What Material Products Will Use 2K Mold (two-component Injection Mold)

Materials for 2K Injection Molding: Key Combinations and Applications

2K molding is ideal for products requiring multi-material integration in a single cycle. 

How it works:

Injection of two different materials/colors in the same molding cycle (e.g. hard glue + soft glue)

Below are the primary material pairings and their industrial uses:

1. Rigid + Soft Material Combinations

• ABS/PC + TPE/TPU

• Shore hardness differential up to 40D (rigid) ↔ 80A (soft)

• Peel strength >25 N/cm (ASTM D903)

• Tool handles (rigid core + anti-slip coating)

• Wearable device straps (e.g., smartwatch bands)

• Applications:

• Advantages:

• POM + Silicone

• Surgical tool grips (POM precision + biocompatible silicone)

• Medical:

2. Transparent + Opaque Materials

• PMMA/PC + ABS

• Transparency contrast >85% (clear: 92% vs. opaque: <7%)

• Automotive light housings (clear PMMA + black ABS mounts)

• Cosmetic packaging (transparent windows + colored bodies)

• Optical Components:

• Critical Parameters:

3. High-Temp + Standard Plastics

• PEEK/PEI + PPS

• Engine compartment parts (PEEK insulation + PPS structural layers)

• Aerospace: Engine compartment parts (PEEK insulation + PPS structural layers)

  
  

• 4. Functional Material Pairings

• Conductive + Insulative

• EMI-shielded housings (PC-ABS + conductive PBT)

• Electronics:

• Foamed + Solid

• Noise-canceling headphones (foamed ABS dampening + solid PC shell)

• Consumer Goods: