Mitsui Chemicals, Inc.

Takashi Ono

Mitsunobu Yoshida

Nobuhiro Maruko

Hiroshi Watanabe

Shoji Tamai

Takashi Kuroki

Hidenobu Nogi

Tomoyuki Nakata

Kouichi Kanayama

A heat treatment was carried out in a pressurized condition on an amorphous metal ribbon containing Fe and Co as main components and being represented by the general formula: (CoFe)XY. (In the formula, X represents at least one species of element selected from Si, B, C and Ge, Y represents at least one species of element selected from Zr, Nb, Ti, Hf, Ta, W, Cr, Mo, V, Ni, P, Al, Pt, Rh, Ru, Sn, Sb, Cu, Mn and rare earth elements, c, a and b satisfy 0&#x2266;c&#x2266;1.0, 10&#x3c;a&#x2266;35 and 0&#x2266;b&#x2266;30, respectively, and a and b are represented in terms of atomic %.) By carrying out a heat treatment in a pressurized condition in the same manner on a magnetic substrate comprising an amorphous metal ribbon and a heat resistant resin or a laminate of the substrates, not only the magnetic properties but also the mechanical properties and the processability are improved. The substrates can be used in antennas, which are devices that convert an electric wave to an electric signal, rotors and stators of electric motors and so on.

Magnetic substrate, laminate of magnetic substrate and method for producing thereof

The present invention provides a magnetic core whose outer surface has been coated without handling brittle ribbon to thereby impart insulating properties and shape retention properties to the magnetic core after annealing heat treatment, and further provides an adhesive resin composition for a magnetic core, which is useful for efficiently producing the above-mentioned magnetic core without using any organic solvent and which per se is stable to heat and elapse of time. By forming a coating film having a certain thickness or more on an outer surface using a composition containing a resin of specific properties, there can be obtained a magnetic core whose outer surface has been coated without handling brittle ribbon to thereby impart insulating properties and shape retention properties to the magnetic core after annealing heat treatment. The adhesive resin composition containing particles of a resin having specific properties is useful for efficiently producing the above-mentioned excellent magnetic core without using any organic solvent, and this composition is stable to heat and elapse of time.

Magnetic core and magnetic core-use adhesive resin composition

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Sodegaura, Japan

Takashi Ono