Hana ʻia ka papa hoʻohui uila uila me ka multi-layer composite o ke kiʻekiʻe-mehana adhesive i uhi ʻia me ka polyester film.Loaʻa iā ia nā waiwai mechanical maikaʻi, nā waiwai uila, shrinkage, hygroscopicity a me ke kūpaʻa wela hilinaʻi.Hoʻohana nui ʻia no ka transformer maloʻo kiʻekiʻe a haʻahaʻa haʻahaʻa.Hiki ke hoʻohana ʻia ka insulation ma waena o nā coils e like me ka insulating cylinder a me ka hopena insulation ma kahi o ka epoxy resin board, phenolic resin board.