Process for producing magnetic sheet and magnetic sheet

Abstract

In producing a magnetic sheet, a magnetic coating material prepared by mixing at least a powder composed of flat soft magnetic particles with a polymeric binder dissolved in a solvent is applied to a given base and then dried to form a magnetic sheet. The magnetic coating material is further applied to the magnetic sheet formed through drying, and the coating material applied is dried. Thus, a magnetic sheet of extremely high quality can be produced with high productivity.

Description

technical field [0001] The present invention relates to a method of manufacturing a magnetic sheet suitable for suppressing electromagnetic wave noise of an IC card, an IC mark, and the like, and a magnetic sheet manufactured by the method. Background technique [0002] In recent years, a system for individual management called so-called RFID (Radio Frequency IDentification) has been used in various industries. The RFID system transmits data to a transponder by means of wireless communication between a small contactless integrated circuit (IntergratedCircuit; hereinafter referred to as IC) device and a predetermined reader / writer (Read / Write). Technology of reading and / or writing. The small contactless integrated circuit device is a readable and / or writable memory transponder and has a communication function. Specifically, in the RFID system, according to the principle of electromagnetic induction, as the coil antenna on the reader side releases the magnetic flux, the rele...

AI Technical Summary

Problems solved by technology

[0010] In the conventional method of manufacturing a magnetic sheet, since it includes the step of peeling the magnetic sheet from the peeling PET and laminating a plurality of magnetic sheets, there is a problem of laminating a plurality of magnetic sheets in a misaligned state. , In addition, there are problems of long manufacturing process and poor productivity

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