Products

Silicone Rubber (HCR)

Silicone Rubber (HCR) Molding

Non-Post-Cure

Grades that achieve stable properties without post-curing, cutting process time and energy.

  • 2 grades
  • Shore A 42–82

Applications

  • O-ring
  • Roll
  • Boot
  • Sheet
  • Gasket
  • Packing

Typical Properties by Grade2 grades

GradeAppearanceSpecific gravityPlasticityWilliamsHardnessShore ATensile strengthkgf/cm²Elongation%Tear strengthkgf/cmCompression set%, 180℃×22hCuring agentPHRCurePress ℃/min · Post ℃/hr
NPC 140UTranslucent1.1022042806002413SC-8B · 1.0170/10 · 200/4
NPC 180UMilky white1.4226082601002010SC-8B · 1.0170/10 · 200/4

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Values are typical measurements based on KS M6518, not specifications, and may vary with curing agent and cure conditions.

Heat & Oil Resistance and Other Properties

GradeLinear shrinkage%Heat aging 250℃×72hOil IRM903 150℃×72h
Hardness ΔTensile Δ%Elongation Δ%Hardness ΔTensile Δ%Elongation Δ%Volume Δ%
NPC 140U3.7-5-25-28-15-58-46+55
NPC 180U2.9+5-10-30-15-15-10+30

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