Ukucoca nokugcinwa ngokufanelekileyo kwandisa ubomi belaphu le-PTFE lobushushu obuphezulu. Coca emva kokusetyenziswa nasemva kokupholisa. Sebenzisa iibhrashi ezithambileyo, izicoci ezingathathi hlangothi, okanye utywala ukwenza amabala. Ungaze usebenzise iiasidi ezomeleleyo/iialkali, iblitshi, okanye izikrweqe zentsimbi. Ukuthambisa ioli ye-silicone rhoqo kunciphisa ukunxiba. Landela ezi zikhokelo ukuthintela ukonakaliswa kwengubo.

Iteyiphu yobushushu obuphezulu be-PTFE inokuxhathisa kakubi kwimitha ye-ionizing. Kwi-1 kGy nje ekutyhilekeni kwe-gamma, amandla e-tensile ehla ukuya kuthi ga kwi- ~25% yoqobo. Ifanelekile kuphela kwiindawo eziphantsi kwedosi (ukutya / inzalo yonyango <10 kGy). Kwishishini lenyukliya okanye iziphekepheke, sebenzisa i-polyimide okanye i-PEEK endaweni yoko.

Ukuvavanya umgangatho we-emulsion we-PTFE ubandakanya izibonakaliso ezintandathu eziphambili: umxholo oqinileyo (60±2% nge-T / FSI 067-2021), i-pH (9.0-11.0), ukusabalalisa ubungakanani besuntswana (i-laser diffraction/DLS), i-viscosity (12-30 mPa·s kwi-25 ° C), ukuzinza (i-centrifugal kunye nokubonakala kwe-thaw, i-freeze-thaw). Esi sikhokelo sibandakanya iindlela zovavanyo eziqhelekileyo kwipharamitha nganye.

Kwiiteyiphu zobushushu obuphezulu be-PTFE phantsi kokuntywiliselwa kwexesha elide, i-substrate ye-PTFE ihlala inert yekhemikhali, kodwa i-adhesive layer iyindawo ebuthathaka. Amanzi buthathaka abicah PSA; Amanzi anetyuwa anyusa isantya umhlwa. Kwiikhemikhali ezinobundlobongela, i-fluorosilicone okanye i-perfluoropolyether adhesives - okanye iteyiphu ye-PTFE engena-adhesive-iyadingeka. I-peel ilahleko yamandla ukuya kwi-40% emva kweeyure ezingama-48 emanzini.

Iteyiphu yobushushu obuphezulu be-PTFE esetyenziswa kwizicelo zoqhagamshelwano lokutya kufuneka ihlale ngaphakathi kwemida yobushushu echaziweyo: ≤260°C ukuze isetyenziswe ngokuqhubekayo, ≤300°C kwiincopho ezimfutshane (imizuzu), kwaye ingaze ibe ngaphezu kwe-327°C (ukubola). I-FDA kunye ne-EU imigaqo ayicacisi umda wexesha jikelele - ubude boqhagamshelwano obukhuselekileyo buxhomekeke kwiqondo lokushisa kwaye kufuneka luqinisekiswe ngovavanyo lokufuduka olufanisa iimeko zangempela.

Ilaphu le-PTFE elinobushushu obuphezulu kunye nelaphu le-silicone zombini zisebenzisa ilaphu le-fiberglass njengesiseko kodwa ziyahluka kwizinto zokwaleka (i-PTFE resin vs irabha ye-silicone). I-PTFE igqwesile ekungabambeni, ukuxhathisa ukunxiba, kunye nokumelana neekhemikhali ukuya kuthi ga kwi-260°C. Ilaphu le-Silicone linika ukuguquguquka okuphezulu, ukugquma kombane, kunye nokumelana nomlilo (ukuya kuma-230 ° C). Khetha ngokusekelwe kukubaluleka kwakho.

Ilaphu le-PTFE lobushushu obuphezulu (i-PTFE inwebu yempahla) lukhetho lweprimiyamu yolwakhiwo oluqinileyo. Izinto eziluncedo ezingundoqo: iminyaka engama-30+ yobomi bangaphandle, indawo yokuzicoca (amanzi emvula ahlamba ubumdaka), ukuhanjiswa kokukhanya okuthambileyo (6-13%), ukukala komlilo kuDidi A, kunye namandla afana nentsimbi angaphantsi kwe-1.5 kg/m². Isetyenziswa kumabala emidlalo, kwizikhululo zeenqwelo moya, kunye nezakhiwo ezinomfanekiso kwihlabathi liphela.

Iteyiphu ye-PTFE yobushushu obuphezulu ifuna ukugcinwa okufanelekileyo ukugcina ukunamathela kwayo, ukuguquguquka, kunye nokukhulula ukusebenza. Iimfuno eziphambili zibandakanya ukulawulwa kweqondo lokushisa (10-30 ° C), umswakama ongaphantsi kwe-60%, ukuphepha ukukhanya, ukuhlukaniswa kweekhemikhali, ukubekwa ngokuthe nkqo, kunye nomoya. Landela ulawulo lwe-inventri ye-FIFO kwaye uhlole rhoqo.

Ukukhetha iteyiphu echanekileyo ye-PTFE yobushushu obuphezulu kwibhedi eshushu yomshicileli we-3D ifuna ukugxila kwizalathisi ezine eziphambili: ukumelana nobushushu (ukuya kuthi ga kwi-260 ° C +), i-fiberglass-reinforced substrate (0.18mm efanelekileyo), i-adhesive backing ye-silicone kunye nomphezulu ongeyena intonga, kunye nobubanzi obufanelekileyo / ukunyamezela. Esi sikhokelo sikunceda ukuba uphephe ukulwa, intsalela, kunye nokusilela koshicilelo.

Ubushushu beglasi yokutshintsha (Tg) ye-silicone yokuncamathelisa i-adhesive yoxinzelelo ijikeleze -120 ° C - isezantsi kakhulu kune-adhesives ye-acrylic. Le Tg ye-ultra-low igcina i-PTFE i-tape ephezulu yobushushu eguquguqukayo kwaye inamathele nakwi--70 ° C, ikhusela ukuqhekeka kwe-brittle kunye nokuvumela ukubambelela okuthembekileyo kwizicelo ze-cryogenic.