Interior building materials

Abstract

The present invention intends to provide a technique by which, in an interior building material which is represented by a gypsum board and to which a magnet does not attach, the surface of such an interior building material can be modified so that a magnet can attach to the surface by simple means that can be put into practical use, a wall face and the like for which a stopper with a magnet, which is a substitute for a thumbtack, and a magnet sheet are usable can thereby be formed, and an interior building material which has realized favorable construction efficiency such that the interior building material can be easily cut with a cutter knife or the like can be made, and this object is realized by providing an interior building material having a plurality of sheet-like magnetic materials fixed to at least a portion of a surface or back surface of a plate-like base material to which a magnet does not attach, wherein adjacent magnetic materials are disposed in such a way as to have a portion where the adjacent magnetic materials are in contact with each other, or adjacent magnetic materials are disposed through a gap having a narrow portion.

1 . An interior building material comprising a plurality of sheet-like magnetic materials fixed to at least a portion of a surface or back surface of a plate-like base material to which a magnet does not attach, wherein adjacent magnetic materials are disposed in such a way as to have a portion where the adjacent magnetic materials are in contact with each other, or adjacent magnetic materials are disposed through a gap having a narrow portion. 
     
     
         2 . The interior building material according to  claim 1 , wherein the adjacent magnetic materials are disposed in such a way as to be in contact with each other and the plurality of sheet-like magnetic materials are fixed in a state of being arranged without a gap. 
     
     
         3 . The interior building material according to  claim 1 , wherein the narrow portion of the gap is within a range of 0.05 to 5.0 mm. 
     
     
         4 . The interior building material according to  claim 1 , wherein the narrow portion of the gap is within a range of 0.10 to 1.0 mm. 
     
     
         5 . The interior building material according to  claim 1 , wherein the plurality of sheet-like magnetic materials have the same shape, and the shape is any one of shapes selected from the group consisting of a square, a rectangle, a trapezoid, a triangle, a circle, and an ellipse. 
     
     
         6 . The interior building material according to  claim 5 , wherein four sides of the square, two sides of the rectangle, at least one side of the trapezoid or the triangle, a diameter of the circle, or at least one of a major axis and a minor axis of the ellipse is 10 cm to 35 cm. 
     
     
         7 . The interior building material according to  claim 1 , wherein the gap is formed by only the narrow portion, and the narrow portion is linear. 
     
     
         8 . The interior building material according to  claim 1 , wherein at least one of the plurality of sheet-like magnetic materials is a sheet-like magnetic material having a through hole. 
     
     
         9 . The interior building material according to  claim 1 , wherein at least one of the plurality of sheet-like magnetic materials has a chamfered portion at an outer circumference thereof. 
     
     
         10 . The interior building material according to  claim 1 , wherein when the interior building material is stood in such a way as to be vertical, and one sheet of A4 plain paper is held at a portion where the sheet-like magnetic materials are disposed with one disk-like magnet having a diameter of a magnet portion of 17 mmϕ and having a force of attraction of 3.5 N to an iron sheet having a thickness of 1 mm, the portion where the sheet-like magnetic materials are disposed has force of attraction by which the plain paper does not fall. 
     
     
         11 . The interior building material according to  claim 1 , having a structure in which the base material is a plate-like member made of gypsum, and, further, a paper sheet is pasted on the plurality of disposed sheet-like magnetic materials. 
     
     
         12 . The interior building material according to  claim 1 , wherein the sheet-like magnetic materials have a thickness of 0.1 to 1.0 mm. 
     
     
         13 . The interior building material according to  claim 1 , wherein the sheet-like magnetic materials have a thickness of 0.2 to 0.8 mm. 
     
     
         14 . The interior building material according to  claim 1 , wherein any one of the plurality of sheet-like magnetic materials is an iron sheet or a steel sheet having rust-proofing performed on both faces or one face thereof. 
     
     
         15 . The interior building material according to  claim 1 , having a thickness of 9.5 to 10.0 mm. 
     
     
         16 . The interior building material according to  claim 1 , having a thickness of 12.5 to 13.0 mm.