JP6410531B2 - Magnet film manufacturing method and magnet film card using the product - Google Patents

Description

  The present invention is applied to a magnetic film in which a magnetic coating material comprising a hard magnetic material powder, an organic polymer elastomer as a binder and a solvent as main components is applied to one side of a support and dried to form a magnetic coating film. The present invention relates to a magnetized film. Thus, the magnet film is used for the display of a bulletin board, the cover of the indoor wall surface, various cards and the like.

A magnetic film in which a magnetic layer is formed using a conventional magnetic paint, the magnetic paint is applied to one side of the support, and the axis of easy magnetization of the anisotropic hard magnetic material powder is parallel to the support surface (in-plane direction) Are magnetically oriented.
In order to perform multipolar magnetization on the magnetic film, the magnetic pole direction of the multipolar magnetization is perpendicular to the orientation direction of the easy magnetization axis of the anisotropic hard magnetic material powder so that the direction of the magnetic flux is the easy magnetization axis direction. It is an indispensable condition to be magnetized. However, depending on the application, it is very inconvenient that the magnetic pole direction cannot be changed. Prior art documents include the following patent documents, but all use the in-plane orientation technique.

Japanese Patent Publication No. 63-6128 JP 2001-76920 A Japanese Patent No. 3271620 Japanese Patent No. 3297807 Japanese Patent No. 3309854 Japanese Patent No. 3309855 Japanese Patent No. 3326690 Japanese Patent No. 3429503

  Conventional anisotropic magnet films have a strong magnetic attraction compared to thin-layer magnets, and since they are thin layers, they are said to be easy to print and lightweight and have excellent handling properties. At times, as the application expands, it is considered as a problem that it is difficult to align the four corners by magnetically adhering the front and back to touch when multiple sheets are cut into a standard size and handled in layers. It came to be strongly demanded. The present invention solves this problem and the like.

As a result of various investigations to solve the above problem, when the magnetic sheets (cards) cut to a fixed size overlap each other, the magnetic pole directions overlap when both are in the same pole, Or, for the inconvenience that magnetic attraction force occurs between the back surfaces or between the front and back surfaces, magnetizing the poles of the multipolar magnetization irregularly , and crossing the magnetic pole directions of both The mutual magnetic attraction force is reduced, and the effect of reducing the magnetic attraction force between the two sides is further improved by irregularly changing the poles of multipolar magnetization and crossing the magnetic pole directions.

In addition, the magnetic film is magnetized in an oblique direction along the magnetic poles by magnetic attraction with different polarities by magnetizing the magnetic poles of the multipolar magnets irregularly. The end part that protrudes in the process of aligning the end part against the force is applied to the table surface (FIG. 19). In order to prevent deformation or damage caused by impact or the like, support bodies (films) are provided on both sides of the magnet film. And the occurrence of wave deformation due to magnetic attraction between adjacent different poles when magnetizing by irregularly changing between the poles of multipolar magnetization (Fig. 15). It has been found that the effect of preventing is great (FIG. 16), and that it has the effect of reducing the magnetic attractive force between the two as a whole.

Also, using a magnet film by the conventional in-plane magnetic field orientation technology, one side of a rectangular standard product is at an arbitrary angle within a predetermined range with respect to the magnetic field orientation direction so that the magnetic pole directions intersect when they are stacked. By cutting, there is means (Fig. 17) that makes the original fabric become the same as the one that is obliquely magnetized at an arbitrary angle within a predetermined range. There is an inconvenience that produces a part that cannot be done and it is uneconomical.
With respect to this inconvenience, the present invention provides a magnetic film that does not produce a difference in magnetic attractive force even when the magnetic pole direction is changed by 0 to 360 degrees by adopting a vertical magnetic field orientation (FIGS. 4 and 5). It came to complete.

(1) Anisotropic ferrite system, which is a solid component after drying a magnetic coating mainly composed of anisotropic ferrite hard magnetic material powder and an organic polymer elastomeric varnish that is a binder. When the amount of the anisotropic ferrite hard magnetic material powder is 50 to 65% by volume based on the total amount of the hard magnetic material powder, the organic polymer elastomer and the processing aid, the thickness after drying becomes 40 to 250 μm. Non-magnetic guide roll at a position approaching the lower pole (S pole) side between the opposite N pole face and the S pole face of the upper and lower NS pole type vertical magnetic field aligning device installed in front of the drying furnace. Is attached so that the support to which the magnetic coating is applied passes through the position approaching the south pole, and is magnetically attracted to the south pole side so that a magnetic field of 1000 to 2500 Oe is stably applied. Ferrite hard magnetic material powder It is possible to magnetically orient the magnetic pole in the direction perpendicular to the support surface and form a magnetic coating film with a flat surface after drying so that the magnetic pole direction can be freely multipolarized on one or both sides. It is set as the manufacturing method of the magnet film characterized by these .

(2) Polyethylene terephthalate-based synthetic paper mainly composed of an anisotropic ferrite-based hard magnetic material powder as a magnetic paint and an organic polymer elastomer-based varnish as a binder on one side of a support having a thickness of 40 to 220 μm. The filling amount of the anisotropic ferrite hard magnetic material powder is 50 to 65 volumes with respect to the total amount of the anisotropic ferrite hard magnetic material powder, the organic polymer elastomer and the processing aid, which are solid components after drying. Is applied between the N pole surface and the S pole surface of the vertical NS magnetic field aligning device installed in front of the drying furnace. A non-magnetic guide roll is attached at a position approaching the pole (S pole) side, and a support coated with a magnetic coating is passed through a position approaching the S pole, and is magnetically attracted to the S pole side and stably 1000 ~ 2500 magnetic film by the magnetic field oriented magnetization easy axis of the anisotropic ferrite type hard magnetic material powder support surface perpendicular direction as the magnetic field of the e is applied and dried to the surface by forming a flat magnetic layer In addition,
Laminating the same film as the support or laminating the magnetic coatings of the magnetic film together to give the wavy deformation adsorption resistance and the corner end deformation resistance as a magnetic film having a support on both sides,
Permanent magnet type magnetized roll or one-turn with irregular distance between poles with multi-pole magnetized magnetic pole direction on one or both sides parallel to the flow direction of the film coated with magnetic layer by coating machine When magnetizing the magnet film using the magnetized yoke, the distance between the poles of multipolar magnetization is irregularly magnetized so that the centers of the N and S poles of the magnet films do not overlap. Magnetic film with reduced magnetic attractive force between the magnet films of the film, evaluated by the following wave deformation deformation adsorption test and corner end deformation resistance test: corner end deformation resistance, wave resistance suitable for ◎ mark the magnetic film having excellent droplet deformation adsorptive is obtained a method of manufacturing a magnet film characterized.

1. Wave-resistant deformation adsorption test method Existence of wave-shaped deformation adsorption after two magnet films, which are test samples (100 x 150 mm), are stacked and left in a hot air circulation thermostat at 38 to 42 ° C for 7 days. Observe the four-level evaluation. )
◎: No undulations are observed. ○: Almost no undulations are observed. Δ: Some undulations are observed. X: The undulations are observed. 2. Test method for resistance to deformation at corner edges. Two cards made of magnetic film, which is a test sample (100 × 150 mm), are stacked on top of each other, and the front and back sides are at an angle (the magnetic pole direction overlaps) that maximizes the magnetic attractive force between the cards within a magnetic pole direction of 360 °. Magnetically adsorb. In addition, in order to align the irregular cards in which a total of 10 cards were stacked in the same manner sequentially against the magnetic attractive force, the alignment was repeated three times by placing the four sides one by one against the flat surface of the table. Then, the four-level evaluation is performed by visually observing the deformation of the corner ends and the degree of scratches.
A: Deformation is not recognized. O: Deformation is hardly recognized. Δ: Deformation is slightly recognized. X: Deformation is recognized.

(3) The amount of the anisotropic ferrite hard magnetic material powder in the magnetic coating film is 50 to 65% by volume, and the thickness of the magnetic coating film is 40 to 250 μm. The method for producing a magnet film according to any one of claims 1 and 2, wherein multipolar magnetization of 1 to 2.5 mm is performed.

(4) The support of the magnetic film having the support on both sides is a polyethylene terephthalate synthetic paper having a thickness of 40 to 60 μm, a thickness of the magnetic coating film of 80 to 100 μm, a magnetic adsorption force of 0.5 to 2.0 g / cm ² , It is set as the manufacturing method of the magnet film of any one of Claim 2 or 3 characterized by being self weight 480g / m < ² > or less .

(5) The method for producing a magnet film according to any one of claims 1 to 4, wherein the non-coated surface of the support is a printable or erasable surface .

(6) A magnetic film card using the magnetic film obtained by the method for manufacturing a magnetic film according to any one of claims 1 to 5 is used .

The present invention makes the distance between each pole of multipolar magnetization irregular as a measure for reducing mutual magnetic attraction by superimposing cards using a magnetic film subjected to multipolar magnetization. Or inconvenience caused by crossing the magnetic poles.

In other words, in order to reduce the magnetic attraction force by making the distance between each pole of multipolar magnetization irregular , or by crossing the magnetic poles, by providing supports on both sides, the magnetic attraction force can be reduced. This prevents the film from being deformed and damaged by end impacts and automatic feeders that align the four corners against each other, and prevents wavy deformation from being attracted by different polar magnetic attraction between poles. The effect of reducing the overall magnetic attractive force is improved. That is, the mutual magnetic attractive force at the time of overlapping is weak and easy to handle, and the effect of preventing deformation and scratching of the magnet film can be obtained.

Further, since the magnet film of the present invention is a magnet film oriented in a vertical magnetic field, there is an advantage that even if the magnetic pole direction is changed in the range of 0 to 360 degrees, there is no difference in magnetic attractive force. That is, since the conventional in-plane magnetic field oriented magnet film needs to be magnetized in the direction perpendicular to the in-plane magnetic field orientation direction, it is necessary to be inclined and cut so as to correspond to gradient magnetization. However, the magnetic film of the present invention has the advantage that it does not need to be inclined and is economical.
Further, since a known permanent magnet type magnetized roll manufactured by a method of tightening a disk-shaped magnet through a shaft can be used, the manufacture is easy and economical.

It is a cross-sectional schematic diagram which shows the basic composition of this invention. (A) shows that a magnetic layer in which magnetic powder is oriented in a vertical magnetic field is formed on one side of a support, and then a film similar to the support is laminated, and (b) shows another method of supporting the support. It is a cross-sectional schematic diagram which shows that after forming the magnetic layer by which the magnetic powder orientated by the perpendicular magnetic field on one side of this, the magnetic layer surfaces are bonded together. It is a cross-sectional schematic diagram which shows the precursor of the said FIG. (A) corresponds to (a) in FIG. 1, and (b) corresponds to (b) in FIG. It is a side surface schematic diagram which shows an example of the coating machine (coater) which attached the perpendicular magnetic field orientation apparatus. It is a side surface schematic diagram which shows a perpendicular magnetic field orientation apparatus. It is a schematic diagram (perspective view) showing one of anisotropic ferrite particles that are magnetically oriented in the vertical direction in the magnetic layer. It is a side surface schematic diagram which shows an example of a dry laminator. It is a side surface schematic diagram which shows an example of a thermal laminator. FIG. 4 is a schematic diagram (perspective view) showing a state in which the magnetic flux from the magnetized yoke is in the easy axis (C) direction for one of the anisotropic ferrite particles that are magnetically oriented in the vertical direction in the magnetic layer. is there. It is a schematic diagram (perspective view) showing an example of a permanent magnet type magnetizing roll. It is a side surface schematic diagram which shows an example which forms a magnetic flux of an up-down direction and magnetizes both surfaces using two permanent magnet type | mold magnetizing rolls. It is a top view which shows the state which magnetized irregularly between the magnetic poles given to the magnet film of this invention. It is the cross section (side surface) schematic diagram which magnetized similarly to between the magnetic poles (equal intervals) of the conventional magnet film. It is a cross-sectional (side) schematic diagram showing a state in which two magnetized magnets in the same manner as between the magnetized magnetic poles (equal intervals) of a conventional magnet film are magnetically attracted by contacting the magnetized surface and the back surface (non-magnetized). is there. It is a cross section (side surface) schematic diagram which shows the state which two sheets which magnetized irregularly between the magnetic poles given to the magnet film of this invention touched, and were magnetically attracted, (a) The back surface (non-magnetized) is shown in a magnetically attracted state, and (b) shows the magnetized surface in a magnetically attracted state. It is a conceptual schematic cross section which shows partial adsorption | suction among the waves produced when the surface and back surface of magnet films which provided the support body on the surface (one side) were piled up and made to magnetically adsorb | suck. (Description of the opposite magnetic pole not directly involved in the magnetic adsorption of the two is omitted) It is a conceptual schematic cross section which shows the magnetic attraction | suction state which does not produce partial adsorption | suction among waves, when the magnetic film which provided the support body on both surfaces overlap | superposed and adsorb | sucked magnetically. (Description of the opposite magnetic pole not directly involved in the magnetic adsorption of the two is omitted) FIG. 5 is a schematic top view showing that a conventional magnetic film oriented in-plane magnetic field orientation is cut with an inclination with respect to the magnetic field orientation direction in a manner similar to that obtained by subjecting a standard product to gradient magnetization. It is a schematic top view showing the reason why the magnetic attractive force is weakened when the magnetized surface and back surface (non-magnetized) of two magnet films subjected to multipolar magnetization overlap each other in the magnetic pole direction, (A) shows the state of intersection, and (b) is a partially enlarged view of the intersection. BRIEF DESCRIPTION OF THE DRAWINGS It is a front schematic diagram which shows the case where many magnet film cards of this invention are piled up, and arrange | positions four rounds, (a) is a schematic diagram which hits a flat surface 18 and aligns a lower end part, (b) shows the state which arranged. It is a conceptual schematic diagram (front) which shows the perpendicular direction magnetic attraction force measuring apparatus of a magnet film and a soft iron plate. It is a conceptual diagram (front) which shows the tensile shear magnetic attraction force measuring apparatus of magnet films.

Hereinafter, the form for implementing this invention is demonstrated based on FIGS.
(1) FIG. 1 is a schematic cross-sectional view showing the basic structure of a magnet film A of the present invention. (A) shows that a magnetic layer 2 in which magnetic powder is oriented in a vertical magnetic field is formed on one side of a support 1 by coating, and then multipolar magnetization is applied to one side of a magnetic film in which a film 11 similar to the support is laminated. (B) shows another method of forming a magnetic layer 2 in which magnetic powder is oriented in a vertical magnetic field on one side of a support 1 and then bonding the magnetic surfaces together. It is a cross-sectional schematic diagram which shows magnet film A1 which gave multipolar magnetization to one side.

(2) FIG. 2 is a schematic sectional view showing a precursor of the magnet film A shown in FIG. (A) corresponds to (a) of FIG. 1 and shows a precursor B in which a magnetic layer 2 in which magnetic powder is oriented in a vertical magnetic field is formed on one side of a support 1 by coating, and (b) of FIG. Corresponding to (b), a precursor B1 in which a magnetic layer 2 in which magnetic powder is oriented in a vertical magnetic field is formed on one surface of the support 1 by a half of the magnetic layer of the target magnetic film by coating. Show.

  Examples of the support 1 include a synthetic paper having a printable layer on the surface (not shown of the printable layer, the same applies hereinafter), a plastic film containing an inorganic powder, water-resistant paper, and the like. Among them, the tensile elastic modulus is 3200 to 4200 MPa. (JIS K7127) is preferred. The printable layer means a printing ink receiving layer suitable for the purpose of use.

  Examples of synthetic paper include YUPO synthetic paper FEB, FGS, FPG, VJFP, VJFD, etc. (manufactured by Yupo Corporation), Toyojet GP, MW, MT, MP, etc. (manufactured by Toyobo Co., Ltd.), Peach Coat SPY, (Nisshinbo Co., Ltd.) Among them, Toyojet MW, MT (manufactured by Toyobo Co., Ltd.) and Peach Coat SEY (Nisshinbo Co., Ltd.), which are PET (polyethylene terephthalate) synthetic paper, are preferred.

  Examples of the plastic film containing inorganic powder include polyester films / Chrispar G2311, K1212, 2323, K2411 (Nisshinbo Co., Ltd.), semi-rigid vinyl chloride film 10P (Riken Technos), etc. Crystal (manufactured by Shinyodogawa Paper Co., Ltd.), Kaleka (manufactured by Mitsubishi Chemical Media Co., Ltd.), and the like.

  The thickness of the support having a printable layer on the surface is preferably 40 to 220 μm. If the thickness is 40 μm or less, the end of the magnetic film is not damaged or the wavy deformation due to partial magnetic adsorption is prevented, and the color hiding power of the formed magnetic layer is insufficient. If it is thicker than 220 μm, the magnetic air gap (distance between the magnet's magnetic attracting surface and the adherend (magnetic material) surface) will become a magnetic adhesion, and the decrease in magnetic attraction force cannot be ignored. .

  The ink receiving layer may be selected from a grade suitable for printing methods (offset printing, letterpress printing, ink jet printing, thermal transfer printing, etc.) for synthetic paper, and plastic films containing inorganic powders are known for printing methods. The ink receiving layer may be applied.

  The magnetic layer 2 in which the magnetic powder is oriented in the plane has a composition mainly composed of anisotropic ferrite hard magnetic material powder and organic polymer elastomer, and anisotropic ferrite hard magnetic material powder includes strontium ferrite and barium. M-type ferrites such as ferrite are suitable.

  The content of the magnetic material powder with respect to the total amount of the magnetic layer is preferably 50 to 65% by volume, and if it is less than 50% by volume, the magnetic attractive force obtained may be insufficient, and if it exceeds 65% by volume, the coating processability decreases. Therefore, it is not preferable.

  Examples of the organic polymer elastomer include an ethylene vinyl acetate copolymer elastomer, an ethylene ethyl acrylate elastomer, an ethylene propylene elastomer, a urethane elastomer, and the like, and a mixture thereof and a plastomer (plastic) as appropriate depending on desired physical properties. Can be used.

For the preparation of the coating liquid, a varnish obtained by dissolving the organic polymer elastomer in an organic solvent, or an emulsion and magnetic material powder which are stirred and mixed and then dispersed using a bead mill is used.
Next, after adjusting the viscosity to a viscosity suitable for the coater to be used (the one dissolved in the organic solvent is an organic solvent and the emulsion is diluted with water), a filtration treatment for removing foreign matters is performed.

  The thickness of the precursor magnetic layer shown in FIG. 2 is preferably 50 to 150 μm in (a), and if it is less than 50 μm, the performance may be insufficient, and if it exceeds 150 μm, in addition to excessive performance, avoid increasing the thickness. This is not preferable. In (b), 25 to 75 [mu] m is preferable, and if it is less than 25 [mu] m, the performance may be insufficient. If it exceeds 75 [mu] m, in addition to excessive performance, it is not preferable because the thickness is not increased.

  Further, the magnetic layer of the precursor can be smoothed and the density of the magnetic layer can be improved (improvement of magnetism) by applying pressure with a nip type press roll after coating and molding. And it is more effective to apply to the precursor than after pasting, and there is less possibility of causing flaws due to thickness variation and excessive pressurization of the nip roll.

This prevents the magnetic attraction force from being lowered due to the displacement of the magnetized magnetic powder due to the pressurization deformation at the time of laminating the magnetic layers (by applying the pressure treatment before applying the magnetization).
The pressure treatment conditions are preferably a temperature of 60 to 80 ° C., a hardness of the nip rubber roll: Shore A of 55 to 65 °, and a linear pressure of about 200 to 400 N / cm.

(3) FIG. 3 is a schematic side view showing an example of a coater MC provided with a vertical magnetic field orientation device MM for coating and forming a magnetic layer. The support 1 is supplied from the unwinder 7 to the comma coater head, The magnetic field is oriented by a vertical magnetic field orientation device MM installed at the entrance of the drying furnace 4. When it leaves the drying furnace, it is pressurized with the nip roll 5 and then cooled with the cooling roll 6, and the precursor B or B 1 is wound up by the winder 8.

  In addition to the above, the coating can be performed by a known method such as a blade coater, a bar coater, a comma coater, a gravure coater, a roll coater, or a reverse roll coater.

(4) FIG. 4 is a conceptual schematic diagram of the vertical magnetic field orientation device MM. By facing the permanent magnet 9, a magnetic flux in the M direction is obtained, and a guide roll 14 is provided so as to pass through this position. 1 shows that the magnetic powder in the magnetic layer (magnetic coating material) applied to the support 1 is oriented with the easy magnetization axis (crystal C-axis direction) of the magnetic powder aligned in the M direction. That is, the perpendicular magnetic field orientation magnetic flux direction M and the magnetization easy axis direction C are perpendicular to the product flow direction F. The strength of the magnetic field necessary for the magnetic field orientation may be about 1000 to 2500 Oe.

(5) FIG. 5 is a concept showing that one of the anisotropic ferrite particles 10 contained in the magnetic layer is oriented with the easy axis C oriented in the same direction by the magnetic flux M in the vertical direction of FIG. It is a schematic diagram.

(6) FIG. 6 is a schematic side view showing an example using a dry laminator. The film 1-1 similar to the support or the precursor B1 is unwound from the unwinder 7, and the adhesive is used with the gravure coater 11. This magnetic film (magnet) obtained by drying in the drying furnace 4 and then being bonded to the precursor B or B1 supplied from the unwinder 7 by the heating nip roll 5 and cooled by the cooling roll 6 It shows that the non-magnetized product of the film is wound by the winder 8.

  The adhesive used for the dry lamination is preferably an adhesive that can be reheated by reheating at the time of lamination after coating and drying, or an adhesive (contact type) that can be immediately bonded at the time of lamination. Examples of heat-reactive adhesives include water-based urethane resin adhesives such as Konishi Bond CU3 (manufactured by Konishi Bond), Hydran HW-311 (manufactured by DIC Graphics), WA-374 (manufactured by Dainichi Seika). Solvent type rubber-based chloroprene-based cemedine GF (made by Cemedine), resin-based polyester-based R820 (made by Cemedine), and polyester-based urethane Crisbon 4070 (made by DIC Graphics).

  For adhesives (contact type), emulsion type acrylic resin-based AQUATEX AP-25 (manufactured by Chuo Rika Kogyo Co., Ltd.), solvent type silyl group-containing special polymer Super X (manufactured by Cemedine) .

  The adhesive layer may be obtained by applying and drying an adhesive by a known method such as a blade coater, a bar coater, a comma coater, a gravure coater, a roll coater, and a reverse roll coater so as to be about 1 to 4 μm (dry).

  The conditions of the heated nip type press roll differ depending on the adhesive, but the approximate heating temperature: 70 to 90 ° C. (No heating is required when using an adhesive), the hardness of the nip rubber roll: Shore A 55 to 65 °, line Pressure: about 100 to 300 N / cm is desirable.

(7) FIG. 7 is a schematic side view showing an example using a thermal laminator, and the magnetic layers can be bonded together by thermocompression bonding without using an adhesive for bonding the precursors together.
The precursor B1 is heated by the heating roll 13 from the upper and lower unwinding machines 7, and then bonded by the nip roll 5 and then the cooling roll 6 is wound, and the magnetic film (unmagnetized product of the magnet film) is wound by the winder 8. Indicates.

  The organic polymer elastomer used for the magnetic layer in this case is preferably a varnish or emulsion composed of an organic solvent and a chlorosulfonated polyethylene elastomer, an ethylene vinyl acetate copolymer elastomer, an ethylene ethyl acrylate elastomer or the like having excellent thermocompression bonding properties. .

  The thermocompression bonding conditions of the heated nip type press roll depend on the heat sensitivity of the organic polymer elastomer that is the binder of the magnetic layer, but the heating temperature is 80 to 90 ° C., the hardness of the nip rubber roll is Shore A 55 to 65, ° Linear pressure: about 200 to 400 N / cm is desirable.

(8) FIG. 8 shows that the anisotropic ferrite powder 10 contained in the magnetic layer is oriented with the easy axis C in the same direction by the vertical magnetic flux M in FIG. It is a conceptual schematic diagram which shows the direction of the magnetic flux for magnetizing (magnetizing).

(9) FIG. 9 shows an example in which single-sided magnetization is performed using a known permanent magnet type magnetizing roll. Thus, it is shown that the external leakage magnetic flux MB1 from the N pole to the S pole is generated. Magnetization is performed by passing the magnetic film through about one third of the circumference of the magnetizing roll.

(10) FIG. 10 is a conceptual schematic diagram (perspective view) showing that the magnetizing rolls are opposed to obtain the magnetic flux MB in the vertical direction using two known permanent magnet type magnetizing rolls. Equivalent to 8 MB. Then, the double-sided magnetization can be performed by passing the magnetic film so as to be sandwiched between the two upper and lower magnetizing rolls.

  Magnetization can also be performed by a magnetizing method comprising a known high-voltage pulse current generator and a one-turn magnetizing yoke. However, if the magnetic film is thin and the distance between the poles is small, the permanent magnet type magnetizing roll method is preferred. Is preferred.

  For multipolar magnetization, it is preferable to apply multipolar magnetization of 0.5 to 3 mm between poles. However, it is difficult to produce a magnetizing yoke or a magnetizing roll if the distance between poles is 1 mm or less. This is not preferable because it deviates from the range between the poles suitable for the magnet (efficient magnetization).

(11) FIG. 11 is a top view showing a state in which the magnetic poles applied to the magnet film of the present invention are irregularly magnetized.

(12) FIG. 12 is a schematic cross-sectional view showing magnetization (magnetic poles are equally spaced) of a conventional magnet film, where n is the N pole of the non-magnetized surface, and s is the S pole of the non-magnetized surface. N indicates the N pole of the magnetized surface, and S indicates the S pole of the magnetized surface, but between each of the magnet poles (d1, d2, d3, d4, d5, d6, d7, d8, d9) is uniform.

(13) FIG. 13 shows that the conventional magnet films are non-magnetized and magnetized surfaces, and the center line of the N pole and the center line of the s pole, and the center line of the S pole and the center line of the n pole match. It shows the adsorbed state.
As described above, in the multipolar magnetization of the conventional magnet film, since the distance between the poles is uniform, the magnet films are in contact with each other between the non-magnetized surface and the magnetized surface or between the magnetized surface and the magnetized surface. In such a case, magnetic adsorption is performed between Sn and Ns or between SN and NS due to different polar attraction, which is inconvenient in some cases.

(14) In order to inhibit the phenomenon, if the distance between the respective poles is made non-uniform, the opposing NS position does not come on the center line of the pole, so that magnetic attraction can be inhibited.
FIG. 14 (a) shows that the magnetic films A2 and A2 of the present invention have a non-magnetized surface and a magnetized surface, and an N-pole center line and an s-pole center line, and an S-pole center line and an n-pole center line. It shows a state that does not match.
In this state, the adsorptive power is remarkably reduced, so there is no fear of inconvenience.
FIG. 14B shows a state in which the magnet films A2 and A2 are magnetized surfaces and the center line of the N pole and the center line of the S pole do not match the center line of the S pole and the center line of the N pole. It is shown.
Even in this state, the attractive force is remarkably lowered, so there is no fear of inconvenience.

Between the poles of the magnet film, the dimension between the poles suitable for the thickness is set as the gap between the reference poles, the dimension between the reference poles × (4 to 6) is taken as one unit, and the gap between the reference poles per unit is 0.8. There are 4 to 6 magnetic poles in the range between 0.9, 1.0, 1.1, and 1.2 poles, and the multipole magnetization is irregular in each unit in which the order is continuous. More preferably, assuming that the dimension of the reference gap × 5 is one unit, the gap between the reference poles per unit is 0.8, 0.9, 1.0, 1.1, 1.2 1 in each, a total of five, and multipolar magnetization that is irregular within each unit in which the order is continuous. For example, in the case of 2 mm between the reference electrodes, the unit size is 10 mm, and there is one each between 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, and 2.4 mm, order is disordered, a multi-pole magnetization is irregular order within each unit of a row. For example, when one unit is represented by “”, “1.6 mm, 2.0 mm, 2.4 mm, 1.8 mm, 2.2 mm” “2.0 mm, 2.4 mm, 1.8 mm, 2 .2 mm "..., the order of the magnetic poles in each unit becomes irregular .

When one unit is between the reference electrodes × 4, there are four reference electrodes between each of the reference electrodes × 0.8, 0.9, 1.1, and 1.2, for a total of four reference electrodes × 6. In the case of, there are a total of 6 between the reference poles × 0.8, 0.9, 1.1, 1.2 and one between the reference poles x 1.0 You can do it.
Also, if one unit is smaller than the size of the reference electrode x 4, the degree of freedom for making the gap between the electrodes irregular is reduced, and if one unit is larger than the size of the reference electrode x 6, the distance between the electrodes of the same size increases. It is not preferable because it causes a decrease in irregularity .
In addition, it is preferable that the dimension between the magnetic poles is a reference inter-electrode interval × (0.8 to 1.2) because it does not deviate from the range between the inter-electrode electrodes suitable for the thickness.

The irregular method between the magnetic poles can be implemented by specifying the distance between the poles in the form of a multi-pole magnetized roll using a conventionally known permanent magnet, so that a long (roll) material is continuously magnetized. There is an advantage that can be. Then, when cutting a magnetic card from a wide and long magnetized raw material, it is necessary to first cut into a strip shape in the longitudinal direction of the magnetic card in the horizontal direction of the original material, and then cut in the horizontal size of the magnetic card. . In this case, the magnetic pole pattern of the magnetic card manufactured from what was cut into each band shape by starting the discarding of the first end portion irregularly within a range of about 10 times the standard magnetic pole dimension. Almost coincides with the magnetic pole pattern of other cards (a combination that does not produce an effect of reducing the attractive force).

(15) FIG. 15 is a conceptual schematic cross-sectional view showing the partial adsorption of the wave generated when the front and back surfaces of the magnet films A4-1 provided with a support on the front surface (one surface) are overlapped. (Description of the opposite magnetic pole not directly involved in the magnetic adsorption of the two is omitted)
A flexible magnet film (a binder is made of an organic polymer elastomer) provided with a support only on the surface (one side) is sometimes corrugated by a magnetic attraction force with a different polarity that opposes the temperature and time. There is an inconvenience of deformation and partial magnetic adsorption.

(16) FIG. 16 is a conceptual schematic cross-sectional view showing a weak magnetic adsorption state that does not cause partial adsorption of waves when the front and back surfaces of the magnet films A2 provided with supports on both sides of the present invention are overlapped. . (Description of the opposite magnetic pole not directly involved in the magnetic adsorption of the two is omitted)
By having the support on both sides, it has moderate flexibility and maintains a weak magnetic adsorption state that does not cause wavy partial adsorption against the magnetic attractive force with the opposite polarities. The same applies to the case where the surfaces of the magnet films are stacked.

(17) FIG. 17 is a schematic top view showing that a conventional magnet film subjected to in-plane magnetic field orientation is cut with an inclination with respect to the magnetic field orientation direction.
Magnetization of an anisotropic magnet film with in-plane magnetic field orientation in the magnetic field orientation direction (manufacturing flow direction) makes the direction of the magnetic pole of multipolar magnetization perpendicular to the magnetic field orientation direction (manufacturing flow direction). It is an essential condition. Naturally, in order to magnetize with an inclination with respect to one side of the standard magnet film, one of the non-magnetized standard magnet film with respect to the polar direction of the magnetizing roll is used. Even if it is supplied to the magnetizer so that the sides are inclined, normal magnetization cannot be performed.

As a countermeasure against the inconvenience, it is obtained by using a magnet sheet that is magnetized in a direction perpendicular to the magnetic field orientation direction (manufacturing flow direction) in the direction of the magnetic poles of multipolar magnetization, and cutting by providing an inclination. It is shown that. This method is not economical because a portion (loss) that is not used at the time of cutting is generated.
The magnetic film according to the vertical magnetic field orientation of the present invention can be freely magnetized in the magnetic pole direction, so that it is not necessary to perform such cutting (economical).

FIG. 18 is a schematic diagram for explaining a reduction in the attractive force when a non-magnetized surface and a magnetized surface are overlapped using a magnetic card produced using a magnetic film that is tilted and magnetized. 18A shows a plan view, and FIG. 18B shows an enlarged view of the minimum unit.
As shown in these figures, magnetic poles s and n having an inclination angle E are formed on the non-magnetized surface of the magnetic card, and magnetic cards magnetized at different inclination angles F with respect to the surface are provided. When placed, they overlap at the intersection angle represented by G.
Incidentally, in the current drawing, the inclination angle E is 30 ° (non-magnetized surface), the inclination angle F is 60 ° (magnetized surface), and the intersection angle G is 30 °.

  Then, as shown in FIG. 18B, there are four magnetic adsorption states in this state by crossing the pair of magnetic poles of gradient magnetization, that is, the N pole, the S pole, the n pole, and the s pole. Blocks “V (N, n same polarity repulsion), W (S, s same polarity repulsion), Y (N, s different polarity suction), Z (S, n different polarity suction)” having the same shape and area are formed. Since two repelling blocks and two blocks attracting different poles are used, the magnetic attractive force is substantially offset, and the magnetic cards have a large number of relationships as shown in FIG. 18 (a). Similarly, the magnetic attractive force is substantially canceled (reduced magnetic attractive force).

  This effect can be achieved as long as the crossing angle G is not 0 or very small. Therefore, as long as the conditions are within the range, the inclination angle E and the inclination angle F can be implemented by other than the above numerical values. Needless to say. In addition, this phenomenon and the effect are similarly generated even when the magnetized surfaces are overlapped with each other.

Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited thereto.

(1) Preparation of precursor 1) Support: Polyester synthetic paper Krisper K2311 (manufactured by Toyobo Co., Ltd.) 38 μm thick, ink receiving layer NS600X (manufactured by Takamatsu Yushi Co., Ltd.) was applied using a comma coater, and a total thickness of 50 μm was synthesized. Use paper.

2) Formation of magnetic layer 2) -1 Blending of coating liquid Ethylene / vinyl acetate copolymer Product name: Evaflex EW-40LX (VA 41%) Mitsui / DuPont Polychemical Co., Ltd. [Elastomer]・ ・ ・ ・ ・ ・ 70 parts by weight Ethylene / vinyl acetate copolymer Product name: EVAFLEX V-5572ET (VA 33%), Mitsui, manufactured by DuPont Polychemical Co., Ltd. [Elastomer] Part by weight anisotropic strontium ferrite powder, magnetic field orientation type (OP-71), manufactured by DOWA FTEC Co., Ltd. [Hard magnetic material] ... ... 800 parts by weight methyl ethyl ketone [organic solvent] ... 240 parts by weight toluene [organic solvent] ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 73 Parts [loading 88.9 wt% of the magnetic material powder in the solid content (60.3% by volume)]

2) -2 Preparation of coating liquid According to the above formulation, an organic solvent and an elastomer were added to a stirrer (disper; shear type blade diameter 200 mm), stirred and dissolved, and then anisotropic strontium ferrite powder was added and mixed and stirred. The material is subjected to a dispersion treatment in a sand mill (beads: 1.25 mm, disk: flat type, peripheral speed 12 m / s).

2) -3 Coating of magnet layer Stirring and viscosity adjustment with a stirrer just before coating, vertical coating applied to a coating thickness of 90 μm (dry) using a comma coater on one side of the support and applied to the inlet of the drying furnace A vertical magnetic field orientation (FIG. 5) (strength of the orientation magnetic field: about 1300 Oe) is performed through a magnetic field orientation device (see FIG. 4), followed by drying and cooling in a drying furnace (50 to 100 ° C. × 10 minutes). Create a body.
(2) Laminate another support on the other side

Using a known dry laminator composed of a gravure coater head, a drying furnace, and a nip roll (heating roll and rubber roll), another support is laminated on the other surface under the following conditions. (Figure 3)
An adhesive (Hydran HW-311 / DIC Graphics) was applied to the back surface of the support, coating thickness: 1 to 3 μm (dry), thermal activation temperature: 80 to 90 ° C., hardness of rubber roll of nip roll: 60, Linear pressure: about 120 N / cm.

(3) Magnetization In a form using two known permanent magnet type magnetizing rolls (Y) (FIG. 10), a magnetic flux in the vertical direction is formed, and the direction of the magnetic pole of the magnetized magnet film is that of the magnet film. Irregularly magnetized based on a 2.0 mm pitch between poles of multipolar magnetization parallel to the flow direction, a double-sided magnetized magnet film having a support on both sides is obtained. That is, the permanent magnet type magnetizing roll which is conventionally known, with respect to the 2.0mm uniform thickness of the permanent magnet incorporated, magnetizing roll embodying the invention the thickness of the permanent magnet incorporated, 1 unit The dimension of 10 mm is 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm, and there is one gap between them, and the order is irregular within each unit. Magnetization is performed using a magnetizing roll incorporated in a certain manner.

The thickness of the magnetic layer of the precursor is 45 μm, and the same procedure as in Example 1 is performed except that the magnetic layers are bonded to each other using an adhesive.
(1) Lamination of magnetic layers Using a known dry laminator composed of a gravure coater head, a drying furnace, and a nip roll (heating roll and rubber roll), lamination is performed under the following conditions. (Figure 3)
Adhesive (Hydran HW-311 / manufactured by DIC Graphics) is applied to the magnetic layer surface of one precursor, coating thickness: 1 to 3 μm (dry), thermal activation temperature: 80 to 90 ° C., rubber roll of nip roll Hardness: 60, linear pressure: about 120 N / cm.

(2) Application example (creation of postcards)
Cut the postcard of length 480mm x width 930mm, and print the address face of the postcard on one side of the postcard of length 150mm x width 100mm on 27 sheets of width 9 rows x length 3 (postcard, postal code frame, stamp Printing a sticky frame) and printing a landscape image on the other side by ink jet printing, and cutting a postcard of 150 mm length × 100 mm width.

  Example 2 except that the base material is PET synthetic paper Krisper K2323 (Toyobo Co., Ltd.) with a thickness of 75 μm and an ink receiving layer NS600X (Takamatsu Yushi Co., Ltd.) is applied to make the total thickness 100 μm and the magnetic layer thickness 130 μm. To. (Hereafter, postcard creation examples will save labor, but each example can be created in the same way.)

The same procedure as in Example 2 was performed, except that the regular cut product was subjected to one side magnetization and gradient magnetization with equal intervals between the poles.
Inclined magnetization, a rubber roll is brought into contact with the lower part of a permanent magnet type magnetizing roll (FIG. 9), and a standard size cut product is measured with respect to the product flow direction of the permanent magnet type magnetizing roll. A vertical right side direction having an inclination angle of 30 ° and that having a tilt angle of 60 ° are created (the crossing angle at the time of measuring the overlapping magnetic attraction force is 30 °). In addition, one having an inclination angle of 0 ° is also prepared and used for measurement of magnetic attraction force obtained when the magnetic pole direction is changed to 0 °, 30 °, and 60 °.

The same as in Example 2, except that the poles are equally spaced (1 mm) and tilted magnetization is performed.
Inclined magnetization is the same as that of the first embodiment in the permanent magnet type magnetized roll (FIG. 10). A tilt angle of 60 ° and a tilt angle of 30 ° are created (the crossing angle when measuring the overlapping magnetic attraction force is 90 °).

The same operation as in Example 4 was performed except that the distance between the poles was irregular (standard gap between 2.0 mm).

Except that the support is made of PP synthetic paper SPUY115VSIP 100μm (made by Nisshinbo Co., Ltd.), the thickness of the magnetic layer is 130μm, irregular magnetization (standard spacing is 2.5mm), and the support is laminated on the magnetic layer. Same as Example 5.
Irregular magnetization has a unit size of 12.50 mm, and there are 2.0 mm, 2.25 mm, 2.5 mm, 2.75 mm, and 3.00 mm poles each in that order. Is magnetized using a magnetizing roll incorporated so as to be irregular within each continuous unit.

(Comparative Example 1)
In the same manner as in Example 1, a magnetic film in which a magnetic layer is formed on one side of a support and a support is not provided on the other side, and both sides are magnetized at equal intervals (2 mmP).

(Comparative Example 2)
In the same manner as in Example 1, a magnetic film in which a magnetic layer is formed on one side of a support and irregular magnetization is applied with a standard pole distance of 2.0 mm without providing a support on the other side.

(Comparative Example 3)
In the same manner as in Example 1, a magnetic layer was formed on one side of a support, and a support was not provided on the other side. .
The tilt magnetization is (tilt angles 30 and 60, intersection angle 30).

(Comparative Example 4)
In the same manner as in Example 1, a magnetic layer is formed on one side of a support, and a regular cut magnet with irregular gradient magnetization of 2.0 mm between standard poles without providing a support on the other side. the film. The tilt magnetization is (tilt angles 30 and 60, intersection angle 30).

(Comparative Example 5)
Example except that the base material is PET synthetic paper Krisper K2323 (Toyobo Co., Ltd.) 75 μm thick and the ink receiving layer NS600X (manufactured by Takamatsu Yushi Co., Ltd.) is applied to make the total thickness 100 μm, and the support is not provided on the other side. Magnetic film similar to 7.

Next, a performance test method and the like will be described.
1. Magnetic adsorption force measurement method (perpendicular magnetic adsorption force between magnet film and soft iron plate)
This measuring method is a standard method for measuring magnetic attraction force, and the performance of the magnetic attraction force of a single magnet film can be known.
A smooth 2 mm-thick soft iron plate having a square of about 60 mm on one side is attached to the upper surface of a smooth plastic plate using a double-sided tape. On the other hand, a square test sample with a side of 40 mm is stuck to a smooth plastic plate with a side of 50 mm provided with a hook at the center of the back using a double-sided tape. Then, the magnetic adsorption force (g / cm ² ) is calculated by measuring the force required to magnetically attract the two and pulling them apart in the vertical direction by hooking a spring balance on the back of the plastic plate. (See Figure 20)

2. Method for measuring lap tensile shear magnetic adsorption force A square test sample having a side of about 60 mm is attached to the upper surface of a smooth plastic plate using a double-sided tape. On the other hand, another test sample is attached to a square plastic plate having a hook at the center of the side and having a side of 50 mm using a double-sided tape. Then, the force required to magnetically attract the two and pull them apart in the horizontal direction is measured by hooking a spring balance to the hook on the side of the plastic plate to calculate the tensile shear magnetic attracting force (g / cm ² ). (See Figure 21)

3. Anti-waving deformation adsorbability test method Two anti-magnetic wave test cards (100 x 150 mm) are stacked, and the anti-waving deformation after standing for 7 days in a hot air circulation thermostat at 38-42 ° C. A four-step evaluation is performed by observing the presence or absence of adsorption. (See Figure 15)
◎: No undulations are observed. ○: Most undulations are not observed. △: Some undulations are observed.

4. Corner edge resistance test method At room temperature of 21-25 ° C, two magnetic film cards, which are test samples (100x150mm), are first stacked, and the cards are placed within a range of 360 °. The front and back sides are magnetically attracted at an angle (the magnetic pole directions overlap) at which the magnetic attraction force becomes maximum. In addition, in order to align the irregular cards in which a total of 10 cards were stacked in the same manner sequentially against the magnetic attractive force, the alignment was repeated three times by placing the four sides one by one against the flat surface of the table. Then, the four-level evaluation is performed by visually observing the deformation of the corner ends and the degree of scratches. (See Figure 19)
A: Deformation is not recognized. O: Deformation is hardly recognized. Δ: Deformation is slightly recognized. X: Deformation is recognized.

5. Workability test method After 50 magnetic film cards, which are test samples (100 × 150 mm), are scattered on the table, the work of aligning the four corners by 10 pieces is performed, and four-stage evaluation is performed.
◎: Excellent ○: Good △: Slightly inferior ×: Inferior

Next, test results will be described.
Each test was conducted for each example and comparative example, and the main configuration and test results were summarized in a table.
Table 1 summarizes the examples of the present invention, and Table 2 summarizes the comparative examples.

1. As can be seen from Example 4, it can be seen that the perpendicular magnetic field oriented magnet film of the present invention does not produce a difference in the magnetic attractive force obtained even when the magnetic pole direction is changed.

2. As can be seen from Example 1 and Comparative Example 1, Example 1 has a large effect of reducing the overlapping magnetic attractive force (shear tensile magnetic attractive force) because the support is on both sides and the distance between the electrodes is irregular . Workability is also excellent because of the excellent resistance to undulation deformation and the resistance to corner edge resistance. On the other hand, in Comparative Example 1, since the distance between the poles is equal, the overlapping magnetic attractive force is large and the workability is inferior.

3. As can be seen from Example 2 and Comparative Example 2, since Example 2 has a support on both sides and the distance between the electrodes is irregular , the effect of reducing the overlapping magnetic attractive force (shear tensile magnetic attractive force) is great. Workability is also excellent because of its excellent resistance to waving and corner deformation. On the other hand, in Comparative Example 2, since the support is only on one side, the wave-adsorbing adsorption property and the corner portion deformation property are inferior, and the workability is also inferior.
4 and Example 3 are excellent as in Example 2.

5. As can be seen from Example 4 and Comparative Example 3, in Example 4, the support is on both sides and the magnetic poles are crossed, so that the effect of reducing the lap magnetic attractive force (shear tensile magnetic attractive force) is great, and the wave resistance Workability is also excellent because of the excellent impact resistance and deformation at the corner edges. On the other hand, in Comparative Example 3, since the support is only on one side, the corner end deformation resistance is inferior, and the workability is also inferior because the work requires attention.
6 and Example 5 are also excellent as in Example 4.

7. As can be seen from Example 6 and Comparative Example 4, in Example 6, the support is provided on both sides, the poles are irregularly spaced, and the magnetic poles are crossed, so that the overlap magnetic attractive force (shear tensile magnetic attractive force) is increased. The reduction effect is great, and the workability is also excellent because of the excellent resistance to undulation deformation and corner end resistance. On the other hand , Comparative Example 4 is inferior in the corner portion deformation resistance because the support is a single side, and the workability is also inferior because the work requires attention. The same applies to Example 7 and Comparative Example 5.

8. From these results, it can be seen that the effect of having the support on both sides of the present invention is great. In addition, it can be seen that the magnetic attractive force obtained by the magnetic film oriented in the perpendicular magnetic field of the present invention does not change even if the magnetic pole direction (angle) is changed.

  A magnetic film having a support that can be printed on both sides and magnetized on one side or both sides, with reduced magnetic attraction when stacked, is expected to be applied to cards. Is done. It is particularly suitable for a post card.

A Magnet film of the present invention (omitted description of weak magnetic poles on the non-magnetized surface side)
A1 Magnet film of the present invention with different magnet layer formation A2 Magnet film of the present invention irregularly magnetized between magnetized magnetic poles A3 Oblique with respect to the magnetic pole direction of magnetization of a conventional in-plane oriented magnet film A4 magnet film cut into a square A4 Magnet film using conventional magnetizing method (equal spacing between poles)
A4-1 magnet film having a support the conventional single-sided (between magnetic poles is irregular)
B Precursor of the magnetic film A of the present invention B1 Precursor of the magnetic film A1 of the present invention MC Coating machine (coater) provided with a vertical magnetic field orientation device
MM Vertical magnetic orientation device CA1, CA2, CA3 Magnet film card of the present invention DL Dry laminator HL Thermal laminator C C-axis direction of magnetic powder crystal F Flow direction of product M Direction of magnetic field orientation magnetic flux MB Vertical direction from double-sided magnetic roll Magnetic flux MB1 Magnetic flux from a single-sided magnetized roll N N-pole of magnet n, N-pole generated on back (non-magnetized surface), N1, N-pole of other magnet S S-pole s of magnet, back (non-magnetized surface) S pole generated, S poles of other magnets d1, d2, d3, d4, d5, d6, d7, d8, d9 Between poles Y Permanent magnet type magnetized roll MA1 Vertical magnetic attraction between soft iron plate and magnet film Force measurement device MA2 Tensile shear magnetic adsorption force measurement device between magnet films 1 Support 1-1 Film similar to support 2 Magnetic layer with magnetic powder oriented in plane 3 Coater head (Commaco Over)
4 Drying oven 5 Nip roll 6 Cooling roll 7 Unwinder 8 B, B-1 (winder)
9 Permanent magnet 10 Magnetic powder (anisotropic ferrite crystal)
11 Coater head (gravure roll coater)
12 Magnetic film (Magnet film not magnetized)
13 Heating roll 14 Guide roll (Nonmagnetic)
15 Nd-Fe-B rare earth permanent magnet 16 Back yoke made of soft magnetic material (iron, etc.) 17 Shaft 18 Flat base (table)
19 Smooth plastic plate 20 Double-sided adhesive tape 21 Soft iron plate 22 Test sample 23 Smooth plastic plate provided with a hook in the center 24 Spring balance 25 Test sample 26 Other test samples 27 Smooth plastic provided with a hook in the center of the side Board

Claims (6)

Anisotropic ferrite-based hard magnetic material that is a solid component after drying on one side of a support with a magnetic paint mainly composed of anisotropic ferrite-based hard magnetic material powder and organic polymer elastomer-based varnish as a binder Coating with an anisotropic ferrite hard magnetic material powder with a filling amount of 50 to 65% by volume based on the total amount of powder, organic polymer elastomer and processing aid so that the thickness after drying is 40 to 250 μm. In addition, a non-magnetic guide roll is attached at a position approaching the lower pole (S pole) side between the opposite N pole face and S pole face of the upper and lower NS pole type vertical magnetic field orientation device installed before the drying furnace. The magnetic coating material is passed through a position where the support is close to the south pole, and is magnetically attracted to the south pole side so that a magnetic field of 1000 to 2500 Oe is stably applied. Magnetization capacity of magnetic material powder The magnetic pole orientation can be freely applied to one or both sides of a magnetic film whose axis is perpendicular to the support surface and a magnetic coating film with a flat surface after drying is formed. A method for producing a magnet film. With polyethylene terephthalate-based synthetic paper, on one side of the support having a thickness of 40 to 220 μm, the main component is an anisotropic ferrite-based hard magnetic material powder as a magnetic paint and an organic polymer elastomer-based varnish as a binder, Filling amount of anisotropic ferrite hard magnetic material powder 50 to 65% by volume with respect to the total amount of anisotropic ferrite hard magnetic material powder, organic polymer elastomer and processing aid, which is a solid part after drying Is applied so that the thickness after drying becomes 40 to 250 μm, and the lower pole between the N pole face and the S pole face of the upper and lower NS pole type vertical magnetic field orientation device installed before the drying furnace (S A non-magnetic guide roll is attached to a position approaching the pole) side, and the support coated with the magnetic coating is passed through the position approaching the south pole, and is magnetically attracted to the south pole side, and is stably 1000 to 2500 Oe. of Magnetic field orientation of the easy magnetization axis of the anisotropic ferrite type hard magnetic material powder support surface and perpendicular to the field is applied such, the magnetic film dried to the surface by forming a flat magnetic layer,
Laminating the same film as the support or laminating the magnetic coatings of the magnetic film together to give the wavy deformation adsorption resistance and the corner end deformation resistance as a magnetic film having a support on both sides,
Permanent magnet type magnetized roll or one-turn with irregular distance between poles with multi-pole magnetized magnetic pole direction on one or both sides parallel to the flow direction of the film coated with magnetic layer by coating machine When magnetizing the magnet film using the magnetized yoke, the distance between the poles of multipolar magnetization is irregularly magnetized so that the centers of the N and S poles of the magnet films do not overlap. Magnetic film with reduced magnetic attractive force between the magnet films of the film, evaluated by the following wave deformation deformation adsorption test and corner end deformation resistance test: corner end deformation resistance, wave resistance suitable for ◎ mark method for producing a magnet film characterized in that the magnet film having excellent droplet deformation adsorptive is obtained.

1. Wave-resistant deformation adsorption test method Existence of wave-shaped deformation adsorption after two magnet films, which are test samples (100 x 150 mm), are stacked and left in a hot air circulation thermostat at 38 to 42 ° C for 7 days. Observe the four-level evaluation. )
◎: No undulations are observed. ○: Almost no undulations are observed. Δ: Some undulations are observed. X: The undulations are observed. 2. Test method for resistance to deformation at corner edges. Two test pieces (100 x 150 mm) of magnetic film cards are stacked on top of each other, and the front and back sides are at an angle that maximizes the magnetic attractive force between the cards within the range of 360 ° in the magnetic pole direction (the magnetic pole directions overlap). Magnetically adsorb. In addition, in order to align the irregular cards in which a total of 10 cards were stacked in the same manner sequentially against the magnetic attractive force, the alignment was repeated three times by placing the four sides one by one against the flat surface of the table. Then, the four-level evaluation is performed by visually observing the deformation of the corner ends and the degree of scratches.
A: Deformation is not recognized. O: Deformation is hardly recognized. Δ: Deformation is slightly recognized. X: Deformation is recognized.   The amount of the anisotropic ferrite hard magnetic material powder in the magnetic coating film is 50 to 65% by volume, and the thickness of the magnetic coating film is 40 to 250 μm. The method for producing a magnet film according to any one of claims 1 to 2, wherein a multipolar magnetization of 0.5 mm is applied. The support of the magnet film having the support on both sides is a polyethylene terephthalate-based synthetic paper with a thickness of 40 to 60 μm, a thickness of the magnetic coating film of 80 to 100 μm, a magnetic adsorption force of 0.5 to 2.0 g / cm ² , and its own weight 480 g / The method for producing a magnetic film according to claim ² , wherein m ² or less.   The method for producing a magnetic film according to any one of claims 1 to 4, wherein the non-coated surface of the support is a printable or erasable surface. A magnet film card obtained by using the magnet film obtained by the method for producing a magnet film according to any one of claims 1 to 5.