Itheyiphu ye-PTFE yokushisa okuphezulu isetshenziswa kuzo zonke izigaba ezintathu zohlelo lokusebenza lwezokwelapha: ukuvikelwa kwemishini yokuvala inzalo (amathreyi e-autoclave, ukupakishwa kwe-heat-seal), ukwelashwa kwendawo yensimbi (i-low-friction coating, insulation kagesi), kanye namadivayisi afakelwayo (ama-vascular grafts, sutures). I-Biocompatibility iqinisekiswa nge-ISO 10993, futhi i-FDA 21 CFR 177.1550 isungula ukuphepha kwezinto eziyisisekelo.

Itheyiphu yokushisa ephezulu ye-PTFE inokumelana okungekuhle emisebeni ye-ionizing. Ngokuchayeka kwe-gamma engu-1 kGy kuphela, amandla e-tensile ehla aze afike ku-~25% owangempela. Ifaneleka kuphela ezindaweni ezinedosi ephansi (ukuvalwa kokudla/kwezokwelapha <10 kGy). Embonini yenuzi noma imikhumbi-mkhathi, sebenzisa i-polyimide noma i-PEEK esikhundleni salokho.

Kumateyipu e-PTFE aphezulu okushisa ngaphansi kokucwiliswa isikhathi eside, i-PTFE substrate ihlala ingasebenzi ngamakhemikhali, kodwa isendlalelo sokunamathisela iphoyinti elibuthakathaka. Amanzi enza buthaka i-PSA ye-silicone; amanzi anosawoti asheshisa ukugqwala. Ngamakhemikhali anolaka, i-fluorosilicone noma i-perfluoropolyether adhesives - noma i-PTFE tape enganamatheli - iyadingeka. Peel ukulahlekelwa amandla kufika ku-40% ngemva kwamahora angu-48 emanzini.

Itheyiphu yezinga lokushisa eliphezulu ye-PTFE esetshenziswa ezinhlelweni zokuxhumana zokudla kufanele ihlale ngaphakathi kwemikhawulo ebekiwe yokushisa: ≤260°C ukuze isetshenziswe ngokuqhubekayo, ≤300°C ngeziqongo ezimfushane (amaminithi), futhi ingalokothi ibe ngaphezu kuka-327°C (ukubola). Imithetho ye-FDA ne-EU ayicacisi umkhawulo wesikhathi ojwayelekile - ubude bokuxhumana obuphephile buncike ezingeni lokushisa futhi kufanele kuqinisekiswe izivivinyo zokufuduka ezilingisa izimo zangempela.

Itheyiphu ye-PTFE yokushisa okuphezulu idinga isitoreji esifanele ukugcina ukunamathela kwayo, ukuguquguquka, nokusebenza kokukhishwa. Izidingo ezibalulekile zifaka ukulawulwa kwezinga lokushisa (10-30°C), umswakama ongaphansi kuka-60%, ukugwema ukukhanya, ukuhlukaniswa kwamakhemikhali, ukubekwa okuqondile, kanye nokukhipha umoya. Landela ukuphathwa kwe-inventory ye-FIFO futhi uhlole njalo.

Ukukhetha itheyiphu elungile ye-PTFE yokushisa okuphezulu kombhede oshisayo wephrinta ye-3D kudinga ukugxila ezinkomba ezine ezibalulekile: ukumelana nezinga lokushisa (kufika ku-260°C+), i-fiberglass-reinforced substrate (0.18mm ekahle), i-silicone enamathelayo esekelayo enendawo enganamathelanga phezulu, nobubanzi/ukubekezela okufanele. Lo mhlahlandlela ukusiza ukuthi ugweme ukungqubuzana, izinsalela, nokuhluleka kokuphrinta.

Izinga lokushisa lengilazi (Tg) lokunamatheliswa kwe-silicone elizwela ukucindezela licishe libe ngu-120°C – liphansi kakhulu kunezinto zokunamathisela ze-acrylic. Le Tg ephansi kakhulu igcina itheyiphu ye-PTFE yokushisa okuphezulu ivumelana nezimo futhi inamathela ngisho naku -70°C, ivimbela ukuqhekeka okuphukayo futhi ivumela ukunamathela okuthembekile ezinhlelweni ze-cryogenic.

Itheyiphu ye-PTFE yokushisa ephezulu ingaqhekeka noma iphuke ngaphansi kwezimo zokugoba nokuvula okuphindaphindiwe. Lesi sihloko sichaza ukuthi ungakuvimbela kanjani lokhu ngokukhetha okufanele kwe-substrate (i-fiber yengilazi iqiniswe), ukujiya okuphezulu (0.18mm njengokujwayelekile), ukukhetha kwe-adhesive ye-silicone, nezindlela zokufaka ezifanele.

Ukukhethwa kwephepha lokukhishwa noma i-substrate yefilimu kanye ne-ejenti yokukhulula kuthinta ngokuqondile ukuqina kwesitoreji nokusebenza kokuxebuka kwetheyiphu ye-PTFE yokushisa okuphezulu. Lesi sihloko siqhathanisa i-PET vs. kraft paper substrates kanye ne-silicone ngokumelene nama-ejenti okukhululwa e-fluorinated, incoma inhlanganisela efanele yokuxebuka kwezinsalela eziyiziro nokuthembeka kwesikhathi eside.

Amateyipu e-PTFE okushisa okuphezulu asetshenziswa kakhulu ekufakeni ugesi, kodwa izimo ze-high-frequency kanye ne-high-voltage zibeka izingozi eziyingqayizivele: ukuphuka kukagesi, ukukhipha ingxenye, ukuguga okushisayo, ukulahlekelwa kwesignali ye-high-frequency, kanye nokuzwela kwemvelo. Lesi sihloko sichaza ingozi ngayinye nendlela yokugwema.