Engineering Resin
Move to PC when ABS or PP cannot deliver the impact strength, heat margin, or optical clarity the product needs. NetProto reviews gate strategy, residual stress, and grade requirements before production.
Why Teams Choose PC
PC is not a default housing resin. It is the upgrade path when drop resistance, cracking risk, heat margin, or transparency become product requirements.
Product teams usually arrive at PC after ABS feels too brittle, too soft in heat, or unable to deliver a clear window or protective cover in the same part.
Because clear and cosmetic PC parts amplify gate marks, residual stress, and weld-line visibility, DFM should focus on flow path and appearance class earlier than on a standard opaque ABS cover.
PC Snapshot
Compare this PC snapshot against ABS if you are deciding whether the upgrade is justified.
Programs that need PC’s toughness or optical performance specifically.
Why buyers pay more for polycarbonate versus ABS or PP.
Cost and process risks that should be acknowledged before tooling.
PC Design Focus
These are the PC issues that most often change tooling or gate strategy—not generic molding reminders.
Define whether the part is optical-clear, translucent, tinted, or opaque before quoting
Place gates away from critical viewing areas to reduce blush and residual-stress patterns
Avoid sharp internal corners on impact-loaded housings that can initiate cracks
Disclose cleaning chemicals or solvent exposure that can attack PC in service
Call out flame, UV, or regulatory grades early—specialty PC options change both cost and process window
PC Application Map
This map is oriented around optics and toughness, not commodity packaging or wear parts.
| PC use case | Why PC is justified | Critical PC check |
|---|---|---|
| Transparent covers and lenses | Clarity plus toughness in one molded component | Optical grade, polish, and gate vestige location |
| Drop-resistant device housings | Higher crack resistance than standard ABS in many designs | Wall/rib strategy and residual stress risk |
| Protective windows and guards | Visibility with impact durability for safety-facing parts | Scratch, coating, and chemical cleaning exposure |
| Electrical toughness covers | Dimensional stability with elevated mechanical demands | Flame rating, heat rise, and regulatory documentation |
PC vs ABS
Most PC conversations start as an ABS upgrade decision. Use this comparison before locking resin family.
PC Quote Path
PC quoting should prioritize optical class, gate strategy, and chemical exposure earlier than a standard opaque housing review.
Confirm whether PC is needed for impact, clarity, heat, or a combination of those drivers.
Separate optical-clear surfaces from structural or non-visible areas so tooling and gating can be planned correctly.
Check thick sections, weld lines, and gate locations that create blush or residual stress in PC.
Align on flame, UV, medical/food-contact, or standard grades before final pricing and lead-time assumptions.
PC FAQ
Focused on ABS upgrades, optical grades, and process sensitivity.
Choose PC when impact strength, heat performance, or optical clarity exceed what ABS can reliably deliver. Keep ABS when cost, paintability, and a more forgiving process window matter more than those upgrades.
No. PC is available clear, translucent, tinted, and opaque. If optics matter, specify the viewing surface and finish expectations—clear grades are far more sensitive to gate and polish decisions.
PC can show residual stress, gate blush, and weld-line visibility, especially on clear or high-cosmetic parts. Geometry and tooling decisions affect both appearance and crack resistance.
CAD, quantity, clarity/color targets, drop or impact expectations, chemical exposure, finish class, and any flame or regulatory grade needs.
Quote a PC Part
If you are upgrading from ABS for impact or optics, upload the CAD and call out the surfaces that must stay clear, tough, or cosmetic-critical.
