JP6090984B2 - Soft magnetic sheet - Google Patents

Description

  The present invention relates to a soft magnetic sheet that allows a magnet member to be magnetically attached to a wall or the like by sticking to a smooth surface such as a wall that does not have a magnetic attachment effect.

  Conventionally, a writing surface replacement surface material for a writing board having an iron foil layer which is a soft magnetic material and having a writing surface on the surface has been proposed (Patent Document 1). The writing surface replacement surface material has a writing surface, an iron foil layer having a thickness of 50 to 100 μm provided on the lower side of the writing surface, and adhesion by an adhesive during construction provided on the lower side of the iron foil layer. A surface material for replacing the writing surface of a lightweight and sheet-like writing board having magnetic performance, characterized by having a structure comprising a flexible base material layer made of a possible material.

JP-A-7-13297

  However, the flexible base material layer of the writing surface replacement surface material described in Patent Document 1 is composed of a base material having excellent flexibility, such as flame retardant paper, as described in paragraph 0015 of the specification of this document. Therefore, when a local deformation stress is applied to the iron foil layer of the writing surface replacement surface material, it is difficult to disperse this stress, and the iron foil layer is easily bent locally to leave a mark. There is a problem that there is.

  The problem to be solved by the present invention is that even if a local deformation stress is applied to the iron foil layer or the steel foil layer, which is a soft magnetic metal foil layer, the stress is dispersed and the iron which is the soft magnetic metal foil layer. An object of the present invention is to provide a soft magnetic sheet in which a local bending trace does not remain in a foil layer or a steel foil layer.

According to the first aspect of the present invention, a surface layer is provided on the soft magnetic metal foil layer, a base fabric layer is provided below the soft magnetic metal foil layer, and the soft magnetic metal foil layer is a steel foil layer, Is made of knitted fabric, an adhesive layer is provided under the base fabric layer, the surface layer is made of either coated paper, resin film or wall decorative paper, and the thickness of the steel foil layer is 50 to 300 μm. the thickness of the fabric layer Ri 0.2~0.7mm der, the base fabric layer is a double-sided knitted fabric area, number of loops per 10cm offer soft magnetic sheet, wherein 90-100 der Rukoto To do.

  In the soft magnetic sheet according to the present invention, even if a local deformation stress is applied to the steel foil layer, which is a soft magnetic metal foil layer, the base fabric layer is elastic, so that the stress is effectively dispersed and the steel sheet is steel. There is no effect that the foil layer is not locally bent, so that no folding marks remain on the steel foil layer. Moreover, since the steel foil layer is a soft magnetic material, there is an effect that a magnet member can be magnetized.

In the soft magnetic sheet according to the present invention, since the base fabric layer is made of knitted fabric, the flexibility of the base fabric layer is high, and even when a local deformation stress is applied to the steel foil layer, the stress is more flexibly applied. Therefore, the steel foil layer, which is a soft magnetic metal foil layer, is not locally bent, and there is an effect that no trace of bending remains.

In addition , since the soft magnetic sheet according to the present invention has an adhesive layer provided under the base fabric layer, the soft magnetic sheet can be attached to a wall or the like via the adhesive layer, The soft magnetic material sheet can be quickly adhered to a wall or the like.

Further, the soft magnetic sheet according to the present invention has an effect that the surface layer is made of any one of coated paper, resin film, and wall decorative paper, and can be used for interior decoration of a building.

It is a sectional state figure of the soft magnetic material sheet (adhesion layer is omitted) concerning the present invention. The present invention is a cross-sectional state diagram of the engagement Ru soft quality magnetic sheet.

Next, a mode for carrying out the soft magnetic sheet according to the present invention will be described.
FIG. 1 is a sectional state diagram of a soft magnetic sheet 1 according to the present invention, and 2 is a surface layer. The surface layer 2 may be any of coated paper, resin film, wall decorative paper, and the like. In the case of a resin film, the surface layer 2 can be written with an aqueous marker.

A steel foil layer 3 is provided under the surface layer 2, and a base fabric layer 4 that is a knitted fabric is formed under the steel foil layer 3. The thickness of the steel foil layer 3 is preferably 50 to 300 μm. If it is less than 50 μm, the magnetizing force of the magnet member is insufficient, and if it exceeds 300 μm, the flexibility of the steel foil layer 3 is insufficient and handling becomes inconvenient. In this embodiment, an iron foil is used for the soft magnetic metal foil layer, but other soft magnetic metal foil such as SUS430 on which a magnet is magnetically attached may be used.

  The base fabric layer 4 is preferably a knitted fabric. Because it is knitted fabric, it is more flexible than ordinary paper, and there is no wrinkle or bending trace left as in knitted clothing. As a result, local bending stress is applied to the steel foil layer 3. However, the base fabric layer 4 which is adjacent to and integrated with the steel foil layer 3 disperses the stress, so that no folding marks remain on the steel foil layer 3.

  Further, the base fabric layer 4 is preferably 0.2 mm to 0.7 mm from the viewpoint of effective stress dispersion, and if it is less than 0.2 mm, the stress dispersion is insufficient, and the steel foil layer 3 may be left with a folding mark. If it exceeds 0.7 mm, the weight becomes heavy, and the workability when sticking to a wall or the like is lowered.

  When the base fabric layer 4 is a double-sided knitted fabric, the number of loops per 10 cm is preferably 90 to 100. If it is less than 90, the stress dispersion capability may be lowered, and if it exceeds 100, the flexibility is lowered. It may not be preferable. Moreover, the material of the yarn used for the knitting is preferably rayon / polyester (blend), and the thickness of the yarn is preferably 20 to 40. If it is less than 20th, it is not preferable because the strength is excessive and flexibility may be lowered, and if it is more than 40th, it is not preferable because the strength is insufficient and stress dispersion ability may be lowered.

Figure 2 is a sectional phase diagram of the engagement Ru soft quality magnetic sheet 10 to the present invention. 12 is a surface layer, and a steel foil layer 13 which is a soft magnetic metal foil layer is provided under the surface layer 12, and a base fabric layer 14 which is a knitted fabric is formed under the steel foil layer 13. ing. Under the base fabric layer 14, an adhesive layer 15 made of acrylic resin, urethane resin, or silicone resin is provided. Usually, a release paper (not shown) covering the adhesive layer 15 is further provided, and the release paper is removed immediately before the soft magnetic sheet 10 is attached to the wall or the like via the adhesive layer 15.

  Hereinafter, the soft magnetic material sheet according to the present application will be specifically described in Examples and Comparative Examples.

  Soft magnetic sheets of Examples 1 to 5 and Comparative Examples 1 to 3 were prepared according to the specifications shown in Table 1. The coated paper used for the surface layer is a commercial art paper, one side of the special art paper (trade name, manufactured by Mitsubishi Paper Industries, thickness 0.11 mm), and the steel foil is a galvanized steel sheet (trade name, manufactured by Toyo Kohan Co., Ltd.) The base fabric is a 30-thick rayon / polyester blend yarn knitted on both sides, and the number of loops per 10 cm is 90-95 in the vertical direction and 95-100 in the horizontal direction (thickness 0). Each layer was bonded with a commercially available aqueous vinyl urethane adhesive Sumikaflex 801HQ (trade name, manufactured by Sumitomo Chemical Co., Ltd.), cured at 23 ° C. for 7 days, and evaluated as follows. The base fabric of Comparative Example 3 is a knitted fabric in which a 90-thick rayon / polyester blend yarn is knitted on both sides and the number of loops per 10 cm is 250 to 260 in the longitudinal direction and 270 to 280 in the transverse direction ( Thickness 0.15 mm) was used.

[Evaluation items and methods]

[Ease of attaching horseshoe traces]
The soft magnetic sheets of Examples 1 to 5 and Comparative Examples 1 to 3 are placed on the index finger and the middle finger, and bending stress is applied so as to be strongly loaded with the thumb. After that, those with a horseshoe trace left on the soft magnetic sheet were evaluated as “X”, and those without a horseshoe trace left as “◯”.

[Flexibility]
The soft magnetic sheets of Examples 1 to 5 and Comparative Examples 1 to 3 were evaluated as ◯ when they were wound in a roll and easily wound, and X when they were repulsive and difficult to wind.

[Magnet adsorption]
Magnetic attraction force of 96 gf / cm with soft iron obtained by holding the soft magnetic sheets of Examples 1 to 5 and Comparative Examples 1 to 3 vertically and applying multipolar magnetization (3.0 mm between poles) A magnet component having a self-weight of 150 gf obtained by laminating ^two anisotropic magnet sheets (3 cm × 3 cm) on a nonmagnetic material is magnetically attached to the surface of the test body. A case where the magnet part did not fall was evaluated as “good”, and a case where the magnetic part was dropped was evaluated as “x”.

〔Comprehensive evaluation〕
All evaluation items were evaluated as ○, and other items were evaluated as ×.

〔Evaluation results〕
The evaluation results are shown in Table 2.
As shown in Table 2, the overall evaluation of Examples 1 to 5 was “good”, but the comparative example was “poor”.

DESCRIPTION OF SYMBOLS 1 Soft magnetic sheet 2 Surface layer 3 Steel foil layer 4 Base cloth layer 10 Soft magnetic sheet 12 Surface layer 13 Steel foil layer 14 Base cloth layer 15 Adhesive layer

Claims (1)

A surface layer is provided on the soft magnetic metal foil layer, a base fabric layer is provided below the soft magnetic metal foil layer, the soft magnetic metal foil layer is a steel foil layer, and the base fabric layer is made of knitted fabric. An adhesive layer is provided under the layer, the surface layer is composed of any one of coated paper, resin film, or wall decorative paper, the thickness of the steel foil layer is 50 to 300 μm, and the thickness of the base fabric layer is 0.2. ~0.7mm der is, the base fabric layer is a double-sided knitted fabric area, the soft magnetic sheet loops per 10cm is characterized by 90-100 der Rukoto.

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