[Mitundu ya zikwama zoluka]

Kupanga kunja makamaka polyethylene (PE), zoweta zoweta makamaka polypropylene (PP), ndi mtundu wa thermoplastic utomoni opangidwa ndi ethylene polymerization. Mu mafakitale, mumaphatikizanso ma copolymers a ethylene okhala ndi -olefin pang'ono. Polyethylene odorless, sanali poizoni, amamva ngati sera, ali kwambiri otsika kutentha kukana (otsika kwambiri ntchito kutentha kungakhale mpaka -70 ~ -100 ℃), wabwino mankhwala bata, akhoza kupirira ambiri a asidi ndi zamchere kukokoloka (palibe makutidwe ndi okosijeni wa asidi), chipinda kutentha insoluble mu zosungunulira ambiri, mayamwidwe ang'onoang'ono madzi, kwambiri magetsi kutchinjiriza ntchito; Koma polyethylene imakhudzidwa ndi kupsinjika kwa chilengedwe (mankhwala ndi makina opangira) ndipo imakhala yosakanizidwa ndi kukalamba kwamafuta. Makhalidwe a polyethylene amasiyana mitundu ndi mitundu, makamaka kutengera kapangidwe ka maselo ndi kachulukidwe. Zogulitsa zomwe zimakhala ndi kachulukidwe kosiyanasiyana (0.91 ~ 0.96g/cm3) zitha kupezeka pogwiritsa ntchito njira zosiyanasiyana zopangira. Polyethylene imatha kukonzedwa ndi njira yanthawi zonse yopangira thermoplastic (onani mapulasitiki apulasitiki). Amagwiritsidwa ntchito kwambiri popanga filimu, chidebe, chitoliro, waya umodzi, waya ndi chingwe, zofunikira za tsiku ndi tsiku, ndi zina zotero, ndipo zingagwiritsidwe ntchito ngati zipangizo zamakono zopangira ma TV, radar, ndi zina zotero. Mu 1983, okwana mphamvu yopanga polyethylene anali 24.65Mt, ndi mphamvu zomera pansi kumangidwa anali 3.16Mt.

Polypropylene (PP)

A thermoplastic utomoni wokonzedwa ndi polymerization wa propylene. Pali masanjidwe atatu a isochronous, osalamuliridwa komanso ma interchronous, ndipo zinthu za isochronous ndizo zigawo zazikulu zazinthu zamakampani. Polypropylene imaphatikizansopo ma copolymers a propylene ndi ethylene pang'ono. Nthawi zambiri translucent colorless olimba, fungo osati poizoni. Chifukwa kapangidwe kake ndi kowoneka bwino komanso kowoneka bwino kwambiri, kotero malo osungunuka mpaka 167 ℃, kukana kutentha, zinthu zitha kugwiritsidwa ntchito kupha tizilombo toyambitsa matenda ndi zabwino zake. Ndi kachulukidwe ka 0.90g/cm3, ndiye pulasitiki yopepuka kwambiri padziko lonse lapansi. Kukana kwa dzimbiri, kulimba kwamphamvu 30MPa, mphamvu, kukhazikika komanso kuwonekera ndizabwino kuposa polyethylene. Choyipa chake ndi kukana kutsika kwa kutentha komanso kukalamba kosavuta, komwe kumatha kugonjetsedwe ndikusinthidwa ndikuwonjezera antioxidant motsatana.

Mtundu wa thumba nsalu zambiri woyera kapena imvi woyera, sanali poizoni ndi zoipa, zambiri zosavulaza thupi la munthu, ngakhale kuti amapangidwa ndi zosiyanasiyana mapulasitiki mankhwala, koma kuteteza chilengedwe ndi wamphamvu, ndipo mphamvu yobwezeretsanso ndi yaikulu;

Matumba owongoka amagwiritsidwa ntchito kwambiri, omwe amagwiritsidwa ntchito kwambiri polongedza ndi kulongedza zinthu zosiyanasiyana, zomwe zimagwiritsidwa ntchito kwambiri m'makampani;

Chikwama cholukidwa cha pulasitiki chimapangidwa ndi utomoni wa polypropylene monga chopangira chachikulu, chomwe chimatulutsidwa ndikutambasulidwa kukhala silika wathyathyathya, kenako kuwomba ndi kupanga matumba.

Chikwama chopangidwa ndi pulasitiki chopangidwa ndi pulasitiki chimachokera ku nsalu ya pulasitiki, yomwe imapangidwa ndi njira yogudubuza.

Mndandanda wazinthuzi umagwiritsidwa ntchito kulongedza ufa kapena zida zolimba za granular ndi zolemba zosinthika. Chikwama cha pulasitiki chophatikizika chimagawidwa mu thumba limodzi ndi atatu mu thumba limodzi molingana ndi kapangidwe kake.

Malinga ndi njira yosokera, imatha kugawidwa m'thumba la pansi, thumba la pansi, kuyika thumba ndi thumba lomangira.

Malinga ndi m'lifupi mwake ogwira thumba, akhoza kugawidwa mu 350, 450, 500, 550, 600, 650 ndi 700mm. Mafotokozedwe apadera adzavomerezedwa ndi onse awiri.