KUREHA Microsphere

Heat expandable microcapsules

KUREHA Microspheres are thermally expandable microcapsules developed by Kureha. They are used in a wide range of applications, including automobile components, footwear soles, foaming ink and adhesives.


  • Narrow temperature range from start to maximum foaming.
  • Size distribution is narrow, for uniform particles.

KUREHA Microspheres are consistent by grade, with a wide maximum expansion temperature of 120ºC-210ºC. We are currently developing a high heat-resistant grade with a maximum expansion temperature of 230ºC-250ºC for use in injection and extrusion molding.


  • Weight reduction: Automotive interiors, footwear soles
  • Thermal insulation: Wallpaper, ceiling material
  • Design: Foaming inks, wallpaper

Expansion mechanism of KUREHA Microspheres

Model of the expansion mechanism for KUREHA Microspheres

Contact for inquiries

Advanced Polymers Department
TEL:03-3249-4693 / FAX:03-3249-4603