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Microspheres for automotive polymers and compounds

Hollow aluminosilicate microspheres can be evaluated as a lightweight mineral filler in polymers, compounds and composites used in the automotive supply chain. Results depend on matrix, dosage, grading and processing conditions.

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Automotive polymer composite trial using SPHERON microspheres
Automotive

The role of microspheres in the formulation

Link particle-size selection to component or layer thickness, required surface appearance and dosing-equipment clearance. The A and E series also allow a lighter and a grey colour profile to be compared within documented density ranges.

The presence of microspheres alone does not establish stiffness, impact resistance or acoustic performance of the finished component. Measure density, viscosity and dispersion, then validate mechanical properties, surface, emissions and durability against the component specification.

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Recommended starting products

The final grade must be validated in the target formulation and process. These products provide a practical starting point for trials.

SPH-200E — 63–200 µm
Series E
Aluminosilicate microsphere

SPH-200E — 63–200 µm

A controlled 63–200 µm E-series grade with a concentrated fine-to-medium particle-size distribution for coatings and composites.

Why this grade

The controlled 63–200 µm range and 0.35–0.44 g/cm³ bulk density provide a starting point for trials with fewer very fine particles.

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SPH-150E — 0–150 µm
Series E
Aluminosilicate microsphere

SPH-150E — 0–150 µm

A fine 0–150 µm E-series grade for formulations where a smaller maximum particle size is required.

Why this grade

The 0–150 µm range and 0.36–0.44 g/cm³ bulk density allow the grey E-series option to be compared in the same particle class.

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SPH-300A — 0–300 µm
Series A
Aluminosilicate microsphere

SPH-300A — 0–300 µm

A versatile 0–300 µm A-series grade with a white to light grey color profile.

Why this grade

The 0–300 µm range and 0.36–0.42 g/cm³ bulk density allow a broader grade to be assessed in thicker compounds and components.

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SPH-150A — 0–150 µm
Series A
Aluminosilicate microsphere

SPH-150A — 0–150 µm

A fine 0–150 µm A-series grade for formulations requiring a smaller maximum particle size and lighter color.

Why this grade

The 0–150 µm range, light colour profile and 0.36–0.44 g/cm³ bulk density suit trials in fine, surface-sensitive compounds.

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