Polymethyl Methacrylate (Acrylic) Plates, Sheets, Film & Strip

Flame-retardant PMMA sheet (3920515050) is separated from standard rigid PMMA (3920515090) because fire-rated acrylic commands a distinct commercial market — particularly in building codes, transportation interiors, and display applications — and the additive treatment can affect both value and end-use eligibility. Importers should obtain a flame-retardancy certification (such as UL 94 or ASTM E84 test results) from the manufacturer to support classification under the flame-retardant line.

Flexible PMMA sheet has its own dedicated line (3920511000), separate from the rigid and flame-retardant variants. Flexibility is typically determined by the sheet's thickness and formulation — thin-gauge PMMA film used in optical or decorative applications is more likely to qualify as flexible. Importers should document the thickness, modulus, and any flexibility test data from the manufacturer to support the flexible subheading if claimed.