JP2007052115A - Photosensitive recording medium cartridge - Google Patents

Abstract

Photosensitive recording which is excellent in dimensional accuracy, physical strength, injection moldability, scratch resistance, etc., has good slidability, prevents photosensitivity by reflected light, and further prevents generation of harmful gases. A cartridge for media is provided.
A photosensitive recording medium cartridge 10 according to the present invention has a cartridge body 11 having a melt flow rate (G condition of ASTM D 1238) of 2 to 40 g / 10 min and a flexural modulus (JIS K 7203) of 18. 1,000 kg / cm ² or more, molecular weight distribution of 5 or less, and 0.1 to 100 parts by weight of the silicone resin relative to 100 parts by weight of the rubbery polymer-containing aromatic monovinyl resin containing 1 to 40% by weight of the rubbery polymer. It is composed of an injection molded product containing 10 parts by weight and having a surface reflection glossiness of 45% or less.
[Selection] Figure 1

Description

  The present invention relates to a cartridge for a photosensitive recording medium that is excellent in dimensional accuracy, physical strength, light shielding properties and the like and accommodates a photosensitive 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). Further, there is known a cartridge in which a cartridge casing, a shutter plate, and a cover are configured (see, for example, Patent Document 3).

  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.

  In the invention described in Patent Document 3, an overlap is provided between the periphery of the opening of the cartridge housing and the shutter plate, and between the shutter plate and the periphery of the opening of the cover. Prevent entry.

  On the other hand, various types of injection-molded articles for photosensitive recording media have been proposed for use in photographic film cartridges, photosensitive strips, lens-equipped film units and instant film units. In Patent Document 4, a photosensitive band material cut into a strip shape and wound in a roll shape, for example, a microfilm, a microfilm for computer output, a film for computer photosetting, or the like is incorporated in an exposure apparatus in a bright room. A sex band container (with a heavy product of 1 kg or more) has been proposed.

  In Patent Document 5, a light-tight cartridge is loaded into a loading chamber, and the loading lid is closed, thereby opening and closing the light-tight cartridge, and unlocking the locking means provided on the loading lid. There has been proposed a camera using a light-tight cartridge provided with an opening / closing lid operating means for closing the open / close lid in a light-tight manner and means for pulling out the film in the light-tight cartridge in association with the formation of the film entrance / exit. ing.

  In Patent Document 6, resin molded parts constituting the cartridge main body are made of a resin material having excellent ultrasonic welding suitability, and the resin molded parts are ultrasonically connected to each other while maintaining a state where the cartridge main body and the photographic film are not in direct contact with each other. A photographic film cartridge assembled by welding has been proposed.

  Patent Document 7 proposes a molded article for a photosensitive recording medium containing a thermoplastic resin having specific values for molecular weight distribution and melt flow rate, and a lubricant.

JP 2004-029476 A JP 2003-317422 A JP 2003-317424 A JP-A-1-187547 Japanese Patent Laid-Open No. 2-64533 JP-A-6-67348 JP-A-9-80693

  By the way, in the cartridge containing the hologram recording medium, if light shielding and dust prevention between the cartridge main body and the shutter are not properly performed, light and dust enter the cartridge, and the hologram recording medium is adversely affected. End up. In addition, the injection-molded product used for the photosensitive recording medium cartridge is said to have a high-grade appearance due to its high gloss appearance, and a rubber-containing polystyrene-based polymer obtained by graft-modifying homo-type polystyrene resin and fine-grained butadiene rubber. It is conceivable to form the resin, a resin containing a nitrile group and a styrene group, or the like.

  However, when such a resin is used, the physical strength is lowered, the light absorption is insufficient, and the reflected recording light causes photosensitivity on the photosensitive recording medium, scratches on the surface of the injection molded product, reflected light, or thermal decomposition. There was a problem that harmful gases (hydrogen cyanide gas, aldehyde gas, sulfur compound gas, etc.) were generated.

  The present invention has been made in view of the above circumstances, and its purpose is excellent in dimensional accuracy, physical strength, injection moldability, scratch resistance, etc., and has good slidability, preventing photosensitivity by reflected light, It is another object of the present invention to provide a photosensitive recording medium cartridge capable of preventing generation of harmful gas.

The above object of the present invention is achieved by the following cartridge.
(1) Provided in at least one of the first shell formed in a substantially plate shape, the second shell joined so as to overlap the first shell, and the first shell and the second shell. And a shutter for opening and closing the opening, and a cartridge for photosensitive recording medium in which a disc-shaped photosensitive recording medium is rotatably accommodated in a cartridge body formed by combining the first shell and the second shell, The cartridge body has a melt flow rate (G condition of ASTM D 1238) of 2 to 40 g / 10 min, a flexural modulus (JIS K 7203) of 18,000 kg / cm ² or more, a molecular weight distribution of 5 or less, and a rubber 0.1 to 10 parts by weight of a silicone resin with respect to 100 parts by weight of an aromatic monovinyl resin containing 1 to 40% by weight of a polymer, and Photosensitive recording medium cartridge, wherein the surface reflection gloss is composed of injection-molded article is 45% or less.
(2) The above-mentioned rubbery polymer is one or a mixture of two or more selected from polybutadiene rubber, butadiene-styrene random copolymer rubber and acrylonitrile-butadiene copolymer rubber. The cartridge for photosensitive recording media as described in 1).
(3) The photosensitive recording medium cartridge according to (1), wherein the silicone resin is a silicone-based oil having a viscosity at 25 ° C. of 5,000 to 50,000 centistokes.
(4) The rubbery polymer-containing aromatic monovinyl resin is composed of 20 to 50 parts by weight of a rubbery polymer-containing ABS resin and 80 to 50 parts by weight of the aromatic monovinyl resin, and the rubbery polymer-containing aromatic (20) The photosensitive recording medium cartridge as described in (19) above, wherein 0.001 to 20 parts by weight of a hydrogen cyanide gas adsorbing substance that adsorbs and holds hydrogen cyanide gas with respect to 100 parts by weight of the monovinyl resin.
(5) 0.1 to 5 parts by weight of an aliphatic alcohol fatty acid ester is contained with respect to 100 parts by weight of the rubbery polymer-containing aromatic monovinyl resin, as described in (1) above Cartridge for recording medium.
(6) The cartridge according to (1), wherein the photosensitive recording medium is a hologram recording medium.

  According to the present invention, dimensional accuracy, physical strength, injection moldability, scratch resistance, etc. are excellent, sliding property is good, photosensitivity by reflected light is prevented, and generation of harmful gas can be prevented. A photosensitive recording medium cartridge can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 are perspective views showing the external shape of a hologram recording medium cartridge (hereinafter abbreviated as a cartridge) according to an embodiment of the present invention. FIG. 1 is a perspective view showing a state in which one surface of the cartridge is upward, FIG. 2 is a perspective view showing a state in which the opposite surface is upward, and FIG. 1 is a perspective view showing a state in which a disc-shaped hologram recording medium (hereinafter referred to as a recording disk) is rotatably accommodated. FIG.

  As shown in FIG. 1 to FIG. 3, the cartridge 10 is loaded from the direction of the arrow C into a hologram recording apparatus or the like that handles the cartridge 10. Positioning grooves 17 and 18 into which positioning members provided in each device are inserted when the cartridge 10 is loaded in various devices such as a hologram recording device (not shown) are provided on both side surfaces of the front end of the cartridge 10 in the loading direction. It has been.

  The recording disk 14 is a hologram recording disk having a disk shape with a hole in the center, and hologram recording layers are provided on both sides. In this hologram recording layer, for example, data is recorded in a multi-layered manner as interference fringes of laser light by laser light in the wavelength range of green 532 nm to blue 405 nm. A reinforcing material may be added to the hole of the recording disk 14. The cartridge 10 is set in the hologram recording apparatus with either the A surface 12 or the B surface 13 facing upward in order to perform recording on both recording surfaces of the recording disk 14.

  The cartridge 10 is assembled between a cartridge main body 11 having a disk housing portion 16 formed therein, a light shielding plate 30 attached so as to sandwich the outside of the cartridge main body 11, and the cartridge main body 11 and the light shielding plate 30. And a shutter 15. On the upper and lower surfaces of the light shielding plate 30, substantially rectangular external openings 31 and 33 that are second openings are formed. These external openings 31 and 33 are closed by the shutter 15 when the shutter 13 is in the closed position.

  As shown in FIG. 3, when the shutter 15 moves toward the open position in the direction of arrow D, the external openings 31 and 33 and the same shape provided in the cartridge body 11 so as to face the external openings 31 and 33 are provided. Openings 21 and 22 are opened. Thereby, the central part 14a of the recording disk 14 accommodated in the disk accommodating part 16 and the recording surface 14b are exposed to the outside.

  The shutter 15 is urged to a closed position by a built-in shutter spring, and is locked at the closed position by a lock mechanism. To release the lock mechanism, the second lock member 64 protruding into the positioning groove 17 is pushed into the cartridge main body 11, and in this state, exposed from the openings 73 and 72 of the A surface 12 and B surface 13 of the cartridge main body. The first lock member 63 is slid to the rear end side in the cartridge loading direction. Thus, since the shutter 15 is locked at the closed position by the lock mechanism that cannot be released unless a two-stage operation is performed, the shutter 15 is not inadvertently opened.

FIG. 4 is an exploded perspective view showing the configuration of the cartridge 10.
As shown in FIG. 4, the cartridge body 11 includes a substantially plate-like first shell 25, a second shell 26 joined to the first shell 25, and the first shell 25 and the second shell 26. The lock mechanism 27 is incorporated and locks the shutter 15.

  The first shell 25 and the second shell 26 are formed by injection molding using, for example, the same or similar thermoplastic plastic to which a light shielding material and a lubricant are added.

  As shown in FIG. 4, the outer surfaces of the first shell 25 and the second shell 26 have step portions that are slightly larger than the shape of the light shielding plate 30 and deeper than the thickness of the light shielding plate 30. Offset light shielding plate mounting surfaces 25a and 26a are formed.

  As the material of the light shielding plate 30, for example, an aluminum alloy is used as a material that can obtain light shielding properties, corrosion resistance, decorative properties, and workability, and is light and strong. The light shielding plate 30 may be made of plastic. However, in order to ensure the light shielding property and the slipperiness of the shutter 15, it is preferable to use a plastic to which a light shielding material and a lubricant are added. As shown in FIG. 4, the light-shielding plate 30 is formed of an aluminum alloy thin plate with external openings 31 and 33 and a notch 32 for obtaining a moving range of the shutter 15 so that the cross section is substantially U-shaped. It is bent. Thereby, the light shielding plate 30 has the first plate portion 30a and the second plate portion 30b each having the external openings 31 and 33, and the notch 32, and the first plate portion 30a and the second plate portion. A third plate portion 30c is provided to connect with 30b.

  The light shielding plate 30 sandwiches the B surface 13 and the A surface 12 of the cartridge main body 11 with the first plate portion 30a and the second plate portion 30b, and the loading direction C of the cartridge main body 11 with the third plate portion 30c. It is attached to the light shielding plate attachment surfaces 25a and 26a of the cartridge body 11 so as to cover the tip. Since the light shielding plate mounting surfaces 25 a and 26 a are offset inward at a depth greater than the thickness of the light shielding plate 30, the outer surface of the light shielding plate 30 attached to the cartridge body 11 protrudes from the surface of the cartridge body 11. There is no.

  As shown in FIG. 4, small holes 35 are formed at substantially equal intervals on the outer periphery of the first plate portion 30 a and the second plate portion 30 b of the light shielding plate 30. In addition, pins 50 slightly longer than the thickness of the light shielding plate 30 are integrally formed on the light shielding plate mounting surfaces 25 a and 26 a of the first shell 25 and the second shell 26 at positions corresponding to the holes 35 of the light shielding plate 30. Has been.

  When the light shielding plate 30 is attached to the outside of the cartridge body 11 (light shielding plate attachment surfaces 25a, 26a), the pins 50 of the first shell 25 and the second shell 26 are inserted into the holes 35 and protrude from the surface of the light shielding plate 30. The The light shielding plate 30 is fixed to the cartridge main body 11 by the tips of the pins 50 being crushed by heat.

  In addition, as a method for fixing the light shielding plate 30 to the cartridge main body 11, an adhesive, a double-sided tape, screwing, or the like can be used. Further, when the light shielding plate 30 is made of plastic, various types of welding can be used.

  As shown in FIG. 4, the shutter 15 is a shutter member 55 obtained by bending a light-shielding thin plate so as to be substantially U-shaped, and an elongated plate-like slide member 56 attached to the shutter member 55. Consists of. The shutter member 55 is formed of, for example, an aluminum alloy for the same reason as the light shielding plate 30. The shutter member 55 may also be formed of plastic, but it is also preferable to use plastic to which a light-shielding substance and a lubricant are added in order to ensure light-shielding properties and sliding properties. The slide member 56 is formed of a plastic to which a light shielding material and a lubricant are added.

  The shutter member 55 includes a first shutter 15 a inserted between the outer surface of the first shell 25 and the first plate portion 30 a of the light shielding plate 30, and the outer surface of the second shell 26 and the second plate of the light shielding plate 30. The second shutter 15b is inserted between the second shutter 15b, the first shutter 15a, and the second shutter 15b. The second shutter 15b is connected to the second shutter 15b.

  On the outer surfaces of the first shell 25 and the second shell 26, shutter sliding surfaces 25b and 26b are formed on the inner side of the light shielding plate mounting surfaces 25a and 26a and offset inward at a depth greater than the thickness of the shutter member 55. Has been. Thereby, since the shutter 15 can move smoothly between the cartridge main body 11 and the light shielding plate 30, generation of chips and the like due to the movement can be suppressed. The shutter sliding surfaces 25b and 26b may be roughened in order to diffuse incident light. Similarly, the inner surface of the light shielding plate 30 and the inner and outer surfaces of the shutter 15 may be roughened.

  The slide member 56 is slidably incorporated between the first shell 25 and the second shell 26 so that the upper surface is exposed from the front end surface of the cartridge body 11 in the loading direction. An attachment surface 56 a that is attached to the inner surface of the continuous portion 55 c of the shutter member 55 is provided at the upper end portion of the slide member 56. For example, two pins 56b are integrally formed on the mounting surface 56a, and are inserted into the two holes 55d provided in the connecting portion 55c, and the tip is crushed by heat, whereby the shutter member 55 and The slide member 56 is fixed. Note that an adhesive, a double-sided tape, or the like may be used for this fixing, and various welding may be used when the shutter member 55 is formed of plastic. Further, screwing may be used.

  An operated portion 56 d that is operated when the shutter 15 is opened is integrally formed at the upper end portion of the slide member 56. The operated portion 56d is exposed to the outside of the shutter member 55 without being hidden by the third plate portion 30c of the light shielding plate 30 by providing the slide member 56 so as to extend in the shutter closing direction. . The cutout 32 of the third plate portion 30c of the light shielding plate 30 is provided to avoid interference with the operated portion 56d when the shutter 15 is moved to the open position (see FIG. 3).

  The shutter 15 is urged in the closing direction by a shutter spring 59. The shutter spring 59 is formed of, for example, a torsion coil spring, and both ends thereof are locked to the slide member 56 and the inner surface of the first shell 25.

  The lock mechanism 27 includes a first lock member 63 that locks the shutter 13 in the closed position, a second lock member 64 that locks the movement of the first lock member 63, and the second lock member 64 in the drawing. The lock spring 65 is biased toward the counter-hour hand direction and upward.

  The injection molded product constituting the cartridge body 11 of the photosensitive recording medium cartridge 10 according to the present invention contains a rubbery polymer-containing aromatic monovinyl resin, and this rubbery polymer-containing aromatic monovinyl resin is a rubber. Graft polymer of polymer and aromatic monovinyl, mixture of rubber polymer and aromatic monovinyl resin simply kneaded, graft polymer of rubber polymer and aromatic monovinyl, and aromatic monovinyl There are three modes of the mixture with the resin.

  For the rubbery polymer-containing aromatic monovinyl resin, the rubbery polymer is 1 to 40% by weight, preferably 1.5 to 35% by weight, more preferably 2 to 30% by weight, most preferably 2.5 to 25%. Contains by weight. When the content of the rubbery polymer is less than 1% by weight, the abrasion resistance is inferior and the physical strength is small. In photographic film cartridges (for example, APS film cartridges), instant film units, camera bodies, photographic film cartridges, photographic film magazines, and photographic film units with lenses, insufficient strength and wear resistance when dropped. It is difficult to put it to practical use. If the content exceeds 40% by weight, the photosensitive recording medium (photographic film) is left in the room only for 3 months or longer with the cartridge inserted (for example, the camera is loaded with the cartridge containing the photographic film). so). As a result, the fog is increased by 0.03 or more over time, or the sensitivity is partially increased by 20% or more, resulting in density unevenness and color unevenness in the photographic print, which is difficult to put into practical use. Further, the bending elastic modulus becomes small and the film is easily deformed, resulting in poor light shielding properties.

  Examples of rubber polymers include ethylene / propylene copolymer rubber, ethylene / propylene / non-conjugated diene terpolymer rubber, isoprene copolymer rubber, polyisobutylene rubber, styrene-isoprene copolymer rubber, and polybutadiene rubber. Butadiene-styrene copolymer rubber, acrylonitrile-butadiene copolymer rubber, etc., and polybutadiene rubber having high cis content (preferably cis 1,4 bond is 70 mol% or more, preferably 90 Mol% or more) and low-cis polybutadiene rubber with low cis content are used.

  Among these rubber polymers, it is preferable to use one or a mixture of two or more selected from polybutadiene rubber, butadiene-styrene random copolymer rubber, and acrylonitrile-butadiene copolymer rubber. By using these rubber-like polymers, the physical strength can be greatly improved with little adverse effect on the recording properties of the photosensitive recording medium. Furthermore, the surface reflection glossiness of the injection molded product can be reduced.

  The average particle size of the rubbery polymer is suitably 0.1 to 10 μm, preferably 0.2 to 7 μm, more preferably 0.5 to 5 μm, and most preferably 0.7 to 3.5 μm. . When the average particle size is less than 0.1 μm, the surface reflection gloss becomes large, the cost becomes high, the impact strength decreases, the scratches increase, and the injection molded product used for the photosensitive recording medium cartridge according to the present invention. It is difficult to put to practical use. On the other hand, if the average particle diameter exceeds 10 μm, the surface irregularities are large, the tensile strength and the like are lowered, and it is difficult to put it to practical use.

  When the average particle size is small, an injection molded product having a high glossiness and a smooth surface can be obtained, but it is easily scratched and the polymerization cost is increased. On the other hand, it has been found that when the average particle size is large, the reflection decreases and the glossiness decreases. Therefore, when trying to obtain a high-gloss injection molded product, a rubber polymer resin having an average particle diameter of 0.1 to 1.5 μm, preferably 0.2 to 1.0 μm, is used to prevent reflection. When trying to obtain a mat-like low-gloss injection-molded product, a rubber polymer resin having an average particle size of 1.5 to 10 μm, preferably 1.7 to 7 μm, more preferably 2.0 to 5 μm is used. Use. Thus, if an injection molded product having an average particle diameter of 1.5 to 10 μm is used, light fogging due to reflection of light can be prevented without embossing the surface. Furthermore, if embossing is performed, the photosensitive recording medium can be more completely prevented from being exposed to light by reflection of light.

The average particle size of the rubbery polymer is calculated by the following formula by cutting out ultrathin pieces with a microtome, taking a photograph with a transmission electron micrograph, measuring the particle size of 600 rubbery polymers in the photograph. .
Average particle size = ΣnD ₂ / ΣnD {where n is the particle size, and D is the number of rubber polymer particles}

  The average particle diameter of the rubber polymer can be adjusted by the stirring conditions during polymerization, the solution viscosity of the rubber polymer, and the like.

  Examples of the aromatic monovinyl resin in the aromatic polymer-containing aromatic monovinyl resin include styrene and o-methylstyrene, p-methylstyrene, m-methylstyrene, p-methylstyrene, m-methylstyrene, and 2,4-dimethylstyrene. , Ethyl styrene, p-tert-butyl styrene, etc., nuclear alkyl-substituted styrene, 2,4,6-tribromo styrene, 2,4,6-trichloro styrene, etc., halogenated styrene, α-methyl styrene, α-methyl Α-Alkyl-substituted styrene such as -p-methylstyrene is used. In addition, methacrylic acid ester, acrylic acid ester, acrylonitrile, and maleic anhydride copolymerizable with styrenic monomers are also included.

  When the rubber-containing aromatic monovinyl resin is a polymer of rubbery polymer and aromatic monovinyl (mostly graft polymerization), the polymerization can be carried out by the polymerization method described below.

[Radical polymerization method]
(1) Advantages of batch bulk polymerization method: Can be easily manufactured.
Disadvantages ... Difficult to disperse heat on a large scale.
Wide molecular weight distribution and excellent moldability.
(2) Advantages of continuous bulk polymerization method: Product quality is uniform.
Manufacturing cost is low.
Disadvantages: Transport of highly viscous reaction liquids.
Channeling development in the reaction tower.
(3) Advantages of continuous solution polymerization method: Easy to control polymerization heat.
Disadvantages: Solvent removal is required.
Stirring method is difficult.
(4) Advantages of suspension polymerization method: Polymerization heat can be removed.
A granular polymer is obtained.
Little residual monomer.
Disadvantages: Contamination due to water and stabilizers.
Requires devolatilization.
Drying and pelletizing are required.
(5) Advantage of emulsion polymerization method: Large reaction rate.
Polymerization heat can be removed.
Continuous polymerization is also possible.
A latex polymer is obtained.
Disadvantages: Contamination caused by water or emulsifier occurs Drying or pelletizing is required

[Ion polymerization method]
(1) Advantages of ion polymerization method: High reaction rate.
Polymerization heat control is possible.
Disadvantages: Solvent and catalyst powder must be removed.
Requires freezing.

  Among these polymerization methods, from an economical viewpoint, a bulk polymerization method in which a styrene monomer is polymerized by a radical reaction in the presence of a rubbery polymer and a bulk-suspension two-stage polymerization method are preferable, and a continuous bulk polymerization method is particularly preferable. However, it is preferable because it is inexpensive and contains few substances that adversely affect the photosensitive recording medium. In addition, suspension polymerization (batch type) is preferable from the viewpoint that the residual monomer is small, the heat resistance is excellent, and the turning is small. In the present invention, those polymerized by a continuous bulk polymerization method are particularly preferred from the viewpoints of economy and quality stability.

  The rubber polymer-containing aromatic monovinyl resin has a melt flow rate (G condition of ASTM D1238) of 2 to 40 g / 10 minutes, preferably 2.5 to 35 g / 10 minutes, more preferably 3 to 30 g / 10 minutes. 3.5 to 25 g / 10 min is most preferable. When the melt flow rate is less than 2 g / 10 min, the resin fluidity is poor, short shots and weld lines are frequently generated, the molding cycle becomes long, and it is difficult to put it to practical use. On the other hand, if it exceeds 40 g / 10 minutes, the physical strength is small, the occurrence of burrs is large, and thermal deterioration is likely to be difficult to put into practical use.

Rubbery polymer-containing aromatic monovinyl resin is a resin flexural modulus (JISK 7203) is 18,000kg / cm ² or more, preferably 19,000kg / cm ² or more, 20,000 kg / cm ² or more, more preferably 21,000 kg / cm ² or more is most preferable. If the flexural modulus is less than 18,000 kg / cm ² , sufficient rigidity and physical strength cannot be ensured. Therefore, when an external force is applied, deformation is likely to occur, and dimensional accuracy and complete light shielding properties cannot be ensured. In particular, in a photosensitive recording medium cartridge, light enters through a gap generated by deformation, and the recording medium is exposed.

  The rubbery polymer-containing aromatic monovinyl resin has a molecular weight distribution of 5 or less, preferably 4.5 or less, more preferably 4 or less, and most preferably 1.1 to 3.5. When the molecular weight distribution exceeds 5, the dimensional accuracy is deteriorated and the physical strength is lowered, which may make it difficult to put into practical use.

  The rubber polymer-containing aromatic monovinyl resin has an Izod impact strength (JIS K-6871) of preferably 2.0 kg · cm / cm or more, more preferably 2.5 kg · cm / cm or more, and more preferably 3.0 kg · cm / cm. 3.5 kg · cm / cm or more is particularly preferable, and 4 kg · cm / cm is most preferable.

  The ABS (acrylonitrile-butadiene-styrene) resin, which is a rubbery polymer-containing aromatic monovinyl resin in the present invention, will be described.

  (1) Molecular structure and characteristic properties ABS resin is a thermoplastic resin mainly composed of acrylonitrile (A), butadiene (B), and styrene (S). Since the AS copolymer is grafted to the dispersed polybutadiene particles, the compatibility between the polybutadiene particles and the surrounding AS continuous phase is good, and aggregation between the polybutadiene particles is not observed.

  Since ABS resin is a graft rubber particle dispersion system similar to high impact polystyrene (HIPS) resin, the viscoelastic temperature characteristics are dispersion absorption around −80 ° C. by polybutadiene rubber and dispersion absorption around + 120 ° C. by AS copolymer. Divided into

  The impact strength, which is the greatest feature of ABS resin, is due to the absorption of impact energy due to deformation of polybutadiene particles and the absorption of impact energy due to the formation of crazes generated from the polybutadiene particle interface. In addition to the generation of crazes, a mechanism that suppresses the propagation of crazes and the destruction of crazes is also important for increasing the impact strength.

  In addition to good injection molding processability, it also has excellent rigidity and chemical resistance. Moreover, coloring with a light-shielding substance is free, and secondary workability such as painting, printing, hot stamping, vacuum deposition, and plating is also good. Blends with other resins such as polycarbonate resin and polyvinyl chloride resin form a product group characterized as ABS alloy. The only drawback is that it adversely affects recording properties and is inferior in weather resistance, but it is also the hydrogen cyanide gas adsorbing material of the present invention, carbon black, fatty acid metal salt, anti-aging agent, ultraviolet absorber, antioxidant, etc. It has been improved by the addition of the above modifier and the study of the resin composition, and can be put to practical use as a photosensitive recording medium injection-molded product.

(2) Production method 1) Graft blend method An AN / ST monomer was reacted with polybutadiene latex to adversely affect the recording performance, but an ABS resin with a high impact strength and a high rubber content was produced separately. A predetermined ABS resin is obtained by blending an AS copolymer resin that does not adversely affect the recording performance of the photosensitive recording medium. Recently, there are many graft blend methods. 20 to 45 parts by weight of the ABS resin, 27.5 to 40 parts by weight of an AS copolymer resin having a weight average molecular weight of 100,000 or more, and an AS copolymer resin 40 to 27.5 having a weight average molecular weight of less than 100,000. A resin obtained by blending parts by weight to give a predetermined ABS resin has good recording properties and very high impact strength, and is preferable as an injection-molded product for the photosensitive recording medium cartridge of the present invention.
2) Bulk / suspension polymerization method Uncrosslinked rubber is dissolved in ST monomer and pre-bulk polymerization is performed in a rubber matrix state. When phase transition to a rubber dispersion state occurs, a suspension system graft reaction is performed to obtain ABS. Obtain a resin. Since it is difficult to produce an ABS resin having a high rubber content by this method, it may be blended with an ABS resin and an AS copolymer resin produced by other methods to obtain a target ABS resin.
3) Emulsion / Continuous Bulk Polymerization Method An AN / ST monomer and an electrolyte are added to and mixed with an ABS latex having a high rubber content prepared by an emulsion polymerization method, and the separated water is removed to obtain ABS crumb. An ABS resin is obtained by adding AN / ST monomer to this ABS crumb and performing continuous bulk polymerization as ABS dope. According to this method, the ABS resin powder is not required to be coagulated, washed with water, and dried.

(3) Domestic manufacturer Asahi Kasei Ube Saikon Toray Mitsubishi Rayon Nippon Synthetic Rubber Cooperative Polymer Mitsubishi Monsanto Sumitomo Nougatack Electrochemistry

  The rubbery polymer-containing aromatic monovinyl resin as described above is preferably contained in an injection molded article for a photosensitive recording medium in an amount of 20% by weight or more, more preferably 40% by weight or more, and particularly preferably 60% by weight. % Or more, most preferably 80% by weight or more. When the content of the rubber-like polymer-containing aromatic monovinyl resin is less than 20%, the dimensional accuracy, physical strength, injection moldability, scratch resistance, slidability, light shielding properties, etc. cannot be sufficiently exhibited.

Preferable examples of the rubbery polymer-containing aromatic monovinyl resin include those described below.
(1) A rubbery polymer-containing aromatic monovinyl resin comprising 20 to 50 parts by weight of a rubbery polymer-containing ABS resin and 80 to 50 parts by weight of an aromatic monovinyl resin.
(2) A rubbery polymer-containing aromatic monovinyl resin comprising 20 to 45 parts by weight of a rubbery polymer-containing ABS resin (preferably a graft polymer) and 55 to 75 parts by weight of an AS copolymer resin.
(3) 55 to 80 parts by weight of AS copolymer resin (2) is 27.5 to 40 parts by weight of AS copolymer resin having a weight average molecular weight of 100,000 or more, and AS copolymer resin having a weight average molecular weight of less than 100,000. A rubbery polymer-containing aromatic monovinyl resin composed of a blend of 40 to 27.5 parts by weight of a polymer resin.

  The injection-molded article of the photosensitive recording medium cartridge according to the present invention contains 0.1 to 10 parts by weight of a silicone resin with respect to 100 parts by weight of the above-mentioned rubber polymer-containing aromatic monovinyl resin, preferably It contains 0.2 to 8 parts by weight, more preferably 0.4 to 6 parts by weight, particularly preferably 0.5 to 4 parts by weight, and most preferably 0.6 to 3 parts by weight. By including the silicone resin, the fluidity of the rubbery polymer-containing aromatic vinyl resin is improved, and as an unexpected effect, the physical strength preferable for the injection molded product of the photosensitive recording medium cartridge of the present invention is obtained. Improve the surface reflection gloss. Furthermore, lubricity can be improved. Further, when used in combination with a light-shielding substance, the dispersibility of the light-shielding substance is improved and the resin is made cloudy to increase haze (ASTMD-1003). As a result, the coloring power can be improved and the light shielding property can be improved.

  When the content of the silicone resin is less than 0.1 parts by weight, the above-described effects cannot be effectively exhibited. On the other hand, when the amount exceeds 10 parts by weight, not only the effect of increasing the weight is not exhibited but also the bleed out increases and the commercial value is lowered.

  The most serious problem is that the occurrence of slip with the screw increases during injection molding, making it difficult to inject a certain amount, causing frequent short shots, reducing dimensional accuracy, and difficult to put into practical use.

Among silicone resins, silicone oil is preferable because it has the effects described below.
(1) The dispersibility is improved by covering these surfaces only by using together with a fibrous filler, a non-fibrous light-shielding substance and a pigment.
(2) Improve resin dispersibility, reduce screw motor load and prevent melt fracture.
(3) The lubricity can be sufficiently secured without adding a fatty acid amide that bleeds out and becomes white powder.
(4) Reduce the coefficient of friction of the molding material in the heated state.
(5) When used in combination with a light-shielding substance, the thermoplastic resin becomes clouded and haze is increased. As a result, the coloring power can be improved and the light-shielding ability can be improved. Can be secured.

  The silicone oil preferably has a viscosity at 25 ° C. in the range of 5,000 to 50,000 centistokes, more preferably in the range of 7,000 to 40,000 centistokes, and 9,000 to 35,000. Those in the range of 000 centistokes are particularly preferred, and those in the range of 10,000 to 30,000 centistokes are most preferred. When the viscosity of the silicone oil is less than 5,000 centistokes, there are many unreacted low molecular weight substances, which may deteriorate the recording property (increased covering, etc.). On the other hand, when the viscosity exceeds 50,000 centistokes, the viscosity is large and the handling property is poor, and it may adhere to the container and cannot be taken out, or the fluidity of the resin may be lowered and a molding failure may occur.

  Examples of silicone oils include polymethylphenylsiloxane, olefin-modified silicone, amide-modified silicone, polydimethylsiloxane, amino-modified silicone, carboxyl-modified silicone, α-methylstyrene-modified silicone, polyether-modified silicone modified with polyethylene glycol and polypropylene glycol, Silicone oils containing modified siloxane bonds such as olefin / polyether-modified silicone, epoxy-modified silicone, amino-modified silicone, and alcohol-modified silicone.

  Among these silicone oils, olefin-modified silicones, amide-modified silicones, polydimethylsiloxanes, polyethers are preferred when applied to packaging materials with little adverse effect on photosensitive recording media and a large sliding effect. Modified silicone, olefin / polyether modified silicone.

  The injection molded product of the photosensitive recording medium cartridge containing the rubber polymer-containing aromatic monovinyl resin and the silicone resin as described above has a surface reflection glossiness (incident angle of 60 degrees according to JISZ 8741, light receiving angle of 60 degrees. (Measured in degrees) is 45% or less, preferably 40% or less, more preferably 35% or less, particularly preferably 30% or less, and most preferably 25% or less. When the surface reflection glossiness exceeds 45%, there is a possibility that light fogging due to reflected light occurs.

  The black light-shielding substance can be contained in the injection molded product of the photosensitive recording medium cartridge according to the present invention. By containing the black light-shielding substance, the light-shielding property can be imparted to the injection molded product of the photosensitive recording medium cartridge, and the physical strength can be increased.

  The black light-shielding substance preferably contains 0.05 to 10 parts by weight, preferably 0.1 to 8 parts by weight of the black light-shielding substance with respect to 100 parts by weight of the rubbery polymer-containing aromatic monovinyl resin. Is more preferable, 0.15 to 6 parts by weight is particularly preferable, and 0.2 to 4 parts by weight is most preferable.

  If the content of the black light-shielding substance is less than 0.05 parts by weight, the light-shielding property may not be sufficiently secured unless the effect of addition is small and the thickness is increased. If the content exceeds 10 parts by weight, the fluidity of the resin is deteriorated, the effect of adding the resin cannot be obtained, and only the cost is increased, and silver, short shots, and irregularities may occur. .

  Examples of the black light shielding material include carbon black, graphite, black iron oxide, carbon fiber, and carbon hollow sphere. Among these black light-shielding substances, carbon black is preferable because it hardly affects recording properties, is stable to heat even at 150 ° C. or higher, and has excellent heat resistance and light resistance.

  Examples of classification based on carbon black materials include gas black, furnace black, channel black, anthracene black, acetylene black, ketjen carbon black, thermal black, lamp black, oil smoke, pine smoke, animal black, and vegetable black.

  Representative examples of commercially available carbon black are, for example, carbon blacks # 20 (B), # 30 (B), # 33 (B), # 40 (B), # 41 (B), # manufactured by Mitsubishi Kasei. 44 (B), # 45 (B), # 50, # 55, # 100, # 600, # 950, # 1000, # 2200 (B), # 2400 (B), MA8, MA11, MA100, etc. .

  Examples of overseas products include Cabot's BlackPearls 2,46,70,71,74,80,81,607, Regal 300,330,400,660,991, SRF-S, Vulcan 3,6, etc. Sterling 10, SO, V, S, FT-FF, MT-FF, and the like.

  Further examples include United R, BB, 15, 102, 3001, 3004, 3006, 3007, 3008, 3009, 3011, 3012, XC-3016, XC-3017, 3020, etc., manufactured by Ashland Chemical. It is not a thing.

  In these various carbon blacks, the channel black produced by bringing the gas black of natural gas or gaseous or vapor hydrocarbon gas into contact with the back of the channel steel while incompletely burning it and depositing the carbon black is colored. Although the force is large, the recordability is poor and the air is contaminated during production, which is not preferred in the present invention in terms of recordability and environmental problems.

  The carbon black preferred in the present invention is produced by continuous partial combustion in an oven at 1200 ° C. to 1700 ° C. or by pyrolysis using acetylene black and natural gas, hydrocarbon oil or a mixture thereof as raw materials. Furnace black.

  When applied to the injection-molded product of the photosensitive recording medium cartridge according to the present invention, one or more of creosote oil and ethylene bottom oil is used as a raw material oil so as not to adversely affect the recording properties of the photosensitive recording medium. As such, furnace carbon black produced by continuous partial combustion in a furnace at 1200 ° C. to 1700 ° C. or by thermal decomposition is preferable. By using such furnace carbon black, since the sulfur component is small, it is possible to reduce the adverse effect on the photosensitive recording medium.

  The sulfur component in the injection-molded product according to ASTMD 1619-60 is 0.9% or less, preferably 0.7% or less, particularly preferably 0.5% or less, and most preferably 0.1% or less. . If it is not limited to this range, the recording properties of the photosensitive recording medium such as fog increase, sensitivity abnormality, and occurrence abnormality will be adversely affected. In particular, free sulfur components that have a significant adverse effect on the recording properties of a direct photosensitive recording medium {each sample is cooled and solidified with liquid nitrogen and then ground, 100 g of this ground sample is placed in a Soxhlet extractor and extracted and cooled with chloroform at 60 ° C. for 8 hours. Then, the whole volume is made 100 ml. 10 ml of this solution is injected into a high performance liquid chromatograph, and sulfur is quantified. High-performance liquid chromatographic separation conditions are: column; ODS silica column (4.6φ × 150 mm), separation solution: methanol 95 and water 5 (containing 0.1% each of acetic acid and triethylamine), flow rate; 1 ml / min, detection wavelength; 254 nm, quantification is performed by the absolute calibration curve method. } Is 0.1% or less, preferably 0.05% or less, particularly preferably 0.01% or less. Although expensive, acetylene black having a sulfur component content of 0.1% or less is suitable for maintaining a good recording property for a high-sensitivity photosensitive recording medium having an ISO sensitivity of 100 or more.

For this purpose, selection of raw materials is important. For example, the sulfur content will be described as follows.
(Raw oil name) (Sulfur content in raw oil)
Creosote oil {coal-based raw material} 0.3-0.6%
Ethylene bottom oil {Naphtha raw material (petroleum-based raw material)} 0.05-0.1%
Ethylene bottom oil {light oil feedstock (petroleum feedstock)} 0.2-1.5%
Fluid catalytic cracking residue oil {petroleum-based raw material} 0.2-4.0%

  Accordingly, as the raw material oil, creosote oil and ethylene bottom oil made from petroleum are preferable, and carbon black produced using ethylene bottom oil made from naphtha having a sulfur content of 0.05 to 0.1% as a raw material is The sulfur content in carbon black is most preferable because it can be reduced to 0.1% by weight or less.

  As a production method, furnace carbon black produced in a furnace at 1200 ° C. to 1700 ° C., preferably 1250 ° C. to 1600 ° C., using the above raw materials is preferable.

  In particular, the free sulfur content (quantitative conforming to JIS K 6350) that has been found to have a direct adverse effect on the recording properties of the photosensitive recording medium is 100 ppm or less, preferably 50 ppm or less, particularly preferably 20 ppm or less. Most preferably, 10 ppm or less of carbon black is used. Also from the point of low free sulfur content, in the present invention, it is produced by continuous partial combustion in an oven at 1250 ° C. to 1600 ° C. using ethylene bottom oil made from naphtha or by thermal decomposition. Furnace carbon black is most preferred.

  Content of cyanide compound (especially hydrogen cyanide gas) that deteriorates recording properties (value of hydrogen cyanide determined by 4-pyridinecarboxylic acid / pyrazolone absorption analysis in terms of ppm relative to the weight of the light-shielding substance) is 20 ppm or less, preferably Is 10 ppm or less, particularly preferably 5 ppm or less, and most preferably 1 ppm or less. In the case of a photosensitive recording medium subjected to chemical sensitization such as gold sensitization, selenium sensitization, and dye sensitization, particularly gold sensitized, hydrogen cyanide gas Therefore, it is preferable to contain a hydrogen cyanide gas adsorbing substance (hereinafter referred to as a hydrogen cyanide gas-containing scavenger).

  A hydrogen cyanide gas scavenger is a compound that converts hydrogen cyanide gas into an adsorbed or photographically inert substance. The hydrogen cyanide gas scavenger should not release substances that adversely affect the silver halide photosensitive material as a result of trapping the hydrogen cyanide gas. A suitable hydrogen cyanide gas scavenger can be selected from inorganic or organic compounds of noble metals. Particularly preferred are palladium (II or IV; indicating the oxidation state; the same applies hereinafter) and platinum (II or IV) compounds. Gold (I or III) compounds are also preferred. Rhodium (III), iridium (III or IV) and osmium (II, III or IV) compounds are also effective, but higher amounts are required to obtain equivalent effects. Specific examples of useful inorganic or organic noble metal compounds are described in detail, for example, in the Gmelin Handbook, and the extent to which commercially available products, synthetic products and in situ synthetic products do not adversely affect the photosensitive recording medium. Can be used at a purity of

  Preferred palladium compounds include palladium chloride (II), palladium bromide (II), palladium hydroxide (II), palladium sulfate (II), palladium thiocyanate (II), tetrachloropalladium (II) acid salt (sodium salt) , Potassium salt, ammonium salt), hexachloropalladium (IV) acid salt, tetrabromopalladium (II) acid salt, hexapromoparadium (IV) acid salt, bis (salicylatato) paradimum (II) acid salt, bis (dithiooxalato- S, S ′) palladium (II) acid salt, trans-dichlorobis (thioether) palladium (II), tetraammine palladium (II) salt, dichlorodiammine palladium (II), dibromodiammine palladium (II), oxalatodiammine palladium (II) ), Dinitrodiammine palladium (II), bis (ethylenediamine) palladium (II) salt, dichloroe Range amine palladium (II), bis (2,2'-pipyridine) palladium (II) salt, bis (1,10-phenanthroline) palladium (II) salt, tetranitropalladium (II) acid salt, bis (glycinato) palladium (II), tetrakis (thiocyanato) palladium (II), dichlorobis (phosphine) palladium (II), dichlorobis (phosphine) palladium (II), di-μ-chloro-bis [chloro (phosphine) palladium (II )], Di-μ-chloro-bis [chloro (arsine) palladium (II)], dinitrobis (arsine) palladium (II), and the like.

  Preferred platinum compounds include platinum chloride (II), platinum chloride (IV), hexafluoroplatinum (IV), tetrachloroplatinum (II), hexachloroplatinum (IV), trichlorotrifluoroplatinum. (IV) acid salt, tetrabromoplatinum (II) acid salt, hexabromoplatinum (IV) acid salt, dibromodichloroplatinum (II) acid salt, hexahydroxoplatinum (IV) acid salt, bis (oxalato) platinum (II) acid salt Dichlorobis (oxalatoplatinum (IV), bis (thiooxalato) platinum (II), bis (acetylacetonato) platinum (II), bis (1,1,1,5,5,5-hexafluoro- 2,4-pentanedionato) platinum (II), bis (1,1,1-trifluoro-2,4-pentandionato) platinum (II), tetrakis (thiocyanato) platinum (II), hexakis ( Thiocyanato) platinum (IV) acid salt, bis {(Z) -1,2-dicyanoethylene-1,2-dithiola G} platinum (II), dichlorobis (diethylsulfide) platinum (II), tetrachlorobis (diethylsulfide) platinum (IV), bis (glycinato) platinum (II), dichloroglycinatoplatinum (II), Dichlorobis (triethylphosphine) platinum (II), chlorohydridobis (triethylphosphine) platinum (II), tetraammineplatinum (II) salt, tetrachloroplatinum (II) acid salt, dichlorodiammineplatinum (II), trichloroammineplatinum (II) ) Salt, hexaammineplatinum (IV) salt, chloropentammineplatinum (IV) salt, tetrachlorodiammineplatinum (IV), dinitrodiammineplatinum (II), dichlorotetrakis (methylamine) platinum (IV) salt, dichloro (ethylenediamine) ) Platinum (II), bis (ethylenediamine) platinum (II) salt, tris (ethylenediamine) platinum (IV) salt, dichlorobis (ethylenediamine) platinum (IV) salt , Dichlorodihydroxo (ethylenediamine) platinum (IV), tetrakis (pyrimidine) platinum (II) salt, dichlorobis (pyridine) platinum (II), bis (2,2′-pipyridine) platinum (II) salt, tetranitroplatinum (II) ) Acid salt, chlorotrinitroplatinum (II) acid salt, dichlorodinitroplatinum (II) acid salt, dibromodinitroplatinum (II) acid salt, hexanitroplatinum (IV) acid salt, chloropentanitroplatinum (IV) acid salt, Dichlorotetranitroplatinum (IV), Trichlorotrinitroplatinum (IV), Tetrachlorodinitroplatinum (IV), Dibromodichlorodinitroplatinum (IV), Trichloro (ethylene) platinum (II) , Di-μ-chloro-bis (chloro (ethylene) platinum (II), trans-dichloro (ethylene) (pyridine) platinum (II), bis [bis (β-mercaptoethylamine) nickel (II) -S, S " -Platinum (II) salt and dichlorodica Boniru platinum (II), and the like.

  Gold (I or III), rhodium (III), iridium (III or IV) and osmium (II, III or IV) compounds can be used as well, for example potassium tetrachloroaurate (III), rhodium (III) chloride, potassium hexachloroiridate (IV), potassium tetrachloroiridate (III), potassium hexachloroosmate (IV) and the like. As long as the effects of the present invention are obtained, the inorganic or organic compound of the noble metal is not limited to the specific examples described above.

  The content of the hydrogen cyanide scavenger is preferably 0.01 to 10 parts by weight, more preferably 0.02 to 8 parts by weight, particularly preferably 100 parts by weight of the rubbery polymer-containing aromatic monovinyl resin. 0.03 to 6 parts by weight, most preferably 0.04 to 5 parts by weight. When the content of the hydrogen cyanide scavenger is less than 0.01 parts by weight, the hydrogen cyanide cannot be effectively removed by adsorption. On the other hand, when the amount exceeds 10 parts by weight, the effect of increasing the amount is not exhibited and only the cost is increased. Further, the fluidity of the resin is deteriorated, a weld line (also referred to as a weld mark) is strongly generated, and the impact strength is reduced.

  Particularly preferred as carbon black is an iodine adsorption amount (measured according to JIS K 6221) related to the dispersibility, conductivity and light shielding ability of carbon black of 20 mg / g or more, preferably 30 mg / g or more, particularly preferably 50 mg / g. g, most preferably 80 mg / g or more, and dibutyl phthalate (DBP), oil absorption (measured according to JIS K 6221) is 50 ml / 100 g or more, preferably 60 mg / 100 g or more, particularly preferably 70 ml / 100 g or more, most The carbon black is preferably 100 ml / 100 g or more.

  In the present invention, furnace carbon black is preferable for the purpose of improving the light shielding property, cost, and physical properties, and various expensive conductive carbon blacks, acetylene carbon blacks, and modified by-product carbons are used as the light shielding material that is expensive but has an antistatic effect. Ketjen carbon black, which is black, is preferred. Especially for high-sensitivity (ISO sensitivity 400 or more) photosensitive recording media, acetylene black having a sulfur content of 0.1% or less and ethylene bottom oil made from naphtha are continuously used in a furnace at 1250 ° C to 1600 ° C. Furnace carbon black produced by partial combustion or thermal decomposition is preferred.

  Examples of the carbon black having an antistatic effect include various conductive carbon blacks having an average particle diameter of 12 to 50 mμ (= nm) and a DBP oil absorption of 100 ml / 100 g or more, such as acetylene black and conductive furnace black (CF). , Super conductive furnace black (SCF), extra conductive furnace black (XCF), conductive channel black (CC), furnace black or channel black heat-treated at a high temperature of about 1500 ° C., and the like. Specific examples of acetylene black include Denka Acetylene Black (manufactured by Electrochemical Co., Ltd.) and Shaunigan Acetylene Black (manufactured by Shaunigan Chemical Co., Ltd.). Specific examples of conductive furnace black include Connexex CF (Continental Carbon). Co., Ltd.), Vulcan C (manufactured by Cabot Co., Ltd.), etc. Specific examples of Super Conductive Furnace Black include Continex SCF (Continental Carbon Co., Ltd.), Vulcan SC (Cabot Co., Ltd.), etc. Specific examples of furnace black include Asahi HS-500 (manufactured by Asahi Carbon Co., Ltd.) and Vulcan XC-72 (manufactured by Cabot Co., Ltd.). Specific examples of conductive channel black include Kourax L (degg Sa Co., Ltd.) there is like, can also be used, which is a kind of furnace black Ketchen Black EC and Ketchen black EC-600JD (manufactured by Ketchen Black International Co., Ltd.).

  Of these, acetylene black, in particular, has a low content of impurities such as sulfur components and hydrogen cyanide, which adversely affect the recording properties of photosensitive recording media, and has a developed secondary structure structure, so that the recording properties and dispersion Since it is excellent in property and conductivity, it is preferably used. Further, Ketjen Black EC, Ketjen Black EC-600JD, etc., which have excellent specific surface area and show excellent conductivity even at a low filling amount, can be preferably used.

  The amount of the conductive carbon black added is preferably 0.05 to 10 parts by weight and 0.1 to 8 parts by weight with respect to 100 parts by weight of the resin component. .2 to 4 parts by weight is most preferable. If the addition amount is less than 0.05 parts by weight, the desired light-shielding property and conductivity may not be obtained. If the addition amount exceeds 10 parts by weight, the effect of increasing the amount will not be exhibited, resulting in an increase in cost. In addition, physical strength, resin fluidity, and injection moldability may deteriorate and weld lines may occur.

  In order to improve the dispersibility of carbon black or the like and improve the recording properties, it is preferable to contain a fatty acid metal salt as a dispersant. Examples of fatty acid metal salts include higher fatty acids such as lauric acid, stearic acid, succinic acid, stearyl lactic acid, lactic acid, phthalic acid, benzoic acid, hydroxystearic acid, ricinoleic acid, naphthenic acid, oleic acid, palmitic acid, erucic acid, and Li , Na, Mg, Ca, Sr, Ba, Zn, Cd, Al, Sn, Pb, Cd, and the like, and preferable examples include magnesium stearate, calcium stearate, sodium stearate, stearic acid. There are zinc, zinc oleate, magnesium oleate and the like.

  The names, molecular formulas, states and melting points of typical fatty acid metal salts commercially available are shown below.

  It is preferable to include an aliphatic alcohol fatty acid ester in the injection-molded product of the photosensitive recording medium cartridge according to the present invention. By including an aliphatic alcohol fatty acid ester, moderate slipperiness, prevention of water droplet adhesion (providing prevention) when taken out at room temperature after long-term storage in a low-temperature warehouse, imparting antistatic properties, etc. Can do.

  This fatty alcohol fatty acid ester is a compound of an aliphatic alcohol having 1 to 10 carbon atoms and a fatty acid having 10 to 20 carbon atoms. Specifically, monoglycerin oleate, polyglycerol oleate, glycerol triricino Rate, glycerin acetyl ricinolate, methyl acetyl ricinoleate, ethyl acetyl ricinolate, butyl acetyl ricinolate, propylene glycol oleate, propylene glycol laurate, pentaerythritol oleate, polyethylene glycol oleate, polypropylene glycol oleate, polyoxyethylene Glycerin, polyoxypropylene glycerin, sorbitan oleate, sorbitan laurate, polyethylene glycol sorbitan oleate, polyethylene glycol sol Tanraureto, there is polyalkylene ether polyols.

  The content of the aliphatic alcohol fatty acid ester is preferably 0.1 to 5 parts by weight, and preferably 0.2 to 4 parts by weight with respect to 100 parts by weight of the rubbery polymer-containing aromatic monovinyl resin. Is more preferably 0.3 to 3 parts by weight, and most preferably 0.4 to 2 parts by weight.

  When the content of the aliphatic alcohol fatty acid ester is less than 0.1 part by weight, effects such as slipping property and antistatic property cannot be exhibited effectively. On the other hand, when the amount exceeds 5 parts by weight, the effect of increasing the weight is hardly exhibited and only the material cost is increased.

  Depending on the type, the slip between the resin composition and the screw of the extruder increases, and a certain amount of injection cannot be secured, or the product value is reduced by bleeding out to the surface of the injection molded product over time.

  The injection-molded article of the photosensitive recording medium cartridge according to the present invention preferably contains a 1,2-polybutadiene-based thermoplastic elastomer. By including a 1,2-polybutadiene-based thermoplastic elastomer, a plurality of different types of thermoplastic resins including a rubbery polymer-containing aromatic monovinyl resin can be made compatible.

  The content of the 1,2-polybutadiene-based thermoplastic elastomer is preferably 0.05 to 100 parts by weight, more preferably 0.1 to 80 parts by weight with respect to 100 parts by weight of the rubbery polymer-containing aromatic monovinyl resin. 0.2 to 60 parts by weight is particularly preferable, and 0.5 to 40 parts by weight is most preferable.

  When the content of the 1,2-polybutadiene thermoplastic elastomer is less than 0.05 parts by weight, there is no blending effect and only the cost is increased. On the other hand, when the amount exceeds 100 parts by weight, there is no increase effect and only the material cost increases. Furthermore, problems such as insufficient rigidity also occur.

  The injection molded product of the photosensitive recording medium cartridge according to the present invention preferably contains a formaldehyde scavenger. Formaldehyde scavengers are compounds that can absorb (capture) formaldehyde by reacting with formaldehyde, and can prevent adverse effects of formaldehyde (large irritating odor, harmful to human body, worsening recordability). In particular, it is highly effective when used in combination with zeolite that adsorbs and renders aldehyde gas harmless, and even if inexpensive materials and recycled resins containing commercially available aldehydes are used, the recording performance will not be adversely affected, and odors and irritating odors may be given to the user. It is preferable because it gives no discomfort.

  Formaldehyde scavengers include polyamide resins, amide compounds, urethane compounds, ethylene / vinyl alcohol copolymers, pyridine derivatives, pyrrolidone derivatives, urea derivatives, triazine derivatives, hydrazine derivatives, organic amino compounds, imide compounds, and amidine compounds. . Specific examples include N, N-dimethylformamide, N, N-dimethylacetamide, N, N-diphenylformamide, N, N-diphenylacetamide, N, N-diphenylbenzamide, N, N, N ′, N′-tetra Methyl adipamide, oxalic acid dianilide, adipic acid dianilide, N-phenylacetanilide, nylon 6, nylon 66, nylon 66/6 binary copolymer, nylon 6/10 binary copolymer, nylon 66/10 binary Polymer, nylon 6/66 binary copolymer, nylon 6/12 binary copolymer, nylon 6/66/10 ternary copolymer, nylon 6/66/10/12 quaternary copolymer, nylon 66/66/10 terpolymers, homopolymers or copolymers of lactams such as nylon 11 and nylon 12, adipic acid, sebacic acid, deca Homopolymers or copolymers of polyamides derived from dicarboxylic acids such as dicarboxylic acids, diamic acids and diamines such as ethylenediamine, tetramethylenediamine, hexamethylenediamine, metaxylylenediamine, lactams and dicarboxylic acids and Polyamide copolymers derived from diamines, polyacrylamide, polymethacrylamide, N, N-bis (hydroxymethyl) suberamide, poly (γ-methyl glutamate), poly (γ-ethyl glutamate), poly (N-vinyl lactam) ), Amide compounds such as poly (N-vinylpyrrolidone), diisocyanates such as toluene diisocyanate and diphenylmethane diisocyanate and glycols such as 1,4-butanediol and poly (tetramethylene oxide) glycol Polyurethanes derived from polymer glycols such as polybutylene adipate and polycaprolactone, melamine, benzoguanamine, acetoguanamine, N-butylmelamine, N-phenylmelamine, N, N'-diphenylmelamine, N, N ', N' ' -Triphenylmelamine, N-methylolmelamine, N, N'-dimethylolmelamine, N, N ', N' '-trimethylolmelamine, 2,4-diamino-6-benzyloxytriazine, 2,4-diamino- 6-butoxytriazine, 2,4-diamino-6-cyclohexyltriazine, triazine derivatives such as melem, melam, N-phenylurea, N, N′-diphenylurea, thiourea, 1-hydroxyurea, 1-methylurea, 1-ethylurea, 1-acetyl-3-methylurea, 1,1-diphenylurea, 1- 4-Ethoxyphenyl) urea, methylurea, ethylurea, dimethylurea, diethylurea, ethyleneurea, guanylurea, guanylthiourea, acetylurea, propyleneurea, 5-hydroxypropyleneurea, 5-methoxypropyleneurea, 5-methylpropylene Urea derivatives such as urea, 4,5-dimethoxyethyleneurea, N-phenylthiourea, N, N′-diphenylthiourea, nonamethylenepolyurea, phenylhydrazine, diphenylhydrazine, methylhydrazine, ethylhydrazine, n-propylhydrazine, n-butylhydrazine, ethylene-1,2-dihydrazine, propylene-1,2-dihydrazine, butylene-1,4-dihydrazine, benzaldehyde hydrazine, benzaldehyde semicarbazone, benzaldehyde 1 Hydrazine derivatives such as methyl-1-phenylhydrazine, thiosemicarbazone, hydrazine of 4- (dialkylamino) benzaldehyde, succinimide, phthalimide, succinimide, hydantoin, 1-methylol-5,5-dimethylhydantoin, isocyanuric acid, etc. Imide compounds, dicyandiamide, pyrrolidine, piperidine, morpholine, guanamine, guanidine, guanidine, aminoguanidine, guanine, guanacrine, guanochlor, guanoxane, guanosine, amiloride, N-amidino-3-amino-6-chloropyrazinecarboxamide, etc. Amidine compound, poly (2-vinylpyridine), poly (2-methyl-5-vinylpyridine), poly (2-ethyl-5-vinylpyridine), 2-vinylpyridine-2- Pyridine derivatives such as methyl-5-vinylpyridine copolymer and 2-vinylpyridine-styrene copolymer. Among them, polyamides such as ternary copolymers of nylon 6/66/610, quaternary copolymers of nylon 6/66/610/12, dimer acid polyamides, melamine, guanamine, benzoguanamine, acetoguanamine, N-methylol Melamine, N, N′-dimethylolmelamine, N, N ′, N ″ -trimethylolmelamine, N-methylolbenzoguanamine, thermoplastic polyurethane resin, dicyandiamide, guanidine, poly (N-vinylpyrrolidone), poly (2- Vinylpyridine), N, N′-diphenylurea, polyurea, melem and melam are preferred.

  The content of the formaldehyde scavenger is 0.001 to 40 parts by weight, preferably 0.005 to 30 parts by weight, and 0.01 to 20 parts by weight with respect to 100 parts by weight of the rubbery polymer-containing aromatic monovinyl resin. Part is more preferable, 0.05 to 10 parts by weight is particularly preferable, and 0.1 to 5 parts by weight is most preferable. If the content is less than 0.001 part by weight, there is almost no effect of addition, and if it exceeds 40 parts by weight, the effect of increasing the amount is small and only the cost is increased.

It said zeolite is aluminosilicate having a three dimensional skeletal structure is represented by _{XM 2 / n O · Al 2} O 2 · YSiO 2 · ZH 2 O as a general formula. (M is an ion-exchangeable ion and is generally a divalent metal ion. N is the valence of the metal ion. X and Y are the coefficients of the respective metal oxides and silica. Z is the crystal water. Number.)

  Specific examples of zeolite include A-type zeolite, B-type zeolite, D-type zeolite, L-type zeolite, NA-type zeolite, PC-type zeolite, R-type zeolite, T-type zeolite, W-type zeolite, X-type zeolite, Y Type Zeolite, ZK-5 Type Zeolite, High Silica Zeolite, Hydroxycancrinite, Analcyme, Chabasite, Hojasite, Mordenite, Sodalite, Hydroxy Sodalite, Elionite, Clinobyrolite and the like. Among these, A type zeolite is preferable because it is inexpensive and has a high ability to adsorb and detoxify harmful gases (free sulfur gas, hydrogen cyanide gas, formaldehyde gas, chlorine gas, sulfurous acid gas, etc.) that adversely affect recording performance.

  In addition, the zeolite includes natural zeolite (anazeme, chabazite, heulandite, erionite, ferririte, laumnite, mordenite, etc.), synthetic zeolite (A, N-A, X, Y, hydoxy sodalite, ZK-5, B, R, D, T, L, various types of zeolites such as hydroxy, cancrinite, W, Zeolaon).

  The zeolite used in the present invention may be either natural zeolite or synthetic zeolite, but it is inexpensive, has a low impurity content that adversely affects the recording properties of the photosensitive material, and has good dispersibility. It is essential that the average particle diameter is 20 μm or less, and a synthetic zeolite of 0.1 to 10 μm is suitable, preferably 0.2 to 8 μm, more preferably 0.3 to 6 μm, particularly preferably 0.4. Synthetic zeolite of ˜5 μm, most preferably 0.5-4 μm. It is essential that the secondary average particle size by electron microscopy is 50 μm or less.

  Metal ion-containing zeolite in which metal ions are contained in zeolite is preferred. The metal ion-containing zeolite is an ion-exchangeable ion in the zeolite, for example, a part or all of sodium ion, potassium ion, etc., one kind of metal ion such as silver ion, manganese ion, nickel ion, copper ion, etc. It is substituted with the above ions.

  By using a metal ion-containing zeoleite, it can exert its action as an antibacterial agent. In particular, hydrophilic biodegradable polymers such as gelatin, polyvinyl alcohol, etc., which are water-absorbing and easily break down or biodegrade. The quality of the photosensitive recording medium using the photographic emulsion layer, the protective layer and the back layer as the components can be maintained satisfactorily for a long time.

  Among the metal ion-containing zeolites, silver ion-containing zeolite (hereinafter referred to as silver zeolite) is preferable. Silver ion is 0.01 to 30% by weight, preferably 0.05 to 25% by weight, more preferably 0.1 to 20% in the zeolite from the viewpoint of improved recording properties (detoxification of sulfur compounds) and antibacterial properties. % By weight, particularly preferably 0.5 to 15% by weight, most preferably 1 to 10% by weight. When the silver ion content is less than 0.01% by weight, there is no effect of inclusion, and only the production cost increases. Even if the content exceeds 30% by weight, there is no increase effect, only an increase in material cost and production cost.

  Further, a zeolite containing a total of two or more metal ions of silver ions and at least one metal ion selected from the group consisting of manganese, nickel and copper is particularly preferable. By using such a zeolite containing two or more kinds of metal ions, various recording harmful compounds contained in the atmosphere (for example, gases such as formaldehyde, chlorine, hydrogen chloride, hydrogen sulfide, sulfurous acid, hydrogen cyanide, etc.) The photosensitive material, which is an ultra-fine chemical product, can be maintained for a long period (two years or more) in a good quality state. The content of at least one metal ion selected from the group consisting of manganese, nickel and copper is 0.01 to 15% by weight, preferably 0.05 to 13% by weight, more preferably 0.1 to 11% by weight. Particularly preferred is 0.5 to 9% by weight, and most preferred is 1 to 7% by weight.

  Accordingly, a zeolite having a high milliexchange (hereinafter referred to as meq) having an ion exchange capacity that can be exchanged with one or more metal ions in silver ions, manganese ions, nickel ions, and copper ions is preferable. In particular, an aluminosilicate of A-type zeolite crystal having an ion exchange capacity of 2 meq / g or more is preferable. Exemplifying the ion exchange capacity (meq = milli equivalent) of zeolite of 2 meq or more, leader light is 11.5 meq / g, A type zeolite is 7 meq / g, T type zeolite is 3.5 meq / g, X type zeolite Is 6.5 meq / g, Y-type zeolite is 5 meq / g, Analthym 5 meq / g, Chabasite 5 meq / g, Erionite is 4 meq / g, Mordenite 2.5 meq / g, and Clinobutyllite is 2.5 meq / g is there.

  Among these, the most preferred zeolite is leader light having an ion exchange capacity of 5 meq / g or more, A-type zeolite, T-type zeolite, X-type zeolite, Y-type zeolite, analcite, and chabazite.

  Most preferred zeolite is cheap, easy to manufacture, easy to obtain, and has the ability to adsorb and detoxify harmful gases such as sulfur compound gas, free sulfur gas, aldehyde compound gas such as formaldehyde gas, cyanide gas, etc. Is a type A zeolite having a large metal ion exchange capacity (7 meq / g).

  The production of the zeolite containing silver ions used in the present invention is carried out by bringing the zeolite into contact with a mixed aqueous solution containing silver ions prepared in advance and, if necessary, metal ions such as manganese ions, nickel ions, copper ions, etc. An ion exchangeable ion such as an ion is replaced with the metal ion. The contact is performed at a temperature of 10 to 100 ° C., preferably 20 to 90 ° C., more preferably 30 to 80 ° C., particularly preferably 35 to 70 ° C., most preferably 40 to 60 ° C. for 1 to 28 hours, preferably It is performed for 2 to 26 hours, more preferably 4 to 24 hours, and most preferably 6 to 22 hours, by a batch system or a continuous system.

  The mixed aqueous solution is adjusted to have a pH of 3 to 10, preferably 4 to 9, particularly preferably 5 to 8. By adjusting the pH in this manner, precipitation of silver oxide or the like on the zeolite surface or in the pores can be prevented. Each metal ion in the mixed aqueous solution is supplied as a salt. For example, silver ions are supplied as silver nitrate, silver acetate, silver sulfate, silver perchlorate, etc., manganese ions are supplied as manganese nitrate, manganese sulfate, manganese acetate, etc., and nickel ions are nickel nitrate, nickel perchlorate, acetic acid. It is supplied as nickel or the like, and copper ions are supplied as copper nitrate, copper acetate, copper sulfate, copper perchlorate or the like. The zeolite after the ion exchange is sufficiently washed and then dried at 120 to 500 ° C. under normal pressure or 100 to 300 ° C. under reduced pressure (1 to 50 torr) so that the water content is 15% or less.

  The water content of the zeolite and / or metal ion-containing zeolite is 15% or less, preferably 13% or less, more preferably 11% or less, particularly preferably 9% or less, and most preferably 7% or less. If it exceeds 15%, molding failures frequently occur. The content of the metal ion-containing zeolite and / or zeolite in the injection-molded product is 0.1 to 40% by weight, preferably 0.2 to 35% by weight, more preferably 0.4 to 30% by weight, particularly preferably. 0.8 to 25% by weight, most preferably 1.5 to 20% by weight. If the content is less than 0.1% by weight, the effect of addition is small and the kneading cost increases, and if it exceeds 40% by weight, there is no effect of increasing the amount and the material cost increases.

  The injection-molded product of the photosensitive recording medium cartridge according to the present invention preferably contains an anti-aging agent. By containing an anti-aging agent, it is possible to prevent aging of the thermoplastic resin used, such as a rubbery polymer-containing aromatic monovinyl resin.

  The injection-molded product of the photosensitive recording medium cartridge of the present invention contains 0.001 to 10 parts by weight of an anti-aging agent based on 100 parts by weight of a thermoplastic resin such as a rubbery polymer-containing aromatic monovinyl resin. Preferably, it is contained in an amount of 0.005 to 8 parts by weight, more preferably 0.01 to 6 parts by weight, particularly preferably 0.02 to 4 parts by weight, and most preferably 0.03 to 2 parts by weight.

  When the content of the anti-aging agent is less than 0.001 part by weight with respect to 100 parts by weight of the thermoplastic resin, a sufficient anti-aging effect is not given, and the thermoplastic resin (however, excluding the thermoplastic elastomer) is 100 parts by weight. If it exceeds 10 parts by weight with respect to parts, vulcanization hindrance and significant bleed out will occur in the composition.

  Anti-aging agents include naphthylamines such as phenyl-β-naphthylamine, N, N′-diphenylethylenediamine, dialkyldiphenylamine, N, N′-diphenyl-p-phenylenediamine, N-phenyl-N′-isopropyl-p- Diphenylamines such as phenylenediamine, p-phenylenediamines such as N, N′-diphenyl-p-phenylenediamine, 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinaline, poly (2, Hydroquinone derivatives such as 2,4-trimethyl-1,2-dihydroquinoline and 6-ethoxy-1,2-dihydro-2,2,4-trimethylquinoline, 2,6-di-t-butyl-4-methylphenol Monophenol type, 2,2′-methylene-bis- (4-ethyl-6-tert-butylphenol), 2,2 Polyphenols such as' -methylene-bis- (4-methyl-6-tert-butylphenol), 4,4'-butylidene-bis- (6-tert-butyl-3-methylphenol), 4,4'-thiobis There are thiobisphenols such as-(6-t-butyl-3-methylphenol), 2-mercaptobenzimidazole, zinc salt of 2-mercaptobenzimidazole, 2-mercaptomethylbenzimidazole, etc. It is arbitrarily blended depending on the case.

  In addition, various antioxidants disclosed in pages 794 to 799 of the Handbook of Antioxidants (KK Taiseisha, published on October 25, 1976) and the Plastic Data Handbook (issued on April 5, 1984) Various antioxidants disclosed on pages 327 to 329 of the Plastic Additive Data Collection (published by KK Chemical Industry Co., Ltd.) and disclosed on pages 211 to 212 of PLASTICSAGE ENCYCLOPEDIA Advancement, 1986 (published by KK Plastic Age) It is preferable to use various antioxidants together with an anti-aging agent because the effect of preventing thermal deterioration and thermal decomposition can be increased to prevent a decrease in physical strength and the generation of substances that adversely affect recording properties can be prevented.

  Among the antioxidants that are preferably used together with the above-mentioned antioxidants, hindered phenol-based antioxidants are preferable, and typical examples of the hindered phenol-based antioxidants are shown below.

  1,3,5-trimethyl 2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, tetrakis [methylene-3- (3 ′ · 5′-di-tert-butyl -4'-hydroxyphenyl) propionate] methane, octadecyl-3,5-di-tert-butyl-4-hydroxy-hydrocinnamate, 2,2 ', 2'-tris [(3,5-di-tert- (Butyl-4-hydroxyphenyl) propionyloxy] ethyl isocyanurate, 1,3,5-tris (4-tert-butyl-3-hydroxy-2,6-di-methylbenzyl) isocyanurate, tetrakis (2,4- (Di-tert-butylphenyl) 4,4′-biphenylene diphosphite, 4,4′-thiobis- (6-tert-butyl-O-cresol), 2,2′-thiobis- ( -Tert-butyl-4-methylphenol), tris- (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 2,2'-methylene-bis- (4-methyl-6-tert-butylphenol) ) 4,4′-methylene-bis- (2,6-di-tert-butylphenol), 4,4′-butylidenebis- (3-methyl-6-tert-butylphenol), 4-hydroxymethyl-2, 6-di-tert-butylphenol, 2,6-di-tert-4-n-butylphenol, 2,6-bis (2′-hydroxy-3′-tert-butyl-5′-methylpentyl) -4-methylphenol 4,4′-methylene-bis- (6-tert-butyl-O-cresol), 4,4′-butylidene-bis (6-tert-butyl-m-cresol), 3,9-bi {1,1-dimethyl-2- [β- (3-t-butyl-4-hydroxy-5-methylphenyl) propionyloxy] ethyl} 2,4 · 8,10-tetraoxaspiro [5,5] Undecane.

  Among these, those having a melting point of 100 ° C. or higher, particularly 120 ° C. or higher are preferable. It is also effective to use it together with a phosphorus antioxidant. Furthermore, it is possible to improve recording properties by using a total of at least one of phosphorous antioxidants, at least one of hindered phenolic antioxidants, and at least one of hydrotalcite compounds in combination. It is particularly preferable from the viewpoint of preventing thermal deterioration and thermal decomposition of resins and additives and rust-proofing the molding machine.

  The total content of the antioxidant is preferably 0.001 to 5 parts by weight, preferably 0.005 to 4 parts by weight, and 0.01 to 3 parts by weight with respect to 100 parts by weight of the rubbery polymer-containing aromatic monovinyl resin. Is more preferable, 0.02 to 2 parts by weight is particularly preferable, and 0.03 to 1 part by weight is most preferable.

  When the content of the antioxidant is less than 0.001 part by weight, a sufficient antioxidant effect cannot be obtained and only the kneading cost is increased. On the other hand, when the amount exceeds 5 parts by weight, the effect of increasing the weight is not exhibited and only the material cost is increased. Furthermore, white smoke and bad odor are often generated during injection molding, which adversely affects the recording properties of the photosensitive recording medium.

  Various substances can be added as the light-shielding substance to be added to the plastic that forms the first shell 25 and the second shell 26. For example, 0.01 to 5. It is preferable to add 00% by weight. For example, carbon black can be used as the light-shielding substance. By adding this carbon black, the light shielding property can be secured and the physical strength can be improved. The amount of carbon black added is preferably 0.01 to 2.00% by weight. If the added amount exceeds 0.01% by weight, the effect of improving the light-shielding property and the physical strength is exhibited, but if the added amount exceeds 2.00% by weight, the physical strength is lowered.

  As the lubricant, for example, a silicone-based lubricant can be used. Since the friction resistance is reduced by the addition of the silicone lubricant, the generation of shavings due to the movement of the shutter 15 can be reduced. In addition, the generation of shavings when the recording disk 14 and the inner wall of the cartridge main body 11 come into contact with each other during transportation can be reduced. Furthermore, since the handleability such as insertability into equipment is improved and the fluidity is improved, the kneadability during molding and the workability such as injection moldability are also improved.

  The addition amount of the silicone lubricant is preferably 0.1 to 3.0% by weight. Less than 0.1% by weight is less effective, and more than 3.0% by weight results in too good fluidity, resulting in slippage between the screw and resin during kneading and molding, resulting in poor workability and bleeding out on the product surface. This is because it may adhere to the recording disk 4 or the user's hand and cause problems in handling and appearance. In addition, when using copolymer silicone, since the said malfunction becomes difficult to produce, it is possible to add to 5.0 weight%.

Next, examples of the present invention will be described.
The thermoplastics used to mold the first and second shells are PC, PBT, ABS, POM, PS, PP, HDPE, PA, PET, PPS, SAN (styrene-acrylonitrile copolymer), PMMA, PC, etc. Can be used. In addition, in order to prevent erroneous welding due to ultrasonic welding, parts other than the first shell and the second shell are selected from the thermoplastic plastics different from those used for the first shell and the second shell. Good.

  For the first shell and the second shell, a light-shielding plastic having a visible light transmittance of 1.0% or less at a thickness of 0.2 mm is used. It is preferable to form in the range of 2-1.6 mm. In order to obtain a plastic having the above light-shielding characteristics, a light-shielding substance may be added. Various materials can be used as the light shielding material, and it is preferable to add 0.01 to 5.00% by weight depending on the light shielding material to be used. The following may be considered as the light shielding material.

(1) Inorganic compound A, oxide: silica, diatomaceous earth, alumina, titanium oxide, iron oxide (iron black), zinc oxide, magnesium oxide, antimony oxide, barium ferrite, strontium ferrite, beryllium oxide, pumice, pumice balloon A, alumina fiber, etc. B, hydroxide ... aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, etc. C, carbonate ... calcium carbonate, magnesium carbonate, dolomite, dosonite etc. D, (sulfur) sulfate ... calcium sulfate , Barium sulfate, ammonium sulfate, calcium sulfite, etc. E, silicate ... talc, clay, mica, asbestos, glass fiber, glass balloon, glass beads, calcium silicate, montmorillonite, bentonite, etc. F, carbon ... carbon black, graphite, carbon Fiber, carbon hollow sphere etc. G, its Other ... Iron powder, copper powder, lead powder, aluminum powder, molybdenum sulfide, poron fiber, silicon carbide fiber, brass fiber, potassium titanate, lead zirconate titanate, zinc borate, barium metaborate, calcium borate, boron Sodium acid, aluminum paste, talc, etc.

(2) Organic compound wood flour (pine, firewood, sawtooth, etc.), cereal fiber (almond, beannut, fir etc.), cotton, jute, paper strip, non-wood fiber (wara, kenaf, bamboo, esparto, pagas, Morohaya, fireworks, etc.), cellophane pieces, nylon fiber, polypropylene fiber, starch (including modified starch, surface-treated starch), aromatic polyamide fiber, etc.

  Among these light-shielding substances, inorganic compounds that are less likely to adversely affect recording properties and are heat-stable and opaque even at 150 ° C. or higher are preferable. Particularly, substances that have excellent heat resistance and light resistance and are relatively inert. The light-absorbing carbon black, titanium nitride, graphite and iron black are preferred.

  When carbon black is used as the light-shielding substance, the amount added is preferably 0.01 to 2.00% by weight. As described above, this is to obtain a plastic having a good balance between light shielding properties and physical strength.

  Examples of classification based on carbon black materials include gas black, furnace black, channel black, anthracene black, acetylene black, ketjen carbon black, thermal black, lamp black, oil smoke, pine smoke, animal black, and vegetable black.

  As typical examples of commercially available carbon black, for example, carbon black # 20 (b), # 30 (b), # 33 (b), # 40 (b), # 41 (b), manufactured by Mitsubishi Kasei # 44 (b), # 45 (b), # 50, # 100, # 600, # 950, # 1000, # 2200 (b), # 2400 (b), MA8, MA11, MA100 and the like. Also, various grades such as Denka Black made by Electrochemical, Seaweed of Tokai Carbon, Asahi Carbon Asahi # 78, Showa Cabot Showa Black, Nippon Steel Chemical Niteron, Mitsubishi Chemical Diamond Black, etc. can be used.

  Examples of overseas products include Cabot's B1ack Pear1s 2,46,70,71, 74,80,81,607, etc., Rega1300,330,400,660,991, SRF-S, etc., Vulcan3,6 etc., Ster1ing10, SO, V, S, Examples include FT-FF and MT-FF. Furthermore, UnitedR, BB, 15,102,3001,3004,3006,3007,3008,3009,3011,3012, XC-3016, XC-3017,3020, etc. of Ashland Chemical Co. can be mentioned. It is not limited to.

  In addition, as a lubricant to be added to the first shell and the second shell, silicone-based lubricants, particularly various grades of dimethylpolyoxane can be used. Toray, Dow Corning, Silicone, GE Toshiba Silicone, Asahi Kasei Various grades commercially available from Wacker Silicone, Shin-Etsu Chemical, etc. can be used. Both master batches and kneaded products can be used. The addition amount of the silicone lubricant is preferably 0.1 to 5.0% by weight. As described above, this is to obtain a plastic having a good balance between frictional resistance, manufacturing suitability, and product quality.

  Further, as the rough surface provided on the shell, if the surface roughness Ra is 5 μm or less, the light diffusion effect is thin, and if it is 20 μm or more, there is a possibility that scratches may be generated when contacting the recording disk. Therefore, mat processing or surface processing with a surface roughness Ra; 5 to 20 μm is preferable.

  The aluminum alloy used for the light shielding plate 30 and the shutter member 55 is preferably an A1-Mg alloy, for example, JIS alloy numbers 5052 and 5056 are preferable. In order to increase the strength, JIS alloy numbers 5083 and 5086 are more preferable. Furthermore, when increasing the strength, A1-Mg-Si alloy (for example, JIS alloy number 6063, 6061), Al-Cu alloy (for example, JIS alloy number 2014, 2017), A1-Zn-Mg system An alloy (for example, JIS alloy number 7003, 7N01, 7075, 7050) or the like may be used. In light of weight reduction and ease of processing, the thickness of the light shielding plate 30 and the shutter member 55 is preferably 1.0 mm or less, and more preferably 0.15 to 0.5 mm.

  Further, the light shielding plate 30 and the shutter member 55 may be formed of plastic. As the plastic to be used, for example, POM or the like is suitable, and it is preferable to add a light-shielding substance or a lubricant as in the case of the first shell described above.

  For the shutter spring and the lock spring, it is preferable to use austenitic spring stainless steel from the viewpoint of spring constant, durability, workability, etc. For example, SUS300 series can be used. The preferred wire diameter is preferably 0.2 to 0.7 mm for the shutter spring and 0.15 to 0.4 mm for the lock spring.

  Further, although ultrasonic welding is used for fixing the first shell and the second shell, other welding methods and fixing methods may be used. For example, when fixing with a screw or the like, it is preferable to form a light shielding structure around the screw hole. Moreover, although the 2nd shell and the 1st shell were comprised by one component, you may form combining several components. For example, if it is configured with two parts with the shutter housing portion as a boundary, the mold can be simplified.

In addition, this invention is not limited to embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.
For example, a cartridge containing a recording disk capable of recording on both sides is taken out as an example, but it may correspond to a recording disk recorded on one side. In this case, an opening is formed only on one surface, and this opening is opened and closed with a shutter. Further, although the cartridge for accommodating the hologram recording medium has been described as an example, the present invention can be applied to a cartridge for accommodating other photosensitive recording media.

It is a perspective view which shows the external appearance shape of the cartridge which implemented this invention. It is an external appearance perspective view which shows the surface on the opposite side of a cartridge. It is an external appearance perspective view which shows the shutter open state of a cartridge. It is a disassembled perspective view which shows the structure of a cartridge.

Explanation of symbols

10 Cartridge (cartridge for photosensitive recording medium)
11 Cartridge body 14 Recording disk (photosensitive recording medium, hologram recording medium)
15 Shutter 25 First shell 26 Second shell 30 Light-shielding plate

Claims (6)

An opening provided in at least one of the first shell formed in a substantially plate shape, the second shell joined so as to overlap the first shell, and the first shell and the second shell; A cartridge for photosensitive recording medium, comprising: a shutter that opens and closes; and a disc-shaped photosensitive recording medium rotatably accommodated in a cartridge body that is a combination of the first shell and the second shell,
The cartridge body has a melt flow rate (G condition of ASTM D 1238) of 2 to 40 g / 10 min, a flexural modulus (JIS K 7203) of 18,000 kg / cm ² or more, a molecular weight distribution of 5 or less, and a rubber 0.1 to 10 parts by weight of a silicone resin with respect to 100 parts by weight of a rubbery polymer-containing aromatic monovinyl resin containing 1 to 40% by weight of a polymer, and the surface reflection gloss is 45% or less A cartridge for a photosensitive recording medium, characterized by comprising an injection molded product.   The rubbery polymer is one or a mixture of two or more selected from polybutadiene rubber, butadiene-styrene random copolymer rubber, and acrylonitrile-butadiene copolymer rubber. Cartridge for photosensitive recording medium.   The photosensitive recording medium cartridge according to claim 1, wherein the silicone resin is a silicone-based oil having a viscosity of 5,000 to 50,000 centistokes at 25 ° C.   The rubbery polymer-containing aromatic monovinyl resin is composed of 20 to 50 parts by weight of a rubbery polymer-containing ABS resin and 80 to 50 parts by weight of the aromatic monovinyl resin, and the rubbery polymer-containing aromatic monovinyl resin 100. The photosensitive recording medium cartridge according to claim 1, further comprising 0.001 to 20 parts by weight of a hydrogen cyanide gas adsorbing substance that adsorbs and holds hydrogen cyanide gas with respect to parts by weight.   2. The cartridge for photosensitive recording medium according to claim 1, wherein 0.1 to 5 parts by weight of an aliphatic alcohol fatty acid ester is contained per 100 parts by weight of the rubbery polymer-containing aromatic monovinyl resin. . The cartridge according to claim 1, wherein the photosensitive recording medium is a hologram recording medium.

Images