Yiziphi izinhlobo zezikhwama ezilukiweyo

I-polyethylene (PE) ikhiqizwa ikakhulukazi emazweni angaphandle, futhiI-Polypropylene(PP) ikhiqizwa ikakhulukazi eChina.Iwuhlobo lwe-thermoplastic resin eyenziwe nge-polymerization ye-ethylene.Embonini, ama-copolymers e-ethylene anenani elincane le-α - olefins nawo afakiwe.I-Polyethylene ayinaphunga, ayinabuthi, inengcina, inokumelana kahle nezinga lokushisa eliphansi kakhulu (izinga lokushisa eliphansi kakhulu lingafinyelela - 70 ～ - 100 ℃), ukusimama okuhle kwamakhemikhali, ukumelana nokuguguleka kwe-asidi kanye ne-alkali (okungazweli ku-oxidizing acid), ayincibiliki ezithanjeni ezivamile. ekushiseni kwekamelo, ukumuncwa kwamanzi aphansi kanye nokufakwa kukagesi okuhle kakhulu;kodwa i-polyethylene izwela kakhulu ekucindezelekeni kwemvelo (isenzo samakhemikhali nesemishini) Ukumelana nokuguga kokushisa kubi.Izakhiwo ze-polyethylene ziyahlukahluka kusuka ezinhlobonhlobo kuya ezihlukahlukene, ikakhulukazi kuye ngokuthi isakhiwo samangqamuzana nobuningi.Ukuminyana okuhlukile (0.91-0.96 g / cm3) kwemikhiqizo kungatholwa ngezindlela ezihlukene zokukhiqiza.

I-polyethylene ingacutshungulwa ngendlela yokubumba ye-thermoplastic evamile (bheka ukucubungula kwepulasitiki).Isetshenziswa kabanzi ekwenzeni amafilimu, iziqukathi, amapayipi, ama-monofilaments, izintambo nezintambo, izidingo zansuku zonke, njll. ingasetshenziswa futhi njengezinto zokuvikela imvamisa ephezulu ye-TV, i-radar, njll. Ngokuthuthuka kwemboni ye-petrochemical, ukukhiqizwa. i-polyethylene ithuthuke ngokushesha, futhi okukhiphayo kubala cishe i-1/4 yomkhiqizo wepulasitiki ophelele.Ngo-1983, umthamo wokukhiqiza we-polyethylene emhlabeni wonke wawungu-24.65 MT, futhi umthamo wesitshalo esakhiwa wawungu-3.16 Mt.

I-Polypropylene(PP)

I-resin ye-thermoplastic etholwe yi-polymerization ye-propylene.Kukhona ukucushwa okuthathu kwento ye-isotactic, into engahleliwe kanye ne-sydiotactic substance.Into ye-Isotactic iyingxenye eyinhloko yemikhiqizo yezimboni.I-Polypropyleneihlanganisa nama-copolymers e-propylene anenani elincane le-ethylene.Ngokuvamile i-translucent engenambala eqinile, engenaphunga engenabuthi.Ngenxa yesakhiwo sayo esijwayelekile kanye nokucwebezela okuphezulu, indawo yokuncibilika iphezulu njengo-167 ℃, futhi imikhiqizo ingavalwa inzalo ngesitimu.Ukuminyana kungu-0.90g/cm3, okuyipulasitiki evamile elula kakhulu.Ukumelana nokugqwala, amandla aqinile angu-30MPa, amandla, ukuqina nokungafihli lutho kungcono kune-polyethylene.Ukungalungi ukungakwazi ukumelana nomthelela wokushisa okuphansi nokuguga kalula, okunganqotshwa ngokuguqulwa nokwengeza i-antioxidant ngokulandelanayo.

Umbala weizikhwama ezilukiwengokuvamile imhlophe noma impunga imhlophe, ayinabo ubuthi futhi ayinambitheki, futhi ngokuvamile ayinabungozi emzimbeni womuntu.Nakuba yenziwe ngamapulasitiki amakhemikhali ahlukahlukene, ukuvikeleka kwayo kwemvelo kunamandla, futhi amandla ayo okugaywa kabusha makhulu;

Izikhwama ezilukiweyos asetshenziswa kabanzi, ikakhulukazi ukupakisha nokupakisha izihloko ezahlukahlukene, futhi asetshenziswa kakhulu embonini;

Ipulasitikiizikhwama ezilukiweyenziwe ngeI-Polypropylenei-resin njengento eluhlaza eyinhloko, ekhishwa futhi yelulwe ibe umcu oyisicaba, bese ilukwa bese yenziwa isikhwama.

Ipulasitiki ehlanganisiweizikhwama ezilukiweyenziwe ngendwangu elukiwe yepulasitiki nge-tape casting.

Lolu chungechunge lwemikhiqizo lusetshenziselwa ukupakisha impushana noma izinto eziqinile eziyimbudumbudu kanye nezihloko eziguquguqukayo.Ipulasitiki ehlanganisiweizikhwama ezilukiweihlukaniswe kabili esikhwameni esisodwa futhi ezintathu esikhwameni esisodwa ngokusho kokwakheka okuyinhloko.

Ngokwendlela yokuthunga, ingahlukaniswa isikhwama esingaphansi sokuthunga, isikhwama esingaphansi sokuthunga, isikhwama sokufaka kanye nesikhwama sokuthunga sokunamathela.

Ngokobubanzi obusebenzayo besikhwama, singahlukaniswa sibe ngu-350, 450, 500, 550, 600, 650 kanye no-700mm, futhi imininingwane ekhethekile izovunyelwa umphakeli kanye nomfunayo.