Milastomer™

Kalrez® perfluoroelastomer (FFKM) seal parts, the outstanding preformance have special design to resist more than 1,800 chemicals, solvents and plasmas. There are various conpounds for each specific aggressive process environments such as acids, amines, plasma, ultrapure de-ionized water, painting or strong bases. Those available Kalrez® parts of different compounds are formulated to optimize properties and give the best performance in numbers of chemicals and high temperatures conditions.


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Milastomer™ is a Thermoplastic Vulcanizate (TPV) ,derived from olefin-based rubber and polyolefin resin. MILASTOMER™ TPVs offer the sustainability benefits of a polyolefin with the durability and flexibility of a vulcanized rubber. Produced with the olefin polymerization and synthetic rubber technology of Mitsui Chemicals, MILASTOMER™ does not require compounding or vulcanization. It is a thermoplastic resin that can be extruded, or molded into flexible parts. MILASTOMER™ is available in standard black, or in natural grades that can be easily colored. 

MILASTOMER™ key performance benefits:

  • Light Weight – density less than 900 kg/m3.
  • Heat Resistance – Higher softening temperature than other Elastomers.
  • Rubber Elasticity – Deformation recovery superior to vulcanized rubber in long-term compression set.
  • Weatherability – MILASTOMER™ B (black) grades may be used outdoors over the long-term. Both black and natural grades have superior ozone resistance.

Applications :

  • Automotive parts
  • Building materials
  • Appliance parts
  • Sporting goods
GradeTDSMelt Index, g/10 min (10kg, 230°C)Durometer Hardness (Shore A)Density, kg/m3ProcessingModulus at 100% at EL, MPaTensile Strength at break, MPaElongation, %Compression set, % (23°C/22h)Compression set, % (70°C/22h)Application
MILASTOMER™ 6030NS
5058880Blow molding1.43.84802437Weather Strip, Gasket, Grip
MILASTOMER™ C700BM
2569880Injection molding-5.24002539Weather Strip, Gasket (High Flow Grade)

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