Technical Data


MC&S Brand Porous Structures are porous engineering materials consisting of tiny, precisely-sized spherical particles bonded together to form rigid three-dimensional shapes having an evenly distributed network of interstitial pores which are of uniform size, completely open and interconnected.  Porous structures are manufactured using a patented process, which permits the exact reproduction of specified pore size, pore distribution and physical dimensions, regardless of quantity ordered over time.


MC&S Brand Porous Structures are ideally suited for a wide variety of applications involving filtration, aeration, oxygenation and fluidization — to name a few.  They are intended for use wherever high rates of gas transfer into liquids, low back pressure, precisely controlled/evenly distributed flow rates or other desirable performance characteristics of uniform porosity are required.


MC&S Brand Porous Structures are immediately available in flat sheets, hollow tubes, solid rods and an almost limitless variety of simple or complex/compound custom molded shapes to meet your design specifications.  The following standard grades are normally stocked.  Grade designations used to identify MC&S Brand Porous Structures also denote the maximum interstitial pore diameter in microns (ASTM 128-61).  Coarser and finer grades available upon request from MC&S:


15 Very Fine
40 Fine
55 Intermediate
90 Coarse
175 Very Coarse


  1. Particle Retention (as filter medium)
    Grade Absolute Nominal
    15 15 8
    40 40 20
    55 55 28
    90 90 45
    175 175 90
  2. Flexural Strength — (ASTM D-790)
    From 1,500 to 4,500 psi depending upon Grade.
  3. Compressive Strength — (ASTM D-695)
    From 3,000 to 9,000 psi depending upon Grade.
  4. Void Volume — 30%
  5. Heat Resistance
    250°F Continuous, 450°F Maximum
    (May be Autoclaved)
  6. Coefficient of Thermal Expansion
    10.8 x 10-6 in./in.*°C from 0-400°F
  7. Dielectric Strength
    From 49 V/mil to 73 V/mil depending upon Grade.
  8. Bulk Density — (ASTM C-20-73)
    1.6 grams/cc
  9. Chemical Resistance
    No effect after 2 years immersion at 73°F in a wide variety of solutions.