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Plate-shaped ferrite particles for pigments with metallic luster

A metallic luster and ferrite technology, applied in the direction of iron oxide/hydroxide, iron oxide, iron compounds, etc., can solve the problems of lack of shielding ability and designability, and achieve the effect of taking design into account

Active Publication Date: 2020-09-04
POWDERTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] As mentioned above, there are no ferrite particles for pigments that have both electromagnetic wave shielding ability and designability

Method used

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  • Plate-shaped ferrite particles for pigments with metallic luster
  • Plate-shaped ferrite particles for pigments with metallic luster
  • Plate-shaped ferrite particles for pigments with metallic luster

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] (production of ink)

[0069] Weigh iron oxide, nickel oxide, zinc oxide, copper oxide to make Fe 2 o 3 49 moles of NiO, 15 moles of NiO, 30 moles of ZnO, and 6 moles of CuO. After mixing with a Henschel mixer, the mixture is granulated with a roller press, and then the calcination temperature is 1000 ° C in a rotary furnace in an atmospheric environment. pre-calcined.

[0070] The obtained calcined product was coarsely pulverized by a rod mill, and then finely pulverized by a wet bead mill to obtain a cake-like calcined product whose water content was adjusted. A dispersant is added to the cake-like calcined product, and it is dispersed with a homogenizer to make a water-based ink. Further, a binder (PVA) was added so that the moisture content relative to the aqueous ink was 2% by weight. In the above manner, a hydrophilic ink having a solid content of 80% by weight was obtained.

[0071] (Coating and peeling from the coated surface)

[0072] Coating was carried o...

Embodiment 2

[0076] Plate-shaped ferrite particles were obtained in the same manner as in Example 1 except that the solid content of the ink was 85% by weight.

Embodiment 3

[0078] Plate-shaped ferrite particles were obtained in the same manner as in Example 1 except that the solid content of the ink was 70% by weight.

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Abstract

The object of the present invention is to provide plate-shaped ferrite particles for pigments having both electromagnetic wave shielding ability and designability, a resin molded article containing the plate-shaped ferrite particles for pigments, and a housed electronic circuit using the resin molded article electromagnetic wave shielding case. In order to achieve this object, the present invention employs plate-shaped ferrite particles for pigments characterized by metallic luster, a resin molded article containing the plate-shaped ferrite particles for pigments, and a housed electronic circuit using the resin molded article Electromagnetic wave shielding shell, etc.

Description

technical field [0001] The present invention relates to plate-shaped ferrite particles for pigments having metallic luster, and more specifically, to plate-shaped ferrite particles for pigments having electromagnetic wave shielding capability and designability, and to a resin containing the plate-shaped ferrite particles for pigments A molded body, and an electromagnetic wave shielding case for accommodating an electronic circuit using the resin molded body. Background technique [0002] In recent years, with the digitalization, high performance, and miniaturization of electronic and communication equipment, electromagnetic waves generated by other equipment become noise, causing equipment to malfunction or adversely affecting the human body. Therefore, there is an increasing demand for electromagnetic wave absorbing materials or electromagnetic shielding materials that do not leak electromagnetic waves from sources or that shield external electromagnetic waves. In particul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00C01G53/00C09C1/24H01F1/36H05K9/00C09D7/61
CPCC01G49/00C01G53/00C09C1/24H01F1/36H05K9/00C09D7/69C09D7/70C09D7/61C08K3/22C09C1/245H05K9/0007C01P2004/54C08K2003/2265C01G49/06C01P2004/20C01P2006/42C09D5/36H05K9/0026
Inventor 安賀康二五十嵐哲也
Owner POWDERTECH
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