Aluminium foil and polyester film composition steel-plastic composite tape is a type of tape used for shielding and wrapping of cables. It is made up of several layers, including a layer of aluminium foil, a layer of polyester film, and a layer of steel-plastic composite material. The aluminium foil provides excellent shielding against electromagnetic interference (EMI) and radio frequency interference (RFI), while the polyester film provides strength and durability. The steel-plastic composite layer provides additional strength and resistance to moisture, chemicals, and abrasion. This type of tape is commonly used in the electronics and telecommunications industries for cable wrapping and shielding.