Iindaba

Phakathi kweeplastiki zobunjineli, enye into ibalasele ngokumelana kwayo nokuguguleka okuphezulu, ukumelana neempembelelo, kunye neempawu zokuzithambisa, nto leyo eyenza ukuba ibe yenye yezisombululo eziphambili kwiimeko zokusebenza ezinzima. I-polyethylene enobunzima obuphezulu kakhulu (Ultra-high molecular weight polyethylene)I-UHMWPE) iguqulwe yaba yifomu yephepha, yandisa uluhlu lwayo lokusetyenziswa ukuya kumanqanaba angazange abonwe ngaphambili, idlala indima engenakutshintshwa kuyo yonke into ukusuka kwiinkqubo zokuhambisa ukutya kumashishini amakhulu ukuya kwimigca yokucubungula ukutya.

I. Ukuqonda i-UHMWPE: Yintoni "Ubunzima beMolekyuli obuphezulu kakhulu"?

I-UHMWPE ayisiyo polyethylene eqhelekileyo. Umongo wayo usekwe "kubunzima bayo bemolekyuli obuphezulu kakhulu"—imixokelelwane yayo yemolekyuli ingaphezulu ngokuphindwe kalishumi kuneye polyethylene eqhelekileyo enoxinano oluphezulu (I-HDPE), idla ngokudlula i-1.5 yezigidi. Ezi ntambo zeemolekyuli zibotshelelwe, zenza isakhiwo semolekyuli esiqinileyo esinika izinto ezibonakala ngathi ziimpawu zazo zomzimba.

Iphepha le-UHMWPE lenziwe ngale nto ikhethekileyo ngokusebenzisa iinkqubo zokusila, zokucinezela, okanye zokukhuhla. Ubukhulu bayo buqala kwiimilimitha ezimbalwa ukuya kumakhulu eemilimitha, nto leyo ehlangabezana neemfuno zezicelo ezahlukeneyo.

II. Iimpawu Ezintlanu Ezibalaseleyo zeIphepha le-UHMWPE

1. Ukumelana nokuguguleka okugqithisileyo: Olu lolona phawu luphawulekayo lwe-UHMWPE. Ukumelana nokuguguleka kwayo kuphezulu kunezinye iintsimbi (ezifana nentsimbi yekhabhoni kunye nentsimbi engagqwaliyo), ngokuphindwe ka-4-5 kune-nylon (PA), kunye ngokuphindwe ka-3 kune-polyoxymethylene (POM). Kwiindawo zokuguguleka okurhabaxa, ngokwenene "yiKumkani yePlastiki."

2. Ukumelana neMpembelelo ephezulu kakhulu: Nokuba kumaqondo obushushu aphantsi (-40°C okanye nangaphantsi), amandla ayo okumelana ahlala ephezulu kakhulu, efunxa ngempumelelo ukungcangcazela kunye nokukhwankqiswa ngaphandle kokuqhekeka okanye ukuqhekeka lula.

3. Iimpawu Ezibalaseleyo Zokuzithambisa Nokunganamatheli: I-coefficient yayo yokungqubana iphantsi kakhulu, efana neyeyamanzi, kwaye ibonisa iimpawu ezinganamatheli. Oku kunciphisa ukumelana xa izinto zityibilika kumphezulu wazo, kuthintela ukunamathela kwaye kunciphisa kakhulu ukuguguleka kwezixhobo kunye nezinto.

4. Ukumelana neekhemikhali: Ibonisa ukumelana nokugqwala okugqwesileyo kwizisombululo ezininzi ze-asidi, i-alkali, kunye netyuwa, okwenza ukuba ifaneleke ukusetyenziswa kwiindawo ezigqwalisayo ezifana nokucubungula iikhemikhali.

6. Ucoceko kunye nokungabi nabungozi: Ihambelana nesatifikethi se-US FDA kunye ne-USDA, ingadibana ngqo nokutya kunye namayeza, kwaye isetyenziswa kakhulu kwimizi-mveliso yokulungisa ukutya kunye neyezonyango. Kwangaxeshanye, ayinamanzi amaninzi kwaye kulula ukuyivelisa iintsholongwane.

IV. Kutheni UkhethaIphepha le-UHMWPE? — Uthelekiso neSinyithi kunye nezinye iiplastiki zobuNjineli

1. Xa kuthelekiswa neMetal (umz., iCarbon Steel, iStainless Steel):

Ayigugi kakhulu: Ixesha layo lokuphila lidlula kakhulu elo lesinyithi phantsi kweemeko zokuguguleka.
Ilula: Ubunzima bayo buyi-0.93-0.94 g/cm³ kuphela, i-1/7 yentsimbi, nto leyo eyenza kube lula ukuyifaka nokuyithutha.

Akukho ngxolo: Isebenza ngokuthula, isusa isandi esiqatha sokungqubana kwesinyithi.

Ayimelani nokugqwala: Ayimelani nokugqwala kwaye ayimelani neekhemikhali.

2. Xa kuthelekiswa nezinye iiplastiki zobuNjineli (umz., iNylon, iPolyoxymethylene):

Ayigugi kakhulu: Ukumelana kwayo nokugugi kukhulu ngokuphindwe kaninzi.

Ukungqubana okusezantsi: Iimpawu zayo zokuzithambisa zingcono kakhulu.

Ayichaphazeli Impembelelo Ngakumbi: Iingenelo zayo zibonakala ngakumbi kumaqondo obushushu aphantsi.

Iphepha le-UHMWPEligcisa elinamandla kancinci kwicandelo lezixhobo zoshishino zanamhlanje. Nangona lingenamandla njengesinyithi, ukumelana nokuguguleka kwayo okungenakuthelekiswa nanto kunye nokusebenza kwayo okubanzi kuyenza ibe ngumdlali ongenakutshintshwa ekulweni nokuguguleka, ukunciphisa ukusetyenziswa kwamandla, kunye nokuphucula ukusebenza kakuhle. Ukusuka kwimigodi ukuya kwiikhitshi, ukusuka kwimizi-mveliso ukuya kwiindawo zemidlalo, ukuqina kweli phepha "leplastiki ilungileyo" kukhusela ukusebenza kwexesha elide kwezixhobo ezingenakubalwa, okwenza libe "ngumkhuseli omelana nokuguguleka" kunye "nomkhuseli wokuhamba kwamanzi" okwenyani kwicandelo lemveliso.