How Plastic Components Function in Home Appliances

Functional Logic of External Plastic Components
Insulation and Protection: Leveraging the high electrical insulation properties of modified plastics, these components completely prevent direct user contact with live internal parts. They also feature UL94 V-0 flame retardancy, slowing the spread of fire during abnormal overheating to ensure safety.
Aesthetics and Structural Support: High plasticity allows for the integrated molding of complex, curved appliance housings. Glass fiber reinforcement enhances impact strength, preventing cracking from everyday bumps, while surface treatments like lamination and printing enable distinctive visual designs.
Thermal Insulation and Anti-Scalding: With thermal conductivity far lower than that of metal, these plastics block heat transfer from internal heating elements, preventing users from getting burned when touching the casings of appliances like rice cookers or steam irons.
Vibration and Noise Reduction: The material's inherent cushioning properties dampen vibrations from internal motors and compressors, reducing the transmission of unwanted noise and lowering the appliance's overall operating sound level.

 

Functional Logic of Internal Plastic Components
Thermal Insulation: In refrigerator polyurethane foam layers, injected raw materials react to form a multitude of closed micro-cells. Their extremely low thermal conductivity significantly blocks heat exchange between the interior and exterior, minimizing cooling loss and reducing energy consumption.
Environmental Durability: Polypropylene (PP) and nylon components in dishwashers and washing machines withstand prolonged exposure to hot water (above 90°C) and corrosive detergents without thermal deformation or embrittlement, making them suitable for high-humidity, highly corrosive internal environments.
Low-Loss Power Transmission: Gears, bushings, and sliders made from engineering plastics like POM and PC utilize the material's low-friction and high-wear-resistance properties to replace traditional metal parts, ensuring precise transmission while significantly reducing operating noise.
Sealing and Water Resistance: Gaskets and drain hoses made of soft PE or TPE utilize elastic deformation to fill assembly gaps, blocking moisture and liquids from entering the appliance's electrical compartments and preventing short-circuit risks.