Polycarbonate Profile
Dachang Plastic – Polycarbonate Profile
Custom-extruded PC profiles in milky, semi-clear, and transparent finishes for LED lighting, building, and industrial applications. Manufactured at our ISO 9001-certified extrusion factory in Dongguan, China — serving OEM buyers worldwide since 1998.
This collection covers Dachang's full range of extruded polycarbonate profiles — PC lamp covers, LED light diffusers, linear lampshades, and building-grade lighting covers — organised into Lighting Polycarbonate Profile and Building Polycarbonate Profile sub-categories. With 27 years of extrusion experience, our factory supports custom fabrication, private-label packaging, and bulk orders for OEM buyers across Asia, Europe, North America, South America, and Africa. Browse the catalog below or request a quote for your project specifications.
Factory Established
Annual Output
Extrusion Lines
Certified QMS
Extruded PC Profiles for LED Lighting and Building Applications
Dachang's PC extrusion catalog in this category is organised around two application lines. The Lighting Polycarbonate Profile series includes lamp covers, LED diffusers, and linear lampshades — for example, the 46mm High Impact PC Lamp Covers designed for LED luminaire housings, and the 71/46mm Zigzag Surface Extrusion Linear Lampshade that pairs decorative texture with even light diffusion. The building-grade series serves structural lighting environments such as gas station canopy covers and high-speed-train interior lamp housings, where impact resistance and flame retardancy are critical.
All PC profiles in this range are produced through continuous plastic extrusion, which maintains a consistent cross-section over the full length of each piece. Polycarbonate tolerates continuous operating temperatures of 120–130 °C — substantially higher than acrylic (PMMA), which is rated at 60–90 °C — making PC the preferred material when thermal loads from high-output LED arrays or outdoor exposure are a concern. Where optical transmission takes priority over impact strength, Dachang's acrylic extrusion profile line offers a complementary option.
PC Extrusion Tolerances and Optical Finish Specifications
PC extrusion profiles from this factory are produced to tolerances of ±0.08 mm to ±0.20 mm, a range dependent on wall thickness and cross-section complexity. For sourcing managers comparing polycarbonate with other materials available from the same supplier, the table below summarises tolerance, thermal, and application characteristics.
| Material | Typical Tolerance | Heat Resistance | Primary Advantage |
|---|---|---|---|
| Polycarbonate (PC) | ±0.08 – ±0.20 mm | 120–130 °C | Impact strength, flame retardancy options |
| Acrylic (PMMA) | ±0.05 – ±0.15 mm | 60–90 °C | Optical clarity (~92 % light transmission) |
| PVC | ±0.10 – ±0.25 mm | Lower | Chemical resistance, low cost |
| ABS | ±0.10 – ±0.20 mm | Moderate | Surface finish, paintability |
Three optical grades are standard across the PC profile line: milky (for uniform diffusion and LED-dot concealment), semi-clear (balancing transmission with moderate diffusion), and transparent (for maximum light output in lens or protective-cover applications). These finishes are determined during resin compounding and extrusion — not applied as a secondary coating — so optical performance remains consistent over the profile's service life.
Need help selecting the right PC grade or finish for your luminaire project? Send your cross-section drawing and operating conditions.
Polycarbonate Extrusion Capacity and Production Scale
Dachang operates a 16,000-square-metre extrusion facility in Tangxia, Dongguan, equipped with over 45 large-scale production lines and 20 small-scale lines. Annual output across all material categories — PC, PVC, ABS, PMMA, and PP / HIPS / PS / POM / TPE / TPV / PE — reaches 2,000 tons. Co-extrusion lines, introduced in 2010, enable multi-layer profiles that combine a structural PC core with a UV-stabilised or colour-matched outer layer in a single pass.
For polycarbonate products specifically, this infrastructure supports both sample-stage orders and sustained high-volume production. Regional processing centres in Guangzhou, Shanghai, and Beijing provide supplementary logistics, reducing consolidation lead time before export shipment to buyers in Europe, North America, and other markets.
Custom PC Profile Development: From Drawing to Sample
As a polycarbonate profile supplier with in-house mold-making capability, Dachang accepts OEM and ODM orders starting from dimensional drawings, 2D/3D CAD files, or physical samples. The mold workshop completes custom die design and produces the first sample extrusion within 72 hours — a turnaround significantly shorter than the industry-typical 7–15 day cycle. The design engineering team reviews each proposed cross-section before tooling begins and flags potential issues such as uneven wall thickness that could cause warping during cooling, reducing revision cycles.
This front-end engineering consultation is particularly relevant for product engineers who are designing a new LED luminaire or building fixture and need assurance that the PC diffuser geometry is extrudable at scale before committing to tooling expenditure.
Ordering Custom PC Lighting Profiles: MOQ, Private Label, and Bulk Supply
Minimum order quantities for custom polycarbonate extrusion profiles depend on profile complexity and whether existing tooling can be reused. Standard catalog products — such as the 46mm PC Lamp Covers or the Milky White Linear LED Lighting Covering — carry lower entry quantities because the dies already exist. For fully custom cross-sections, the MOQ is calculated to amortise the new die cost, and the sales team provides a specific quote once the drawing is reviewed.
Private-label service is available for bulk order buyers: finished profiles can be packaged with the buyer's branding, part numbers, and carton markings, so goods arrive warehouse-ready at the destination. Dachang currently exports PC extrusion products and other plastic profiles to buyers across Asia, Europe, North America, South America, and Africa.
Ready to discuss quantities, lead time, and pricing for your polycarbonate profile order?
Engineering Support for OEM Polycarbonate Extrusion Projects
Product engineers evaluating a PC extrusion profile for a new fixture or enclosure can request sample cross-section cuts and resin specification details before committing to a production order. Dachang's sales and engineering staff — multilingual in English, Mandarin, and Cantonese — coordinate directly with buyers via email (ken@euson.cn), WhatsApp, or Skype to align on dimensional specs, surface-finish expectations, and regulatory compliance requirements.
For projects that require both a PC diffuser and a housing profile in another material — for example a PVC extrusion profile or an ABS profile — Dachang can supply both components from the same factory. This reduces coordination complexity and shipping costs compared with sourcing from multiple suppliers.
Regulatory Compliance and Quality Certifications for Extruded PC Products
All polycarbonate profiles are manufactured under an ISO 9001-certified quality management system, with raw-material traceability and in-process inspection at every production stage. The following certifications and test reports are on file and available to buyers upon request.
PMMA 8N Anti-UV Report
1_REACH SVHC 33rd-2025-01-16
Yuanjinhui RoHS 2
PC Environmental Declaration
Custom PC Diffuser and Lamp Cover Profiles — Buyer FAQ
Q: What dimensional tolerances does Dachang hold on PC extrusion profiles?
A: Typical tolerances range from ±0.08 mm to ±0.20 mm, depending on wall thickness and cross-section complexity. The engineering team confirms the achievable tolerance for each custom profile during the quoting stage, before tooling begins.
Q: What optical finishes are available for PC lighting profiles?
A: Three standard grades are offered: milky (full LED-dot concealment with even diffusion), semi-clear (moderate diffusion with higher light transmission), and transparent (maximum transmission for lens or protective-cover uses). The finish is compounded into the resin during extrusion, not applied as a coating, ensuring long-term optical consistency.
Q: How fast can a custom PC extrusion mold be developed?
A: Dachang's in-house mold workshop completes die design and first-sample extrusion within 72 hours of receiving finalised dimensional drawings or CAD files. Standard-complexity cross-sections fall within this window; profiles with unusually thin walls or multi-cavity dies may require additional time, discussed upfront during quoting.
Q: What is the minimum order quantity for polycarbonate profiles?
A: MOQ depends on whether existing tooling is available. Standard catalog products — like the 46mm High Impact PC Lamp Covers — have lower minimums because the die already exists. Fully custom profiles require a new die, so the MOQ is calculated to amortise tooling cost. Contact the sales team with your drawing and target quantity for a specific quote.
Q: Are Dachang's PC profiles compliant with RoHS and REACH?
A: Yes. Profiles are manufactured from RoHS-compliant and REACH SVHC-tested resin. Test reports — including the 2023 RoHS PA-707K certificate and the REACH SVHC 33rd-edition report dated January 2025 — are available upon request. Buyers selling into the EU or California can also obtain Prop 65 phthalate and lead test documentation.
Q: How does polycarbonate compare with acrylic for LED diffuser applications?
A: Polycarbonate provides superior impact resistance and tolerates continuous operating temperatures of 120–130 °C, compared with 60–90 °C for PMMA. Acrylic offers approximately 92 % light transmission and somewhat tighter extrusion tolerances (±0.05–±0.15 mm). For high-impact or elevated-temperature environments, PC is the stronger choice; for purely optical applications at ambient temperatures, PMMA can be more cost-effective. Dachang manufactures both materials and can supply both types for evaluation.
Request a Quote for Custom PC Extrusion Profiles
Send your drawings, target quantity, and application details. Our engineering and sales team will review your specifications and respond with a tolerance assessment, material recommendation, and pricing.
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