45S5 microspheres: consistency improvements for flow and packing

Microspheres can look “the same” in a brochure but behave very differently on a production line. We recently refined our classification and handling steps to improve flowability and packing behavior for 45S5 microspheres used in fillers and composite systems.

Below is a practical summary for customers who are qualifying materials or running an OEM program. If you need a specific document package, tell us your stage (evaluation vs production) and your target spec.

The problem we see in real projects

• Bridging and inconsistent feeding when PSD is too wide or when fines drift upward lot-to-lot.
• Packing variability in molds or cartridges, which can show up as density differences in downstream processing.
• Moisture sensitivity during storage/handling leading to clumping.

If any of the points above maps to your current bottleneck, we can suggest a grade and the minimum documentation set that keeps the project moving.

What changed in our process

• Tighter classification windows where customers need stable flow behavior.
• More consistent screening of fines (application-dependent).
• Packaging/handling emphasis on keeping the material dry and clean.

If any of the points above maps to your current bottleneck, we can suggest a grade and the minimum documentation set that keeps the project moving.

How to write a practical microsphere spec

• Define the PSD window you actually need (and the measurement method).
• Call out acceptable fines content if feeding/flow matters in your process.
• State packaging size and moisture protection expectations.

If any of the points above maps to your current bottleneck, we can suggest a grade and the minimum documentation set that keeps the project moving.

When to talk to us

• If you are blending microspheres into polymers or pastes and see feeding instability.
• If you need a microsphere grade matched to a target packing density.
• If you want to compare micro powder vs microspheres for a specific formulation.

If any of the points above maps to your current bottleneck, we can suggest a grade and the minimum documentation set that keeps the project moving.

Quick request template

Product(s):
Target PSD range + method:
Application (R&D / pilot / production):
Quantity + timeline:
Documentation needed (typical / full COA / trace elements / other):

Contact: info@kannrybio.com