Capabilities

Most plastics are poor heat conductors compared with metals, which is why they’re used as thermal insulators. Filled or engineered plastics can conduct more heat, so you pick data for the exact grade.
 • Thermal conductivity varies by polymer and by additives (glass fiber, carbon, minerals, foams).
 • Design details matter too: thickness, ribs, airflow, and contact area often dominate real-world heat transfer.

Plastics are often chosen because they’re light, corrosion-resistant, and can be molded into complex shapes at scale. The ‘best‘ plastic depends on strength, temperature, finish, and cost targets.
 • They can combine useful traits (impact resistance, chemical resistance, electrical insulation, or optical clarity) depending on the polymer and formulation.
 • Manufacturing processes can add features directly into the part (bosses, ribs, textures, labels), reducing assembly steps.