Abstract: A method for producing a magnetic sheet wherein a magnetic sheet composition onto a substrate. The magnetic sheet composition contains: a binder; magnetic powder; and a curing agent, wherein the binder contains a thermosetting organic resin, and the curing agent contains a sulfonium borate complex expressed by General Formula 1: where R1 is an aralkyl group, R2 is a lower alkyl group, X is a halogen atom, and n is an integer of 0 to 3.

Abstract: Rubber-cord complex 9 having improved wet heat adhesive property between rubber and cord. The rubber-cord complex includes cord 10 comprising drawn plated wire 17 prepared by providing brass plated layer 16E on surface of element wire 15 and drawing the resulting plated wire and rubber 12 vulcanized and bonded to cord 10. The rubber-cord complex 9 has adhesion reaction layer 25 (formed by cross-linking sulfur and copper) between rubber 12 and brass plated layer 16E. Adhesion reaction layer 25 has average thickness of 50-1,000 nm. Interface S between adhesion reaction layer 25 and the rubber has a fractal dimension of 1.001-1.300 in a wet heat deterioration state after being subjected to vulcanization to bond rubber 12 thereto and being held at a temperature of 50-100° C. and a humidity of 60-100% for one hour to 20 days.

Abstract: A rubber-cord complex having an improved wet heat adhesive property between a rubber and a cord comprising a drawn plated wire, and including a metal cord comprising a drawn plated wire prepared by providing a brass plated layer on the surface of an element wire and drawing the resulting plated wire, and a rubber vulcanized and bonded to the cord, wherein in a wet heat deterioration state of the drawn plated wire after being subjected to the vulcanization to bond the rubber thereto and further held under an atmosphere having a temperature of 50 to 100° C. and a humidity of 60 to 100% for one hour to 20 days, the average grain size of crystal grains present in the brass plated layer is not more than 50 nm, and the grain boundary of the crystal grains has a fractal dimension of 1.001 to 1.500.

Abstract: A magnetic sheet, which contains: a magnetic layer including a magnetic powder and a resin composition containing the magnetic powder therein; and a convex-concave forming layer, in which the convex-concave forming layer has Bekk smoothness of 70 sec/mL or less. A method for producing a magnetic sheet, which contains: adding a magnetic powder to a resin composition to prepare a magnetic composition, and giving the magnetic composition a shape to form a magnetic layer; and placing and stacking a convex-concave forming layer and a pattern transferring material on a surface of the magnetic layer in this order, and hot pressing the stacked layers so as to bond the convex-concave forming layer with the magnetic layer to form a laminate, as well as to transfer a surface configuration of the pattern transferring material to a surface of the laminate of the convex-concave forming layer and the magnetic layer.

Abstract: The present invention is to impart, to a sheet-like soft magnetic material, a configuration in which sheet thickness change is suppressed and in which fluctuation in magnetic permeability is small even under a high-temperature or a high-temperature, high-humidity environment, even when a plurality of thin curable soft magnetic sheets produced by a coating method are laminated. The sheet-like soft magnetic material is formed from a soft magnetic composition which is formed by mixing at least a flat soft magnetic powder, an acrylic rubber, an epoxy resin, a curing agent for the epoxy resin, and a solvent. The flat soft magnetic powder is arranged in an in-plane direction of the sheet-like soft magnetic material. An acrylic rubber having a glycidyl group is used for the acrylic rubber. The weight ratio of the flat soft magnetic powder with respect to the total amount of the acrylic rubber, the epoxy resin, and the curing agent for the epoxy resin is 3.7 to 5.8.

Abstract: This invention provides an antenna apparatus (60) for use in a non-contact type IC card into and from which data can be written and read by electronic apparatuses having a communication function, by virtue of inductive coupling. The antenna apparatus comprises a loop coil (61) and a magnetic member (62). The loop coil is produced by winding a conductive wire in a plane and configured to perform the inductive coupling. The magnetic member covers one region (61a) of the loop coil, provided at one side, from one surface of the loop coil, passes through the loop coil, and covers the other region (61b) of the loop coil, provided at the other side, from the other surface of the loop coil. The entire region of the loop coil is thus covered.

Abstract: To provide a magnetic sheet composition, which contains: a binder; magnetic powder; and a curing agent, wherein the binder contains a thermosetting organic resin, and the curing agent contains a sulfonium borate complex expressed by General Formula 1: where R1 is an aralkyl group, R2 is a lower alkyl group, X is a halogen atom, and n is an integer of 0 to 3.

Abstract: A magnetic sheet containing a binder, a magnetic powder, and a fire retardant, wherein the fire retardant contains at least one of a silicon atom-containing melamine cyanurate and a carboxylic acid amide-containing melamine cyanurate.

Abstract: The present invention provides an antenna apparatus (60) for use in a non-contact type IC card into and from which data can be written and read by an electronic apparatus having a communication function, by virtue of inductive coupling. The antenna apparatus includes a loop coil (61) and a magnetic member (62). The loop coil (61) is produced by winding a conductive wire in a plane and configured to perform the inductive coupling with the electronic apparatus. The magnetic member (62) covers one region (61a) of the loop coil, provided at one side, from one surface of the loop coil, passes through the loop coil, and covers the other region (61b) of the loop coil, provided at the other side, from the other surface of the loop coil.

Abstract: The present invention provides a magnetic sheet with improved resistance to folding while maintaining good magnetic characteristics and reliability; a method for producing the magnetic sheet; an antenna; and a portable communication device. A magnetic sheet of the present invention includes a flat magnetic powder, and a resin binder capable of dissolving in a solvent, wherein the magnetic sheet has a gradient of the content ratio of the magnetic powder to the resin binder in a thickness direction thereof, wherein, in use, the magnetic sheet is folded so that, of the front and back surfaces thereof, one surface whose magnetic powder content is lower than that of the other is folded inward, and wherein the difference in glossiness measured at a light-incident angle of 60° between the front and back surfaces is 9.4 or more.

Abstract: In manufacturing a magnetic sheet, the magnetic sheet is formed by applying on a prescribed substrate a magnetic paint made from a mixture of at least flat soft magnetic powder and polymeric binder dissolved in a solvent and drying the magnetic paint. Subsequently, the magnetic paint is further coated on the magnetic sheet formed by drying the magnetic paint and is dried. Thus, an extremely high quality magnetic sheet is made with high productivity.

Abstract: The present invention is to impart, to a sheet-like soft magnetic material, a configuration in which sheet thickness change is suppressed and in which fluctuation in magnetic permeability is small even under a high-temperature or a high-temperature, high-humidity environment, even when a plurality of thin curable soft magnetic sheets produced by a coating method are laminated. The sheet-like soft magnetic material is formed from a soft magnetic composition which is formed by mixing at least a flat soft magnetic powder, an acrylic rubber, an epoxy resin, a curing agent for the epoxy resin, and a solvent. The flat soft magnetic powder is arranged in an in-plane direction of the sheet-like soft magnetic material. An acrylic rubber having a glycidyl group is used for the acrylic rubber. The weight ratio of the flat soft magnetic powder with respect to the total amount of the acrylic rubber, the epoxy resin, and the curing agent for the epoxy resin is 3.7 to 5.8.

Abstract: A magnetic sheet, which contains: a magnetic layer including a magnetic powder and a resin composition containing the magnetic powder therein; and a convex-concave forming layer, in which the convex-concave forming layer has Bekk smoothness of 70 sec/mL or less. A method for producing a magnetic sheet, which contains: adding a magnetic powder to a resin composition to prepare a magnetic composition, and giving the magnetic composition a shape to form a magnetic layer; and placing and stacking a convex-concave forming layer and a pattern transferring material on a surface of the magnetic layer in this order, and hot pressing the stacked layers so as to bond the convex-concave forming layer with the magnetic layer to form a laminate, as well as to transfer a surface configuration of the pattern transferring material to a surface of the laminate of the convex-concave forming layer and the magnetic layer.

Abstract: A rubber-cord complex having an improved wet heat adhesive property between a rubber and a cord comprising a drawn plated wire, and including a metal cord comprising a drawn plated wire prepared by providing a brass plated layer on the surface of an element wire and drawing the resulting plated wire, and a rubber vulcanized and bonded to the cord, wherein in a wet heat deterioration state of the drawn plated wire after being subjected to the vulcanization to bond the rubber thereto and further held under an atmosphere having a temperature of 50 to 100° C. and a humidity of 60 to 100% for one hour to 20 days, the average grain size of crystal grains present in the brass plated layer is not more than 50 nm, and the grain boundary of the crystal grains has a fractal dimension of 1.001 to 1.500.

Abstract: This invention provides an antenna apparatus (60) for use in a non-contact type IC card into and from which data can be written and read by electronic apparatuses having a communication function, by virtue of inductive coupling. The antenna apparatus comprises a loop coil (61) and a magnetic member (62). The loop coil is produced by winding a conductive wire in a plane and configured to perform the inductive coupling. The magnetic member covers one region (61a) of the loop coil, provided at one side, from one surface of the loop coil, passes through the loop coil, and covers the other region (61b) of the loop coil, provided at the other side, from the other surface of the loop coil. The entire region of the loop coil is thus covered.

Abstract: A method for producing a laminated soft-magnetic sheet is provided by laminating thin soft-magnetic sheets produced by an application method. A change in sheet thickness can be suppressed and variations in the magnetic permeability are small.

Abstract: This invention provides an antenna apparatus (60) for use in a non-contact type IC card into and from which data can be written and read by electronic apparatuses having a communication function, by virtue of inductive coupling. The antenna apparatus comprises a loop coil (61) and a magnetic member (62). The loop coil is produced by winding a conductive wire in a plane and configured to perform the inductive coupling. The magnetic member covers one region (61a) of the loop coil, provided at one side, from one surface of the loop coil, passes through the loop coil, and covers the other region (61b) of the loop coil, provided at the other side, from the other surface of the loop coil. The entire region of the loop coil is thus covered.

Abstract: A rubber-cord complex 9 having an improved wet heat adhesive property between a rubber and a cord comprising a drawn plated wire, and including a cord 10 comprising a drawn plated wire 17 prepared by providing a brass plated layer 16E on the surface of an element wire 15 and drawing the resulting plated wire, and a rubber 12 vulcanized and bonded to the cord 10, wherein the rubber-cord complex 9 has an adhesion reaction layer 25 formed by a cross-linking reaction of sulfur and copper, between the rubber 12 and the brass plated layer 16E, and in a wet heat deterioration state after being subjected to the vulcanization to bond the rubber 12 thereto and further held under an atmosphere having a temperature of 50 to 100° C. and a humidity of 60 to 100% for one hour to 20 days, the adhesion reaction layer 25 has an average thickness of 50 to 1,000 nm, and the interface S between the adhesion reaction layer 25 and the rubber has a fractal dimension of 1.001 to 1.300.

Abstract: This invention provides an antenna apparatus (60) for use in a non-contact type IC card into and from which data can be written and read by electronic apparatuses having a communication function, by virtue of inductive coupling. The antenna apparatus comprises a loop coil (61) and a magnetic member (62). The loop coil is produced by winding a conductive wire in a plane and configured to perform the inductive coupling. The magnetic member covers one region (61a) of the loop coil, provided at one side, from one surface of the loop coil, passes through the loop coil, and covers the other region (61b) of the loop coil, provided at the other side, from the other surface of the loop coil. The entire region of the loop coil is thus covered.