo-curable transfer material sheet.
  • the elliptical shape has the following formula I:
  • the conveyance direction of the photocurable transfer material sheet is the X axis
  • the roll axial direction is the y axis
  • r is the minor axis radius of the ellipse
  • p X r is the major axis radius of the ellipse
  • the P is preferably in the range of 1.1 ⁇ > 1.
  • the shape of the cutting edge of the punching blade in a plan development view of the surface of the roll in plan view is an oval shape represented by the above formula I.
  • the two ellipses are arranged so that the centers of the two ellipses are the same.
  • p and 1S p ⁇ p have a relationship. The relationship between the inner and outer blades
  • the p-force is preferably in the range of 1.10 ⁇ p ⁇ 1.04. B b in this range
  • the present invention also provides the following steps:
  • a method for producing a photocurable transfer disk sheet comprising:
  • the shape of the cutting edge of the inner circle punching blade in a plan view and the shape of the cutting edge of the outer circle punching blade in a plan view are both in the plane development view of the surface of the roll.
  • the photocurable transfer material sheet is conveyed such that an ellipse punched by the punching blade becomes a perfect circle without being subjected to a tension force due to conveyance. It is preferable to increase or decrease the speed. By adjusting the conveyance speed in this way and optimizing the oval shape of the punching blade and the apparatus including the conveyed sheet, roll, etc., it is possible to obtain a punching shape extremely close to a perfect circle. .
  • the present invention is also in a photocurable transfer disk sheet manufactured by the above-described manufacturing method.
  • the production method of the present invention is suitable for continuous processing of a long photocurable transfer material sheet under conveyance, achieves the accuracy of the punching depth in the punching process, and avoids crushing of the punched section.
  • the accuracy of the disc-shaped perfect circle can be further improved to produce a photocurable transfer disc sheet.
  • sequential punching such as Thomson blades
  • it is superior in punching depth accuracy and avoiding crushing of the punching section.
  • It is excellent in terms of the accuracy of the perfect circle and the accuracy of the perfect circle of the shape of the hole in the center of the disk.
  • the obtained optically curable transfer disk sheet is provided with a disk-shaped laminate having high thickness accuracy, uniformity, and roundness accuracy required for optical information recording media such as DVDs. It is particularly suitable for the production of high-precision optical information recording media.
  • the present invention also resides in a photocurable transfer disk sheet having the above-described excellent characteristics.
  • FIG. 1 is an explanatory diagram of an example of a rotary die cutter used in the production method of the present invention.
  • FIG. 2 is a cross-sectional view illustrating an example of a flow in which a rotary die cutter is used for a sheet under conveyance in the present invention.
  • FIG. 3 is an explanatory diagram showing an example of a flow for producing a photocurable transfer disc sheet from a photocurable transfer material sheet by the production method of the present invention.
  • FIG. 4 is an explanatory view of an elliptical shape of a cutting edge of a punching blade used in the manufacturing method of the present invention.
  • FIG. 5 is a development view illustrating a punching blade having a circular cutting edge.
  • FIG. 7 is a cross-sectional view showing a procedure of a method for manufacturing an optical information recording medium described in Nikkei Electronics.
  • FIG. 1 is a diagram for explaining a typical example of a roll (rotary die cutter) having a punching blade protruding on the surface used in the manufacturing method of the present invention.
  • Figure 1 (1—
  • FIG. 1 is an upper perspective view of an example of a roll (rotary die cutter) having a punching blade used in the present invention.
  • the rotary die cutter 10 is provided with an inner blade 15, an outer blade 16, a force S, and a roll surface 11 protruding from the punching blade. This projecting on the surface
  • the punching blade is pressed against the sheet by rotating in synchronization with the sheet to which the roll is conveyed, and simultaneously punches the inner circle and the outer circle on the sheet.
  • the shape of the punched circle formed on the sheet immediately after being punched is the shape indicated by the inner blade 15 and the outer blade 16 on the development view in which the roll surface 11 is developed on a flat surface, assuming that there is no slippage of the sheet. Become.
  • FIG. 1 (12) is a plan view of the roll surface 11 developed in the upper perspective view of (11).
  • the inner blade 15 and the outer blade 16 are arranged concentrically, and both of the blade edges have an elliptical shape that is long in the X-axis direction.
  • the sheet conveying direction is the X axis
  • the roll axial direction is the y axis, which corresponds to the X axis and y axis of the above formula I.
  • the sheet is punched into such an elliptical shape while being stretched in the conveyance direction under the tension under conveyance, and for this reason, the disk-shaped laminate formed thereby has a subsequent tension. In the state of being removed and contracted, the disk (and its inner hole) is very close to a perfect circle.
  • FIG. 1 For comparison with (1 2) in FIG. 1, a development view in which the roll surface of a rotary die cutter provided with a punching blade of a circular edge instead of an elliptical shape on the roll surface is developed on a plane is shown.
  • An example is shown in FIG.
  • the inner blade 55 and the outer blade 56 are arranged concentrically, and both of them have a perfect circle shape.
  • the sheet is punched in such a perfect circle shape while being stretched in the conveyance direction under the tension under conveyance. For this reason, the disk-shaped laminate formed by this is subsequently subjected to tension. In the state of being removed and contracted, it becomes an elliptical disk (and its inner hole) that is long in the y-axis direction, and a highly accurate perfect circle cannot be achieved.
  • FIG. 1 is a cross-sectional view in a section perpendicular to the axis of the roll, including BB ', in the upper perspective view of (11).
  • the oval-shaped punching blades (inner blade 15a, inner blade 15b, outer blade 16a, outer blade 16b) are all shown as needle-like protrusions perpendicular to the roll surface 11 in (1-3).
  • the inner blades 15a and 15b perform so-called full force punching on the photocurable transfer material sheet, and the outer blades 16a and 16b perform so-called half-cut punching (described later). Therefore, the height of the outer blade of the punching blade is set lower than the height of the inner blade by an amount corresponding to the thickness of the long release sheet layer left without being punched.
  • FIG. 2 is a cross-sectional view illustrating a flow in which the above-described rotary die cutter is used for a sheet under conveyance.
  • the die roll 20 has an axial direction as shown in Fig. 1 (1-3).
  • the roll surface 21 is provided with a punching blade (an inner blade 25a, an inner blade 25b, an outer blade 26a, and an outer blade 26b) protruding from the roll surface 21.
  • the sheet 29 conveyed in the direction of the arrow is pressed against the surface of the die roll 20 by the anvil roll 22.
  • the anvil-up roll 23 suppresses slippage between the anvil roll 22 and the sheet under conveyance by pressing the sheet 29 against the anvil roll 22.
  • the die roll 20 synchronizes with the anvil roll 22 and punches out the sheet conveyed while receiving tension in the conveying direction with a punching blade.
  • the sheet to be transported should be designed to avoid stretching as much as possible in the vicinity of contact with the die roll, and it is desirable to design U. It is unavoidable to apply tension in actual transport. . Therefore, in the present invention, punching with respect to an elongated sheet is supported by punching with an elliptical punching blade (ellipse-shaped cutting edge punching blade).
  • the speed of conveyance of the photocurable transfer material sheet is further adjusted so that the ellipse punched by the punching blade becomes a perfect circle without being subjected to the tension force of conveyance. It is preferable to increase or decrease.
  • the punching blade rotates in synchronization with the transport roll, while the sheet is transported while slipping between the transport roll.
  • the planned position where the punching blade comes into contact with the sheet may also shift. This seems to be another factor in producing a disc that does not meet the expected accuracy of a perfect circle when using a round-shaped rotary die-cut punching blade.
  • the above-mentioned optimization by adjusting the conveyance speed is considered to be useful for improving the accuracy of the complete circle taking these factors into account.
  • FIG. 3 is an explanatory diagram illustrating an example of a flow of manufacturing a photocurable transfer disk sheet from a photocurable transfer material sheet by the manufacturing method of the present invention.
  • a long release sheet 31, a photocurable transfer layer 32, and a long release sheet 33 are laminated by a process (not shown) to form a photocurable transfer material sheet ((3-1) in Fig. 3).
  • a sheet with the inner circle 38 and the outer circle 39 punched concentrically ((3-2) in Fig. 3) is manufactured by punching with a sheet (step D).
  • the inner circle 38 penetrates through the three layers of the long release sheet 31, the photo-curable transfer layer 32, and the long release sheet 33 (full cut, full removal).
  • the outer circle 39 penetrates up to two layers of the photocurable transfer layer 32 and the long release sheet 33 (half cut, half cut).
  • the three-layered cylinder inside the inner circle is removed as a scum part, and the peripheral part of the outer circle is also removed as a scum part (Step E).
  • the cylinder inside the inner circle can be removed at the same time as punching.
  • a laminated body 35 having an inner hole 36 and comprising a disc-like photocuring layer 32d and a disc-like release sheet 33d is formed on the long release sheet 31 ((3 in FIG. 3).
  • Fig. 3 (3-4) shows a cross-sectional view of the sheet shown in Fig. 3 (3-3) cut along the cross section including CC.
  • a laminate 35 of a disc-like photocurable transfer layer 32d and a disc-like release sheet 33d is laminated to form a photocurable transfer disc sheet 30.
  • An inner hole 36 is provided through the laminate 35 and the long release sheet 31.
  • the present invention includes the following steps:
  • a method for producing a photocurable transfer disk sheet comprising:
  • the shape of the cutting edge of the inner circle punching blade in a plan view and the shape of the cutting edge of the outer circle punching blade in a plan view are both in the plane development view of the surface of the roll.
  • FIG. 4 is a view for explaining the elliptical shape of the cutting edge of the punching blade shown on the development view of the roll surface.
  • the elliptical shape is the following formula I:
  • the conveyance direction of the photocurable transfer material sheet is the X axis
  • the roll axial direction is the y axis
  • r is the minor axis radius of the ellipse
  • p Xr is the major axis radius of the ellipse
  • the shape is represented by The P is preferably in the range of 1.1 ⁇ > 1.
  • the present invention can be suitably implemented.
  • the sheet can be forcibly stretched without damaging the disk stack.
  • the punching blade forces of both the inner blade (inner circle punching blade) and the outer blade (outer circle punching blade) as described above are provided on the roll surface. Yes. That is, the elliptical shape of the cutting edge is
  • the inner blade and the elliptical shape of the cutting edge are
  • p and p have a relationship of p ⁇ p that can be changed independently a b a
  • the inner and outer blades are punched as a result of the oval shape.
  • the inner and outer circles of the concentric circles can be made closer to a perfect circle.
  • the p of such a relationship is in the range of the p force 1.04 ⁇ p> 1.00, and
  • the p-force is preferably in the range of 1.10 ⁇ p ⁇ 1.04.
  • the punching blades protrude from the roll surface vertically, preferably over the entire circumference of the elliptical shape, provided that the roll surface force also protrudes.
  • the height of the punching blade is preferably changed according to the thickness of the punched sheet. In the preferred embodiment described above, since the outer blade of the punching blade is half-cut and the inner blade is full-cut, the height of the outer blade is the thickness of the long release sheet layer that remains without being punched. The height is set lower than the height of the inner cutter.
  • the punching blade can be of a general material used as a rotary die cutter, and for example, steel, steel alloy, particularly stainless steel, and ceramic are preferable.
  • the material of the disk-shaped photocurable transfer layer can be accurately transferred by pressing the uneven surface of the stamper in the production of the optical information recording medium.
  • Any material that can be made into a layer that can be cured by irradiation (radiation irradiation including visible light irradiation and ultraviolet irradiation) can be used.
  • it is a layer that is easily deformed by pressurization, and the transfer layer is formed by slightly crosslinking the reactive polymer. Any material can be suitably used as long as it can form a layer that has a suppressed thickness variation.
  • the disk-shaped photocurable transfer layer material after curing has a light transmittance in the wavelength region of 380 to 420 nm of 70 so that it can be easily read by a reproduction laser in order to increase the density of information. % Or more is preferable.
  • the light transmittance in the wavelength region of 380 to 420 nm is preferably 80% or more. Therefore, the optical information recording medium of the present invention produced using this photocurable transfer material sheet can be advantageously used in a method for reproducing a pit signal using a laser having a wavelength of 380 to 420 nm.
  • Examples of such a material include a photocurable composition.
  • a photocurable composition generally includes a polymerizable compound having a photopolymerizable functional group (monomer and Z or oligomer). ), A photopolymerization initiator, an additive and the like.
  • a photopolymerizable functional group a polymerizable compound having an ethylenic double bond (preferably an atalyloyl group or a methacryloyl group) is preferable.
  • Examples of the polymerizable monomer having a photopolymerizable functional group include alkyl acrylates (eg, methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethyl hexyl acrylate) and Z or Examples thereof include alkyl metatalates (eg, methyl metatalylate, ethyl methacrylate, butyl metatalylate, 2-ethylhexyl methacrylate).
  • alkyl acrylates eg, methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethyl hexyl acrylate
  • alkyl metatalates eg, methyl metatalylate, ethyl methacrylate, butyl metatalylate, 2-ethylhexyl methacrylate.
  • the polymerizable monomer preferably contains 1 to 50 mol%, particularly 5 to 30 mol% of a photopolymerizable functional group.
  • a photopolymerizable functional group an alitaroyl group, a methacryloyl group, and a vinyl group are preferable, and an attaloyl group and a methacryloyl group are particularly preferable.
  • the above-mentioned photocurable composition preferably further contains a reactive diluent having a photopolymerizable functional group.
  • a reactive diluent for example, 2-hydroxyethyl (meth) atalyl
  • One kind or a mixture of two or more kinds can be used.
  • photopolymerization initiator any known photopolymerization initiator can be used. Those having good storage stability after blending are desirable. Examples of such photopolymerization initiators include benzoin series such as acetophenone series, benzyl dimethyl ketal, benzophenone series, isopropyl thixanthone, thixanthone series such as 2-4 jetylthioxanthone, and other special ones. Methyl phenyl oxylate can be used. Particularly preferred are 2-hydroxy-2-methyl-1-phenolpropane-1-one, 1-hydroxycyclohexyl phenol ketone, 2-methyl-1-one (4 (methylthio) phenol) -2-morpholinopropane.
  • photopolymerization initiators may contain one or more known photopolymerization accelerators such as benzoic acid type or tertiary amine type such as 4-dimethylaminobenzoic acid in any proportion as necessary. Can be used as a mixture. In addition, it can be used alone or as a mixture of two or more photopolymerization initiators. In general, the photocurable initiator preferably contains 0.1 to 20% by mass, particularly 1 to 10% by mass of a photopolymerization initiator.
  • acetophenone polymerization initiator for example, 4-phenoxydichloroacetophenone, 4-tert-butyl-dichloroacetophenone, 4-tert-butyl-chloroacetophenone, diethoxya Cetofenone, 2-hydroxy-1-2-methyl 1-phenolpropane 1-one, 1- (4-isopropylphenol) 2 Hydroxy-2-methylpropane 1-one, 1- (4-dodecylphenol) ) 2-Hydroxy-1-2-Methylpropan-1-one, 4- (2-Hydroxyethoxy) 1-Phenol (2-Hydroxy1-2propyl) Ketone, 1-Hydroxycyclohexyl phenyl ketone, 2-Methyl 1- (4 — (Methylthio) phenol) 2-morpholinopropane 1-1, and other benzophenone polymerization initiators include benzophenone, benzoy
  • acetophenone polymerization initiator in particular, 2-hydroxy-1,2-methyl 1-phen- Preferred are 1-propane, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1 (4 (methylthio) phenol) 2 morpholinopropane 1.
  • benzophenone-based polymerization initiator benzophenone, benzoylbenzoic acid, and methyl benzoylbenzoate are preferable.
  • Tertiary amine amine photopolymerization accelerators include triethanolamine, methyljetanolamine, triisopropanolamine, 4,4'-dimethylaminobenzenphenone, 4,4, -jetylaminobenzenphenone, 2 Examples include dimethylaminobenzoyl ethyl, 4 dimethylaminobenzoic acid ethyl, 4 dimethylaminobenzoic acid (n-butoxy) ethyl, 4-dimethylaminobenzoic acid isamyl, 4-dimethylaminobenzoic acid 2-ethylhexyl and the like.
  • photopolymerization accelerator examples include 4-dimethylaminobenzoyl ethyl, 4 dimethylaminobenzoate (n-butoxy) ethyl, isamyl dimethyl 4-dimethylaminobenzoate, and 2-ethylhexyl 4-dimethylaminobenzoate.
  • the mass ratio of the photopolymerizable compound to the photopolymerization initiator is generally preferably in the range of 40 to: LOO: 0.1 to 10, particularly 60 to: LOO: 1 to 10.
  • the photocurable composition is designed so that the photocurable transfer layer satisfies a glass transition temperature of 20 ° C or lower and a transmittance of 70% or higher.
  • a glass transition temperature 20 ° C. or lower
  • the glass transition temperature is in the range of 15 ° C to -50 ° C, in particular 15 ° C to -10 ° C, so that the followability is excellent. If the glass transition temperature is too high, a high pressure and a high pressure are required at the time of bonding, leading to a decrease in workability.
  • thermoplastic rosin in addition to the compound having a photopolymerizable functional group and the photopolymerization initiator, it is preferable to add a thermoplastic rosin and other additives as described below, if desired.
  • a silane coupling agent (adhesion promoter) can be added.
  • the silane coupling agent include butyltriethoxysilane, butyltris (methoxyethoxy) silane, ⁇ -methacryloxypropyltrimethoxysilane, butyltrioxysilane, ⁇ -glycidoxypropyltrimethoxysilane, and ⁇ -glycid.
  • ⁇ -aminopropyltriethoxysilane N-j8 (aminoethyl) ⁇ -aminopropyl trimethoxysilane, and the like. These can be used alone or in combination of two or more.
  • the amount of these silane coupling agents added is usually 0.01 to 5 parts by mass per 100 parts by mass of the reactive polymer.
  • Epoxy group-containing compounds include: triglycidyl tris (2-hydroxyethyl) isocyanurate; neopentyl glycol diglycidyl ether; 1,6 hexanediglycidyl ether; acrylic glycidyl ether; 2-ethylhexyl glycidyl ether Phenyl glycidyl ether; ⁇ -tert-butyl glycidyl ether; adipic acid diglycidyl ester; o phthalic acid diglycidyl ester; glycidyl metatalylate; butyl daricidyl ether and the like.
  • the same effect can be obtained by adding an oligomer having an epoxy group with a molecular weight of several hundred to several thousand and a polymer with a weight average molecular weight of several thousand or several hundred thousand.
  • the addition amount of these epoxy group-containing compounds is 0.1 to 20 parts by mass with respect to 100 parts by mass of the reactive polymer, and at least one of the epoxy group-containing compounds alone or They can be mixed and added.
  • hydrocarbon resin can be added for the purpose of improving processability such as processability and bonding.
  • the added hydrocarbon resin may be either natural or synthetic resin.
  • natural rosin, rosin, rosin derivatives, and terbene-based rosin are preferably used.
  • rosin gum-based resin, tall oil-based resin, and wood-based resin can be used.
  • rosin derivative rosin obtained by hydrogenation, heterogeneity, polymerization, esterification, or metal salt can be used.
  • terpene resin terpene phenol resin such as ⁇ -vinene and 13 pinene can be used.
  • dammar, corbal and shellac can be used as other natural fats and oils.
  • petroleum resin, phenol resin, and xylene resin are preferably used in the synthetic resin system.
  • petroleum-based resins aliphatic petroleum resins, aromatic petroleum resins, alicyclic petroleum resins, copolymerized petroleum resins, hydrogenated petroleum resins, pure monomer-based petroleum resins Fat and coumarone indene rosin can be used.
  • phenolic resin alkylphenolic resin and modified phenolic resin can be used.
  • xylene-based resin xylene resin and modified xylene resin can be used.
  • Acrylic resin may also be added.
  • alkyl acrylate eg, methyl acrylate, ethyl acrylate, butyl acrylate
  • Z or alkyl methacrylate eg, methyl methacrylate, ethyl methacrylate, butyl methacrylate
  • PMMA polymethylmetatalate
  • the addition amount of the polymer such as the hydrocarbon resin is appropriately selected, but is preferably 1 to 20 parts by mass, more preferably 5 to 15 parts by mass with respect to 100 parts by mass of the reactive polymer.
  • the photocurable composition may contain a small amount of an ultraviolet absorber, an anti-aging agent, a dye, a processing aid and the like. In some cases, it may contain a small amount of additives such as silica gel, calcium carbonate, and fine particles of silicon copolymer.
  • the photopolymerizable compound contained in the photocurable composition has a functional group having active hydrogen, and at the same time, has an active hydrogen in the photocurable composition. It is preferable to include a compound having at least two groups reactive with the functional group.
  • a photocurable composition is used as a material, during processing or storage of a sheet having a transfer layer, they react with each other and slightly crosslink to increase the viscosity of the transfer layer. Let Thereby, the seepage of the transfer layer and the variation in the layer thickness can be largely suppressed.
  • Examples of the compound having a functional group having active hydrogen and a photopolymerizable functional group include alkyl acrylate (eg, methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethyl hexyl acrylate). ) And Z or alkyl methacrylates (eg, methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate) or homopolymers (ie acrylic resins) And having a photopolymerizable functional group and a functional group having active hydrogen in the main chain or side chain.
  • alkyl acrylate eg, methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethyl hexyl acrylate
  • Z or alkyl methacrylates eg, methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-e
  • reactive compounds are More than one kind of (meth) acrylate and (meth) acrylate (eg, 2-hydroxyethyl (meth) acrylate) having a functional group such as a hydroxyl group are copolymerized. It can be obtained by reacting with a functional group of a polymer and a compound having a photopolymerizable group such as anatoalkyl (meth) acrylate. At that time, the reactive polymer having a hydroxyl group and a photopolymerizable functional group as a functional group having an active hydrogen can be obtained by adjusting the amount of isocyanatoalkyl (meth) acrylate so that the hydroxyl group remains. can get.
  • the functional group having active hydrogen can be obtained by using (meth) acrylate (eg, 2-aminoethyl (meth) acrylate) having an amino group instead of a hydroxyl group as described above.
  • a photopolymerizable functional group-containing reactive polymer having an amino group can be obtained.
  • a photopolymerizable functional group-containing reactive polymer having a carboxyl group or the like as a functional group having active hydrogen can also be obtained.
  • the ability to form a photopolymerizable group via a urethane bond using isocyanatoalkyl (meth) acrylate, etc. forms other methods, for example, an acrylic resin containing a carboxylic acid
  • the photopolymerizable group can also be formed by reacting this carboxylic acid with (meth) acrylate (eg, glycidyl (meth) acrylate) having an epoxy group.
  • An acrylic resin having the photopolymerizable functional group via a urethane bond is particularly preferable.
  • Examples of the compound having at least two groups reactive with the functional group having active hydrogen include isocyanate compounds, epoxy compounds, and the like.
  • the isocyanate compound is preferred because it is easy to use.
  • the at least difunctional isocyanate compounds include tolylene diisocyanate (TDI), isophorone diisocyanate, xylylene diisocyanate, diphenylenomethane 4, 4 diisocyanate, dicyclopentaninoresiisoiso.
  • TDI tolylene diisocyanate
  • isophorone diisocyanate xylylene diisocyanate
  • diphenylenomethane 4 diisocyanate dicyclopentaninoresiisoiso.
  • Examples include cyanate, hexamethylene diisocyanate, 2,4,4'-trimethylhexamethylene diisocyanate, and 2,2 ', 4 trimethylhexamethylene diisocyanate.
  • Trifunctional or higher isocyanate isocyanate compounds such as trimethylolpropane TDI adducts can also be used. Of these, the hexamethylene diisocyanate adduct of trimethylolpropane
  • Compound having at least two groups reactive with the functional group having active hydrogen described above Is preferably contained in the photocurable composition in the range of 0.2 to 4% by mass, particularly 0.2 to 2% by mass.
  • the substrate can also maintain good transferability of the stamper irregularities.
  • the reaction between the above compound and the reactive polymer proceeds gradually after the transfer layer is formed, and reacts at room temperature (generally 25 ° C) for 24 hours. It is considered that the reaction proceeds after the coating solution for forming the transfer layer is prepared and before it is applied. After forming the transfer layer, it is preferable to cure to a certain extent before winding it on the sheet roll. Therefore, if necessary, heat is applied during the formation of the transfer layer or after winding in the sheet roll state. The reaction may be promoted.
  • the photocurable transfer layer is prepared by uniformly mixing a photocurable material composition as described above together with additives as necessary, kneading with an extruder, a roll, etc., and then calendering, roll, T-die.
  • the film can be formed into a predetermined shape by a film forming method such as extrusion or inflation and stacked on a long release sheet. If desired, a support can be used. In this case, a film is formed on the support. In a preferred embodiment, a long release sheet is used as a support, and the film is laminated directly on the long release sheet.
  • the film forming method of the photocurable adhesive of the present invention is particularly preferable in that each constituent component is uniformly mixed and dissolved in a good solvent, and this solution is applied to a separator precisely coated with silicone or fluorine resin.
  • coating is performed on a support (long stripping sheet) by a coating method, a gravure roll method, a Myer bar method, a lip die coating method, or the like, and a solvent is dried to form a film.
  • the thickness of the photocurable transfer layer is generally in the range of 1 to 1200 ⁇ m, preferably in the range of 5 to 500 ⁇ m. In particular, the range of 5 to 300 ⁇ m (preferably 150 ⁇ m or less) is preferable. If it is thinner than 1 m, the sealing performance is poor, and the unevenness of the transparent resin substrate may not be filled. On the other hand, if the thickness is greater than 1 000 m, the thickness of the recording medium increases, which may cause problems with storage and assembly of the recording medium, and may further affect light transmission. In order to make the optical information recording medium multi-layered, it is advantageous to make the thickness small within the above-mentioned range.
  • such a disc-like photocurable transfer layer can be provided in the form of a film in which the film thickness accuracy is precisely controlled, it can be easily and accurately bonded to the substrate and the stamper. It is possible. In addition, this bonding can be cured at room temperature for 1 to several tens of seconds with light after being temporarily pressure-bonded at 20 to 100 ° C by a simple method such as a pressure roll or simple press. Because of the self-adhesive force unique to this adhesive, it is difficult for the laminate to delaminate, so that it can be handled freely until photocuring.
  • the disk-shaped photocurable transfer layer When curing a disk-like photocurable transfer layer, many light sources that emit light in the ultraviolet to visible region can be used as the light source, for example, ultra-high pressure, high-pressure, low-pressure mercury lamp, chemical lamp, xenon lamp, halogen lamp. , Mercury halogen lamps, carbon arc lamps, incandescent lamps, laser lights and the like. Irradiation time is not generally determined by the type of lamp and the intensity of the light source, but it is several seconds to several minutes.
  • the disk-shaped photocurable transfer layer may be preheated to 30 to 80 ° C. and irradiated with ultraviolet rays.
  • a transparent organic resin having a glass transition temperature of 50 ° C or more is preferable.
  • examples of such a material include polyesters such as polyethylene terephthalate, polycyclohexylene terephthalate, and polyethylene naphthalate.
  • Polyamide resin nylon 46, modified nylon 6T, nylon MXD6, polyamide resin such as polyphthalamide, polyphenylene sulfide, ketone resin such as polythioether sulfone, sulfone such as polysulfone, polyether sulfone Transparent based mainly on organic resin such as polyether-tolyl, polyarylate, polyether imide, polyamide imide, polycarbonate, polymethyl methacrylate, triacetyl cellulose, polystyrene, polybutyl chloride Use a resin substrate Can do.
  • polycarbonate, polymethylmethaacrylate, polybuluchloride, polystyrene, and polyethylene terephthalate can be suitably used.
  • the thickness is preferably 10 to 200 ⁇ m, particularly 20 to LOO ⁇ m.
  • the photocurable transfer disk sheet of the present invention can be manufactured by the above-described manufacturing method.
  • the mixture having the above formulation was heated to 70 ° C. with gentle stirring to initiate polymerization, stirred at this temperature for 8 hours, and polymer 1 having a hydroxyl group having a hydroxyl group in the side chain (acrylic acid). Fat) was obtained. The solid content was adjusted to 36% by mass (polymer solution 1).
  • the obtained polymer 1 had a Tg of 100 ° C and a weight average molecular weight of 110000.
  • Polymer solution 1 100 parts by mass
  • KS—HDDA hexanediol ditalate
  • Irgacure 651 (Ciba Geigy Co., Ltd.) 1 part by mass
  • the mixture having the above composition was uniformly dissolved and kneaded to obtain a photopolymerizable composition.
  • a photocurable transfer layer having a dry thickness of 20 people and 2 m was formed on the surface of the release film prepared as the first long release sheet (width 200mm, length 300m, thickness 50m; product name No. 23, manufactured by Fujimori Kogyo Co., Ltd.) A photocurable transfer layer having a dry thickness of 20 people and 2 m was formed.
  • the photocurable transfer material sheet produced as described above was subjected to disk-like punching by rotary die cutting using a die roll machine SRD-W350 (manufactured by Soltec Industrial Co., Ltd.).
  • the height of the outer blade was 38 / zm lower than the height of the inner blade.
  • Punching was performed so that the centers of the concentric circles were located at the center in the width direction of the photocurable transfer material sheet at intervals of 125 mm in the longitudinal direction.
  • the line speed was finely adjusted so that a shape close to a perfect circle was obtained by performing trial punching several times while changing the speed.
  • the inner circle is punched in such a way that all three layers of the first long release sheet, the photocurable transfer layer and the second long release sheet are punched out (full cut, full punch).
  • the first long release sheet and the photocurable transfer layer were punched out, and the second long release sheet corresponding to the last one layer was left without being punched (nof cut, partial cut) .
  • the inner part of the fully cut inner circle was completely removed as a residue part, and the peripheral part of the half cut outer circle was also removed as a residue part.
  • a laminate of the disc-like photocurable transfer layer and the disc-like release sheet provided thereon is provided in the longitudinal direction in the region of the central portion in the width direction on the surface of the long release sheet.
  • the transferable disc sheet was prepared by rotary die cutting using an elliptical blade.
  • a photocurable transfer material sheet was produced in the same manner as in Example 1.
  • the produced photocurable transfer material sheet was subjected to a disk-like punching process using a Thomson blade (manufactured by Tsukaya Blade Co., Ltd.).
  • the punching process was performed by cutting the same photocurable transfer material sheet as in Example 1 to prepare a single wafer sheet (width 200 mm, length 600 mm).
  • the inner and outer circles are concentric with a circular inner blade (diameter 22 mm) and a circular outer blade (diameter 120 mm). This was done by punching into The height of the outer blade was 38 m lower than the height of the inner blade.
  • a photocurable transfer material sheet was produced in the same manner as in Example 1.
  • the produced photocurable transfer material sheet was subjected to disk-like punching by rotary die cutting in the same manner as in Example 1. went. However, unlike Example 1, circular inner blades (diameter 22 mm) and outer blades (diameter 120 mm) were used instead of elliptical shapes. Also, fine adjustment of the line speed by trial punching at different speeds was not performed. In this way, in the region of the central portion in the width direction of the surface of the long release sheet, a photocuring formed by laminating the disc-like photocurable transfer layer and the disc-like release sheet provided thereon in the longitudinal direction. The transferable disc sheet was prepared by rotary die cutting using a circular blade.
  • the disk on the photocurable transfer disk sheet of Example 1 has the laminated structure maintained in its cross section, the full cut and the half cut are performed as desired, and a plane that is extremely close to a perfect circle. It had a shape.
  • the disk of Comparative Example 1 obtained a state close to a perfect circle as a planar shape, but the cross-sectional laminate structure was crushed during cutting, and a photocurable material protruded from the cut surface. In some cases, full cuts and half cuts that did not have the same punching depth were not formed as desired.
  • the disk of Comparative Example 2 has a cross-sectional laminated structure, and full cut and half cut were performed as desired, but the planar shape is close to an ellipse far from a perfect circle.
  • punching with a Thomson blade has a problem in holding the laminated body of the cross section and punching height accuracy
  • rotary die cutting with a circular punching blade has a problem in roundness accuracy. In the method using the rotary die cutting with the punching blade, it was proved that excellent punching was possible for all of them.
  • the photocurable transfer disc sheet obtained by the production method of the present invention is provided with a disc-shaped laminate having high thickness accuracy, uniformity, and roundness accuracy required for optical information recording media such as DVDs. Therefore, the manufacturing method of the present invention is particularly suitable for manufacturing a high-precision optical information recording medium.

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  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Abstract

Le procédé selon l'invention permet de produire une feuille de disque de transport durcissant par effet photochimique. Ce procédé est adapté pour le traitement continu d'une longue feuille de matériau de transfert durcissant par effet photochimique en cours de transport et permet d'obtenir une précision de profondeur de perforation lors du travail de perforation, ainsi que d'améliorer davantage la précision de circularité de la forme du disque tout en évitant un effondrement de la section transversale de perforation. Le procédé de production d'une feuille de disque de transport durcissant par effet photochimique consiste à presser un rouleau tournant de façon synchrone avec le transport et ayant une lame de perforation faisant saillie depuis la surface contre la surface d'une feuille de matériau de transfert durcissant par effet photochimique en cours de transport, perforant de la sorte la feuille de matériau de transfert durcissant par effet photochimique de manière à obtenir la forme d'un disque. Le procédé de production est caractérisé en ce que la pointe de la lame de perforation a une vue en plan elliptique allongée dans la direction de transport de la feuille de matériau de transfert durcissant par effet photochimique sur le développement de plan de la surface du rouleau.
PCT/JP2006/317204 2006-08-31 2006-08-31 Procédé de production d'une feuille de disque de transport durcissant par effet photochimique adapté pour la production de support d'enregistrement d'informations optique et feuille de disque de transport durcissant par effet photochimique produite au moyen de ce procédé WO2008026277A1 (fr)

Priority Applications (1)

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PCT/JP2006/317204 WO2008026277A1 (fr) 2006-08-31 2006-08-31 Procédé de production d'une feuille de disque de transport durcissant par effet photochimique adapté pour la production de support d'enregistrement d'informations optique et feuille de disque de transport durcissant par effet photochimique produite au moyen de ce procédé

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PCT/JP2006/317204 WO2008026277A1 (fr) 2006-08-31 2006-08-31 Procédé de production d'une feuille de disque de transport durcissant par effet photochimique adapté pour la production de support d'enregistrement d'informations optique et feuille de disque de transport durcissant par effet photochimique produite au moyen de ce procédé

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11345436A (ja) * 1998-06-01 1999-12-14 Sony Corp 光学記録媒体の製造方法と光学記録媒体の製造装置
JPH11347999A (ja) * 1998-06-06 1999-12-21 Sumitomo Jukikai Chutan Kk ダイカット装置
WO2003032305A1 (fr) * 2001-10-02 2003-04-17 Bridgestone Corporation Feuille de transfert photo-durcissable, substrat d'enregistrement d'informations optique lamine, procede de fabrication correspondant, et support d'enregistrement d'informations optique
JP2004079052A (ja) * 2002-08-14 2004-03-11 Fuji Photo Film Co Ltd 積層シート材の打抜き方法及び光ディスクの製造方法
JP2005531098A (ja) * 2002-06-26 2005-10-13 エナージー　コンバーション　デバイセス　インコーポレイテッド 重合体基材上に微細構造を形成する方法及び装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11345436A (ja) * 1998-06-01 1999-12-14 Sony Corp 光学記録媒体の製造方法と光学記録媒体の製造装置
JPH11347999A (ja) * 1998-06-06 1999-12-21 Sumitomo Jukikai Chutan Kk ダイカット装置
WO2003032305A1 (fr) * 2001-10-02 2003-04-17 Bridgestone Corporation Feuille de transfert photo-durcissable, substrat d'enregistrement d'informations optique lamine, procede de fabrication correspondant, et support d'enregistrement d'informations optique
JP2005531098A (ja) * 2002-06-26 2005-10-13 エナージー　コンバーション　デバイセス　インコーポレイテッド 重合体基材上に微細構造を形成する方法及び装置
JP2004079052A (ja) * 2002-08-14 2004-03-11 Fuji Photo Film Co Ltd 積層シート材の打抜き方法及び光ディスクの製造方法

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