iimveliso

I-Polyethylene yoxinano oluphantsi,
I-Polyethylene yoxinano oluphantsi,

I-Low-density polyethylene (LDPE) yi-resin eyenziweyo esebenzisa inkqubo yoxinzelelo oluphezulu nge-polymerization yamahhala ye-ethylene kwaye ke ibizwa ngokuba "yi-polyethylene ephezulu yoxinzelelo".Ekubeni ikhonkco layo lemolekyuli linamasebe amaninzi amade namafutshane, i-LDPE ingaphantsi kwekristale kune-high-density polyethylene (HDPE) kwaye ubuninzi bayo buphantsi.Ibonisa ukukhanya, ukuguquguquka, ukuxhathisa okulungileyo komkhenkce kunye nokumelana nempembelelo.I-LDPE izinzile ngokwekhemikhali.Inokumelana kakuhle ne-acids (ngaphandle kwe-acid oxidizing kakhulu), i-alkali, ityuwa, iipropati ezigqwesileyo zombane.Isantya sokungena komphunga siphantsi.I-LDPE inolwelo oluphezulu kunye nokuqhubekeka kakuhle.Ilungele ukusetyenziswa kuzo zonke iintlobo zeenkqubo zokusetyenzwa kwe-thermoplastic, ezinje ngenaliti yokubumba, ukubumba i-extrusion, ukubunjwa kokuvuthela, i-rotomolding, i-coating, i-foaming, i-thermoforming, i-jet-jet welding kunye ne-thermal welding.

Isicelo

I-LDPE isetyenziselwa ikakhulu ukwenza iifilimu.Isetyenziswa kakhulu kwimveliso yefilimu yezolimo (ifilimu yokugquma ifilimu kunye nefilimu ephalaziweyo), ifilimu yokupakisha (esetyenziselwa ukupakisha iilekese, imifuno kunye nokutya okunomkhenkce), ifilimu evuthelweyo yokupakisha ulwelo (ukusetyenziswa ekupakisheni ubisi, isosi yesoya, ijusi, iibhontshisi zebhontshisi kunye nobisi lwe-soy), iingxowa zokupakisha ezinzima, ifilimu yokupakisha i-shrinkage, ifilimu e-elastic, ifilimu ye-lining, ifilimu yesakhiwo, ifilimu yokupakisha imveliso jikelele kunye neengxowa zokutya.I-LDPE ikwasetyenziswa ngokubanzi kwimveliso yocingo kunye ne-cable insulation sheath.I-LDPE edibeneyo i-Cross-link iyona nto isetyenziswayo kwi-insulation layer ye-high-voltage cables.I-LDPE ikwasetyenziswa kwimveliso yeenaliti ezibunjiweyo (ezifana neentyatyambo ezenziweyo, izixhobo zonyango, amayeza kunye nemathiriyeli yokupakishwa kokutya) kunye neityhubhu ezibunjiweyo, iipleyiti, iingcingo kunye neentambo zokugquma kunye neemveliso zeplastiki ezineprofayili.I-LDPE ikwasetyenziselwa ukwenza iimveliso ezibunjiweyo ezibunjwe ngokuvuthela njengezikhongozeli zokubamba ukutya, amayeza, izinto zokuthambisa kunye neemveliso zekhemikhali, kunye namatanki.

Ukupakishwa, uGcino kunye noThutho

I-LDPE sisishunqulelo se-Low Density Polyethylene.I-polyethylene yenziwe nge-polymerization ye-ethylene.(I-Poly ithetha 'ininzi'; enyanisweni, ithetha i-ethylene eninzi).I-ethylene ifumaneka ngokukrazula i-petroleum derivative elula efana ne-naphtha.

Ubuninzi obuphantsi bufunyanwa yinkqubo ye-polymerization yoxinzelelo oluphezulu.Oku kudala iimolekyuli ezinamasebe amaninzi asecaleni.Amasebe asecaleni aqinisekisa ukuba iqondo le-crystallization lihlala liphantsi.Ngamanye amazwi, ngenxa yobume bazo obungaqhelekanga, iimolekyuli azikwazi ukulala okanye phezu kwenye ngendlela elungelelaniswe kakuhle, ukuze zibe ngaphantsi kwazo zingene kwindawo ethile.I-degree of crystallization ephantsi, iyancipha ubuninzi bezinto eziphathekayo.

Umzekelo omhle woku kubomi bemihla ngemihla ngamanzi kunye nomkhenkce.Umkhenkce ngamanzi akwimo (ephezulu) ecwebezelayo, kwaye ke ngoko ukhaphukhaphu kakhulu kunamanzi (umkhenkce onyibilikisiweyo).

I-LDPE luhlobo lwe-thermoplastic.Yiplastiki ethambisayo xa ishushu, ngokungafaniyo nerabha umzekelo.Oku kwenza i-thermoplastics ilungele ukusetyenziswa kwakhona.Emva kokufudumeza, inokungeniswa kwezinye iimilo ezifunwayo.