Play Mode: Hard Shell Over SoftGel Core

https://youtu.be/qFXz2Jm1n58?si=JdZXf9Ti9BcarhPd

🛠 How It Works:

By leveraging material-level self-adhesion, softgel is injected into a rigid outer shell mold to form a soft-inside, hard-outside structure — combining tactile comfort with structural strength.

🧪 Material Recommendations:

• ✅ Recommended shell materials: PETG, metal, PLA (ABS is not recommended as mold material due to strong adhesion with softgel, which can cause demolding issues.)
• ✅ Recommended embedded softgel-compatible materials (for internal parts):
  • ABS: Strong natural adhesion with softgel at the microscopic level; perfect for load-bearing or high-strength hybrid structures like wheels or suction cups.
  • PC (Polycarbonate): Heat-resistant with moderate surface roughness, offering secure bonding with softgel.
• ❌ Not recommended for bonding with softgel: PLA / PETG / metal — surfaces are too smooth to adhere effectively, leading to potential slipping or delamination.

🎨 Use Case Examples:

• ⌨️ Mechanical Keycaps
  • Softgel core inside a rigid outer shell provides a comfortable, cushioned keystroke feel.
• 🎥 Camera Grip Handle Extensions
  • The grip zone is injected with softgel, delivering better comfort, anti-slip texture, and ergonomic handling.