Chemical and heat resistance

Chemical resistance of MEF

Thanks to its excellent chemical resistance, MEF can be used for a wide variety of applications.

Chemical Rating
Hydrochloric acid (10%)
Hydrochloric acid (36%)
Sulfuric acid (10%)
Sulfuric acid (30%)
Nitric acid (10%)
Nitric acid (40%)
Phosphoric acid
Boric acid
Potassium hydroxide (10%)
Sodium hydroxide (10%)
Calcium hydroxide (10%)
Hydrogen peroxide (3%)
Chemical Rating
Aqueous ammonia
Ethylene dioxide
Methyl acetate water
Ethyl alcohol
Chemical Rating
Gas oil
Fuel oil
Turpentine oil
Engine oil
Turbine oil
Linseed oil

Test method (ASTM D 543-56T)

The test piece (75 mm×25 mm×10 mm) is left immersed in various chemical products for 7 days in an atmosphere of 23°C and 50% RH. It is then removed from the chemical product and left at 35°C for 24 hours. The changes in dimensions and mass are then measured.


Rating Dimensional change rate (%) Chemical absorption rate (Vol %) Appearance
< 1 < 3 No change
1 〜 3 3 〜10 Little change
> 3 > 10 Swelling
× Dissolution or contraction

Comparison of chemical resistance

Chemical MEF Expanding polystyrene
Kerosene ×
Engine oil ×
Gasoline ×
Toluene ×
Trichloroethylene ×
Acetone ×
Methyl acetate ×
Ethyl alcohol
linseed oil ×

Cold resistance of MEF

Since the principal raw material used to make MEF is polyethylene, a foam product, resistance to cold is excellent.
Even at low temperatures, resistance to cracking and chipping is high.

Cold resistance of MEF<sup>™</sup>

Tensile elongation rate at low temperatures (-30℃)

Tensile elongation rate at low temperatures (-30℃)

Note: The values in this table are measurement results; they are not intended as specifications.