ʻO ka uea i uhi ʻia ka pepa, ʻo ia ka uea o ke koʻokoʻo keleawe ʻole oxygen a i ʻole ke koʻokoʻo alumini uila i hoʻokuʻu ʻia a huki ʻia paha e kekahi ʻano kikoʻī, a ua uhi ʻia ka uea wili e kekahi mea insulating kikoʻī.ʻO ka uea Composite he uea wili i hana ʻia me nā uea wili a i ʻole nā uea keleawe a me nā alumini i hoʻonohonoho ʻia e like me nā koi i ʻōlelo ʻia a ʻōwili ʻia e nā mea insulating kikoʻī.Hoʻohana nui ʻia i ka ʻaila - transformer immersed, reactor a me nā mea uila ʻē aʻe.
Hoʻokumu ʻia ia ma nā koi o ka mea kūʻai aku, ʻoi aku ma mua o 3 mau ʻāpana o ka pepa kraft a i ʻole ka pepa miki i ʻeha ma ka alumini a i ʻole ke kalaiwa keleawe.ʻO ka uea i uhi ʻia i ka pepa maʻamau he mea kūikawā no ka ʻaila immersed transformer coil a me nā wili uila like, ma hope o ka impregnation, ʻo 105 ℃ ka helu wela o ka lawelawe.E like me nā koi o ka mea kūʻai aku, hiki ke hana ʻia e ka pepa kelepona, ka pepa uwea, ka pepa miki, ka pepa uila uila kiʻekiʻe, ka pepa insulation high density, etc.