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Commercial foam rubbers are generally made of synthetic rubber, natural latex or polyurethane. Latex foam rubber, used in mattresses, is well known for its endurance.
Foam rubber is found in a wide range of applications, from furniture cushions and bedding to automobile seats and insulation in walls and appliances to soundproofing and heels in footwear.
Foamrubber.com is here to help you select the right kind of foam for you.
Latex foam is derived from the rubber tree, it is naturally resilient and supportive. It lasts much longer than other foams, and is resistant to dust mites, mold, mildew, and bacteria. Talalay latex does not trigger latex allergies.
Polyurethane foam is the most common kind of foam in traditional mattresses. Its chief attribute is its low cost, but high-resiliency polyurethane foam can last 10 years or so, depending on the type.
Memory foam, also known as Viscoelastic foam. A special type of polyurethane foam developed by NASA to cushion astronauts in flight. Heat-sensitive, it provides support and relieves pressure by conforming to your body shape.
Density: In high-density foam, cells are typically packed more tightly together, so foam withstands repeated compressions better. Look for foam of at least 3 lb. per cubic foot. Talalay latex foam is 5 lb. per cubic foot and is said to last 20 years or more.
Firmness is unrelated to density. Low-density foam may feel firm at first, but will break down relatively quickly. Firmness is measured in ''indentation load deflection.'' For firm support, try foam with an ILD of 30 or higher. Medium firmness is 25 to 29 ILD.
Foam rubber can be open-or-closed cell. Closed-cell foam is often used in flotation equipment and marine products, because it does not soak up water. Open-cell foam is usually a softer material where the bubbles (or 'cells') are broken, allowing air to move easily through all the spaces of the material when the foam is squeezed or compressed.