PC vs ABS Plastic Case
Polycarbonate (PC) and ABS are both high-performance engineering plastics for protective cases. PC is the strongest and clearest, ideal for heavy-duty and high-impact applications. ABS is more cost-effective and easier to mold. This guide compares them for B2B buyers.
Feature-by-Feature Comparison
| Feature | Option A | Option B |
|---|---|---|
| Density | 1.20 g/cm³ (heaviest) | 1.05 g/cm³ |
| Tensile strength | 60-70 MPa | 40-50 MPa |
| Impact strength (Notched Izod) | 600-850 J/m (highest) | 200-400 J/m |
| Heat deflection temperature | 130°C @ 0.45 MPa | 100°C @ 0.45 MPa |
| Clarity | Transparent (90% light transmission) | Opaque only |
| UV resistance | Best (with UV stabilizer) | Moderate (yellows) |
| Flame rating | V-2 (with additives, V-0) | HB (with additives, V-0) |
| Chemical resistance | Poor (solvents, acetone) | Good (mild chemicals) |
| Cost | Highest (40-60% more than ABS) | Moderate |
| Mold complexity | Requires higher temps, more care | Easy to mold |
| Best for | Premium cases, clear/transparent, military, aerospace, high-impact | Standard cases, retail, color-coded, balanced cost/performance |
| Common applications | Mil-spec cases, aerospace, clear equipment covers, Riot shields, premium tool cases | Camera cases, retail packaging, electronic cases, mid-range tool boxes |
Our Verdict
Choose PC for: highest impact strength, transparency, UV resistance, premium positioning, Mil-Spec applications. Choose ABS for: balanced cost/performance, easier molding, color matching, standard B2B protective cases. PC+ABS blends offer a middle ground.
Frequently Asked Questions
Is PC stronger than ABS?
Yes, PC has 2-3x the impact strength of ABS (600-850 vs 200-400 J/m Notched Izod). PC also has higher tensile strength. For drop-prone applications, PC is significantly better.
Is PC the same as Lexan?
Lexan is SABIC's brand name for polycarbonate. Generic PC and Lexan are the same material. Other PC brands: Makrolon (Bayer/Covestro), Tuffak (Plaskolite), Palram (Sunguard).
Can PC be transparent?
Yes, PC has 89-91% light transmission, similar to glass. Clear PC cases are common for equipment covers, displays, and tactical electronics. Clear ABS exists but is more expensive and less clear than PC.
Is PC food safe?
PC is FDA-compliant for indirect food contact under specific conditions. However, BPA (bisphenol A) is a concern - we use BPA-free PC for food contact applications. PP is preferred for direct food contact.
Does PC yellow over time?
Without UV stabilizer, yes. With UV stabilizer, PC has the best UV resistance of common engineering plastics. We use UV-stabilized PC for outdoor applications. ABS yellows faster than PC even with UV additives.
What is PC+ABS blend?
PC+ABS blend (often called 'PC/ABS' or 'Lexan FR') combines the impact strength of PC with the processability of ABS. Common ratios: 70/30, 50/50. Used in automotive interior parts and high-end cases. We offer custom PC/ABS blends.
Need a custom quote?
Contact KeXinMaterials for OEM/ODM case manufacturing. 12h quote, 30-day delivery.