JP2007087443A - Storing case for photosensitive recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photosensitive recording medium storing case having an excellent storing performance and capable of preventing the performance of a photosensitive recording medium from being deteriorated due to humidity by storing and keeping the photosensitive recording medium in the storing case with low humidity. <P>SOLUTION: In the photosensitive recording medium storing case 10, moisture absorbing layers 8 for absorbing moisture are formed on inwall surfaces 1d, 2d of a storing case body 1A and a cover body 2A, the photosensitive recording medium 4 or a photosensitive recording medium cartridge 30 in which the photosensitive recording medium 4 is rotatably stored can be stored and kept in a disk storing part 3 of the photosensitive recording medium storing case 10 with low humidity and the characteristic deterioration of the photosensitive recording medium 4 due to humidity can be prevented. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a photosensitive recording medium container for storing and storing a photosensitive recording medium cartridge that rotatably stores a photosensitive recording medium such as a hologram recording medium.

  A hologram recording medium for recording data by hologram has been invented (see, for example, Patent Document 1). This hologram recording medium is a photosensitive recording medium in which a hologram recording layer made of a photosensitive material is layered on a disk-shaped support, and has been widely used by recording data in multiple layers as laser light interference fringes. Thus, a larger data recording capacity can be obtained than a DVD that is a recording medium. This hologram recording medium is handled by being housed in a cartridge having a light-shielding function and a dust-proof function because the performance of the hologram recording layer is adversely affected by exposure of the hologram recording layer or adhesion of dust (for example, Patent Document 2). reference).

  In the invention described in Patent Document 1, a hologram recording medium is accommodated in a cartridge similar to a DVD-RAM cartridge. This cartridge is formed of a material having a low transmittance of light in a wavelength region that affects the hologram recording layer. Although the detailed configuration of the cartridge is not described in Patent Document 1, it is considered that the cartridge has the same configuration as the cartridge described in Patent Document 2.

  In the invention described in Patent Document 2, a cartridge is formed of a material that shields the sensitive color of the hologram recording layer, and a sponge-like light shielding material is attached to the joint of the movable part that exposes the hologram recording medium to the outside. Yes. Further, a cartridge body is described that includes a cartridge body that accommodates a recording medium in a rotatable state, an opening that is provided in the cartridge body and exposes a part of the recording medium to the outside, and a shutter that opens and closes the opening. ing.

JP 2004-029476 A JP 2003-317422 A

  Since the hologram recording medium has photosensitivity, it cannot be stored alone as it is naked, but is stored and stored in the cartridge in a state where it is shielded from light. If the cartridge containing the hologram recording medium is not properly shielded from light and dust between the cartridge main body itself and the cartridge main body and the shutter, light and dust will enter the cartridge and adversely affect the hologram recording medium. I will give it. In addition, a photopolymer, which is a photosensitive material constituting the hologram recording layer, has a property of reacting with moisture when it absorbs moisture, which adversely affects the characteristics of the hologram recording medium. However, Patent Document 1 does not describe a light shielding structure and a dustproof structure, and does not consider humidity.

  The cartridge described in Patent Document 2 shields light between a cartridge body composed of an upper half and a lower half and a shutter with a sponge-like light shielding material. Further, there is described a cartridge main body composed of an upper half body and a lower half body provided with a shutter mechanism. The cartridge described in Patent Document 2 considers light shielding by a light shielding material or a shutter mechanism, but has no description on moisture proofing. Therefore, if the cartridge is stored in a place with high humidity for a long time, the humidity may adversely affect the performance of the hologram recording medium contained in the cartridge main body.

  Also, in business establishments that use a large amount of hologram recording media, it is desirable to stack the hologram recording media in a storage case etc. in a bare state (that is, not accommodated in the cartridge body) and store and store them in a lump. In this case as well, the storage case is required to have a function of keeping the inside of the storage case in a low humidity state as well as light shielding and dustproof. However, conventionally, there has been no storage case that can accommodate a plurality of photosensitive recording media in a stacked manner.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to store and store a photosensitive recording medium in a low-humidity container so as to prevent performance deterioration of the photosensitive recording medium due to humidity. An object of the present invention is to provide a photosensitive recording medium container that is excellent in storability.

The above object of the present invention is achieved by the following photosensitive recording medium container.
(1) A photosensitive recording medium housing comprising a disk housing portion capable of housing a photosensitive recording medium or a photosensitive recording medium cartridge in which the photosensitive recording medium is rotatably housed, wherein the disk housing The photosensitive recording medium container, wherein the portion is provided with a moisture absorbing member that absorbs moisture.

  According to the photosensitive recording medium container configured as described above, the inside of the photosensitive recording medium container is maintained in a low humidity state because it has a moisture absorbing member that absorbs moisture in the disk accommodating part. Is done. Therefore, moisture absorption of the photosensitive recording medium accommodated in the photosensitive recording medium container is prevented, and there is no performance deterioration due to humidity, and the photosensitive recording medium can be stably stored for a long period of time.

(2) The photosensitive recording medium container according to (1), wherein the hygroscopic member is a hygroscopic layer formed on an inner wall surface of the disc container.

  According to the photosensitive recording medium container having the above-described structure, the moisture absorbing layer is formed on the inner wall surface of the disk housing portion. Therefore, even if the photosensitive recording medium container is in a high humidity environment, the disk The inside of the housing is maintained in a low humidity state. Thereby, the performance deterioration of the photosensitive recording medium due to humidity can be prevented.

(3) The photosensitive recording medium container according to (1), wherein the hygroscopic member is a hygroscopic agent installed in the disk housing portion.

  According to the photosensitive recording medium container having the above-described configuration, the moisture absorbent is installed in the disc container, so that the moisture in the disk container is absorbed by the moisture absorbent and the inside of the disk container is maintained in a low humidity state. . Thereby, the performance deterioration of the photosensitive recording medium due to humidity can be prevented.

(4) The photosensitive recording medium container according to any one of (1) to (3), wherein the hygroscopic member contains at least one of magnesium sulfate, calcium chloride, silica gel, and zeolite. .

  According to the photosensitive recording medium container having the above structure, the moisture absorbing member contains at least one of magnesium sulfate, calcium chloride, silica gel, and zeolite, so that moisture in the disk container is efficiently absorbed. As a result, the inside of the disk housing portion is maintained in a low humidity state. In addition, a photosensitive recording medium container capable of maintaining the inside of the disk container in a low humidity state can be provided at low cost.

(5) The photosensitive recording medium container according to any one of (1) to (4), wherein the photosensitive recording medium is a hologram recording medium.

  According to the photosensitive recording medium container configured as described above, moisture absorption of the hologram recording medium can be efficiently prevented, and the hologram recording medium can be stored for a long period of time without degrading performance.

  According to the present invention, the photosensitive recording medium can be stored and stored in a container in a low-humidity state, and the performance of the photosensitive recording medium can be prevented from being deteriorated due to humidity. Can provide the body.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a perspective view of a photosensitive recording medium container according to a first embodiment of the present invention, FIG. 2 is a perspective view of the photosensitive recording medium, FIG. 3 is an enlarged longitudinal sectional view of a main part of the photosensitive recording medium, and FIG. Is a perspective view of a cartridge in which a photosensitive recording medium is rotatably accommodated, and FIG. 5 is a cross-sectional view taken along line VV in FIG.

  As shown in FIG. 1, a photosensitive recording medium container 10 is composed of a housing case 1 which is a container formed in a bottomed box shape and a lid portion 2 formed in a bottomed box shape. A photosensitive recording medium (hereinafter referred to as a recording disk) 4 such as a hologram recording medium is provided alone (in other words, in a naked state) in a disc housing portion 3 formed inside when the lid portion 2 is placed on 1. Alternatively, a cartridge 30 (see FIG. 4) that accommodates the recording disk 4 rotatably is accommodated. The recording disk 4 or the cartridge 30 accommodated in the disk accommodating unit 3 may be single or may be accommodated by laminating a plurality.

  As shown in FIG. 2, the recording disk 4 is a hologram recording disk formed in a disk shape with a hole 4a in the center, and has a diameter (D) of 120 mm, a thickness (t) of about 2 mm, and an inner diameter of the hole 4a ( d) 15 mm multilayer disc. As shown in FIG. 3, the recording disk 4 has a polycarbonate substrate layer L1 with a thickness of 1.2 mm, a reflective layer L2 with a thickness of 70 nm, a first gap layer L3 with a thickness of 100 μm, a selective reflective layer L4, a thickness. A second gap layer L5 having a thickness of 100 μm, a hologram recording layer L6 in which a photopolymer is formed with a thickness of 500 nm, and a cover layer L7 made of polycarbonate having a thickness of 0.6 mm are sequentially stacked.

  For example, data is multilayer-recorded on the hologram recording layer as laser light interference fringes by laser light in a wavelength range of green 532 nm to blue 405 nm. As shown in FIG. 4, the cartridge 30 that rotatably accommodates the recording disk 4 has a cartridge body 11 provided with a disk housing portion (not shown) for housing the recording disk 4, and the cartridge body 11. And a shutter 13 incorporated between the cartridge body 11 and the light shielding plate 12.

  On the upper and lower surfaces of the light shielding plate 12, substantially rectangular external openings 14 and 15 are formed. These external openings 14 and 15 are closed by the shutter 13 when the shutter 13 is in the closed position. When the shutter 13 moves toward the opening position in the direction of arrow A, the openings 18 and 19 of the same shape provided in the cartridge body 11 so as to face the external openings 14 and 15 are opened together with the external openings 14 and 15. The Thereby, the central part of the recording disk 4 accommodated in the disk accommodating part and the recording surface are exposed to the outside.

  As shown in FIGS. 1 and 5, the storage case 1 and the lid 2 are formed of moisture absorption formed on the storage case main body 1A and the lid main body 2A, and the inner wall surfaces 1d and 2d of the storage case main body 1A and the lid main body 2A. Layer 8. The housing case main body 1A and the lid main body 2A are formed by injection molding using a thermoplastic plastic to which a light shielding material is added so as to shield the sensitive color of the hologram recording layer. The housing case main body 1A is a substantially rectangular box-shaped member formed by a plate-shaped bottom plate 1a and a side wall 1b formed continuously on four sides. As shown in FIG. 5, a rectangular frame-shaped rib 1 c is further erected integrally from the open side edge of the side wall 1 b to form a step portion having a substantially L-shaped cross section.

  The lid 2 is a substantially rectangular box-shaped member formed corresponding to the housing case 1, and a rectangular frame-shaped side wall 2b is erected integrally from the entire edge of the plate-shaped top plate 2a. From the open side edge of the side wall 2b, a rectangular frame-shaped rib 2c is further erected integrally to form a step portion having an approximately L-shaped cross section corresponding to the rib 1c.

  As shown in FIG. 5, a moisture absorbing layer 8 including a moisture absorbing member is formed on the inner wall surfaces 1d and 2d of the housing case main body 1A and the lid main body 2A formed of thermoplastic plastic. The moisture absorption layer 8 is made of an adhesive in which a liquid organic material and a solid desiccant are mixed. The characteristics of the pressure-sensitive adhesive include room temperature solidification type, heat solidification type, ultraviolet light solidification type, and visible light solidification type. Examples of the liquid organic material include materials such as epoxy resin, polyurethane, bakelite, polyamide, acrylic resin, and polysiloxane. Solid desiccants include alkali metal oxides, alkaline earth oxides, metal halides, barium oxide, calcium oxide, calcium sulfate, calcium chloride, lithium oxide, calcium bromide, potassium carbonate, aluminum oxide, and oxidation. Examples include magnesium, copper sulfate, zinc chloride, zinc bromide, cobalt chloride, silica gel, zeolite, and molecular sieve.

  Further, a moisture-proof film 5 may be formed on the outer surface of the photosensitive recording medium container 10 to prevent moisture from entering the photosensitive recording medium container 10 from the outside. This prevents moisture entering the photosensitive recording medium container 10 and absorbs the moisture in the disk container 3 by the moisture absorbing layer 8, thereby more efficiently reducing the inside of the disk container 3 to a low humidity state. Can be maintained.

The moisture-proof film 5 is formed by vacuum film formation using SiO ₂ or SiO _x partially lacking oxygen, a fired layer of glass or moisture-resistant plastic, a coating or laminate of a fluorine-containing polymer, etc. It is formed on the outer surface of the main part 2A. The moisture-proof film 5 may be a moisture-proof and light-shielding film that is laminated with aluminum or the like and has a light-shielding property in addition to a moisture-proof function.

  As shown in FIG. 1, the photosensitive recording medium container 10 having such a structure is accommodated after a single recording disk 4 or a plurality of cartridges 30 are stacked in a housing case 1 or a plurality of cartridges 30 are stacked. The substantially L-shaped step portion of the case 1 and the substantially inverted L-shaped step portion of the lid portion 2 are fitted to each other, the housing case 1 is closed by the lid portion 2, and the recording disk 4 or the cartridge 30 is placed in the disk housing portion 3. Accommodate. At this time, the disc housing 3 may be filled with an inert gas such as nitrogen or argon, or dry air. Moreover, it is preferable to wind and seal the adhesive tape 6 around the joint between the housing case 1 and the lid 2.

  Thus, the recording disk 4 or the disk storage unit 3 in which the cartridge 30 is stored is in a low humidity state because the moisture in the recording disk 4 is absorbed by the hygroscopic layer 8, and the influence of the humidity on the recording disk 4 is prevented. Further, if the moisture-proof film 5 is formed on the outer surfaces of the housing case 1 and the lid portion 2, in addition to the above-described effect by the moisture-absorbing layer 8, it is possible to prevent external moisture from entering the disk housing portion 3, thereby further improving the effect. In particular, the low humidity state can be maintained. Furthermore, the disk housing 3 may be filled with an oxygen adsorbent or an inert gas such as nitrogen or argon. Note that it is more preferable to install a moisture amount monitor or an oxygen amount monitor in the photosensitive recording medium container 10 because the moisture amount and the oxygen amount in the disk accommodating portion 3 can be easily checked.

(Second Embodiment)
Next, a photosensitive recording medium container according to a second embodiment of the present invention will be described with reference to FIGS. 6 is a perspective view of a bag-shaped photosensitive recording medium container (hereinafter abbreviated as a bag-shaped container), and FIG. 7 is a bag-shaped container in which a flap is closed and a recording disk is accommodated. Sectional drawing, FIG. 8 is a principal part expanded sectional view of the sheet-like member which forms a bag-shaped container, and FIG. 9 is principal part sectional drawing of the bag-shaped container of a modification.

  As shown in FIGS. 6 to 8, the bag-like container 20 has a sheet-like member 22 folded back, and its three sides are air-tightly welded to form a bag, and the remaining one side that is not welded is The flap portion 20a is formed extending to the opening 21 side of the bag-like container 20. An adhesive member 24 is applied to the flap portion 20a.

As shown in FIG. 8, the sheet-like member 22 is a member in which the moisture absorption layer 8 is formed on the inner surface 23a of a vinyl sheet 23 that is a base material, for example. For the hygroscopic layer 8, any material suitable for the base material (vinyl sheet 23) in the hygroscopic member described in the first embodiment can be used. Further, a moisture-proof film 5 such as SiO ₂ may be formed on the outer surface 23 b of the vinyl sheet 23. The moisture-proof film 5 is not limited to the SiO ₂ moisture-proof film, and any of the various moisture-proof films described in the first embodiment can be any moisture-proof film suitable for the substrate.

  Then, after the recording disk 4 is inserted from the opening 21 of the bag-shaped container 20, the flap portion 20 a is folded back, and the opening 21 is sealed by the adhesive member 24 to accommodate the recording disk 4. The sealed bag-shaped container 20 may be filled with an oxygen adsorbent, an inert gas such as nitrogen or argon, or dry air.

  Moreover, as shown in FIG. 9, if the bag-like container 20 is formed by providing a large number of cells 25 in which a gas such as air is enclosed on the surface of the sheet-like member 22, the bag is excellent in impact resistance. The shaped container 20 can be obtained. This is desirable because it can prevent damage to the recording disk 4 due to dropping during conveyance of the recording disk 4 and interference with other members during handling.

(Third embodiment)
Next, a photosensitive recording medium container according to a third embodiment of the present invention will be described with reference to FIG. FIG. 10 is a perspective view of the photosensitive recording medium container according to the third embodiment. Note that the photosensitive recording medium container of the third embodiment is the same as the photosensitive recording medium of the first embodiment except that a moisture absorbent is provided in the disk housing portion instead of the moisture absorbing layer formed on the inner wall surface of the disk housing portion. Since it is the same as that of the medium container, the same portions are denoted by the same or corresponding reference numerals, and the description will be simplified or omitted.

  As shown in FIG. 10, the photosensitive recording medium container 40 of the third embodiment has a hygroscopic container 41 formed at one corner of the disk container 3, and the hygroscopic agent 41 is contained in the hygroscopic container 41. 42 is accommodated. As the hygroscopic agent 42, the same hygroscopic member used for the hygroscopic layer 8 of the photosensitive recording medium housing 10 of the first embodiment can be used.

  Since the moisture in the disk storage unit 3 is absorbed by the moisture absorbent 42, the disk storage unit 3 is maintained in a low humidity state, thereby preventing performance degradation due to the humidity of the stored recording disk 4. Since the hygroscopic agent 42 can be easily replaced, the photosensitive recording medium container 40 can be easily maintained in a good state. Other operations and effects can be easily inferred from the above description of the first embodiment, and thus description thereof will be omitted.

  In addition, in embodiment shown in FIG. 10, although it demonstrated as what contains the hygroscopic agent 42 in the hygroscopic agent accommodating part 41, it is not limited to this, For example, the hygroscopic agent 42 formed in plate shape is used. Alternatively, it may be installed at the bottom of the housing case 1 or inside the lid 2.

(Fourth embodiment)
Next, a photosensitive recording medium container according to a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 11 is a perspective view of a bag-shaped photosensitive recording medium container (hereinafter abbreviated as a bag-shaped container), and FIG. 12 is a cross-sectional view of the bag-shaped container in which a recording disk is stored. In addition, the bag-shaped container of the fourth embodiment is the photosensitive recording medium container of the third embodiment except that a hygroscopic agent is provided in the bag-shaped container instead of the hygroscopic layer formed on the inner surface of the substrate. Therefore, the same parts are denoted by the same or corresponding reference numerals, and the description will be simplified or omitted.

  As shown in FIGS. 11 and 12, the bag-shaped container 50 according to the fourth embodiment stores therein a hygroscopic agent 52 formed in a plate shape, for example, together with the recording disk 4. As the hygroscopic agent 52, the same hygroscopic member used for the hygroscopic layer 8 in the first embodiment can be used.

  The moisture in the bag-like container 50 is absorbed by the hygroscopic agent 52 and the inside of the bag-like container 50 is maintained in a low humidity state. Thereby, performance degradation due to the humidity of the recording disk 4 accommodated in the bag-like container 50 is prevented. Since the hygroscopic agent 52 can be easily replaced, the photosensitive recording medium container 50 can be easily maintained in a good state. Other operations and effects can be easily inferred from the above description of the third embodiment, and thus description thereof is omitted.

In order to confirm the effect of the present invention, an example relating to the photosensitive recording medium container of the present invention and a comparative example compared with the example will be described. In both the examples and comparative examples, the recording disks used were of the following specifications (see FIG. 3).
Substrate layer L1: A polycarbonate injection-molded substrate was used, the thickness (t) was 1.2 mm, the outer diameter (D) was 120 mm, and the inner diameter (d) was 15 mm.
Reflective layer L2: A layer having a thickness of 70 nm was formed by DC sputtering of aluminum.
First gap layer L3: formed by adhering a PC film with an adhesive. The total thickness was 100 μm.
Selective reflection layer L4: formed by alternately laminating thin films of TiO ₂ and SiO ₂ by sputtering. Specifically, when TiO ₂ is represented by T and SiO ₂ is represented by S, T, S, T, S, T, S, T, S, and T are obtained. The thickness of each layer of TiO ₂ and SiO ₂ is λ / (4n). Here, n is 2.5 for TiO ₂ and 1.5 for SiO ₂ , and the wavelength λ is 532 nm.
Second gap layer L5: A PC film was attached with an adhesive material. The total thickness was 100 μm.
Hologram recording layer L6: A photopolymer was formed to a thickness of 500 nm according to the following formulation.
・ Di (urethane acrylate) oligomer (manufactured by Echo Resins, ALU-351) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 59 parts by mass ・ Isobornyl acrylate ・ ・ ・ 30 parts by mass ・ Vinylbenzoate ・ ・・ ・ ・ ・ ・ ・ 10 parts by mass ・ Polymerization initiator (Ciba Specialty Chemicals, Irgacure 784) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 1 part by mass L7: A polycarbonate having a thickness of 0.6 mm was used.

(Example)
Test conditions and evaluation method Put the recording disk with the above specifications in a black light-shielding bag, and then put it in a plastic bag containing 10 g of silica gel, and store it in an environment of 30 ° C and 85% RH for 14 days. The characteristics were compared. For recording and reproduction, SHOT1000 manufactured by Pulstec was used, and the power at which the recorded image was most clearly obtained was measured.

(Comparative example)
Test conditions and evaluation method The same conditions as in the above example except that silica gel was not put in the plastic bag.

From the above test, the following results were obtained.
Before storage After storage Example 100 mJ / cm ² 110 mJ / cm ²
Comparative Example 100 mJ / cm ² 140 mJ / cm ₂

  As shown in the above test results, the characteristics after storage for 14 days in an environment of 30 ° C. and 85% RH were found to be deteriorated in the comparative examples, but almost no changes were observed in the examples. The effectiveness of the invention has been demonstrated.

It is a perspective view of the photosensitive recording medium container of the first embodiment. It is a perspective view of a photosensitive recording medium. FIG. 2 is an enlarged longitudinal sectional view of a main part of a photosensitive recording medium. FIG. 3 is a perspective view of a cartridge in which a photosensitive recording medium is rotatably accommodated. It is a VV arrow sectional view in FIG. It is a perspective view of the photosensitive recording medium container (bag-shaped container) of the second embodiment. It is sectional drawing of the bag-shaped container in which the flap part was closed and the recording disc was accommodated. It is a principal part expanded sectional view of the sheet-like member which forms a bag-shaped container. It is principal part sectional drawing of the bag-shaped container of a modification. It is a perspective view of the container for photosensitive recording media of 3rd Embodiment. It is a perspective view of the container for photosensitive recording media (bag-shaped container) of 4th Embodiment. It is sectional drawing of the bag-shaped container in which the recording disc was accommodated.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage case 1d Inner wall surface 2 Lid part 2d Inner wall surface 3 Disk storage part 4 Recording disk (photosensitive recording medium, hologram recording medium)
8 Hygroscopic layer 10, 20, 40, 50 Photosensitive recording medium container 30 Cartridge (cartridge for photosensitive recording medium)
42,52 Hygroscopic agent

Claims (5)

A photosensitive recording medium container comprising a disc container that can accommodate a photosensitive recording medium or a photosensitive recording medium cartridge in which the photosensitive recording medium is rotatably accommodated.
A photosensitive recording medium container, wherein the disk container is provided with a moisture absorbing member that absorbs moisture.   The photosensitive recording medium container according to claim 1, wherein the moisture absorbing member is a moisture absorbing layer formed on an inner wall surface of the disk housing portion.   The photosensitive recording medium container according to claim 1, wherein the hygroscopic member is a hygroscopic agent installed in the disk housing portion.   The photosensitive recording medium container according to any one of claims 1 to 3, wherein the hygroscopic member contains at least one of magnesium sulfate, calcium chloride, silica gel, and zeolite.   The photosensitive recording medium container according to any one of claims 1 to 4, wherein the photosensitive recording medium is a hologram recording medium.

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