Microsphere (Micropearl™)
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- Microsphere (Micropearl™)
What is microsphere produced by Sekisui Chemical?
Plastic particles with uniform particle size distribution.
They can be used in a variety of applications including gap formation in automobile parts and optical components. Coating the particles with various metals adds further functions.


Wide variation of products
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- Wide size range
- Wide size lineup from 1.5 µm to 600 µm
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- Various hardness control
- Particles with optimum hardness and resilience can be selected in accordance with the application.
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- Chromaticity adjustment in accordance with application
- The chromaticity can be adjusted in accordance with the surrounding part/material and to give them a light blocking effect.
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- Various metal coatings
- Micropearl™ can be used as a high-performance conductive filler once its surface is plated.
Four properties
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- Uniformity
- High-accuracy particle size distribution thanks to our proprietary particle manufacturing technology
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- Followability
- Recovers its original shape even when a stress is temporarily applied, thus maintaining its spacer and conductivity functions.
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- Stress relaxation characteristics
- The plastic’s flexibility reduces the damage to the surrounding part/material.
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- Stability
- Usable with solvent or in a voltage environment.
Lineup
Sekisui Chemical offers Plastic-based Micropearl™ and Metal-plated Micropearl™.
The Micropearl™ series from Sekisui Chemical is high quality and can be customized in accordance with the customer’s demands such as size, hardness, coloring, and metal type.

Plastic-based
Micropearl™
Series: SP, GS, EX, KB, KY, EXH, EZ, SLC
Five characteristics and performances
- When you have concerns about damage to objects due to contact with other objects.
- When looking for a material with high thickness control.
- When you want to eliminate uneven adhesion.

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- Uniformity
- High-accuracy particle size distribution thanks to our proprietary particle manufacturing technology
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- Stability
- Excellent in chemical resistance, voltage resistance, and heat resistance.
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- Flexibility
- Achieves no damage to the surrounding part/material.
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- Resilience
- Control of shape memory property improves the reliability against external influence.
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- Customizability
- We offer customization of hardness, resilience, and surface treatment, and others in accordance with your application.
Products/technologies Micropearl™ can replace
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Glass beads -
Silica filler -
Culture mediums -
Embossing molding material -
Simulated specimens
If you have a problem with any of these materials, consider Micropearl™.
Applicable fields
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Organic EL/LCD panels -
All-solid-state battery for BEV/HEVs -
Semiconductor ICs -
Light control film

Metal-plated Micropearl™
Series: AU
Five characteristics and properties
- When you have concerns about the damage to the object due to contact with other objects.
- When looking for a material with stable conductivity.
- When you want to eliminate uneven adhesion.

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- Uniformity
- High-accuracy particle size distribution thanks to our proprietary particle manufacturing technology
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- Dispersibility
- The light weight of Micropearl™ AU allows it to be uniformly dispersed in resin and paste in an easy manner.
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- Flexibility
- Achieves no damage to the surrounding part/material. As it is possible to make a large contact area of conductor, the resistance can be lowered.
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- Resilience
- Control of shape memory property improves the reliability against external influence.
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- Customizability
- We offer customization of hardness, resilience, and surface treatment, and others in accordance with your application.
Products/technologies Metal-plated Micropearl™ can replace
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Metal-based fillers -
Carbon black -
Metal foil clad material -
Metal foil collectors
If you have a problem with any of these materials, consider Micropearl™.
Applicable fields
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Semiconductor ICs -
Electromagnetic shield for EV parts, etc. -
Various electronic parts -
Lithium ion batteries (LIB)
Can Micropearl™ be used for applications like these?
Sekisui Chemical finds solutions to issues that appear exceedingly difficult to solve, together with customers.
Please consult with us.
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- Medical care
- Use Micropearl™ for cell culture medium by taking advantage of its large surface area.
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- Electronic parts
- Use Micropearl™ for precise gap material and spacer in ultrafine area.
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- Automobiles
- Use Micropearl™ for light control glass with sophisticated design and liquid crystal layer or connection of large-size display.
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- Batteries
- Use Micropearl™ to give conductivity, heat radiation, and electromagnetic wave shielding properties to the stress-relaxing material and resin structure of all-solid-state batteries.
in collaboration with Fujitsu Design Center
Explaining the technology of chemical materials used in the electronics field by comparing them to athletes
Fine partclesAnalogous to…
Artistic Swimming Team