Dharka heerkulku sareeyo ee PTFE (Fiberglass-dahaarka leh ee PTFE) waxay leedahay iska caabin kulayl heersare ah oo heersare ah oo u dhexeeya inta u dhaxaysa -70°C ilaa 260°C. Waxay u adkaysan kartaa baaskiil wadida heerkulka degdega ah, tusaale ahaan, ka guurista qaboojiyaha -50°C una guurto cadaadis kulul oo 260°C ah. Heerarka qiimaha leh xitaa waxay ka badbaadaan qaboojin degdeg ah 260°C ilaa 10°C biyo ah. Si kastaba ha ahaatee, ka nixin walxaha heerkul ka sarreeya 300 ° C (oo u dhow PTFE's 327 ° C barta dhalaalka) waxay keeni doontaa dillaac degdeg ah iyo delamination. Substrate-ka fiberglassku wuxuu bixiyaa xasilloonida cabbirka; daahan PTFE waa qodobka xaddidaya.

Dharka heerkulka sare ee PTFE waxaa si ballaaran loo isticmaalaa warshadaha kiimikada ee toddobada codsiyo muhiim ah: flange gaskets iyo dahaarka tuubada (iska caabiya acids / alkalis xoog leh), reactor iyo dahaarka taangiga (hortagga daxalka biraha, nadiifinta fudud), bacaha filter gaaska daxalka ah (ilaa 260 ° C), kala-goysyada ballaarinta maro koronto, anti-padssion. daboolka dahaadhka. FDA iyo UL darajooyin la heli karo.

Dharka heerkulka sare ee PTFE waa xasiloon ilaa 300 ° C, laakiin dabku wuu jajabiyaa oo sii daayaa gaasaska sunta ah: hydrogen fluoride (HF) (corrosive, bararka sambabada) iyo perfluoroisobutylene (PFIB) (midab la'aan, ur la'aan, ~ 10x ka badan sunta fosgene, ma jiro daawo ka hortag ah). Sidoo kale kaarboon monoxide, hadhaaga PFOA, iyo raad dioxins. Maaskarada qiiqa caadiga ah waa kuwo aan waxtar lahayn; adeegso qalabka neefsashada ee iskaa ka kooban (SCBA). Calaamadaha waxaa laga yaabaa in dib loo dhigo.

Walaxaha dhamaystiraya dusha sare ee lagu dabaqo marada fiberglass ka hor inta aan daahan PTFE muhiim u ahayn waxqabadka PTFE ee ugu dambeeya ee maro heerkul sare ah. Wakiilada isku xidhka Organosilane waxay abuuraan buundooyin molecular oo u dhexeeya fiber galaas ah oo aan organic ahayn iyo PTFE organic, kor u qaadaya xoogga diirka <2 N/cm ilaa 4-8+ N/cm. Daawaynta saxda ah waxay sidoo kale wanaajisaa caabbinta kulaylka (260°C+), waxqabadka dielectric, iyo caabbinta kiimikada. Dharka aan la daweynin waxay horseedaa delamination, xumbo, iyo nolol adeeg oo gaaban.

Nadiifinta saxda ah iyo dayactirka saxda ah waxay kordhisaa nolosha dharka heerkulka sare ee PTFE. Nadiifi isticmaalka ka dib iyo qaboojinta ka dib. Isticmaal burush jilicsan, saabuun dhexdhexaad ah, ama aalkolo wasakhda. Weligaa ha isticmaalin asiidh/alkalis xoog leh, warankiilo, ama xoqo bir ah. Saliida silikoonka ee joogtada ahi waxay yaraynaysaa xidhashada. Raac tilmaamahan si aad uga hortagto dhaawaca dahaarka.