Ziziphi iintlobo zeengxowa ezilukiweyo

I-polyethylene (PE) iveliswa ikakhulu kumazwe angaphandle, kwayePolypropylene(PP) iveliswa ikakhulu eTshayina.Luhlobo lwe-resin ye-thermoplastic eyenziwe nge-polymerization ye-ethylene.Kwishishini, i-copolymers ye-ethylene kunye nenani elincinci le-α - olefins nazo zibandakanyiwe.I-Polyethylene ayinavumba, ayinatyhefu, i-waxy, inokumelana nobushushu obuphantsi kakhulu (elona qondo lobushushu lisezantsi linokufikelela - 70 ～ - 100 ℃), uzinzo olululo lwekhemikhali, luxhathisa kukhukuliseko lwe-asidi kunye ne-alkali (engaxhathisi kwi-asidi ene-oxidizing), ayinyibiliki kwizinyibilikisi ngokubanzi. kwiqondo lobushushu begumbi, ukufunxwa kwamanzi aphantsi kunye nokufakelwa kombane okugqwesileyo;kodwa i-polyethylene inomdla kakhulu kuxinzelelo lokusingqongileyo (ikhemikhali kunye nesenzo soomatshini) Ukumelana nokuguga kobushushu kubi.Iipropati ze-polyethylene ziyahlukahluka kwiintlobo ezahlukeneyo, ngokukodwa kuxhomekeke kwisakhiwo se-molecular and density.Ukuxinana okuhlukeneyo (0.91-0.96 g / cm3) kweemveliso kunokufumaneka ngeendlela ezahlukeneyo zokuvelisa.

I-polyethylene inokucutshungulwa ngendlela yokubumba ye-thermoplastic ngokubanzi (jonga ukusetyenzwa kweplastiki).Isetyenziselwa ngokubanzi ukwenza iifilimu, izikhongozeli, imibhobho, i-monofilaments, iingcingo kunye neentambo, iimfuno zemihla ngemihla, njl njl. ye-polyethylene iphuhliswe ngokukhawuleza, kwaye i-akhawunti yemveliso malunga ne-1 / 4 yemveliso yeplastiki iyonke.Kwi-1983, umthamo wemveliso we-polyethylene emhlabeni wonke wawuyi-24.65 MT, kwaye umthamo wesityalo esakhiwayo sasiyi-3.16 Mt.

Polypropylene(PP)

I-resin ye-thermoplastic efunyenwe nge-polymerization yepropylene.Kukho ulungelelwaniso oluthathu lwento ye-isotactic, i-random substance kunye ne-sydiotactic substance.Into ye-Isotactic yeyona nto iphambili yeemveliso zoshishino.Polypropyleneikwabandakanya iicopolymers zepropylene kunye nenani elincinci le-ethylene.Ngokwesiqhelo translucent eqinileyo, engenavumba, ayinabungozi.Ngenxa yobume bayo obuqhelekileyo kunye nekristali ephezulu, indawo yokunyibilika iphezulu njenge-167 ℃, kwaye iimveliso zinokuvalwa inzala ngomphunga.Uxinaniso yi-0.90g/cm3, eyona plastiki ilula ngokubanzi.Ukumelana nokubola, amandla okuqina angama-30MPa, amandla, ukuqina kunye nokungafihli ngcono kune-polyethylene.Izinto ezingeloncedo kukunganyangeki kwefuthe eliphantsi lobushushu kunye nokuguga okulula, okunokoyiswa ngokuguqulwa kunye nokongeza i-antioxidant ngokulandelelanayo.

Umbala weiingxowa ezilukiweyoimhlophe okanye ingwevu, imhlophe, ayinatyhefu kwaye ayinancasa, kwaye ayinabungozi kangako emzimbeni womntu.Nangona yenziwe ngeeplastiki ezahlukeneyo zeekhemikhali, ukukhuselwa kwayo kokusingqongileyo komelele, kwaye amandla ayo okuphinda asetyenziswe makhulu;

Iingxowa ezilukiweyos zisetyenziswa ngokubanzi, ikakhulu ukupakisha kunye nokupakisha amanqaku ahlukeneyo, kwaye asetyenziswa ngokubanzi kushishino;

Iplastikiiingxowa ezilukiweyoyenziwe ngePolypropylenei-resin njengeyona mathiriyeli ekrwada, ethi ikhutshelwe kwaye yolulelwe ibe yintsinga esicaba, emva koko ilukwe kwaye yenziwe ibesingxobo.

Iplastiki edibeneyoiingxowa ezilukiweyoyenziwe ngelaphu elilukiweyo leplastiki ngokufaka iteyiphu.

Olu chungechunge lweemveliso zisetyenziselwa ukupakisha umgubo okanye izinto eziqinileyo zegranular kunye namanqaku aguquguqukayo.Iplastiki edibeneyoiingxowa ezilukiweyoihlulwe zibe zimbini kwingxowa enye kwaye ezintathu kwingxowa enye ngokwezinto eziphambili.

Ngokwendlela yokuthunga, inokwahlulwa ibe yingxowa esezantsi yokuthunga, ibhegi esezantsi yokuthunga, ibhegi yokufaka kunye nebhegi yokuncamathelisa.

Ngokobubanzi obusebenzayo besikhwama, inokwahlulwa ibe yi-350, 450, 500, 550, 600, 650 kunye ne-700mm, kwaye iinkcukacha ezikhethekileyo ziya kuvunyelwana ngumthengisi kunye nomceli.