700um Spacer PS Microspheres PAPS700UM

700um Spacer PS Microspheres PAPS700UM

SHBC PAPS700UM are 700 μm polystyrene microspheres developed for large-gap control, bond-line thickness control and precision component spacing.

The spherical polymer particles form physical support points between assembled surfaces. They can be evaluated in adhesives, sealants, optical assemblies, electronic modules and industrial components.

Product Specifications

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

Key Advantages

Controlled 700 μm Spacing

The nominal particle diameter helps maintain an approximately 700 μm separation between bonded surfaces.

Uniform Spherical Morphology

Regular spherical particles provide stable support points and help reduce local gap variation.

Controlled Particle Sizing

Consistent particle sizing supports repeatable thickness control and assembly performance.

Smooth Particle Surface

The smooth surface supports distribution in compatible adhesives, sealants, coatings and resin systems.

Large-Gap Spacer Option

PAPS700UM is suitable for applications requiring larger spacing than common small-particle spacer materials.

Custom and Bulk Supply

SHBC supports sample evaluation, customized specifications, pilot orders and bulk production.

Main Applications

Adhesive Bond-Line Control

PAPS700UM can be dispersed in compatible adhesives or sealants to help maintain an approximately 700 μm bond line.

Electronic Module Assembly

Suitable for controlling spacing between circuit boards, substrates, housings and supporting components.

Sensor and Enclosure Bonding

Can be evaluated in sensors, control units and electronic enclosures requiring controlled adhesive thickness.

Optical Component Assembly

Suitable for large-gap spacing between lenses, glass substrates, optical housings and imaging components.

Industrial Component Bonding

Used in fixtures, mechanical parts and industrial assemblies requiring repeatable separation.

Resin and Coating Thickness Control

Can serve as a physical spacer in compatible coatings, resins and composite material systems.

Prototype and Test Assemblies

Suitable for laboratory fixtures and product development projects requiring controlled large gaps.

How 700um Spacer Microspheres Work

PAPS700UM microspheres are distributed in an adhesive, coating or compatible carrier.

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

Final gap thickness may also depend on:

• Mean particle diameter

• Maximum particle diameter

• Particle size distribution

• Particle concentration

• Adhesive viscosity

• Assembly pressure

• Substrate flatness

Product Benefits

PAPS700UM helps provide:

• Controlled large-gap spacing

• More uniform bond-line thickness

• Stable support-point distribution

• Reduced local gap variation

• Improved component alignment

• Repeatable assembly processes

• Customized particle specifications

• Reliable industrial supply

Processing Recommendations

Disperse the microspheres evenly in the adhesive before dispensing or bonding.

Important processing factors include:

• Adhesive compatibility

• Particle loading

• Adhesive viscosity

• Mixing speed

• Dispensing equipment

• Material-path diameter

• Assembly pressure

• Support-point density

Use gentle mechanical mixing to minimize air and bubble formation.

The dispensing nozzle and material path must be sufficiently larger than 700 μm to reduce the risk of blockage.

Particle Loading Considerations

The appropriate particle concentration depends on the bonding area, adhesive volume and required number of support points.

Low loading may provide insufficient support. Excessive loading may affect adhesive flow, dispensing performance and bond strength.

Evaluate the following before production:

• Particle dispersion

• Particle settling

• Adhesive flow

• Dispensing stability

• Final gap thickness

• Bond strength

• Long-term compatibility

Process validation is recommended for each adhesive and assembly system.

How to Select PAPS700UM

Consider the following factors:

• Target gap thickness

• Mean particle diameter

• Maximum particle diameter

• Particle size tolerance

• Adhesive chemistry

• Adhesive viscosity

• Dispensing method

• Assembly pressure

• Operating environment

The maximum particle diameter should be evaluated when strict bond-line thickness control is required.

Custom Spacer Microspheres

SHBC can customize spacer microspheres according to project requirements.

Customization options may include:

• Custom particle diameter

• Particle size tolerance

• Particle size distribution

• Solid content

• Dispersion medium

• Surface treatment

• 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

• 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 particle manufacturing

• Stable 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 PAPS700UM microspheres?

PAPS700UM are nominal 700 μm polystyrene microspheres designed for large-gap and bond-line thickness control.

What applications are suitable for PAPS700UM?

They can be evaluated for adhesive bonding, electronic modules, optical components, sensors, enclosures and industrial assemblies.

Can PAPS700UM create an exact 700 μm gap?

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

Can PAPS700UM be added to epoxy adhesives?

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

Can the particles pass through dispensing equipment?

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

How much PAPS700UM should be added?

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

Will the particles affect adhesive performance?

Particle loading and dispersion may influence adhesive flow, dispensing and bond strength. Compatibility testing is recommended.

Can SHBC customize the particle size?

Yes. Particle diameter, tolerance, supply form, dispersion medium and packaging can be customized.

Are samples and bulk quantities available?

Yes. SHBC supports sample evaluation, pilot orders and long-term bulk supply.

Request a Sample or Quotation

Contact SHBC for PAPS700UM samples, technical specifications, customized 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: 700um Spacer PS Microspheres
Catalog Number: PAPS700UM
Material: Polystyrene, PS
Nominal Particle Size: 700 μm
Brand: SHBC
Manufacturer: Shanghai SanYu Biotechnology Co., Ltd.