Na'urorin lantarki na filastik da ake amfani da su wajen gina na'urorin lantarki na ƙarfe sun haɗa da polypropylene (PP), polyphenylene sulfide (PPS), polyester, da takarda mai ƙarfe (MP). Waɗannan kayan lantarki suna da iyawar warkar da kansu daban-daban.

Idan aka samu matsala a cikin wani ƙarfe mai ƙarfin ƙarfe, arcing yana sa siririn ƙarfe da ke kewaye da yankin lahani ya yi tururi. Wannan tsarin tururi yana cire layin ƙarfe mai ƙarfin lantarki a yankin da ke kewaye da lahani. Tunda an cire kayan mai ƙarfin lantarki, ba za a iya samun ɗan gajeren da'ira tsakanin faranti ba. Wannan yana hana lalacewar ɓangaren.

Ikon warkar da kai na na'urar ɗaukar fim mai ƙarfe ya dogara ne da abubuwa da yawa, ciki har da halayen kayan dielectric da kauri na layin ƙarfe. Tsarin tururi yana buƙatar isasshen iskar oxygen da kayan dielectric masu yawan iskar oxygen a saman suna da kyawawan halaye na warkar da kai. Wasu daga cikin na'urorin dielectric na filastik waɗanda ke da kyawawan halaye na warkar da kai sun haɗa da polypropylene, polyester da polycarbonate. A gefe guda kuma, na'urorin dielectric na filastik waɗanda ke da ƙarancin iskar oxygen a saman suna da ƙarancin halaye na warkar da kai. Polyphenylene sulfide (PPS) ɗaya ne daga cikin irin waɗannan kayan dielectric.

Baya ga inganta aminci, ikon warkar da kai na na'urorin ƙarfe masu ƙarfin ƙarfe yana taimakawa wajen inganta rayuwarsu ta aiki. Duk da haka, warkar da kai yana haifar da raguwar yankin lantarki mai ƙarfin ƙarfe akan lokaci.

A aikace-aikace, wasu daga cikin yanayin da zai iya hanzarta gazawar wani abu sun haɗa da yanayin zafi mai yawa, ƙarfin lantarki mai yawa, walƙiya, zafi mai yawa, da tsangwama na lantarki (EMI).

Baya ga kyawawan halaye na warkar da kai, capacitors ɗin fim ɗin polyester masu ƙarfe suma suna da babban daidaiton dielectric, kyakkyawan kwanciyar hankali a zafin jiki, ƙarfin dielectric mai yawa, da ingantaccen aiki mai girma. Waɗannan halaye sun sa waɗannan capacitors ɗin suka dace da aikace-aikacen gabaɗaya. Ana amfani da capacitors ɗin polyester masu ƙarfe sosai don aikace-aikacen DC kamar toshewa, wucewa, cire haɗin kai, da kuma rage hayaniya.

Masu ƙarfin polypropylene masu ƙarfe suna ba da juriya mai ƙarfi ga rufin, ƙarancin shaƙar dielectric, ƙarancin asarar dielectric, ƙarfin dielectric mai yawa, da kwanciyar hankali na dogon lokaci. Ana amfani da waɗannan abubuwan da suka dace da sararin samaniya sosai a aikace-aikacen da aka haɗa da manyan abubuwa kamar da'irar tacewa, ballasts masu haske, da da'irar snubber. Masu ƙarfin polypropylene masu ƙarfe biyu na iya jure babban ƙarfin lantarki da nauyin bugun jini mai yawa, kuma sun dace da aikace-aikace tare da babban yuwuwar bugun jini mai tsayi. Ana amfani da waɗannan masu ƙarfin lantarki akai-akai a cikin masu sarrafa motoci, masu ƙarfin lantarki, kayan wutar lantarki na yanayin sauyawa, da masu saka idanu.