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The fatigue test is an indicator of foam durability. In this test, a force of 70 kg weight is applied to the foam sample 80,000 times and the sample is crushed. The hardness of the sample must have been measured before starting this test. 1.5 hours after the test ends, the hardness of the sample is measured again. Finally, the hardness is measured again after 6 hours. The difference between this value and the hardness value before the test is divided by the initial hardness value to determine the hardness loss expressed as a % ratio. If the foam is to be used as a mattress, the fatigue property is of primary importance. This test provides the opportunity to evaluate the performance of flexible polyurethane foams during use. Briefly, the test is equivalent to a person weighing 70 kg using a mattress for 15 years. The test is performed in accordance with the TS 3460 EN ISO 3385 standard.
Birlik Sünger Kimya San. ve Tic. A. Ş. was established in Eskişehir in 1987 to produce various types of foams for the furniture, mattress, cleaning, and textile industries.
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