300um Spacer PMMA Microspheres PAPMMA300UM 10%

300um Spacer PMMA Microspheres PAPMMA300UM

SHBC PAPMMA300UM are precision 300 μm PMMA microspheres designed for adhesive bond-line control, large-gap spacing and precision component assembly.

The spherical polymer particles provide physical support between assembled surfaces. They are suitable for adhesives, optical components, sensors, electronic modules and industrial assemblies.

Product Specifications

Batch-specific particle size distribution, solid content, supply form, packaging and storage conditions are available in the product specification and Certificate of Analysis.

Key Advantages

Controlled 300 μm Spacing

The nominal particle diameter helps maintain an approximately 300 μm gap between bonded surfaces.

Uniform Spherical Morphology

Regular spherical particles provide stable support points and help reduce local bond-line variation.

Controlled Particle Sizing

Consistent particle sizing supports repeatable gap and adhesive-thickness control.

PMMA Polymer Material

PMMA provides a lightweight polymer spacer option for adhesive, optical and electronic systems.

Smooth Particle Surface

The smooth morphology supports distribution in compatible adhesives, sealants, coatings and resins.

Custom and Bulk Supply

SHBC supports laboratory samples, customized specifications, pilot orders and bulk production.

Main Applications

Adhesive Bond-Line Control

PAPMMA300UM can be mixed into compatible adhesives or sealants to help maintain an approximately 300 μm bond line.

Optical Component Assembly

Suitable for spacing between glass substrates, lenses, filters, optical housings and imaging components.

Camera and Imaging Modules

Can help control adhesive thickness and component spacing in selected camera and optical assemblies.

Sensor Manufacturing

Suitable for controlling separation between substrates, electrodes, housings and sensor components.

Electronic Module Assembly

Can be evaluated for bonding circuit components, substrates, modules and enclosures.

Semiconductor Packaging

Suitable for selected packaging systems requiring controlled spacing between substrates and components.

Industrial Precision Assembly

Can be used in fixtures, mechanical parts and industrial components requiring repeatable separation.

How 300um PMMA Spacer Microspheres Work

PAPMMA300UM microspheres are dispersed in an adhesive, sealant, coating or compatible carrier.

During assembly, the particles form physical support points between two surfaces. Their nominal diameter helps limit excessive compression and maintain the required separation.

The final gap may also depend on:

• Mean particle diameter

• Maximum particle diameter

• Particle size distribution

• Particle loading

• Adhesive viscosity

• Dispersion uniformity

• Assembly pressure

• Substrate flatness

Product Benefits

PAPMMA300UM helps provide:

• Controlled 300 μm spacing

• More uniform bond-line thickness

• Stable support-point distribution

• Reduced local gap variation

• Improved component alignment

• Repeatable assembly performance

• Customized specifications

• Reliable industrial supply

Application Methods

Adhesive Mixing

Mix the microspheres into compatible epoxy, acrylic, UV-curable adhesive, silicone or sealant systems.

Wet Dispersion

Disperse the particles in a compatible liquid carrier before coating or application.

Surface Distribution

Apply the microspheres to the substrate using suitable precision distribution equipment.

Resin and Coating Formulation

Incorporate PAPMMA300UM into compatible resin, coating or composite systems requiring controlled spacing.

Dispersion and Processing Guide

Uniform particle distribution is important for consistent gap control.

Recommended processing considerations include:

• Confirm material compatibility

• Premix before application

• Use gentle mechanical stirring

• Minimize bubbles and air introduction

• Avoid particle aggregation

• Evaluate particle settling

• Maintain consistent assembly pressure

• Validate the final bond-line thickness

The dispensing nozzle, pump and material path should be sufficiently larger than 300 μm to reduce blockage risk.

Particle Loading Considerations

The recommended loading depends on the bonding area, adhesive volume and required support-point density.

Insufficient loading may result in uneven spacing. Excessive loading may affect adhesive flow, dispensing performance or bond strength.

Evaluate:

• Particle dispersion

• Support-point density

• Particle settling

• Adhesive viscosity

• Dispensing stability

• Final gap thickness

• Bond strength

• Long-term compatibility

Process validation is recommended before production use.

PMMA vs. Inorganic Spacer Particles

PMMA microspheres provide a polymer-based alternative to rigid glass or silica spacer materials.

They can be considered when the application requires:

• Lower particle density

• Polymer-system compatibility

• Reduced contact hardness

• Limited deformation under pressure

• Customized particle dimensions

• Dry powder or suspension supply

Mechanical, thermal and chemical compatibility should be confirmed in the final application.

How to Select PAPMMA300UM

Consider the following factors:

• Target gap thickness

• Mean particle diameter

• Maximum particle diameter

• Particle size tolerance

• Particle size distribution

• Adhesive chemistry

• Adhesive viscosity

• Dispensing method

• Assembly pressure

• Operating environment

For strict bond-line control, both mean diameter and maximum particle diameter should be evaluated.

Custom PMMA Spacer Microspheres

SHBC can customize PMMA spacer microspheres according to project requirements.

Customization options may include:

• Custom particle diameter

• Particle size tolerance

• Particle size distribution

• Crosslinking level

• Solid content

• Dispersion medium

• Surface modification

• Dry powder or suspension

• Custom packaging

• OEM and ODM supply

Please provide the target gap, adhesive system, application and required quantity when requesting customization.

Quality Control and Documents

Available product documents may include:

• Certificate of Analysis

• Technical Data Sheet

• Safety Data Sheet

• Particle size test report

• Particle size distribution data

• Microscopy images

• Batch inspection record

• Customized specification sheet

Why Choose SHBC?

Shanghai SanYu Biotechnology Co., Ltd. supplies polymer microspheres, silica microspheres, magnetic beads and functional particle materials.

SHBC provides:

• Precision microsphere manufacturing

• Stable batch-to-batch quality

• Multiple particle-size options

• Customized specifications

• Sample evaluation support

• Pilot-scale production

• Bulk manufacturing capability

• OEM and ODM services

Frequently Asked Questions

What are PAPMMA300UM microspheres?

PAPMMA300UM are nominal 300 μm PMMA microspheres designed for large-gap and bond-line thickness control.

What are 300um PMMA spacer microspheres used for?

They can be evaluated for adhesives, optical components, camera modules, sensors, electronic packaging and industrial assemblies.

Can PAPMMA300UM create an exact 300 μm gap?

The nominal particle diameter helps control the gap. Final thickness also depends on particle size distribution, maximum diameter, loading, adhesive properties and assembly pressure.

Can PAPMMA300UM be mixed into epoxy adhesives?

Yes. They can be evaluated in compatible epoxy, acrylic, UV-curable adhesive, silicone and sealant systems.

Why use PMMA spacer particles?

PMMA provides a lightweight polymer spacer option with lower contact hardness than many rigid inorganic particles.

How should PAPMMA300UM be dispersed?

Use gentle mechanical stirring while minimizing bubbles, particle aggregation and settling.

Can the particles pass through dispensing equipment?

The nozzle and complete material path must be larger than the particle diameter. Equipment compatibility should be confirmed before use.

Will the particles affect adhesive performance?

Particle loading and dispersion may affect adhesive viscosity, dispensing and bond strength. Compatibility testing is recommended.

Can SHBC customize PAPMMA300UM?

Yes. Particle diameter, size tolerance, crosslinking level, solid content, supply form and packaging can be customized.

Are samples and bulk quantities available?

Yes. SHBC supports laboratory samples, pilot orders and long-term bulk supply.

Request a Sample or Quotation

Contact SHBC for PAPMMA300UM samples, technical specifications, customized PMMA spacer microspheres and bulk pricing.

Please provide:

• Target application

• Required gap thickness

• Adhesive or carrier system

• Required quantity

• Preferred supply form

• Packaging requirements

• Estimated annual demand

Product: 300um Spacer PMMA Microspheres
Catalog Number: PAPMMA300UM
Material: Polymethyl Methacrylate, PMMA
Nominal Particle Size: 300 μm
Brand: SHBC
Manufacturer: Shanghai SanYu Biotechnology Co., Ltd.