JP6091029B1 - Window film having magnetic composite layer and double-sided display mechanism - Google Patents

Abstract

[PROBLEMS] To print a different image on one side and the other side, and to create a transparent printing shadow on the opposite side of both sides, which is used by being attached to a window glass, etc. Develop film and double-sided display mechanism. A first member A having a first white opaque layer 2 printed on one side of a first black opaque layer M1 and a transparent adhesive layer 4 provided on the surface thereof, and the M1 can be magnetically adsorbed. The second member B provided with the second white opaque layer 2 printed on one surface of the second black opaque layer M2 is a magnetic composite window film formed by magnetically adsorbing the M1 surface and the M2 surface. In this way, visible light is reflected by the first or second white opaque layer 2 and further transmitted visible light is absorbed by the M1 and the M2, thereby preventing a transmissive printing shadow and replacing a printed image on the indoor side. The second member B is easily replaced, and the magnetic display piece is also easily attached and detached by magnetic adsorption. [Selection] Figure 1

Description

  The present invention relates to a window film on which one side and another side are printed differently and a double-sided display mechanism using the same, and the window film is, for example, a plate glass such as a door, a window, a wall, or a plastic plate. It is affixed by the transparent adhesive layer on the indoor side.

In a light shielding paper in which two paper substrates are laminated via a light shielding layer, the light shielding layer includes a black layer containing a black pigment and a thermoplastic resin, and a white layer containing a white pigment and a thermoplastic resin. And a technique for specifying the amount of pigment added to the resin, the thickness, and the stacking order is disclosed (Patent Document 1).
This technology blocks light from one side and is applied to packaging, containers, etc., but the present invention blocks visible light on the other side of both sides, and the printed image on the front side This is a technique intended to prevent the occurrence of transmissive printing shading (transparent image: image transmitted to the back surface) on the back side, and the object and technique of the present invention are different.

JP 2014-136405 A

Conventional window films are attached to glass plates such as store doors and windows, and when the images on the front side and the back side are different, visible light from the brighter side is transmitted to the back side, so that a transparent printing shadow is created on the back side. There is a tendency to occur. The present invention intends to provide a window film that solves this inconvenience and a double-sided display mechanism using the same.
In addition, the present invention makes it possible to easily replace the printed image on the indoor side, and to easily attach and detach the display piece to the surface thereof.

As a result of various researches to solve the above problems, the inventors have found means for solving the problems as follows.
(1) In the window film of the present invention, a white opaque layer is provided on both sides of a black opaque layer, and a printed image is formed on both sides, so that visible light incident on the surface of both sides is white opaque. The visible light reflected by the layer and further partially transmitted is absorbed by the black opaque layer so that a transmissive printing shadow (transmission image) does not occur on the back side.

(2) Black ferromagnetic powder is used for the black pigment of the black opaque layer, and the black opaque layer is further divided into two in the thickness direction and attached to the glass plate surface of a store window or the like with an adhesive layer. The first member to be used and the second member on the indoor side, and a window film having a magnetic composite layer in which the second member can be easily replaced by allowing the two members to be attached with a magnetic attraction force. .

(3) In addition, multipolar magnetization is suitable for the case where a magnetic film with a magnetic composite layer is required to be magnetically attracted in the longitudinal direction (vertical direction) (shear tensile magnetic attracting force). The magnetic film is subjected to a magnetic attraction method between the magnet films subjected to the above, and the magnetic pole direction is used in a direction perpendicular to the vertical direction (lateral direction).

(4) Further, it is assumed that the magnetic display piece can be easily attached / detached to / from the indoor upper surface of the window film having the magnetic composite layer by the magnetic adsorption force.

  Then, a double-sided display mechanism is obtained by sticking the window film having the magnetic composite layer on a room-side glass plate surface such as a door, window, wall or the like using a transparent adhesive layer.

In more detail, means for solving the problem
(1) A white opaque layer having a printed surface is laminated on one surface of a first black opaque layer mainly composed of a black ferromagnetic powder and an organic polymer elastomer binder. A first black-colored opaque layer is formed on one side of a first composite film that is printed after laminating a first white-colored opaque layer that can be printed on the surface, or a first white-colored opaque layer that is printed on the surface, or by coating The first composite film printed after forming the first black opaque layer on one surface of the first white opaque layer that can be printed on the surface, and the transparent adhesive layer with release paper on the printed surface of the first composite film A first member provided;

The surface was printed on one side of the first black opaque layer and the second black opaque layer capable of being magnetically adsorbed mainly composed of a black ferromagnetic powder and an organic polymer elastomer binder. Second black film on one side of the second composite film printed after the second white opaque layer that can be printed on the surface or laminated with the second white opaque layer, or the second white opaque layer printed on the surface A second member which is a second composite film printed by forming a second opaque layer by coating on one side of a white opaque layer which can be formed or coated on the surface by applying a second opaque layer;
A window film having a magnetic composite layer formed by bonding the surfaces of the first black opaque layer and the second black opaque layer together with magnetic attraction;

  With this configuration, visible light incident on both surfaces is reflected by the first or second white opaque layer, and the transmitted visible light is absorbed by the first black opaque layer and the second black opaque layer. The magnetic material is characterized in that a transparent printing shadow (transparent image) does not occur on the back surface side, and that the second member can be easily replaced by adhering the first member and the second member with a magnetic attraction force. A window film having a composite layer is obtained.

(2) The spinel-type ferrite powder which is a soft magnetic material having high permeability and low coercive force (which becomes a magnet adherend) as the black ferromagnetic powder of the first black opaque layer of the first member. As a film having a thickness of 50 to 180 μm and a filling amount of the ferromagnetic powder with respect to the total amount of the composition comprising the ferromagnetic powder, the organic polymer elastomer, and the processing aid, having a thickness of 50 to 180 μm, The first composite film having a thickness of 50 to 150 μm is used as the first member,

A ferromagnetic powder as a magnetoplumbite type ferrite powder, which is a hard magnetic material (permanent magnet material) having a high magnetic permeability and a high coercive force, as the black ferromagnetic powder of the second black opaque layer of the second member, A permanent magnet film having multi-pole magnetization on one or both sides of a ferromagnetic powder filling amount of 55 to 65% by volume and a thickness of 60 to 250 μm with respect to the total amount of the composition comprising an organic polymer elastomer and a processing aid. A window film having a magnetic composite layer as described in (1) above, wherein the second composite film having a white opaque layer thickness of 50 to 150 μm is used as the second member.

(3) As a magnetoplumbite type ferrite powder, which is a hard magnetic material having a high magnetic permeability and a high coercive force, the ferromagnetic powder, the organic powder, and the black ferromagnetic powder of the first black opaque layer of the first member A permanent magnet film in which the amount of the ferromagnetic powder is 55 to 65% by volume with respect to the total amount of the composition comprising the polymer elastomer and the processing aid and the thickness is 60 to 250 μm and multipolar magnetization is applied to one or both sides, The first composite film in which the thickness of the white opaque layer is 50 to 150 μm is used as the first member,

The black ferromagnetic powder of the second black opaque layer of the second member is used as a spinel ferrite powder, which is a soft magnetic material having a high magnetic permeability and a low coercive force. A composite film in which the filling amount of the ferromagnetic powder with respect to the total amount of the composition comprising the auxiliary agent is 55 to 65% by volume, the thickness is 50 to 180 μm, and the thickness of the white opaque layer is 50 to 150 μm is the second member. A window film having the magnetic composite layer as described in the above item (1).

(4) The black ferromagnetic powder of the first black opaque layer of the first member is used as a magnetoplumbite type ferrite powder, which is a hard magnetic material having a high magnetic permeability and a high coercive force. Permanent magnet film with multi-pole magnetization applied on one or both sides of 55-65% by volume of ferromagnetic powder with respect to the total amount of the composition composed of molecular elastomer and processing aid and having a thickness of 60-250 μm, white The first composite film having a light-colored opaque layer thickness of 50 to 150 μm is used as the first member,

The black ferromagnetic powder of the second black opaque layer of the second member is a magnetoplumbite type ferrite powder, which is a hard magnetic material having high permeability and high coercive force. Between the same pole and a permanent magnet film subjected to multipolar magnetization of the first member having a filling amount of the ferromagnetic powder with respect to the total amount of the composition comprising the processing aid of 55 to 65% by volume and a thickness of 60 to 250 μm. Item (1), wherein the second member is a permanent magnet film having multipolar magnetization on one or both sides, and a second composite film having a white opaque layer thickness of 50 to 150 μm. A window film having a magnetic composite layer of

(5) The spinel-type ferrite powder is a magnetite powder, and the magnetoplumbite-type ferrite powder is a strontium ferrite powder. A window film having a magnetic composite layer of

(6) A window film having the magnetic composite layer according to any one of (1) to (5) is attached to the indoor side of a transparent substrate with a transparent adhesive layer, and the second member is attached to the window. A double-sided display mechanism characterized in that it can be easily detached and replaced.

(7) A window film having the magnetic composite layer according to (2) or (4) above is adhered to the indoor side of a transparent substrate with a transparent adhesive layer, and a soft magnetic material is applied to the surface of the second member. A spinel type ferrite powder, an organic polymer elastomer, and a soft magnetic film having a thickness of 50 to 65% by volume of the spinel type ferrite powder and a thickness of 50 to A soft magnetic display piece composed of a decorative layer of .about.150 .mu.m is detachable over one or more sheets by a magnetic adsorption force.

(8) A window film having the magnetic composite layer described in the above (3) or (4) is attached to the indoor side of a transparent substrate such as a door glass or window glass with a transparent adhesive layer, and the second The filling amount of the magnetoplumbite type ferrite powder is 55 to 65% by volume with respect to the total amount of the composition comprising the magnetoplumbite type ferrite powder, organic polymer elastomer, and processing aid, which is a hard magnetic material, on the surface of the member, and the thickness is The magnetic pole direction of the hard magnetic display piece consisting of a 70-200 μm second member or a permanent magnet film subjected to multipolar magnetization between the same polarity as the first member and a decorative layer having a thickness of 50-150 μm is the second member or In accordance with the magnetic pole direction of the first member, the double-sided display mechanism is characterized in that it can be attached and detached by one or more magnetic attraction forces.

(9) A spinel type ferrite powder as described in the above item (7) is a magnetite powder.

(10) A magneto-plumbite type ferrite powder described in (8) above is a strontium ferrite powder.

(11) The magnetic pole direction of the permanent magnet film used for the window film having the magnetic composite layer described in the above item (4) and subjected to multipolar magnetization on one side or both sides is a direction perpendicular to the vertical direction. By using the double-sided display mechanism, the double-sided display mechanism is characterized in that the tensile shear magnetic attractive force in the vertical direction of the second member is increased.

1. The window film having the magnetic composite layer of the present invention reflects visible light from the surface with a white opaque layer and further absorbs the transmitted visible light with a black opaque layer so that both surfaces are opposite to each other. There is an advantage that a transparent printing shadow of printed pictures and characters does not occur.

2. By using black magnetic powder for the black opaque layer, the black opaque layer is divided into two in the thickness direction, and both can be attached with magnetic adsorption force, making the window film two members Since the indoor member can be easily detached after being attached to a window glass or the like, there is an advantage that the printed image can be easily replaced.

3. The type of magnetic adsorption between magnet films with multi-pole magnetization can obtain a strong (shear tensile magnetic attractive force) load in the vertical direction (vertical direction) by making the magnetic pole direction horizontal. There are advantages.

4. By pasting the window film having the magnetic composite layer of the present invention on the indoor side of a sheet glass such as a door or window of a store with a transparent adhesive film, the printed image on the indoor side can be easily replaced. In addition, there is an advantage that a double-sided display mechanism can be obtained in which a display piece made of a magnetic film can be easily attached and detached with a magnetic attraction force.

5. In addition, there is an advantage that the magnetic display piece can be easily attached and detached to the indoor surface with magnetic adsorption force, and a magnet type using a hard magnetic material (permanent magnet material) for the black ferromagnetic powder of the black opaque layer. For the window film member, multiple magnetic sticking can be performed on one or more display pieces, which are soft magnetic bodies (which are magnet adherends). Further, by using a display piece of a hard magnetic material (permanent magnet) type having the same magnetic pole direction and the same distance between the poles, multiple magnetic sticking can be performed over one or more display pieces.

6. In addition to peeling off the release paper by providing a transparent adhesive layer with release paper on the magnetic window film, the magnetic window film can be easily attached to a transparent substrate. The inconvenience which arises can be prevented. In other words, when the magnetic window film is stored for a long time by stacking, in some cases, the printing surfaces may be blocked (the phenomenon of self-adhesion without using an adhesive depending on temperature, humidity, load, time), flatness There is an advantage of preventing inconvenience that causes deterioration (rippling), deformation due to its own weight during sticking work, and inconvenience of wrinkles.

It is a cross-sectional schematic diagram of the window film which has a magnetic composite layer which shows embodiment of this invention. It is a cross-sectional schematic diagram of the window film which has a magnetic composite layer which shows other embodiment of this invention. It is a cross-sectional schematic diagram of the window film which has a magnetic composite layer which shows other embodiment of this invention. It is a cross-sectional schematic diagram of the window film which has a magnetic composite layer which shows other embodiment of this invention. It is a cross-sectional schematic diagram of the window film which has a magnetic composite layer which shows other embodiment of this invention.

It is a cross-sectional schematic diagram of a double-sided display mechanism showing an embodiment of the present invention. It is a cross-sectional schematic diagram of a double-sided display mechanism showing an embodiment of the present invention. It is a cross-sectional schematic diagram of a double-sided display mechanism showing an embodiment of the present invention. (A) is a cross-sectional schematic diagram of a double-sided display mechanism showing an embodiment of the present invention, and (b) is a partially enlarged schematic cross-sectional view of (a). It is a cross-sectional schematic diagram of a double-sided display mechanism showing an embodiment of the present invention. It is a cross-sectional schematic diagram of a double-sided display mechanism showing an embodiment of the present invention. It is a schematic diagram showing the magnetic pole direction of the multipolar magnetized surface of the black opaque layer using the hard magnetic material (permanent magnet) subjected to multipolar magnetization in the double-sided display mechanism of the present invention, (a) It is a schematic diagram which shows a vertical direction, (b) A figure is a schematic diagram which shows a horizontal direction. It is a front schematic diagram which shows a perpendicular magnetic attraction force measuring apparatus. It is a side surface schematic diagram which shows a tensile shear magnetic attraction force measuring apparatus.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
(1), FIG. 1 is a cross-sectional schematic diagram showing a basic configuration of a window film having a magnetic composite layer of the present invention and an example thereof. A in the basic configuration is a first on the side to be attached to a window or the like. B is a second member that is magnetically attracted to the first member A, M1 is a first black to black-brown (referred to as “black”) opaque layer of the first member A, and M2 is a second member B. It is an essential condition that the first black opaque layer M1 and the second black opaque layer M2 are magnetically attracted by the second black opaque layer, and W is formed by magnetically attracting the first member A and the second member B. The window film which has a magnetic composite layer is shown.
A1 is an example of a soft magnetic layer (magnet adherend) type first member A, B1 is an example of a hard magnetic (permanent magnet) type second member B, and W1 is a winch having a magnetic composite layer. An example of the dough film W, 11 is a black opaque layer using a soft magnetic material (magnet adherend), and 12 is a hard magnetic material (permanent magnet) subjected to single-sided multipolar magnetization (see FIG. 12). 1a is a black opaque layer in which a black opaque layer 11 using a soft magnetic material and a black opaque layer 12 using a hard magnetic material are formed by magnetic adsorption.
2 is a white (or white) opaque layer that can be printed with white or other colors that can be printed on its surface, 3 is a printing ink layer, 4 is a transparent adhesive layer (pressure-sensitive adhesive layer), 5 Denotes a release paper, and 8 denotes a main magnetic flux.
In addition, description of the back leakage magnetic flux of the black opaque layer 11 using a soft magnetic material (magnet adherend) is omitted.

  The first black opaque layer M1 and the second black opaque layer M2 are mainly composed of a black magnetic powder and a plastomer or elastomer that is a binder, and a spinel type that is a soft magnetic powder as the magnetic powder. Magnetite (synthetic magnetite or magnetite whose main component is triiron tetroxide) powder, maghemite (gamma sesquioxide) powder, nickel / zinc ferrite powder, manganese / zinc ferrite powder, and hard magnetic material powder Examples of the magnetoplumbite type ferrite include strontium ferrite powder, barium ferrite powder, and mixtures thereof.

  Plastomers or elastomers that are binders include plastomers such as plasticized vinyl chloride, acrylic resin (ethylene ethyl acrylate) chlorinated polyethylene resin, chlorinated polyethylene elastomers, chlorosulfonated polyethylene elastomers, and ethylene vinyl acetate. Polymer based elastomers, ethylene propylene based elastomers, ethylene ethyl acrylate based elastomers, polyamide based elastomers, polyester based elastomers, polyurethane based elastomers, etc. may be mentioned, and the total amount consisting of black based magnetic material powder, caking additive, processing aid, etc. The filling amount of the magnetic material powder is desirably about 55 to 65% by volume in order to obtain a magnetic attractive force. If it is less than 55% by volume, the magnetic attractive force is insufficient in some cases, and if it exceeds 65% by volume, the workability is lowered and the magnetic attractive force is more than necessary.

  When black magnetic powder is soft magnetic material powder (magnet adherend material powder), the thickness is preferably 50 to 180 μm, and if it is thinner than 50 μm, it may prevent transmission printing shadows (transmission image) and magnetic adsorption. When the force is insufficient and the thickness is larger than 180 μm, the handling becomes bulky and uneconomical. In addition, in the case of hard ferromagnetic material powder (permanent magnet material powder), the thickness is preferably 60 to 250 μm, preferably less than 60 μm in consideration of the multiple magnetic sticking of the display piece made of soft magnetic material. Adsorption power and the effect of preventing transmissive printing shading (transparent image) are insufficient.

  The production of the black opaque layer uses a magnetic material powder, a binder (organic polymer elastomer), and a composition comprising a small amount of processing aid, and a known magnet sheet molding method (rolling molding, extrusion rolling molding, etc.) ) And magnetic material powder, a binder (organic polymer elastomer), a small amount of processing aid, and a coating molding method comprising a solvent. In coating molding, a comma coater, a reverse roll coater, a gravure coater (with a smoothing knife) and the like are suitable.

  The white opaque layer 2 whose surface can be printed is obtained by applying an ink receiving layer to a synthetic paper, a plastic film filled with white inorganic powder, or a plastic film surface coated with a paint containing white inorganic pigment powder. For the synthetic paper, grades corresponding to various printing inks may be selected. Examples of synthetic paper include YUPO synthetic paper FEB, FGS, FPG, VJFP, VJF, etc. (manufactured by YUPO CORPORATION), Toyojet GP, MW, MT, YP, etc. (manufactured by Toyobo Co., Ltd.), Peach Coat SPY , MP, etc. (manufactured by Nisshinbo Co., Ltd.), and examples of the plastic film containing inorganic powder include semi-rigid vinyl chloride film-10P (manufactured by Riken Technos), etc. The thickness of the ink-jet receiving layer is preferably 2 μm to 20 μm, and if it is thinner than 2 μm, the ink receiving ability becomes insufficient, and if it is thicker than 20 μm, it becomes an unnecessary receiving layer and is uneconomical.

  Examples of the paint containing white inorganic pigment powder include polyester SS16-611 (manufactured by Toyo Ink Co., Ltd.), polyester PAL mat 8, polyester RAM, urethane acrylic ULA (manufactured by Seiko Advance Co., Ltd.). It is done.

  The coating containing the white inorganic pigment powder 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.

  The treating agent used for forming the ink receiving layer is not particularly limited and a commercially available one can be used. However, as the treating agent used for forming the ink jet receiving layer, for example, Pateracol IJ-150R (inorganic filler-containing urethane resin system) Dispersion) DIC Corporation, RSI-100 (inorganic filler-containing hybrid resin dispersion) DIC Corporation, MZ-477, MZ-480, (inorganic filler-containing acrylic resin dispersion) Takamatsu Oil The product made by Co., Ltd. is mentioned. A known coating device can be used, and examples include an air knife coater, a blade coater, a bar coater, a comma coater, a gravure coater, a roll coater, a reverse roll coater, and a curtain coater.

The white transparent layer 2 can be bonded to the first black opaque layer M1 and the second black opaque layer M2 by a known method using an adhesive and a laminator. Examples of the adhesive used in this case include polyester (two-component) AP-368A / B (manufactured by Chuo Rika Co., Ltd.), polyester (two-component) TM595 / CAT56 (manufactured by Toyo Morton Co., Ltd.), and the like. Can be mentioned.
The thickness of the white opaque layer 2 on the side where the magnetic display piece is to be adhered is preferably 50 μm to 150 μm. If the thickness is less than 50 μm, the effect of preventing transmission shadows and the black opaque layer will not be sufficiently concealed with black, resulting in a decrease in commercial value. When the thickness is greater than 150 μm, in some cases, a decrease in magnetic attractive force due to the air gap of the magnet cannot be ignored.

The printing ink layer 3 may be printed or applied by a printing method (ink jet, offset, flexo, gravure, screen, etc.) suitable for an illustration to be applied, and the cross section is an intermittent or continuous printing ink layer.
The transparent pressure-sensitive adhesive layer (pressure-sensitive adhesive) 4 is substantially colorless and transparent, and has a layer thickness of about 25 to 80 μm (for example, Dainippon Ink Chemical Co., Ltd. Daitak Z87012 / acrylic 0.05 mm thickness) or transparent film base A double-sided adhesive layer of the material (for example, Daitatsu Ink Chemical Co., Ltd., Daitac 8625S, acrylic 0.08 mm thick) is desirable. If the layer thickness is less than 25 μm, the adhesive strength may be insufficient in some cases, and if it is 80 μm or more, there may be a possibility of causing an image perspective failure. In addition, when the white opaque layer 2 that can be printed at the time of replacement (peeling) after the first member A of the window film having the magnetic composite layer is pasted on the transparent substrate T (see FIG. 6) is a synthetic paper. Depending on the synthetic paper, a weak surface layer may be left on the surface of the transparent substrate T, which may cause inconvenience, but this can be prevented by using the double-sided adhesive layer of the transparent film substrate.

(2), FIG. 2 shows a configuration of a window film W2 having a magnetic composite layer in which the black opaque layer 11 using the soft magnetic material and the black opaque layer 12 using the hard magnetic material in FIG. 1 are interchanged. It is a cross-sectional schematic diagram, A2 is a single-sided multipolar magnetic film type first member of a hard magnetic body (permanent magnet), and B2 is a soft magnetic layer (magnet adherend) type second member. The second member B1 in FIG. 1 has the advantage that it can be posted or stored by magnetically attracting other steel plates such as steel blackboards and steel lockers. Is inconvenient. On the other hand, the second member B2 of the soft magnetic layer (magnet adherend) type in FIG. 2 does not emit magnetic flux, and therefore has an advantage that it can be easily handled by a plurality of sheets (1b is a black system using a hard magnetic body) This shows a black opaque layer in which the opaque layer 12 and the black opaque layer 11 using a soft magnetic material are magnetically adsorbed).

(3), FIG. 3 shows a window film W3 having a magnetic composite layer including a black opaque layer 13 using a hard magnetic material (permanent magnet) in which the second black opaque layer M2 is subjected to double-sided multipolar magnetization. It is a cross-sectional schematic diagram showing the configuration, A3 is a soft magnetic layer (magnet adherend) type first member, B3 is a hard magnetic body (permanent magnet), a single-sided multipolar magnetized film type second member. When the window film W3 having the magnetic composite layer is relatively thick, the magnetic flux is leaked from the indoor side surface (the surface of the member B) of the window film W3 having the magnetic composite layer. There is an advantage in that a large number of body types) can be stacked and magnetically attached. (1c shows a state where the black opaque layer 11 using a soft magnetic material and the black opaque layer 13 using a hard magnetic material are magnetically adsorbed)
Note that the description of the back leakage magnetic flux of the black opaque layer 11 using a soft magnetic material is omitted.

(4), FIG. 4 shows a black opaque layer 12 using a hard magnetic material (permanent magnet) in which the first black opaque layer M1 and the second black opaque layer M2 are both subjected to single-sided multipolar magnetization. It is a cross-sectional schematic diagram which shows the structure of the window film W4 which has a magnetic composite layer to contain, A4 is a hard magnetic body (permanent magnet), a single-sided multipolar magnetized film type | mold 1st member, B4 is a hard magnetic body (permanent magnet) The single-sided multipolar magnetized film type second member. The window film W4 having this magnetic composite layer has a magnetic pole direction perpendicular to the vertical direction (transverse direction), and a vertical shear tensile magnetism between the first member A and the second member B. It is a specification that focuses on the strong attraction force, and is suitable when a relatively heavy object is attached to the second member B.

  The phenomenon that a strong magnetic tensile force in the vertical direction is obtained between the first member A4 and the second member B4 is that hard magnetic films (permanent magnet films) subjected to multipolar magnetization between the same poles are magnetized. When attracted, the tensile shear magnetic attracting force in the direction perpendicular to the magnetic pole direction is the maximum compared to the other directions, and is almost equal to the perpendicular magnetic attracting force (the magnetic attracting force perpendicular to the magnetized surface). Equivalent values are obtained. That is, the ratio of the perpendicular magnetic attractive force and the tensile shear magnetic attractive force perpendicular to the magnetic pole direction is approximately 1: 1, but the perpendicular magnetic attractive force and the tensile shear magnetic attractive force parallel to the magnetic pole direction are The ratio is approximately 1: 0.5. Further, the ratio of the perpendicular magnetic attractive force to the smooth steel plate and the tensile shear magnetic attractive force (the direction is not related) is about 1: 0.5.

As a necessary condition, the magnetic pole directions of the multipole magnetization of the first member A4 and the second member B4 are orthogonal (transverse) directions with respect to the vertical (vertical) direction, and between the poles of the multipolar magnetization of both A4 and B4 Is the same.
If the poles of the multipolar magnetizations of both A4 and B4 are not the same, the opposing magnetic poles are not all different poles, causing inconveniences that cause repulsion of the same polarity (a magnet with multipolar magnetization applied) This can be said for the general specifications for magnetically adsorbing films, and it is necessary to maintain the same distance even when parallel to the magnetic pole direction).

(5), FIG. 5 shows the configuration of the single-sided multipolar magnetized film type first member A4 made of hard magnetic material (permanent magnet) and the hard magnetic material (permanent magnet) between the first member A4 and the same polarity. With respect to the black opaque layer 12 using the configuration of the pole-magnetized film-type second member B3 and the hard magnetic material (permanent magnet material) magnetized on one side in the direction of the magnetic pole, the second member B3 It is a cross-sectional schematic diagram which shows the structure of the window film W5 which has the magnetic composite layer using the black type opaque layer 13 using the hard magnetic body (permanent magnet material) which gave both sides magnetization to the magnetic pole direction. The window film W5 having a magnetic composite layer has a strong vertical tensile magnetic attractive force as in the above item (4), and uses a hard magnetic material (permanent magnet) subjected to double-sided multipolar magnetization. Since the black opaque layer 13 is used, the leakage flux in the room direction is strong when the thickness is relatively thick, and there is an advantage that a large number of magnetic display pieces (soft magnetic material type) can be stacked and pasted.

(About a double-sided display mechanism using a window film having the magnetic composite layer of the present invention)
(6), FIG. 6 is a schematic cross-sectional view showing a basic configuration of a double-sided display mechanism using a window film having a magnetic composite layer of the present invention and an example of the double-sided display mechanism of the present invention. In the basic configuration, S represents the double-sided display mechanism of the present invention, T is a transparent substrate (transparent glass plate for a door, window, show window, wall, etc., transparent plastic plate) (same in subsequent drawings), W10 is the present invention. The release film 5 of the window film W having the magnetic composite layer is shown. W11 of the double-sided display mechanism as an example thereof shows a state where the release paper 5 of the window film W1 having the magnetic composite layer of the present invention shown in FIG. 1 is peeled off and attached to the transparent substrate T.
By sticking the window films W10 and W11 having the magnetic composite layer of the present invention on the transparent substrate T, a double-sided display mechanism can be obtained in which different patterns are printed on both sides and no transmission shadow is produced on the back side.
In addition, description of the back leakage magnetic flux of the black opaque layer 11 using a soft magnetic material (magnet adherend) is omitted.

  Magnetic attraction of the display piece magnetically attracts the soft magnetic display piece (magnet adherent type) C1 by the back leakage magnetic flux of the second member B (see FIG. 1), and the soft magnetic display piece C1 is magnetized and further leaks to the back side. A plurality of soft magnetic display pieces C1 can be adhered by generating magnetic flux. (FIG. 6 shows one display piece, but one or more sheets can be attached in layers.)

  The soft magnetic film (magnet adherend) 9 of the soft magnetic display piece C1 is a spinel-type ferrite powder [magnetite (main component is iron trioxide), which is a soft magnetic material powder having high permeability and low magnetic force. Some synthetic magnetite or magnetite)] powder, maghemite (gamma sesquioxide powder, Ni / Zn ferrite powder, etc.) and organic polymer plastomer to elastomer (plasticized vinyl chloride, acrylic resin, chlorinated polyethylene) Plastomers such as resins, chlorinated polyethylene elastomers, chlorosulfonated polyethylene elastomers, ethylene vinyl acetate copolymer elastomers, ethylene propylene elastomers, ethylene ethyl acrylate elastomers, polyamide elastomers, polyester elastomers, polyurethanes System elastomer, etc.) and the filling amount of the soft magnetic powder to the total amount consisting of processing aids about 55 to 65 volume% in order to obtain a magnetic attraction force is desired. If the filling amount is less than 55% by volume, the magnetic attractive force is insufficient in some cases, and if it exceeds 65% by volume, the workability is reduced and the magnetic attractive force is more than necessary, which is uneconomical.

  The thickness of the soft magnetic display piece C1 is preferably 40 to 180 μm. If the thickness is less than 40 μm, the magnetic attractive force is insufficient in some cases, and if it is more than 180 μm, it is bulky in handling and uneconomical. The decorative layer 7 may be printed or laminated with a thickness of 50 to 150 μm. If the thickness is less than 50 μm, the hiding power to the magnetic layer may be insufficient. If the thickness is more than 150 μm, the influence of the air gap of the magnet cannot be ignored. It is an economy.

(7), FIG. 7 is a schematic cross-sectional view showing a double-sided display mechanism S2 using the window film W21 having the magnetic composite layer from which the release paper 5 of the window film W2 having the magnetic composite layer of FIG. 2 is removed. The second member B (see FIG. 1) is a soft magnetic body (magnet adherend) 11 and shows that the hard magnetic (magnet type) display piece C2 is magnetically attracted to the back leakage magnetic flux. By making the gap between the hard magnetic display pieces C2 the same as that of the member A, the hard magnetic display piece C2 forms a magnetic circuit with the magnetic poles of the first member A (see FIG. 1) via the second member B, thereby forming the hard magnetism. A plurality of display pieces C2 can be attached in layers (FIG. 7 shows two display pieces, but one or more display pieces can be attached in layers).

  The hard magnetic film (permanent magnet) 10 of the hard magnetic display piece C2 is a magnetoplumbite type ferrite powder, which is a hard magnetic material powder having a high permeability and a high coercive force [strontium ferrite powder, barium ferrite powder, a mixture thereof. Etc.] and organic polymer plastomers to elastomers (plastomers such as plasticized vinyl chloride, acrylic resin, chlorinated polyethylene resin, etc., and chlorinated polyethylene elastomers, chlorosulfonated polyethylene elastomers, ethylene vinyl acetate) Copolymer elastomer, ethylene propylene elastomer, ethylene ethyl acrylate elastomer, polyamide elastomer, polyester elastomer, polyurethane elastomer, etc.) and processing aids In the filling amount is 55 to 65 volume sex powder, the filling amount of the soft magnetic powder of about 55 to 65 volume% in order to obtain a magnetic attraction force is desired. If the filling amount is less than 55% by volume, the magnetic attractive force is insufficient in some cases, and if it exceeds 65% by volume, the workability is lowered and the magnetic attractive force is more than necessary, which is uneconomical. The thickness of the hard magnetic film 10 is preferably 60 to 200 [mu] m, and if it is thinner than 60 [mu] m, the magnetic attractive force is insufficient in some cases, and if it is thicker than 200 [mu] m, it is bulky in handling and uneconomical. The decorative layer 7 may be printed or laminated with a thickness of 50 to 150 μm. If the thickness is less than 50 μm, the hiding power to the magnetic layer may be insufficient. If the thickness is more than 150 μm, the influence of the air gap of the magnet cannot be ignored. It is an economy.

In addition, the hard magnetic display piece C2 may be used on both sides of the magnetic layer by providing a decorative or printed layer having a thickness of 50 to 150 μm on both sides.
In addition, the magnetic black opaque layer of the magnetic display piece (single-sided and double-sided use) has a window film having a magnetic composite layer to be stuck in addition to obtaining a magnetic adsorption force, or the pattern of the display piece to be overlaid is the display piece. It also has the effect of preventing the phenomenon that appears as a transmission shadow on the surface.

(8), FIG. 8 is a schematic cross-sectional view showing a double-sided display mechanism S3 using a window film W31 having a magnetic composite layer obtained by removing the release paper 5 of the window film W3 having the magnetic composite layer of FIG. Since the second member B is a hard magnetic body (magnet) magnetized on both sides, a plurality of soft magnetic display pieces (magnet adherent type) C1 are stacked with a strong external leakage magnetic flux when the thickness is relatively large. There is an advantage that can be attached.
In addition, description of the back leakage magnetic flux of the soft magnetic body (magnet adherend) 11 is omitted.
(FIG. 8 shows one display piece, but one or more display pieces can be stacked and pasted.)

FIGS. 9A and 9A are schematic cross-sectional views showing a double-sided display mechanism S41 using a window film W41 having a magnetic composite layer obtained by removing the release paper 5 from the window film W4 having the magnetic composite layer of FIG. This is a figure, and since a strong shear tension magnetic shear force in the vertical direction can be obtained, it is suitable when a relatively heavy second member B (inner side member) is used (described in (4)).

FIG. 9B is a partially enlarged conceptual diagram (cross-sectional schematic diagram) of FIG. 9A showing a state of adsorption of magnetic poles of a magnet film subjected to single-sided multipole magnetization. Depending on the thickness of the magnetic film and the distance between the poles and whether the magnet is anisotropic or isotropic, if the thickness is less than half of the gap between the poles, a weak different polarity will occur on the back of the magnetic pole of the multipolar magnetized surface. (Displayed in n (lower case) and s (lower case)), so that a large number of display pieces can be stuck on each other by forming a magnetic circuit by magnetic attraction by different polar attraction and repulsion (see FIG. (Omitted description of weak poles). Further, as an indispensable condition, the three magnetic poles of the first member A, the second member B, and the hard magnetic display piece C2 are the same.
(FIG. 9 shows two display pieces, but one or more pieces can be laminated and pasted.)

(10), FIG. 10 is a schematic cross-sectional view showing a double-sided display mechanism using a window film W41 having a magnetic composite layer obtained by removing the release paper 5 of the window film W4 having the magnetic composite layer of FIG. As in the previous item (9), since a strong shear tension magnetic shear force in the vertical direction can be obtained, it is suitable when a relatively heavy second member B (inner side member) is used.
The soft magnetic display piece C1 is magnetized by the back leakage magnetic flux of the second member B, and further the back leakage magnetic flux is generated, thereby enabling multiple attachment of the soft magnetic display piece C1. (FIG. 10 shows two display pieces, but one or more pieces can be laminated and pasted.)

(11), FIG. 11 is a schematic cross-sectional view showing a double-sided display mechanism using a window film W51 having a magnetic composite layer obtained by removing the release paper 5 of the window film W5 having a magnetic composite layer of FIG. The vertical magnetic shear force is strong and the hard magnetic films (permanent magnet films) of the first member A and the second member B are relatively thick. There is an advantage that a large number of body type (magnet adherends) display pieces can be laminated and pasted.
Regarding the shear tension magnetic attraction force in the vertical (longitudinal) direction, it is the same as in the previous item (4), and as a prerequisite, the magnetic pole direction of multipolar magnetization is the (transverse) direction perpendicular to the vertical (vertical) direction, The gap between the two is the same. (FIG. 11 shows two display pieces, but one or more pieces can be laminated and pasted.)
In addition, the soft magnetic display piece C1 may be used on both sides of the magnetic layer by providing a printed or laminated film having a thickness of 50 to 150 [mu] m as a decorative layer on both sides of the magnetic layer.

Note that the surface of each magnetic layer of the first black opaque layer, the second black opaque layer, and the display pieces C1 and C2 of the window film having a magnetic layer has a magnetized surface of a known magnet sheet depending on the application environment. Similarly, it is desirable to provide an antiblocking layer.

Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited thereto.
The composition and performance evaluation of Examples 1 to 7 of the window film having the magnetic composite layer are summarized in Table 1, the structure and performance evaluation of Comparative Examples 1 to 7 are summarized in Table 2, and the magnetic composite layer is Table 3 summarizes the configuration and performance evaluation of Examples 8 to 14 of the double-sided display mechanism using the window film, and Table 4 summarizes the configuration and performance evaluation of Comparative Examples 8 to 14.

1. Preparation of first member A (1) Preparation of black opaque layer (soft magnetism) 11 and white opaque layer 2 with printable surface 1) Preparation of white opaque layer Polyester synthetic paper Krisper K2311 (Toyobo) (Made by Co., Ltd.) 38 μm thick × 930 mm wide surface, using a known comma coater with an ink jet ink receiving layer forming material MZ480 (inorganic filler-containing acrylic resin dispersion) (manufactured by Takamatsu Resin Co., Ltd.) The synthetic paper for ink jet printing having a thickness of 50 μm is obtained by applying to dry and drying.

2) Formation of black opaque layer on one side of white opaque layer (formulation of coating liquid) (formulation No1)
-Ethylene / vinyl acetate copolymer Product name: EVAFLEX EW-40LX (VA 41%)
[Elastomer] made by Mitsui DuPont Polychemical Co., Ltd. 8.69 parts by weight, ethylene / vinyl acetate copolymer Product name: EVAFLEX V-5572ET (VA 33%)
Mitsui-DuPont Polychemical Co., Ltd. [Elastomer] ... 3.72 parts by weight Magnetite BL-10 Titanium Industry Co., Ltd. [Soft magnetic material powder] ... 100 parts by weight, methyl ethyl ketone [Organic solvent] ... 30 parts by weightToluene [Organic solvent] ...・ ・ ・ ・ ・ ・ 90 parts by weight [filling amount of magnetic material powder in solid content: 89.0% by weight (60.0% by volume)]

(Creation of coating liquid)
In accordance with the above formulation, an organic solvent and an elastomer were charged into a stirrer (disper; shear type blade diameter 200 mm), dissolved with stirring, and then mixed with magnetic stirring while stirring, and then a sand mill (beads; 1.25 mm, disk; Dispersion processing is performed at a flat type and a peripheral speed of 12 m / s).

(coating)
The viscosity of the coating liquid is adjusted to a viscosity suitable for coating with a stirrer immediately before coating. Next, the white opaque layer surface is coated to a thickness of 60 μm after drying with a known comma coater comprising an unwinder / comma coater head / drying furnace / nip roll / cooling roll / winder using the coating liquid. Thus, a black opaque layer is obtained. In addition, the temperature conditions of a drying furnace shall be 50-100 degreeC x 10 minutes.

3) Printing processing Ink jet printer / VJ-1626UH (LED-UV lamp), ink: VJ-LUHI series 7 colors (on the surface of the white opaque layer in which the white opaque layer is formed on the white opaque layer) Print the design at Muto Kogyo Co., Ltd.

4) Giving a transparent adhesive layer with release paper Laminate a transparent substrate-less double-sided adhesive tape DAITAC Z87012W (Dainippon Ink Chemical Co., Ltd.) on one side of the printed multilayer film using a known laminator. The first member A is obtained by applying a transparent adhesive layer with release paper.

2. Creation of second member B
(1) Preparation of Black Opaque Layer (Hard Magnetic) 12 and White Opaque Layer 2 with Printable Surface 1) Preparation of White Opaque Layer Same as 1) of Example 1 (1).

2) Formation of black opaque layer on one side of white opaque layer (formulation of coating liquid) (formulation No2)
Example 1 of Example 1 except that the black magnetic material was replaced with anisotropic strontium ferrite powder (trade name: FH801 manufactured by Toda Kogyo Co., Ltd.), which is a hard magnetic material powder (permanent magnet material powder). The same process as in 2) of (1) of 1 member A is performed.
[Filling amount of magnetic material powder in solid content: 89.0% by weight (60.0% by volume)]

(Creation of coating liquid)
In accordance with the above formulation, an organic solvent and elastomer were added to a stirrer (disper; shear type blade diameter 200 mm), dissolved with stirring, and then anisotropic strontium ferrite powder (trade name: MA951 (made by Toda Kogyo Co., Ltd.)) was added while stirring. The mixed and stirred product is subjected to a dispersion treatment with a sand mill (beads: 1.25 mm, disk: flat type, peripheral speed 12 m / s).

(coating)
The viscosity of the coating liquid is adjusted to a viscosity suitable for coating with a stirrer immediately before coating. Next, using the above coating liquid on the surface of the white opaque layer, a drying furnace / nip roll / cooling roll / winding machine having a permanent magnet type magnetic field orientation device immediately before the unwinding machine / comma coater head / drying furnace With a magnetic layer forming coater, a black opaque layer is obtained by coating to a thickness of 60 μm after drying. In addition, the temperature conditions of a drying furnace shall be 50-100 degreeC x 10 minutes.
(Single-sided multipolar magnetization)
Multipolar magnetization with a pitch of 2 mm between the poles is performed laterally by a magnetizing apparatus comprising a magnetizing power source (DC, pulse) and a magnetizing yoke, which is a known magnetizing method.

3) Printing process Ink jet printer / VJ-1626UH (LED-UV lamp), ink: VJ-LUHI series 7 colors on the surface of the white opaque layer in which the black opaque layer is formed on the white opaque layer. Print the design at (Mutoh Industries).

3. Magnetic bonding A window film having a magnetic composite layer is obtained by bonding the first member A and the second member B with a magnetic attraction using a laminator.

1. Preparation of first member A Transparent base material-free double-sided adhesive tape Daitac Z87012W (Dainippon Ink Chemical Co., Ltd.) on the printed surface of a multilayer film that has been printed in the same manner as second member B of Example 1 The first member A is obtained by attaching a transparent adhesive layer with a release paper by pasting together (made by company) using a known laminator.

2. Creation of second member B The second member B is a multilayer film (not provided with a transparent adhesive layer with a release paper) that has been subjected to printing and produced in the same manner as the first member A of Example 1.

3. Magnetic bonding In the same manner as in Example 1, a window film having a magnetic composite layer is obtained.

1. Production of first member A The same procedure as in Example 1 was performed except that the thickness of the black opaque layer was 90 μm, the white opaque layer was PP synthetic paper 115 μm, and the printing method was screen printing.
(1) White opaque layer Polypropylene resin synthetic paper peach jet SPUY-115 SIP (compatible with ink jet printing) 115 μm thick, 914 mm wide (made by Nisshinbo Industries, Inc.) is used.
(2) Printing process On the surface of the white opaque layer, screen printing ink: UV curing process ink FDSS14 series, 4 colors (manufactured by Toyo Ink Co., Ltd.), screen: 380 mesh, curing: 120W metal halide lamp prints a different pattern Apply.

2. Preparation of second member B The same procedure as in Example 1 was performed except that the thickness of the black opaque layer was 90 μm, the white opaque layer was PP synthetic paper 115 μm, and the printing method was screen printing.
The white opaque layer and the printing method are the same as those of the A member for screen printing.
(Double-sided multipolar magnetization)
The black opaque layer is subjected to multi-pole magnetization with a 2 mm pitch between the poles side by side with a magnetizing device comprising a magnetizing power source (direct current, pulse) and a magnetizing yoke, which is a known magnetizing method.
3. Magnetic bonding In the same manner as in Example 1, a window film having a magnetic composite layer is obtained.

1. Creation of first member A The same procedure as in Example 2 was performed except that the thickness of the black opaque layer was 70 μm, the thickness of the white opaque layer was 90 μm, and the magnetic pole direction was vertical.
(1) White Opaque Layer Polyester Synthetic Paper Crisper K2323 (Toyobo Co., Ltd.) MZ480 (inorganic filler-containing acrylic resin dispersion) which is an ink jet ink receiving layer forming material on a 75 μm thick × 930 mm wide surface A synthetic paper for ink jet printing having a thickness of 90 μm is obtained by applying a 15 μm thickness using a known comma coater (made by Takamatsu Yushi Co., Ltd.) and drying.

2. Preparation of second member B Except for not providing an adhesive layer, the same as in member A, 3. Magnetic bonding In the same manner as in Example 1, a window film having a magnetic composite layer is obtained.

1. Creation of first member A The same procedure as in Example 4 was performed except that the magnetic pole direction was horizontal.
2. Creation of second member B The same procedure as in Example 4 was performed except that the magnetic pole direction was horizontal and double-sided multipolar magnetization was used. Thus, double-sided multipole magnetization is performed in the same manner as the second member B of the third embodiment.
3. Magnetic bonding In the same manner as in Example 1, a window film having a magnetic composite layer is obtained.

1. Preparation of first member A The same procedure as in Example 4 was performed except that the thickness of the black opaque layer was 90 μm and the thickness of the white opaque layer was 100 μm.
(1) White opaque layer Polyester synthetic paper Krisper K2323 (manufactured by Toyobo Co., Ltd.) MZ480 (inorganic filler-containing acrylic resin dispersion) which is an ink jet ink receiving layer forming material on a 75 μm thick × 930 mm wide surface ( A synthetic paper for ink jet printing having a thickness of 100 μm is obtained by applying to a thickness of 25 μm with a known comma coater using Takamatsu Yushi Co., Ltd. and drying.

2. Preparation of second member B Same as the first member A except that the thickness of the black opaque layer is 150 μm and double-sided multipolar magnetization is used.
(1) Black opaque layer (formulation) (formulation No2)
Chlorinated polyethylene (elaslen 301A) manufactured by Showa Denko KK [elastomer]
100 parts by weight Epoxidized soybean oil (W100EL) made by DIC Corporation ... 5 parts by weight calcium stearate (SC-100) made by Sakai Chemical Co., Ltd. .. 1 part by weight dilauryl thiopropionate (Sumilyzer TPL-R) manufactured by Sumitomo Chemical Co., Ltd.
0.3 parts by weight Anisotropic strontium ferrite powder / mechanical orientation (OP-56) manufactured by DOWA F-Tech Co., Ltd. [Hard magnetic material] ... .... 711 parts by weight Filling amount of magnetic material powder 87.0% by weight (59.0% by volume)

(Pellet creation)
According to the above blending, the mixture is kneaded at 120 ° C. for 15 minutes with a pressure kneader (40 L), cooled, and then crushed pellets are prepared with a hammer-type pulverizer.

(Creation of magnetic film)
The pellets are subjected to pellet rolling with a φ18 inch two-roll mill (surface temperature 80 ° C.) to obtain a black opaque layer having a thickness of 150 μm.
(2) Laminating white opaque layer on black brown opaque layer

Using a known dry laminator consisting of unwinder / gravure coater head / dryer / heating roll / unwinding machine / nip roll / cooling roll / winding machine, the same synthetic paper as the white opaque layer of member A is bonded. The raw material of the member B is obtained by laminating the black to black brown opaque layer with an agent.
The conditions at this time were: adhesive; Hydran HW-311 (manufactured by DIC Graphics), coating thickness: 2-3 μm, thermal activation temperature: 80-90 ° C., nip roll; rubber roll hardness; Shore 60 linear pressure; About 150 N / cm.

(3) Double-sided multipolar magnetization A magnetizing device comprising a magnetizing power source (DC, pulse) and a magnetizing yoke, which is a known magnetizing method, on the surface of the black opaque layer of the original material of the second member B Then, multi-pole magnetization with a pitch of 2 mm between the poles is applied to the side of the magnetic pole side by side.
3. Magnetic bonding In the same manner as in Example 1, a window film having a magnetic composite layer is obtained.

1. Creation of first member A The same procedure as in Example 6 was performed, except that the magnetic pole direction of the black opaque layer was transverse.
2. Creation of second member B The same procedure as in Example 6 was performed, except that the magnetic pole direction of the black opaque layer was transverse.
3. Magnetic bonding In the same manner as in Example 1, a window film having a magnetic composite layer is obtained.

[Comparative Example 1]
The same as Example 1 except that the magnetic powder of the black opaque layer of the first member A is 40%.
[Comparative Example 2]
The second member B is the same as the second embodiment except that the thickness of the second member B is 40 μm.

[Comparative Example 3]
Example 5 is the same as Example 5 except that the thickness of the black opaque layer of the first member A is 40 μm and the thickness of the black opaque layer of the second member B is 90 μm.

[Comparative Example 4]
The first member A is the same as the first member A of the fifth embodiment.
Same as member B of Example 5, except that the black powdery opaque layer of the second member B has a magnetic powder filling amount of 40% and a thickness of 90 μm.
[Comparative Example 5]
The first member A is the same as the first member A of the seventh embodiment.
The second member B is the same as the second member B of Example 7 except that the thickness of the black opaque layer of the second member B is 40 μm.

[Comparative Example 6]
The filling amount of the magnetic powder of the black opaque layer of the first member A and the second member B is 40%, the thickness is 30 μm,
The same operation as in Example 1 was performed except that the thickness of the white opaque layer was 90 μm.

[Comparative Example 7]
(1) There is no black opaque layer of the first member A, the thickness of the white opaque layer is 100 μm, and after ink jet printing, a transparent adhesive is provided in the same manner as in Example 1.
(2) There is no black opaque layer of the second member B, the thickness of the white opaque layer is 100 μm, and ink jet printing is performed.
(3) Laminating White opaque layer of member A using a known dry laminator comprising unwinder / gravure coater head / dryer / heating roll / counter unwinder / nip roll / cooling roll / winder And the back surface of the white opaque layer of the member B are bonded together. The conditions at this time were: adhesive; Hydran HW-311 (manufactured by DIC Graphics), coating thickness: 2-3 μm, thermal activation temperature: 80-90 ° C., nip roll; rubber roll hardness; Shore 60 linear pressure; About 150 N / cm.
(Hereinafter, examples of the double-sided display mechanism will be shown)

1. Adhesion of window film having a magnetic composite layer on a transparent substrate The release paper of the window film having the magnetic composite layer of Example 1 was peeled off, and the interior side of a highly transparent glass plate (6 mm thick) as a transparent substrate Create a double-sided display mechanism.
2. Creation of display piece (magnet adherend type) In the same manner as the member B of Example 2, a raw piece of the display piece is created.
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

1. Adhesion of window film having a magnetic composite layer on a transparent substrate The release film of the window film having the magnetic composite layer of Example 2 was peeled off, and the interior side of a highly transmissive glass plate (4 mm thickness) as a transparent substrate Create a double-sided display mechanism.
2. Creation of Display Piece (Permanent Magnet Type) A raw piece of the display piece is produced in the same manner as the member B of Example 1 (the magnetic pole direction is transverse).
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

1. Adhesion of window film having a magnetic composite layer on a transparent substrate The release film of the window film having the magnetic composite layer of Example 3 was peeled off, and the inside of a highly transmissive glass plate (6 mm thick) as a transparent substrate Create a double-sided display mechanism.
2. Creation of display piece (magnet adherend type) The display piece was made in the same manner as member B of Example 1 except that the white opaque layer was 90 μm thick of synthetic paper 2 (PP) and screen printing was performed. Create the original fabric.
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

1. Adhesion of a window film having a magnetic composite layer on a transparent substrate. A release film of a window film having a magnetic composite layer of Example 4 is peeled off, and a chamber of a high-transmission glass plate (6 mm thickness) which is a transparent substrate. Adhere inside to create a double-sided display mechanism.
2. Preparation of display piece (magnet adherent film type). A raw piece of display piece is prepared in the same manner as the first member A of Example 2 except that the thickness of the white opaque layer is 90 μm.
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

1. Adhesion of window film having a magnetic composite layer on a transparent substrate The release film of the window film having the magnetic composite layer of Example 5 was peeled off, and the interior side of a highly transparent glass plate (6 mm thickness) as a transparent substrate Create a double-sided display mechanism.
2. Preparation of display piece (magnet adherend type) A raw piece of display piece is prepared in the same manner as the second member B of Example 2 except that the thickness of the white opaque layer is 90 μm.
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

1. Adhesion of window film having magnetic composite layer on transparent substrate The release paper of the window film having the magnetic composite layer of Example 6 was peeled off, and the interior side of the high-transmission glass plate (6 mm thickness) as the transparent substrate was peeled off Create a double-sided display mechanism.
2. Creation of Display Piece (Magnetic Substrate) A raw piece of the display piece is produced in the same manner as the member B of Example 2 except that the thickness of the white opaque layer is 100 μm.
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

1. Adhesion of window film having magnetic composite layer on transparent substrate The release paper of the window film having the magnetic composite layer of Example 7 was peeled off, and the interior side of the high-transmission glass plate (6 mm thickness) as the transparent substrate Create a double-sided display mechanism.
2. Preparation of display piece (magnet adherend type) A raw piece of display piece is prepared in the same manner as in member B of Example 2 except that the thickness of the white opaque layer is 100 μm (Example 13 and The same).
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

[Comparative Example 8]
1. Adhesion of window film having a magnetic composite layer on a transparent substrate The release film of the window film having the magnetic composite layer of Comparative Example 1 was peeled off, and the interior side of a highly transparent glass plate (6 mm thick) as a transparent substrate Create a double-sided display mechanism.
2. Creation of display piece (magnet adherent film type) A raw piece of the display piece is produced in the same manner as the member B of Example 2.
The raw material of the display piece is prepared in the same manner as the member B of Example 2.
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

[Comparative Example 9]
1. Adhesion of window film having a magnetic composite layer on a transparent substrate The release film of the window film having the magnetic composite layer of Comparative Example 2 was peeled off, and the interior side of a highly transparent glass plate (4 mm thickness) as a transparent substrate The magnetic pole direction of member A is stuck vertically to create a double-sided display mechanism.
2. Creation of display piece (permanent magnet film type) The raw material of the display piece is created in the same manner as the second member B of Example 1.
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

[Comparative Example 10]
1. Adhesion of window film having a magnetic composite layer on a transparent substrate The release film of the window film having the magnetic composite layer of Comparative Example 4 was peeled off, and the interior side of a highly transparent glass plate (6 mm thick) as a transparent substrate Create a double-sided display mechanism.
2. Preparation of display piece (magnet adherend type) A white opaque layer is made of synthetic paper 2 (PP) with a thickness of 90 μm, and screen printing is performed in the same manner as member A of Example 1, except that the display piece Create the original fabric.
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

[Comparative Example 11]
1. Adhesion of window film having magnetic composite layer on transparent substrate The release film of the window film having the magnetic composite layer of Comparative Example 5 was peeled off, and the interior side of a highly transparent glass plate (6 mm thickness) as a transparent substrate Create a double-sided display mechanism.
2. Creation of display piece (magnet adherend type) In the same manner as the display piece of Example 12, a raw piece of the display piece is produced.
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

[Comparative Example 12]
1. Adhesion of a window film having a magnetic composite layer on a transparent substrate The release film of the window film having a magnetic composite layer of Comparative Example 6 was peeled off and placed on the indoor side of a highly transparent glass plate (6 mm thick) as a transparent substrate. A double-sided display mechanism is created by sticking the magnetic pole directions of the members A and B horizontally.
2. Creation of display piece (magnet adherend type) In the same manner as the display piece of Example 13, a raw piece of the display piece is produced.
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

[Comparative Example 13]
1. Affixing a window film having a magnetic composite layer on a transparent substrate The release film of the window film having a magnetic composite layer of Comparative Example 3 is peeled off and placed on the indoor side of a highly transparent glass plate (6 mm thick) which is a transparent substrate. A double-sided display mechanism is created by sticking the magnetic pole direction of member B horizontally.
2. Creation of display piece (magnet adherend type) In the same manner as the display piece of Example 10, a raw piece of the display piece is produced.
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism.

[Comparative Example 14]
1. Adhesion of window film to transparent substrate Chamber of high transmittance glass plate (6 mm thickness) which is transparent substrate by peeling off release paper of window film of Comparative Example 7 (without black opaque layer and magnetic layer) Adhere inside to create a double-sided display mechanism.
2. Creation of display piece (magnet adherend type) In the same manner as the display piece of Example 13, a raw piece of the display piece is produced.
3. Adhesion of display piece The raw material of the display piece is cut into A4 size and magnetically attached to a double-sided display mechanism (because it is not a window film having a magnetic composite layer, it cannot be magnetically attached).

Next, a performance test evaluation method will be described.
1. Test method for transmission shadow prevention effect A test sample is installed vertically by providing a 600 x 600 mm opening in the partition walls of the test chamber and the corridor, and irradiated at right angles to the test surface with a three-wavelength fluorescent lamp from the indoor side. Then, the illuminance of the test surface is set to 1500 Lux, and the presence / absence and degree of the transmission shadow (transmission image) is visually observed from the corridor side having the illuminance of 150 Lux, and evaluated in four stages. In the test on the opposite side, the test sample is inverted and tested in the same manner.
[Evaluation] ◎: Excellent (transparent shadow / transparent image is not recognized), ○: Good (almost not recognized), Δ: Slightly inferior (slightly recognized), X: Inferior (recognized)

2. Magnetic adsorption force measuring method 2-1, vertical magnetic adsorption force A non-measurement surface is formed by using a double-sided tape 1002 on the surface of a smooth plastic plate 1001 in which a square test sample 1003 having a side of about 50 mm is fixed horizontally. A measurement jig in which a non-measurement surface is attached to a measurement surface using a double-faced tape 1002 on a back surface of a test sample 1004 on a square plastic plate 1005 having a hook of 40 mm on one side with a hook at the center of the back surface. The force required for magnetically attracting and separating in the vertical direction is measured by hooking the spring balance 1006 on the back of the plastic plate 1005 to calculate the perpendicular magnetic attracting force (g / cm ² ). (See Figure 13)

  When measuring the magnetic attractive force between the first member A and the second member B, the test sample 1003: the first member A and the test sample 1004: the second member B in FIG. In the case of measuring the magnetic attraction force between them, 1003: second member B, 1004: display piece.

2-2, Tensile Shear Tensile Magnetic Adsorption Force A square test sample 1007 having a side of about 60 mm is attached to the upper surface of a smooth plastic plate 1001 using a double-sided tape 1002. On the other hand, another test sample 1008 is attached to a square plastic plate 1009 having a hook at the center of the side surface and having a side of 50 mm using a double-sided tape 1002. Then, the force required for magnetically attracting both 1007 and 1008 and pulling them apart in the horizontal direction is measured by hooking a spring balance on the hook of the side surface of the plastic plate 1009 to calculate the tensile shear magnetic attracting force (g / cm ² ). (See FIG. 14).

  When measuring the shear tensile magnetic attractive force between the first member A and the second member B, the test sample 1007: the first member A and the test sample 1008: the second member B in FIG. When measuring the tensile shear magnetic attractive force between the display pieces, the test sample 1007 is the second member B, and the test sample 1008 is the display piece.

3. Multiple sticking test method (multiple sticking limit number)
A test piece of display piece cut to A4 size is attached by magnetic adsorption to the surface of a window film having a magnetic composite layer attached to one side of a B4 size transparent substrate held vertically, and further tested. The pieces are stacked one by one and magnetically attached, and the number of sheets before the one that causes the drop-off is obtained to obtain the maximum number of pieces that can be attached to the display substrate.

Next, test results will be described.
Each test was carried out for each example and comparative example, and the results were summarized in a table. Table 1 shows the specification and performance of the examples regarding the window film having the magnetic composite layer, and Table 2 shows the specification and performance of the comparative example regarding the window film having the magnetic composite layer.
Table 3 shows the specifications and performance of the examples of the double-sided display mechanism using the window film having the magnetic composite layer, and Table 4 shows the specifications of the comparative example of the double-sided display mechanism using the window film having the magnetic composite layer. Show performance.

1. Magnetic attractive force 1-1 Magnetic attractive force between first member A and second member B of window film having magnetic composite layer 1-1-1 perpendicular magnetic attractive force (1) First member A and second Even if the magnetic film of member B is replaced with a soft magnetic film (adhered magnet) and a hard magnetic film (magnet), the magnetic attractive force obtained does not change (Examples 1 and 2). For this reason, for the convenience of handling the member B, the second member B is made of a soft magnetic film that can be easily stacked without generating a magnetic flux, or the removed second member B is hardened to be magnetically attached to another place. Whether to use a magnetic film or not depends on the application.
(2) When either one of the filling amount and thickness of the magnetic powder of the first member A and the second member B is less than a specific value, the magnetic attractive force obtained by the influence becomes weak (Examples 1 to 2). Comparative Example 1-2 for Example 2, Comparative Example 3-4 for Example 5, and Comparative Example 5 for Example 7.
(3) The perpendicular magnetic attractive force when the first member A and the second member B are hard magnetic films (magnets) is the magnetic attractive force even if the magnetic pole direction (vertical or horizontal) of multipolar magnetization changes. (Examples 4 and 5, Examples 6 and 7).
(4) Naturally, the magnetic attractive force obtained when the filling amount of the magnetic powder and the thickness of the magnetic layer are less than the specific values are reduced, and both the magnetic films of the first member A and the second member B are If the specific value is not satisfied, the magnetic attractive force is inferior (Comparative Example 6). Further, when there is no magnetic layer, naturally no magnetic attractive force can be obtained (Comparative Example 7).

1-1-2 Shear tensile magnetic attractive force (1) Shear tension in the magnetic pole direction between a magnet film subjected to multipolar magnetization, a soft magnetic film (magnet adherend), and magnet films subjected to multipolar magnetization The magnetic attractive force depends on the coefficient of static friction of the surface where the magnetic film (non-magnetized product) and the adherend are in contact, but about 40 to 50% of the perpendicular magnetic attractive force is the shear tensile magnetic attractive force. (Examples 1-4, 6).
(2) The magnetic tension direction of multipolar magnetization between the same poles is the vertical direction (vertical), and the vertical direction (horizontal) is perpendicular to each other and the shear tensile direction is vertical (vertical). It can be seen that an excellent value substantially equal to the perpendicular magnetic attractive force is exhibited (Examples 5 and 7, Comparative Examples 3 to 4). This means that the shear tensile magnetic attractive force in the direction perpendicular to the magnetic pole direction exhibits a value substantially equal to the perpendicular magnetic attractive force, which is advantageous when a relatively heavy object is attached to the member B. .
(3) Although the same tendency is shown also about Comparative Examples 1-6, since the magnetic powder filling amount and thickness of a black type opaque layer have deviated from the specific value, the magnetic attraction force obtained is inferior.

  From the results of 1-1-1 and 1-1-2 above, it can be seen that the magnetic powder filling amount and thickness of the black magnetic layer are preferably within a specific value. That is, all the examples within the specific value are practically excellent, but the comparative example that deviates from the specific value exhibits a result that is not practical.

1-2 Multiple adhesive properties between the second member B of the window film having the magnetic composite layer of the double-sided display mechanism and the display piece (1) The filling amount and thickness of the magnetic powder of the magnetic layer of each magnetic display piece are Since it is the same in the examples and the comparative examples, the magnetic attractive force obtained depends mainly on the member of the window film having the magnetic composite layer, in particular, the magnetic and magnetization type of the part second material B. That is, when the indoor side surface of the second member B of the window film having the magnetic composite layer is a single-side magnetized back leakage magnetic flux, the magnetic flux density is relatively low. Relatively little (Example 8).
(2) When the magnetic layer of the display piece is hard magnetic (magnet) and the number of poles of multipolar magnetization is the same, the number of display pieces that can be attached in multiple layers is excellent (Example 9).
(3) Since the magnetic layer of the member B is hard magnetic (magnet) and is relatively thick and double-sided multipolar magnetization, a high magnetic flux density is obtained, and the number of display pieces that can be attached in multiple layers is good (Example 10). ).
(4) When the first member A and the second member B have the same magnetic pole direction and the same distance between the poles, the leakage flux on the back surface is excellent, so the number of display pieces that can be attached in multiple layers is also excellent. (Examples 11 and 12).
(5) When the first member A is single-sided magnetized and the second member B is double-sided magnetized with a relatively large thickness between the same pole direction as the first member A, the surface leakage magnetic flux of the second member B And the number of multiple pieces of display pieces attached is particularly excellent (Examples 13 and 14).
(6) The double-sided display mechanism using the window film having the magnetic composite layer in which the magnetic powder filling amount and the thickness of the black opaque layer deviate from a specific amount have performances that cannot be practically used (Comparative Example 8). ~ 14).

2. Transmission shadow prevention effect. The amount of magnetic powder filling and thickness of the black opaque layer of the first member A and the second member B of the window film having the magnetic composite layer greatly deviates from the specified amount. The prevention effect is inferior, and those having no black opaque layer do not have a transmission shadow prevention effect (Comparative Examples 6 to 7, 13 to 14). That is, if the amount and thickness of the magnetic powder satisfying the necessary magnetic attractive force of the first member A and the second member B of the window film of the present invention are sufficient to prevent transmission shadows. In addition, the white opaque layer also affects the transmission shadow prevention effect, but it can be seen that the transmission shadow prevention effect is sufficient if the thickness is within a specific range (a level that masks the black color of the black opaque layer) (Example 1). ~ 7).

3. Conclusion As can be seen from the examples and comparative examples, the magnetic powder loading and thickness of the black opaque layer, and the magnetic adsorption force that is practically necessary if the thickness of the white opaque layer is within a specific value range, A transmission shadow prevention effect is obtained. On the other hand, all the comparative examples which deviate from the specific range give unpractical results.

The window film having a magnetic composite layer and the double-sided display mechanism of the present invention are used for a large glass window on the road surface side of a store because a printed image on one side of the window film having a magnetic composite layer does not cause a transmission shadow on the opposite side. It is suitable for such as.
Thus, the second member on the indoor side can be easily attached / detached by the magnetic attractive force, and the magnetic display piece can be easily attached / detached to / from the entire surface by the magnetic attractive force. Therefore, it is possible to change the display piece accordingly, which is useful as a double-sided display mechanism.

A: a first member on the transparent substrate side which is a basic configuration of a window film having a magnetic composite layer of the present invention A1: a first member A2 which is an example of a window film having a magnetic composite layer of the present invention: the present invention 1st member B which is another example of the window film which has a magnetic composite layer of this: The indoor 2nd member B1 which is the basic composition of the window film which has a magnetic composite layer of this invention The magnetic composite of this invention Second member B2 to B4 which is an example of a window film having a layer: another second member W of a window film having a magnetic composite layer of the present invention W: window film W1: having a magnetic composite layer of the present invention Window films W2 to W4 having the magnetic composite layer of the present invention: Window films W10, W11, W31, W41, W51 having other magnetic composite layers of the present invention: W, W1, W3, W4 W5: window film, except for the each of the release paper

C1: Soft magnetic (magnet adherend type) display piece of the present invention with a decorative layer on the surface C2: Hard magnetic (magnet type) display piece of the present invention with a decorative layer on the surface T: Transparent substrate S: Basic structure of the double-sided display mechanism of the present invention S1: Double-sided display mechanism of the present invention S2 to S5: Other double-sided display mechanism of the present invention

M1: black opaque layer M2: black opaque layer 11: black opaque layer 12 which is a soft magnetic body (magnet adherend): a hard magnetic body (permanent magnet) subjected to single-sided multipolar magnetization Black-brown opaque layer 121: black-brown opaque layer 122 using a hard magnetic body (permanent magnet) subjected to single-sided multipole magnetization in the longitudinal direction: black-brown opaque layer 122: hard magnetic body (permanent magnet) subjected to single-sided multipole magnetization in the lateral direction Black-brown opaque layer 13: Hard magnetic material (permanent magnet) subjected to double-sided multipole magnetization Black-brown opaque layer 131: Hard magnetic material (permanent magnet) subjected to double-sided multipole magnetization in the vertical direction Black-brown opaque layer 132: black-brown opaque layer 1a: black opaque layer 1b: black opaque layer 1c: black opaque layer 1d using a hard magnetic material (permanent magnet) subjected to double-sided multipolar magnetization in the lateral direction: Black-brown opaque layer 1e: Black-brown opaque layer 2: White opaque Layer 3: Printing ink layer 4: Transparent adhesive (pressure sensitive adhesive) Layer 5: Release paper 7: Decoration layer 8: Main magnetic flux 9: Magnet adherend film 10: Same polarity as window film having magnetic composite layer Between magnet films
N: N pole of magnet film
S: S pole of magnet film

1001: smooth plastic plate 1002: double-sided adhesive tape 1003: test sample 1004: test sample 1005: smooth plastic plate provided with a hook at the center 1006: spring balance 1007: test sample 1008: test sample 1009: hook at the center of the side Smooth plastic plate provided

Claims (10)

  A white opaque layer printed on the surface can be laminated or printed on one surface of the first black opaque layer mainly composed of a black ferromagnetic powder and an organic polymer elastomer binder. The first composite film that is printed after laminating the first white opaque layer, or the white that can be formed or printed on the surface by coating the first black opaque layer on one side of the white opaque layer printed on the surface A first composite film printed after the first black opaque layer is formed by coating on one side of the system opaque layer or a first member provided with a transparent adhesive layer with a release paper on the printed surface of the first multilayer film; The surface was printed on one side of the first black opaque layer and the second black opaque layer capable of being magnetically adsorbed mainly composed of a black ferromagnetic powder and a binder which is an organic polymer elastomer. Laminate a second white opaque layer The second composite film that is printed after laminating the second opaque layer that can be printed on the surface, or the second black opaque layer can be formed on one side of the second white opaque layer that has been printed on the surface, or printed on the surface. A second member which is a second composite film printed after the second black opaque layer is formed by coating on one side of the second white opaque layer is formed on the surfaces of the first black opaque layer and the second black opaque layer. It is a window film having a magnetic composite layer formed by adhering together and adhering with magnetic attraction, and by this configuration, visible light incident on the surface of both sides is reflected by the first or second white opaque layer, Further, the transmitted visible light is absorbed by the first black opaque layer and the second black opaque layer, so that no transmissive printing shadow is generated on the back surface side, and the first member and the second member are pasted with a magnetic adsorption force. By wearing Window film having a magnetic composite layer, characterized in that the second member is readily replaceable Te.   The black ferromagnetic powder of the black opaque layer of the first member is used as a spinel ferrite powder, which is a soft magnetic material having a high magnetic permeability and a low coercive force, as a ferromagnetic powder, an organic polymer elastomer, and a processing aid. The first composite film in which the filling amount of the ferromagnetic powder with respect to the total amount of the composition is 55 to 65% by volume and the thickness is 50 to 180 μm, and the thickness of the white opaque layer is 50 to 150 μm is the first member. And the black ferromagnetic powder of the black opaque layer of the second member as a magnetoplumbite type ferrite powder, which is a hard magnetic material with high magnetic permeability and high coercive force, ferromagnetic powder, organic polymer elastomer, A permanent magnet film with multi-pole magnetization on one or both sides of a ferromagnetic powder filling amount of 55 to 65% by volume and a thickness of 60 to 250 μm with respect to the total amount of the composition comprising the processing aid. Window film having a magnetic composite layer according to claim 1, characterized in that the second composite film and the thickness of the white opaque layer is 50~150μm is a second member.   The black ferromagnetic powder of the black opaque layer of the first member is used as a magnetoplumbite type ferrite powder, which is a hard magnetic material with high permeability and high coercive force, and is used as ferromagnetic powder, organic polymer elastomer, processing aid. A permanent magnet film with multi-pole magnetization on one or both sides with a filling amount of ferromagnetic powder with respect to the total amount of the composition composed of 55 to 65% by volume and a thickness of 60 to 250 μm, and the thickness of the white opaque layer The first composite film having a thickness of 50 to 150 μm is used as the first member, and the black ferromagnetic powder of the black opaque layer of the second member is a spinel type ferrite that is a soft magnetic material having a high magnetic permeability and a low coercive force. As a powder, a film with a thickness of 50 to 180 μm and a filling amount of the ferromagnetic powder with respect to the total amount of the composition consisting of the ferromagnetic powder, the organic polymer elastomer, and the processing aid is 55 to 65 vol%, Window film having a magnetic composite layer according to claim 1, characterized in that the second composite film and the thickness of the color-pale opaque layer and 50~150μm is a second member.   The black ferromagnetic powder of the first black opaque layer of the first member is used as a magnetoplumbite type ferrite powder, which is a hard magnetic material having a high magnetic permeability and a high coercive force. A white-colored opaque layer comprising a permanent magnet film with multi-pole magnetization applied to one or both sides of 55 to 65% by volume of a ferromagnetic powder with respect to the total amount of the composition comprising a processing aid and a thickness of 60 to 250 μm The first composite film having a thickness of 50 to 150 μm is used as the first member, and the black ferromagnetic powder of the second black opaque layer of the second member is a hard magnetic material with high permeability and high coercive force. As the magnetoplumbite type ferrite powder, the filling amount of the ferromagnetic powder with respect to the total amount of the composition comprising the ferromagnetic powder, the organic polymer elastomer and the processing aid is 55 to 65% by volume, and the thickness is 60 to 25%. A permanent magnet film having multipolar magnetization applied to one or both surfaces of the first member of 0 μm and a permanent magnet film having multipolar magnetization applied to one or both surfaces between the same poles, and the thickness of the white opaque layer being 50 The window film having a magnetic composite layer according to claim 1, wherein the second member is a second composite film having a thickness of ˜150 μm.   The spinel-type ferrite powder according to any one of claims 2 and 3 is a magnetite powder, and the magnetoplumbite-type ferrite powder is a strontium ferrite powder. A window film having the magnetic composite layer described in 1.   The window film having the magnetic composite layer according to any one of claims 1 to 5 is adhered to the indoor side of the transparent substrate with a transparent adhesive layer, and the second member can be easily removed. Features a double-sided display mechanism.   A window film having the magnetic composite layer according to claim 2 or 4 is adhered to the indoor side of a transparent substrate with a transparent adhesive layer, and a spinel-type ferrite powder which is a soft magnetic material on the surface of the second member, From a soft magnetic film having a thickness of 55 to 65% by volume of spinel ferrite powder and a thickness of 60 to 180 μm and a decorative layer having a thickness of 50 to 150 μm with respect to the total amount of the composition comprising the organic polymer elastomer and processing aid A double-sided display mechanism characterized in that one or more of the soft magnetic display pieces can be attached and detached with a magnetic attraction force.   A window film having the magnetic composite layer according to claim 3 or 4 is adhered to the indoor side of a transparent substrate such as a door glass or a window glass by a transparent adhesive layer, and a hard magnetic material is applied to the surface of the second member. The magnetoplumbite type ferrite powder is 55 to 65% by volume with respect to the total amount of the composition comprising the magnetoplumbite type ferrite powder, the organic polymer elastomer, and the processing aid, and the thickness is 70 to 200 μm. The magnetic pole direction of the hard magnetic display piece comprising the permanent magnet film with multipolar magnetization on one or both sides between the member and the first member and the same polarity and the decorative layer having a thickness of 50 to 150 μm is set to the second member or the first member. A double-sided display mechanism characterized in that it can be attached and detached over one or more sheets with a magnetic attraction force in accordance with the magnetic pole direction.   The double-sided display mechanism according to claim 7, wherein the spinel ferrite powder is magnetite powder.   The double-sided display mechanism according to claim 8, wherein the magnetoplumbite type ferrite powder is strontium ferrite powder.

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