Yini indlela yokukhetha izinkampani eziphakeme ukusebenza kwezinkampani zokuhlanza PU ezihlanzwa?

Ukukhethwa kwezinto ezifanele amaphutha wesibayi for PU elastomer olwalubunjiwe iMIKHIQIZO limelela iphuzu lesinqumo elibalulekile ezinkambisweni zokukhiqiza zanamuhla. Ama-elastomer e-polyurethane afakwa anikeza izakhiwo ezihlukile zemishini nokumelana namakhemikhali, okwenza kube yinto edingekayo kuzo zonke izinhlelo zokusebenza zezimoto, zezimboni nezomthengi. Nokho, ukufeza ukusebenza okuhambisanayo kokukhipha ukwakheka ngenkathi kugcinwa ikhwalithi yendawo kudinga ukucatshangelwa ngokucophelela kwamakhemikhali e-release agent, izindlela zokusebenzisa, kanye nezici zokuhambisana ezinomthelela oqondile ekusebenzeni kahle kokukhiqiza kanye nezici zomkhiqizo wokugcina.

Ukuqonda Izinselele Zokukhululwa Kwe-Elastomer Ye-Polyurethane

Izindlela Zokuxhuma Kwamakhemikhali Ezimisweni Ze-PU

Ama-elastomer e-polyurethane abonisa izakhiwo ezinamandla zokunamathisela ngenxa yokuxhuma kwawo kwe-polar urethane kanye namakhono okuhlangana kwe-hydrogen. Phakathi nenqubo yokuqina, lezi zinto zivame ukuthintana eduze nezindawo ezisesikhunjeni, zakha amandla okunamathela angenza kube nzima ukuhlanza isikhunta. Isakhiwo samangqamuzana e-PU elastomers sihlanganisa izingxenye eziqinile nezithambile, kanti izingxenye eziqinile zinomthelela ekuqineni kokuqina ngokusebenzisa amandla ka-van der Waals kanye nokusebenzisana okungenzeka kwamakhemikhali nezindawo ezisemhlabeni zensimbi.

Ukushintsha kwamazinga okushisa phakathi nomjikelezo wokusakaza nokuqina kwenza inqubo yokuqeda ukwakheka ibe nzima nakakhulu. Njengoba ama-elastomers e-PU epholile ekushiseni kokulungiswa, ukuncishiswa kokushisa kungakhuphula ingcindezi yokuxhumana phakathi kwengxenye nendawo yesikhunta. Lesi simo sidinga ukusetshenziswa kwama-agent akhethekile okukhulula izinhlelo zokusebenza ze-PU elastomer ezingagcina ukusebenza ngaphansi kwezimo eziguquguqukayo zokushisa ngenkathi zinikeza izakhiwo zokuxubha ezihambisanayo.

Izinkinga Zokusebenza Kwesifazwe

Ukuphakanyiswa kwesifazwe phakathi kwezinkulungwane zepolyurethane nezinkulungwane zomkhombi kuyasebenza njengendlela esiphambili ekubeni kubhekana nokugqamisa. Izinkulungwane eziningi esifazweni, ikakhulu lezi ziyisilimela noma izistili, ziyabizwa ukuthi zibiza okukhulu nokugqamisa nezinkulungwane zepolyurethane. Izinkulungwane zokuvuleka zisebenza ngokuthi zenza isifazwe esincane sokuvuleka sokugqamisa, okusindisa umsebenzi wokuvuleka kahle womphakathi ngaphandle kokwenza izinkinga zomphakathi noma ukuvula umkhombi.

Ukuziqonda izivale zokuphakanyiswa kwesifazwe esikhundleni somphakathi nesikhundleni somkhombi kusiza ukukhetha izinkulungwane zokuvuleka eziphelele kumsebenzi wokuvuleka kwezinkulungwane zepolyurethane. Izinkulungwane ezintsha zokuvuleka zihlanganisa izinhlayisi zezinye izinhlayisi zokuvuleka ezithandekayo ukuthi zihlange isifazwe sokugqamisa ngaphandle kokuthi zihlange ukuthi zihlangane nezinhlayisi zepolyurethane ngaphakathi kwesikhathi sokufika kwesikhundleni.

Izithotho Zokuvuleka

Izinqumo Ze-Silicone

Ama-release agents asuselwa ku-silicone amelela ubuchwepheshe obusetshenziswa kakhulu ekusetshenzisweni kwe-PU elastomer ngenxa yokuqina kwabo okushisayo okuhlukile kanye nezici zamandla aphansi. Lezi zinhlobo ngokuvamile zisebenzisa ama-polydimethylsiloxane (PDMS) backbones anezinguquko ezahlukahlukene zokusebenza ukuthuthukisa ukusebenza. Ukuqina okuphansi okuvelayo kwezinto ze-silicone kudala isithiyo esiphumelelayo phakathi kwe-elastomer yokuqina nendawo yesikhunta, okwenza kube lula ukusebenza okuhlanzekile kokukhipha isikhunta.

Ama-agent athuthukile okukhulula i-silicone ekusetshenzisweni kwe-PU elastomer afaka ukusebenza okuphendulayo okwenza kube nokunamathiselwe okulinganiselwe ngesikhathi sokufakwa. Le ndlela yokuxhumanisa isiza ekwakheni amafilimu aqinile angamelana nemijikelezo eminingi yokwakha ngaphandle kokuwohloka okukhulu. Nokho, kufanele kucatshangelwe ngokucophelela izinkinga ezingase zibe khona zokungcola kwe-silicone, ikakhulukazi lapho kudingeka khona imisebenzi yokudweba noma yokuhlanganisa.

Ubuchwepheshe Bokukhululwa Kwe-Fluoropolymer

Ama-fluoropolymer-based release agents anikeza ukumelana namakhemikhali okuphezulu kanye nezici zamandla aphansi kakhulu aphansi okwenza kube ngempumelelo ikakhulukazi ekubumbeni okunzima kwe-PU elastomer. Lezi zinhlelo ngokuvamile zisebenzisa amakhemikhali agcwele i-fluoride noma agcwele i-fluoride kancane, akha indawo engamatheki ngenxa yesakhiwo sawo esiyingqayizivele samangqamuzana. Izibopho ze-carbon-fluorine kulezi zinto zinikeza ukuzinza okuhlukile ekuhlaselweni amakhemikhali nasekonakaleni ngokushisa.

Ukusetshenziswa kwama-fluoropolymer release agents ekubumbeni i-PU elastomer kudinga amasu akhethekile ngenxa yezici zawo eziyingqayizivele zokumanzisa. Lezi zinto ngokuvamile zidinga amazinga okushisa aphezulu okusetshenziswa noma izixazululo ezithile zokuthwala ukuze kufinyelelwe ekuhlanganisweni okufanayo. Nakuba ekuqaleni zibiza kakhulu kunezinye izindlela, ngokuvamile izinhlelo ze-fluoropolymer zinikeza ukuphila isikhathi eside nokusebenza okuphakeme ekusetshenzisweni okuyinselele.

Imithambo Yokusebenzisa Nokuhlelwa

Imithambo Yokusukuma

Ukusukuma kuyizindlela eziningi kakhulu yokufaka amasimbi okuvuleka kumasebenti we-PU elastomer ngoba iyisifundo esihle futhi isinikeza ukufakwa kwezilinganiso zonke zomkhumbu. Ukusukuma kahle kudinga ukubona izinto eziningi njengekhetho yemphini, uphinde lwesukuma, ukuphindeka kwesukuma, nokufakwa kwezilinganiso ukuze kuvunyelwe ukusebenza kahle. Amasistimu wesukuma awasetshenziswa ngokuzenzakalelayo asinikeza ukubuyiselwa kahle futhi asindiza ukunciphisa izindleko zomsebenzi futhi asindiza ukuvikela indawo yokusebenza.

Ukukhetha amasolvanti amangalisi okuphathwa kubhekisele kakhulu ekusebenzeni kwespraye nokusebenza kokugcina okugcwele. Amasistimu esizinda asetshenziswa ngokwesizinda asinika iziphumo zokuhlela kwezinsiza nezinkinga zokuhlupha kwezinkambo, ngakho-ke amasistimu esolventi anganika ukusebenza okuhle kwezinkambo zokuhlupha ezithile. Ukudibanisa isikhathi sokusebenzisa ispraye kusiza ekuthinteni ukuphatha kwezolventi nokufomela kwezifilmi ukuze kufikelele ukusebenza okuhle kokugcina.

Amadoda Okubhusha Neokubhala Ngokuzimela

Amadoda okusebenzisa amabhusha noma amakhlothi okubhala ngokuzimela asinika umkhawulo wokuphatha okuhle kwezicelo zokugcina, futhi kuyisibonelo esihle kakhulu kuma-mold engaphansi kwezinhlobo eziningi noma kuma-zicelo zokugcina okuphakeme. Lezi zindlela zisiza abasebenzi ukuguqula ubude bakwesicelo ngokwesibonelo sezinhlobo zama-mold noma ngokwesibonelo sesikhathi esidlule. Ukubhusha kwezicelo zokugcina kuma-sistimu we-PU elastomer kufuna ukuzinikela kakhulu ukuphatha kwezicelo zokugcina ukuze kungavunyelwe ukusebenza okungafanele kokugcina.

Ukukhetha izinkampani zokusebenzisa eziphathelene ngenkathi yokuqala kubalulekile kakhulu ekuthinteni imiphumela yokuqala yokusebenza. Amabrikishi esihlangu sesihlangu senyama singasiza ngokuphelele kakhulu ekuboniseni kwezinhlobo zezinkampani zokuhlela, ngakho-ke amadolozi amashushu asiza kakhulu ekuboniseni kwezinhlobo zezinkampani zokuhlela nokubona kwezinhlobo zezinkampani zokuhlela. Amaphutha we-microfiber angafika emaphutheni amancane kakhulu neyodwa uma abhekiswe kahle, kodwa kufuneka abhekiswe kahle ngokuphakeme noma abuyiselwe ukuze bakhangele isebenziso sabo.

Ukucinga Kwemiphumela Nobuchwepheshe Bokukhetha

Ukulinganisa I-Release Force

Ukulinganisa ngokuvamile ukusebenza kwe-release kufuna izimboni zokuzivikela ezilungile ekulinganiseni i-force efunekayo ukusulula iziqephu zesifunda esizwe ku-surface yomkhumbi owenziwe ngokuhlela. Lezi zilinganiso zinakha izidata zokulinganisa ngokuvamile izinkampani zokuhlela ezahlukene kwezinhlobo zezinkampani zokuhlela zesiPU elastomer futhi zinakha ukuzivikela iziparamitha zokusebenzisa. Izindlela zokuzivikela zizoba ngokuthatha izinqumo zokuphanda noma zokuphanda ngokuphakeme ngokusebenzisa izinkampani zokulinganisa i-force ezilungile.

Ukuhlanganisa phakathi kwezindawo zokuvuleka nezindlela zokugcina isikhumba, ubude bekufakwa, nokuthi kuzokwenzeka njani ukugcina kufanele kuchazwe ngokuphelele ukuze kwenziwe iziphumo ezinamandla. Izinkambu zomhlaba ezithile njenge-temperature ne-humidity ngalokhu kuzokwenzeka kuzokubonakala kakhulu emiphumelweni, futhi kufanele kwenziwe ukuzokwenzeka ngokuphelele ukuze kutholakale iziphumo ezinamandla zokulinganisa. Ukuzokwenzeka kwezinsuku eziningi kusiza ekuboneni ukungafani kwezinhlelo zokusebenza ngemikhumbu eminingi yezinhlelo zokugcina.

Ukucinga Kwesikhumba

Ukucinga ngokubona ne-ngokukhanda kwesikhumba seziphakade zokugcina kusiza kubona iziphumo zokuvuleka kanye nezinkinga ezingaphansi kwezinhlelo zokugcina noma kwezinhlelo zokugcina zokugcina. Izinkinga zokugcina njenge-skin texture esibonakalayo njenge-orange peel, izimboni zokugcina, noma iziqhelo zokugcina zikubonisa ukuthi ukuvuleka akuyiyo kahle noma kukhona izinkinga zokuhlanganisa. Izindlela zokuchaza eziningi njenge-surface profilometry zingasiza ekuboneni ubude bokugcina ngokuphelele ukuze kutholakale ukucinga okuphelele.

Umthelela wama-agent ahlukene okukhulula wokusebenza kwe-PU elastomer emisebenzini yokwakha elandelayo kufanele uhlolwe ngokucophelela. Ukungcola komhlaba okubangelwa yizinto ezikhishwayo kungaphazamisa imisebenzi yokudweba, yokunyathelisa noma yokuhlanganisa, okungase kudinge izinyathelo ezengeziwe zokuhlanza ezandisa izindleko zokukhiqiza. Ukuhlolwa kokuhambisana nezinqubo ezisezansi kufanele kwenziwe ngesikhathi sesigaba sokukhetha ukuze kugwenywe izinkinga zokukhiqiza ezibizayo.

Iinkcukacha Nezinye Izinsiza

Ukukhishwa kwama-VOC Nokuthobela Umthetho

Imisebenzi yokukhiqiza yanamuhla ibhekene nemithetho eqinile ngokuqondene nokukhishwa kwezinto eziphilayo eziguquguqukayo ezivela ezinkambisweni zezimboni. Ukukhethwa kwama-release agents ezisetshenziswa kuma-elastomer e-PU kufanele kubhekwe kokubili izidingo zamanje nezalindelekile zokulawula ukuqinisekisa ukuhambisana kwesikhathi eside. Amafomu asekelwe emanzini ngokuvamile anikeza izinzuzo ezinkulu ekunciphiseni ama-VOC uma eqhathaniswa nezinhlelo ezijwayelekile ezisekelwe ku-solvent.

Imilimiti yokubhukuda kwezindawo zokusebenza kwamaphakathi amaningi wezinkemikali kwezifomula zokulibala kufuneka zihlalwe ngokuchanekile uma kuselwa iprodukthi. Amaphuzu okusebenzisa imithombo yezinto ephambili (MSDS) ayabika umlando omuhle wokuvumela ukwenza izindlela zokusebenzisa ngokuphelele nokwakha izinto zokulinda umuntu. Ukudesigna kwezinhlobo zokuvula ngokuphelele kusiza ekunciphiseni ukubhukuda kwabantu besebenzi ngalokho kuthintana nokugcina izimo zokusebenzisa ngokuphelele ukuze kutholakale ukulibala ngokuphelele.

Izindlela Zokuncipha Umfula

Izindlela zokusebenzisa ngokuphelele neukwahluka kwezinto zokusebenzisa kungasiza kunciphisa ukugenera kwezinto ezisindisiweyo nokuthabatha izindleko zokuthabatha kwezinto ezisindisiweyo kwezindlela zokwenza i-PU elastomer. Izisistimu zokushaya ngokuphelele zokuphakama nokunciphisa ukushaya kwezinye izinto zisiza ekunciphiseni ukusebenzisa kwezinto ngalokho kuthintana nokugcina ubukhulu bekufakwa. Ukuthuthukisa kwezifomu zokulibala ezinamandla kakhulu kunciphisa ukufakwa kabusha, futhi kunciphisa ukusebenzisa kwezinto ngokuphelele nokugenera kwezinto ezisindisiweyo.

Kufanele kubhekwe imithombo yokubuyisela kusebenza nokubuyisela amasangwana okukhishwa nokubuyisela izinkampani zokusebenzisa amasangwana njengephuzu lokuphatha izinto ezingavumelekileyo. Ezi amasangwana okukhishwa kwe-PU elastomer amafomula ayinikeza izinqakamba ezinokubuyiselwa emhlabeni ezinokunciphisa ukungavumelekile kwezinsuku eziningi, kodwa kufanele kubhekwe ngokuchanekile ukuthi kunezinkinga zokusebenza phakathi kokukhetha.

Ukuvumela Imiphumela Yezinkinga Zokukhishwa

Imiphumela Yokugqibela Kwemiphumela Yokugqibela

Imiphumela yokugqibela ekhona kakhulu emisebenzini yokufaka i-PU elastomer kusho ukuthi kunezinkinga zokuhlanza isilawuli, izindlela ezingavumelekileyo zokusebenzisa amasangwana, noma izinkinga zokungafani kwamakhemikhali phakathi kwe-masangwana nokufaka i-elastomer. Izindlela zokuvumela imiphumela ziyahlanganisa ukususa izinto ezinye ngokuphelele futhi ukuzama izimo ezihlukene ukuze kubonwe ubunzima obuyindawo. Ukungafani kwezilawuli kusuka kwezimisebenzi zokufaka zempela kungabangela ukungavumelekile kwezinhlelo zokukhishwa, okunquma ukuthi kufanele kwenziwe izindlela zokucleanisa ngokuphelele.

Izinkinga zokunamathisela ezihlobene nokushisa zivame ukwenzeka lapho amazinga okushisa esikhunta edlula imikhawulo yokusimama kokushisa kwefilimu yokukhulula efakiwe. Izicelo ezisezingeni eliphakeme zingadinga ama-agent akhethekile okukhishwa okushisa aphezulu okucubungula i-PU elastomer agcina ukusebenza ngaphansi kwezimo ezishisayo ezimbi kakhulu. Izinguquko ohlelweni lokulungisa zingasiza futhi ekunciphiseni ukuthambekela kokuqina ngokuvumela ukujikeleza kokushisa okulawulwayo ngesikhathi senqubo yokususwa.

Ukwehlisa Amaphutha Ephezulu

Amaphutha angaphezulu ezingxenyeni ze-elastomer ezenziwe ngomumo angabangelwa yizinto ezahlukahlukene ezihlobene ne-agent yokukhulula kufaka phakathi ukusetshenziswa okungafani, ukungcola, noma ukusebenzisana kwamakhemikhali nohlelo lwe-PU. Ukwakheka kwe-orange peel ngokuvamile kubonisa izinkinga zokuhwamuka kwe-solvent noma izinhlelo zokuthwala ezingahambelani eziphazamisa ukwakheka kwefilimu efanele. Ukulungiswa okuhlelekile kwamapharamitha okufaka phakathi ibanga lokufafaza, ingcindezi, nezimo zemvelo ngokuvamile kungaxazulula lezi zinkinga.

Amasho okuhambisa noma ukubhisha kwezinto eziyisakhiwe kungabonisa ukuthi isikhombisa sokuhambisa sisebenziswe ngokuphelele noma kukhona izinkinga zokuhamba kwemithombo yekhemikali. Ukunciphisa ubude bakwesikhombisa ngaphandle kokuthi kubhekwe ukuthi kunezinkambo ezifanele kusobala lezi zinkinga. Kungadingeka ukusebenzisa izinhlelo ezinye ezenziwe ngokuguqula imithombo yekhemikali kumaqondiso apho izinkinga zokukhula kwezinye izinyathelo zokusebenza ziyisikhundla esikhulu, njengoko kufanele kwezinye iziqondiso zezibalo zomshini noma kwezinqumo zokusebenza kwezincwadi.

Imibuzo Evame Ukubuzwa

Kuzoba yini ukuthi isikhombisa sokuhambisa siyasebenziswa kabusha ngempela kumaqondiso?

Ukubuyisela indlela yokusebenzisa amasimbi okukhupha kwe-PU elastomer ayikho ngamaphuzu amaningi, kungakhathali ukuthi yiziphi izinhlobo zokufakwa, isitha sesitha, imiphumela yokugcina, nokuhlelwa kwesiqondiso. Amasimbi okukhupha okwesibili okunempilo kakhulu angakusinika ukusebenza kahle kuzo zinkulungwane ezingu-50–100 zokufaka, ngakho-ke amasimbi okufakwa ngokushaya okwesibili ayikho ngokuvamile ukuthi kufanele abuyiselwe ngokuvamile ngokuvamile ngamazinkulungwane ezingu-5–15. Ukujonga imiphumela yokukhupha nokubona ubuchule bocingo bakusiza ekubhalweni kwezinkulungwane zokubuyisela okulinganayo kwezimo zokuproducwa.

Ngakho-ke ngakwenzeka ukuthi amasimbi okukhupha amabili atholakala noma abhalwe ngokuthi abe ngamabili ukuthi akhange ukusebenza kahle?

Kwakungavunyelwe ngokujulile ukudlula izinkemikali ezahlukeneyo zokuhlela ukugcina ngoba kunezinkinga zokufanana nokubonakala kokusebenza okungafanele. Kepha, abasemthwala abaningi baphepha izisitemu ezingamabili noma amaningi ezokuthi zihlanganise imithwalo yezinkemikali zokuhlela ukugcina ngokulandela ukuze baphathe isibonelelo sokuphila kanye nokusebenza okuhle ngokuphelele. Ukudlula izinkemikali ezingafanani kungabangela ukungafanani kwamathuba okugcina, okubangela ukusukela kwesifunda futhi ukungafanani kwesibonelelo sokuhlela ukugcina ngokuphelele kwezindlela zokuprodukha.

Izilungiselelo zomshini wemold zingaphilisa njani nezinkemikali zokuhlela ukugcina zesiPU elastomer?

Ukubuyisela kahle kwesikhumba sokufaka kusenza umphumela omkhulu kwezinkulungwane zokuvulela kwezinkinga zezinkulungwane zokuqondisa i-PU. Izikhumba ezizimisele nezizimisele kakhulu zinakha umphumela omkhulu wezinkulungwane zokuvulela, nakuba izinkinga zokuphakanyiswa kwezikhumba ziyahamba ngokwesikhathi esithile sezinkulungwane zokuvulela. Ukucwashwa kwesikhumba ngokuchemikaleni ukususa izinto ezingaphansi zokusebenza kwaye emva koko ukwenza ukuthinteka kwezikhumba ngokuphelele kusiza ekuthengiseni izimo ezihle kwezinkulungwane zokuvulela ukubambisana nokusebenza kahle. Ezinye izinkinga zinakha umbuso wokufaka okuhle okunakha ukuthinteka kwezinkulungwane zokuvulela okuhle.

Izinkulungwane zokuvulela ziyathinta njani ubukhulu bokufaka kwezinkinga zezinkulungwane zokuqondisa i-PU?

Ukubhakisha kwezinkqubo zokuvumela kungahlela ukupheleka kwemibala yezinqubo zokufaka ngokupheleka, ikakhulu emaqhingweni aphatha izinkinga zokupheleka kwezinhlobo. Izinkqubo zokuvumela eziphakathi kwe-0.1 kunye ne-2.0 micrometers kuzo zizilinganiso ezinamandla kumaqhinga okupheleka kakhulu. Ukusebenzisa ngokupheleka izindlela zokubhakisha nokukhetha ngokupheleka izifomula ezincane zokubhakisha kusiza ukunciphisa izilinganiso zemibala. Kumaqhinga amakhulu, kufanele kwenziwe ukubonisa ukupheleka kwezinhlobo emva kokusetshenziswa kwezinkqubo zokuvumela ezintsha ukuze kuboneke ukuthi kuyasebenza ngokupheleka kwezilinganiso.