Top 10 PMMA Microsphere Manufacturers Serving Korea in 2026

Overview of the PMMA Microsphere Market Serving Korea in 2026

Poly(methyl methacrylate) microspheres, commonly called PMMA microspheres, PMMA particles, acrylic microspheres or PMMA beads, are engineered spherical polymer particles manufactured primarily from methyl methacrylate.

Unlike conventional PMMA resin pellets or irregular acrylic powders, PMMA microspheres are designed to provide controlled properties such as:

• Particle diameter;

• Particle-size distribution;

• Sphericity;

• Crosslink density;

• Refractive index;

• Surface morphology;

• Porosity;

• Thermal stability;

• Solvent resistance;

• Mechanical strength.

These properties make PMMA microspheres useful across a broad range of Korean industries, including:

• Display materials;

• OLED and LCD optical films;

• LED light diffusion;

• Anti-glare films;

• Paints and coatings;

• Plastic films;

• Anti-blocking additives;

• Cosmetics;

• Electronic materials;

• Conductive adhesives;

• Porous ceramics;

• Battery and advanced material research;

• Calibration;

• Microfluidics;

• Biomedical research.

South Korea is especially important for PMMA microsphere suppliers because it has one of the world's strongest display-material ecosystems.

Invest Korea states that Korea has maintained a leading position in the display industry for approximately two decades and held about 74.2% of the global OLED market in 2023. Korea's display supply chain includes major panel companies such as Samsung Display and LG Display together with domestic and international material, component and equipment manufacturers. (ombudsman.kotra.or.kr)

This ecosystem remains active in 2026. Korea's Ministry of Trade, Industry and Resources held K-Display 2026 in Seoul on July 22, bringing together major OLED panel makers and domestic and international materials, parts and equipment companies. (english.motir.go.kr)

PMMA microspheres can therefore serve several Korean high-value industries where optical performance, controlled particle diameter and material reproducibility are important.

This guide compares ten PMMA microsphere manufacturers that can serve customers in Korea in 2026.

SANYU GROUP is ranked second and is the only Chinese manufacturer included in this ranking.

What Is a PMMA Microsphere?

PMMA microspheres are spherical polymer particles composed primarily of poly(methyl methacrylate).

Commercial PMMA particles may be manufactured as:

• Non-crosslinked PMMA;

• Crosslinked PMMA;

• Highly crosslinked PMMA;

• Monodisperse PMMA;

• Broad-distribution PMMA;

• Porous PMMA;

• Functionalized PMMA;

• Fluorescent PMMA;

• Metal-coated PMMA.

They can be supplied as:

• Dry powder;

• Aqueous dispersion;

• Small research packages;

• Pilot-scale quantities;

• Industrial bulk packaging.

One important purchasing distinction is that “acrylic microsphere” does not always mean pure PMMA.

Acrylic particles may contain:

• Pure PMMA;

• PMMA crosspolymer;

• Methyl methacrylate copolymers;

• Styrene-methyl methacrylate copolymers;

• Other acrylic polymers.

For applications requiring specifically defined polymethyl methacrylate chemistry, buyers should confirm the exact polymer composition with the manufacturer.

How We Selected the Top PMMA Microsphere Manufacturers Serving Korea

The manufacturers were evaluated using publicly available technical and product information reviewed in 2026.

The principal ranking criteria were:

1. Confirmed PMMA or PMMA-based microsphere manufacturing;

2. Particle-size range;

3. Particle-size distribution;

4. Sphericity;

5. Monodisperse product availability;

6. Crosslinked and non-crosslinked options;

7. Optical-material capability;

8. Coatings and polymer applications;

9. Cosmetic-grade particle capability;

10. Porogen and ceramic applications;

11. Custom particle development;

12. Research-to-production scalability;

13. Quality documentation;

14. Accessibility to Korean buyers;

15. Relevance to Korean industrial applications.

Additional weight was given to companies with particular strengths in displays, electronics, cosmetics or advanced materials because these sectors are especially relevant to the Korean market.

This ranking is an editorial procurement guide.

It is not based solely on company revenue, global market share or independently audited head-to-head product testing.

Quick Comparison of the Top 10 PMMA Microsphere Manufacturers

1. Sunjin Beauty Science

Sunjin Beauty Science ranks first because it is a South Korean manufacturer with direct experience producing PMMA polymer beads for cosmetic and functional powder applications.

The company is based in Seoul and supplies cosmetic raw materials internationally.

Its polymer bead platform includes spherical particles designed to modify:

• Skin feel;

• Spreadability;

• Oil absorption;

• Soft-focus effects;

• Makeup adhesion;

• Formulation texture.

Sunjin states that it manufactures both organic polymer beads and inorganic microspheres and offers particle sizes and structures tailored to different applications. (sunjinbs.co.kr)

SUNPMMA Series

Sunjin's polymer bead catalog lists the SUNPMMA-S series as polymethyl methacrylate.

Published examples include:

• SUNPMMA-S: approximately 7 µm;

• SUNPMMA-S Plus: approximately 13 µm;

• SUNPMMA-V: approximately 25 µm.

The catalog identifies these products as 100% PMMA. (sunjinbs.co.kr)

Different grades are intended to modify sensory properties and formulation behavior.

Porous and Specialty PMMA

Sunjin has also developed PMMA particles with different morphologies and oil-absorption characteristics.

These structures have been used to create:

• Soft-focus effects;

• Sebum absorption;

• Silky skin feel;

• Improved spreading;

• Pore-blurring effects.

Why Sunjin Ranks First

For customers specifically developing cosmetic products in Korea, Sunjin offers major advantages:

• Domestic manufacturing experience;

• Korean technical support;

• Established K-beauty ingredient expertise;

• Multiple PMMA bead structures;

• Local sample access;

• Local formulation knowledge.

Important 2026 Sustainability Consideration

Sunjin is increasingly developing silica materials as alternatives to plastic beads.

Its 2026 communications actively promote microplastic-free silica alternatives to PMMA and Nylon-12 particles, reflecting growing sustainability pressure in global cosmetics. (sunjinbs.co.kr)

This does not eliminate the importance of its PMMA technology, but it means cosmetic formulators should evaluate both regulatory requirements and long-term formulation strategies.

Best For Korean Customers

Sunjin is particularly relevant to:

• K-beauty companies;

• Makeup manufacturers;

• Sunscreen formulators;

• Primer formulations;

• Skin-care texture modifiers;

• Cosmetic sensory powders.

For optical, ceramic or precision calibration applications, other suppliers in this ranking may offer broader technical ranges.

2. SANYU GROUP

SANYU GROUP is a specialist manufacturer of polymer microspheres, magnetic beads and functional particles.

Its PMMA portfolio includes both conventional and highly crosslinked PMMA microspheres.

Published PMMA products cover a broad range of particle sizes, including:

• 3 µm;

• 10 µm;

• 20 µm;

• 30 µm;

• 50 µm;

• 90 µm;

• 100 µm;

• 200 µm;

• 400 µm;

• 600 µm;

• 900 µm.

Selected products are available as:

• Dry powder;

• 10% aqueous suspension.

For example, SANYU's 10 µm crosslinked PMMA microspheres are manufactured using approximately 50% EGDMA as the crosslinking monomer. The resulting highly crosslinked structure is designed to improve mechanical strength, solvent resistance and dimensional stability. (nanomicronspheres.com)

Main Applications

SANYU positions its PMMA particles for:

• Porogens;

• Sacrificial templates;

• Polymer fillers;

• Optical materials;

• Composite materials;

• Chromatography research;

• Separation-material research;

• Particle calibration;

• Advanced functional materials.

Larger grades such as 100 µm and 400 µm are particularly relevant to controlled pore formation and sacrificial-template applications. (nanomicronspheres.com)

Why SANYU Ranks Second

SANYU ranks second because it offers unusual flexibility across both particle size and product format.

Advantages include:

• Crosslinked PMMA;

• Conventional PMMA;

• Fine and large microspheres;

• Dry powder;

• Suspension format;

• Customized particle diameter;

• Customized solids concentration;

• Surface modification;

• OEM manufacturing;

• Bulk supply;

• Custom packaging.

Relevance to Korea

Korean companies developing optical materials, coatings, porous structures or advanced polymer systems often need to screen several particle sizes before selecting a final grade.

A manufacturer able to provide both laboratory samples and larger commercial quantities can simplify the transition from R&D to production.

Best For Korean Customers

SANYU may be particularly suitable for:

• Display-material R&D;

• Optical diffusion materials;

• Polymer composites;

• Porous ceramics;

• Battery-material research;

• Coatings;

• Advanced fillers;

• Custom PMMA development;

• Second-source qualification.

What Korean Buyers Should Confirm

Request:

• Mean diameter;

• D10;

• D50;

• D90;

• CV;

• SEM images;

• Crosslink density;

• Residual MMA;

• Refractive index;

• Thermal decomposition data;

• Suspension additives;

• K-REACH documentation;

• Korean import documentation.

SANYU is the only Chinese manufacturer included in this ranking.

3. Sekisui Kasei

Sekisui Kasei manufactures TECHPOLYMER, one of the broadest PMMA particle platforms available for high-performance industrial applications.

The company's proximity to Korea and strong focus on display and optical applications make it especially relevant to Korean customers.

MB Series

TECHPOLYMER MB consists of spherical non-crosslinked PMMA particles.

Published characteristics include:

• PMMA composition;

• Spherical morphology;

• Density around 1.2 g/cm³;

• Refractive index around 1.49.

Applications include:

• LCD displays;

• Paints;

• Inks;

• Cosmetics. (tech-p.com)

MBX Series

MBX consists of crosslinked PMMA particles.

These particles provide improved:

• Solvent resistance;

• Heat resistance;

• Shape stability.

Sekisui specifically identifies:

• LCD displays;

• LED lighting;

• Light diffusion;

• Paints;

• Inks;

• Cosmetics

as applications. (tech-p.com)

SSX Monodisperse PMMA

SSX consists of crosslinked monodisperse PMMA particles.

The standard refractive index is approximately 1.49, but Sekisui states that customized refractive indices from approximately 1.49 to 1.59 can be developed. (tech-p.com)

This is especially valuable in optical materials because light scattering depends strongly on the refractive-index difference between the particle and surrounding polymer.

Why Sekisui Ranks Third

Sekisui offers:

• Non-crosslinked PMMA;

• Crosslinked PMMA;

• Monodisperse PMMA;

• Porous PMMA;

• Optical customization;

• Refractive-index adjustment;

• Nano-to-micrometer particle technology.

The company states that TECHPOLYMER properties can be customized in areas including particle size, size distribution, shape, refractive index, hardness, solvent resistance and heat resistance. (tech-p.com)

Best For Korean Customers

Sekisui is particularly strong for:

• OLED/LCD-related optical films;

• LED light diffusion;

• Anti-glare materials;

• Paints;

• Coatings;

• Functional plastics;

• Cosmetic materials.

4. Soken Chemical & Engineering

Soken Chemical & Engineering manufactures Chemisnow functional fine particles.

Its PMMA platform is particularly relevant to Korea because several product lines are specifically designed for optical films, anti-glare materials and display applications.

Soken's product overview identifies PMMA as the material for its MX, MZ, MR, KMR and MP series. (sokenchem.com)

MX Series

The MX Series consists of crosslinked monodisperse acrylic particles.

Published particle diameters extend from approximately 0.3 µm to 30 µm, depending on grade.

Key properties include:

• Narrow particle-size distribution;

• Spherical morphology;

• Heat resistance;

• Solvent resistance;

• Transparency;

• Optical diffusion;

• High brightness.

Applications include:

• Optical diffusion sheets;

• Anti-glare film;

• Anti-blocking;

• Pore-forming materials;

• Matting agents for paints and inks. (sokenchem.com)

MP Series

The MP Series consists of non-crosslinked acrylic particles from approximately 0.15 to 0.4 µm.

The particles are monodisperse and spherical.

Applications include:

• Toner;

• Cosmetics;

• Pore-forming materials. (sokenchem.com)

Why Soken Ranks Fourth

Soken's major strength is the ability to control:

• Diameter;

• Distribution;

• Crosslinking;

• Heat resistance;

• Solvent resistance;

• Optical diffusion.

This is particularly valuable in Korea's display and electronics supply chain.

Best For Korean Customers

Soken is especially suitable for:

• Optical films;

• Anti-glare films;

• Display materials;

• Toner;

• Coatings;

• Anti-blocking;

• Porogens.

5. Matsumoto Yushi-Seiyaku

Matsumoto Yushi-Seiyaku manufactures Matsumoto Microsphere M-series PMMA particles.

The M-series includes both crosslinked and non-crosslinked PMMA grades. (mtmtys.co.jp)

Published PMMA Products

Examples include:

M

PMMA particles with a microscopically rough spherical surface and a particle-size range around 5–20 µm.

M-100

Smooth spherical PMMA particles around 5–20 µm.

M-101

Smooth spherical PMMA particles around 5–15 µm with a sharper particle-size distribution.

M-305

Crosslinked PMMA particles around 5–20 µm with improved solvent resistance.

M-306

Crosslinked PMMA particles around 5–15 µm combining a sharper distribution with solvent resistance. (mtmtys.co.jp)

Main Strength

Matsumoto can control not only polymer chemistry but also:

• Surface roughness;

• Particle shape;

• Crosslinking;

• Absorption behavior.

This creates different sensory and formulation properties.

Best Applications

Relevant applications include:

• Cosmetics;

• Functional coatings;

• Porogens;

• Texture modification;

• Anti-tack;

• Spacers;

• Polymer additives.

Best For Korean Customers

Matsumoto may be especially attractive for Korean:

• Cosmetic companies;

• Functional powder formulators;

• Specialty coating developers;

• Porous-material researchers.

6. microParticles GmbH

microParticles GmbH is a German manufacturer specializing in highly monodisperse nano- and microspheres.

Its PMMA platform covers approximately 100 nm to 200 µm across more than 70 discrete particle sizes.

Both crosslinked and non-crosslinked particles are available. (microparticles.de)

Key Specifications

Published characteristics include:

• Particle range: 100 nm–200 µm;

• CV below 5%;

• Crosslinked and non-crosslinked options;

• Refractive index around 1.48;

• Density around 1.19 g/cm³;

• Low autofluorescence.

Precision Particle Characterization

For selected products, microParticles publishes actual:

• Batch number;

• Mean diameter;

• Standard deviation;

• CV;

• Solids concentration.

For example, its 0.1 µm product reports an actual mean diameter of 0.100 µm and a CV of approximately 4%, while several other submicron grades have even narrower reported CV values. (microparticles.de)

Main Applications

Applications include:

• Instrument calibration;

• Microfluidics;

• Biomedical research;

• Particle tracing;

• Surface science;

• Optical research;

• Functional coatings.

Why microParticles Ranks Sixth

The company is especially strong where precision is more important than commodity cost.

Best For Korean Customers

microParticles may be ideal for:

• Universities;

• Semiconductor and microfluidic research;

• Calibration laboratories;

• Biomedical engineering;

• Advanced particle characterization;

• Research requiring extremely narrow distributions.

7. Cospheric

Cospheric is a U.S.-based supplier of precision spherical particles.

Its PMMA platform offers one of the broadest publicly available standard size ranges.

Cospheric supplies pure, uncrosslinked PMMA microspheres from approximately 1 µm to 3.5 mm in free-flowing dry powder form. (cospheric.com)

Main Applications

Cospheric lists applications including:

• Porous ceramics;

• Microfluidics;

• Biomedical research;

• Life sciences;

• Fillers;

• Optical research.

Silver-Coated PMMA

Cospheric also supplies silver-coated PMMA microspheres.

Selected products range from approximately 5 µm to 700 µm and are designed for:

• Conductive adhesives;

• Bondline spacers;

• Anisotropic conductive film applications;

• Electronic assemblies. (cospheric.com)

Relevance to Korean Electronics

Conductive spacer beads can be especially relevant to companies working with:

• Display assemblies;

• Electronic packaging;

• Conductive adhesives;

• Precision bondline control.

Best For Korean Customers

Cospheric is particularly useful for:

• Precision spacing;

• Electronics research;

• Conductive spacers;

• Large PMMA spheres;

• Porous ceramics;

• Flow visualization.

8. Lamberti / Microbeads

Lamberti Group's Microbeads division manufactures Spheromers, highly uniform crosslinked PMMA beads.

Spheromers are available in seven particle sizes from approximately 6 µm to 60 µm.

The main particle peak typically has a coefficient of variation between approximately 1% and 3%. (polymerbeads.lamberti.com)

Key Properties

Spheromers provide:

• Crosslinked PMMA;

• Excellent sphericity;

• Narrow particle-size distribution;

• High transparency;

• High mechanical strength;

• Thermal resistance;

• UV stability;

• Refractive index around 1.48.

Light Diffusion

Lamberti specifically positions Spheromers as light-diffusing additives.

The particles can be used in engineering plastics such as:

• Polycarbonate;

• Polystyrene;

• PET/PETG;

• ABS;

• SAN.

Applications include:

• LED lighting;

• Light-diffusion films;

• Signs;

• Displays;

• Consumer appliances. (polymerbeads.lamberti.com)

Anti-Blocking

PMMA Spheromers can also function as anti-blocking particles in polymer films.

Their narrow distribution helps create controlled surface protrusions while minimizing unnecessary haze. (polymerbeads.lamberti.com)

Best For Korean Customers

Lamberti is particularly relevant to:

• Display films;

• Light-diffusion plastics;

• Transparent films;

• Coatings;

• Anti-blocking;

• Adhesives.

9. Polysciences

Polysciences offers a dedicated PMMA microsphere portfolio for research, coatings, diagnostics and industrial applications. (polysciences.com)

Available products include:

• Monodisperse PMMA;

• Broad-distribution PMMA;

• Dry powder;

• Aqueous suspensions.

One broad-distribution product contains PMMA microspheres from approximately 1–10 µm at 100% solids in dry form. (polysciences.com)

Surface Characteristics

Polysciences notes that PMMA is less hydrophobic than polystyrene and may therefore provide lower nonspecific protein and peptide adsorption in selected applications.

Its PMMA products may also contain surface carboxylic acid groups. (polysciences.com)

Best Applications

Polysciences is particularly useful for:

• Biomedical research;

• University laboratories;

• Diagnostic research;

• Coating experiments;

• Particle comparison;

• Proof-of-concept development.

10. Bangs Laboratories

Bangs Laboratories is a U.S. specialist in microspheres and particle technologies.

The company's technical library confirms that its PMMA microspheres are solid, nonporous polymer bead products. (bangslabs.com)

Main Strengths

Bangs has broad expertise in:

• Particle characterization;

• Microsphere selection;

• Surface chemistry;

• Calibration;

• Biomedical applications;

• Diagnostic R&D;

• Custom particle development.

Its technical documentation lists representative PMMA characteristics including a density of approximately 1.19 g/cm³ and refractive-index characteristics distinct from polystyrene.

Best Applications

Bangs may be particularly relevant to:

• Instrument development;

• Calibration;

• Biomedical research;

• Diagnostic research;

• Custom microsphere projects.

Procurement Consideration

The company's current public product catalog emphasizes several other particle materials more prominently than PMMA.

Korean buyers should therefore directly confirm:

• Current PMMA particle sizes;

• Standard grades;

• Package sizes;

• MOQ;

• Lead time;

• Custom manufacturing capability.

Which PMMA Microsphere Manufacturer Is Best for Each Application?

The best PMMA supplier depends on what the particles need to do inside the final product.

Best PMMA Microspheres for Korean Display and Optical Applications

Strong suppliers include:

• Sekisui Kasei;

• Soken Chemical;

• Lamberti / Microbeads;

• SANYU GROUP.

Important parameters include:

• Particle diameter;

• Refractive index;

• CV;

• Transparency;

• Thermal stability;

• Resin compatibility.

Korea's display ecosystem makes this one of the most commercially relevant PMMA applications in the country.

Korea's Ministry of Trade, Industry and Resources highlighted display materials, components and equipment suppliers at K-Display 2026, illustrating continued investment in the display supply chain. (english.motir.go.kr)

Best PMMA Microspheres for Light Diffusion

Recommended suppliers include:

• Sekisui Kasei;

• Soken Chemical;

• Lamberti;

• SANYU.

The key optical mechanism is the refractive-index difference between the microsphere and the surrounding polymer matrix.

Important specifications include:

• Particle refractive index;

• Matrix refractive index;

• Particle diameter;

• Particle loading;

• Distribution;

• Transparency.

Best PMMA Microspheres for Anti-Glare Films

Soken Chemical and Sekisui Kasei are particularly strong.

Soken's MX Series is directly positioned for anti-glare films and optical diffusion sheets. (sokenchem.com)

Critical parameters include:

• Particle diameter;

• CV;

• Surface protrusion height;

• Coating thickness;

• Haze;

• Gloss;

• Transmission.

Best PMMA Microspheres for Korean Cosmetics

Strong suppliers include:

• Sunjin Beauty Science;

• Matsumoto Yushi-Seiyaku;

• Sekisui Kasei;

• Soken Chemical.

Sunjin has a particular advantage because of:

• Korean manufacturing;

• K-beauty formulation expertise;

• Local application support;

• Established polymer bead technology.

However, cosmetics require additional regulatory consideration because Korea restricts certain plastic microbeads used in cleansing and exfoliating products.

Best PMMA Microspheres for Porous Ceramics

Recommended manufacturers include:

• SANYU GROUP;

• Cospheric;

• Matsumoto;

• Soken Chemical;

• Lamberti.

PMMA particles can function as sacrificial pore formers.

The microspheres are blended into a ceramic or polymer precursor and removed during subsequent processing.

Particle size therefore strongly affects:

• Pore diameter;

• Pore distribution;

• Material permeability;

• Mechanical strength.

Best PMMA Microspheres for Calibration

Strong options include:

• microParticles GmbH;

• Cospheric;

• Bangs Laboratories;

• Polysciences.

Calibration applications require especially precise particle characterization.

Request:

• Actual mean diameter;

• Standard deviation;

• CV;

• Sphericity;

• Measurement method;

• Traceability where required.

Best PMMA Microspheres for Electronic Adhesives

Cospheric is particularly noteworthy because it provides silver-coated PMMA spacer beads.

These can help control adhesive bondline thickness while simultaneously providing electrical conductivity. (cospheric.com)

This can be relevant to:

• Displays;

• Electronic packaging;

• Precision assemblies;

• Conductive adhesives.

Best PMMA Supplier for Custom Sizes

SANYU is particularly competitive when buyers require:

• Nonstandard diameters;

• Crosslinked PMMA;

• Customized solids content;

• Powder or suspension;

• Customized packaging;

• OEM manufacturing.

microParticles, Sekisui and Soken also offer significant customization capabilities.

Pure PMMA vs PMMA-Based Acrylic Microspheres

Not every acrylic particle is chemically identical.

Pure PMMA

Pure PMMA generally provides:

• High optical transparency;

• Density around 1.19–1.20 g/cm³;

• Refractive index around 1.48–1.49;

• Predictable thermal behavior.

It may be preferred where optical or chemical properties must closely match PMMA reference values.

Crosslinked PMMA

Crosslinking creates a three-dimensional polymer network.

Compared with ordinary PMMA, crosslinked microspheres generally provide greater:

• Solvent resistance;

• Mechanical strength;

• Dimensional stability;

• Shape retention.

Crosslinked PMMA may therefore be preferred for:

• Solvent-based coatings;

• Optical films;

• Anti-blocking additives;

• Mechanical spacers;

• Advanced materials.

Highly Crosslinked PMMA

Highly crosslinked grades can provide even greater chemical resistance.

SANYU, for example, publishes PMMA products produced with approximately 50% EGDMA as the crosslinking monomer. (nanomicronspheres.com)

However, higher crosslinking can also alter:

• Thermal decomposition;

• Swelling;

• Burnout characteristics.

Therefore, the highest crosslink density is not automatically the best choice.

How to Select PMMA Microsphere Particle Size

Particle diameter is one of the most important specifications.

Below 1 µm

Submicron PMMA particles may be useful for:

• Advanced optical systems;

• Fine coatings;

• Surface modification;

• Biomedical research;

• Fine pore formation.

Soken and microParticles are particularly strong in this size range.

1–10 µm

This is one of the most versatile ranges.

Applications include:

• Optical films;

• Coatings;

• Cosmetics;

• Calibration;

• Polymer modification.

Sunjin's 7 µm PMMA products fall within this region, while Sekisui, Soken, SANYU and microParticles offer additional options. (sunjinbs.co.kr)

10–100 µm

Applications include:

• Coating texture;

• Anti-blocking;

• Ceramic porogens;

• Polymer composites;

• Precision spacing.

Lamberti offers seven Spheromers PMMA grades between approximately 6 and 60 µm. (polymerbeads.lamberti.com)

Above 100 µm

Large PMMA particles may be useful for:

• Large pore formation;

• Sacrificial templates;

• Research model particles;

• Precision spacers.

Cospheric offers PMMA particles extending to approximately 3.5 mm, while SANYU publishes crosslinked grades at 200, 400, 600 and 900 µm. (cospheric.com)

Monodisperse vs Broad-Distribution PMMA Microspheres

Monodisperse PMMA

Monodisperse microspheres are especially valuable for:

• Optical applications;

• Calibration;

• Precision spacing;

• Controlled pore formation;

• Microfluidics.

microParticles publishes PMMA products with CV below 5%.

Lamberti's Spheromers main peak typically has a CV of approximately 1–3%. (microparticles.de)

Broad-Distribution PMMA

A broader distribution can be suitable when:

• Exact particle size is less important;

• Surface texture is required;

• Multiple pore sizes are acceptable;

• Cost matters more than precision.

Polysciences, for example, supplies broad-distribution PMMA products around 1–10 µm. (polysciences.com)

Critical PMMA Microsphere Specifications Korean Buyers Should Compare

Mean Particle Diameter

Do not qualify particles using only the catalog's nominal value.

Request:

• Mean diameter;

• D10;

• D50;

• D90.

Particle-Size Distribution

Size distribution influences:

• Optical scattering;

• Coating texture;

• Calibration accuracy;

• Pore structure;

• Dispersion behavior.

Coefficient of Variation

CV is particularly useful when comparing monodisperse particles.

Lower CV generally means tighter particle uniformity.

Sphericity

Request SEM or microscopy images.

Look for:

• Irregular particles;

• Agglomerates;

• Broken spheres;

• Satellite particles.

Polymer Composition

Confirm whether the particle is:

• Pure PMMA;

• PMMA crosspolymer;

• PMMA copolymer;

• Other acrylic polymer.

This distinction is especially important for optical design and regulated formulations.

Crosslink Density

Crosslinking affects:

• Solvent resistance;

• Mechanical properties;

• Swelling;

• Heat resistance;

• Thermal decomposition.

Refractive Index

Refractive index is extremely important for Korea's display and optical-material industries.

Standard PMMA is typically around 1.48–1.49.

Sekisui publishes approximately 1.49 for standard PMMA and offers customized SSX refractive indices up to approximately 1.59. (tech-p.com)

Residual Monomer

Residual MMA may be particularly important for:

• Cosmetics;

• Biomedical materials;

• Sensitive optical formulations.

Ask for an appropriate testing method and specification.

Solids Concentration

For aqueous suspensions, confirm:

• Percentage solids;

• pH;

• Surfactant;

• Preservative;

• Suspension medium.

Thermal Decomposition

For porogen applications, request:

• TGA data;

• Decomposition temperature;

• Residual ash;

• Heating profile.

Korea-Specific PMMA Microsphere Applications

Displays and OLED Materials

Korea remains one of the world's leading display manufacturing centers.

Invest Korea highlights Samsung Display and LG Display as major panel manufacturers and identifies numerous Korean material and optical-film suppliers in the domestic ecosystem. (ombudsman.kotra.or.kr)

PMMA particles can be relevant to:

• Light diffusion;

• Anti-glare coatings;

• Optical films;

• Surface texturing;

• Spacer materials.

Coatings

PMMA microspheres may function as:

• Matting agents;

• Texture modifiers;

• Scratch-resistance additives;

• Optical modifiers.

Crosslinked PMMA is often particularly useful in solvent-rich coating systems.

Electronics

Possible applications include:

• Precision spacers;

• Conductive adhesive particles;

• Polymer fillers;

• Microelectronics research.

Cosmetics and K-Beauty

PMMA particles have historically been used in cosmetics for:

• Silky feel;

• Soft focus;

• Oil absorption;

• Spreadability;

• Pore-blurring effects.

Sunjin's PMMA technology is particularly relevant to this category.

However, Korean cosmetic regulations require additional attention.

Korea Cosmetic Microbead Regulations

South Korea restricts the use of certain plastic microbeads in cosmetics.

Korean regulatory guidance identifies microplastics used in products for cleansing or exfoliation as prohibited cosmetic ingredients where they are solid plastic particles 5 mm or smaller remaining in those products. (law.go.kr)

Government information states that plastic microbeads used in products such as scrubs and facial cleansers have been prohibited since July 2017. (korea.kr)

This should not be interpreted to mean that every PMMA microsphere used in every Korean application is prohibited.

The regulatory treatment depends on:

• Product category;

• Intended function;

• Particle use;

• Applicable cosmetic ingredient rules.

Korean cosmetic manufacturers should verify the current MFDS requirements for their specific formulation.

K-REACH Considerations for PMMA Microsphere Imports

Companies importing chemical substances into Korea may also need to consider the Act on Registration and Evaluation of Chemicals, commonly called K-REACH.

The Korea Testing & Research Institute explains that registration and notification requirements depend on factors including:

• Substance status;

• Annual tonnage;

• Hazard classification;

• Applicable exemption.

For phase-in substances, KTR currently lists registration grace periods including:

• 10–100 tonnes per year: through December 31, 2027;

• 1–10 tonnes per year: through December 31, 2030. (reach.ktr.or.kr)

KTR also identifies low-concern polymers among categories that may be considered for registration exemption procedures. (reach.ktr.or.kr)

However, a buyer should not assume that every PMMA microsphere automatically qualifies for exemption.

The importer should determine:

• Exact chemical identity;

• Polymer composition;

• Additives;

• Annual import volume;

• Applicable exemption criteria;

• Notification or registration status.

Korean regulatory specialists or KTR should be consulted where necessary.

How Korean Companies Should Qualify a PMMA Microsphere Supplier

Step 1: Define the Final Application

Determine whether the PMMA particle is intended for:

• Optical diffusion;

• Anti-glare;

• Matting;

• Anti-blocking;

• Porogen use;

• Cosmetics;

• Calibration;

• Precision spacing.

Step 2: Define Critical Specifications

Establish requirements for:

• Material;

• Diameter;

• CV;

• Sphericity;

• Crosslinking;

• Refractive index;

• Residual monomer.

Step 3: Screen Multiple Sizes

Do not assume one nominal diameter will automatically perform best.

For example, an optical-material developer might compare:

• 3 µm;

• 5 µm;

• 10 µm.

A ceramic developer might compare:

• 30 µm;

• 50 µm;

• 100 µm.

Step 4: Test in the Actual Formulation

Supplier specifications alone cannot predict final performance.

Test the particles in the real:

• Optical resin;

• Coating;

• Film;

• Ceramic slurry;

• Cosmetic formulation.

Step 5: Compare Multiple Suppliers

Use identical formulation and test conditions.

Evaluate both:

• Performance;

• Cost.

Step 6: Compare Multiple Lots

Commercial qualification should involve several independent manufacturing lots.

Step 7: Perform Stability Testing

Evaluate:

• Storage;

• Sedimentation;

• Dispersion;

• Heat exposure;

• Transportation conditions.

Step 8: Review Documentation

Request:

• TDS;

• SDS;

• CoA;

• Particle-size report;

• SEM images;

• Polymer composition;

• K-REACH information;

• Residual monomer data.

Step 9: Scale Up

Compare performance from:

• Laboratory sample;

• Pilot quantity;

• Commercial quantity.

Step 10: Qualify a Second Source

Second sourcing can reduce risk from:

• Logistics disruption;

• Production interruption;

• Product discontinuation;

• Capacity shortages;

• Price increases.

However, replacing one PMMA microsphere with another may change final-product performance.

Equivalence testing is therefore necessary.

PMMA Microsphere RFQ Checklist for Korean Buyers

Provide the following information when requesting a quotation.

Material: Pure PMMA, crosslinked PMMA or acceptable acrylic copolymer.

Application: Display, optical film, coating, ceramic, cosmetic, calibration or another application.

Nominal diameter: Required particle size.

Particle-size distribution: Monodisperse or broad distribution.

Maximum CV: Required value where applicable.

Sphericity: Minimum requirement.

Crosslinking: Non-crosslinked, crosslinked or supplier recommendation.

Crosslink monomer: Specify where important.

Refractive index: Required for optical systems.

Surface chemistry: Plain or functionalized.

Format: Dry powder or aqueous suspension.

Solids concentration: Required percentage.

Residual MMA: Maximum acceptable level if relevant.

Thermal properties: Required for porogen applications.

Sample quantity: Initial evaluation amount.

Pilot quantity: Validation quantity.

Annual demand: Estimated commercial requirement.

Packaging: Laboratory, kilogram or industrial packaging.

Required documents: TDS, SDS, CoA, SEM and particle-size data.

K-REACH: Request relevant chemical compliance information.

Destination: Republic of Korea.

Customization: Particle size, crosslinking, surface chemistry, concentration or packaging.

Frequently Asked Questions About PMMA Microspheres in Korea

What Are PMMA Microspheres?

PMMA microspheres are spherical particles manufactured primarily from poly(methyl methacrylate).

They are also called:

• PMMA particles;

• Acrylic microspheres;

• PMMA beads;

• Acrylic beads.

Are PMMA Microspheres the Same as Acrylic Microspheres?

Not always.

PMMA is one type of acrylic polymer.

Some acrylic particles contain different methacrylates or acrylic copolymers.

Always confirm composition.

Is There a PMMA Microsphere Manufacturer in Korea?

Yes.

Sunjin Beauty Science is a Korean manufacturer with polymer bead technologies and an established SUNPMMA product family.

Its product literature includes 100% PMMA grades at approximately 7, 13 and 25 µm. (sunjinbs.co.kr)

Which Manufacturer Is Best for Korean Cosmetics?

Sunjin Beauty Science has the strongest local advantage because of its Korean cosmetic-ingredient manufacturing and formulation expertise.

Matsumoto, Sekisui and Soken also offer PMMA products relevant to cosmetic applications.

Which Manufacturer Is Best for Korean Display Materials?

Sekisui Kasei and Soken Chemical are particularly strong because their PMMA particle platforms are directly targeted toward:

• Displays;

• Light diffusion;

• Optical sheets;

• Anti-glare films.

SANYU and Lamberti provide additional alternatives.

Which Manufacturer Is Best for Custom PMMA Microspheres?

SANYU is particularly useful when customized particle diameter, crosslinking, packaging or concentration is required.

microParticles, Sekisui and Soken also provide significant customization capabilities.

Which Manufacturer Has the Broadest PMMA Size Range?

Cospheric offers one of the broadest standard PMMA ranges, extending from approximately 1 µm to 3.5 mm. (cospheric.com)

SANYU also offers a broad range of custom and standard particle sizes extending into hundreds of micrometers.

Which Manufacturer Is Best for Monodisperse PMMA?

Strong options include:

• microParticles GmbH;

• Lamberti;

• Sekisui Kasei;

• SANYU GROUP.

Which Manufacturer Is Best for Calibration?

microParticles GmbH and Cospheric are particularly strong choices.

Bangs Laboratories and Polysciences are also suitable for research and analytical applications.

Which Manufacturer Is Best for Porogens?

SANYU and Cospheric provide particularly broad particle-size options.

Soken, Matsumoto and Lamberti also offer PMMA technologies relevant to pore formation.

Which PMMA Microspheres Are Best for Light Diffusion?

The correct microsphere depends on the refractive index of the base polymer.

Sekisui, Soken and Lamberti offer particularly strong optical particle platforms.

Particle diameter and loading should be optimized experimentally.

Is Crosslinked PMMA Better Than Ordinary PMMA?

Not necessarily.

Crosslinked PMMA generally provides improved:

• Solvent resistance;

• Mechanical strength;

• Dimensional stability.

Non-crosslinked PMMA may be preferable when:

• Easier dissolution is required;

• Thermal removal is important;

• Standard thermoplastic behavior is desired.

Are PMMA Microspheres Banned in Korean Cosmetics?

Korean regulations prohibit certain solid plastic microbeads 5 mm or smaller when used in cleansing or exfoliating cosmetic products. (law.go.kr)

This should not be generalized into a statement that all PMMA particles are prohibited in every cosmetic or industrial use.

The exact finished product and intended function must be assessed.

Does K-REACH Apply to Imported PMMA Microspheres?

Potentially.

The applicability depends on the exact material, annual tonnage and exemption status.

Some low-concern polymers may qualify for exemption procedures, but importers should verify the requirements rather than assuming an automatic exemption. (reach.ktr.or.kr)

Final Recommendations

The PMMA microsphere market serving Korea includes a Korean cosmetic polymer-bead manufacturer, Japanese optical-particle specialists, European monodisperse microsphere manufacturers, American precision-particle companies and international custom suppliers.

Sunjin Beauty Science ranks first because it provides a locally manufactured PMMA bead platform combined with strong K-beauty formulation expertise and direct Korean technical support.

SANYU GROUP ranks second and is the only Chinese manufacturer included. Its strengths include highly crosslinked PMMA microspheres, broad particle-size options, powder and suspension formats, customized manufacturing, OEM supply and flexible packaging.

Sekisui Kasei ranks third because its TECHPOLYMER platform provides non-crosslinked, crosslinked and monodisperse PMMA materials with particularly strong relevance to Korea's display, LED and optical-material industries.

Soken Chemical & Engineering ranks fourth because of its highly developed PMMA particle technologies for optical diffusion sheets, anti-glare films, coatings and submicron applications.

Matsumoto Yushi-Seiyaku ranks fifth with crosslinked and non-crosslinked PMMA particles offering different surface morphologies and solvent resistance.

microParticles GmbH ranks sixth for its highly monodisperse 100 nm–200 µm PMMA platform and extensive particle characterization.

Cospheric ranks seventh because of its exceptionally broad PMMA size range and specialty silver-coated PMMA particles for conductive spacer applications.

Lamberti / Microbeads ranks eighth with industrial-scale monosized crosslinked PMMA microspheres for light diffusion, anti-blocking and coatings.

Polysciences ranks ninth as an accessible source of PMMA microspheres for biomedical and materials research.

Bangs Laboratories ranks tenth because of its specialist microsphere expertise and value in calibration, diagnostics and custom research projects.

For Korean buyers, the most important supplier-selection criteria include:

• Exact polymer composition;

• Mean particle diameter;

• Particle-size distribution;

• Sphericity;

• Crosslink density;

• Refractive index;

• Thermal stability;

• Residual monomer;

• Dispersion behavior;

• Lot-to-lot consistency;

• K-REACH documentation;

• Customization capability;

• Production capacity;

• Technical support;

• Commercial lead time.

For display and optical applications, refractive index and particle-size control should receive particularly high priority.

For cosmetic applications, sensory performance must be considered together with Korea's microbead restrictions and global microplastic-free trends.

For ceramic and advanced-material applications, particle diameter, crosslinking and thermal decomposition become more important.

The best PMMA microsphere manufacturer is ultimately the supplier that can consistently deliver the required particle properties while supporting the customer's technical, regulatory and commercial requirements in Korea.