| Choosing the Right Plastic Material:A Comprehensive Guide |
| Material |
Chemical Properties |
Physical Properties |
Typical Applications |
Processing Notes |
| POM |
- Resistance to chemicals: Good resistance to oils, fats, and solvents
- Water resistance: Fair |
- Mechanical properties: High rigidity, high strength, wear resistance
- Thermal resistance: Continuous use temperature -40°C to 100°C, Heat Deflection Temperature 136°C (homopolymer) / 110°C (copolymer)
- Electrical properties: Excellent electrical insulation and arc resistance |
Gears, bearings, high-load components |
- Injection molding temperature: 190°C to 240°C
- Drying: Not usually required, but recommended to prevent hydrolysis |
| PC |
- Chemical resistance: Resistant to water, inorganic salts, bases, and acids
- Flame retardancy: UL94 V-2 rating |
- Mechanical properties: Combination of rigidity and toughness
- Thermal stability: Melting temperature 220°C to 230°C, decomposition temperature above 300°C
- Dimensional stability: Excellent creep resistance
- Optical properties: Good transparency |
Electrical and commercial equipment, appliances, transportation industry |
- Poor flow, difficult injection molding
- Drying: Recommended at 80-90°C |
| ABS |
- Chemical resistance: Resistant to water, inorganic salts, bases, and acids
- Flame retardancy: Combustible, poor heat resistance |
- Comprehensive physical and mechanical properties: High impact strength, good low-temperature impact resistance
- Dimensional stability: Good
- Electrical properties: Good |
Automotive, refrigerators, high-strength tools, telephone housings, etc. |
- Low water absorption, but drying is necessary to prevent moisture effects
- Melting temperature 217~237°C, decomposition temperature >250°C |
| PVC |
- Chemical resistance: Strong resistance to oxidizing agents, reducing agents, and strong acids
- Flame retardancy: Not easily combustible |
- Physical properties: High strength, climate resistance
- Thermal resistance: Important melting temperature during processing |
Water supply pipes, household pipes, wall panels, etc. |
- Poor flow characteristics, narrow processing range
- Low shrinkage rate, generally 0.2~0.6% |
| PA6 |
- Chemical resistance: Resistant to greases, petroleum products, and many solvents
- Flame retardancy: UL94 V-2 rating |
- Mechanical properties: High tensile strength, high flexural strength
- Thermal properties: Continuous use temperature 80°C to 120°C
- Water absorption: About 2.8% |
Engineering plastics, automotive, machinery, electronics, etc. |
- Drying treatment: 100-110°C for 12 hours
- Melting point: 215°C to 225°C |
| PA |
- Chemical resistance: Resistant to greases, petroleum products, and many solvents
- Flame retardancy: UL94 V-2 rating |
- Mechanical properties: High mechanical strength, wear resistance
- Thermal properties: High softening point, heat resistant
- Water absorption: High water absorption, affecting dimensional stability |
Gears, pulleys, bearings, impellers, etc. |
- Hygroscopic, must be dried before molding |
| PMMA |
- Chemical resistance: Good weather resistance, optical properties |
- Optical properties: Colorless and transparent
- Mechanical properties: High strength
- Thermal resistance: Average |
Signs, safety glass, lighting fixtures, etc. |
- Drying: Not usually required |
| PE |
- Chemical resistance: Good resistance to drugs |
- Physical properties: Lightweight and flexible
- Thermal resistance: Low-density polyethylene has a low heat deflection temperature |
Films, bottles, electrical insulating materials, etc. |
- Melt flow index affects melt fluidity |
| PP |
- Chemical resistance: Good resistance to drugs |
- Physical properties: Lightweight and flexible
- Thermal resistance: Higher softening point
- Chemical resistance: Resistant to acids, bases, and salts |
Films, plastic ropes, tableware, etc. |
- Drying: Not usually required |
| PPS |
- Chemical resistance: Good resistance to most chemicals |
- Thermal resistance: Continuous use temperature 200-240°C
- Mechanical properties: High strength and rigidity
- Flame retardancy: Self-extinguishing material |
Electrical connectors, electrical components |
- Drying: 120-140°C for 3-4 hours
- Processing temperature: 290-330°C |
| PET |
- Chemical resistance: Good heat and drug resistance |
- Mechanical properties: Good electrical insulation
- Thermal resistance: Suitable for various high-temperature environments |
Packaging materials |
- Drying: Recommended |
| PBT |
- Chemical resistance: Resistant to a variety of chemicals |
- Thermal properties: Continuous use temperature up to 80°C to 120°C
- Water absorption: Low water absorption rate |
Automotive, electronics, electrical appliances, etc. |
- Drying: Recommended |
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