A PETG face shield visor is a single-use medical consumable in most of the world, which means every decision is about cost per thousand against one non-negotiable requirement: the wearer must see clearly.
A converter in Guangzhou produced 2 million visors in a season. The first batch used a standard grade of 0.3 mm PETG and the complaints were not about breakage but about distortion: staff reported a slight blur at the edges of vision.
PETG face shield visor sheet specification
- Disposable: 0.25 to 0.3 mm, optical grade
- Reusable: 0.4 to 0.5 mm, hard coated
- Thickness tolerance: within plus or minus 5 percent
- Cut: die cut for volume, laser for short runs
Thickness tolerance is what makes a visor optically neutral. A sheet varying by 15 percent across its width forms into a surface that refracts unevenly, and the wearer perceives that as blur rather than as a defect.
Forming, anti-fog and the headband interface
A visor is formed to a simple cylindrical curve, so the forming is straightforward; the risk is over-heating, which leaves a surface that reads as orange-peel under a light. Form at the low end of the window and check a sample against a straight grid.
Fog is the usability issue. An anti-fog coating applied after forming gives the strongest effect but adds a process step; an additive in the sheet survives forming and is cheaper but fades over a long shift. For clinical use, coating wins.
The headband interface is where visors fail in service. A punched slot with a 6 mm clearance around the pin allows the visor to pivot without tearing; a tight punch splits at the slot end within a shift.
For the food and clinical compliance paperwork on the base sheet, the PETG FDA compliance guide covers the declarations, and the forming window is set out in PETG thermoforming.
Send your visor drawing, annual volume and fog requirement to oversales@rpplexiglass.com for a sheet and forming quote.
Frequently Asked Questions
What thickness PETG for a face shield visor?
0.25 to 0.3 mm for disposable visors, 0.4 to 0.5 mm for reusable ones. Thicker sheet holds shape better but adds weight on the headband and cost per unit.
Why do visors distort vision?
Curvature plus optical grade. A visor formed from sheet with poor thickness tolerance acts like a weak lens. Specify optical-quality PETG and check a formed sample against a grid before approval.
How do you stop a visor fogging?
An anti-fog coating on the inside face, or a PETG grade with an anti-fog additive. The coating is applied after forming; an additive survives forming but is less effective over a long wear period.