imikhiqizo

I-Low Density Polyethylene,
I-Low Density Polyethylene,

I-Low-density polyethylene (LDPE) iyinhlaka yokwenziwa esebenzisa inqubo yokucindezela okuphezulu nge-polymerization yamahhala ye-ethylene futhi ngenxa yalokho ibizwa nangokuthi "i-polyethylene ephezulu yokucindezela".Njengoba iketango layo lamangqamuzana linamagatsha amaningi amade namafushane, i-LDPE ine-crystalline encane kune-high-density polyethylene (HDPE) futhi ukuminyana kwayo kuphansi.Ifaka ukukhanya, okuguquguqukayo, ukumelana okuhle kokuqhwa kanye nokumelana nomthelela.I-LDPE izinzile kumakhemikhali.Inokumelana okuhle nama-acids (ngaphandle kwama-acid oxidizing aqinile), i-alkali, usawoti, izakhiwo ezinhle kakhulu zokufaka ugesi.Izinga layo lokungena komhwamuko liphansi.I-LDPE ine-fluidity ephezulu kanye nokucutshungulwa okuhle.Ilungele ukusetshenziswa kuzo zonke izinhlobo zezinqubo zokucubungula i-thermoplastic, njengokubunjwa komjovo, ukubumba kwe-extrusion, ukubunjwa kwe-blow, i-rotomolding, i-coating, igwebu, i-thermoforming, i-hot-jet welding kanye ne-thermal welding.

Isicelo

I-LDPE isetshenziselwa ngokuyinhloko ukwenza amafilimu.Isetshenziswa kabanzi ekukhiqizeni ifilimu yezolimo (ifilimu yokuhlanganisa ifilimu kanye nefilimu echithiwe), ifilimu yokupakisha (ukuze isetshenziselwe ukupakisha amaswidi, imifino nokudla okuqandisiwe), ifilimu ephephethwayo yokupakisha uketshezi (ozosetshenziswa ekupakisheni ubisi, isoso yesoya, ijusi, ubisi lwebhontshisi nobisi lwesoya), izikhwama zokupakisha ezisindayo, ifilimu yokupakisha enciphayo, ifilimu enwebekayo, ifilimu ye-lining, ifilimu yesakhiwo, ifilimu yokupakisha yezimboni enenhloso ejwayelekile kanye nezikhwama zokudla.I-LDPE isetshenziswa kabanzi ekukhiqizeni i-wire & cable insulation sheath.I-LDPE exhunywe ngokuphambana iyinto eyinhloko esetshenziswa kungqimba lokufakwa kwamakhebula anamandla kagesi aphezulu.I-LDPE iphinde isetshenziswe ekukhiqizeni imikhiqizo ebunjwe ngomjovo (njengezimbali zokwenziwa, amathuluzi ezokwelapha, umuthi nezinto zokupakisha zokudla) kanye namashubhu abunjwe ngokukhishwa kwe-extrusion, amapuleti, izintambo ezinezintambo nezintambo kanye nemikhiqizo yepulasitiki enephrofayili.I-LDPE iphinde isetshenziselwe ukwenza imikhiqizo engenalutho ebunjiwe njengeziqukathi zokubamba ukudla, imithi, izimonyo nemikhiqizo yamakhemikhali, namathangi.

Iphakheji, Isitoreji kanye Nezokuthutha

I-LDPE isifinyezo se-Low Density Polyethylene.I-polyethylene yenziwa nge-polymerization ye-ethylene.(I-Poly isho 'okuningi'; empeleni, isho i-ethylene eningi).I-ethylene itholakala ngokuchoboza okuphuma ku-petroleum okulula njenge-naphtha.

Ubuningi obuphansi butholakala ngenqubo ye-polymerization yokucindezela okuphezulu.Lokhu kwakha ama-molecule anamagatsha amaningi aseceleni.Amagatsha aseceleni aqinisekisa ukuthi izinga le-crystallization lihlala liphansi.Ngamanye amazwi, ngenxa yesimo sawo esingajwayelekile, ama-molecule awakwazi ukulala phakathi noma phezu kwelinye ngendlela ehlelekile, ukuze amancane awo alingane endaweni ethile.Idigri ephansi yecrystallization, iyancipha ukuminyana kwento.

Isibonelo esihle salokhu ekuphileni kwansuku zonke amanzi neqhwa.Iqhwa lingamanzi asesimweni (esiphezulu) esicwebezelayo, ngakho-ke lilula kakhulu kunamanzi (iqhwa elincibilikisiwe).

I-LDPE iwuhlobo lwe-thermoplastic.Iwupulasitiki othambisayo uma ushiselwa, ngokungafani nerabha ngokwesibonelo.Lokhu kwenza i-thermoplastic ifanele ukusetshenziswa kabusha.Ngemuva kokushisa, ingalethwa kwezinye izimo ezifunwayo.