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Durable, waterproof twin-wall polypropylene sheets for signage, packaging, layer pads, floor protection and agriculture. Custom size, thickness, colour and printing — factory direct.
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13+ years Manufacturing PP hollow board |
16+ Extrusion production lines |
30,000+ tons Annual capacity |
60+ Exported Countries |
Corrugated polypropylene sheet — also known as corrugated plastic sheet, PP hollow board, twin-wall polypropylene sheet, fluted plastic sheet, or by the trade namesCorflute and Correx — is a lightweight, waterproof sheet made from polypropylene (PP).
Two flat liners are bonded to a fluted (corrugated) core, forming a twin-wall structure. This hollow core distributes weight and impact force far more efficiently than a solid sheet of the same thickness, which is why you get the rigidity you need at roughly half the weight of solid plastic board.
Because polypropylene is chemically inert, the finished sheet does not absorb water, will not rot or mildew, and holds its properties in rain, humidity and coastal air. It is used across advertising and signage, logistics and packaging, construction protection, electronics and agriculture.
| Factory direct price | No trading company in between. You buy from the line that extrudes the sheet, which typically saves 15-25% against a distributor quote. |
| Stable batch quality | Colour, thickness and strength stay consistent from batch to batch, so you can plan repeat orders without re-testing every time. |
| On-time delivery | 16+ fully automated extrusion lines running in parallel, so a full-container order does not queue behind someone else's order. On-time rate: 98%. |
| Full customisation | Thickness 2-12mm, any width and length, any colour, plus printing, die-cutting, folding, welding and assembly. Send us a drawing or a photo and we will quote it. |
| Special grades available | Anti-static / ESD / conductive, flame-retardant (UL94), UV-stabilised, corona-treated for ink adhesion, food-contact grade available on request. |
| Free samples before you order | We send A4 or A3 samples in your chosen specification so you can test fit, printability and colour before committing to bulk. |
All values below are for standard 100% virgin PP material. Special grades and dimensions on request.
| Item | Specification |
| Product name | PP Corrugated Plastic Sheet / Coroplast / Corflute / Correx / Twin-wall Fluted Board / PP Hollow Board |
| Material | 100% virgin polypropylene (PP), no recycled filler |
| Thickness | 2, 2.5, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 mm or customised |
| Standard sheet size | 1220 × 2440 mm (4' × 8') · 1097 × 2440 mm · width up to 2600 mm, any length |
| Flute options | 3 mm / 4 mm / 5 mm flute (varies by thickness) |
| Density / areal weight | See the thickness–weight table below |
| Colours | White, black, blue, red, green, yellow, grey, orange, translucent, custom Pantone-matched |
| Surface treatment | One-side or two-side corona treatment (required for screen / UV printing) |
| Printing | 1-4 colours, silk screen / flexographic / UV digital, max print area 1600 × 2500 mm, one or both sides |
| Cutting & processing | Die-cut, CNC, guillotine, corner rounding, hole punching, folding, ultrasonic welding, assembly into finished parts |
| Special grades | Anti-static / ESD / conductive (106-109 Ω), flame-retardant UL94 V-0, UV-stabilised, food-contact grade |
| Working temperature | −20 °C to +80 °C (modified grades available for wider ranges) |
| Outdoor life | 6-12 months with UV-stabilised grade |
| Recyclability | 100% recyclable PP, no paper core, reusable 10+ times |
| Packaging | Film-wrapped pallets, or export carton / pallet-less packing to your requirement |
Weight is the most reliable way to confirm you are not being short-changed on thickness. Ask your supplier to confirm the areal weight, not just the millimetres.
| Thickness | Areal weight (gsm) | Typical use |
| 2.0 mm | 250-450 g/m² | Floor / wall protection, light packaging |
| 3.0 mm | 400-700 g/m² | Tree guards, garden stakes, signage |
| 4.0 mm | 500-800 g/m² | Most popular — signs, boxes, general use |
| 5.0 mm | 650-1200 g/m² | Layer pads, dividers, heavier duty |
| 6.0 mm | 800-1500 g/m² | ESD / anti-static electronics packaging |
| 8.0 mm | 1100-2000 g/m² | Pallet layers, load-bearing partitions |
| 10.0 mm | 1600-2400 g/m² | Double-wall pallets, heavy duty |
| 12.0 mm | 2000-3000 g/m² | Engineered panels, honeycomb applications |
| Light but rigid The twin-wall hollow core gives stiffness at roughly half the weight of solid board. |
Waterproof PP does not absorb water. No swelling, no softening, no loss of strength when wet. |
Easy to process Cut with standard tools, routed, drilled, hot-folded, welded. No special equipment. |
Reusable Rated for 10+ return trips — a much lower cost per use than cardboard. |
| 100% recyclable Mono-material PP, no paper core, fully recyclable back into the plastic stream. |
Excellent printability Takes silk screen, flexographic and UV digital ink cleanly. Corona treatment available. |
Weather resistant UV-stabilised grades hold colour and rigidity for 6-12 months outdoors. |
Easy to clean Smooth surface, stains can be easily wiped off with a towel. |
Shandong Flutepak Industry Co., Ltd. has produced polypropylene hollow board in Weifang, Shandong since 2008. We operate 16 fully automated extrusion lines in our own 50,000 m² plant, with an annual capacity of 30,000 tons. In-house extrusion means we control the whole chain — compounding, extrusion, calibration, cutting, printing and packing — rather than buying semi-finished board from someone else and hoping it matches spec.
| 30,000 tons Annual capacity |
16 Extrusion lines |
98% On-time delivery rate |
| ISO 9001 | Quality management system |
| ISO 14001 | Environmental management system |
| SGS / CE | Third-party material and food-contact testing |
| RoHS / REACH | Restricted-substance compliance for EU markets |
| UL94 V-0 | Flame-retardant grade available on request |
We ship to 60+ countries, mainly United States, Canada, Germany, or Australia. We are familiar with customs clearance documentation for these destinations and pack to survive a full sea voyage without corner damage or water ingress. If you have a specific destination, send us the port and we will confirm the shipping cost and lead time.
| MOQ | 1000 pieces. Mixed sizes and colours accepted in the same order. |
| Sample | Free A4 / A3 samples in your spec. Dispatched within 3 days; sample cost refunded on first bulk order. |
| Lead time | 7-12 days for standard sizes · 15-20 days for custom printing or fabrication · Sample 3 days |
| Incoterms | EXW · FOB Qingdao · CIF to your nearest port. DDP available on request. |
| Payment terms | T/T: 30% deposit, 70% before shipment · L/C at sight |
| Loading port | Qingdao, China |
| Shipping | Full container load, LCL, and air freight for samples and urgent small orders. |
| Documents | Invoice, packing list, bill of lading, certificate of origin. Third-party inspection reports on request. |
| Warranty | 12 months against manufacturing defects. Replacement or credit for verified defects. |
The honest version: corrugated plastic is not always the right choice. Here is when it is, and when it is not.
| Criterion | PP Corrugated Plastic | Corrugated Cardboard | Solid PP Sheet |
| Water resistance | Excellent — will not absorb water | Poor — fails when wet | Excellent |
| Reuse cycles | 10+ trips | 1 trip, occasionally 2 | 10+ trips |
| Stiffness at same thickness | High for the weight | Low | High, but roughly 2× the weight |
| Upfront cost | Medium | Lowest | Highest |
| Cost per use | Lowest over 5+ uses | Highest over time | Low |
| Print quality | Good, 1-4 colours, both sides | Good, but fades outdoors | Best — smooth, flat surface |
| Cutting in-house | Easy — scissors, saw, router | Easy | Harder — needs sharp tools |
| Outdoor life | 6-12 months UV grade | Days to weeks | 6-12 months UV grade |
| Recyclable | Yes, 100% mono-material | Yes, but needs dry, clean paper | Yes, 100% |
| Best choice for | Reusable, outdoor, wet or heavy-duty applications | One-time shipping, low budget | Where flatness and finish matter more than weight |
The short version: if you need the material for more than one trip, or it will be exposed to water or sunlight, corrugated plastic wins on cost per use. If it is a single-use export carton and the budget is the only concern, cardboard wins on upfront cost.
| What is the difference between Coroplast, Corflute and Correx? |
| Nothing physical — all three are trade names for the same product: twin-wall polypropylene corrugated sheet. Coroplast and Correx are the common names in North America and Australia, Corflute in the UK and Europe. Some buyers ask for "Correx" as a generic term. The material is identical; what differs between suppliers is flute structure, thickness tolerance and surface quality, which is what you should actually compare. |
| Are these sheets really waterproof and suitable for outdoor use? |
| Yes. Polypropylene does not absorb water, so the sheet will not swell, delaminate or lose strength in rain, and it can be washed and reused. For prolonged outdoor exposure we recommend our UV-stabilized grade to prevent sun fade, which is perfect for sign boards or agricultural tree guards. With a UV grade, 6-12 months of outdoor life is normal. |
| What thickness should I choose? |
| 2-3 mm for floor and surface protection. 4 mm is the general-purpose choice and the most commonly specified — appropriate for signage, boxes and most general applications. 5-6 mm for layer pads and load-bearing partitions, or where anti-static properties are needed. 8-12 mm for double-wall pallets and engineered panels. If you tell us the application we will recommend a thickness rather than selling you the thickest one. |
| Can you supply custom sizes, colours and printed logos? |
| Yes. Thickness 2-12 mm, any width up to 2600 mm and any length, white/black/blue/red/green/yellow/grey/orange or custom Pantone-matched colours. Printing is 1-4 colours by silk screen, flexographic or UV digital, up to 1600 × 2500 mm, on one or both sides. We can also die-cut, drill, corner-round, fold, weld and assemble the sheet into finished parts. Send a drawing, DXF or a photo with dimensions. |
| What is the minimum order quantity? |
| MOQ is 1000 pieces, and mixed sizes and colours are accepted within the same order, so you can test several grades in one shipment. Free samples in your own specification are available before any bulk order, and the sample cost is refunded when you place the first bulk order. |
| How long does production and delivery take? |
| Standard sizes: 7-12 days after sample approval. Custom printing or fabrication: 15-20 days. Samples dispatch within 3 days. Delivery from Qingdao is roughly 25-35 days to European ports, 30-40 days to North America — tell us your destination and we will confirm the freight cost and the shipping line options. |
| Are corrugated plastic sheets recyclable? |
| Yes — the sheet is mono-material polypropylene with no paper core, unlike corrugated cardboard, which has a paper liner that must be separated before the material can be recycled. PP is one of the most widely recycled plastics and can go back into the manufacturing cycle. This is also a purchasing argument in many markets where packaging waste is taxed or restricted. |
| How do I know the board is genuine PP and not recycled filler? |
| Two simple checks. First, the float test: pure PP has a density of about 0.91-0.93 g/cm³ and floats in water, while filled or recycled material sinks. Second, look at a cut section — virgin PP shows a uniform dense texture, while recycled board shows mixed-colour flecks and a porous core. We also supply third-party SGS verification on request. |
| Do you assist with export documentation and shipping? |
| Yes. We ship to 60+ countries and provide all necessary commercial documents (invoice, packing list, certificate of origin) and can recommend reliable partners. Third-party inspection (SGS, BV, TÜV) is welcome, and we will photograph and document the goods before loading. |
| How do you cut and fabricate the sheet? |
| We run 16 sets of high-precision die-cutting machines, which fully ensure the fine size and processing quality. We can cut it into specific sizes according to your requirements, and you can use it directly after receiving the goods. The sheet can also be folded, hot-bent and ultrasonically welded into boxes, trays and assembled structures. It is also easy to cut in-house with scissors, a saw or a router — no special machinery required. |
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Send us your thickness, size, quantity, application and destination port, or just upload a drawing or a photo. We will come back with a specification suggestion and a quotation. Samples are free. Shandong Flutepak Industry Co., Ltd. · No.13887 Industrial Zone, Weifang, Shandong, China · export5@runpingpp.com · +86 158 9874 0625 |
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