Ferrite powder, resin composition, and molded article

Patent metadata

Field	Value
Publication number	US-2019135653-A1
Application number	US-201716095710-A
Country	US
Kind code	A1
Filing date	Apr 11, 2017
Priority date	May 6, 2016
Publication date	May 9, 2019
Grant date	—

Abstract

Ferrite powder of the present invention is ferrite powder detectable with a metal detector, comprising: soft ferrite particles containing Mn of 3.5 mass % or more and 20.0 mass % or less and Fe of 50.0 mass % or more and 70.0 mass % or less. It is preferable that a volume average particle diameter of the particles constituting the ferrite powder is 0.1 μm or more and 100 μm or less. It is preferable that magnetization by a VSM measurement when magnetic field of 5 K·1000/4πA/m is applied is 85 A·m2/kg or more and 98 A·m2/kg or less.

First claim

1 . Ferrite powder detectable with a metal detector, comprising:
soft ferrite particles containing Mn of 3.5 mass % or more and 20.0 mass % or less and Fe of 50.0 mass % or more and 70.0 mass % or less.

2 . The ferrite powder according to claim 1 , wherein a volume average particle diameter of the particles constituting the ferrite powder is 0.1 μm or more and 100 μm or less.

3 . The ferrite powder according to claim 1 , wherein magnetization by a VSM measurement when a magnetic field of 5 K·1000/4πA/m is applied is 85 A·m 2 /kg or more and 98 A·m 2 /kg or less.

4 . A resin composition, comprising:
the ferrite powder according to claim 1 ; and a resin material.

5 . The resin composition according to claim 4 , wherein the ferrite powder is dispersedly present in the resin material.

6 . The resin composition according to claim 4 , wherein a content rate of the ferrite powder in the resin composition is 5.0 mass % or more and 90 mass % or less.

7 . The resin composition according to claim 4 , wherein the resin material includes one kind or more kinds selected from the group consisting of polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol (PVA), a fluorine based resin, silicone rubber, butadiene rubber, a thermoplastic elastomer, an epoxy resin and a silicone resin.

8 . A molded body having a portion formed by using the resin composition according to claim 4 .

9 . The molded body according to claim 8 , wherein a content rate of the ferrite powder is 2.0 mass % or more and 20 mass % or less.

10 . The molded body according to claim 8 , wherein the molded body is used in a field for manufacturing, processing and packaging of a food.

11 . The molded body according to claim 10 , wherein the molded body is used for a part or all of a cooking utensil, a food preparation tool or a food packaging member.

12 . The molded body according to claim 8 , wherein the molded body contains the ferrite powder in a region within 1.0 mm in a thickness direction from a surface thereof.

Assignees

• Powdertech Co Ltd

Inventors

• Aga Koji
• Igarashi Tetsuya

Classifications

• C04B2235/424

  Carbon black · CPC title

• C04B2235/6567

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• C04B2235/3263

  Mn3O4 · CPC title

• C04B2235/658

  Atmosphere during thermal treatment · CPC title

• C04B35/2658

  Other ferrites containing manganese or zinc, e.g. Mn-Zn ferrites · CPC title