Ukuminyana okuphansi kwe-polyethylene resin
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-resin ifakwe ezikhwameni ezilukiwe ze-polypropylene ezifakwe ngaphakathi ngefilimu.Isisindo esiphelele singama-25Kg/isikhwama.I-resin kufanele igcinwe endaweni yokugcina impahla, eyomile futhi kude nomlilo kanye nelanga eliqondile.Akufanele inqwabelane endaweni evulekile.Ngesikhathi sokuthutha, umkhiqizo akufanele ubekwe elangeni elinamandla noma imvula futhi akufanele uhanjiswe kanye nesihlabathi, inhlabathi, izinsimbi ezilahliwe, amalahle noma ingilazi.Ukuhamba nezinto ezinobuthi, ezonakalisayo nezivuthayo akuvunyelwe ngokuphelele.
