PC vs PMMA vs Transparent ABS: Choosing the Right Clear Plastic
Compare polycarbonate, acrylic (PMMA), and transparent ABS on clarity, impact strength, UV resistance, chemical resistance, and cost for transparent product applications.
When a product needs to be transparent, three materials dominate the conversation: polycarbonate (PC), PMMA (acrylic), and transparent ABS (MABS). Each offers a different balance of clarity, toughness, weather resistance, and cost. Choosing wrong means either paying too much or watching parts crack in the field. This guide compares them across the criteria that actually matter for product designers and buyers.
Clarity & Optical Performance
Light transmittance comparison:
- PMMA: 92-93% - the clearest, with excellent optical clarity for lenses and displays - PC: 88-90% - very clear but with slight yellowness; haze ~1% - Transparent ABS (MABS): 85-90% - clear but less optically pure than PMMA
For optical applications (lenses, light guides, displays), PMMA wins. For products where slight haze is acceptable but impact resistance matters, MABS or PC are better. Note that PC yellows over time under UV exposure, which matters for outdoor transparent parts.
Impact Strength & Durability
This is where the materials diverge most:
- PC: Izod impact 60-90 kJ/m² (unfilled) - extremely tough, the standard for safety glazing and protective covers - MABS: 15-25 kJ/m² - good toughness, similar to ABS - PMMA: 1-2 kJ/m² - brittle, cracks on impact; needs thicker walls
PC is ~30-50x tougher than PMMA. For products that get dropped, bumped, or must survive outdoor impacts (safety shields, machine guards, lighting covers), PC is the choice. PMMA requires careful design (no sharp corners, adequate thickness). MABS sits between, good for consumer products with moderate impact demands.
UV, Chemical & Scratch Resistance
Environmental resistance differs significantly:
- UV: PMMA has excellent UV stability (20+ years outdoor); PC yellows without UV stabilizers; MABS is moderate - Chemical: PMMA is attacked by solvents and cleaners (crazing); PC resists oils but not strong alkalis; MABS has moderate resistance - Scratch: PMMA is the hardest (hard-coat friendly); PC scratches easily, needs hard coating; MABS is moderate
Outdoor transparent parts: PMMA (or PC with UV-stabilized grade). Automotive glazing: PC with UV coating. Consumer electronics covers: PC or MABS with hard coat.
Cost & Application Guide
Typical price ranking (per kg, China FOB, 2026 estimates): PMMA < MABS < PC. PC is typically 20-40% more expensive than PMMA.
Choose by application:
- Lighting covers, machine guards, safety shields: PC - Lenses, displays, signage, point-of-purchase displays: PMMA - Food containers, cosmetic packaging, toys, appliance windows: MABS - Automotive headlamp lenses: PC (with UV coating) - Greenhouses, skylights: PMMA (UV stability)
When in doubt, test with your actual part: molding trials with all three materials and real-world drop/weather testing beat any datasheet comparison.
Conclusion
There is no single best transparent plastic - only the best fit for your application. PMMA offers maximum clarity and UV stability at low cost but lacks toughness. PC delivers unmatched impact strength for demanding environments but costs more and needs UV protection. Transparent ABS (MABS) provides the best balance for consumer products that need both looks and durability. Jinsu supplies PC, PMMA, and MABS transparent ABS grades with full TDS - get samples and compare in your own mold.
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