[Izinhlobo zezikhwama ezilukiwe]

Ukukhiqizwa kwamanye amazwe ikakhulukazi i-polyethylene (PE), ukukhiqizwa kwasekhaya ikakhulukazi i-polypropylene (PP), iwuhlobo lwe-thermoplastic resin ekhiqizwa i-ethylene polymerization. Ngokwezimboni, kuhlanganisa nama-copolymers e-ethylene anamanani amancane -olefin. I-polyethylene ayinaphunga, ayinabuthi, izwakala njengengcina, inokumelana okuhle kakhulu nokushisa okuphansi (izinga lokushisa eliphansi kakhulu lokusetshenziswa lingaba -70 ~ -100 ℃), ukusimama okuhle kwamakhemikhali, lingamelana nokuguguleka kwe-asidi ne-alkali (akukho oxidation ye-asidi), izinga lokushisa lekamelo elingancibiliki kuzinyibilikisi ezijwayelekile, ukumuncwa kwamanzi amancane, ukusebenza kahle kokufakwa kukagesi; Kodwa i-polyethylene iyazwela ekucindezelekeni kwemvelo (imiphumela yamakhemikhali nemishini) futhi inokumelana okungalungile nokuguga okushisayo. Izakhiwo ze-polyethylene ziyahlukahluka ezinhlotsheni kuya kwezinhlobo, ikakhulukazi kuye ngesakhiwo samangqamuzana nokuminyana. Imikhiqizo enobuningi obuhlukene (0.91 ~ 0.96g/cm3) ingatholwa ngokusebenzisa izindlela ezihlukene zokukhiqiza. I-polyethylene ingacutshungulwa ngendlela evamile yokubumba i-thermoplastic (bheka ukucubungula kwepulasitiki). Isetshenziswa kabanzi ekwenzeni ifilimu, isitsha, ipayipi, intambo eyodwa, intambo kanye nekhebula, izidingo zansuku zonke, njll., futhi ingasetshenziswa njengezinto zokufakelwa kwe-TV, i-radar, njll. Ngokuthuthukiswa kwemboni ye-petrochemical, ukukhiqizwa kwe-polyethylene kuye kwathuthukiswa ngokushesha, ukukhishwa cishe kwe-1/4 yokukhiqizwa kwepulasitiki okuphelele. Ngo-1983, umthamo ophelele wokukhiqiza we-polyethylene wawungu-24.65Mt, futhi umthamo wesitshalo esakhiwa wawungu-3.16Mt.

I-Polypropylene (PP)

I-resin ye-thermoplastic elungiselelwe i-polymerization ye-propylene. Kukhona ukucushwa okuthathu kwemikhiqizo ye-isochronous, engalawulwa kanye ne-interchronous, futhi imikhiqizo ye-isochronous iyingxenye eyinhloko yemikhiqizo yezimboni. I-Polypropylene ihlanganisa nama-copolymers e-propylene kanye nenani elincane le-ethylene. Ngokuvamile i-translucent engenambala eqinile, engenaphunga engenabuthi. Ngenxa yokuthi isakhiwo sicocekile futhi sicwebezeliswe kakhulu, ngakho-ke indawo encibilikayo ifika ku-167 ℃, ukumelana nokushisa, imikhiqizo ingasetshenziswa ukukhishwa kwe-steam disinfection yizinzuzo zayo ezivelele. Ngobukhulu obungu-0.90g/cm3, iyipulasitiki elula kunazo zonke. Ukumelana nokugqwala, amandla aqinile angu-30MPa, amandla, ukuqina nokungafihli lutho kungcono kune-polyethylene. Ububi buwukumelana nomthelela ophansi wokushisa nokuguga kalula, okunganqotshwa ngokuguqulwa nokwengezwa kwe-antioxidant ngokulandelanayo.

Umbala wesikhwama esilukiweyo ngokuvamile umhlophe noma umpunga omhlophe, awunabo ubuthi futhi awunambitheki, ngokuvamile awulimazi kangako umzimba womuntu, nakuba wenziwa amapulasitiki amakhemikhali ahlukahlukene, kodwa ukuvikelwa kwawo kwemvelo kunamandla, futhi amandla okugaywa kabusha makhulu;

Izikhwama ezilukiweyo zisetshenziswa kakhulu, ikakhulukazi ezisetshenziselwa ukupakisha nokupakisha izihloko ezihlukahlukene, ezisetshenziswa kakhulu embonini;

Isikhwama esilukiwe sepulastiki senziwe nge-polypropylene resin njengento eluhlaza eyinhloko, ekhishwa futhi yelulwe ibe usilika oyisicaba, bese selukwa bese kwenziwa izikhwama.

Isikhwama esilukiwe sepulasitiki esiyinhlanganisela sisekelwe kwindwangu elukiwe yepulasitiki, eyenziwe ngendlela yokugoqa.

Lolu chungechunge lwemikhiqizo lusetshenziselwa ukupakisha impushana noma izinto eziqinile eziyimbudumbudu kanye nezihloko eziguquguqukayo. Isikhwama esilukiwe sepulasitiki esiyinhlanganisela sihlukaniswe izikhwama ezimbili ku-one kanye nezikhwama ezintathu ku-one ngokusho kokwakheka okuyinhloko.

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

Ngokuvumelana nobubanzi obusebenzayo besikhwama, singahlukaniswa sibe ngu-350, 450, 500, 550, 600, 650 no-700mm. Ukucaciswa okukhethekile kuzovunyelwa yizinhlangothi zombili.