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  3. セイシン企業
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Manufacturing and processing contract
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セイシン企業

EstablishmentAugust 28, 1968
capital30000Ten thousand
number of employees290
addressTokyo/Shibuya-ku/9th Floor, NX Shinjuku Building, 5-34-7 Sendagaya
phone03-3350-5771
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last updated:Jan 21, 2026
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セイシン企業 List of Products and Services

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Contract processing, grading, screening

★Free Estimate★ We classify to achieve a sharper particle size using a wind classifier. If you are considering outsourcing processing, please feel free to consult with us!

We classify particle sizes into sharper states using a wind power classifier. We also perform large-scale classification processing using a vibrating sieve. Utilizing powder processing technology gained from years of contract processing and equipment sales experience, we also assist in the development of new products and provide consulting services. For more details, please download the catalog.

  • Processing Contract

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Contract Processing: Grinding (Wet Type)

★Free Estimate★ Micronization is possible. It is used in a wide range of fields, primarily for dispersion processing. If you are considering outsourcing processing, please feel free to consult with us!

Generally, wet grinding allows for finer particle size reduction than dry grinding and is widely used for dispersion and other applications. Grinding in a solvent enables efficient application of force to the material being ground. The grinding media and the material are forcibly stirred in the solvent to carry out the grinding process. It is utilized in a wide range of fields, particularly for the fine processing of high-density electronic materials and the dispersion of pigments in paints. For more details, please download the catalog.

  • Processing Contract
  • Contract manufacturing

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Contract Processing: Crushing (Dry)

We offer a variety of grinding machines ranging from coarse crushing to ultra-fine grinding. We provide total support from the development stage to product commercialization.

We offer a variety of grinding machines to meet a wide range of customer needs, centered around dry jet mills, including cutter mills and ball mills, capable of grinding from coarse particles to ultra-fine particles with an average particle size of several micrometers, as well as from a few grams of grinding tests to contract grinding in the hundreds of tons per month. If you are considering outsourcing processing, please feel free to consult with us. For more details, please download our catalog.

  • Processing Contract

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Contracted and commissioned measurements (particle size distribution, dust explosion, pore distribution, etc.)

There are measurements that can only be done by a powder machinery manufacturer!! Please contact us if you have any issues with the properties of powders.

At the Seishin Corporation's Powder Measurement Center, we offer contract measurement services. You can conveniently use our services for one-time measurements or for intermittent measurements conducted as part of quality control. You can obtain the necessary data quickly and accurately when you need it. The Seishin Corporation Powder Measurement Center is equipped with measurement technologies and know-how to meet your needs. We pride ourselves on having the best knowledge and experience in Japan regarding powders, so please feel free to consult with us. We look forward to hearing from you.

  • Contract measurement

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Contract processing (crushing, classification, drying, granulation, etc.)

Providing the best contract processing environment, processing technology, and quality in the country for powder and granular processing. If you are considering outsourcing processing, please feel free to consult with us!

Since our establishment, we have pursued powder technology and accumulated experience, achievements, and know-how in powder processing. We provide products that meet our customers' needs. To accommodate various raw materials and processing, we have established four factories in Japan that perform crushing (from coarse to fine), drying, granulation, classification, and mixing. We have a diverse range of processing achievements for various raw materials, including ceramics, plastics, glass, chemical products and formulations, pharmaceuticals, pesticides, minerals, food, food additives, and flavors, among others. If you have any questions or requests regarding contract processing of powders and granules, please feel free to contact us.

  • Contract manufacturing
  • Processing Contract

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★Sample Present Maika (Seishin Maika) Dry Grinding Series

From car paint to cosmetics - creating new possibilities with mica!

Seishin Maika is a mica produced by our company, a comprehensive manufacturer of powder equipment, using the processing and measurement technologies we have cultivated since our founding. We provide stable, high-quality mica through the procurement of raw materials, processing, and high-level quality management.

  • paint
  • others

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★Free Sample Gift★ PTFE Powder

The trump card for cost reduction! Recycled PTFE resin powder

Recommended for lubricants and coatings! PTFE resin powder achieved at a low price Compliant with the European environmental regulation RoHS directive We offer 5 grades of PTFE. We have 5 grades of PTFE with an average particle size of 3 to 25 μm, which are very effective not only for imparting sliding properties and solid lubrication but also as lubricants, plastic additives, and ink waxes. 【Achieving Low Prices】 By using recycled PTFE as raw material, we can find significant advantages in price compared to virgin products. *Chemical powders can be delivered as samples free of charge up to 100g per product. Only Betterzol is sold as a sample in 250g for 1,000 yen. If you would like a sample, please download the sample application form from "PDF Download."

  • Lubricants
  • paint

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★Free Sample Giveaway★ Polypropylene Powder (PPW-5J)

If you are looking for PP (micronized polypropylene), check out Seishin Corporation's polypropylene resin!

PPW-5J is characterized by showing hardness greater than polyethylene and a high softening point, while having a low melting viscosity.

  • paint
  • glue

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EAA Emulsion

Improve coating performance!

Soap-free colloidal emulsion This is a soap-free colloidal emulsion primarily made from polyethylene-based resin, blended with various crosslinking agents and additives for different properties. After the evaporation of moisture, it forms a film with a crosslinked structure, which does not re-dissolve in water and has very low hygroscopicity.

  • paint
  • glue
  • others

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