Twin-wall polypropylene corrugated plastic sheet in 2 to 10mm gauge. Standard 48×96 in sheets and custom cut sizes for pallet layer dividers, box liners, signage, and surface protection.
Request a Quote from ElipackoPP corrugated plastic sheet — also called twin-wall corrugated PP sheet, coroplast sheet, or flute board — is a flat-panel material manufactured from polypropylene using a continuous extrusion process. The result is a rigid, lightweight sheet with a twin-wall cross-section: two flat face skins connected by regularly spaced internal ribs running parallel to one another through the panel. This structure gives PP corrugated sheet exceptional stiffness per unit weight, and the enclosed air channels provide a measure of thermal insulation and cushioning.
Unlike paper-based corrugated or fiberboard panels, PP corrugated sheet does not absorb water, does not soften when wet, and does not degrade under repeated handling. A single PP corrugated sheet used as a pallet layer divider can replace 50, 100, or more single-use cardboard layer pads over its service life. For high-throughput distribution operations that consume thousands of cardboard layer pads per week, switching to reusable PP corrugated sheet represents a significant and recurring cost reduction.
Corrugated plastic sheet is available in a broad range of gauges — from 2mm thin-wall for lightweight applications like signage and box liners to 10mm heavy-wall for structural pallet layer pads, dividers in metal fabrication, and industrial surface protection. Sheet sizes range from standard 48×96 in (4×8 ft) panels, which are compatible with standard pallet footprints and fabrication workflows, to custom-cut sheet in any rectangular dimension.
"A 4mm PP corrugated sheet used as a pallet layer pad weighs roughly 60 to 70 percent less than a standard cardboard layer pad of the same surface area, and it handles 50 or more reuse cycles — delivering the lowest per-use cost of any layer-pad material on the market."
Reusable PP sheets replace single-use cardboard layer pads between pallet tiers. No moisture absorption. No crush under load. Standard 40×48 in cut from 48×96 in sheet stock — zero waste.
Cut-to-size PP corrugated sheet used as box base liners, sidewall reinforcements, and void-fill inserts. Rigid, lightweight, reusable. Compatible with produce, food, and industrial secondary packaging.
Lightweight, flat PP corrugated sheet is the standard substrate for temporary and semi-permanent signage, yard signs, event displays, and point-of-sale material. Printable, weather-resistant, easy to cut.
Standard sheet dimensions and gauge performance data. All sheets available in natural (translucent white), black, and custom tinted colors. Custom cut sizes and die-cut parts available from Elipacko. FDA 21 CFR food-contact grade available in virgin resin formulations.
| Gauge | Thickness | Standard Sheet Size | Approx. Weight per Sheet | Flexural Stiffness | Primary Applications | Color Options |
|---|---|---|---|---|---|---|
| 2mm | 2mm | 48×96 in | ~1.8 lb | Light | Signage, lightweight liners | Full range |
| 3mm | 3mm | 48×96 in | ~2.6 lb | Moderate | Box liners, display boards | Full range |
| 4mm | 4mm | 48×96 in | ~3.5 lb | Medium | Layer pads, box inserts, signage | Full range |
| 5mm | 5mm | 48×96 in | ~4.3 lb | Medium-high | Pallet layer pads, dividers | Full range |
| 6mm | 6mm | 48×96 in | ~5.1 lb | High | Heavy pallet dividers, protection panels | Full range |
| 8mm | 8mm | 48×96 in | ~6.5 lb | Very high | Industrial surface protection, bulk dividers | Select colors |
| 10mm | 10mm | 48×96 in | ~8.0 lb | Maximum | Structural industrial panels, floor protection | Select colors |
Standard 48×96 in sheets can be cut to any rectangular dimension using standard woodworking or sheet metal tooling. PP corrugated sheet scores and creases cleanly for fold-up box construction, tray fabrication, and tabbed inserts. Die-cut parts in custom shapes are available for high-volume applications where precision repeatability is required.
Common custom cut sizes for pallet layer pad applications include 40×48 in (GMA pallet standard), 42×42 in, 48×40 in, and 36×36 in. Custom sizes are cut from 48×96 in parent sheets at minimal or no setup cost for rectangular cuts.
Cardboard layer pads — also called tier sheets, slip sheets, or layer dividers — are placed between rows of product on a pallet to distribute weight, prevent product-to-product contact, and provide a stable surface for the next tier. They are consumed in enormous quantities in produce, beverage, brick-and-mortar retail, and food manufacturing: a single produce distribution center may consume 10,000 or more cardboard layer pads per week.
Cardboard layer pads fail in a predictable pattern. They absorb moisture in refrigerated environments, losing compression resistance and allowing the product tier above to shift or crush the tier below. They tear under forklift tine contact, particularly when wet. They generate significant volumes of waste cardboard, requiring disposal infrastructure and contributing to waste-hauling costs. And they must be purchased continuously — a pure consumable expense with no residual value.
PP corrugated sheet layer pads eliminate every one of these failure modes. A 4mm or 5mm PP corrugated layer pad cut to 40×48 in from standard sheet stock weighs under 2 lb and provides superior tier separation and load distribution compared to a cardboard layer pad. It does not absorb water. It does not tear under forklift tine contact. And it is reusable for 50 or more pallet cycles, at which point it is recyclable as resin code #5 PP.
For operations running a defined return loop — for example, a fresh produce shipper sending palletized product to a consistent set of retail distribution centers and receiving empty pallets back — implementing PP corrugated layer pads is one of the simplest and fastest-payback reusable packaging initiatives available. The layer pad pool size is typically three to four times the number of pallets shipped per cycle, to account for transit, dwell, and return time.
Corrugated plastic sheet cut to size is used as a base liner inside waxed cardboard boxes, corrugated cardboard boxes, or other secondary packaging to stiffen the box floor, protect the product from the box base, and provide a clean surface that does not contaminate product with cardboard fibers or moisture-softened paper.
In produce packing, a PP corrugated base liner inside a waxed cardboard box prevents the box base from buckling under the weight of packed product during cold-room storage — a common failure point for wax-treated cardboard in high-humidity cold rooms. The liner adds minimal weight and volume while significantly extending the functional life of the outer box.
Sidewall reinforcement panels — cut from PP corrugated sheet and inserted inside the short walls of a box — prevent wall collapse under stacking loads in taller box formats. This is a common configuration in pack-house operations where boxes are stacked six or eight high in refrigerated trucks or cold rooms.
PP corrugated sheet in 4mm to 10mm gauge is used as a temporary surface protection material in construction, installation, and event logistics applications. It protects finished flooring, countertops, and other surfaces from scratch, impact, and contamination during active work. The sheets are lightweight enough to carry by hand, rigid enough to span typical floor irregularities, and waterproof so that spills on the protection surface do not migrate to the finished floor below.
Construction applications include protection of hardwood floors, tile, and stone during interior finish work; protection of countertops and cabinetry during appliance installation; and protection of new flooring during move-in activities. Event logistics applications include floor protection under temporary staging, in exhibition halls, and on grass areas where wheeled equipment would otherwise damage turf.
PP corrugated protection panels can be cut to fit around obstacles, taped together for seamless coverage, and reused across multiple job sites. Their lightweight construction reduces the physical demand on installers compared to heavier protection materials like rubber matting or plywood underlayment.
Two-millimeter to 4mm PP corrugated sheet is the most widely used substrate for temporary signage in the United States — from real estate yard signs to political campaign signs to construction site safety boards to event directional signage. Its combination of low cost, printability, weather resistance, and ease of cutting and forming makes it the default choice for signage that must survive outdoor conditions for days to months.
PP corrugated sheet for signage applications is typically extruded with a smooth, white or black outer surface that accepts UV-cure solvent inkjet printing, screen printing, and vinyl lamination. When properly printed and stored, PP corrugated signage panels maintain legibility and structural integrity through rain, temperature variation, and moderate wind loading.
For reusable signage programs — trade shows, recurring events, retail point-of-purchase displays — PP corrugated sheet in 4mm or 5mm gauge with UV-cure printing is specified for its ability to withstand multiple installations, handling cycles, and storage between events without surface degradation.
In metal fabrication, automotive assembly, and parts kitting operations, PP corrugated sheet dividers protect precision components from scratch and contact damage during transport and storage. Unlike cardboard dividers, which crush and lose their separating function under the weight of dense components, PP corrugated dividers maintain their rigidity and protection function through multiple handling cycles.
Agricultural applications include greenhouse bench liners — PP corrugated sheet placed on metal growing benches to protect plant trays from the bench surface and to retain moisture — and field-use flat trays for seedling transport. The waterproof surface and resistance to fertilizer solutions make PP corrugated sheet superior to any paper-based alternative in wet agricultural environments.
The economics of switching from cardboard layer pads to reusable PP corrugated sheet are compelling and calculable. Consider a distribution operation that currently uses 5,000 cardboard layer pads per week at a purchase cost of $0.35 each. That is $1,750 per week, $91,000 per year, plus disposal costs for 5,000 pieces of used cardboard weekly.
A pool of 15,000 PP corrugated layer pads (3× the weekly usage, to cover transit, dwell, and return cycles) purchased at $6 per pad represents a $90,000 capital investment — equivalent to just under one year of cardboard spend, before disposal cost savings. With a 50-trip service life, each PP pad's total cost over its life is $0.12 per trip — less than one-third the cost of a single cardboard layer pad. The pool pays back within the first year of use, and the recurring savings continue for the life of the pads.
Elipacko works with distribution and manufacturing operations to design PP corrugated layer pad programs, including sheet selection, pool sizing, and return logistics planning. Contact us at elipacko.com to receive a customized cost-benefit analysis for your operation.
Standard 48×96 in sheets and custom cut sizes in 2–10mm gauge. Pallet layer pads, box liners, signage, and surface protection. Waterproof, reusable, cost-effective.
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