3mm clear PETG sheet is a heavy-gauge transparent thermoplastic sheet used for applications that require substantial structural rigidity, high impact resistance, and optical clarity in a single material. At 3mm, PETG sheet is stiff enough to serve as a self-supporting panel, protective guard, or structural fabrication component - placing it firmly in the fabrication and industrial category rather than the thin-gauge packaging range.
Buyers searching specifically for 3mm PETG are typically looking for a rigid, clear panel material for machine guards, display fabrication, protective barriers, thermoformed housings, or architectural glazing - applications where thinner gauges would flex too much and where glass or acrylic may pose shatter or weight concerns.
ONE Plastic manufactures 3mm PETG sheet as part of our broader PETG sheet product range. We supply this thickness in both roll and cut-sheet format to fabricators, thermoformers, display producers, and industrial buyers.
Material: PETG (glycol-modified polyethylene terephthalate)
Thickness: 3mm
Transparency: High clarity, glossy surface
Density: 1.27 g/cm³
Standard Sheet Size: 915 x 1220 mm, 1000 x 2000 mm, or custom
Roll Width: 300mm - 1400mm (for roll-form supply)
Colors: Clear (standard); colored, white, and black available on request
Key Properties: Impact resistant, no stress-whitening, thermoformable, CNC-routable, chemical resistant
Why Choose 3mm PETG?
Heavy-Duty Rigidity: 3mm is the threshold where PETG sheet transitions from a semi-flexible material to a genuinely rigid panel. At this thickness, PETG is self-supporting at larger panel sizes and provides enough stiffness for machine guards, protective barriers, and freestanding display components without backing or framing.
Impact Resistant Without Shattering: PETG does not shatter on impact - it absorbs energy and flexes rather than cracking. At 3mm, this impact resistance is substantial enough for safety-critical applications like machine guards, protective shields, and barrier panels where glass would pose a shatter hazard.
Still Thermoformable: Unlike acrylic, which becomes difficult to thermoform at thicker gauges without specialized equipment, 3mm PETG still forms well on standard vacuum and pressure forming equipment. This makes it practical for thermoformed housings, enclosures, and structural packaging that require both rigidity and three-dimensional shaping.
Excellent for CNC Fabrication: 3mm PETG routes, drills, saws, and polishes cleanly on standard CNC and workshop equipment. The material produces smooth, consistent machined edges that can be flame-polished for a finished appearance.
Better Impact Performance than Acrylic: At 3mm, PETG offers significantly higher impact resistance than acrylic (PMMA) of the same thickness. For applications where the panel may be bumped, hit, or stressed during use, PETG is the safer choice.
Lighter than Glass: 3mm PETG weighs roughly half of what 3mm glass would weigh, making it easier to handle, ship, and install in display and glazing applications.
3mm vs. Other PETG Thicknesses
| Factor | 1.0mm - 1.5mm PETG | 3mm PETG | 4mm - 6mm PETG |
| Rigidity | Semi-rigid - needs support at larger sizes | Rigid - self-supporting panel material | Very rigid - heavy-duty structural |
| Primary Use | Displays, covers, light thermoforming | Machine guards, fabrication, heavy thermoforming, glazing | Heavy structural panels, thick machine guards |
| Thermoforming | Standard forming | Good - structural parts with consistent wall thickness | Possible but requires more heat and forming pressure |
| CNC Fabrication | Possible but thin | Good - clean edges, good for routing and drilling | Good |
| Weight per m² | ~1.3 - 1.9 kg | ~3.8 kg | ~5.1 - 7.6 kg |
| Cost per m² | Lower | Moderate | Higher |
| Best For | Display fabricators, light-duty covers | Industrial fabricators, thermoformers, safety applications | Heavy industrial, thick structural panels |
For thinner PETG for display and light fabrication, see our 1.5mm PETG sheet page. For colored variants at 3mm, see our colored PETG sheets range.
Applications of 3mm Clear PETG Sheet
Machine Guards and Safety Shields
3mm PETG is widely used for machine guards, safety barriers, and equipment enclosures in manufacturing and industrial environments. Its impact resistance and shatter-proof behavior make it preferable to glass or acrylic for safety-critical applications where the panel may be struck by tools, parts, or equipment.
Display Fabrication
Fabricated display components, retail fixtures, exhibition elements, and POS structures where the material needs to be rigid, clear, and capable of being CNC-routed, bent, and bonded into assembled units.
Thermoformed Housings and Enclosures
3mm PETG thermoforms into rigid three-dimensional parts on standard vacuum and pressure forming equipment:
Equipment enclosures and covers
Medical device housings
Electronic device cases
Industrial protective covers
Custom thermoformed trays for heavy products
Architectural and Interior Glazing
Interior partitions, sneeze guards, protective screens, and glazing panels where glass is too heavy or poses a shatter risk. 3mm PETG provides comparable clarity to glass at roughly half the weight.
Protective Barriers
Checkout screens, reception barriers, service counter shields, and similar protective installations where a clear, impact-resistant panel is needed.
Specifications
| Parameter | Specification |
| Material | PETG (glycol-modified polyethylene terephthalate) |
| Thickness | 3mm |
| Density | 1.27 g/cm³ |
| Light Transmission | Typically 88-90% |
| Impact Resistance | High - does not shatter |
| Stress Whitening | None - maintains clarity through bending and forming |
| Standard Sheet Size | 915 x 1220 mm, 1000 x 2000 mm, or custom |
| Roll Width | 300mm - 1400mm (for roll-form supply) |
| Surface Finish | Glossy on both sides |
| Color | Clear (standard); colored, white, black on request |
| Chemical Resistance | Resists oils, greases, dilute acids, many household chemicals |
| Recyclable | Yes (PET family) |
Processing 3mm Clear PETG Sheet
Thermoforming
| Parameter | Guideline |
| Forming Temperature | 80-120°C |
| Mold Temperature | 40-65°C |
| Pre-drying | Recommended: 65°C for 2-4 hours |
| Forming Window | Wide - more forgiving than APET |
| Deep Draw | Good at 3mm - produces rigid structural parts |
Pre-drying is recommended to prevent moisture-related defects during forming.
CNC Fabrication
| Method | Notes |
| CNC Routing | Good - 3mm produces clean, consistent routed edges |
| Circular Saw | Use fine-tooth blades; steady feed rate |
| Drilling | Standard drill bits; moderate speed to avoid overheating |
| Edge Polishing | Flame polishing or mechanical polishing for finished edges |
Bending
3mm PETG can be heat-bent using a strip heater. The material bends without stress-whitening at the bend line, maintaining clarity through the bend - an advantage over acrylic which can crack at this thickness.
Bonding
PETG bonds well with solvent cement (PET/PETG specific), UV-cure adhesive, and cyanoacrylate. For fabricated display and enclosure assembly, solvent cement typically produces the strongest, most optically clear joints.
Why Choose ONE PLASTIC?
Full PETG Thickness Range: We manufacture PETG sheet from 0.15mm to 6mm. Whether you need thin packaging film or thick fabrication plate, we supply from a single factory.
Virgin Resin: We use quality resin to help ensure consistent clarity, impact performance, and forming behavior.
ISO 9001 Certified: Batches are tested for thickness tolerance, optical clarity, impact strength, and surface quality before shipment.
Custom Sheet Sizes: Beyond standard sizes, we supply custom cut-to-size 3mm PETG sheet to reduce waste in your fabrication process.
Factory-Direct Pricing: As a manufacturer with dedicated PETG extrusion lines, we offer competitive pricing for both large-volume and smaller custom orders.
Packaging and Delivery
| Item | Details |
| Sheet Packaging | PE film interleave + pallet with corner protectors |
| Roll Packaging | PE inner wrap + kraft paper + PP belt strapping; palletized |
| Pallet Load | Typically 500-1,000 kg per pallet |
| Lead Time | Typically 7-15 days after order confirmation |
| Shipping | Sea freight (FCL & LCL), air freight, or land transport |
| Marks | Neutral packing; custom printed marks available |
Frequently Asked Questions
Why choose 3mm PETG instead of 2mm or 4mm?
3mm is the most common heavy-gauge PETG specification for fabrication and industrial applications. At 2mm, PETG is still semi-flexible at larger panel sizes. At 4mm+, the material becomes heavier, more expensive, and harder to thermoform. 3mm provides the practical threshold of rigid, self-supporting panel behavior while remaining workable on standard fabrication and forming equipment.
Is 3mm PETG better than 3mm acrylic?
PETG offers significantly higher impact resistance than acrylic at the same thickness - it does not shatter on impact. Acrylic offers slightly better optical clarity and scratch resistance. For safety-critical applications (machine guards, protective barriers), PETG is generally the better choice. For applications where surface hardness and scratch resistance matter more, acrylic may be preferred.
Can 3mm PETG be thermoformed?
Yes. 3mm PETG forms well on standard vacuum and pressure forming equipment at 80-120°C. It is one of the thicker gauges that still thermoforms reliably, making it suitable for rigid housings, enclosures, and structural thermoformed parts. Pre-drying is recommended.
Can I print on 3mm PETG?
Yes. The smooth, glossy surface is compatible with UV printing and screen printing. 3mm PETG is used for printed sign panels, graphic overlays, and back-printed display pieces where the print is viewed through the sheet.
What is the minimum order quantity?
Contact our sales team for current MOQ based on your required sheet size, color, and quantity.
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