2026-09-21 · Equipo editorial KeXinMaterials
PP vs ABS vs PC Comparación Materiales: Guía de Adquisición B2B Cajas Rígidas 2026
PP, ABS y PC son los tres materiales dominantes para cajas de protección B2B. PP es el más ligero + barato. ABS es gama media. PC es el más fuerte + caro.
Comparación de propiedades del material
PP, ABS, and PC differ significantly in density, impact strength, temperature range, UV resistance, and chemical resistance. Material choice depends on application + spec requirements.
PP (polypropylene): density 0.90 g/cm³, lightest. Impact strength (Izod) 100-150 J/m. Temperature range -20C to +100C. UV resistance moderate (UV stabilizer required). Chemical resistance excellent (acids, bases, solvents). Tensile strength 25-40 MPa.
ABS (acrylonitrile butadiene styrene): density 1.04 g/cm³, mid-range. Impact strength 200-400 J/m. Temperature range -40C to +85C. UV resistance low (yellowing over time). Chemical resistance moderate. Tensile strength 35-50 MPa.
PC (polycarbonate): density 1.20 g/cm³, heaviest. Impact strength 600-900 J/m (highest). Temperature range -40C to +120C. UV resistance moderate (UV stabilizer required). Chemical resistance poor (solvents attack). Tensile strength 55-75 MPa.
PP+GF (glass fiber reinforced PP): density 1.05-1.20 g/cm³, mid-range. Impact strength 80-100 J/m (slightly lower than pure PP). Temperature range -30C to +110C. UV resistance moderate. Glass fiber content 10-30%.
Costo + MOQ + plazo
PP is cheapest, PC is most expensive. Cost difference affects B2B procurement decisions.
PP: USD 1.20-1.80/kg. Cheapest material. Easy to mold, low tool wear.
PP+GF (glass fiber): USD 1.50-2.50/kg. Mid-range. Higher strength than pure PP.
ABS: USD 1.80-2.50/kg. Mid-range. Common in consumer electronics.
PC: USD 3.00-5.00/kg. Most expensive. Specialty applications.
PP/PC blend: USD 2.50-3.50/kg. Mid-range. Combines PP + PC properties.
Tooling cost: PP tooling cheapest (lower temperatures, lower pressure). PC tooling most expensive (high temperatures, high pressure).
MOQ: PP 50-100 cases. ABS 100-200 cases. PC 200-500 cases (due to higher cost).
Consideraciones de moldeo por inyección
PP, ABS, PC differ significantly in injection molding parameters. Material choice affects tooling cost, cycle time, and product quality.
PP molding: melt temperature 200-260C, mold 20-30C, injection pressure 60-100 MPa. Cycle time 15-25 seconds. Easy to mold, low tool wear.
ABS molding: melt temperature 220-260C, mold 40-80C, injection pressure 70-100 MPa. Cycle time 20-30 seconds. Slightly more challenging than PP.
PC molding: melt temperature 280-320C, mold 80-120C, injection pressure 80-140 MPa. Cycle time 30-45 seconds. Requires precision tooling + high temperatures.
Tool wear: PP lowest (mild). ABS moderate. PC highest (abrasive + high temperature). PC tools require hardened steel (HRC 60+) and frequent maintenance.
Shrinkage: PP 1.5-2.5%. ABS 0.3-0.8%. PC 0.5-0.7%. PP requires more precise shrinkage compensation.
Recomendaciones de aplicación B2B
Different B2B applications favor different materials. Below is the 2026 recommendation.
Photography / broadcast (camera cases): PP+GF for lightweight + adequate strength. PP+GF 30% for premium cases.
Military / tactical (NSN procurement): PP+GF for impact resistance + cost-effectiveness. Berry Amendment compliant materials.
Drone (1-5 kg payload): PP+GF for lightweight + impact resistance. Cost-effective for frequent replacement.
Medical (cleanability + compliance): ABS or PP for cleanability. Anti-microbial additive.
Industrial / measurement (5+ kg instrument): PP+GF for impact resistance + cost. Standard.
Aerospace (AS9100 + UL94 V-0): PC for strength + flame resistance. Premium cost.
Marine (IP68 + salt fog): PP or PP+GF for UV + salt water resistance.
Cold chain (2-8°C refrigerated): PP or PP+GF for low temperature toughness.
Consumer (camera / outdoor / Pelican alternative): ABS or PP for cost-effectiveness.
Resistencia UV + química
UV and chemical resistance differ across PP, ABS, PC. Important for outdoor / industrial use.
UV resistance: PP moderate (UV stabilizer required for outdoor). ABS low (yellows over 6-12 months outdoor). PC moderate (UV stabilizer required for outdoor).
UV stabilizer additive: HALS (hindered amine light stabilizer) 0.5-1.5%. Carbon black 0.5-2% for black color. UV absorber 0.3-0.5% for transparent.
Chemical resistance: PP excellent (most acids, bases, solvents). ABS moderate (some solvents attack). PC poor (solvents like acetone, toluene attack).
Salt water: PP excellent (used for marine). ABS moderate. PC poor (becomes brittle).
Hydrocarbon (oil, gasoline): PP excellent. ABS moderate. PC poor (stress cracking).
Acid: PP excellent. ABS moderate. PC poor (concentrated acid attacks).
Propiedades de temperatura + mecánicas
Temperature range and mechanical properties are key for industrial / extreme environment cases.
Low temperature toughness: PP -20C, ABS -40C (better), PC -40C (best). For cold chain (-20C deployment), PC or ABS preferred over PP.
High temperature: PP 100C, ABS 85C, PC 120C. For hot industrial deployment (foundry, oven, etc.), PC preferred.
Tensile strength: PC 55-75 MPa (highest), ABS 35-50 MPa (mid), PP 25-40 MPa (lowest). For load-bearing applications, PC preferred.
Flexural modulus: PC 2300 MPa (highest stiffness), ABS 2000 MPa, PP 1500 MPa. For rigid cases, PC > ABS > PP.
Impact strength: PC 600-900 J/m (highest, including low temperature), ABS 200-400 J/m, PP 100-150 J/m. For impact-critical, PC > ABS > PP.
Sostenibilidad + reciclabilidad
Sustainability and recyclability differ across PP, ABS, PC. Important for EU CSRD + US SEC ESG reporting.
PP recyclability: high. Mono-PP cases can be recycled as PP stream. Recycled PP (rPP) 30-50% blend available.
ABS recyclability: moderate. ABS recycling requires separation from other plastics. Mixed ABS quality issues.
PC recyclability: low. PC recycling requires separation from other plastics. Yellowing limits recycling cycles.
Carbon footprint: PP 1.5-2.5 kgCO2e/kg, ABS 3.0-4.0 kgCO2e/kg, PC 4.0-6.0 kgCO2e/kg. PP lowest carbon footprint.
EU CSRD + US SEC: Scope 3 supply chain emissions reporting. Recyclability data required.
B2B recommendation: PP or PP+GF for sustainable case procurement. Mono-PP design for end-of-life recyclability.
Estrategias de optimización de costos
Material cost can be optimized by material choice, filler additives, and recycled content.
Use PP for cost-effective standard cases. 30-50% cost saving vs ABS or PC for non-critical applications.
Use PP+GF for premium cases with higher impact strength. Slightly higher cost vs pure PP.
Use ABS only when PP cannot meet spec (temperature, UV, impact). 30-50% cost premium vs PP.
Use PC only for extreme applications (aerospace, ultra-cold, ultra-high impact). 2-3x cost vs PP.
Recycled content: rPP 30-50% blend available. -5-15% cost vs virgin PP. Maintains 70-90% mechanical properties.
Calcium carbonate filler: 10-20% loading. -5-10% cost vs virgin PP. Slight property trade-off.
Puntos clave
- PP: USD 1,20-1,80/kg, más ligero, excelente resistencia química, sostenible
- ABS: USD 1,80-2,50/kg, gama media, buena tenacidad baja temperatura
- PC: USD 3,00-5,00/kg, más pesado, máxima resistencia de impacto + rango temperatura
- PP+GF: USD 1,50-2,50/kg, gama media, reforzado con fibra de vidrio para resistencia
- B2B por defecto: PP o PP+GF para la mayoría de cajas; ABS para baja temperatura; PC para aeroespacial
Preguntas frecuentes
¿Qué material es mejor para cajas de protección?
PP es el mejor material por defecto para la mayoría de cajas de protección B2B.
¿ABS o policarbonato es mejor para cajas?
PC tiene mayor resistencia al impacto y rango de temperatura más amplio.
¿PP es más barato que ABS para cajas?
Sí. PP es 30-50% más barato que ABS.
¿Qué es el PP reforzado con fibra de vidrio?
PP+GF (polipropileno reforzado con fibra de vidrio) es PP con 10-30% de fibra de vidrio.
¿PP es resistente a UV?
PP tiene resistencia UV moderada. Con estabilizador UV puede durar 5-10 años en exteriores.
¿Cuál es la diferencia entre PP y PE?
PP tiene punto de fusión más alto (160°C vs 130°C), mayor resistencia a la tracción.
¿Se pueden reciclar las cajas PP?
Sí. Las cajas PP son reciclables. El diseño mono-PP puede reciclarse como flujo PP.