https://www.maximizemarketresearch.com/market-report/global-aluminium-composite-panels-market/24129/

Aluminum Composite Panels are made by sandwiching a non-aluminum core between two metal sheets. Low-density filler, often polyethylene, and a range of materials with thicknesses between 3 and 6 mm make up the composite panels. Aluminum composite panels are lightweight and inexpensive, and they may be cut or molded to any form or size.