Baoding Sinhai Sunboard Manufacturing Co., Ltd. is a manufacturer of greenhouse corrugated polycarbonate sheets used for agriculture and horticulture. They are 0.75 mm to 3.0 mm thick and transmit 80%–88% of light (clear) and block 98%–100% of UV radiation with a co-extruded protective layer of 50–100 microns. The corrugated design offers structural stiffness, promotes effective water drainage and minimises loading on the greenhouse frame, making them a viable glazing choice for commercial and small-scale applications.
Flat glazing panels need stronger structure to take wind and snow loads . The corrugated design distributes these stresses over the wave crests , enabling the panel itself to contribute to the structural resistance . This is significant in the design of greenhouses because the decrease of dead load on the supporting structure is a design consideration.
Light diffusion additives may be added to the sheet during manufacture. They spread the incident direct sunlight across a larger angle to reduce the intensity at any one spot on the plant canopy. This helps minimise leaf scorch on temperature-sensitive crops and enhances light distribution on lower levels of the canopy, a practical benefit in multi-tier growing systems.
The corrugated shape is also compatible with conventional worldwide metal roofing systems. Sinhai has more than 70 profile moulds, including Trapezoidal, Round Wave, Sinusoidal, Greca and other typical profiles used in commercial greenhouse building all over the globe.
| Parameter | Details |
|---|---|
| Thickness | 0.75 mm – 3.0 mm |
| Light Transmission (Clear) | 80% – 88% |
| Light Transmission (Opal) | 60% |
| UV Protection Rate | 98% – 100% |
| UV Coating Method | Co-extrusion, 50–100 micron, single-face or double-face |
| Operating Temperature | -40°C to +120°C |
| Material | 100% virgin PC; SABIC or BAYER resin available on request |
| Colors Available | Transparent, Bronze, Grey, Opal, Lake Blue, Amber, Dark Blue, Silver, Orange, Yellow, Custom |
| Standard Width | 1050 mm (custom sizes available) |
| Packing | Wooden pallet |
| Loading (20GP) | ~2,500 m² |
| Lead Time | 7–15 days |
| Certifications | ISO 9001:2015, CE, RoHS, UDEM |
All panels are constructed with 100% fresh new polycarbonate resin. For applications with more rigorous material traceability demands, imported SABIC or BAYER resin is provided as a specified alternative.
The UV protection layer is applied via co-extrusion and not by surface spraying. That means the UV layer is bonded into the sheet at time of manufacture and will not peel, delaminate or wear out with typical outdoor weathering. The practical impact is that panels keep their optical clarity over time and resist the yellowing and surface brittleness that are prevalent failure factors in lower grade corrugated roofing materials.
Quality checks are carried out to measure the thickness of the UV coating in microns to ensure that it is uniform across manufacturing batches.
Greenhouse corrugated polycarbonate sheets are used across a range of agricultural and commercial settings:
The corrugated profile is also compatible with industrial skylights, canopies, pergolas, and covered walkways where diffused natural light is the primary requirement.
Sinhai applies inspection at three stages: incoming raw material, in-process production, and pre-shipment. The key parameters checked include:
With over 70 available profile molds and full OEM/ODM capability, orders can be configured to match most standard metal roofing profiles in use globally. CNC cutting to specified dimensions is available for non-standard sizes.
Customization options include:
Smaller cutting orders are accepted, which makes mixed-container procurement practical for renovation projects or buyers sourcing multiple PC sheet types in one shipment.
Sinhai operates three production bases with 25 production lines. Standard greenhouse corrugated polycarbonate sheet orders are typically completed within 7–15 days depending on specification and volume.
For buyers in Central Asia seeking greenhouse corrugated polycarbonate sheets, the Kashgar production base can support delivery to regional destinations in approximately 7 days. Local warehouse resources are also available in Tashkent and Dushanbe.
Available shipping methods include sea freight, overland truck, and air transport. An in-house logistics team handles customs documentation and cross-border coordination.
Q1: Will these sheets fit my existing metal roof profile?
A: Sinhai offers over 70 profile molds — including Trapezoidal and Round Wave — designed to match common global metal roofing profiles. A custom profile can also be produced if your existing roof uses a non-standard geometry.
Q2: How should I fasten the sheets to avoid cracking?
A: Pre-drill holes 2–3 mm larger than the screw diameter to allow for thermal expansion and contraction. Fix screws at the crest of each wave, not in the valley, to maintain a weathertight seal and prevent water ingress.
Q3: How many fasteners are needed per sheet?
A: For standard 1050 mm-wide sheets, use 5–6 screws per purlin, positioned at the wave crests. This provides adequate hold without concentrating stress on the panel.
Q4: Can these panels be used on curved roofs?
A: The panels can be longitudinally curved. Minimum bending radius is approximately 4 meters for standard wave profiles, though this varies by thickness and profile shape.
Q5: Will the panels yellow over time?
A: The 50–100 micron co-extruded UV layer is designed to prevent yellowing and surface embrittlement. UV layer thickness is verified during quality control to confirm it meets specification.
Q6: Is it safe to walk on the panels during installation or maintenance?
A: No. Corrugated polycarbonate sheets are not rated to bear a person's weight. Use ladders or spreader boards positioned across the supporting purlins to distribute load during installation or maintenance.
Do you have more questions about greenhouse corrugated polycarbonate sheets? Send your project requirements or specification questions to [email protected].
⭐⭐⭐⭐⭐ · August 12, 2026
Central Asia - Uzbekistan Focus (Customization & UV Resistance)
Impressive customization capabilities! We ordered the customized Double‑wall Narrow Grid sheets with Double Circular Edges for our recent urban project in Tashkent. The fit and finish are exceptional. Most importantly, the use of high‑quality 3R virgin raw materials provides the thermal stability and UV protection needed for the intense Uzbek sun. A top‑tier partner for Central Asian infrastructure.
⭐⭐⭐⭐⭐ · July 25, 2026
South America - Corrugated Selection (Volume & Patent)
The best selection of corrugated profiles in the market. Having access to 70+ free molds saved us significant tooling costs. We are extremely pleased with the Trapezoidal 1000 and the 1060 Wave/Trapezoidal sheets in Bronze and Yellow; there is zero color deviation across the entire batch. Furthermore, their Patented Reed Sheets have given our architectural projects a unique, high‑end texture that no other supplier can offer.
⭐⭐⭐⭐⭐ · June 18, 2026
Southeast Asia - Solid Sheet (Durability)
Our go‑to supplier for Solid Polycarbonate Sheets. In the humid and high‑heat environment of Southeast Asia, these solid panels maintain perfect transparency and high impact resistance. The quality of the resin is evident, and the service is always efficient。