Description: M2946 is an open cell polyether polyurethane foam. This open cell sponge is often referred to as poly foam and has a wide range of uses. M2946 and its family have been specially developed for airborne sound absorption. Its cell structure absorbs and transforms sound waves into heat through vibration, permanently lowering the noise. This foam has a uniform cell structure. M2946 meets the FMVSS-302 Flammability rating, and the UL 94 HF1 flame rating.
These attributes allow M2946 to be used in many applications such as automotive panels, industrial machinery, HVAC ducts, marine sound attenuation, and household appliances. M2946 is also used in gasketing applications as a dust seal or as a vibration/rattle seal for access panels or doors.
M2946 has an Indentation Force Deflection @ 25% of 35 lbs./50 in² making it a soft-medium range polyurethane foam. Other grades can be softer or firmer, depending on application. All polyurethane open cell foam products can be supplied with or without adhesive backing in full rolls up to 60" wide, or slit rolls as narrow as ¼". We can also die cut or waterjet cut parts to your exact specifications.
|Physical Properties||Test Values|
|Density||2 ± 10% lbs./ft.3||32 ± 10% kg/M3|
|Tensile Strength||15 psi||20 psi||103 kPa||138 kPa|
|Indentation Force Deflection|
|25% Deflection||26 lbs./50 in.2||35 lbs./50 in.2||116 N/323 cm2||156 N/323 cm2|
|25% Deflection||50 lbs./50 in.2||70 lbs./50 in.2||222 N/323 cm2||311 N/323 cm2|
|Retention of Tensile Strength after
5 hours, 248°F, steam autoclave
This information is for reference only. Atlantic Gasket shall not be held responsible for its content or use. It is the customer’s responsibility to obtain and test samples to determine the suitability of a material for a specific application.
Click here to download a specification Word document.