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Mechanical Properties

Mechanical Properties Highly effective reinforcement additive solutions

Imerys has the widest portfolio of engineered minerals which are ideally suited to boost the mechanical properties of adhesives. Engineered minerals are found to impart the best performance balance in terms of elongation, tensile, tear and flexion strength.

Calcium carbonate

Calcium carbonates are cost-effective solutions for improving mechanical properties as they can be used at filler levels of up to 60% allowing cost savings in formulations.  To maintain the mechanical requirement a careful choice of filler is necessary.

Example of a silane-terminated hybrid polymer formulation with 40% PCC loading


The acicular (needle) structure of wollastonite makes it a highly effective reinforcement additive agent where it provides:

  • Improved tensile, tear and dimensional strength
  • Higher peel and lap shear adhesion
  • Enhanced cohesion strength

High aspect ratio Aspect® and fine Nyglos® wollastonites are commonly recommended for improving mechanical properties of structural, high-temperature, pressure sensitive, hot melt, plastisol and thermally and UV curable adhesives and sealants.


We offer a full range of custom formulation and technical and process support services to help you match the right mineral grade to your application requirement.

Please contact us, we will be only too happy to help

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Adhesives, Caulks & Sealants