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Plastic-Based High-Performance Filler Micropearl™
High-performance fine particles that meet the needs of next-generation devices with precise thickness control and stress relaxation
High-performance fine particles produced with proprietary particle manufacturing technology, combining precise particle size distribution with excellent dispersibility and flexibility. They contribute to thickness control and stress relaxation in applications such as spacers for light control films and glass, as well as in fields including displays,semiconductor packaging, and all-solid-state batteries.
- Mobility
- Electronics
- Growing need for smart film / glass
- Stabilization of dimming function by gap control
- Technical information
- Document download
Growing need for smart film / glass
Smart film and glass are increasingly adopted for automobile exteriors to meet the growing needs for privacy and heat control inside the vehicle, as well as for the convenience of being able to instantly toggle heat on and off.
Smart film and glass are required to have several functions such as contrast, switching speed, applicability to curved surfaces, and durability.
Shade open (transparent state)
Stabilization of dimming function by gap control
The Micropearl series offers functional fine particles with a uniform particle size distribution to serve a variety of functions required for smart film and glass. Uniform particle size distribution and a low percentage of large particles enable uniform gap control. The series is highly flexible and elastic, preventing circuit board damage and particle migration. Excellent resistance to voltage, heat, and chemicals ensures high reliability even in high-temperature and high-humidity environments.
The series offers a diverse lineup of Colours, hardness, and particle sizes to achieve precise gap control. The black variation prevents light from escaping through the particles to improve the contrast of smart film and glass. Processing such as metal coating enables the series to meet various needs.
Shade open (dimmed state)
Technical information
Technical overview
Uniform particle size distribution
- Uniform gap control
- Reduced large particle leading to the mitigation of surface irregularities.
Soft and elastic
- Substrate damage prevention
- Particle movement prevention
Blackness and shading
- Excellent light shading
- Contrast improvement of smart film
A wide range of options
- Many series (Colour, Hardness, Particles size)
- A variety of metal types available to carter to your specific requirements.
Technical details
Uniform particle size distribution
| Low Cv | High Cv | |
|---|---|---|
| Image |  |
 |
| When vibrating |
Inhibits particle migration | Particle migration is easy to occur |
Soft and elastic
Capable of stress relief without compromising substrate integrity. 
Blackness and shading
Co-polymer particles with black pigment dispersed, excellent for light shielding properties and resistance to exudation and corrosion.
Excellent heat resistance and anti-corrosion product can be used in wider range of applications.
Excellent heat resistance and anti-corrosion product can be used in wider range of applications.
Light transmittance exists 
Reduction of light transmision 
A wide range of options
- Hardness & lineup
- Comparison Table
- Micropearl™ SP,GS,EX
- Micropearl™ KB,KY
- Micropearl™ EXH
- Micropearl™ EZ,SLC
- Document download
Hardness/particle size lineup
Micropearl™
Product- SP
- GS
- EX
overview
-
- SP
- GS
- Plastic particles with uniform particle size distribution
- Capable of uniform thickness control
- Voltage resistance, heat resistance, and chemical resistance
-
- EX
- Plastic particles with more uniform particle size distribution
→Capable of highly precise thickness control. - Excellent voltage resistance, heat resistance, and chemical resistance
Micropearl™
Product- KB
- KY
overview
-
- KB
- Polymer particles dispersed with carbon black
- Excellent blackness, light shielding effect, resistance to exudation, heat resistance, and chemical resistance
→Usable in wide range of applications.
-
- KY
- Polymer particles dispersed with black “insulated” pigment
→Usable at parts subject to voltage when there is a risk of short-circuiting.
Micropearl™
Product- EXH
overview
-
- Polymer particles with high hardness
→Excellent dimension stability against pressurization - Low specific gravity compared to glass beads
→ Prevention of sedimentation in resin
- Polymer particles with high hardness
Micropearl™
Product- EZ
- SLC
overview
-
- EZ
- Polymer particles with flexibility
→Effective for reducing vibration noise and of damage to substrate - Low recovery rate
→Also optimum as gap material for soft base material such as film.
-
- SLC
- Silicone-based particles
- Capable of reducing vibration noise, reducing cure shrinkage, and soft base material thickness control.
Comparison in hardness and particle size
We offer hard to soft products with particle sizes ranging from1.5 µm to 600 µm in accordance with applications.
Hardness
Particle size
Particle size
| Particle size | Cv | |
|---|---|---|
| Micropearl™ EX |
|
2〜3% |
| Micropearl™ SP |
|
5% |
| Micropearl™ GS |
|
7% |
Micropearl™ SP,GS,EX
Characteristics
- Small particle size
- Gap control
- Provision of embossing
- Simulated specimen
- Process saving
- Heat resistance
Plastic particles with uniform particle size distribution capable of uniform thickness control. Excellent in voltage resistance, heat resistance, and chemical resistance.
Advantages of using plastic particles
1Hardness control
Offering optimum hardness, not too hard nor too soft.
2Excellent particle size distribution
In pursuit of higher definition and higher precision at low Cv value.
| Micropearl™ EX | General purpose beads | |
|---|---|---|
| Cv | Low Cv (narrow particle size distribution) | High Cv (wide particle size distribution) |
| Image diagram |  |
 |
| On vibration | Inhibit the movement of particles | Easy movement of particles |
| Number of particles | Higher number of particles engaged in gap control. Effective gap control with fewer particles. |
Fewer particles are engaged in gap control Higher number of particles required for gap control. |
3Stability
Due to its excellent heat resistance compared to acryl particles, Micropearl™ is stable even in the temperature range of −40 to 200°C.
Applications
It is possible to provide a comb of particles and adhesives.
- LCD spacer (display/light control)
- Gap control for adhesive (Sensor/Enclosure/Other electric and optical components)
- Embossing molding material
- Simulated/inspection specimen
- Coloring agent containing particles
Micropearl™ KB,KY
Characteristics
- Small to large particle sizes
- Gap control
- Provision of embossing
- Simulated specimen
- Process saving
- Light shielding effect
- Heat resistance
Polymer particles with black pigment dispersed, exhibiting excellent blackness, light shielding properties, and resistance to exudation and corrosion.
Excellent heat and chemical resistant products can be used in wider range of applications.
Advantages of using plastic particles containing black pigment
Applications
Please consider this model when Micropearl™ is required to have a light shielding effect.
- Display related applications
- Optical lens related products
- Simulated/inspection specimen
- Smart (light control) glass
Micropearl™ EXH
Characteristics
- Hard
- Small to medium particle size
- Gap control
- Provision of embossing
- Process saving
- Heat resistance
Even though it is a polymer particle, it has excellent dimensional stability against pressurization due to its high hardness. Compared to inorganic particles, it also reduces damage to the substrate and prevents sedimentation in resin.
Advantages of using high-hardness plastic particles
Applications
- Substitution of Silica particles
- Can be added to adhesives for gap material.
- Gap material between glass substrates
Micropearl™ EZ,SLC
Characteristics
- Soft
- Gap control
- Reduction of cure shrinkage
- Small to ultra large particle size
- Heat resistance
- Reduction of damage
- Hole forming
The model EZ, soft polymer particles, exhibits excellent vibration noise reduction and substrate damage reduction effects. Due to its low recovery rate, the model EZ is also optimum for gap control of soft base materials including film.
The model SLC, soft silicone-based particles, exhibits excellent vibration noise reduction and substrate damage reduction effects. This model exhibits heat resistance unique to silicone, and is chemically stable.
SLCAdvantage of using soft particles
As this model deforms in accordance with the pressure applied, damage caused at the time of mounting can be reduced.
EZAdvantage of using soft particles with low recovery rate
- It is possible to minimize damage to the substrate, wiring, and others.
- It is possible to absorb vibration noise from the surrounding area.
- It is anticipated to reduce spring back, prevent adhesive layer peeling, and improve reliability.
EZApplications
- Adhesive for (pressure) sensor
- Conductive paste/die bonding agent
- Adhesive to be applied between films
SLCApplications
- Gap material for silicone adhesive
- Gap material for conductive paste/die bonding agent
Document download
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