JP3107856B2 - Recyclable magnetic recording medium and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording medium and a method for manufacturing the same, and more particularly to a magnetic recording medium comprising a paper or film support and a magnetic layer, which has good magnetic properties when used. The present invention relates to a recyclable non-disk-shaped magnetic recording medium in which a magnetic layer can be easily separated from a support and the support can be reused, and a method for manufacturing the same.

[0002]

2. Description of the Related Art A magnetic recording medium represented by a magnetic ticket, a magnetic card, a magnetic ticket, a prepaid card, etc. includes a support such as a plastic film, a non-magnetic metal plate or foil, paper or paper laminated with polyolefins. It is known that a magnetic layer mainly composed of a magnetic substance and an electron beam-curable binder is provided thereon. These magnetic recording media may remain at the user's hand after use, or may remain at the ticket issuer side. That is, magnetic tickets, betting tickets, and some prepaid cards are examples of the latter. With the increasing awareness of global environmental protection in recent years, just as conventional paper tickets and betting tickets have been collected and reused as paper, methods for reusing magnetic recording media have been studied. I have.

[0003] However, compared to the conventional paper tickets and the like which are easily separated again by an alkaline bath to produce recycled (recycled) pulp, there is a great obstacle to recycling of magnetic recording media. That is, the magnetic layer adheres to the support for the purpose of enhancing its recording characteristics and repetitive usability, and its adhesion is made very strong so that the magnetic layer is not peeled off by mechanical force, and magnetic recording is performed. Since the medium is required to have water resistance, the magnetic layer alone cannot be peeled off with a general alkali bath, but the conditions are severe enough to peel and decompose the magnetic layer (high alkali concentration, high temperature bath, mechanical stirring).
When the magnetic layer is peeled off by separation, the support itself is separated and decomposed, which makes it extremely difficult to separate the components constituting the magnetic layer from the components (for example, paper and polyester resin) constituting the support. was there. If the separation at the time of recycling is to be simplified, the adhesion and the adhesion between the magnetic layer and the support are reduced, and there is a contradictory problem that the magnetic recording medium lacks reliability and repeatability. In particular, when a support in which a polyolefin resin is laminated on paper is used for the purpose of improving the recording accuracy, the separation is impossible.

[0004]

The problem to be solved by the present invention is that when a magnetic recording medium is used, the adhesion between the magnetic layer and the support is high, the magnetic recording characteristics, An object of the present invention is to provide a recyclable magnetic recording medium that has good usability and that can recycle a used magnetic recording medium so that a magnetic layer can be easily separated from a support.

[0005]

Means for Solving the Problems The present inventors have intensively studied the above problems, and as a result, have reached the present invention. That is, the present invention relates to a recyclable non-disk-shaped magnetic recording medium having a magnetic layer composed of a magnetic material and a binder containing at least one of a carboxyl group-containing resin and a phenolic hydroxyl group-containing resin on a support. Characterized in that an intermediate layer of at least one composition of a carboxyl group-containing resin and a phenolic hydroxyl group-containing resin is provided between the magnetic layer and the magnetic layer, and a method of manufacturing the same. It is. In a preferred embodiment of the present invention, the magnetic layer is cured by electron beam irradiation, and the intermediate layer is cured by ultraviolet irradiation, electron beam irradiation, or both electron beam irradiation and ultraviolet irradiation.

[0006] The magnetic layer formed on the support and comprising a magnetic material and a binder containing at least one of a carboxyl group-containing resin and a phenolic hydroxyl group-containing resin forms a strong coating layer in a neutral or acidic atmosphere. Since the magnetic layer is formed, the magnetic layer is not broken or peeled off from the support due to a slight amount of moisture, moisture, sweat, oil, or the like, so that it can be used as a magnetic recording medium. However, when treated with an alkali bath after use, the carboxyl group or phenolic hydroxyl group forms a water-soluble salt, and the film is rapidly destroyed and dispersed and dissolved in the alkali bath. Since the paper and plastic as the support are relatively stable in the alkali bath, when only the magnetic layer is dispersed and dissolved in the alkali bath, the difference between the specific gravity or the use of a magnet may be used to separate the magnetic layer and the support. Separation becomes very easy. For the purpose of improving the magnetic recording accuracy, an intermediate layer made of at least one composition of a carboxyl group-containing resin and a phenolic hydroxyl group-containing resin is provided on a support, and the magnetic layer is preferably provided after smoothing the surface. Hereinafter, the present invention will be described in detail.

[0007] At least one of the carboxyl group-containing resin and the phenolic hydroxyl group-containing resin (both are hereinafter referred to as an alkali-soluble resin) used in the magnetic layer and the intermediate layer of the present invention is, for example, a nitrocellulose resin. A resin containing a fatty acid ester, or a resin containing methacrylic acid ester, acrylic acid ester and acrylic acid, a resin containing maleic acid in an aminoalkyd resin, a resin containing a phenolic hydroxyl group such as polyparavinylphenol. And a radiation-curable alkali-soluble resin can be used. As the radiation-curable alkali-soluble resin referred to herein, those having a radiation-curable functional group and a carboxyl group or a phenolic hydroxyl group at the molecular terminal or side chain at the same time, such as trimethylolpropane diacrylate fumarate and trimethylolpropane Polyfunctional acrylates and polyfunctional carboxylic acids such as difumarate monoacrylate, acryloyloxyethyl salicylate, trimethylolpropane diacrylate monosalicylate, and pentaerythritol diacrylate monofumarate, or a complex thereof, a carboxyl group, or phenol Monoacrylate having a functional hydroxyl group, Alonix M in the trade name of Toa Gosei Chemical Industry Co., Ltd.
-5300, Aronix M-5400, Aronix M-5500, Aronix M-5600 and the like.

The alkali-soluble resin of the present invention can be used as a composition mixed with other binder components, and can be selected in consideration of the affinity with a magnetic material, an intermediate layer, or a support. Drying and curing of the alkali-soluble resin can be performed by thermal curing or curing by irradiation with radiation such as ultraviolet rays or electron beams.

The radiation-curable resin can be used as a binder component of an intermediate layer containing an alkali-soluble resin, or as a binder constituting a magnetic material composition together with a magnetic material. As the radiation-curable resin, any compound having an unsaturated bond which can be polymerized by an electron beam or an ultraviolet ray, which is generally used in this field, can be used. That is, a compound having one or more carbon-carbon unsaturated bonds, a compound containing an acryloyl group, a methacryloyl group, an acrylamide group, an allyl group, a vinyl ether group, a vinyl thioether group, and the like,
For example, alkyl acrylate, alkyl methacrylate, acrylonitrile, methacrylonitrile, acrylamide, vinyl acetate, vinyl propionate, vinyl pyrrolidone and the like can be mentioned. There may be two or more unsaturated bonds in the molecule. In particular, unsaturated esters of polyols, for example, ethylene diacrylate, diethylene glycol diacrylate, glycerol triacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate and the like can be mentioned. Compounds having one or more epoxy rings, such as glycidyl acrylate, are also preferred. Furthermore, these compounds may be high molecular weight substances. Particularly preferred are compounds having an acrylate group at the terminal or side chain of the polymer chain, such as prepolymers having a polyester skeleton, a polyurethane skeleton, an epoxy resin skeleton, a polyether skeleton, and a polycarbonate skeleton. These monomers and prepolymers may be used alone or as a mixture.

When used as a composition in which an alkali-soluble resin is mixed with another binder resin, the alkali-soluble resin is preferably at least 5% by weight based on the solid content of the composition. This is because if the proportion of the alkali-soluble resin is less than 5%, the exfoliation aptitude in an alkali bath is poor. In addition, an alkali-soluble resin curable by irradiation with radiation generally has a small volume shrinkage at the time of curing, and therefore has extremely excellent curl characteristics after the resin layer is cured.

The basis weight of the intermediate layer comprising the alkali-soluble resin composition used in the present invention is 0.5 g / m ² to 1 g / m ^2.
0 g / m ² is preferred. If the middle layer is less than this amount,
The unevenness of the support cannot be filled, and when the magnetic layer is provided, the smoothness is difficult. When the amount is more than this, peeling in an alkaline bath is poor, and the suitability of the support for recovery is deteriorated. At the time of manufacturing, it is preferable to provide a magnetic layer by performing a smoothing process using a super calender after providing the intermediate layer from the viewpoint of improving the recording accuracy. In addition, a shielding layer made of a water-soluble polymer or the like may be provided between the support and the intermediate layer for the purpose of preventing the resin constituting the intermediate layer from seeping into the support.

The support used in the present invention is typified by polymer films such as polyethylene terephthalate, polyethylene, polyvinyl chloride, and polypropylene, high-quality paper, art paper, coated paper, kraft paper, Kent paper, and pure white roll paper. General-purpose paper containing wood pulp as a main component, or nonwoven fabric or synthetic paper containing synthetic polymer fibers as a main component,
Alternatively, these are composite materials.

The base paper used as a support in the present invention may be ordinary natural pulp paper, so-called synthetic paper in which synthetic fibers or synthetic resin films are made into pseudo paper, or resin in which a water-resistant resin coating layer is provided on the surface of base paper. Coated paper can be used, but natural pulp paper mainly containing wood pulp of softwood pulp, hardwood pulp, or softwood mixed pulp is advantageously used. The thickness of the base paper is not particularly limited, but paper having good smoothness is preferable, and its basis weight is 4
0g / m ² ~250g / m ² is preferred.

In the method of the present invention, the base paper mainly composed of natural pulp, which is advantageously used, can contain various polymer compounds and additives. For example, starch derivatives, polyacrylamide, polyvinyl alcohol derivatives, dry paper strength agents such as gelatin, fatty acid salts,
Sizing agents such as rosin derivatives and dialkyl ketene dimer emulsions, wet paper strength agents such as melamine resins, urea resins, and epoxidized polyamides, stabilizers, pigments, dyes, antioxidants, fluorescent brighteners, various latexes, and inorganics An electrolyte, a pH adjuster and the like can be appropriately combined and contained.
Further, in the present invention, in order to improve the adhesiveness and wettability between the base paper and the radiation-curable resin composition, a surface treatment such as a corona treatment of the base paper surface may be performed.

In the present invention, as the polymer film used as the support, commercially available polyesters, polyolefins, polyvinyl halides, polycarbonates,
Polysulfone, cellulose ester, polyamide, polyimide resin and the like can be used, but polyester resin represented by polyethylene terephthalate is preferable in terms of flatness, rigidity and curl resistance during use.
In these films, inorganic fine particles can be kneaded or coated on the surface for the purpose of imparting opacity. Use fibrous base, non-woven or synthetic paper as other support, or laminate paper with synthetic resin laminated on one or both sides of paper, metal foil, or bonding metal foil to paper or synthetic resin film Combined products are also possible.

As the magnetic material, γ-iron oxide (III), iron oxide (II), cobalt-containing γ-iron oxide (III), cobalt-containing iron oxide (II), cobalt-coated γ-iron oxide (III), Barium ferrite is a typical example.

The magnetic composition of the present invention may contain a lubricant, an abrasive, a rust inhibitor, a dispersant, a thickener, and the like. In particular, lubricants include saturated and unsaturated higher fatty acids, fatty acid esters, higher fatty acid amides, higher alcohols, silicone oils, mineral oils, fluorine compounds, and the like, which may be added when adjusting the magnetic composition, or It may be applied or sprayed on the surface of the magnetic layer.

In preparing the magnetic material composition, the magnetic material and each of the above-mentioned components are all charged into the kneader simultaneously or individually. Various kneaders are used for kneading and dispersing the composition. For example, a two-roll, three-roll, ball mill, sand grinder, disper, high-speed impeller disperser, high-speed mixer homogenizer, etc.

The method for coating the magnetic layer and the intermediate layer on the support includes a doctor coat, a blade coat, an air knife coat, a squeeze coat, a reverse roll coat, a gravure coat, a transfer roll coat, a curtain coat, an extrusion coat, and a die coat. , A slide coat, a lip coat, a microgravure coat, and the like.

The magnetic layer coated on the support can be subjected to a treatment for orienting the magnetic substance in the layer if necessary.
The orientation treatment is performed at about 500 to 3 at a right angle to the running direction of the support or at an angle to the running direction.
It can be carried out under an AC or DC magnetic field condition of about 000 Oe.

The accelerating voltage of the electron beam used in the present invention is 100 to 1000 kV, preferably 1
50 to 300 kV, and the absorbed dose is 0.5 to 2
0 Mrad, preferably 1 to 10 Mrad. Acceleration voltage is 1
Below 00 kV, the amount of transmitted energy is insufficient,
If it exceeds 0 kV, energy efficiency is reduced and it is not economical. If the absorbed dose is smaller than 0.5 Mrad, the curing reaction becomes insufficient and a tough magnetic layer cannot be obtained. 20
If it is larger than Mrad, not only energy efficiency is lowered, but also the deformation of the film, the decomposition of the resin, and the deterioration of the paper support due to the heat generation of the irradiated object become unfavorable.

Curing by electron beam irradiation is a radical reaction and depends on the oxygen concentration in the atmosphere. Therefore, replacement with an inert gas such as nitrogen, helium or carbon dioxide is performed, and the oxygen concentration is 600 ppm or less, preferably 400 ppm or less. Irradiation is preferably performed in an atmosphere in which the temperature is suppressed. The electron beam accelerator may be, for example, any of an electro curtain system, a scanning type, a double scanning type, and the like.

As the ultraviolet irradiation device used in the present invention,
For example, there are a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, a metal halide lamp, and the like, and an ozone-less type that generates less ozone. Generally, a plurality of lamps having an output of 30 w / cm or more are used in parallel.

In the present invention, when curing the resin by irradiation with ultraviolet rays, a photoreaction initiator is mixed and used.
Examples of the photoreaction initiator include acetophenones such as di and trichloroacetophenone, benzophenone, Michler's ketone, benzyl, benzoin, benzoin alkyl ether, benzyldimethyl ketal, tetramethylthiuram monosulfide, thioxanthones, azo compounds, various silver salts, and the like. The amount of the photoreaction initiator used is usually in the range of 0.1 to 10% based on the ultraviolet curable resin. A storage stabilizer such as hydroquinone may be used in combination with the photoinitiator.

The magnetic recording medium prepared according to the present invention comprises at least a support, an intermediate layer and a magnetic layer, and further includes an intermediate layer and a magnetic recording medium at desired positions on the front side and the back side of the magnetic recording medium.
It can be provided in combination with a printing layer, a hiding layer, a polishing layer, an overcoat layer, a printing margin, a thermosensitive recording layer, an inkjet recording layer, an ink receiving layer, an optical writing layer, a repetitive writing layer, a punch hole margin, a photosensitive layer, and the like. .

[0026]

Since the magnetic recording medium of the present invention contains a resin containing a carboxyl group and / or a phenolic hydroxyl group in the binder component for adhering the magnetic substance, it has good water resistance after drying and curing, and has good water resistance after being dried. It can be used as a magnetic recording medium having high adhesion and adhesion, and excellent magnetic recording characteristics and repetitive usability. When a used magnetic recording medium is recycled, since the magnetic layer contains a resin containing a carboxyl group and / or a phenolic hydroxyl group, the magnetic layer is neutralized and solubilized by an alkali, and the magnetic layer is easily supported. From the substrate, making it possible to recover only the support.

[0027]

Next, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the content of the present invention is not limited to Examples. It should be noted that all “parts” in the examples indicate “parts by weight”.

Reference Example 1 As a support, the surface was clay-coated and the basis weight was 170 g /
A magnetic material composition containing an alkali-soluble resin was prepared at the following composition ratio using a single-sided glossy paper of m ² . [Magnetic material composition] Magnetic substance: Barium ferrite (manufactured by Toda Kogyo) 100 parts Alkali-soluble resin: polyacrylic acid dimer (product of Toa Gosei Chemical Industry Co., Ltd., trade name: Aronix M-5600) 30 parts Binder: diisocyanuric acid Acrylate (product of Toa Gosei Chemical Industry Co., Ltd., trade name: Aronix M-215) 10 parts Silane coupling agent (A-1100 manufactured by Nippon Yunika) 1 part Carbon black 5 parts A magnetic material composition having the above composition is automatically prepared. 24 in a mortar
After kneading for an hour, the solid content is applied to the support by a microgravure coater so as to have an applied amount of 30 g / m ^2, and after orientation by a cobalt magnet, a curing treatment is performed by an electron beam irradiator (substituted with nitrogen). The magnetic recording medium was obtained by supercalendering with an absorption dose of 200 KV and 3 Mrad using Nissin High Voltage Co., Ltd., Curetron.

Example 1 As a support, the surface was clay-coated and the basis weight was 170 g /
An alkali-soluble resin composition was applied using a gravure coater at the following composition ratio using a glazed paper of m ² to obtain an intermediate layer. [Alkali-soluble resin composition] Alkali-soluble resin: polyacrylic acid dimer (product of Toa Gosei Chemical Industry Co., Ltd., trade name: Aronix M-5600) 68 parts Binder: isocyanuric acid diacrylate (a product of Toa Gosei Chemical Industry Co., Ltd.) Trade name: Aronix M-215) 30 parts Photoinitiator: benzyl dimethyl ketal (Ciba Geigy K.K., product name Irgacure 651) 2 parts

The thus obtained alkali-soluble resin composition is applied to a support, and the resultant is applied to an ultraviolet irradiation device (80).
W / cm, manufactured by Ushio Electric Co., Ltd., wrapped cure) and irradiated with ultraviolet rays to obtain a support having an intermediate layer. The following magnetic material composition was prepared in the same manner as in Reference Example 1, and applied to the support having the intermediate layer. [Magnetic material composition] Magnetic substance: barium ferrite (manufactured by Toda Kogyo) 100 parts Alkali-soluble resin: polyparavinylphenol 30 parts Binder: isocyanuric acid diacrylate (product name, Alonix M-215, product of Toa Gosei Chemical Industry Co., Ltd.) 10 parts Silane coupling agent (A-1100 manufactured by Nippon Yunika) 1 part Carbon black 5 parts After applying the magnetic material composition, it is cured by electron beam irradiation in the same manner as in Reference Example 1, and then subjected to a supercalender treatment to obtain a magnetic material. A recording medium was obtained.

Example 2 As a support, the surface was clay-coated and the basis weight was 170 g /
An alkali-soluble resin composition was applied using a gravure coater at the following composition ratio using a glazed paper of m ² to obtain an intermediate layer. [Alkali-soluble resin composition] Alkali-soluble resin: trimethylolpropane diacrylate monosalicylate 70 parts Binder: isocyanuric acid diacrylate 30 parts The thus obtained alkali-soluble resin composition is applied to a support, and Was cured by an electron beam irradiation apparatus in which nitrogen was replaced by nitrogen at an absorption dose of 200 KV and 1.5 Mrad to obtain a support having an intermediate layer. A magnetic material composition containing an alkali-soluble resin was prepared at the following composition ratio. [Magnetic material composition] Magnetic material: Barium ferrite (manufactured by Toda Kogyo) 100 parts Alkali-soluble resin: Styrene / polyacrylic acid copolymer emulsion 30 parts (solid content) Binder: urethane acrylic emulsion 10 parts (solid content) Silane cup Ring agent (A-1100, manufactured by Nippon Yunika) 1 part Carbon black 5 parts
After kneading for a time and applying the solid content to the support by a microgravure coater so as to have an applied amount of 30 g / m ² and orienting it with a cobalt magnet, a curing treatment is performed by heat curing in a 60 ° C. hot oven. The magnetic recording medium was obtained by performing a super calendar process.

Example 3 A white PET (1) in which a support was subjected to corona treatment from plain paper
A magnetic recording medium was obtained in the same manner as in Example 1, except that the thickness was changed to 80 μm.

Comparative Example 1 As a support, the surface was clay-coated and the basis weight was 170 g /
Using a single-sided glossy paper of m ² , the magnetic material composition was adjusted at the following composition ratio. [Magnetic material composition] Magnetic material: Barium ferrite (manufactured by Toda Kogyo) 100 parts Binder: styrene / butadiene copolymer latex (manufactured by Asahi Dow: Dow 620) Product name Aronix M-5600) 33 parts Binder: isocyanuric acid diacrylate (Toa) Synthetic Chemical Industry Co., Ltd., Silane coupling agent (A-1100, manufactured by Nippon Yunika) 1 part Carbon black 5 parts The magnetic material composition having the above composition is mixed with an automatic mortar for 24 hours.
After kneading for a time and applying the solid content to the support by a microgravure coater so as to have an applied amount of 30 g / m ² and orienting it with a cobalt magnet, a curing treatment is performed by heat curing in a 60 ° C. hot oven. The magnetic recording medium was obtained by performing a super calendar process.

Comparative Example 2 White PET (1) in which a support was subjected to corona treatment from plain paper
A magnetic recording medium was obtained in the same manner as in Comparative Example 1 except that the thickness was changed to 80 μm.

Examples 1 to 3, Reference Example 1 and Comparative Example 1,
The following tests were performed on the magnetic recording medium prepared in 2, and the results are shown in Table 1.

Test 1 (Alkali Peelability) The magnetic recording media of Examples, Reference Examples and Comparative Examples were vertically 5.7.
cm, 3 cm in width, immersed in 70 ° C., 1N sodium hydroxide solution, stirred, and judged by the time required to peel off the magnetic layer. When the magnetic layer peels off within one minute,
The case where it took longer than 1 minute was represented by the mark x.

Test 2 (Support Recoverability) At the stage when the magnetic layer was peeled off in Test 1, the remaining support was recovered, dried, weighed, and expressed as a percentage in comparison with the weight of the original support.

Test 3 (Magnetic Properties) The samples obtained in Examples, Reference Examples and Comparative Examples were cut into 5 mm squares, and the maximum magnetization (Mm) and the residual magnetization (Mr) were measured using a vibrating magnetometer. The squareness ratio (Rs) of the sample was determined by the following equation (1). A squareness ratio closer to 1 is an ideal magnetic recording medium.

[0039]

## EQU1 ## Rs = Mr / Mm

Test 4 (Repeatability) The samples obtained in Examples, Reference Examples and Comparative Examples were passed 100 times through a commercially available reader / writer device, and the maximum magnetization (Mm) was measured using a vibrating magnetometer. The repetition characteristics were evaluated based on the ratio (percentage) of the value of the first time to the value of the 100th time.

Test 5 (Water Resistance) A few drops of water were dropped on the magnetic surfaces of the samples obtained in Examples, Reference Examples and Comparative Examples, and the samples were rubbed ten times with a cotton swab and evaluated with a stain on the cotton swab. When the swab was barely seen by the naked eye, the water resistance was indicated by a mark 耐 as good water resistance, and when the cotton swab was clearly stained was indicated by a mark X as poor water resistance.

[0042]

[Table 1]

Evaluation As is clear from Table 1, the magnetic recording medium according to the present invention not only has good magnetic recording characteristics, but also has good magnetic layer peeling in an alkaline bath at the time of recovery, and has a high support. Shows the recoverability of Since the separated magnetic layer has a high specific gravity, it can settle down or be thickened by a magnet when left to stand, and it is easy to collect only the support. On the other hand, in a similar experiment, the sample of the comparative example in which the carboxyl group or the phenolic hydroxyl group was not contained in the magnetic layer had poor alkali releasability, and a considerable portion of the support was observed at the stage when the magnetic layer was separated. Has been lost.

[0044]

The recycle magnetic recording medium according to the method of the present invention, when used, has high adhesion and adhesion between the magnetic layer and the support, good magnetic recording characteristics, and good repetitive use. When the used magnetic recording medium is recycled, the magnetic layer can be easily separated from the support, and the support alone can be easily collected and reused, from the viewpoint of environmental protection and resource saving, or the amount of waste. From the viewpoint of reducing the industrial value.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-2-185710 (JP, A) JP-A-57-44227 (JP, A) JP-A-1-92926 (JP, A) JP-A 64-64 46227 (JP, A) JP-A-63-279428 (JP, A) JP-A-3-203015 (JP, A) JP-A-2-278511 (JP, A) JP-A-3-242820 (JP, A) JP-A-63-231723 (JP, A) JP-A-62-146432 (JP, A) JP-A-59-8127 (JP, A) JP-A-5-65262 (JP, A) JP-A-2- 203420 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G11B 5/702 G11B 5/738

Claims (4)

(57) [Claims] 1. A recyclable non-disk magnetic recording medium having a magnetic layer composed of a magnetic material and a binder containing at least one of a carboxyl group-containing resin and a phenolic hydroxyl group-containing resin on a support. A recyclable non-disk-shaped magnetic recording medium, wherein an intermediate layer made of at least one composition of a carboxyl group-containing resin and a phenolic hydroxyl group-containing resin is provided between the magnetic layers. 2. An intermediate layer comprising at least one composition of a carboxyl group-containing resin and a phenolic hydroxyl group-containing resin on a support, and a binder containing at least one of a carboxyl group-containing resin and a phenolic hydroxyl group-containing resin. A method for manufacturing a recyclable non-disk-shaped magnetic recording medium, comprising sequentially providing a magnetic layer made of a magnetic material. 3. The method according to claim 2, wherein the magnetic layer is cured by electron beam irradiation, and the intermediate layer is cured by ultraviolet irradiation. 4. The recyclable non-disk magnetic recording according to claim 2, wherein said magnetic layer is cured by electron beam irradiation, and said intermediate layer is cured by electron beam irradiation or electron beam irradiation and ultraviolet irradiation. The method of manufacturing the medium.