Comfort Property of the Polyurethane Foams Including EPS Filler Particles

Jungha Lee, Jung Hyeun Kim

Research output: Contribution to journalArticlepeer-review


Polyurethane (PU) foams are widely used for seat cushioning materials in automobiles. The comfort properties of PU foams can be enhanced by adding various fillers to the base formulations. In this study, physical properties of PU foams were investigated by varying the content of expandable polystyrene (EPS) beads. EPS beads rarely changed the morphology (pore size, cavity size, pore ratio, and open porosity) of PU foams, but the sag factor and hysteresis loss increased as EPS beads were added. Especially, the stress values of the EPS-filled PU foams were much higher than those of the PU foams previously reported at a similar level of hysteresis loss. Therefore, it is promising to apply the EPS filler particles in manufacturing the PU foams for automotive seat applications.

Original languageEnglish
Pages (from-to)107-112
Number of pages6
JournalPolymer (Korea)
Issue number1
StatePublished - Jan 2022


  • Expanded polystyrene
  • Hysteresis loss
  • Polyurethane foam
  • Sag factor


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