I-PTFE (ipolytetrafluoroethylene)kunye ne-polyester (efana ne-PET, i-PBT, njl.) zizinto ezimbini ezihluke ngokupheleleyo ze-polymer. Zinokwahlukana okuphawulekayo kwisakhiwo samakhemikhali, iimpawu zokusebenza kunye neendawo zokusetyenziswa. Olu lulandelayo luthelekiso oluneenkcukacha:
1. Ubume beMichiza kunye nokwakheka
I-PTFE (ipolytetrafluoroethylene)
●Ulwakhiwo: lwenziwe ngetsheyini yecarbon athom kunye neathom yefluorine ezaliswe ngokupheleleyo (-CF₂-CF₂-), kwaye i-fluoropolymer.
●Iimpawu: Ibhondi ye-carbon-fluorine eyomeleleyo inika ukunganyaniseki kweekhemikhali okuphezulu kakhulu kunye nokumelana nemozulu.
Ipolyester
●Isakhiwo: Ikhonkco eliphambili liqulethe iqela le-ester (-COO-), njenge-PET (i-polyethylene terephthalate) kunye ne-PBT (i-polybutylene terephthalate).
●Iimpawu: Ibhondi ye-ester inika amandla afanelekileyo omatshini kunye nokuqhubekeka, kodwa ukuzinza kwayo kweekhemikhali kuphantsi kunoko kwe-PTFE.
2. Ukuthelekisa ukusebenza
| Iimpawu | PTFE | Ipolyester (efana ne-PET) |
| Ukumelana nobushushu | - Ubushushu bokusetyenziswa rhoqo: -200°C ukuya kuma-260°C | -I-PET: -40°C ukuya kuma-70°C (ixesha elide) |
| Uzinzo lwekhemikhali | Ukumelana phantse nazo zonke iiasidi, iialkali kunye nezinyibilikisi ("inkosi yeplastiki"). | Ukumelana nee-acids ezibuthathaka kunye ne-alkali, ngokulula ukugqwala ngama-acids anamandla kunye ne-alkalis |
| I-coefficient yefriction | Iphantsi kakhulu (0.04, ukuzithambisa) | Ephakamileyo (idinga izongezo ukuphucula) |
| Amandla omatshini | Phantsi, kulula ukukhasa | Ephakamileyo (i-PET isoloko isetyenziswa kwiifiber kunye neebhotile) |
| Iimpawu zeDielectric | Igqwesileyo (izixhobo zokugquma eziphakamileyo) | Ilungile (kodwa inobuntununtunu) |
| Ukuqhubekekisa ubunzima | Kunzima ukunyibilika kwenkqubo (ifuna i-sintering) | Inokutofwa kwaye ikhutshwe (kulula ukuyiqhuba) |
Iinkalo zesicelo
I-PTFE: isetyenziswa ngokubanzi kwi-aerospace, izixhobo ze-elektroniki, imboni yeekhemikhali, ukulungiswa kokutya, unyango kunye nezinye iindawo, zihlala zisetyenziselwa ukwenza izitywina, iibheringi, iingubo, izinto zokugquma, njl.
I-polyester: isetyenziswa ikakhulu kwimicu yelaphu, iibhotile zeplastiki, iifilimu, iiplastiki zobunjineli kunye namanye amacandelo
Iingcamango Eziphosakeleyo eziqhelekileyo
I-non-stick coating: I-PTFE (iTeflon) isetyenziswa ngokuqhelekileyo kwiipani ezingezizo, ngelixa i-polyester ayikwazi ukumelana nokupheka kobushushu obuphezulu.
I-Fiber field: Iifiber ze-polyester (ezifana ne-polyester) zizona zixhobo eziphambili zempahla, kunyeIintsinga ze-PTFEzisetyenziselwa kuphela iinjongo ezizodwa (ezifana nempahla ekhuselayo yekhemikhali)
Isetyenziswa njani i-PTFE kushishino lokutya?
I-PTFE (i-polytetrafluoroethylene) inoluhlu olubanzi lwezicelo kwishishini lokutya, ngokuyininzi ngenxa yokuzinza kwayo kweekhemikhali, ukumelana nobushushu obuphezulu, ukungabambeleli kunye ne-coefficient ephantsi ye-friction. Ezi zilandelayo zezona zicelo ziphambili ze-PTFE kushishino lokutya:
1. Ukugquma izixhobo zokulungisa ukutya
I-PTFE yokwambathisa isetyenziswa kakhulu kwi-lining kunye nonyango lomphezulu wezixhobo zokulungisa ukutya. Ukungabambeki kwayo kunokuthintela ukutya ekubambeleleni kumphezulu wezixhobo ngexesha lokucubungula, ngokwenza lula inkqubo yokucoca kunye nokuphucula ukusebenza kakuhle kwemveliso. Umzekelo, kwizixhobo ezifana nee-oveni, ii-steamers, kunye ne-blenders, i-PTFE yokwambathisa inokuqinisekisa ukuba ukutya akubambeleli ngexesha lokulungiswa kobushushu obuphezulu ngelixa kugcinwa ingqibelelo kunye nomgangatho wokutya.
2. Iibhanti zokuhambisa kunye neebhanti zokuhambisa
Amabhanti okuhambisa agqunywe nge-PTFE kunye namabhanti okuhambisa adla ngokusetyenziswa xa kusenziwa ukutya okwenziwa ngobuninzi, njengokupheka nokuhambisa amaqanda, i-bacon, iisoseji, inkukhu, neehambhega. I-coefficient ephantsi ye-friction kunye nokumelana nokushisa okuphezulu kwesi sixhobo kwenza ukuba isebenze ngokuzinzileyo kwiindawo eziphezulu zokushisa ngaphandle kokubangela ukungcoliswa kokutya.
3. Imibhobho yodidi lokutya
Imibhobho ye-PTFE isetyenziswa kakhulu ukuthutha ukutya neziselo, kuquka iwayini, ibhiya, iimveliso zobisi, iisyrups kunye nezinongo. I-inertness yayo yeekhemikhali iqinisekisa ukuba ayichaphazeli umgangatho weemveliso ezigqithisiweyo kwiqondo lokushisa -60°C ukuya kuma-260°C, kwaye awazisi nawuphi na umbala, incasa okanye ivumba. Ukongeza, imibhobho ye-PTFE ihlangabezana nemigangatho ye-FDA yokuqinisekisa ukhuseleko lokutya.
4. Izitywina kunye neegaskets
Iitywina ze-PTFE kunye neegaskets zisetyenziswa kuqhagamshelo lwemibhobho, iivalvu kunye neepaddles ezixhokonxayo zezixhobo zokulungisa ukutya. Bangakwazi ukuxhathisa i-corrosion kwiindidi ezahlukeneyo zeekhemikhali ngelixa bezinzile kwiindawo zokushisa eziphezulu. La matywina anokuthintela ngokufanelekileyo ukutya ekungcoleni ngexesha lokucubungula ngelixa ukwenza lula ukucocwa kunye nokugcinwa kwezixhobo.
5. Izinto zokupakisha ukutya
I-PTFE iphinda isetyenziswe kwizinto zokupakisha ukutya, ezifana neengubo zepani ezingezizo, i-baking paper coatings, njl. Ezi zinto ziqinisekisa ukuba ukutya akuhambelani ngexesha lokupakisha kunye nokupheka, ngelixa ugcina ucoceko kunye nokhuseleko lokutya.
6. Ezinye izicelo
I-PTFE inokusetyenziswa kwiigiya, ukuthwala i-bushings kunye neenxalenye zeplastiki zobunjineli ekusetyenzweni kokutya, ezinokuthi ziphucule ukuxhathisa ukunxiba kunye nokumelana nokubola kwezixhobo ngelixa kuncitshiswa iindleko zokugcinwa.
Iingqwalasela zokhuseleko
Nangona i-PTFE ineempawu ezininzi ezibalaseleyo, kusafuneka unikele ingqalelo kukhuseleko lwayo xa uyisebenzisa kushishino lokutya. I-PTFE inokukhulula umkhondo weegesi ezinobungozi kumaqondo obushushu aphezulu, ngoko ke kuyimfuneko ukulawula ubushushu bokusetyenziswa kwaye uthintele ubushushu bobushushu obuphezulu bexesha elide. Ukongeza, kubalulekile ukukhetha izixhobo ze-PTFE ezihlangabezana neemfuno ezifanelekileyo zolawulo.
Ixesha lokuposa: Mar-26-2025