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microporous insulation materials

microporous insulation materials

Microporous insulation are composite materials in the form of compacted powder or fibers with an average interconnecting pore size comparable to or below the mean free path of air molecules at standard atmospheric pressure. Microporous insulation may contain opacifiers to reduce the amount of radiant heat transmitted.

Microporous Insulation Materials are most often used where a maximum amount of thermal resistance is needed with minimal thickness and weight. Typical applications include piping and equipment operating at temperatures above 250°F, tanks, vessels, heat exchangers, valve and fitting insulation, exhaust ducts, electronic instruments, and fire protection.

Microporous insulation features

  • Low thermal conductivity and low thermal mass for effective energy savings in thermal applications
  • Wide range of thicknesses, shapes, facings and encapsulations ensure optimal solutions for all applications
  • Microporous material is easy to machine to size and shape for efficient installation even in awkward spaces 

Thermal conductivity

Microporous Insulation Materials are known worldwide for their very low thermal conductivity (λ) values across a wide temperature range. As exposure temperature increases, the difference in λ value between microporous and conventional insulation materials increases dramatically due to the inability of most insulations to block IR radiation. The consistently low thermal conductivity over all exposure temperatures explains why the use of microporous insulation materials are more easily justify ed at higher temperatures.

Classification temperatures

Microporous Insulation materials of MMTCL are able to vary key performance characteristics to meet the demands of a wide range of challenging applications. Requirements such as temperature capability, water resistance, and compression resistance can all be modify ed when necessary.

Compressive strength

The Comperssive strength of MMTCL‘s microporous materials on the material grade and the density. Their products are often successfully used in applications where high pressures occur, for example back-up insulation in steel ladles.


As with all insulation materials, a small amount of irreversible lateral shrinkage will occur during exposure above the maximum rated temperature limit. As the temperature increases, the particles of silica begin to sinter and fuse together, changing the nature of the structure and increasing the solid conduction component of heat transfer. With MMTCL‘s microporous materials shrinkage is extremely slight and rarely has any influence on the effective performance. Microporous products can be used at their continuous maximum temperature, and this for a very long time! Because of the inorganic character of the material the thermal shrinkage is minimal, and the lifetime maximal. 

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