TW200840468A - Sheet-like magnetic material and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet-like magnetic material whose printed part such as characters is protected from being rubbed, and which is inexpensive and thin. ; SOLUTION: The sheet-like magnetic material is provided with: a sheet-like translucent resin body 2 wherein a printed part 3 including at least one kind of characters, symbols and figures printed in ink is formed on its one surface; and a magnetic layer 5 that includes at least a soft magnetic metallic magnetic powder and a binder. The material is also formed on one surface of the translucent resin body 2. In addition, a clear painting layer 4 covering the printed part 3 is formed on one surface of the translucent resin body 2.

Description

200840468 IX. OBJECTS OF THE INVENTION: TECHNICAL FIELD The present invention relates to a sheet-like magnetic body that shields electromagnetic waves and a method thereof. ° [Prior Art]

A sheet-like magnetic body (electromagnetic interference suppressing body) disclosed in Japanese Laid-Open Patent Publication No. Hei No. Hei No. 1 1-68379 (JP1 1 - 068379) is known. The sheet-like magnetic body is an electromagnetic interference suppressing body composed of at least a soft magnetic powder and an organic binder, and a conductor is disposed on the surface of the sheet-shaped electromagnetic interference suppressing body, and the surface of the conductor is borrowed. At least one of a character, a symbol, a number, and a graphic is formed by printing. Therefore, by using this plate-like magnetic body, the degree of penetration of electromagnetic waves and the degree of bonding can be controlled by the combination of the electromagnetic interference suppressing body and the electric conductor. Further, the print W' of a character or the like becomes a sheet-like magnetic body having a display function. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei No. Hei 1- No. 1-68379 (pages 2 - 3 and 2). [Problems to be solved by the invention] The following problems have been caused. However, in the above-mentioned sheet-like magnetic body, at least one of characters, symbols, numerals, and figures is printed on the surface of the sheet-like magnetic body. Therefore, in this one sheet-like magnetic body, there is a problem that the printed characters and the like are faded and lost due to abrasion. In order to solve this problem, for example, the plate-like magnetic body 51 shown in Fig. 11 is a plate-shaped magnetic body 51, and has been formed into a plate-shaped magnetic interference suppressor.

The surface of the 2186-9351-PF 5 200840468 52 is provided with a conductive cymbal 53, in which at least the surface of the electric body 53 in the words, symbols, numerals, and graphics is printed to protect the printing portion 54, "the printing portion 54 is formed". After that, consider using a coating adhesive of 55 mesh i with a resin film (for example, polyethylene terephthalate J 55 and terephthalate); PET)) % / =? Since the coating of the adhesive 55 is additionally required at the time of manufacture The step of attaching the resin film to the resin film 5; 6#...4 is accompanied by an increase in steps

吏 “The problem of the cost increase should be solved. There is another problem that should be solved: in addition to the thickness of the resin film 56, the thickness of the layer in which the adhesive 55 is present is increased, and only this portion is increased. In view of the circumstances described above in the prior art, it is an object of the present invention to provide a sheet-like magnetic body and a method for producing the same, which can provide protection for abrasion of a printing portion such as a character, and is inexpensive. In order to achieve the above object, the sheet-like magnetic body of the present invention comprises: a translucent resin body having a shape, and a printing portion having a printing surface is formed on one surface thereof. At least one of the following group consisting of: a character, a symbol, and a pattern; and a magnetic layer formed on a surface of the one side of the light transmissive resin body, the magnetic layer having at least a soft magnetic metal Magnetic powder and bonding material. Further, in the sheet-like magnetic body of the present invention, the printing portion is composed of a plurality of layers of materials. The sheet-like magnetic body further includes a coating surface of the above-mentioned 2186-9351-PF 6 200840468 printing pad, and the coating layer is formed on the surface of the above-mentioned one side in a comprehensive manner. The sheet-like magnetic material is a pattern having a marking function for positioning as the printing portion. Further, the sheet-like magnetic body of the present invention further includes an adhesive layer, and the adhesive layer is formed on the above-mentioned On the side of the inner surface of the contact surface of the magnetic layer and the light-transmitting resin body, the sheet-like magnetic material of the present invention has a release sheet adhered to the surface of the adhesive layer. A method for producing a magnetic body, comprising: printing a pigment on a surface of one side of a light-transmitting resin body to form a printing portion, wherein the printing portion has at least one selected from the group consisting of: characters, 圮谠And a pattern formed on the surface of the one side of the light-transmitting resin body, wherein the magnetic layer has at least a soft magnetic metal powder and a bonding material. Further, regarding the present invention In the method of producing a sheet-like magnetic material, the printing portion is formed by gravure printing. [Effect of the Invention] In the sheet-like magnetic material of the present invention, the light-transmitting resin body is printed by printing. The surface of one side forms a printing portion, and a magnetic layer is formed on the surface of the one side. Therefore, by the formation of the sheet-like magnetic body, the printing portion is sandwiched between the translucent resin body and the magnetic layer. In the state between the two, the visibility of the printed portion of the light-transmitting resin body can be sufficiently ensured, and the wear of the printed portion can be reliably protected. Further, since the light-transmitting tree is formed, 2186-9351-PF 7 200840468 When the fat body, the printing portion, and the magnetic layer are formed, an adhesive is not used, and the manufacturing cost is reduced and the thickness is further reduced. Further, by the sheet-like magnetic body of the present invention, The printing portion is composed of a plurality of layers of materials, whereby one of the plurality of layers of the printing portion can be hidden and covered by the magnetic layer, so that the characters of the other layer printed in the printing portion can be further improved. Bright. Further, a colored plate-like magnetic body can be produced by using a multi-colored pigment on the layer on the side of the magnetic layer. Further, the sheet-like magnetic body of the present invention further includes a coating layer covering the printing portion, and the coating layer is formed on the surface of the above-mentioned side in a comprehensive manner. Thereby, the coating layer can absorb irregularities on the surface of the light-transmitting resin body which is generated by the formation of the printing portion. Therefore, with such a sheet-like magnetic body, the coating of the magnetic material paste (the surface of the coating layer) can be made flat, and the coating of the magnetic material paste can be greatly reduced; ) situation. As a result, with such a sheet-like magnetic body, since a magnetic layer having a uniform thickness can be formed, the electromagnetic interference effect can be further enhanced. Further, the plate-like magnetic body of the present invention is a printing portion having a marking function for positioning, and for example, in the cutting step, a mark for positioning is used as a reference point. The plate-shaped magnetic body can be correctly positioned; in addition, the plate-shaped magnetic body from the high-precision, rapid, long-length strip can be manufactured (cut) by automatic clamping by the cutting device. Plate-like magnetic body. Further, the sheet-like magnetic body of the present invention further comprises an adhesive layer which is formed on the inner surface of the contact surface of the magnetic layer and the light-transmitting resin. Thereby, it can be easily attached to suppress

2186-9351-PF 200840468 On the object of electromagnetic interference. Further, by the sheet-like magnetic body of the present invention, a release paper is adhered to the surface of the adhesive layer, whereby the sheet-like magnetic body can be superimposed and protected from the moss, and the storage property of the sheet-like magnetic material can be improved. . Further, by arranging a plurality of sheet-like magnetic bodies at a distance between the peeling and the detachment, it is possible to automate the attachment to the target product using an automated attaching machine, and it is also possible to achieve labor saving. In the method for producing a sheet-like magnetic body according to the present invention, a printing portion is formed on a surface of a side of the light-transmitting holding body, and a magnetic layer is formed on the surface of the one side. Therefore, by the method for producing a sheet-like magnetic material, it is possible to manufacture a sheet which can sufficiently ensure the visibility of the printing portion which is interposed between the translucent resin body and can provide a sure protection to the abrasion of the printing portion. Magnetic body. Further, since the adhesive is not used in forming the translucent resin body, the printing portion, and the magnetic layer, the material cost of the adhesive and the operation cost of the subsequent steps can be saved. In the manufacturing method of the sheet-like magnetic body of the present invention, the printing portion is formed by gravure printing, whereby the strip-like light transmittance can be adjusted for a long length. Since the entire portion of the resin body continuously forms the printing portion, the production capacity can be greatly improved. The above and other objects, features, and advantages of the present invention will become more apparent from the following description.

2186-9351-PF 9 200840468 Hereinafter, a preferred embodiment of a method for producing a sheet-like magnetic body and a sheet-like magnetic body according to the present invention will be described with reference to additional drawings. The following is a description of a rectangular plate-shaped magnetic body and a long-strip-shaped strip-shaped magnetic body produced by manufacturing the rectangular plate-shaped magnetic body, wherein the rectangular plate is described below. The sheet magnetic body suppresses, for example, interference of electromagnetic waves entering other internal lines other than the antenna portion in the mobile phone, and the antenna portion receives electromagnetic waves from an external reader. First, the configuration of the rectangular plate-like magnetic body 1 will be described with reference to the drawings. The sheet-like magnetic body 1 shown in FIGS. 1 and 2 is a sheet-like magnetic body that shields electromagnetic waves. As shown in FIG. 2, the configuration includes a translucent resin body 2, a printing unit 3, and a transparent coating layer ( In the case of the present invention, the coating layer, the magnetic layer 5, the adhesive layer 6, and the release paper 7 are used. In this case, the translucent resin body 2 is exemplified as having translucency and the thickness specification is, for example, 丨〇# The PET film having a range of m or more and 100/m or less is formed into a rectangular shape of 2·8 cm×3·6 cm in accordance with the size specification of the mobile phone. The structure of the printing unit 3 is printed on the translucent resin body 2. At least one of a character (including a numeral), a symbol, and a pattern formed by the pigment on the surface of one side. An example of the configuration of the printing unit 3 is as shown in Fig. 1 as "ABCDEF VWXYZ" formed of a pigment. The letter 3b. In this case, a general solvent-based or water-based pigment can be used as the pigment. Further, the printing portion 3 can be formed by gravure printing, letterpress printing, lithographic printing, or stencil printing. Silk printing), etc. , 2186-9351-PF 10 200840468 In the sheet-like magnetic body 1 _, in order to improve the visibility of the printing portion 3 by printing 4 3 π across the translucent resin body 2 (four), it is preferable to clearly distinguish the transparent coating. The pigment of the color of the layer 4, the magnetic layer 5, etc. The transparent coating layer 4 is formed in the whole of the translucent resin body 2 which has formed the printing part 3 so that it may cover the printing part 3 comprehensively. The surface of the side. In this case, a clear coating for forming the transparent coating layer 4 is preferably the same type of coating as the printing portion 3. Further, the transparent coating may be a colorless paint or a colored one. In the case of using a colored coating, it is preferable to use a color which can sharpen the color of the pigment used to form the printing crucible 3. Further, an example of the conditions for forming the transparent coating layer 4 is larger than the thickness of the printing portion 3 and the surface thereof. An example of the magnetic layer 5 is a composite magnetic material paste (hereinafter referred to as a composite magnetic material taste) applied to one surface of the light-transmitting resin body 2 and dried. Composite magnetic In the above-mentioned composite magnetic material, the soft magnetic metal magnetic powder is placed in a bonding material mainly composed of a resin or the like, and mixed and stirred. In this case, ferrite iron or the like may be used. A soft magnetic metal powder is used as the soft magnetic metal powder, and a thermoplastic resin, a thermosetting resin, an ultraviolet curable resin, or an electron linear resin can be used. Or a mixture of the above as the above-mentioned bonding material. Specifically, the above resin is a P〇lyamide resin, a polyetherketone resin, a vinyl chloride resin, and a polyester (p〇lyester). ) resin, epoxy resin (acryiic resin), urethane tree 2186-9351-PF 11 200840468 grease (a small 璐 璐 (c亀se) resin, acetic acid vinegar vinyl Acetate) #^! . ^ ^ ^ S| ^ (polycarbonate) f t' In addition to the above polymers, monomers and oligomers can also be used. In addition, the filling amount of the soft magnetic metal magnetic powder is not particularly limited, but it is preferably 7 (% by weight or more) in consideration of the electromagnetic interference suppressing effect, and the sputum body 1 for ensuring the sheet-like magnetic body 彳The necessary softness is preferably 95% or less. Further, an example of the formation conditions of the magnetic layer 5 is a morning sound of about 4 〇 #m or more and 100/zm or less. Gan #田,

Further, the magnetic layer 5 exhibits a high degree of electromagnetic interference suppression effect. An example of the formation conditions of the adhesive layer 6 is a double-sided tape (manufactured by Teraoka Manufacturing Co., Ltd.: I 707) attached to the surface of the magnetic layer 5. In this case, regarding the thickness of the adhesive layer 6, it is preferable to be thinner in the range of ensuring the bonding strength in order to suppress the thickness of the sheet-like magnetic (four) i. Instead, the adhesive layer 6' may be formed by a (iv) adhesive instead of the double-sided tape. The release paper 7 may be composed of a paper or PET film attached to the surface of the adhesive layer 6. Next, a method of manufacturing the sheet-like magnetic body i will be described with reference to the drawings. f First, as shown in Fig. 7, the long-strip-shaped translucent resin body 2 wound on the film feeding roller (r〇(1)" is pulled out, as shown in the same figure, not shown in the figure. In the layout of the gravure printing machine, the pigment is transferred to the surface on the side of the translucent resin body 2 to form the printing portion 3 as shown in Figs. 3 and 7 (printing portion forming step). The configuration of the printing unit 3 is a positioning mark 3a for the cutting step to be described later and the above-described character 3b displayed on the sheet-like magnetic body 1. Specifically, the same figure 2186 -9351-PF 12 200840468 No, the configuration of the mark 3a is one along the longitudinal direction of the translucent resin body 2 (the pull-out direction) on the side in the width direction of the translucent resin body 2 The pattern printed at a predetermined interval (an example of which is a rectangle). On the other hand, the character 3b is printed on each of a plurality of square areas B partitioned in the square area A specified by each positioning mark 3a. In this case, in order to be able to read the text normally when the light transmissive resin body 2 is seen, the mirror surface is used. In the method, the character 3b is printed on the surface of the light-transmitting resin body 2. Next, as shown in Fig. 4, the transparent paint is applied from the transparent paint application device of the figure (4) disposed on the downstream side of the gravure printing machine. The entire surface of the translucent resin body 2 on which the printing crucible 3 has been formed is formed, and a transparent coating layer covering the printing layer is formed on the surface of the translucent resin body 2 (transparent coating layer forming step) In this case, the condition of the transparent coating layer 4 (four) is that the thickness exceeds the thickness of the printing portion 3, and the surface thereof is substantially flat. Next, the pattern disposed on the downstream side of the clear coating device is not The magnetic (four) coating device is applied to apply the magnetic material paste prepared under the conditions described above to the entire surface of the transparent coating 4, and as shown in FIG. 5, in the transparent resin body 2 The magnetic layer is formed on the surface side of the side (in the case of the magnetic layer forming step, the unevenness on the surface of the translucent resin body 2 due to the formation of the printing portion 3 is absorbed by the transparent coating layer*) Reduce uneven coating of magnetic material paste (spot Thus' are formed in a thickness of substantially hook magnetic ㈣5 Next, a magnetic material disposed downstream of the coating apparatus of FIG formula (iv) drying means not drawn, the formed magnetic layer 5 dried (drying step).

2186-9351-PF 13 200840468 Next, 'double-sided tape (manufactured by Teraoka Manufacturing Co., Ltd.: Ν〇·7〇7) which has been attached to the surface of the release paper 7 in advance, is pulled out from the double-sided tape supply roller, and the other surface is removed. It is attached to the surface side of the side of the transparent resin body 2 on which the magnetic layer 5 has been formed (that is, the surface of the magnetic layer 5), and the double-sided tape and the peeling j 7 are integrated with the light-transmitting resin body 2 and the like. (Adhesive layer forming step). Thereby, as shown in Fig. 6, the adhesive layer 6 is formed on the surface of the magnetic layer 5 by a double-sided tape, and a release paper 7 is formed on the surface of the adhesive layer 6, and a long tape is formed. A sheet-like magnetic body 21 (a sheet-like magnetic body having a long strip shape) in which the magnetic layer 5 is formed on the light-transmitting resin body 2. In this case, a method of integrating the double-sided tape to which the release paper 7 has been attached and the light-transmitting resin body 2 on which the magnetic layer 5 or the like has been formed may be employed, for example, a pair of guides may be provided on the downstream side of the drying device. Roller (pinch r〇11), and a double-sided tape to which the release paper 7 has been attached, a translucent resin body 2 on which the magnetic layer 5 or the like has been formed, and the like are provided between the pair of guide rollers. method. Finally, the cutting device is based on the positioning mark 3a capable of recognizing φ via the translucent resin body 2, and automatically positions the plate-like magnetic body 21, and cuts each square region from the plate-like magnetic body 21 (cutting step) ). As a result, a rectangular plate-shaped magnetic body i as shown in Figs. 1 and 2 is produced by the positions of the cut rectangular regions B of the sheet-like magnetic body 21. In this case, in the sheet-like magnetic body, 21, the printing portion 3 is formed on the surface of one side of the translucent resin body 2 by printing, and the magnetic layer 5 is formed on the surface of this side. . Therefore, the plate-like magnetic bodies 1 and 21 can be sufficiently sandwiched between the translucent resin body 2 and the magnetic layer 5, whereby the translucent resin body can be sufficiently ensured. 2 2186-9351-PF 14 The degree of recognition of the printing unit 3 of 200840468 can provide a sure protection to the wear of the printing unit 3 and the like. Further, since the adhesive is not used at the time of forming the light-transmitting resin body 2, the printing portion 3, and the magnetic layer 5, the manufacturing cost can be made thinner and the thickness can be further reduced. By the method of manufacturing the sheet-like magnetic bodies 1 and 21, the degree of visibility of the printing unit 3 with the translucent resin body 2 interposed therebetween can be sufficiently ensured, and the wear of the printing unit 3 can be ensured. Protected sheet-like magnetic body _ 1, 21. Further, since the adhesive is not used in forming the translucent resin body 2, the printing portion 3, and the opening of the magnetic twin layer 5, the material cost of the adhesive and the operation cost of the subsequent steps can be saved. The result is that the manufacturing cost can be sufficiently reduced. Further, the above printing is formed by gravure printing. In addition, the printing unit 3 can be continuously formed for the entire strip-shaped translucent resin body 2 having a long length, so that the production ability can be greatly improved. Further, the sheet-like magnetic bodies 1 and 21 of the present invention further include a transparent coating layer 4 covering the printing portion 3 on the surface of one side of the φ translucent resin body 2. Thereby, the unevenness on the surface of the light-transmitting resin body 2 due to the formation of the printing unit 3 can be absorbed by the transparent coating. Therefore, by the plate-like magnetic body ϊ, 21, since the magnetic material paste = the coated surface (the surface of the transparent coating layer 4) can be flattened, the coating of the magnetic material paste can be greatly reduced. The situation of uneven cloth (spots). As a result, by the one sheet-like magnetic body 1, 21, since the magnetic layer 5 having a uniform thickness can be formed, the electromagnetic interference effect can be further enhanced. In addition, the sheet-like magnetic body 21 of the present invention is formed by

2186-9351-PF 15 200840468 The position 3a is used as the printing unit 3, and in the cutting step, the position of the jiangdou is marked as a reference point, and π 1 π α is used to make the sheet-like magnetic body. 21 correct position, in addition, you can also use the cutting device to automatically locate, but can

Manufacturing (cutting) a sheet-like magnetic body from a high-precision, signal, φ ^ e TU magnetic body 21]. In the sheet shape, the sheet-like magnetic body of the present invention can be easily formed by forming the adhesive eyebrow 6 on the inner side of the inner surface of the contact surface of the magnetic layer 5 and the light-transmitting resin body 2. Attached to the surface of the sheet-like magnetic body of the present invention, a release paper 7 is attached thereto, whereby the sheet-like magnetic body can be attached! By keeping it in a safe place, the storage property of the sheet-like magnetic body can be improved. Further, the present invention is not limited to the above configuration. For example, as in the sheet-like magnetic body 1A shown in Fig. 8, a printing unit 3 of a plurality of layers (in the same figure, two layers of the character 3b and the base layer 3c) may be formed. The same components as those of the plate-like magnetic body 1 are denoted by the same reference numerals, and the repeated description thereof will be omitted. When the sheet-like magnetic body u is produced, the character 3b is printed on the surface of one side of the light-transmitting resin body 2, and the pigment having a color different from the character 3b is printed on the surface of the character 3b so as to cover the character 3b. The entire resin body 2 is formed, whereby the base layer 3C is formed. Thereafter, a transparent coating layer 4 is formed. The plate-like magnetic body ία, the printing portion 3 is composed of a plurality of layers of materials, whereby the base layer 3c of one of the plurality of layers of the printed portion can hide and cover the magnetic layer 5, thus enabling printing on another layer. The text 31) is more vivid. Further, by using a multicolor tantalum pigment on the base layer 3c on the side of the magnetic layer 5, a colored sheet-like magnetic body 1A can be produced. 2186-9351-PF 16 200840468 In addition, the sheet-like magnetic bodies j, 1A, and 21 described above have a light-transmitting resin body 2, a printing portion 3, a transparent coating layer 4, a magnetic layer 5, and an adhesive layer 6, Although the release paper 7 is used, the plate-like magnetic body of the present invention may have a configuration in which the release paper 7 is omitted, and a configuration in which the subsequent 6 is omitted may be employed. Further, in the manufacturing process of the mobile phone, when the plate-like magnetic bodies 1, 1A are attached to the mobile phone to suppress electromagnetic waves, the release paper 7 is peeled off and attached. In order to improve the workability of the attaching work, the rider preferably uses the sheet-like magnetic body 如j as shown in FIG. 9 and the configuration of the release paper 7 is omitted from the sheet-like magnetic body 1. The sheet-like magnetic body 1B (or the sheet-like magnetic body 1C in which the structure of the release paper 7 is omitted from the sheet-like magnetic material 丨a) is arranged side by side in the longitudinal direction and the lateral direction on the surface of the j-sheet release paper 7. There is an established interval between them. By the use of the sheet-like magnetic body 1D, since the sheet-like magnetic bodies iB (lc) can be peeled off one by one from the release paper 7 and attached, the efficiency of the attachment work can be greatly improved. Further, in the case of using the automatic attaching machine, it is preferable to use the sheet-like magnetic body 1E as shown in Fig. 10, which is formed in a belt shape and formed with a guide hole at a predetermined pitch (pi) On the surface of the release paper 7 of the lot hole 7a, a sheet-like magnetic body IB (1C) is arranged in parallel at a predetermined interval (a predetermined pitch) along the longitudinal direction of the release paper 7. By the use of the one sheet-like magnetic body 1E, it is possible to carry out the attaching work to be attached to the target product by an automatic attaching machine using an automatic attaching machine, and the technical effect of labor saving can be achieved. In addition, the foregoing describes the various plate-like magnetics 2186-9351-PF 17 200840468 9 , 1B, 1C, 1D, 1E, 2 with the transparent coating layer 4 but even on the surface of the light-transmitting tree 2 The shape of the unevenness caused by the printing unit 3 of the printing unit 3: It is possible to apply the magnetically poor material in a situation where the coating unevenness (spot) is small, or to allow uneven coating (spotting) When the transparent coating layer 4 is formed, the formation of the transparent coating layer 4 can be omitted. Further, the text has been described with respect to a printed character and a figure (positioning mark 3a) = an example of a printing unit, but the present invention is not limited thereto. of course,

It is also possible to print all printables such as marks as a printing unit. Although the present invention has been disclosed in the above preferred embodiments, the present invention is not intended to limit the invention, and it is possible to make a few changes without departing from the spirit and scope of the invention. And the scope of the invention is therefore defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view showing the sheet-like magnetic bodies 1, 1A as seen from the side of the translucent resin body 2. Fig. 2 is a cross-sectional view along line of the sheet-like magnetic body 1 shown in Fig. 1. Fig. 3 is a cross-sectional view showing the purpose of explaining the manufacturing steps of the sheet-like magnetic body 1, and showing a cross-sectional view of the zero-going point at which the printing portion forming step is completed. Fig. 4 is a cross-sectional view showing the purpose of explaining the manufacturing steps of the sheet-like magnetic body 1, and showing a cross-sectional view at the time when the step of forming the transparent coating layer is completed. 2186-9351-PF 18 200840468 Figure 5 is a cross-sectional view of the cross-section. The figure is shown to show the time when the magnetic layer forming step of the sheet-like magnetic body 1 is completed.

The figure is a cross-sectional view for explaining the structure of the sheet-like magnetic body 21, and the printing portion 3 has been formed in a state in which the light-transmissive portion 7 is a slant-view resin body 2.

Figure 8 is a cross-sectional view of the first. The sheet-like magnetic body 1A shown in the figure is a plan view along the line X-X line = 9 and shows the configuration of the sheet-like magnetic body 1 ρ. Fig. 10 is a plan view showing the configuration of the sheet-like magnetic body 1E. Fig. 11 is a cross-sectional view for explaining the configuration of a conventional plate-like magnetic body 51. [Description of main component symbols] 1A to plate-like magnetic body lc to plate-like magnetic body 1E to plate-like magnetic body 1 to plate-like magnetic body 1B to plate-like magnetic body 1D to plate-like magnetic body 2 to Translucent resin body 3 to printing portion 3b to character 4 to transparent coating layer 6 to adhesive layer 7a to guide hole 21 to sheet-like magnetic body 3a to positioning mark 3c to base layer 5 to magnetic layer 7 to release paper 11~film delivery roller 51~plate-like magnetic body

2186-9351-PF 19 200840468 52~electromagnetic interference suppressor 54 to printing portion 5 6 to resin film B to square area 53 to conductor 5 5 to adhesive A to square area

2186-9351-PF 20

Claims (1)

200840468 ' X. Patent application scope: 1 . A sheet-like magnetic body comprising a sheet-like translucent resin body having a printing portion formed on one surface thereof, the printing portion having a selected portion selected from the following At least one of the group consisting of: a character, a mark, and a pattern; and a magnetic layer formed on a surface of the one side of the light transmissive resin body, the magnetic layer having at least a soft magnetic metal magnetic powder and a combination material. 2. The sheet-like magnetic body according to claim 1, wherein the printing portion is composed of a plurality of layers of material. 3. The sheet-like magnetic body according to claim 1, further comprising a coating layer covering the printing portion, the coating layer being approximately uniformly formed on the side of the 'side. 4. The sheet-like magnetic body according to claim 1, wherein the printing portion is a pattern having a marking function for positioning. 5. The sheet-like magnetic body according to claim 1, further comprising an adhesive layer which is formed on the inner side of the contact surface of the magnetic layer and the translucent resin body . 6. The sheet-like magnetic body according to claim 5, wherein a surface of the adhesive layer is adhered to a release paper. 7. A method for producing a sheet-like magnetic material, comprising: printing a pigment on a surface of one side of a light-transmitting resin body to form a printing portion having at least one selected from the group consisting of: A type: a character, a mark, and a pattern; and a magnetic layer formed on a surface of the one side of the light transmissive resin body, the 2186-9351-PF 21 200840468 magnetic layer having at least a soft magnetic metal magnetic powder and a bonding material. 8. The method of producing a sheet-like magnetic body according to claim 7, wherein the printing portion is formed by gravure printing. 2186-9351-PF 22