Acrylic vs PETG vs Polycarbonate: Choosing a Display Material

Most display briefs arrive with the material already decided, and the decision is usually inherited rather than reasoned. Somebody specified acrylic last time, so acrylic goes on this one. Or a buyer who lost a run to cracking in transit swings to polycarbonate, then spends the season looking at a fixture covered in scuff marks.

Acrylic, PETG and polycarbonate are the three clear plastics that make up almost all retail display work, and they fail in completely different ways. Clarity, scratch resistance and impact resistance pull against each other — no one of the three wins on all three counts, and the material that survives your particular store environment depends on who touches the fixture, what they clean it with, and how much sunlight lands on it. This guide sets out the trade-offs in the terms a display buyer actually has to decide on, and where each material belongs.

The short version

Read that as trade-offs rather than a ranking. Acrylic wins on what a shopper sees; polycarbonate wins on what a shipping carton and a busy aisle do to a fixture; PETG sits between them and is the only one that bends cold.

Clarity and edge finish: where acrylic is not replaceable

Acrylic transmits more visible light than ordinary glass and holds that clarity over years of indoor use. More importantly for display work, a cut acrylic edge can be flame-polished or diamond-polished until it reads as solid glass. That polished edge is the entire visual argument for a premium counter unit: the light pipes through the sheet and the perimeter glows.

Neither PETG nor polycarbonate reproduces that. PETG edges can be cleaned up but stay comparatively matt; polycarbonate resists a true optical polish and tends to look milky at the cut line. If the design brief includes a floating shelf, a chunky riser, an illuminated logo block or anything where the edge is a feature rather than a necessity, acrylic is not a preference — it is the specification, and swapping material later will visibly change the product.

There is a second-order effect worth knowing. Acrylic sheet comes as cast or extruded. Cast sheet machines and polishes more predictably and handles laser cutting better, so it tends to be the choice where edges and engraving are visible; extruded sheet is cheaper, holds tighter thickness tolerance and thermoforms more easily. Ask which one your quotation assumes, because a quote built on extruded sheet and a sample made from cast sheet will not match on the edge.

Impact: what actually breaks, and where

Acrylic is the brittle one. It does not dent or deform under a knock — it chips at the corner or runs a crack from a drilled hole. That is why the damage report on an acrylic programme almost always describes corner chips and star cracks around fixings rather than crushed panels, and why the failure usually happens between the factory gate and the shop floor rather than in use.

Two design decisions drive most of that loss, and neither is a material problem. Acrylic is notch-sensitive, so a sharp internal corner or an undersized, un-relieved fixing hole concentrates stress and becomes the crack origin. And acrylic assemblies fixed rigidly to a metal or timber base with no allowance for movement will craze as the two materials expand at different rates. Radius the internal corners, oversize the holes and use a shouldered fixing, and a large part of the breakage disappears without changing material at all.

Where genuine impact energy is unavoidable — a security cover, a fixture in a high-traffic aisle, anything at child height that will be leaned on — polycarbonate is a different order of tough and is the honest answer. PETG is the middle position and is frequently the right one: appreciably tougher than acrylic, far cheaper than polycarbonate, and good enough for a fixture that has to survive parcel shipping to individual stores rather than palletised delivery to a distribution centre. Packing carries at least as much of this risk as material choice does; the general principles are in the guide to sourcing packaging in China.

Scratching and cleaning: the failure nobody specifies for

Scratch resistance runs in the opposite direction to impact resistance. Acrylic has the hardest surface of the three, polycarbonate the softest. An uncoated polycarbonate face panel in a cosmetics aisle looks tired within a season, because every shopper who touches it and every staff member who wipes it leaves a mark that never comes out.

The cleaning question deserves its own line in the specification, and it is the one nobody asks. Both acrylic and polycarbonate are vulnerable to crazing — a fine web of surface cracks — when exposed to the wrong solvents while under stress. Store teams do not read material specifications. They use whatever spray is under the counter, and in a post-2020 retail environment that is frequently an alcohol wipe. PETG tolerates that regime noticeably better, which is a large part of why it turned up on so many point-of-purchase fixtures for high-touch categories.

If the fixture will be wiped daily — a vape or convenience counter unit, a tester stand, anything in food service — either move to PETG, specify a hard-coated grade, or supply a printed cleaning instruction with the fixture and accept that it will sometimes be ignored. Display types with the heaviest handling are discussed in the guides to vape display stand and POS design and acrylic displays for 3C electronics retail.

Sunlight and heat

Acrylic is the outdoor material of the three by a wide margin: inherently stable under ultraviolet light, holding colour and clarity through years of direct sun, which is why it is the default for illuminated signage and window work.

Polycarbonate yellows under sustained ultraviolet exposure unless it is a UV-stabilised or coated grade, and PETG is not a long-term outdoor material at all. A fixture in a street-facing window, an atrium or outside an entrance should be acrylic unless there is a specific reason it cannot be. Heat runs the other way: polycarbonate has the highest service temperature and tolerates being built tight against a hot light source, though LED lighting has made that constraint far less common.

Fabrication changes the price as much as the material does

Material cost is only part of a display quotation. Processing often matters more, and the three behave differently on the same machines.

• Laser cutting. Acrylic lasers beautifully and comes off the bed with a polished edge, which removes a finishing step. PETG lasers but the edge quality is inconsistent, so parts are often routed instead. Polycarbonate lasers badly, discolouring at the cut, and is normally routed — which is slower and adds an edge-finishing operation.
• Forming. PETG cold-bends and thermoforms readily, and deep draws well. Acrylic needs line bending or thermoforming with controlled heat. Polycarbonate absorbs moisture and generally has to be dried before forming, or it blisters.
• Bonding. Solvent cementing gives acrylic joints that all but disappear, and UV-cure adhesives take it further. Polycarbonate is the awkward one: several common adhesives and cleaners induce stress cracking at bonded joints, so mechanical fixing is often safer.
• Decoration. All three take screen and UV printing, but ink adhesion and pre-treatment differ. If artwork is critical, ask for the printed sample on the actual production material rather than on whatever sheet is on the bench.

This is why a material change late in a programme is rarely a like-for-like swap. It can move you from lasering to routing, add a polishing operation, invalidate a bonding method and change the tooling. Where thermoforming or a jig is involved, the sunk cost sits in the tooling, discussed in tooling and mould costs in China manufacturing.

Choosing by use case

Getting the material into the RFQ

Material belongs in the request for quotation, not in the follow-up email. Specify the material and grade, the sheet type where it matters (cast or extruded acrylic), thickness for each part rather than for the fixture as a whole, the edge treatment, the bonding method, and the cleaning regime the fixture will face. A quotation that does not name the sheet type is not comparable with one that does, and the cheaper of the two is usually the one that left something out. The structure of a complete brief is set out in the acrylic display RFQ template, and the wider selection process in how to source acrylic displays from China.

Settle the material before sampling, because a sample in the wrong sheet answers the wrong question. Then check the production run against the approved sample on the specific points material choice governs: edge finish, joint appearance and thickness. That comparison belongs in a pre-shipment inspection, covered in product inspection before shipment, and the sample-to-production sequence in the sample order process and the sample-to-mass-production timeline.

On the supply side, most Chinese display workshops are acrylic specialists rather than general plastics fabricators, so the practical question to ask is which materials a given factory runs routinely rather than which it will accept an order for. Yixinheng in Pingshan, Shenzhen is a representative example: twenty-six years of manufacturing experience, build-to-order custom work across cosmetic, vape and 3C electronics display, complete in-house equipment, seven-day rapid prototyping and a minimum order quantity of one. Its products are recorded under HS heading 3926 — other articles of plastics — though the destination-country subheading should be confirmed with a customs broker, since the ten-digit line is national. Quantity and lead-time expectations for the category are discussed in acrylic display MOQ negotiation and acrylic display lead times and prototyping, factory selection in the Shenzhen acrylic display manufacturer sourcing guide and the roundup of acrylic display manufacturers in China, and the import side in importing acrylic displays from China to the USA.

Common questions

Which is better for a retail display, acrylic or polycarbonate?

Acrylic is better for almost all retail display work, because it is clearer, resists scratching far better and can be polished to a glass-like edge. Polycarbonate is only the right answer when impact resistance is the governing requirement — security covers, child-height fixtures or high-traffic aisles — and you are prepared to accept a surface that marks easily.

Is PETG stronger than acrylic?

Yes, in impact terms. PETG absorbs a knock that would chip or crack acrylic, and it can be bent cold without cracking, which acrylic cannot. The trade-offs are a softer surface that scratches more readily, edges that cannot be polished to the same clarity, and poor resistance to sustained sunlight, so PETG is a poor choice for window displays.

Why do acrylic displays crack in transit?

Usually because of design detail rather than the material. Acrylic is notch-sensitive, so sharp internal corners and tight, un-relieved fixing holes concentrate stress and become crack origins under handling. Rigid fixing to a base of a different material adds thermal stress. Radiused corners, oversized holes with shouldered fixings and packing that isolates the corners eliminate most transit breakage.

Which display material handles alcohol wipes best?

PETG. Both acrylic and polycarbonate are prone to crazing — a web of fine surface cracks — when exposed to alcohol and similar solvents while the part is under stress, and store teams clean with whatever is available rather than what the specification says. For a counter unit wiped daily, either specify PETG, use a hard-coated grade, or supply written cleaning guidance with the fixture.

What should an acrylic display quotation specify?

It should name the material and grade, whether the acrylic is cast or extruded, the thickness of each part rather than the fixture overall, the edge treatment, the bonding method and any printing or decoration. Quotations that omit sheet type are not comparable with those that include it, and the cheaper of two such quotes is normally the one that left something out.