JP2000231168A - Transparent magnetic recording photographic sensitive medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic recording photographic sensitive medium such that the developed product of the medium does not accumulate dirt on a head when magnetic information is recorded or read and that it shows excellent reliability of recording and reading of the magnetic information. SOLUTION: This photographic sensitive medium with a transparent magnetic recording layer has at least one layer of a magnetic recording layer containing magnetic particles on a supporting body and has at least a photosensitive silver halide emulsion layer on the opposite side to the magnetic recording layer side. The medium is produced in such a manner that its developed product has the coefft. of static friction (μs) and the coefft. of dynamic friction (μk) on the magnetic recording layer side and on the emulsion layer side at 25 deg.C and 60% RH satisfy the relation of 0.18<=μs<=0.50 and 0.34<=μk/μs<0.70.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent magnetic recording photographic medium having no magnetic input / output errors.

[0002]

2. Description of the Related Art The magnetic recording layer of a conventional magnetic recording medium such as an audio tape, a video tape, and a floppy disk has a large magnetic substance content (amount of coating) and can provide a large magnetic output but has no light transmission. On the photo film for
A magnetic recording layer as described above cannot be provided. U.S. Pat. No. 5,491,051 discloses a photographic element aiming at compatibility between magnetic characteristics and photographic characteristics.
However, this photographic element contains various information such as shooting date and time, weather, lighting conditions, shooting conditions such as reduction / enlargement ratio,
When the number of reprints, the portion to be zoomed, the message, etc., which are magnetically recorded, are used in large quantities or repeatedly, the input and output of magnetically recorded information is not always reliable. Japanese Patent Application Laid-Open No. 7-181638 discloses a photosensitive material in which the range of the coefficient of friction is specified. However, even when such a photosensitive material is provided with a magnetic recording layer, the reliability of recording and reading of magnetic information can be improved. Sex was inadequate. In addition, a photographic element provided with magnetic recording capability requires a development step in order to obtain an optical image. in this case,
For example, when a film is subjected to a development process, a dried product containing the processing solution component as a main component remains on the magnetic recording surface of the film.
Therefore, in recording and reading magnetic information, when a large amount of film runs on the magnetic head, it is inevitable that dirt adheres and accumulates on the head. As a result, the contact between the magnetic layer and the head is remarkably deteriorated, and there is a problem that a recording and reading error of magnetic information occurs due to a spacing loss.

[0003]

Accordingly, the present invention provides
In particular, it is an object of the present invention to provide a magnetic recording photographic photosensitive medium which does not accumulate dirt on a head when recording or reading magnetic information on a developed product, and has excellent reliability in recording and reading magnetic information.

[0004]

An object of the present invention is to provide at least one magnetic recording layer containing magnetic particles on a support, and at least one photosensitive layer on the side opposite to the magnetic recording layer. In a photographic photosensitive medium having a transparent magnetic recording layer having a silver halide emulsion layer, the developed product was treated at 25 ° C and 60% R
The static friction coefficient (μs) and the dynamic friction coefficient (μk) between the side surface of the magnetic recording layer and the emulsion layer surface under H (relative humidity) satisfy the following relational expressions (1) and (2). And a transparent magnetic recording photographic photosensitive medium. Equation (1) 0.18 ≦ μs ≦ 0.50 Equation (2) 0.34 ≦ μk / μs <0.70

Here, more preferably, the static friction coefficient (μs) and the dynamic friction coefficient (μk) satisfy the following relational expressions (3) and (4). Formula (3) 0.36 ≦ μs ≦ 0.48 Formula (4) 0.38 ≦ μk / μs ≦ 0.64 The magnetic recording layer contains spherical inorganic particles and / or spherical organic polymer particles, and magnetic recording is performed. More preferably, the layer side contains at least one kind of higher fatty acid ester slip agent, and the support is a polyester support. In this specification, the side opposite to the magnetic recording layer means the side opposite to the magnetic recording layer with the support interposed therebetween.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
In the present invention, the coefficient of static friction (μs) is μs> 0.50
In the case of the magnetic recording or reading device, the solid matter of the binder and / or the processing liquid is peeled off and the magnetic head is easily stained. On the other hand, when μs <0.18, the slip agent and / or the processing liquid are used. Solid matter becomes head dirt. In addition, static friction coefficient (μs) and dynamic friction coefficient (μk)
When μk / μs ≧ 0.70, the unevenness of the back surface is uniform and the dirt easily adheres in the magnetic recording or reading device, and when μk / μs <0.34, the unevenness of the back surface is uneven. Too practical. In the present invention, it has been found that when the above relational expressions (1) and (2) are satisfied, excellent magnetic properties are obtained.

The control of the coefficient of friction in the present invention is preferably carried out by using particles of various types and sizes and a slipping agent. Spherical inorganic particles and / or spherical organic polymer particles to be used can be used to finely dry the developing solution that is highly sticky and accumulative and remain on the film. This has the effect of preventing the head from becoming dirty, and has the effect of removing dirt from the head even if it adheres. Further, the coefficient of friction changes due to a change in the surface state due to the development processing and the adhesion of the processing liquid component. By using particles as in the present invention, the change in this coefficient of friction due to processing can be relatively small.

A particle having a large particle size is better in order to make it difficult to adhere due to spacing, but if it is too large, falling off occurs, the magnetic output decreases, and the haze becomes too large as a photographic light-sensitive material. This causes problems such as a decrease in the graininess. If the particle size is not less than twice the thickness of the magnetic layer, the particles will fall off. Therefore, the particle size is preferably 0.01 to 2 μm, more preferably 0.4 to 1.5 μm. The use amount of the spherical inorganic particles and / or the spherical organic polymer particles is preferably 1 to 40 mg / m ² from the viewpoint of haze, and is 10 to 36 mg / m ^2.
m ² is more preferred. The use ratio of the spherical inorganic particles and the spherical organic polymer particles is preferably 1: 9 to 9: 1,
2: 8 to 8: 2 are more preferred.

Specifically, in addition to polysiloxane and methacrylic resin particles, organic polymer particles such as polystyrene, melamine resin, benzoguanamine resin, polytetrafluoroethylene, cellulose acetate, polycarbonate, and nylon can be used. Polymer particles are preferred. Further, particles composed of these composites or particles obtained by coating an organic polymer on spherical inorganic particles may be used. Alternatively, acrylic esters, methacrylic esters, itaconic diesters, crotonic esters, maleic diesters, phthalic diesters, styrene derivatives, vinyl esters, acrylamides, vinyl ethers,
Allyl compounds, vinyl ketones, vinyl heterocyclic compounds,
One or more homopolymers or copolymers of allyl compounds, acrylonitrile, methacrylonitrile, polyfunctional monomers, and other monomers are prepared by various means such as suspension polymerization, spray drying, or dispersion. Particles may be used.

In order to remove head dirt, spherical inorganic particles having higher hardness than the above-mentioned organic polymer particles are preferable. Specifically, silica (silicon dioxide), titanium dioxide, or the like can be used. It is preferable that the inorganic particles have a sharp particle size distribution because spherical inorganic particles uniformly project from the surface of the medium, so that dirt attached to the magnetic head can be instantaneously and efficiently removed. The spherical inorganic particles may be either crystalline or amorphous. Amorphous particles are preferred in that the particle size distribution is sharp. In addition, silica is particularly preferable among the spherical inorganic particles because of the adsorption reactivity with the silane coupling agent. In the present invention, the Mohs hardness is preferably from 6 to 9. If the Mohs hardness is less than 6, the ability to remove the highly sticky dirt is low, and conversely particles having a Mohs hardness of 9 or more (for example, α-alumina particles)
In this case, the magnetic head cannot be used in a large amount because the magnetic head is excessively polished and the life of the head is shortened.

However, in order to polish the scratches on the surface of the magnetic head by entraining the surrounding dust and sand while the medium is running, and to always keep the surface of the magnetic head mirror-finished, the magnetic recording medium of the present invention is used. It is preferable to use a small amount of abrasive particles such as α-alumina. α-Alumina may be contained in either the magnetic recording layer coating solution or the upper layer coating solution, but in order to exhibit the effect of alumina, the alumina particle protrusion height must be other spherical inorganic or organic. It is preferable to select the particle diameter and the coating method so as to be higher than the protruding height of the polymer particles. α-Alumina may be added to both the magnetic material-containing layer and the later-described higher fatty acid ester slip agent-containing layer, or to both layers, but more preferably to the magnetic material-containing layer.

In addition to the above-mentioned spherical inorganic particles, the coating amount is 1 nm to 50 nm, and the coating amount is 10 mg / m ^{2 to} 200.
It is preferable to contain minute spherical inorganic particles so as to be not more than mg / m ² . The inorganic particles divide the dried product of the developing solution into fine particles, and make the dirt on the magnetic head sufficiently small by making the dirt smaller than the spacing with the magnetic head given by the above-mentioned spherical inorganic particles and spherical organic polymer particles. This has the effect of making contact difficult. The particle size is preferably 5n
m or more and 40 nm or less, more preferably 10 nm or more and 30 nm or less. If it exceeds 50 nm, the transparency will decrease. Examples of the spherical fine inorganic particles include γ-alumina, θ-alumina, titanium dioxide, colloidal silica and the like, and preferably colloidal silica in terms of dispersion stability. However, in the present invention, these fine particles are used for providing minute surface projections on the surface of the magnetic layer in order to finely divide the processing solution stain, and in order to achieve the object of the present invention, And other particles can also be used.

The average particle size of the spherical organic polymer particles is
By selecting a particle having a size larger than the spherical inorganic particle size, when the magnetic recording layer surface and the emulsion layer surface on the opposite side are slid in the cartridge when the film is taken in and out, the particles that come into contact with the emulsion layer surface are reduced. Spherical organic polymer particles having a low hardness make it less likely to damage the emulsion layer surface. In this regard, it is more preferable to use spherical organic polymer particles in combination.

Further, a part or all of the solvent of the coating solution for the layer containing the spherical inorganic particles and the spherical organic polymer particles may be added to the lower layer of the layer (in the present invention, diacetyl cellulose which is a binder for the transparent magnetic recording layer). The above particles can be embedded in a part of the lower layer so as to have a very uniform protrusion height by using a solvent capable of dissolving the above ()). This uniformity is far superior to the case where the spherical particles are incorporated in a transparent magnetic recording layer, and in achieving both magnetic input / output performance and transparency,
It was found to be very advantageous. At that time, it is preferable that the individual particles are buried by 50% or more in volume in order to prevent the particles from falling off, and it is more preferable that the particles are buried by 60% or more. Conversely, in order to exhibit a sufficient cleaning function and a spacing function for preventing the head from being stained, it is preferable that the volume is not filled by 80% or more. A sharp particle size distribution of the spherical particles is preferable because the pressure can be dispersed under the pressure of an opposing roller or the like and the sinking of the particles is reduced, so that the spacing with the head is kept large.

Specific examples of the spherical organic polymer particles, spherical inorganic particles, spherical fine inorganic particles and α-alumina abrasive particles used in the present invention include, but are not limited to, the following. Hereinafter, all the items shown in brackets are trade names.

(Spherical organic polymer particles) "Tospearl 105" and "Tospearl 10" manufactured by Toshiba Silicone Co., Ltd.
8 "," XC99-A8808 "or more polysiloxane particles. "MX-100" and "MX-1" manufactured by Soken Chemical Co., Ltd.
50 ", Nippon Paint Co., Ltd." P-1430 ",
“P-5000” or more PMMA particles. Nippon Shokubai Co., Ltd. "Eposter S12", "Eposter S6" or more melamine resin particles.

(Spherical inorganic particles) "Seahoster KEP30" and "Seahoster KEP50" manufactured by Nippon Shokubai Co., Ltd.
"Sea Hoster KEP70", "Sea Hoster KEP9"
0 ”,“ Seahoster KEP100 ”,“ Seahoster KE ”
P150 ”or higher amorphous silica.

(Fine inorganic particles) “AKP-G015” (γ-alumina) manufactured by Sumitomo Chemical Co., Ltd. “AKP-G008” (θ-alumina) manufactured by Sumitomo Chemical Co., Ltd. “Idemitsu Petrochemical Co., Ltd.” "Idemitsu Titania" (titanium dioxide) "MEK-ST", "MIBK-S" manufactured by Nissan Chemical Industries, Ltd.
T "," methanol silica sol "," MA-ST-M ",
"IPA-ST" or higher colloidal silica

(Α-alumina abrasive particles) “AKP30”, “AKP20”, “AKP1” manufactured by Sumitomo Chemical Co., Ltd.
5, AKP10, Sumicorundum AA-1.
5 "," Sumicorundum AA-1.0 "," Sumicorundum AA-0.7 "," Sumicorundum AA-0.
5 "," HIT50 ", Reynolds Corporation" ERC-
DBM ", Norton Corp." Norton-E60 "
0 "

The thickness of the magnetic recording layer is 0.3 μm or more and 1.5
μm or less, preferably 0.5 μm or more and 1.2 μm or less. Further, in order for the magnetic recording layer to sufficiently retain the spherical inorganic particles and the spherical organic polymer particles, the thickness of the magnetic recording layer is preferably 50% or more of the size of the particles used.

Next, the higher fatty acid ester slip agent used in the present invention will be described in detail. Conventionally, Japanese Patent Publication No. 58-3354
No. 1, British Patent No. 927,446, or JP-A-55-126238 and JP-A-58-90633, which are higher fatty acid esters (fatty acids having 10 to 24 carbon atoms and 10 carbon atoms). And esters of linear higher fatty acids and higher alcohols as disclosed in JP-A-58-50534, and branched alkyls as disclosed in WO 90108115.8. Higher fatty acid-higher alcohol esters containing a group are known, and these can be used as a slipping agent in the present invention. The combined use of these slip agents can reduce friction and adjust the contact angle.

Also, they are represented by the general formulas (1) and (2).
Long-chain alkyl compounds are sufficient before and after development
It is preferable in that excellent slip properties and scratch resistance can be obtained. General formula (1) R¹X¹R^Two  General formula (2) R^ThreeX^TwoR^FourX^ThreeR^Five  In the general formula (1), R¹, R²Is an aliphatic carbonized
It is a hydrogen group. The total carbon number of this compound is 25 or more and 120
You need: Total carbon number is enough to get enough slip
Requires 25 or more. In addition, the total carbon number is 120
If it is larger, the solubility in the organic solvent is poor,
It becomes difficult to apply by coating. More preferred as total carbon number
30 or more and 100 or less, more preferably 40 or more
80 or less. Also, R¹, R²Has sufficient scratch resistance,
And to prevent the deterioration of slipperiness under various operating conditions.
An aliphatic hydrocarbon group having 10 to 70 carbon atoms, respectively.
Is preferred. When the carbon number is 10 or less, the scratch resistance
Deterioration and transfer of slip agent under various conditions of use
Deterioration occurs. In addition, one end functional group having 70 or more carbon atoms
Aliphatic compounds are generally used except those specially synthesized.
Not known to This aliphatic hydrocarbon group has a linear structure
Or may contain an unsaturated bond,
It may have a substituent or may have a branched structure
No. Of these, a linear structure is particularly preferable from the viewpoint of scratch resistance.
It is made. R¹, R²Is more preferable as the carbon number of
Is 15 or more and 50 or less.

In the general formula (2), R³, R⁴, R⁵
Is an aliphatic hydrocarbon group. The total carbon number of this compound is 3
0 to 150 is required. Total carbon number is enough slip
In order to obtain the property, 30 or more is required. Also, total coal
When the prime number is more than 150, the solubility in the organic solvent becomes
Poorly, it is difficult to apply by dispersion or coating. Total carbon number and
And more preferably 40 or more and 130 or less, even more preferably
Or 50 or more and 120 or less. In addition, sufficient scratch resistance,
And to suppress the deterioration of the slipperiness under various use conditions,
³, R⁵Is an aliphatic having 10 or more and 70 or less carbon atoms, respectively.
Hydrocarbon group, R ⁴Is an aliphatic having 10 to 50 carbon atoms
It is preferably a hydrocarbon group. R³, R⁵about
If the carbon number is 10 or less, the scratch resistance is deteriorated,
The transfer of the slip agent may cause the slipperiness to deteriorate
You. In addition, one end functionalized fat having 70 or more carbon atoms
Group compounds are generally known except those specially synthesized.
Not. This aliphatic hydrocarbon group may have a linear structure.
And may contain an unsaturated bond, and may have some substituents.
And may have a branched structure. this
Of these, a linear structure is particularly preferable from the viewpoint of scratch resistance.
You. R³, R⁵Particularly preferred as the carbon number of
5 or more and 50 or less. Also, R⁴About the carbon number
In the case of 10 or less, the scratch resistance deteriorates, and under various conditions of use.
The transfer of the slip agent causes the slip property to deteriorate. Also carbon
Aliphatic compounds having more than several 50 functional groups at both ends are particularly useful.
Other than those synthesized separately are not generally known. this
The aliphatic hydrocarbon group may have a linear structure,
It may contain a saturated bond or may have some substituents
Or may have a branched structure. this house,
A linear structure is particularly preferable from the viewpoint of scratch resistance. R⁴
Is preferably 10 or more and 30 or less.
You. Particularly preferred is 12 or more and 25 or less. Ma
In general formulas (1) and (2), X¹, X², X³
Is a divalent linking group. Specifically, -C (O) O-, -C
(O) NR-, -SO_Three-, -OSO_Three-, -SO_TwoNR-, -O-, -OC (O) NR-
(R is H or an alkyl having 8 or less carbon atoms)
Group). Compounds represented by the general formulas (1) and (2)
The specific example of a thing is shown.

[0024]

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[0025]

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As a more preferred slip agent, a polar substituent is added to at least one of R ¹ and R ² or at least one of R ³ , R ⁴ and R ^{5 in} the general formulas (1) and (2). Is a compound having Here, the polar substituent means a group capable of hydrogen bonding or an ionic dissociation group. The polar substituent is not particularly limited.
_{H, -COOH, -COOM, -NH 3} , -NR 4 + A
^- , -CONH _{2 and the} like are preferable. Here, M is a cation such as an alkali metal, an alkaline earth metal or a quaternary ammonium salt, R is H or a hydrocarbon group having 8 or less carbon atoms, and A ⁻ is an anion such as a halogen atom. Of these groups, -OH is particularly preferred. There may be any number of such polar substituents in one molecule.

The general formulas (1) and (2) used in the present invention
The use amount of the slip agent represented by is not particularly limited, but the use amount, when spherical inorganic particles are present, sufficient slip,
In order to develop scratch resistance, 0.01 to 0.1 g / m ²
And more preferably 0.02 to 0.07 g / m
² , more preferably 0.03 to 0.05 g / m ² . The slip agent is molecularly arranged on the magnetic recording layer side surface,
Expresses slipperiness. Specific examples are shown below, but the present invention is not limited to these.

[0028]

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[0029]

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The compounds of the above general formulas (1) and (2) are often poorly soluble in solvents because of their high hydrophobicity.
Therefore, there is a method of dissolving in a nonpolar organic solvent such as toluene or xylene or a method of dispersing in a coating solution, but a method of dispersing a nonpolar organic solvent is preferable because it is difficult to handle. At this time, any dispersing agent may be used as long as it does not deteriorate the slipperiness and scratch resistance. Preferred dispersing agents include those described in the following general formula (3).

General formula (3) R ⁶ YBD In general formula (3), R ⁶ is an aliphatic hydrocarbon group having 25 to 70 carbon atoms. This hydrocarbon group may contain an unsaturated bond, may be substituted with various substituents, and may contain a branched structure. Particularly preferred for slipperiness and scratch resistance are straight-chain aliphatic hydrocarbon groups. The number of carbon atoms of this hydrocarbon group is in the range of 25 or more and 70 or less. With a hydrocarbon group having 25 or less carbon atoms, there are problems such as insufficient slippage, lack of scratch resistance, and poor slipperiness after treatment. As a hydrocarbon compound having a carbon atom of 70 or less and having one terminal functionalized, a long-chain straight-chain or branched aliphatic alcohol is known.
Compounds having zero or more hydrocarbon groups are generally rarely known. Particularly preferred as the number of carbon atoms is 3
It is 0 or more and 60 or less.

Y is a divalent linking group. Specifically, -C (O) O -, - OCO -, - C (O) NR '-, - NR'CO -, - SO 2 NR'
-, -NR'SO _2- , -O-, -S-, -NR-, -OCOR "COO-, -OCOR"
O- and the like can be mentioned (R ′ represents H or a hydrocarbon group having 8 or less carbon atoms, and R ″ represents a hydrocarbon group having 0 to 8 carbon atoms). B represents-(CH ₂ CH ₂ O) _a- ,
Or-(CH ₂ CH (OH) CH ₂ O) _b- or-((CH ₂ ) _c CH (R) CH ₂ O)
_d- or-(CH ₂ CH ₂ O) _e- (CH ₂ CH (OH) CH ₂ O) _f -((CH ₂ ) _c CH
_{(R) CH 2 O) g} - consists either units, a is 3-4
0, b, d are 3 to 30, c is 1 to 3, e is 0 to 40,
f, g are 0~30, e + f + g is 3 to 40, R is H, CH _3, a phenyl group. If the length of these nonionic groups is too short, sufficient solubility of the slip agent cannot be obtained, or sufficient dispersion stability cannot be obtained when dispersed. On the other hand, if the length is too long, there arise problems such as insufficient slippage and scratch resistance, and deterioration of the slippage property with time after the treatment. Particularly preferred among the above nonionic group _{- (CH 2 CH 2 O)} a - a and, a is is preferably 5 to 30. D is a terminal group such as a hydrogen atom and an alkyl group.

The polyether-containing compound used in the present invention as described above can be prepared, for example, by subjecting a corresponding higher alcohol to sequential addition reaction of ethylene oxide by a conventional method, or adding a higher alcohol polyether to a corresponding dicarboxylic acid. The product can be easily synthesized by dehydrating and condensing the product or by condensing a higher carboxylic acid with the higher alcohol polyether adduct. The use ratio of the general formula (3) to the slipping agent (1) or (2) is preferably 1: 9 to
9: 1, more preferably 2: 8 to 8: 2. Also,
The method of dispersing the slip agent will be described later. Specific examples of the compound represented by the general formula (3) are shown.

[0034]

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The thickness of the higher fatty acid ester layer on the magnetic recording layer is preferably 0.01 μm or more and 0.5 μm or less. More preferably 0.01 μm or more and 0.1 μm or less, still more preferably 0.01 μm or more and 0.05 μm
m or less.

In the present invention, the coating solution containing a higher fatty acid ester slip agent applied to the upper layer of the magnetic material layer is desirably an organic solvent which does not hinder the dispersion stability of the higher fatty acid ester slip agent dispersion. In addition, even in an organic solvent in which such a higher fatty acid ester slipping agent is present, in order to secure the dispersion stability of the hydrophilic inorganic particles, it is necessary to use an amine-based silane coupling agent of the first to third grades beforehand. Is effective.
As the silane coupling agent, at least one or more primary to tertiary amine silane coupling agents may be used, preferably primary or secondary amine silane coupling agents, and more preferably primary amine silane coupling agents. Preferably, one or more coupling agents are used. The amount of the amine-based silane coupling agent used is determined according to the specific surface area of the inorganic particles to be used, but as a rough guide, 0.1 to 20 wt.%, Preferably 0.5 to 15w
%, more preferably 2 to 10 wt.%. The above silane coupling agent is treated by a direct treatment method for inorganic particles or an integral blending method, and the direct method includes a dry method, a slurry method, and a spray method. In the dry method, for example, inorganic particles and a small amount of water, or an organic solvent, or an organic solvent containing water and a coupling agent are mixed, and after dispersion, water and the organic solvent are removed. It is preferable for surface treatment. However, considering the reduction of industrial load, when preparing an inorganic particle dispersion, it is possible to add a silane coupling agent to the dispersion and adsorb and react the silane coupling agent to the inorganic particles in the liquid. Most efficient.

In order to further improve the dispersion stability of the inorganic particles, the inorganic particles are surface-treated by using at least one kind of anionic surfactant and the above-mentioned amine silane coupling agent in combination. Is very effective.

The amount of the anionic surfactant to be used is roughly the same as the amount of the amine silane coupling agent used. It is 0.1 to 20% by weight, preferably 0.5 to 15% by weight, more preferably 2 to 10% by weight, based on the weight of the inorganic particles. Similarly to the amine silane coupling agent, if the amount of the anionic surfactant is too large, the lubricating effect of the higher fatty acid ester slip agent is undesirably reduced.

The film support used in the present invention includes triacetyl cellulose (TAC), polyamide, polycarbonate and the like, in addition to the polyesters listed below, and polyester is more preferable. These supports can be subjected to a heat treatment at a temperature of 40 ° C. or more and a glass transition temperature or less before coating the photosensitive layer for 0.1 to 1500 hours to improve the curl characteristics. Even if the photosensitive material is wound around the spool and stored in the cartridge,
The film can be sent out from the cartridge by rotating the spool without excessive curling.
In particular, a polyester support can obtain an improvement effect in a relatively short time than other supports.

The preferred average molecular weight range for these polyesters is from about 5,000 to 200,000. The polyester used in the present invention has a Tg of 70 ° C. or higher and 1
70 ° C. or lower, preferably 90 ° C. or higher and 150 ° C. or lower. Specifically, the following compound examples can be shown.

Compound Example P-1: [terephthalic acid (TPA) / ethylene glycol (EG)) (100/100)] (PET) Tg = 80 ° C. P-2: [2,6-naphthalenedicarboxylic acid (NDCA) / Ethylene glycol (EG) (100/100)] (PEN) Tg = 119 ° C P-3: 2,6-NDCA / TPA / EG (50/50/100) Tg = 92 ° C P-4: PEN / PET (60/40) Tg = 95 ° C P-5: PEN / PET (80/20) Tg = 104 ° C

Preferred among the polyesters is 2,6-
A polyester containing naphthalenedicarboxylic acid, wherein 2,6-naphthalenedicarboxylic acid is included in all dicarboxylic acids.
It is a polyester containing 0 mol% or more. Among them, polyethylene-2,6-naphthalenedicarboxylate is particularly preferred. The thickness of the support is 80 to 115 μm.
m is preferable, and particularly preferably 85 to 105 μm.

For the TAC support, a plasticizer such as triphenyl phosphate, biphenyl diphenyl phosphate, dimethyl ethyl phosphate or the like is usually added.

The support may contain a dye for the purpose of neutralizing the base color, preventing light piping, preventing halation, and the like.

In order to firmly adhere the coating layers (photosensitive silver halide emulsion layer, intermediate layer, filter layer, magnetic recording layer, conductive layer) provided on the support, chemical treatment,
Mechanical treatment, corona discharge treatment, flame treatment, UV treatment,
After performing a surface activation treatment such as a high-frequency treatment, a glow discharge treatment, an active plasma treatment, a laser treatment, a mixed acid treatment, an ozone oxidation treatment, it is preferable to obtain an adhesive force by directly applying. Alternatively, it is also possible to provide an undercoat layer after the surface treatment or once without the surface treatment, and coat the photographic emulsion layer thereon.

The refractive index of the particles used in the present invention is not particularly limited, but the difference is 0.08 or less, more preferably 0.04 or less, still more preferably the refractive index of the layer containing the particles. A value of 0.02 or less is desirable in that the transparency of the medium such as haze can be improved.

In the magnetic recording medium of the present invention, the haze of all layers on the magnetic recording layer side at the time when the emulsion layer is not coated is 8.5%.
Is preferably less than 8%, more preferably less than 8%. The transparent magnetic recording layer refers to a magnetic recording layer having a degree of transparency that does not substantially affect the photographic image quality, and has a blue filter transmission density of 0 to 0.2, preferably 0 to 0.2.
0.15, more preferably 0 to 0.12.

The spherical inorganic particles (spherical fine inorganic particles), spherical organic polymer particles, α-alumina abrasive, etc. used in the present invention are prepared as respective dispersions, and added and stirred in the final coating solution. Adjustment is industrially preferable. Further, a dispersion liquid can be prepared by selecting a dispersion method (dispersion machine or the like) similar to that for a magnetic substance described later.

The magnetic particles contained in the transparent magnetic recording layer used in the present invention include a ferromagnetic iron oxide such as γ-Fe ₂ O ₃ (FeOx, 4/3 <x ≦ 3/2), -Fe
Co-coated ferromagnetic iron oxide such as ₂ O ₃ (FeOx, 4/3 <
x ≦ 3/2), Co-coated magnetite, other Co-containing ferromagnetic iron oxide, Co-containing magnetite, ferromagnetic chromium dioxide, ferromagnetic metal, ferromagnetic alloy, and other ferrites such as hexagonal Ba ferrite , Sr ferrite, Pb ferrite, Ca ferrite, or a solid solution or ion substitute thereof.

The shape of the ferromagnetic material may be any of a needle shape, a rice grain shape, a spherical shape, a cubic shape, a plate shape, and the like, but the needle shape is preferable in terms of the electromagnetic conversion durability. As for the particle size, in the case of a needle shape, the particle size (long axis length) is preferably 0.01 to 0.5 μm, the ratio of the long axis to the short axis is preferably 50: 1 to 2: 1, and the long axis is preferably 0.1 to 2: 1. ~
0.35 μm, and the ratio of the major axis to the minor axis is more preferably 20: 1 to 3: 1. The specific surface area of the particles is preferably 30 m ² / g or more, more preferably 40 m ² / g or more in SBET. It is preferable that the particle size distribution of the magnetic material be as sharp as possible from the viewpoint of magnetic performance and haze. Saturation magnetization (σ
s) is 50 emu / g or more, more preferably 70 emu / g or more.
u / g or more. Further, the squareness ratio of the ferromagnetic material (σr / σ
s) is preferably 40% or more, more preferably 45% or more. Coercive force (Hc) is 200 Oe or more and 3000 Oe or less,
Preferably it is 500 Oe or more and 2000 Oe or less.
The content of the magnetic particles in the magnetic recording layer is preferably from 10 to 100 mg / m ² from the balance between magnetic reading performance and transparency.

These ferromagnetic particles are used, for example, in
Surface treatment may be performed with silica and / or alumina, such as those described in JP-A-9-23505 and JP-A-4-096052. Also, JP-A-4-195726, JP-A-4-192116, JP-A-4-259911, and JP-A-5-09-1
Surface treatment with an inorganic and / or organic material as described in Japanese Patent No. 81652 may be performed. Further, the surface of these ferromagnetic particles may be treated with a silane coupling agent or a titanium coupling agent. Examples of the coupling agent include 3-mercaptopropyltrimethoxysilane, 3-isocyanylpropylmethyldimethoxysilane, 3- (poly (polymerization degree 10) oxyethynyl) oxypropyltrimethoxysilane, 3-methoxy (poly (polymerization degree 6) Oxyethynyl) oxypropyl trimethoxysilane, decyltrimethoxysilane and the like are used. The addition amount of these silane coupling agent and titanium coupling agent to the magnetic particles is preferably 1.
The content is 0 to 200% by weight, more preferably 1 to 75% by weight, and still more preferably 2 to 50% by weight.
These silane coupling agents and titanium coupling agents are treated by a direct treatment method for magnetic particles or an integral blending method, and the direct methods include a dry method, a slurry method, and a spray method. In the dry method, for example, magnetic particles and a small amount of water, or an organic solvent, or an organic solvent containing water and a coupling agent are mixed and stirred with an open kneader to remove water and the organic solvent, and then finely dispersed. Is preferred.

The method for dispersing the magnetic material in a binder described below is preferably a kneader, a pin mill, an annular mill, or the like, and more preferably a kneader and a pin mill, or a combination of a kneader and an annular mill. Examples of the kneader include an open type (open), a closed type, a continuous type, and a kneader such as a three-roll mill and a lab plast mill. Dispersion with a microfluidizer is also preferable.

The coercive force of the magnetic recording layer is 500 Oe to 3000 Oe, preferably 800 Oe to 150 Oe.
0 Oe or less.

The magnetic recording layer can be provided on the entire surface of the support or in the form of stripes. If necessary, the magnetic recording layer applied on the support is subjected to a process of immediately orienting the magnetic material in the layer while drying, and then the formed magnetic recording layer is dried. There is a method using a permanent magnet or a solenoid coil to orient the magnetic material. The strength of the permanent magnet is 200
0 Oe or more is preferable, and 3000 Oe or more is particularly preferable. In the case of a solenoid, it may be 500 Oe or more. The timing of orientation during drying is desirably at a point where the residual solvent in the magnetic recording layer is 5% to 70%.

The binder for the magnetic recording layer and the like used in the present invention is a thermoplastic resin, a thermosetting resin, a reactive resin, an acid,
Alkali or biodegradable polymers, natural polymers (cellulose derivatives, sugar derivatives, etc.) and mixtures thereof can be used. Tg of the above resin is −40 ° C.
300 ° C., weight average molecular weight is preferably 2,000 to 10
It is more preferably from 50,000 to 300,000.

Further, among the binders constituting the magnetic recording layer, cellulose esters having a substitution degree of 1.7 to 2.9 are preferably used. Particularly preferred are cellulose diacetate, cellulose acetate butyrate, and cellulose acetate propionate.

In the above binder, a polar group (epoxy)
Group, CO₂M, OH, NR₂, NR ₃X, SO₃M, O
SO₃M, PO₃M₂, OPO₃M₂Where M is water
Element, alkali metal or ammonium, one group
May be different from each other when there is more than one M in
R is hydrogen or an alkyl group).
You may.

The above binders are used alone or in a mixture of several kinds, and may contain an epoxy-based, aziridine-based, or isocyanate-based crosslinking agent. The use of a cross-linking agent can enhance the layers themselves or the adhesion between the layers. The isocyanate-based crosslinking agent is a polyisocyanate compound having two or more isocyanate groups, for example, tolylene diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, naphthylene-
Isocyanates such as 1,5-diisocyanate, o-toluidine diisocyanate, isophorone diisocyanate, triphenylmethane diisocyanate, and reaction products of these isocyanates with polyalcohols (for example, reaction of 3 mol of tolylene diisocyanate with 1 mol of trimethylolpropane) Products), and polyisocyanates formed by condensation of these isocyanates. Particularly preferred among the above crosslinking agents are isocyanate-based crosslinking agents represented by the following general formula (4).

[0059]

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In the general formula (4), n is preferably in the range of 1 to 50, more preferably 0 to 30, and still more preferably 0 to 10. The number n does not need to be single and may have a distribution. φ represents a benzene ring. m
Is an integer of 1-2. R ₁ , R ₂ and R ₃ are H, an alkyl group (C1 or more), or an aryl group (C6 or more). The preferred viscosity of such a crosslinking agent is 50 (cP / 2
5 ° C) to 1000 (cP / 25 ° C). The preferable NCO content of such a crosslinking agent is 20 to 40%. More preferably, it is 25 to 35%. Commercial products of such a crosslinking agent include “Millionate MT” and “Millionate MR-100” manufactured by Nippon Polyurethane Co., Ltd.
"Millionate MR-200", "Millionate MR-
300, "Millionate MR-400", and "Sumidur 44V10" manufactured by Sumitomo Bayer Urethane Co., Ltd. (all of which are trade names).

The coating amount of the crosslinking agent is preferably in the range of 3 mg / m ^{2 to} 1000 mg / m ² ,
More preferably, it is 5 mg / m ² or more and 500 mg / m ² or less, and further preferably 10 mg / m ² or more and 300 mg.
/ M ² or less. In order for such a crosslinking agent to sufficiently perform crosslinking, it is preferable to perform heat drying at 50 ° C. or higher, preferably 70 ° C. or higher for 1 minute to 72 hours.

When the above-mentioned crosslinking agent is used, at least one of tertiary amine compounds, metal salt compounds and DBU (1,8-diaza-bicyclo [5,4,0] undecene-7) compounds is used. By simultaneously using more than one kind, the rate of the crosslinking reaction between the layer itself or the layer and the layer adjacent thereto can be accelerated, and the crosslinking reaction time for improving the durability can be shortened. For tertiary amines, for example, Polyurethane Te of Bruins et al.
channel No. 25, Interscience
ce (1960), such as tetramethylbutanediamine and 1,4-diazabicyclo [2,2,
2] Octane and triethylamine. Further, in the metal salt system, for example, dibutyl tin dilaurate,
Tin octoate, cobalt naphthenate, stannous chloride,
Tetra-n-butyltin, stannic tin chloride, trimethyltin hydroxide, dimethyltin dichloride and the like. Such a compound is, for example, added to the coating solution of the magnetic recording layer together with the crosslinking agent and then applied, or / added to the coating solution of the lower layer or / and the upper layer of the magnetic recording layer. The diffusion of the compound into the magnetic recording layer may be used.

Further, the transparent magnetic recording medium of the present invention includes:
In addition, a dye, a surfactant and the like can be contained.
Furthermore, the incorporation of a silicone-based compound or a fluorine-based compound (fluorine-containing compound) into at least one layer on the transparent magnetic recording layer side of the transparent magnetic recording medium of the present invention makes it difficult for dirt to adhere to the medium surface, and This is preferable in that dirt is not easily transferred to the surface of the magnetic head, and magnetic input / output problems can be reduced. For example, FC-431 manufactured by Sumitomo 3M Ltd. is exemplified. Examples of the slipping agent used in the transparent magnetic recording medium of the present invention include higher fatty acid esters (fatty acids having 10 to 24 carbon atoms and 10 to 6 carbon atoms).
0 esters of alcohols) are preferred.

As preferred magnetic recording photographic photosensitive media in the present invention, a color reversal film and a color negative film containing a silver halide photosensitive layer can be exemplified. In particular, a general color negative film is preferable. As the silver halide emulsion, usually, those subjected to physical ripening, chemical ripening and spectral sensitization are used. The effect of the present invention is particularly noticeable when an emulsion sensitized with a gold compound and a sulfur-containing compound is used. The additive used in such a process is Research Disclosure No. 17643 and N
o. 18716, and the relevant portions are mentioned later.

Known photographic additives which can be used in the present invention are also described in the above two Research Disclosures, and the relevant portions are shown in the following table. Additive type RD17643 RD18716 1 Chemical sensitizer page 23, page 648, right column 2 Sensitivity enhancer Same as above 3 Spectral sensitizer, page 23-24, page 648 right column-supersensitizer 649, right column 4 Brightening agent 24 Page 5 Antifoggant 24 to 25 page 649 right column and stabilizer 6 Light absorber, page 649 right column Filter dye, 25 to 26 page 650 left column UV absorber 7 Stain inhibitor 25 page right column 650 Page left to right column 8 Dye image stabilizer page 25 9 Hardening agent page 26 651 page left column 10 Binder 26 Same as above 11 Plasticizer and lubricant 27 page 650 page left column 12 Coating aid, pages 26 to 27 650 Right column Surfactant

Further, the transparent magnetic recording medium of the present invention is wound around a spool and rotated to rotate the spool in order to write or call out the magnetically recorded information.
It is preferable that the film medium is housed in a cartridge of a type that sends it out of the cartridge because the handling is easy.

Further, the transparent magnetic recording medium of the present invention can be used in a hermetically sealed photographing unit in which the film medium is loaded in a camera in advance, and can be photographed, and can be easily used by a user. Taking pictures using this unit is more preferable because it increases the chance of taking pictures.

[0068]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.

1) Coating of the first layer and the undercoat layer A polyethylene naphthalate (PEN) support having a thickness of 90 μm was used.
Torr, H ₂ O partial pressure of 75% in the atmosphere gas, a discharge frequency 30 kHz, output 2500W, processing strength 0.5 kV ·
Glow discharge treatment was performed at A · min / m ² . On this support, a coating solution having the following composition was formed as the first layer, as shown in JP-B-58-45.
Using the bar coating method described in JP-A-89-89, a coating amount of 5 cc / m ² was applied. Conductive fine particle dispersion (SnO ₂ / Sb ₂ O ₅ particle concentration 50 parts by weight 10% aqueous dispersion. Secondary aggregate having a primary particle diameter of 0.005 μm and an average particle diameter of 0.05 μm) Gelatin 0. 5 parts by weight Water 49 parts by weight Polyglycerol polyglycidyl ether 0.16 parts by weight Poly (degree of polymerization 20) oxyethylene 0.1 parts by weight Sorbitan monolaurate

Further, after the first layer is applied, it is wound around a stainless steel core having a diameter of 20 cm and heated at 110 ° C. (Tg of PEN support: 119 ° C.) for 48 hours (annealing).
After coating, a coating solution having the following composition was applied to the side opposite to the first layer side as an undercoat layer for the emulsion at a coating amount of 10 cc / m ² using a bar coating method. Gelatin 1.01 part by weight Salicylic acid 0.30 part by weight Resorcin 0.40 part by weight Poly (polymerization degree 10) oxyethylene nonylphenyl ether 0.11 part by weight Water 3.53 parts by weight Methanol 84.57 parts by weight n-propanol 10 .08 parts by weight

Further, a second layer and a third layer, which will be described later, are sequentially applied on the first layer, and finally, a color negative photosensitive material having a composition, which will be described later, is overlaid on the undercoat layer to obtain a transparent magnetic recording. A layered silver halide photographic photosensitive medium was prepared.

2) Coating of the second layer (transparent magnetic recording layer) (1) Preparation of fine dispersion of magnetic substance Co-coated γ-Fe ₂ O ₃ magnetic substance (average major axis length: 0.25 μm)
m, SBET: 39 m ² / g, Hc: 831 Oe, σs:
77.1 emu / g, σr: 37.4 emu / g) 11
Then, 00 parts by weight, 220 parts by weight of water and 165 parts by weight of a silane coupling agent [3- (poly (degree of polymerization: 10) oxyethynyl) oxypropyl trimethoxysilane] were added and kneaded well with an open kneader for 3 hours. The coarsely dispersed viscous liquid was dried at 70 ° C. for 24 hours to remove water, and then heat-treated at 110 ° C. for 1 hour to produce surface-treated magnetic particles.

Subsequently, the mixture was kneaded again in an open kneader for 4 hours according to the following formulation. The above-mentioned surface-treated magnetic particles 855 g Diacetyl cellulose 25.3 g Methyl ethyl ketone 136.3 g Cyclohexanone 136.3 g

Finally, the sandmill (1/1 /
(4G sand mill) at 2,000 rpm for 4 hours. As the medium, glass beads having a diameter of 1 mm were used. The above kneading liquid 45 g Diacetyl cellulose 23.7 g Methyl ethyl ketone 127.7 g Cyclohexanone 127.7 g

(2) Preparation of Magnetic Substance-Containing Intermediate Further, a magnetic substance-containing intermediate liquid was prepared according to the following formulation. The above-mentioned fine dispersion of magnetic substance 674 g Diacetyl cellulose solution 24280 g (solid content: 4.34%, solvent: methyl ethyl ketone / cyclohexanone = 1/1) Cyclohexanone 46 g After mixing these, the mixture was stirred with a disper and mixed with “magnetic substance”. A "containing intermediate liquid" was prepared.

[Dispersion a] Sumicorundum AA-1.5
(Average primary particle size 1.5 μm, specific surface area 1.3 m ² /
g) Preparation of Particle Dispersion (Abrasive) An α-alumina abrasive dispersion used in the present invention with the following formulation was prepared. Sumicorundum AA-1.5 152 g Silane coupling agent KBM903 (manufactured by Shin-Etsu Silicone) 0.48 g Diacetyl cellulose solution 227.52 g (solid content 4.5%, solvent: methyl ethyl ketone / cyclohexanone = 1/1) ) A ceramic-coated sand mill (1/4)
G with a sand mill) at 800 rpm for 4 hours. As the media, zirconia beads having a diameter of 1 mm were used.

[Dispersion b] Colloidal silica particle dispersion (fine inorganic particles) The fine inorganic particle dispersion used in the present invention is manufactured by Nissan Chemical Industries, Ltd.
“MEK-ST” was used. This means that the average primary particle diameter is 0.015 μm using methyl ethyl ketone as a dispersion medium.
m, with a solids content of 30%.

(3) Preparation of Second Layer Coating Solution The above-mentioned magnetic substance-containing intermediate solution 19053 g diacetyl cellulose solution 264 g (solid content: 4.5%, solvent: methyl ethyl ketone / cyclohexanone = 1/1) colloidal silica dispersion “MEK -ST "[dispersion b] 128 g AA-1.5 dispersion [dispersion a] 12 g Millionate MR-400 (manufactured by Nippon Polyurethane Co., Ltd.) 203 g (solid content 20%, diluent solvent: methyl ethyl ketone / (Cyclohexanone = 1/1) methyl ethyl ketone 170 g cyclohexanone 170 g

(4) Second Layer Coating The above-mentioned second layer coating solution was applied to a wire bar with 29.3 cc.
/ M²Coated and dried at 120 ° C. Of the magnetic layer after drying
The thickness is 1 μm and the amount of magnetic material is 60 mg / m ², Polishing
The dosage is 6 mg / m², 50 mg / m for fine inorganic particles²When
became.

3) Third layer (including higher fatty acid ester slip agent)
(1) Preparation of stock solution of slip agent Dissolve the slip agent by heating at 100 ° C with the following formula
After that, it is added to the solution A and dispersed with a high-pressure homogenizer,
A dispersion stock of a slip agent was prepared. Solution A Higher fatty acid ester slip agent below (Compound 3-14) 399 parts by weight C₆H₁₃CH (OH) (CH_Two)_TenCOOC₅₀H₁₀₁  The following compound 171 parts by weight nC₅₀H₁₀₁O (CH_TwoCH_TwoO)₁₆H Cyclohexanone 830 parts by weight A Liquid Cyclohexanone 8600 parts by weight

(2) Preparation of Spherical Inorganic Particle Dispersion [Dispersion c] A spherical inorganic particle dispersion was prepared according to the following formulation. 93.54 parts by weight of isopropyl alcohol 5.53 parts by weight of silane coupling agent KBM903 (manufactured by Shin-Etsu Silicone Co.) 88.00 parts by weight of sea hoster KEP50 88.00 parts by weight (amorphous spherical silica, average particle diameter 0.5 μm, Nippon Shokubai Co., Ltd.) After stirring these for 10 minutes, the following is further added. Diacetone alcohol 252.93 parts by weight following anionic surfactant _{n-C 4 H 9 CH (} C 2 H 5) CH 2 OCOCH (SO 3 Na) CH 2 - COOCH 2 CH (C 2 H 5) C 4 H ₉ -n 2.87 parts by weight While the solution was cooled with ice and stirred, an ultrasonic homogenizer “SONIFIER450 (BRANSON CORPORATION)
3) for 3 hours to complete [Dispersion c].

(3) Preparation of Third Layer Coating Solution The following was added to 542 g of the above-mentioned slip agent dispersion stock solution to prepare a third layer coating solution. Diacetone alcohol 5950 g Cyclohexanone 176 g Ethyl acetate 1700 g Dispersion of sea hoster KEP50 [dispersion c] 124 g FC431 2.65 g (3M Co., Ltd., solid content 50%, solvent: ethyl acetate) BYK310 5.3 g (BYK Chem Japan Co., Ltd., solid content 25%)

(4) Third Layer Coating The above third layer coating solution was applied to the second layer at 10.35 cc / m
² and dried at 110.degree. C. and further dried at 97.degree. C. for 3 minutes.

4) Silver halide emulsion layer (photosensitive layer)
Coating The coating of the silver halide emulsion layer is described in JP-A-9-152678.
A multilayer color negative photosensitive material sample was prepared by the method described in
Was prepared. The outermost protective layer described in that
Is as follows, and the number is g / m ²Application in units
Indicates the amount. Here, B-1 and B-2 are mat particles.

Fourteenth layer (second protective layer) H-1 0.40 B-1 (diameter 2.1 μm) 0.06 B-2 (diameter 2.2 μm) 0.09 B-3 0.13 S- 1 0.20 Gelatin 0.70

[0086]

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5) Sample Cutting, Punching, and Rolling-in of Cartridge The prepared sample was cut into a width of 24 mm, punched, and stored in an APS cartridge. In this APS cartridge, a perforated sample is attached to a spool and housed so as to be wound around, and the sample can be sent out of the cartridge by rotating the spool.

As described above, and as shown in Table 1, samples were prepared by changing the type and amount of the slip agent and the type and amount of the spherical particles. The spherical particles were prepared in exactly the same manner except that the dispersion of the spherical inorganic particles (Seahosta KEP50) added to the third layer coating solution was reduced and the spherical organic polymer particle dispersion described below was added. Tospearl 105 (manufactured by Toshiba Silicone Co., Ltd., spherical crosslinked polysiloxane particles, average particle size 0.5 μm) 60 g methyl ethyl ketone 120 g cyclohexanone 120 g (solid content 20%, solvent: methyl ethyl ketone / cyclohexanone = 1/1) While stirring, the ultrasonic homogenizer “SONI
And FIER450 (manufactured by BRANSON) for 2 hours.

[0089]

[Table 1]

6) Evaluation of Samples Prepared [1] Measurement of Static Friction Coefficient and Dynamic Friction Coefficient The developed samples were developed by variously adjusting the conductivity of the N4 liquid in Fuji Photo Film's CN-16X chemical formulation. Processing was performed. The developing machine used was a mini-lab-type automatic developing machine FP-922 manufactured by Fuji Photo Film Co., Ltd. The coefficient of friction was determined by a method described in JP-A-7-181638 after controlling the humidity at 25 ° C. and a humidity of 60% RH for 1 hour.

[2] Evaluation of Magnetic Input / Output Performance The produced APS cartridge sample was photographed using an APS camera “EPION300” manufactured by Fuji Photo Optical Co., Ltd., and the photographing conditions were magnetically recorded on the transparent magnetic recording layer. This was developed by adjusting the conductivity of the N4 solution to 1650 μScm ^{-1 in} the CN-16X chemical formulation of Fuji Photo Film. The developing machine used was a mini-lab-type automatic developing machine FP-922 manufactured by Fuji Photo Film Co., Ltd., and the sample after the development processing was wound into a cartridge using a retoucher “AT-100” manufactured by Fuji Photo Film Co., Ltd. Using a negative carrier "NC240S" manufactured by Fuji Photo Film Co., Ltd., 40 samples were run at normal temperature and 60% RH, and the magnetic performance was evaluated. Under the above-mentioned processing conditions, an extremely large amount of the dried liquid of the processing liquid adheres to the surface of the magnetic recording layer, so that the improvement of the magnetic recording characteristics can be easily evaluated. A magnetic output error was determined when the reproduced magnetic output decreased to 70% of the ideal value when the magnetic head was free of dirt. No output reduction up to 40 lines: ○ Occurred at 30 to 39 output drops: ○ △ Occurred at 20 to 29 output drops: Δ Occurred at 10 to 19 output drops: Δ × 1 to 9 output drops Occurred in the book: × In addition, dirt on the head after 40 runs was observed.

[3] Evaluation of Transparency Transparency was determined by measuring the haze at the time when the undercoat layer and the first to third layers were applied, and judging good or bad according to the following criteria. The measurement was performed using a haze meter “VG” manufactured by Nippon Denshoku Industries Co., Ltd.
S-1001DP ", the incident light was measured so as to enter from the transparent magnetic recording layer side. The haze is defined as follows. T = D + PT T: Total transmittance H = (D / T) × 100 (%) D: Diffusion PT: Parallel transmittance

From the results in Table 2, it can be seen that even when the sample no. 1 contained the slip agent, the spherical inorganic particles and the spherical organic polymer particles, the sample no. Was out of the range defined by the relational expressions (1) and (2). No. 7 has poor magnetic performance (magnetic input / output characteristics) and is unsuitable as a magnetic recording photographic photosensitive medium. In addition, the content of the spherical inorganic particles and the spherical organic polymer particles was large, and the sample no. 3 was out of the range of the relational expressions (1) and (2). 2 is inferior in magnetic performance,
It shows that the transparency is poor and it is unsuitable as a photographic light-sensitive material. The sample no. Containing no spherical inorganic particles and spherical organic polymer particles. 10, sample no. Containing no higher fatty acid ester slip agent. 11 is out of the range defined by the relational expressions (1) and (2), indicating that the magnetic performance is inferior. On the other hand, the sample of the present invention has excellent transparency and good magnetic performance, and in particular, the sample no. 3 satisfying the relational expressions (3) and (4). 3 to 6 have no head dirt,
It can be seen that the magnetic performance is extremely excellent.

[0094]

[Table 2]

[0095]

The transparent magnetic recording photographic photosensitive medium according to the present invention comprises:
Even when a large number of magnetic inputs / outputs are performed not only on the pre-developed product but also on the developed product, there is an excellent effect that reliable magnetic input / output is possible.

Claims (5)

[Claims] 1. A transparent magnetic recording comprising a support having a magnetic recording layer containing at least one magnetic particle on a support, and at least one photosensitive silver halide emulsion layer on the side opposite to the magnetic recording layer. In the layered photographic medium, the static friction coefficient (μs) and the dynamic friction coefficient (μk) between the side of the magnetic recording layer and the emulsion layer at 25 ° C. and 60% RH at 25 ° C.
A transparent magnetic recording photographic medium characterized by satisfying the following relational expressions (1) and (2). Equation (1) 0.18 ≦ μs ≦ 0.50 Equation (2) 0.34 ≦ μk / μs <0.70 2. The transparent magnetic recording photographic medium according to claim 1, wherein said coefficient of static friction (μs) and said coefficient of dynamic friction (μk) satisfy the following relational expressions (3) and (4). Equation (3) 0.36 ≦ μs ≦ 0.48 Equation (4) 0.38 ≦ μk / μs ≦ 0.64 3. The transparent magnetic recording photographic medium according to claim 1, wherein the magnetic recording layer contains spherical inorganic particles and / or spherical organic polymer particles. 4. The photographic photosensitive medium according to claim 1, wherein the magnetic recording layer contains at least one kind of higher fatty acid ester slip agent. 5. The transparent magnetic recording photographic medium according to claim 1, wherein said support is a polyester support.