Foaming Technologies from CPST

How CPST products modify EVA foam

• CPST has core technologies to modify various EVA foam systems to provide performance of polymer matrix or surface polarity and morphology
• Patented technologies
• Introducing nano-fillers to maximize activity of functional groups through reactive extrusion
• Homogeneous nucleation & excellent compatibility
• Maintain good physical properties at higher expansion foams
• Many commercialized products for EVA foam in footwear applications


Core Technology of CPST modifiers

• Organic-inorganic hybrid between nano inorganic particle and polar functional resins thru reactive extrusion to attain ultimate physical properties & stable foam structure
• Finer cell via homogenous nucleation and higher melting strength with hydroxy groups from both nano particle and functional specialty polymers


Chemistry of CPST Modifiers


Homogenous Nucleation

Better homogenous nucleation (miscibility of additives) provides a higher number of nucleation sites, thus a finer cell structure with higher melt strength at high expansion ratios

Water + Oil

Water + Oil After shaking⇒ Separation

Water + Oil + Soap
(Ecomax  function)
After shaking ⇒ Homogenous


Melt strength

• Melt strength is one of the key properties for making high performance
foam with a closed cell structure at desired expansion ratios
• Similar concept : Bubble structure of soap solution


CPST products can provide:

Cost Savings

  - EVA replacement
  - 10 ~ 35% saving


  - Reduction of oil-based synthetic materials including EVA 
  - Bio-degradable foam

Performance improvement

  - Light weight(Lower density)
  - Split tear
  - Abrasion
  - Compression set


The following CPST products use this foaming technology:


Contact Us






Creative Polymer Solutions Technology


South Korea, Seoul, Sincheon-dong, 10 Olympic-ro35ga-gil, A 511 Jamsil The-Sharp-Starpark 05510

©2017 by CPST