JP2021188384A - Magnetic wall material sheet - Google Patents

Abstract

To provide a magnetic wall material sheet satisfying requirements of scratch resistance, erasability, low gloss in addition to fire resistance.SOLUTION: A magnetic wall material sheet 10 consists of a laminate body having a multipole magnetized magnet sheet 20, a transparent surface coat layer 40 having hardening function and matting function, and a decorative layer 32 provided between the magnet sheet 20 and the surface coat layer 40. The magnetic wall material sheet satisfies the evaluation standard of predetermined heat release test relating to fireproof performance and gas toxicity test, and a surface of the surface coat layer 40, which is a wall surface 11, has pencil hardness of 4H or higher.SELECTED DRAWING: Figure 1

Description

The present invention relates to a magnetic wall material sheet. More specifically, the present invention relates to a magnetic wall material sheet which has scratch resistance, erasability and low gloss at the same time in addition to fire resistance and is suitable for application to the interior wall of a building.

In recent years, indoor magnetic walls that can attract and hold articles such as display pieces or shelves equipped with ferromagnets on the wall surface by magnetic force have become popular. Since such a magnetic wall is an indoor wall, it is required to have excellent fire resistance that does not spread damage in the event of a fire. FIGS. 2 and 6 of Patent Document 1 below disclose a fireproof magnetic wall material in which a surface material is laminated.

Japanese Unexamined Patent Publication No. 2005-290707

By the way, a magnetic wall for indoor use is required to have some conditions on the wall surface in addition to fire resistance. For example, it has scratch resistance that is not easily scratched, erasability that can easily remove dirt, and low gloss that gives a feeling of openness and calmness to the room, but it was difficult to meet these requirements at the same time.

For example, if the surface hardness is increased in order to improve the scratch resistance, the reflectance is increased and the low gloss property is impaired. That is, discomfort due to the reflection of light and deterioration of design due to glare or the like occur. Therefore, in order to suppress the reflection of light, it is conceivable to emboss the wall surface, but when embossing is applied, there is a problem that dirt tends to remain in the fine recesses on the surface and the erasability is inferior. come.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a magnetic wall material sheet having the requirements of scratch resistance, erasability and low gloss in addition to fire resistance. ..

The present invention takes the following measures to solve the above problems.
The reference numerals in parentheses attached to each of the constituent means in this column (the column of "means for solving the problem") are for reference to show the correspondence with the specific means described in the embodiment described later. The present invention is not limited to this.

One aspect of the present invention is a multi-pole magnetizing type magnet sheet (20), a transparent surface coat layer (40) having a hardening function and a matting function, and a magnet sheet (20) and a surface coat layer ( A magnetic wall material sheet (10) made of a laminated body provided with a decorative layer (32) provided between the 40) and the wall surface (11) while satisfying the evaluation criteria of the following test regarding fire resistance performance. The surface of the surface coat layer (40) is characterized by having a pencil hardness of 4H or more.
[Fever test]
In the heat generation test by a cone calorimeter tester that complies with ISO5660-1 and complies with the fireproof test method and performance evaluation standard based on Article 2-9 of the Building Standards Act and Article 108-2 of the Construction Ordinance of the Building Standards Act.
[1] The total calorific value for 20 minutes after the start of heating is 8 MJ / m ² or less.
[2] For 20 minutes after the start of heating, the maximum heat generation rate continued for 10 seconds or more and did not exceed ^{200 KW / m 2.}
[3] Have nonflammability that satisfies the condition that there are no cracks or holes harmful to fire protection for 20 minutes after the start of heating.
[Gas hazard test]
In the gas hazard test according to the gas hazard test method according to the Ministry of Construction Notification No. 1231 on August 25, 1976, the average behavioral stoppage time value of the mice was 6.8 minutes or more.

According to this aspect, the magnetic wall material sheet (10) includes a multi-pole magnetizing type magnet sheet (20), a transparent surface coat layer (40) having a hardening function and a matting function, and a magnet sheet (20). ) And the decorative layer (32) provided between the surface coat layer (40), which satisfies the evaluation criteria of the above test regarding desirable fire resistance for the interior wall. Therefore, it is suitable for application to the interior wall of a building.
Further, the surface coat layer (40) has a hardening function, and the surface of the surface coat layer (40) to be the wall surface (11) has a pencil hardness of 4H or more, so that scratch resistance and erasability can be improved. Further, since the surface coat layer (40) is transparent and has a matting function, the low glossiness of the decorative layer (32) that can be seen through the transparent layer is ensured, and the wall surface has a matte and calm tone. Can be done.

In another aspect of the present invention, a wall material layer (30) having a decorative layer (32) on one side is provided, and the wall material layer (30) is placed between the magnet sheet (20) and the surface coat layer (40). The decorative layer (32) is provided so as to face the surface coat layer (40).

According to this aspect, since the existing wall material layer (30) having the decorative layer (32) on one side can be adopted, the manufacturing cost can be suppressed.

In another aspect of the present invention, the surface coat layer (40) is a laminate of a translucent base film (41) and a translucent hard mat layer (42), and is a hard mat. The layer (42) is configured to contain a large number of fine particles (422) for light scattering in a transparent resin material (421).

According to this aspect, since a large number of fine particles (422) for light scattering cause diffuse reflection on the surface thereof and cause a matting function (matting function), the flatness on the wall surface (11) can be improved. It can improve the erasing performance.

In another aspect of the present invention, the pencil hardness of the surface of the surface coat layer (40) on the non-opposite surface side with the magnet sheet (20) is less than 4H.

According to this aspect, even if the surface coat layer (40) has a low pencil hardness by itself, the hardness of the uppermost wall surface (11) can be increased by laminating it on the magnet sheet (20). The scratch resistance of the wall surface (11) is ensured.

According to the present invention, there is provided a magnetic wall material sheet having the requirements of scratch resistance, erasability and low gloss in addition to fire resistance.

It is sectional drawing of the magnetic wall material sheet which concerns on this invention. It is a partially disassembled sectional view of the magnetic wall material sheet which concerns on this invention. It is sectional drawing which shows the coated film in more detail. It is a flow chart of the manufacturing procedure of the magnetic wall material sheet by a dry laminator. It is a figure which shows the laminating process in the 1st step of the manufacturing procedure of a magnetic wall material sheet. It is a figure which shows the laminating process in the 2nd step of the manufacturing procedure of a magnetic wall material sheet. It is a figure which shows the specific manufacturing procedure of the magnetic wall material sheet by a dry laminator. It is a perspective view of the magnetic wall provided with the magnetic wall material sheet which concerns on this invention. It is a partially disassembled perspective view of a magnetic wall.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 is a cross-sectional view of the magnetic wall material sheet 10 according to the present invention, FIG. 2 is a partially disassembled cross-sectional view of the magnetic wall material sheet 10 according to the present invention, and FIG. 3 is a cross-sectional view showing the coated film 40 in more detail. In FIGS. 1 and 2 and each figure described later, each component of the magnetic wall material sheet 10 is shown in a short shape in the horizontal direction for convenience of illustration, but is actually a long one.

The magnetic wall material sheet 10 is a wall sheet that is made removable by magnetic force with respect to a soft magnetic board 70 (see FIGS. 8 and 9 described later) provided with a soft magnetic layer such as steel foil, and is a wall sheet of FIGS. 1 and 2. As shown in the above, the magnet sheet 20, the wall material film 30, and the coat film 40 are laminated in this order via a urethane-based transparent adhesive G, respectively.

The magnet sheet 20 is a flexible sheet-like magnet body having a thickness of 80 μm to 400 μm, and the front and back surfaces thereof are alternately magnetized with N poles and S poles in a striped pattern, and are attached at a constant pitch. It is a double-sided multi-pole magnetizing type with a magnetic line. The thickness is set in the above range in order to secure fire resistance and magnetic holding power. That is, if it exceeds 400 μm, it becomes difficult to secure fire resistance, and if it is less than 80 μm, sufficient magnetic holding power cannot be expected. Further, the reason why the double-sided multi-pole magnetizing type is adopted is that both the front and back surfaces require a suitable magnetic attraction force. That is, one surface of the magnet sheet 20 faces the indoor space side, and a display piece or an article such as a shelf on which a ferromagnet (which may or may not have the property of a magnet) is attached is placed. This is because it functions as a magnetically attached surface for attracting and holding by magnetic force, and the other surface functions as a magnetically attached surface to the soft magnetic layer 72 in the soft magnetic board 70 described later.

Such a flexible sheet-shaped magnet body is made of a hard magnetic material (for example, a ferrite magnet material such as barium ferrite or strontium ferrite or a rare earth magnet material such as a sumalium / cobalt magnet, neodium / iron / boron magnet). Fine powder and a small amount of organic polymer elastomer (for example, chlorinated polyethylene, chlorosulphonized polyethylene, ethylene / vinyl acetate copolymer, ethylene / propylene rubber, nitrile rubber, acrylic rubber, chloroprene rubber) as a binder. The mixture is formed into a sheet by a molding method such as rolling or extrusion, and magnetized on both sides. The magnetizing pitch of the magnet sheet 20 is preferably 1.0 mm or more and 7.0 mm or less.

The wall material film 30 is a film-like decorative wall material having a thickness of 50 μm to 90 μm, and includes an ink layer 32 on which a pattern or a pattern is printed on the upper surface of the base film 31. As the base film 31, a polyvinyl chloride resin having an ink receiving layer formed on its surface, a thermoplastic resin such as a polyethylene resin, a thin coated paper, or the like can be used. Ink is fixed on this ink receiving layer by printing according to the application. Examples of the printing method include offset printing, letterpress printing, inkjet printing, and thermal transfer printing. The wall material film 30 having such a structure has already been produced. The thickness is set to 90 μ or less in order to keep the total thickness of the magnetic wall material sheet 10 to 540 μ or less, which is the upper limit that can be expected to ensure fire resistance. Further, if it is thicker than necessary, the transmittance of the magnetic force lines from the sheet magnet becomes small, and the magnetic attraction ability as a magnetic wall becomes inferior. The thickness is set to 50 μm or more in order to secure an appropriate tensile strength.

The coat film 40 is a film-like hard matte coat material that simultaneously imparts a hardening function and a matting function to the surface of the wall material film 30 to be laminated. The structure is such that a hard mat layer 42 also having a translucent property is laminated on a base film 41 having a translucent property.
As the base film 41, a transparent thermoplastic resin such as a polyethylene resin whose surface is easily adhered can be used as a main material.
As shown in FIG. 3, the hard mat layer 42 is composed of an acrylic resin material 421 and a large number of acrylic fine particles 422 contained therein.

The surface hardness of the hard mat layer 42 of the coat film 40 alone is 2H in terms of pencil hardness.

The pencil hardness referred to here is, for example, the hardness measured by the pencil hardness test (scratch test) specified in JIS K5600-5-4: 1999. This test shall be performed with a constant load applied to the pencil and the moving speed of the core set to 1 mm / sec. The pencil hardness is the highest hardness at which the surface of the test piece was not scratched in the pencil hardness test. When measuring the hardness of pencils, multiple pencils with different hardness are used, but each pencil is tested 5 times, and 4 out of 5 times, the appearance of scratches on the surface of the test piece. If no abnormality is visually observed, the hardness of the pencil used at the time of the test is defined as the pencil hardness. For example, when the test operation is performed 5 times using a 3H pencil and no appearance abnormality occurs 4 times or more, the pencil hardness of the test piece is at least 3H.

The magnetic wall material sheet 10, which is a laminate of the magnet sheet 20, the wall material film 30, and the surface coat layer 40, preferably has a total thickness of 155 μ to 540 μ. The reason is as follows. That is, as described above, in the magnet sheet 20 of the current technology, when the thickness is 400 μm or more, it is difficult to satisfy the evaluation criteria of the combustion test, and when it is 80 μm or less, it is difficult to secure sufficient magnetic adsorption force. .. From this point of view, the total thickness is within the above range.

Next, a method of manufacturing the magnetic wall material sheet 10 will be described. FIG. 4 is a flow chart of a procedure for manufacturing a magnetic wall material sheet 10 using a dry laminator 60, FIG. 5 is a diagram showing a laminating process in the first step S1 of the procedure for manufacturing a magnetic wall material sheet 10, and FIG. 6 is a diagram showing a magnetic wall material sheet. FIG. 7 is a diagram showing a laminating process in the second step S2 of the manufacturing procedures of 10, and FIG. 7 is a diagram showing a specific manufacturing procedure of the magnetic wall material sheet 10 by the dry laminator 60. In FIG. 7, (a) shows the laminating operation of the first step S1, and (b) shows the laminating operation of the second step S2.

As shown in FIGS. 4 to 7, the magnetic wall material sheet 10 is manufactured by the first step S1 and the subsequent second step S2. Such two-step laminating is performed using, for example, the dry laminator 60 shown in FIG. 7.

In the first step S1, as shown in FIGS. 4, 5 and 7 (a), the coat film 40 is laminated on the wall material film 30 to produce the coated wall material sheet 50. In the second step S2, as shown in FIGS. 4, 6 and 7 (b), the coated wall material sheet 50 manufactured in the first step S1 is laminated on the magnet sheet 20 to obtain the magnetic wall material sheet 10.

Next, the details of the procedure for manufacturing the magnetic wall material sheet 10 by the dry laminator 60 will be described. As shown in FIG. 7, the dry laminator 60 includes unwinders 61 and 62, a gravure coater 63, a drying furnace 64, a heating nip roll 65, a cooling roll 66, a winder 67, and the like. In the following description, it is assumed that the magnet sheet 20, the wall material film 30, and the coat film 40 described above are prepared as rolls, respectively.

In the first step S1, as shown in FIG. 7A, the roll body of the wall material film 30 is set in the unwinder 61, and the roll body of the coat film 40 is set in the unwinder 62 (FIG. 4). Step S11). The wall material film 30 unwound from the unwinder 61 is coated with the adhesive G on the surface on the ink layer 32 side by the gravure coater 63 (step S12), and then dried in the drying furnace 64 to obtain the adhesive. The organic solvent for dilution is removed (step S13). The wall material film 30 from which the organic solvent has been removed is bonded to the coat film 40 unwound from the unwinder 62 by thermocompression bonding on the heating nip roll 65 (step S14), and cooled by the cooling roll 66 (step S15). ), The winder 67 winds up the coated wall material sheet 50 (step S16). The wound coat wall material sheet 50 is cured for a predetermined time (step S17).

In the next second step S2, the rolls set in the unwinders 61 and 62 are replaced. That is, as shown in FIG. 7B, the roll body of the coated wall material sheet 50 is set in the unwinding machine 61, and the roll body of the magnet sheet 20 is set in the unwinding machine 62 (step S21). The coated wall material sheet 50 unwound from the unwinder 61 is coated with the adhesive G on the surface on the base film 31 side by the gravure coater 63 (step S22), and then dried in the drying oven 64 and adhered. The organic solvent for diluting the agent is removed (step S23). The coated wall material sheet 50 from which the organic solvent has been removed is bonded to the magnet sheet 20 unwound from the unwinder 62 by thermocompression bonding on the heating nip roll 65 (step S24), and cooled by the cooling roll 66 (step S25). ), The winder 67 winds up the magnetic wall material sheet 10 (step S26). The wound magnetic wall material sheet 10 is cured for a predetermined time (step S27).

The magnetic wall material sheet 10 manufactured as described above has a total thickness of 540 μ or less, conforms to ISO5660-1, and is Article 2-9 of the Building Standards Act and Article 108-2 of the Building Standards Act Construction Ordinance. In the heat generation test by the cone calorimeter tester according to the fire resistance test method and performance evaluation standard based on [1], the total calorific value for 20 minutes after the start of heating is 8 MJ / m ² or less, and [2] 20 after the start of heating. ^{It has a nonflammability that satisfies the condition that the maximum heat generation rate does not exceed 200 kW / m 2} continuously for 10 seconds or more for 1 minute, and [3] there are no harmful cracks or holes in fire protection for 20 minutes after the start of heating.

Furthermore, in the gas hazard test according to the gas hazard test method according to the Ministry of Construction Notification No. 1231 on August 25, 1976, the evaluation criteria that the average behavioral stoppage time value of mice was 6.8 minutes or more was satisfied. There is. That is, the average value X of the time (behavior stop time) until the eight mice inhaling the generated gas by heating the test piece by the radiant heat from the electric heater and the flame contact in the heating furnace to stop the action and The standard deviation σ is calculated, and the action stop time Xs of the mouse is calculated by the following equation.
Xs = X-σ
It meets the criteria for passing when the value of Xs is greater than 6.8 minutes (mouse pause time in standard wood). Here, the reason why the value obtained by subtracting the standard deviation from the average value of the action stop time is used as the criterion for pass / fail is based on the idea of evaluating including the variation of the material and the test result.
Further, as a result of conducting a test according to the pencil hardness test specified in JISK5600-5-4 (1999), the surface of the hard mat layer 42 to be the wall surface 11 had a pencil hardness of 6H.

The magnetic wall material sheet 10 as described above is used as a wall material sheet for a magnetic wall for indoor use, and specific examples thereof will be described with reference to FIGS. 8 and 9.
FIG. 8 is a perspective view of the magnetic wall 100 provided with the magnetic wall material sheet 10 according to the present invention, and FIG. 9 is a partially disassembled perspective view of the magnetic wall 100.
As shown in FIGS. 8 and 9, the magnetic wall 100 includes a wall base 80, a soft magnetic board 70, and a magnetic wall material sheet 10.

The soft magnetic board 70 includes a gypsum board 71 and a soft magnetic layer 72 laminated on one side of the gypsum board 71. Instead of the gypsum board 71 with the soft magnetic layer described above, a steel plate or a board obtained by laminating a surface sheet or a functional sheet on the steel plate may be used. The soft magnetic board 70 has a soft magnetic layer 72 facing the front side, that is, an indoor space, and has nails, screws, adhesives, staples, etc., against a wall base 80 made of plywood, concrete, light metal, or the like. It is fastened and fixed with. As a specific example of such a soft magnetic board 70, a Tiger Fe board (registered trademark) manufactured by Yoshino Gypsum Co., Ltd. can be mentioned.

A plurality of magnetic wall material sheets 10 are cut into appropriate sizes according to the wall area. Then, the magnetically bonded surface of the magnet sheet 20 in the magnetic wall material sheet 10 is fixed by magnetically attracting it to the surface of the soft magnetic layer 72 of the soft magnetic board 70. As a result, the wall surface 11 of the magnetic wall material sheet 10 functions as a magnetic wall capable of magnetically adsorbing. That is, the surface is designed, and a display piece or an article such as a shelf equipped with a ferromagnet can be attracted and held by magnetic force.

Next, the advantages and advantages of the magnetic wall material sheet 10 in the magnetic wall 100 will be described.

According to the magnetic wall material sheet 10, it is suitable as an interior wall of a building because it satisfies the evaluation criteria of the above test regarding fire resistance.

Further, the magnetic wall material sheet 10 is provided with a coat film 40 containing acrylic fine particles 422 in an acrylic resin material 421 as a top layer, so that incident light diffuses and diffuses on the surface of the acrylic fine particles 422. I'm trying to wake it up. As a result, the base of the pattern or pattern in the wall material film 30 immediately below, that is, the ink layer 32 can be seen as a matte state, and on the wall surface 11, discomfort due to the reflection of light, glare, etc. The deterioration of the design is prevented. Further, when the wall surface 11 is used as the projection surface of the projector, it is possible to suppress the generation of hot spots in which the projection light is locally brightened, and it is possible to project an easy-to-see image regardless of the line-of-sight angle.

This method of causing diffused reflection and diffusion on the surface of the above-mentioned fine particles 422 can improve the flatness of the wall surface 11 and is excellent in erasability, unlike the method of embossing the wall surface.

By the way, this hard mat layer 42 has a pencil hardness of 2H by itself, but by adopting a laminated structure in which the magnet sheet 20 is arranged on the bottom layer, it is 6H, which is much higher than the applicant's expectation. Achieved an improvement in pencil hardness. The physical reason for this has not been clarified at this stage, but the elastic magnet sheet 20 arranged in the lower layer serves as a cushion, which makes the pencil slippery on the wall surface 11 and increases its hardness. It is possible that it may be. Due to this hardness, the scratch resistance and erasability of the wall surface 11 are further ensured. When the pencil hardness is 4H or more, it is quite effective from the viewpoint of scratch resistance and erasability.

Since the erasability is good, the wall surface 11 can be freely written and erased with a writing tool such as a whiteboard marker. Therefore, when used as a projection surface of a projector, the wall surface can be writable together with an image. It is also effective when installed in a children's room. For example, when a whiteboard for graffiti is magnetized on the wall surface 11 of the magnetic wall 100, it often protrudes from the board surface and is drawn on the wall surface as a child's habit. Even if the ink is drawn on the wall surface 11, the ink on the wall surface 11 can be easily erased.

As described above, the magnetic wall material sheet 10 simultaneously has the requirements of fire resistance, scratch resistance that does not easily scratch the wall surface 11, erasability that can easily erase stains, and low gloss.

Other advantages include the following.
That is, since the magnetic wall material sheet 10 can be detachably integrated with the soft magnetic board 70 by magnetic force without using an adhesive, no skillful technique or special special tool is required to replace the wall material sheet. In other words, anyone can easily and quickly remodel the wall material sheet as if it were DIY.

Further, in the magnetic wall 100, the soft magnetic board 70 is arranged on the back surface of the magnet sheet 20 to generate a back yoke effect and increase the magnetic force.
That is, the decrease in magnetic force caused by thinning the magnet sheet 20 in order to secure fire resistance can be covered by the back yoke effect of the soft magnetic board 70, and a sufficient magnetic force, that is, a high surface magnetic flux density can be secured.

Further, as an article in which the magnet sheet 20 is magnetized on the soft magnetic board 70 so that the magnetizing lines are parallel to each other in the horizontal direction and magnetized on the wall surface 11, a magnet sheet having the same magnetizing pitch as the magnet sheet 20 is attached. When a product is prepared, the article and the wall surface 11 can be magnetized with different poles of the striped magnetic poles in each magnet sheet in a horizontal state. At this time, the article can be easily slid in the horizontal direction parallel to the magnetizing line, but cannot be easily slid in the vertical direction orthogonal to the magnetizing line. Therefore, the article can be easily fixed horizontally.

Further, it is effective as a wall surface for magnetically holding a display object or a display object printed on an extremely thin steel plate, specifically, a steel paper (registered trademark) manufactured by the applicant, as well as a magnet sheet.

Although the embodiments of the present invention have been described above, the embodiments disclosed above are merely examples, and the scope of the present invention is not limited to these embodiments. The scope of the present invention is indicated by the description of the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

For example, in the above-described embodiment, the wall material film 30 and the coat film 40 are laminated in this order only on one side of the magnet sheet 20, but the magnet sheet 20 is vertically symmetrical. It is also possible to laminate the wall material film 30 and the coat film 40. In this case, it is necessary to make the total thickness so that fire resistance can be ensured. According to this configuration, for example, when different designs are applied on both sides, that is, when ink layers 32 having different patterns or patterns are applied, even one magnetic wall material sheet can be turned over on the wall surface 11. A magnetic wall material sheet in which two types of wall patterns can be selected can be used.

Further, the base film 31 of the wall material film 30 may be a metal foil such as an aluminum foil. In this case, since the base film itself does not burn, the effect of fire resistance of the magnetic wall material sheet 10 as a whole can be further enhanced.

Further, on at least one of the lower surface of the magnet sheet 20, that is, the magnetically attached surface to the soft magnetic board 70, and between the upper surface of the magnet sheet 20 and the lower surface of the wall material film 30, an aluminum foil having a thickness of, for example, 10 μ to 80 μm. Etc. may be provided. In this case, since at least one of the magnet sheet 20 and the wall material film 30 is covered with a metal foil on the surface, the effect of fire resistance as a whole of the magnetic wall material sheet 10 can be further enhanced. Here, when the thickness is set to the above range, the effect of improving the fire resistance cannot be expected when the thickness is 10 μm or less, and when the thickness is 80 μm or more, the magnetic attraction force on the wall surface 11 and the magnetic attraction force with the soft magnetic board 70 may be weakened. Because it is big. Further, by making this metal foil highly corrosion resistant, it is possible to improve the service life as a wall material. With the above configuration, the total thickness of the magnetic wall material sheet is thicker by the amount of the metal foil than the total thickness of the above embodiment.

Further, in the above-described embodiment, the film-shaped base materials are laminated on the surface of the magnet sheet 20, but the coating liquid may be sequentially applied and cured.

Further, in the above-described embodiment, the wall material film 30 on which the ink layer 32 is formed in advance is provided between the magnet sheet 20 and the coat film 40. For example, the back surface of the base film 41 in the coat film 40 is provided. That is, it is also possible to directly form the ink layer 32 on the non-laminated side surface of the hard mat layer 42, and directly attach the coat film 40 to the magnet sheet 20 via an adhesive. In this configuration, the ink layer 32 can be displayed without the wall-mounted film 30, the total thickness can be reduced, the adhesive layer can be reduced by one layer, and the degree of fire resistance can be improved by that amount.

It can be widely used as a magnetic wall material sheet suitable for application to the interior wall of a building.

10 Magnetic wall material sheet 11 Wall surface 20 Magnet sheet 30 Wall material film (wall material layer)
32 Ink layer (decorative layer)
40 Coat film (surface coat layer)
42 Hard mat layer 421 Acrylic resin material (transparent resin material)
422 fine particles

Claims (4)

A magnetic wall composed of a laminated body including a multi-pole magnetizing type magnet sheet, a transparent surface coating layer having a hardening function and a matting function, and a decorative layer provided between the magnet sheet and the surface coating layer. A magnetic wall material sheet that satisfies the evaluation criteria of the following tests regarding fire resistance performance and has a pencil hardness of 4H or more on the surface of the surface coat layer to be a wall surface.
[Fever test]
In the heat generation test by a cone calorimeter tester that complies with ISO5660-1 and complies with the fireproof test method and performance evaluation standard based on Article 2-9 of the Building Standards Act and Article 108-2 of the Construction Ordinance of the Building Standards Act.
[1] The total calorific value for 20 minutes after the start of heating is 8 MJ / m ² or less.
[2] For 20 minutes after the start of heating, the maximum heat generation rate continued for 10 seconds or more and did not exceed ^{200 KW / m 2.}
[3] Have nonflammability that satisfies the condition that there are no cracks or holes harmful to fire protection for 20 minutes after the start of heating.
[Gas hazard test]
In the gas hazard test according to the gas hazard test method according to the Ministry of Construction Notification No. 1231 on August 25, 1976, the average behavioral stoppage time value of the mice was 6.8 minutes or more. The magnetic wall material sheet according to claim 1, further comprising a wall material layer having a decorative layer on one side, wherein the wall material layer is provided between the magnet sheet and the surface coat layer with the decorative layer facing the surface coat layer. The surface coat layer is a laminate of a translucent base film and a translucent hard mat layer, and the hard mat layer is a transparent resin material containing a large number of fine particles for light scattering. The magnetic wall material sheet according to claim 1 or 2, which is configured as such. The magnetic wall material sheet according to any one of claims 1 to 3, wherein the pencil hardness of the surface of the surface coat layer alone that is on the non-opposite surface side is less than 4H.

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