PBDE is not one chemical, but a group chemicals called polybrominated dibenzyl ethers. They are one of a group called brominated fire retardants (BFR) commonly used in the manufacture of plastics and rubbers to make them fire proof. They are becoming controversial because they may be toxic, particularly to children.
One thing to look out for in foam mattresses is the use of PBDE's. These are flame retardants used to compensate the fact the foam is highly flammable. PBDE's have been banned in Europe and are about to be banned in California. This is because PBDE's or PolyBrominated Diphenyl Ethers have been found in humans. These particles are like the PCB's that were banned a few decades ago. They have been found to accumulate in humans (and animals) and not break down. This has lead to concerns they might be carcinogenic. A pretty safe bet in avoiding PBDE's is buying organic or natural latex mattresses. Wool is also a natural flame retardant as so does not require PBDE's.
Kapaz PFC was created in 1959.
Sumgayit PFC was created in 2010.
AZAL PFC was created in 1996.
Simurq PFC was created in 2005.
PFC Oleksandria was created in 1991.
PFC Kom-Minyor was created in 1957.
PFC Akademik Sofia was created in 1947.
PFC Litex Lovech was created in 1921.
PFC Panayot Volov was created in 1929.
PFC Pirin Blagoevgrad ended in 2008.
PFC Pirin Blagoevgrad was created in 1931.