Izindaba

Phakathi kwamapulasitiki obunjiniyela, into eyodwa igqama ngenxa yokumelana kwayo okungaphezulu kokugqokwa, ukumelana nomthelela, kanye nezakhiwo zokuzigcoba, okuyenza ibe ngesinye sezixazululo zokugcina izimo zokusebenza ezinzima. I-polyethylene enesisindo esikhulu samangqamuzana (UHMWPE) iye yaguqulwa yaba ifomu leshidi, yandisa ububanzi bokusebenza kwayo yafinyelela emazingeni angakaze abonwe, idlala indima engenakuthathelwa indawo kukho konke kusukela kumasistimu okudlulisela embonini asindayo kuya emigqeni yokucubungula ukudla.

I. Ukuqonda i-UHMWPE: Iyini i-"Ultra-High Molecular Weight"?

I-UHMWPE akuyona i-polyethylene evamile. Umnyombo wayo ulele “esisindweni sayo samangqamuzana aphezulu kakhulu”—amaketanga awo amangqamuzana amade ngokuphindwe izikhathi eziyishumi kunalawo e-polyethylene evamileI-HDPE), ngokuvamile edlula izigidi ezingu-1.5. La maketango amangqamuzana abambene, akhe ukwakheka kwamangqamuzana aqine kakhulu okwenza le nto ibe izici zayo ezibonakalayo eziphawulekayo.

Ishidi le-UHMWPE lenziwe kusukela kulokhu okubalulekile ngokusebenzisa i-sintering, pressing, noma extrusion process. Ubukhulu bayo busukela kumamilimitha ambalwa kuye kwamakhulu amamilimitha, buhlangabezana nezidingo zezinhlelo zokusebenza ezahlukahlukene.

II. Izakhiwo Ezinhlanu Ezivelele zeUHMWPE Ishidi

1. Ukumelana Nokugqokwa Kakhulu: Lesi yisici esiphawuleka kakhulu se-UHMWPE. Ukumelana kwayo nokugqoka kuphakeme nakakhulu kunezinsimbi eziningi (njenge-carbon steel nensimbi engagqwali), izikhathi ezingu-4-5 kunenayiloni (PA), kanye nezikhathi ezi-3 kune-polyoxymethylene (POM). Ezindaweni ezigqokwayo, "iyinkosi yepulasitiki."

2. Ukumelana Nomthelela Ophakeme Kakhulu: Ngisho emazingeni okushisa aphansi (-40°C noma ngaphansi ngisho nangaphansi), amandla ayo okushayisana ahlala ephakeme kakhulu, amunca ngempumelelo ukudlidliza nokushaqeka ngaphandle kokuphuka noma ukuphihlika kalula.

3. Izinto Ezinhle Kakhulu Ezizigcoba Ngayo Nezingezona Izinduku: I-coefficient yayo yokungqubuzana iphansi kakhulu, ifana neyamanzi, futhi ibonisa izinto ezingezona izinduku. Lokhu kunciphisa ukumelana lapho izinto ezisetshenziswayo zishibilika endaweni yayo, kuvimbela ukunamathela futhi kunciphisa kakhulu ukuguga kwemishini nezinto zokwakha.

4. Ukumelana Namakhemikhali: Ibonisa ukumelana nokugqwala okuhle kakhulu kweningi le-asidi, i-alkali, nezixazululo zikasawoti, okuyenza ifanelekele ukusetshenziswa ezindaweni ezigqwalile ezifana nokucutshungulwa kwamakhemikhali.

6. Ukuhlanzeka nokungenabo ubuthi: Ihambisana nesitifiketi se-US FDA kanye ne-USDA, ingathintana ngokuqondile nokudla nemithi, futhi isetshenziswa kakhulu ekucubunguleni ukudla nezimboni zezokwelapha. Ngesikhathi esifanayo, imunca amanzi aphansi kakhulu futhi akulula ukuzalanisa amagciwane.

IV. Kungani KhethaUHMWPE Ishidi? - Ukuqhathanisa ne-Metal kanye Nenye Ipulasitiki Yobunjiniyela

1. Uma kuqhathaniswa Nensimbi (isb., Insimbi Yekhabhoni, Insimbi Engagqwali):

I-Wear-Resistant Kakhudlwana: Ubude bayo bempilo budlula kude okwensimbi ngaphansi kwezimo zokugqoka ezihugayo.
Ilula: Ukuminyana kwayo kungu-0.93-0.94 g/cm³ kuphela, 1/7 okwensimbi, okwenza kube lula ukuyifaka nokuthutha.

Ayinamsindo: Isebenza ngokuthula, iqeda umsindo onzima wokungqubuzana kwensimbi.

I-Corrosion-Resistant: Ayizwani nokugqwala futhi imelana namakhemikhali.

2. Uma kuqhathaniswa Nenye Ipulasitiki Yobunjiniyela (isb., Inayiloni, iPolyoxymethylene):

I-Wear-Resistant Kakhudlwana: Ukumelana kwayo nokugqokwa kukhulu ngokuphindwe izikhathi ezimbalwa.

I-Lower Friction: Izakhiwo zayo zokuzithambisa ziphakeme.

I-Impact-Resistant Kakhudlwana: Izinzuzo zayo zivezwa ikakhulukazi emazingeni okushisa aphansi.

Ishidi le-UHMWPEingumdondoshiya onamandla buthule emkhakheni wesimanje wezinto zezimboni. Nakuba ingeqinile njengensimbi, ukumelana kwayo nokugqokwa okungenakuqhathaniswa nokusebenza okuphelele kuyenza ibe umdlali ongashintsheki ekulweni nokuguga, ekwehliseni ukusetshenziswa kwamandla, nasekuthuthukiseni ukusebenza kahle. Kusukela ezimayini kuye emakhishini, kusukela ezimbonini kuya ezinkundleni zemidlalo, ukuqina kwaleli shidi le-"super plastic" livikela ukusebenza kwesikhathi eside kwamadivayisi angenakubalwa, okulenza libe "umnakekeli ongagugi" kanye "nomvikeli ogelezayo" emkhakheni wezimboni.