岡部マイカ工業所 List of Products and Services

The products of Okabe Mica Industry, made from natural mineral mica, are materials that combine thinness with excellent electrical insulation and heat resistance properties, making them suitable for electronic devices that require miniaturization, thinness, and high density. In recent years, as electronic devices have become increasingly complex, mica insulation materials are also required to have intricate shapes. Therefore, Okabe Mica Industry is advancing the development of new technologies for manufacturing custom mica molded products tailored to customer specifications. Generally, when it comes to molded products, there is an image that creating molds is necessary, and the prototype costs are very high. To address this, Okabe Mica Industry is exploring low-cost prototype molding using simple molds. This makes it possible to significantly reduce costs compared to prototypes made with traditional molds. Furthermore, it allows for the production of the final mold only after sufficient evaluation of the prototypes. Additionally, Okabe Mica Industry is continuously conducting research and development on the know-how of mica sheets suitable for such molding processes. Please feel free to consult us with any ideas you may have! Our specialized staff will respond sincerely!

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Okabe Maika Industrial Co., Ltd. has a long-standing track record as a manufacturer of electrical insulators, but we have taken on new challenges in different fields to improve the product characteristics for our customers in the generator manufacturing sector. Currently, we offer a lineup of three types of products: prepreg sheets, tapes, and plates. Until now, our applications have primarily focused on materials designed to protect generators and motors in the heavy electrical field from insulation degradation caused by corona discharge. In the future, we will assist in the design and development of conductive materials tailored to specific applications, not only in the heavy electrical field but also for the protection of electrical equipment subjected to high voltages, addressing static electricity issues in the semiconductor sector, and in the automotive industry, which is shifting towards electric energy. We are also able to accommodate prototype requests based on customer needs, so please feel free to consult with our specialized staff.

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A public research institute and university located in Fukuoka Prefecture are researching adsorbents for environmental purification. They requested our cooperation, leveraging our expertise in mica, and we conducted joint research. As part of this project, it was necessary to conduct fundamental research on suitable conditions for high-efficiency mica adsorbents. Okabe Mica Industry has the capability to procure mica and has experimental expertise through specialized chemical staff. In this project, qualitative confirmation and identification of the synthesized replacement mica were conducted by experienced analytical chemists, who analyzed how much ion species were adsorbed. Furthermore, we were able to quickly explore methods through a broad network of industry-academia-government collaboration, allowing for rapid consideration of synthesis methods and granulation. [Case Study] ■ Background - We received a request for cooperation from a public research institute and university in Fukuoka Prefecture and conducted joint research. ■ Challenge - It is necessary to conduct fundamental research on suitable conditions for high-efficiency mica adsorbents. *For more details, please refer to the PDF document or feel free to contact us.

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Our company has commercialized an ion generator using the principle of a mica deionizer. However, while customers are interested in negative ions, they lack knowledge and experience on how to use them, which has hindered progress in their consideration. Therefore, we conducted performance evaluations by incorporating the technology into actual units, investigated suitable installation methods, and made proposals to customers. Additionally, we established a method for antimicrobial testing in collaboration with public research institutes and universities to obtain catalog data that customers can use to appeal to consumers. We aim to gather knowledge widely, both internally and externally, to propose "things" and develop products that satisfy our customers. This is the direction we aspire to move towards in the future. [Case Study] ■ Background - Commercialized an ion generator using the principle of a mica deionizer. ■ Challenges - Customers are interested in negative ions but lack knowledge, which has hindered progress in their consideration. *For more details, please refer to the PDF document or feel free to contact us.

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To achieve stable quality in new product development, it was necessary to crush the particulate functional fillers and disperse them in the adhesive, but our company lacked the know-how for this. Therefore, we repeatedly conducted trials with a dispersion and kneading machine manufacturer until we achieved the ideal dispersion state, receiving numerous pieces of advice from their engineers. Using the prototypes developed, we further created and evaluated additional product prototypes. Two years later, we finally established the kneading method and succeeded in product development. We believe that not being rigidly attached to existing in-house technologies and actively seeking and incorporating new technologies from outside the company is an important aspect of future new product development. [Case Study] ■ Background - It was necessary to crush the particulate functional fillers and disperse them in the adhesive, but our company lacked the know-how. ■ Challenge - The powder acting as a functional filler was not evenly dispersed. *For more details, please refer to the PDF document or feel free to contact us.

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At Okabe Maika Industrial, we assist our customers in bringing their ideas of "I would like to try this" to life. A major feature of Maika is its "heat resistance" and "electrical resistance," but it also has other advantages such as being "easy to process" and having "high cost benefits." It is often thought that small-scale prototypes take longer to deliver, but rest assured! Okabe Maika Industrial is well-equipped to respond quickly.

• Other polymer materials
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• Organic Natural Materials

The heat-resistant insulating mica pipe is a product made by integrating laminated mica with silicone adhesive and shaping it into a pipe form. It has excellent insulating properties under high-temperature conditions and is used as an insulating sleeve in conjunction with dam washers for bolt insulation in high-frequency induction furnaces, arc melting furnaces, and various plant equipment. This product can be manufactured to the user's desired inner diameter, outer diameter, and length. 【Features】 ■ Excellent heat resistance ■ Can accommodate lengths up to 1000 mm ■ Can also be wrapped around a steel core *For more details, please download the PDF or contact us.

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Mica for induction furnaces is a product made by bonding glass cloth and ceramic paper to integrated mica using silicone adhesive. The ceramic paper is entirely made from biodegradable materials and complies with RCF regulations. It is mainly used as insulation between the coil and the crucible-shaped electric induction furnace, providing protection for the coil, insulation, and vibration absorption. Furthermore, the mica surface is slippery, making it easier to dismantle refractory materials during furnace body repair work. 【Features】 ■ Excellent heat resistance and electrical insulation properties ■ Available in roll form for easy installation *For more details, please download the PDF or contact us.

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Mica tape for fire-resistant wires is primarily used as the fire-resistant layer for fire-resistant wires. It is a product made by bonding assembled mica with various reinforcing materials using a heat-resistant silicone adhesive. OMF-8 has obtained UL94 V-0 certification (UL File No. E58537). DG88-AN, which has a micro-adhesive applied for work purposes, is used at the wire joint section. 【Features】 ■ Excellent electrical properties at high temperatures ■ Uniform thickness and characteristics ■ Highly flexible with excellent winding properties, ensuring good adhesion to conductors ■ DG88-AN has adhesive on one side, making it easy to work with *For more details, please download the PDF or contact us.

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Dry mica tape is a product that combines laminated mica with various reinforcing materials using a small amount of epoxy adhesive. It has excellent resin impregnation properties and is ideal for constructing insulation systems using the vacuum pressure impregnation (VPI) method for high-voltage coils. Prepreg mica tape is a product that combines laminated mica with glass cloth using epoxy adhesive. A significant feature is that the epoxy adhesive is in a semi-cured state (B stage), allowing for the construction of insulation systems solely through heat pressing after coil winding. 【Features】 - Dry mica tape has excellent impregnation properties. - Prepreg mica tape can be integrally formed using only heat pressing. - It has excellent flexibility and winding properties, resulting in good adhesion to coils. - It exhibits outstanding electrical insulation performance, starting with corona resistance. *For more details, please download the PDF or contact us.*

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The D461·MCT-BS dielectric voltage sheet is a product that integrates laminated mica with epoxy adhesive. It is also used as a partition board (barrier board) and a rigid reinforcement plate for high-voltage equipment. Even with a thin board thickness, it exhibits excellent electrical insulation properties, contributing to the thinning and lightweighting of various insulating materials. Additionally, MCT-BS has obtained UL94 V-0 certification. 【Features】 - Excellent resistance to corona, arcing, and tracking, as well as good high-frequency characteristics. - Superior processability, allowing for easy cutting, machining, and punching. - A product with minimal warping and high mechanical strength. - Excellent water resistance. - In the fields of materials for power equipment and electronic devices, it is expected to contribute to lightweighting, flame retardancy, and cost reduction. *For more details, please download the PDF or contact us.

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The flexible sheets D680 and D680A are products that integrate laminated mica with silicone adhesive, exhibiting excellent flexibility at room temperature and allowing for arbitrary deformation without heating. Furthermore, these products have obtained UL94 V-0 (D680, D680A) and UL94-5VA (D680) certifications, making them suitable for use as flame-retardant sheets. They can also be easily fixed with double-sided tape or similar methods. 【Features】 ■ Excellent thermal insulation and sealing properties, demonstrating high electrical insulation. ■ Excellent heat resistance. ■ Highly flexible at room temperature, allowing for arbitrary deformation. *For more details, please download the PDF or contact us.

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Okabe Maika Industrial Co., Ltd. has a long-standing track record as a manufacturer of electrical insulators, but has taken on new challenges in different fields to improve the product characteristics of our generator manufacturer customers. Generators have a large internal potential difference, and if there are any defects (voids), various discharges can occur, leading to insulation degradation. To solve this problem, we developed a sheet with "semiconductive" properties. This sheet is designed to easily fill the gaps in the complex shapes of generator coils by making the adhesive semi-cured to improve its fluidity. This semiconductive sheet is a conductive material that can change shape and harden even in complex geometries, making it suitable for various applications beyond just generators. [Case Study] ■ Background - Taking on new challenges to improve the product characteristics of our customers. ■ Issues - Generators have a large internal potential difference, and if there are any defects (voids), various discharges can occur, leading to insulation degradation. *For more details, please refer to the PDF document or feel free to contact us.

• Other polymer materials
• Other machine elements
• Organic Natural Materials

In factory production lines, static electricity-related troubles are addressed by the widespread use of ionizers. The needle-type discharge ionizer holds a significant market share, but it has the challenge of not being installable in narrow spaces. Therefore, the ionizer developed by Okabe Mica Industry uses mica as a dielectric, placing high-voltage and low-voltage electrodes on both sides. By leveraging the excellent electrical insulation properties of mica, it has become possible to make the dielectric thinner, successfully miniaturizing the high-voltage power supply. [Case Study] ■ Challenge: Cannot be installed in narrow spaces - Distance is needed for ion mixing - Height is required - High voltage is necessary *For more details, please refer to the PDF document or feel free to contact us.

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At Okabe Maika Industrial, we primarily produce mica tape by laminating film and glass cloth with mica. However, we received a request from a customer to laminate with a substrate that has a strength we have not previously encountered. The substrate requested by the customer had the following issues: 1. Due to its lack of strength, using it in the normal lamination process resulted in wrinkles. 2. When applying adhesive and drying it through heat treatment, the substrate would stretch. To address these challenges, we optimized the manufacturing process by implementing 1. optimization of the transport path and 2. introduction of a heat-pressing method through optimization of the lamination roll. We achieved results that satisfied the customer while also meeting the proposed cost. [Solution] ■ We implemented optimization of the manufacturing process by introducing a heat-pressing method through optimization of the transport path and lamination roll. *For more details, please refer to the PDF document or feel free to contact us.

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The customer manufactures units that use mica installed in frames of sizes requested by users. However, they were troubled by a request from a certain client to install mica units in smaller frames. Regarding this issue, they were able to overcome it by planning a new assembly method along with the development of a new high-performance mica unit. 【Case Study】 ■ Background - Communication with the customer is quite difficult. ■ Challenges - The customer manufactures units that use mica installed in frames of sizes requested by users. - There was a request to install mica units in smaller frames. *For more details, please refer to the PDF document or feel free to contact us.

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At the request of our customers, we received an inquiry about whether we could improve the electrical insulation performance of mica tape by more than 20% compared to conventional products in order to increase product output. The mica tape that constitutes the electrical insulation layer is made from mica foil, glass cloth, and adhesive. To meet this request, we attempted an approach by optimizing the mica paper. As a result, we discovered that the conventional mica paper has weaknesses that negatively affect insulation performance, and by eliminating these weaknesses, we were able to overcome the challenges. [Case Study] ■ Background - Inquiry about whether we could improve the electrical insulation performance of mica tape by more than 20% compared to conventional products to increase product output. ■ Challenges - Made from mica foil, glass cloth, and adhesive. - Attempted an approach by optimizing the mica paper. *For more details, please refer to the PDF document or feel free to contact us.

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This is a natural mineral with a mysterious property that allows it to be easily peeled into thin sheets due to its structure, which connects a sheet-like skeletal layer formed by chemically strong covalent bonds with K ion layers through relatively weak ionic bonds. Our company processes and manufactures mica products (sheets/tapes) for various applications using "hard mica" from India, which has excellent electrical insulation properties, and "soft mica" from Sri Lanka, which has excellent heat resistance. 【Features】 ■ Easily peelable ■ Electrical insulation ■ Heat resistance *For more details, please refer to the PDF document or feel free to contact us.

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"Mica" is a functional material that excels in heat resistance, insulation, and workability. While it has heat resistance and insulation properties comparable to ceramics, its excellent workability has garnered attention. 【Heat-resistant Mica Board D581A Features】 ● Unlike ceramics, it does not crack or chip due to impacts from drops. ● It maintains high strength without expansion or contraction even when heated to high temperatures. ● It is a flame-retardant (non-combustible) material (UL94 V-0 certified product). ● It maintains electrical insulation even under high-temperature heating conditions (UL746B certified product; D581A electrical characteristics: 760°C, D581 electrical characteristics: 750°C). ● It produces minimal smoke and odor when heated, and there is almost no release of low molecular siloxanes. ● It has excellent workability and can be used in various shapes. We also accept various processing requests. Thickness: 0.15–1.50mm - Router/Laser/Punching Thickness: 1.50–30.0mm - Router/Laser/Machining *We also offer consultations for insulation and insulation design, so please feel free to contact us. *For more details, please download the PDF or contact us.

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The insulating sheet D581 and D581A are products that integrate laminated mica with silicone adhesive. They are characterized by very low emissions of smoke, odor, gas, and blistering at high temperatures. Due to their excellent processability, we are able to customize them into shapes requested by users, and they are widely used as various heat-resistant insulating components. Additionally, they have obtained UL94 V-0 certification, as well as UL Thermal Index 746B (D581: electrical properties 750°C, mechanical properties 450°C; D581A: electrical properties 760°C, mechanical properties 600°C). (UL File No. E58537) 【Features】 ■ Almost no smoke or odor from high-temperature heating ■ Minimal reduction in strength and insulation resistance after heating ■ Excellent water resistance, demonstrating extremely high electrical insulation in high humidity environments ■ Strong edge strength, providing excellent workability for winding operations such as heater wires ■ Easy to process with punching *For more details, please download the PDF or contact us.

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