JPH04214552A - Magazine for photographic sensitive material - Google Patents

Abstract

PURPOSE:To prevent static marks from appearing by using a pile having such filament the cross section of which has a flat area and recessed area, and depositing or incorporating polyorg. siloxane and/or its modified compd. on the filament. CONSTITUTION:Light shielding members 5a, 5b consisting of piles and base cloth are adhered to an entrance/exit port 3 for a photographic sensitive material 2. This pile has such a filament having a flat area and recessed area in a part of its cross section and polyorg. siloxane and/or its modified compd. is incorporated or deposited thereto. It is preferable that the fiber for the base cloth used for the light shielding members 5a, 5b is a synthetic fiber consisting of a thermoplastic resin. As for the pile, synthetic fiber is preferable because of its low moisture content and excellent physical properties compared to natural fiber. Thereby, generation of static electricity is suppressed.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a magazine for photographic light-sensitive materials having a light-shielding member, and more specifically, a magazine for photographic light-sensitive materials having an improved light-shielding member having a pile attached to the entrance/exit portion of the photographic light-sensitive material of the magazine body. Regarding.

0002

BACKGROUND OF THE INVENTION At present, photographic materials are used in various magazines for photographic materials so that they can be handled in well-lit places except for exposure and development processes. The most commonly known magazine for photographic materials is the cartridge for 135 size film. As shown in FIG. 1, this 135 size film cartridge has one end attached to the shaft of a spool shaft 1, and a film 2 wound into a cylindrical shape with the emulsion side facing inside, and the other end attached to the film entrance/exit section 3. exposed to the outside. The magazine outer cylinder 4 of this cartridge has a cylindrical shape made of plastic or metal plate, and the film entrance/exit part 3 is formed by the mating portions of both ends thereof. Light shielding members 5a and 5b are attached to the film entrance/exit portion 3 to prevent light from entering the magazine outer cylinder 4, and the film cartridge loaded in the camera pulls out the film 2 to take a picture, and the picture is taken. The film 2 is then rewound into the film cartridge, taken out from the camera, and developed.

Other magazines for photographic materials include film cartridges, which were published in Japanese Patent Application Laid-Open No. 62-235.
No. 946, No. 62-23040, Utility Model Application No. 62-572
It is also used in wide-width photographic materials such as those described in No. 55 and JP-A No. 60-156058. FIG. 2 shows a typical example.

[0004] In FIG. 2, a package main body 21 includes an inner body 2.
2 and an exterior body 23 that encloses the interior body 22. It has support members 25 and 26 that can support both ends of the winding tube 24 of the film 2, and these support members 25 and 26 rotatably support a disc-shaped piece of laminated cardboard. However, the material does not need to be limited, and the film 2
It may be fixed as long as it does not make the pull-out load unnecessarily large. The package body 21 is provided with an outlet 27 for the film 2, and the outlet 27 is provided with a light shielding means 28. Next, the light shielding means 28 will be explained. Passage forming members 29a and 29b for passing the film 2 are installed facing each other on the inner surface of the outlet 27.
Shade cloths 30a and 30b are attached to opposing surfaces of the passage forming members 29a and 29b to prevent external light from entering. It is preferable for the passage forming members 29a and 29b to be formed obliquely as shown in the figure from the viewpoint of light shielding.
, 29b are preferably reinforced to prevent deformation due to the working method. Normally, the tip of the film 2 is the outlet 2
7, and preparations for exposure are being made.

[0005] Normally, the film entrance/exit section of a magazine for photographic light-sensitive materials is: (1) to prevent light from entering the inside of the magazine, (2) to facilitate loading and unloading of photosensitive materials, and (2) to open the back surface of the film when loading and unloading photosensitive materials. A light-shielding member with pile is attached to prevent the surface from being scratched.

[0006] In recent years, with the spread of high-speed automatic winding and rewinding cameras, static electricity generated by contact between the film and the light-shielding member attached to the opening of the magazine for photographic light-sensitive materials is discharged when the camera is operated. However, a problem has arisen in that only the discharge area is exposed to light, and various contaminants such as dendritic, cloud-like, and cotton-like contaminants may appear during the development process. (Hereinafter, these contaminated areas are referred to as "static marks.") In order to improve the troubles caused by static electricity charging and discharging, Japanese Patent Publication No. 62-40696 discloses that a cotton-like polymer containing an inorganic conductive substance is used. A technique using conductive fibers dispersed in a striped manner in a fiber-forming polymer is reported, and Japanese Utility Model Publication No. 46-28218 reports a technique using conductive fibers with a conductive film formed on the surface of chemical fibers. . In addition, Japanese Patent Application No. 63-245808 describes technology using composite fibers, Japanese Patent Application Laid-open No. 62-286041,
No. 6042 describes techniques using various antistatic agents. However, it has not been possible to completely prevent static marks only by the static neutralizing effect of the conventional corona discharge of conductive fibers.

[0007] Further, improvements have been made to the film itself in order to reduce as much as possible the electrostatic charge caused by contact with a light-shielding member. For example, the film may be subjected to antistatic treatment, an antistatic layer may be provided on the back surface of the film, or the slipperiness may be improved.

[0008]

[Problems to be Solved by the Invention] However, as a recent trend in film, for example,
0, ISO 3200, etc., and those with even higher quality are now being sought after. Furthermore, for the purpose of improving mechanical strength and dimensional stability, polyester films, which have excellent mechanical strength and dimensional stability but tend to generate static electricity, have come to be used as the base of photosensitive materials. Therefore, when a camera having an automatic winding and rewinding mechanism is used, it is no longer possible to prevent static marks from occurring during high-speed photography using only the conventional means for preventing static electricity on the film.

The present invention has been made in view of the above points, and an object of the present invention is to impart smoothness to the pile constituting the light-shielding member and increase the contact area during high-speed photographing and high-speed storage of photographic materials. It is an object of the present invention to provide a magazine for photographic materials that can suppress the generation of static electricity and prevent the generation of static marks by reducing the frictional force with the film.

0010

[Means for Solving the Problems] The above-mentioned object of the present invention is to provide a magazine for photographic material in which a light-shielding member having a base cloth and a pile is attached to an entrance/exit portion of the photographic light-sensitive material, wherein the pile is attached to a flat portion and/or a photosensitive material magazine. Alternatively, the present invention can be achieved by a magazine for photographic materials, which has a filament having a cross-sectional shape that includes at least a portion of a concave portion, and contains or adheres to polyorganosiloxane and/or a modified product thereof.

The present invention will be explained in more detail below.

[0012] The base fabric yarn used in the light shielding member according to the present invention is preferably a synthetic fiber made of a thermoplastic resin. Examples of thermoplastic resins include polyethylene, polypropylene,
Polyolefins such as vinyl chloride and polystyrene, polyamides such as nylon 6, nylon 66, and nylon 12, polyesters such as polyethylene terephthalate and polybutylene phthalate, polyvinyl alcohol, polyvinylidene chloride, polyvinyl chloride, and polyacrylonitrile. , polycyanide vinylidene type, polyfluoroethylene type, polyurethane type, etc. Although two or more of the above thermoplastic resins may be used in combination, thermoplastic resins having fiber-forming properties are particularly preferred.

Regarding the pile constituting the light-shielding member according to the present invention, (1) it is preferable to store the photographic light-sensitive material in a low-moisture state; (2) the pile is not formed during the manufacturing process of the light-shielding member or when attaching the light-shielding member to the magazine; Considering that mechanical strength is required, it is preferable to use synthetic fibers, which have lower water content and superior physical properties than natural fibers. The synthetic fiber used for the pile yarn is preferably a thermoplastic resin similar to that used for the base fabric yarn. In the present invention, the pile yarn is usually a bundle of several tens of single fibers (hereinafter sometimes referred to as "filaments"), and the tip of the pile yarn, that is, the part where the pile contacts the film, is a single fiber. Each fiber is broken up into pieces.

[0014] In order to increase the contact area between the pile and the film constituting the light-shielding member and disperse the frictional force, the pile density is increased and as many filaments as thin as possible are used, and the pile is used in a collapsed state. However, using a large number of thin filaments leads to high costs, the filaments break easily and production stability cannot be expected, and when used with the pile collapsed, the pile height It was difficult to keep the light constant, and as a result, there were drawbacks such as incomplete light shielding. In the present invention, the pile constituting the light shielding member has a filament having a cross-sectional shape that includes at least a portion of a flat portion and/or a recessed portion.

In the present invention, it is preferable that the filaments of the napped fibers contain a smoothing agent by mixing or copolymerizing them, or that the piles are treated with a resin and attached thereto. Generally, smoothing agents include polyalkylene ethers, esters or their metal salts, fluorine compounds, etc., but in the present invention, at least polyorganosiloxanes are used which have no adverse effects on photosensitive materials and have excellent processability. The polyorganosiloxane is not particularly limited as long as it has the following basic skeleton structure, but it is mainly composed of dimethylpolysiloxane and the methyl group is an alkyl group (for example, one having 1 to 12 carbon atoms) or an aryl group. Substituted ones are preferred. In order to improve processability and heat resistance, it may have an amino group, epoxy group, hydroxyl group, alkoxy group, carboxyl group, etc. in the side chain or terminal. However, when resin-processing and adhering to the pile, it is necessary to select the resin in consideration of water dispersibility, film-forming properties, film strength, and solvent resistance. For example, amino-modified silicone,
Epoxy-modified silicones, polydiorganosiloxane diols having hydroxyl groups in side chains, or those having unsaturated bonds are preferred because they are easily crosslinked by heating. The amount of smoothing agent used is 0.1 when included in fibers.
It is preferably 1% by weight, and preferably 0.1% to 3% by weight when resin-processed and attached to the pile. By using a smoothing agent, the coefficient of friction can be reduced to 80% or less of that without additives.

The smoothness of fibers is evaluated by the coefficient of friction measured as follows. The sample (filament) was thoroughly washed with a benzene/methanol (1/1) mixture and heated to 1
The one heat-treated at 20°C for 20 minutes is used. As the friction body, a round rod with a diameter of about 1 cm is used, which is wrapped with a film and bonded to it. 1 while keeping the thread in 180° contact with the film.
The tension T1 on the front and back of the friction body is made to run at a speed of 5 cm/sec,
Measure T2 (adjust T1 to 10 g using a tension regulator). The friction coefficient is calculated using the following equation (1).

[0017]

##EQU00001## The pile yarn preferably contains 0.1% by weight or more of antistatic fibers or conductive composite fibers with an electrical specific resistance of 1010 Ω·cm or less. If the mixing ratio of antistatic fibers or conductive composite fibers with an electrical specific resistance of 1010 Ω·cm or less is less than 0.1% by weight, static electricity will not be sufficiently removed or discharged. Antistatic fibers or conductive composite fibers with an electrical specific resistance of 1010 Ω·cm or less can be obtained by mixing, adsorbing, or adhering an antistatic compound and/or a conductive substance to the above-mentioned thermoplastic resin, for example, by a commonly known method. or by copolymerizing an antistatic compound with the above-mentioned thermoplastic resin. The electric specific resistance of the fiber is 25℃, 43%R
．． H. Measurement is performed by applying a DC voltage of 1000V.

As the above-mentioned antistatic compound, known antistatic compounds having hydrophilicity or surface activity as described in "Practical Handbook of Additives for Plastics and Rubber" published by Kagaku Kogyosha in 1972 can be used. . For example, alkyl ether ester type, alkyl amine type, phosphate ester type,
Examples include alkyl ether type. The blending amount or copolymerization amount is usually 0.2 to 6% by weight, resulting in a thermoplastic resin having an electrical resistivity of 10 6 to 10 10 Ω·cm.

As the conductive substance, known conductive carbon black, metal/conductive metal oxide/metal compound,
Alternatively, particles having these films may be mentioned. The particle diameter of the particles having the film is usually 2 μm or less, and preferably 0.5 μm or less in order to prevent damage to the photosensitive material. The amount of the conductive substance used when mixed with the antistatic compound is usually 3 to 45% by weight for carbon black, and the amount of the conductive substance used when mixing with the antistatic compound is usually 3 to 45% by weight.
For metal compounds and the like, it is usually 10 to 85% by weight. When imparting electrical conductivity to a thermoplastic resin and eliminating static charges by corona discharge, that is, imparting an electrical resistivity of less than 106 Ωcm, the blending amount of the electrically conductive substance is 10 to 45% by weight for carbon black. , preferably 15-40% by weight
For metals, conductive metal oxides, metal compounds, etc., it is 30 to 85% by weight, preferably 50 to 80% by weight. When imparting electrical conductivity, moldability and physical properties deteriorate if the fiber is imparted as it is, so it is preferable to use it in the form of a composite fiber bonded with a non-conductive protective component resin.

Furthermore, 30% by weight or more of the pile used in the present invention is a filament having a flat section and/or a concave section and containing or adhering polyorganosiloxane and/or a modified product thereof. It is preferable. Here, the flat part means a circumscribed circle radius of 1 in the cross section of the fiber.
．． It refers to a portion of the outer periphery that has a radius of curvature that is 5 times or more (preferably 2.0 times or more). Fibers having such a shape can be obtained by using a known die having an irregular cross section in a spinning method such as melt spinning, wet spinning, or dry spinning. For example, T
Figure 3-A and Figure 3-F are created by a letter-shaped base, Figure 3-C is created by a rectangular base, and Figure 3- is created by two adjacent circular bases.
It can be manufactured by spinning into a desired cross-sectional shape as shown in FIG. 3-E using D and Y-shaped spinnerets, and then stretching. A plurality of composite fibers made of a conductive thermoplastic resin 91 and a non-conductive protective resin 92 (preferably using a thermoplastic resin with antistatic properties) as shown in FIG. It is spun by using a die that splices and discharges the polymers. For example, as shown in Figure 3-H, thermoplastic resin (101) with an electrical specific resistance of 1010 Ω・cm or less
and thermoplastic resin 10 that is easily decomposed or dissolved in a solvent.
After first spinning a composite fiber with a circular cross section in which the thermoplastic resin 102 is joined to the composite fiber 102, the thermoplastic resin 102 is decomposed or dissolved using a solvent and removed, thereby obtaining a fiber having concave portions and/or flat portions. can.

In the present invention, it is preferable that 30% by weight or more of the pile is composed of such specific fibers, and more preferably 50% by weight or more of the pile is composed of such specific fibers. This can reduce the frictional force of the pile in contact with the film and greatly reduce the frictional charge.

[0022] The light shielding member having piles according to the present invention includes:
For example, Japanese Patent Application Publication No. 62-27734, Japanese Patent Application No. 60-267
No. 000, Japanese Unexamined Patent Publication No. 62-201432, Utility Model Application No. 59-
No. 104143, No. 51-127737, No. 57-3
No. 2948, No. 45-86944, JP-A-60-20
No. 8751, No. 54-36923, No. 53-1052
It is manufactured by the method described in No. 22, etc. or,
The tips of the base fabric/pile threads and the surface of the light shielding member used in the light shielding member according to the present invention are disclosed in Japanese Patent Application Laid-open Nos. 62-283331, 62-286041, and 62-286042.
The treatment described in Japanese Patent Publication No. 46-28218, Japanese Patent Publication No. 53-25893, etc. may be applied.

A method for attaching the light shielding member used in the present invention to the metal magazine body is described in Japanese Patent Application Laid-Open No. 49-9604.
No. 9, No. 53-105219, No. 53-105220
The methods described in JP-A No. 53-105221, JP-A No. 54-4932, JP-A-61-233738, JP-A-62-27733, and JP-A-61-210347 are applicable. In the case of magazines other than metal magazines, they can be attached by any known bonding method using a solvent type adhesive, double-sided adhesive tape, or the like. These light shielding members may be attached not only to the film entrance/exit portion of the magazine but also to the entire interior of the magazine.

Examples of the metal forming the magazine body of the magazine for photographic light-sensitive materials of the present invention include Japanese Patent Laid-Open No. 62-1
Steels, zincs, aluminums described in No. 40021,
Coppers or their alloys are used. In addition, the surfaces of these metals can be treated by methods such as phosphate coating, iron oxide coating, chromate coating, chromic acid oxide coating, and chromate diphosphate coating. may be applied.

When the magazine body is made of paper, paperboard, cardboard, etc. are used. In addition, the metal surface is
No. 0-26063, No. 61-113643, Patent Application No. 1983
It may be coated with the paint, ink, etc. described in No. 0-75207. Preferably used paints, inks, etc. include alkyd resin systems, amino-alkyd resin systems, vinyl resin systems, acrylic resin systems, epoxy resin systems, polyurethane resin systems, polyester resin systems, various anti-rust paints, water-based paints, cellulose derivatives, etc. Examples include paints, inks, etc. Also, JP-A No. 60-26061, No. 6
No. 0-26062, No. 60-26063, No. 61-1
They can also be used in combination as described in No. 13643 and the like.

In the present invention, a filler can be used to prevent the pile used in the light-shielding member from falling off the base fabric and to prevent the adhesive from penetrating into the pile portion. Examples of the filler used in the present invention include JP-A-60-118472 and JP-A-62-27733.
No., Patent Application No. 1983-211372, Patent Application No. 1987-195
635, JP-A No. 63-49756, and the like.

[0027] Examples of the adhesive used for pasting the light shielding member having the pile and the magazine body include those disclosed in Japanese Patent Application Laid-Open No. 63-123041, Japanese Patent Application Laid-Open No. 63-49756,
JP-A-63-124048, JP-A-61-28934
No. 7 and polyolefin systems such as polyethylene, vinyl acetate copolymer systems such as ethylene-vinyl acetate copolymer, acrylic acid ester copolymer systems such as ethylene-ethyl acrylate and ethylene-isobutyl acrylate, nylon 6, nylon 66, and nylon 10. , Nylon 12, N-
Polyamides such as methoxymethylated nylon, polyesters such as terephthalic acid, polyvinyl butyral,
Cellulose derivatives such as polyvinyl acetate, acetate, methyl cellulose, and acetate butyrate, polymethacrylic esters such as polymethyl methacrylate, polyvinyl ethers such as polyvinyl methyl ether, polyurethane, polycarbonate, styrene-ethylene-butylene- One or two selected from styrene block copolymers such as styrene, synthetic rubbers such as styrene-butadiene, isoprene, butyl rubber, special rubbers not included in these, and acrylic copolymers not included in the above. Examples include mixtures of more than one species.

[0028] In the present invention, for example, Japanese Patent Application No. 63-29
As described in No. 825, it is preferable to mix conductive carbon black or carbon fiber powder into the filler resin and/or adhesive to make it conductive.

[0029] When attaching the light shielding member to the magazine of the paper cartridge, a commercially available double-sided adhesive tape may be used.

[0030]

[Examples] The present invention will be specifically explained below using Examples, but the present invention is not limited thereto.

Preparation of yarn for pile (Examples 1 to 5, Comparative Examples 1 to 2) Example 1 Ethylene oxide/propylene oxide adduct of glycerin (addition polymerization ratio (weight) 80/20, average molecular weight 7
000) and dimethyl terephthalate, and polymethylphenylsiloxane (Shin-Etsu Chemical, KF54
) to the nylon 66 melt using a gear pump.
Figure 4-a
The fibers were melt-spun at 285° C. and 900 m/min using a spinneret with a cross-sectional shape, and then drawn at 3.25 times to produce antistatic fibers of 288 denier and 96 filaments. This fiber has a strength of 4.6g/d, a strength elongation of 41%, and a thickness of 5×107Ω・cm.
It has an electrical resistivity of , a friction coefficient of 0.38 (0.59 without silicone oil), and a cross-sectional shape as shown in Figure 3-A (ratio of the radius of curvature of the flat part to the radius of the circumscribed circle of 1.6). Was.

Example 2 Antistatic fibers (
Ratio of the radius of curvature of the flat part to the radius of the circumscribed circle2.3)
It was created.

Example 3 An antistatic fiber having a cross-sectional shape having two concave portions as shown in FIG. 3-D was produced in the same manner as in Example 1 except that a cap having the cross-sectional shape shown in FIG. 4-c was used. did.

Comparative Example 1 Nylon 66 fibers were prepared using a circular cross-sectional die (pore diameter: 0.25 mm) and without mixing the above-mentioned antistatic agent and smoothing agent.

Comparative Example 2 Antistatic fibers with a circular cross-sectional shape were produced in the same manner as in Comparative Example 1, except that a die with a circular cross-sectional shape was used and no smoothing agent was mixed.

Example 4 Nylon 66 fibers with a flat cross-sectional shape were produced in the same manner as in Example 3, except that the above-mentioned antistatic agent was not mixed.

Next, these Examples 1 to 4 and Comparative Example 1
~2 fibers are stapled with a fiber length of 51 mm, and 60/
The spun yarn of No. 2 was used as a pile yarn.

Sealing resin acrylic resin, ethylene vinyl acetate copolymer resin AX-2433 (manufactured by Daicel Chemical Industries, Ltd.), and acrylic resin W-6008 (manufactured by Diaquinto Industries, Ltd.)
) Mixed resin (8:2) Using the above material, it was attached to a cartridge for 135 film size, and a film was placed inside to prepare a sample. In addition,
The film used is a high-speed film. Each sample was examined for the presence or absence of static marks according to the test method below. The results are shown in Table 1.

Example 5 Except for not mixing polymethylphenylsiloxane,
After creating flat antistatic fibers in the same manner as in Example 3,
A light shielding member was created in the same manner. Next, amino-modified polydimethylsiloxane/epoxysilane (adhesion amount 0.3
/0.1% by weight) was applied to the pile surface of the light-shielding member using a roller, and then a dry heat treatment was performed at 120° C. for 3 minutes. Thereafter, samples were prepared in the same manner, and the presence or absence of static marks was examined according to the test method below. The results are shown in Table 1.

Test method Test conditions: Camera used: Nikon F-1 motor drive Film feed speed: 6 frames/second Temperature/humidity conditions: 5°C/10%R. H. After the photographing was completed, the film was developed and the presence or absence of static marks was visually evaluated according to the following criteria.

Judgment criteria: ×...Occurrence of static marks is clearly observed within the screen △...Occurrence of static marks is slightly observed.○...Occurrence of static marks is hardly observed.◎...Occurrence of static marks is observed at all. I can't do it

[0042]

[Table 1] As is clear from Table 1, the light shielding member using the pile fiber according to the present invention was found to be effective in preventing the generation of static marks. Also, the sealing resin used,
Acrylic resin type W-6008 Manufactured by Diabond Industries Co., Ltd., acrylic/styrene resin type GD-11
Manufactured by Kanebo NSC Co., Ltd., styrene/butadiene resin LX-415A Manufactured by Nippon Zeon Co., Ltd., ethylene vinyl acetate system Viniglue B-11, Viniglue B
-3L Made by Toritsu Kasei Kogyo Co., Ltd., and adhesive: Olefin-based Cranbetter X-1430 Made by Kurashiki Boseki Co., Ltd., polyurethane-based Elfan UH203
Made by Nippon Matai Co., Ltd., Elfan UH204 Made by Nippon Matai Co., Ltd., polyamide type Elfan NT10
0 Manufactured by Nippon Matai Co., Ltd., Elfan TN120
Made by Nippon Matai Co., Ltd., polyester SP-170
Manufactured by Nippon Gosei Kagaku Co., Ltd., LP-011 Manufactured by Nippon Gosei Kagaku Co., Ltd., PES-120 Toagosei Kagaku Kogyo Co., Ltd. (
A similar test was carried out by adding 10% by weight of #40 manufactured by Mitsubishi Chemical Industries, Ltd. as conductive carbon to the resin, but the same results were obtained.

Preparation of yarn for pile (Examples 6 to 9) Example 6 Conductive thermoplastic resin 91 made of nylon 66 containing 35% by weight of conductive carbon black and polymethylphenylsiloxane used in Example 1 A fixed amount of 0.2% by weight was injected into the molten nylon 66 using a gear pump, and the antistatic protective resin 92 was uniformly mixed using a static mixer with 20 elements. After joining, a cap having the cross-sectional shape shown in FIG. 4-b was formed. Melt composite spinning was carried out at 285°C and 900 m/min using
An undrawn composite fiber (CF4) having a denier of 6 filaments was obtained. However, it is a spun mixed fiber yarn in which two filaments are conductive fibers having the bonding form shown in FIG. 3-G, and the remaining four filaments are fibers having the shape shown in FIG. 3-C.

Next, the flat antistatic undrawn yarn (AF4) obtained in the same manner as in Example 3 except that it was made into a 260 denier 36 filament was doubled and hot stretched, and then entangled with air to obtain a 100 denier filament. A mixed fiber yarn of denier 42 filaments was prepared.

Example 7 A flat undrawn yarn (AF5) obtained in the same manner as AF4 except that the above-mentioned antistatic agent was not mixed was doubled with CF-4, hot-stretched, and then entangled with air. A mixed fiber yarn of 100 denier and 42 filaments was prepared.

Example 8 Except for not mixing the antistatic agent and having a circular cross-sectional shape,
Undrawn yarn (AF6) obtained in the same manner as AF4 was used as CF-4.
After doubling and hot stretching, the yarn is entangled with air to obtain a 100%
A mixed fiber yarn of denier 42 filaments was prepared.

Using the mixed fiber yarns of Examples 6 to 8 as piles, light shielding members were prepared according to the following conditions.

Example 9 A light shielding member was prepared using the mixed fiber yarns of Example 6 and Example 8 in a pile at a ratio of 1:1 under the following conditions.

Example 10 A light shielding member was prepared using the mixed yarns of Example 6 and Example 8 in a pile at a ratio of 1:3 under the following conditions.

Furthermore, in order to prevent the pile from falling out, 40 g/m2 of acrylic/styrene resin (GD-11, manufactured by Kanebo NSC Co., Ltd.) was used as a sealing resin, and an olefin adhesive (#7500, manufactured by Hirodyne Industries, Ltd.) was used. Co., Ltd.) with a thickness of 70 μm
After coating to a thickness of , a light-shielding material was manufactured through a dyeing and finishing process.

Next, in the same manner as in Examples 1 to 3, it was attached to the entrance/exit portion of a photographic film magazine, and the presence or absence of static marks was examined using the same test method and criteria as in Example 1. The results are shown in Table 2.

[0052]

[Table 2] Example 11 Nylon 66 pile yarn (sample No. 1, 2, 3 , 4) were prepared, and fabrics for light shielding members were prepared under the following conditions.

[0053] After the fabric for the light-shielding member was subjected to the shirring and dyeing process, the pile surface was coated with a phosphoric acid compound-based antistatic agent (Electro Stripper K, manufactured by Kao Corporation) and the silicon-based smoothing agent used in Example 5. was treated with an aqueous dispersion of

Furthermore, in order to prevent pile shedding, 20% by weight of conductive carbon black is added in advance to an acrylic/styrene resin system (GD-11, Kanebo NSC).
Co., Ltd.) as the sealing resin, and light-shielding material No. 1
- 4 were created respectively.

The surface of the obtained light-shielding member was brought into frictional contact with the film surface (load: 100 g/m 2 , speed: 10 m/min), and the charged voltage of the film was measured. The results are shown in Table 4.

[0056]

[0057]

[Table 4] As is clear from Table 4, the light shielding member using the pile fiber according to the present invention lowered the charging voltage of the film, and no static marks were observed.

[0058]

Effects of the Invention As described in detail above, the magazine for photographic light-sensitive materials of the present invention has an excellent antistatic effect by eliminating static electricity generated during high-speed photographing or high-speed storage of light-sensitive materials, and suppressing the generation of static electricity. It was possible to prevent static marks from occurring.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a magazine for photographic light-sensitive materials.

FIG. 2 is a partially cutaway perspective view of a cartridge type magazine for photographic light-sensitive materials.

FIG. 3 is a diagram showing examples of cross-sectional shapes of fibers that can be used in A to H piles.

FIGS. 4A to 4C are cross-sectional views of a spinneret for spinning fibers.

[Explanation of symbols]

1 Spool shaft 2 Photographic material 3 Photographic material entrance/exit 4 Outer tubes 5a, 5b Light shielding member 21 Packaging body 22 Inner body 23 Exterior body 24 Winding tubes 25, 26 Support member 27 Outlet 28 Light shielding means 29a, 29b Passage forming member 30a, 30b Light-shielding cloth 91 Conductive thermoplastic resin 92 Protective component resin 101 Thermoplastic resin that is decomposed and removed by alkali treatment

Claims (2)

[Claims] 1. A magazine for photographic material in which a light-shielding member having a base fabric and a pile is attached to an entrance/exit portion of the photographic light-sensitive material, wherein the pile has a cross-sectional shape including at least a part of a flat portion and/or a concave portion. has a filament,
A magazine for photographic materials, characterized in that it contains or has a polyorganosiloxane and/or a modified product thereof attached thereto. 2. The magazine for photographic material according to claim 1, wherein the pile has antistatic fibers or conductive composite fibers.