2026-09-21 · KeXinMaterials 编辑团队
PP / ABS / 铝 / 碳纤维 材料对比 B2B 防护箱指南 2026
防护箱材料选择影响成本 5-20 倍、重量 3-10 倍。PP 主流、ABS 精密、铝 高级/ATEX、碳纤维 超高级。
PP(聚丙烯)特性
PP is the mainstream protective case material. Lightest, cheapest, most recyclable. 70-80 percent of B2B protective cases use PP.
Density: 0.90 g/cm3 (lightest of common plastics). 30 percent lighter than ABS.
Impact resistance: Izod notched 100-200 J/m. Good toughness at room temperature. Becomes brittle at -20C and below.
Chemical resistance: Excellent against acids, alkalis, alcohols. Good against oils and greases. Limited against strong oxidizers.
Water resistance: Excellent. Zero water absorption.
UV resistance: Poor. Requires UV stabilizer for outdoor use. Black color most UV-stable (carbon black).
Recyclability: Excellent. Resin code 5. Well-established recycling stream.
Temperature range: -20C to +120C. Standard cases rated -10C to +80C.
Cost: USD 1.5-3 per kg (virgin PP). USD 2-4 per kg (filled / modified). USD 2.5-5 per kg (rPP 30-50 percent).
B2B recommendation: PP for 80 percent of B2B applications - lightweight + cost-effective + recyclable.
ABS 特性
ABS is harder than PP with better dimensional stability. Used for precision cases + premium plastic cases.
Density: 1.05 g/cm3. 17 percent heavier than PP.
Impact resistance: Izod notched 200-400 J/m. Better than PP, especially at low temperatures.
Dimensional stability: Excellent. Low mold shrinkage. Good for precision fit.
Surface finish: High-gloss. Premium appearance. Easy to paint.
Chemical resistance: Good against acids, alkalis. Limited against solvents.
UV resistance: Poor. Requires UV stabilizer for outdoor use.
Recyclability: Established stream. Resin code 7 (other).
Temperature range: -20C to +80C.
Cost: USD 2-5 per kg (virgin ABS). USD 3-7 per kg (filled). USD 3-6 per kg (rABS).
B2B recommendation: ABS for precision cases (instruments, medical) where dimensional stability + high-gloss finish matter.
铝材特性
Aluminum is premium material for ATEX + high-durability cases. Highest cost but longest lifetime + best ESG profile.
Density: 2.70 g/cm3. 3x heavier than PP. Adds weight but improves heat dissipation.
Impact resistance: Lower than plastic. Deforms permanently on impact. Better at -40C (no cold-brittle).
Thermal conductivity: 200 W/mK. Excellent heat dissipation. Critical for electronics / cold chain.
Strength: Tensile 200-500 MPa depending on 5000/6000/7000 series.
ATEX certification: Aluminum naturally conductive. Meets ATEX surface resistivity < 1x10^9 ohm.
Corrosion resistance: Natural oxide layer. Marine grade (5000 / 6000 series) for salt environment.
Recyclability: Excellent. Recycling saves 95 percent energy vs primary.
Cost: USD 2-5 per kg (5000 / 6000 series). USD 5-15 per kg (machined / finished). USD 8-25 per kg (complex shapes).
B2B recommendation: Aluminum for ATEX / cold chain / military / industrial cases where durability + heat dissipation matter.
碳纤维特性
Carbon fiber is ultra-premium material. Lightest + strongest + most expensive. Used for aerospace / defense / professional photography.
Density: 1.5-1.8 g/cm3 (depending on fiber volume fraction). Lighter than aluminum, heavier than PP.
Tensile strength: 1500-7000 MPa depending on fiber type. 5-10x stronger than aluminum by weight.
Stiffness: 100-700 GPa depending on fiber type. 3-5x stiffer than aluminum.
Corrosion resistance: Excellent. Immune to most chemicals.
Vibration damping: Lower than metal. May amplify vibration - design consideration.
EMI shielding: Carbon fiber provides partial EMI shielding (vs zero for plastic).
Cost: USD 50-200 per kg (raw fiber). USD 200-1000 per kg (finished composite part).
Manufacturing complexity: Layup + cure + finish. Higher MOQ than injection molding.
Recyclability: Limited. Carbon fiber is difficult to recycle economically.
B2B recommendation: Carbon fiber only for aerospace / defense / high-end photography. Not cost-effective for general B2B.
材料对比表
Side-by-side comparison of PP / ABS / aluminum / carbon fiber for protective cases.
Cost (USD/kg raw): PP 1.5-3 / ABS 2-5 / Aluminum 2-5 / Carbon 50-200.
Cost (finished case 500x400x250mm): USD 20-50 / USD 30-60 / USD 80-150 / USD 300-800.
Density (g/cm3): PP 0.90 / ABS 1.05 / Aluminum 2.70 / Carbon 1.5-1.8.
Weight (500x400x250mm case): 0.9-1.3 kg / 1.1-1.5 kg / 2.5-4 kg / 1.4-2 kg.
Impact (Izod J/m): PP 100-200 / ABS 200-400 / Aluminum n/a / Carbon 500+.
Temperature range: -20C to +120C / -20C to +80C / -40C to +200C / -40C to +200C.
Recyclability: Excellent / Established / Excellent / Limited.
ATEX compatible: With carbon / Yes / Yes / Limited.
UV resistance: Poor / Poor / Excellent / Good.
OEM tooling cost: USD 5,000-30,000 / USD 5,000-30,000 / USD 30,000-100,000 / USD 50,000-200,000.
OEM MOQ: 500-1,000 / 500-1,000 / 1,000-5,000 / 100-500.
B2B recommendation: PP default. ABS for precision. Aluminum for ATEX + premium. Carbon fiber only for ultra-premium.
按应用选材
Different B2B applications favor different materials based on requirement priorities.
Camera / photography: PP (lightest) or ABS (precision fit). Carbon fiber for high-end. Plastic = 90 percent of market.
Drone / RC: PP (lightweight + impact resistance). Aluminum for premium FPV / professional.
Military / tactical: PP (impact + cost) or aluminum (extreme durability). ATEX + ballistic: aluminum + steel hybrid.
Medical / clinical: PP (sterilization + recyclable) or ABS (precision). Cleanroom + autoclave: PP preferred.
Cold chain / pharma: Aluminum (thermal conductivity) for active temperature control. PP for passive insulation.
Industrial / oil + gas: Aluminum (ATEX + durability) for Zone 1. PP for Zone 2 cost-effective.
Marine / outdoor: Aluminum (corrosion resistance). PP with UV stabilizer for budget.
Aerospace: Carbon fiber (weight + strength). Aluminum for cost-sensitive aerospace.
B2B recommendation: Match material to application requirements. Avoid over-specifying (cost) or under-specifying (risk).
混合 + 复合材料箱
Hybrid cases combine multiple materials for optimal cost + performance. Common in premium / ATEX / military applications.
PP shell + aluminum frame: Lightweight shell + rigid aluminum reinforcing frame. Used for medium-duty cases.
Aluminum shell + PU foam: Heavy-duty shock absorption for ATEX + military.
ABS shell + aluminum insert: Precision ABS exterior + aluminum thermal dissipation interior.
Carbon fiber + aluminum: Aerospace-grade hybrid. Lightweight + strength.
PP + fiberglass: Mid-tier hybrid. Glass fiber reinforced PP for stiffness.
Hybrid advantage: Optimize each material for its strength. Combine cost-effective PP with premium aluminum insert.
Hybrid complexity: Higher tooling + assembly cost. 10-30 percent premium over single-material case.
B2B recommendation: For premium / military / aerospace, evaluate hybrid. For general B2B, single-material PP / ABS sufficient.
B2B 材料选择检查清单
Decision framework for B2B protective case material selection based on application requirements.
Step 1 - Define use case: Indoor vs outdoor / portable vs stationary / precision vs impact resistance.
Step 2 - List requirements: IP rating / ATEX zone / temperature range / weight limit / impact rating.
Step 3 - Prioritize cost vs performance: Cost-sensitive = PP. Performance-sensitive = ABS or aluminum.
Step 4 - Consider ESG: Recycled content / carbon footprint / EPR compliance. Aluminum wins on ESG.
Step 5 - Evaluate OEM: MOQ / tooling cost / lead time. PP / ABS have lower OEM threshold.
Step 6 - Sample test: Request samples from 2-3 factories with different materials. Compare in real use.
Step 7 - Long-term cost: Total cost of ownership = initial cost + maintenance + replacement. Aluminum may be cheaper long-term.
Step 8 - Brand positioning: Premium brand = aluminum / carbon fiber. Mid-tier = ABS. Mainstream = PP.
B2B recommendation: Start with PP unless specific requirement (ATEX / medical / aerospace) demands aluminum or carbon fiber.
核心要点
- PP:0.90 g/cm3,USD 1.5-3/kg,主流 B2B 防护箱 70-80%,可回收
- ABS:1.05 g/cm3,USD 2-5/kg,精密 + 高光,尺寸稳定
- 铝:2.70 g/cm3,USD 2-5/kg 原料,高级 + ATEX + 冷链 + 军用
- 碳纤维:1.5-1.8 g/cm3,USD 50-200/kg 原料,超高级 航空 / 军用
- ATEX 兼容:铝自然合规;PP / ABS 需要碳填充
- UV 抗性:铝最好;PP / ABS 需要 UV 稳定剂
- 回收:PP / 铝 95%;ABS 已建立;碳纤维有限
- OEM 阈值:PP / ABS USD 5-30K 模具;铝 USD 30-100K;碳 USD 50-200K
常见问题
PP 和 ABS 的区别?
PP vs ABS:PP 轻 30%、便宜、可回收性更好。ABS 更硬、尺寸稳定性更好、高光表面。PP 用于主流 B2B;ABS 用于精密医疗/仪器。
铝还是合成材料更好?
铝 vs 合成材料:铝适用于 ATEX、散热、极端耐久性、军用/工业。合成材料适用于重量、成本、抗冲击、可回收性。
PP 和铝箱的成本差异?
PP 箱 USD 20-50(500x400x250mm)。铝箱 USD 80-150 同尺寸。铝贵 4-7 倍。
碳纤维值得吗?
碳纤维 USD 50-200/kg 原料 + USD 200-1000/kg 成品。10-50 倍溢价。只适用于航空、军用、高端摄影。
ATEX 防护箱最佳材料?
铝最佳 - 自然导电(表面电阻 < 1x10^9 欧姆),无需碳填充。PP / ABS 加碳填充可达 ATEX。
最轻的防护箱材料?
PP 0.90 g/cm3。比较:PP 0.90 / HDPE 0.95 / ABS 1.05 / PC 1.20 / 铝 2.70。
最耐用的防护箱材料?
取决于损坏类型:冲击 PP / ABS / 变形铝 / UV 铝 / 化学 PP / 温度铝。
材料选择对 OEM 模具成本影响?
PP 注塑 USD 5-30K。ABS 类似。铝压铸 USD 30-100K。铝 CNC USD 10-50K。碳纤维 USD 50-200K。