This standard establishes quality requirements for the soft cellular
polyurethane materials intended to resist repeated pressures. Polyurethane
foams are classified according to their type, density, firmness and burning
behaviour*. This standard applies to polyurethane foams used for upholstery. It covers
foam blocks, those cut into different shapes (bands, sheets, etc.) as well as
molded foams. It does not apply to foams preprared in situ, nor to foams intended for carpet
backing, nor to bonded foams produced by the adhesion of small pieces of
urethane foams to each other. Suggested uses for the polyurethane foams covered under this standard are
listed in Annex C. * This standard refers to a testing method for burning behaviour of foams which
was considered the best available when the standard was prepared. However, the
use of an alternate testing method may be agreed upon between the manufacturer
and the user, particularly when burning behaviour is checked for foams which
are considered non-flammable.