Matumba oluka amapangidwa ndi zinthu

Chikwama cholukidwa ndi thumba la pulasitiki lomwe nthawi zambiri limagwiritsidwa ntchito, makamaka lopangidwa ndi polyethylene kapena polypropylene, lotambasulidwa kukhala silika wathyathyathya, kenako wolukidwa, kuluka ndi matumba.Chifukwa mphamvu, kulimba ndi kuwonekera kwa polypropylene ndikwabwino kuposa polyethylene, chifukwa chake imagwiritsidwa ntchito kwambiri, ntchito ya matumba oluka imakhalanso yochulukirapo.Amagwiritsidwa ntchito kwambiri ngati matumba onyamula ndipo amatha kunyamula katundu wamakampani ndi zaulimi.Chakudya, etc. Komanso, zokopa alendo.Zikwama zolukidwa zimagwiritsidwanso ntchito polimbana ndi kusefukira kwa madzi komanso kuthandiza pakagwa masoka.

Chikwama cholukidwa, chomwe chimadziwikanso kuti thumba lachikopa cha njoka, ndi mtundu wa thumba la pulasitiki, lomwe limagwiritsidwa ntchito kwambiri pakuyika, ndiye kuti thumba la pulasitiki loluka ndi chiyani?Nthawi zambiri, zikwama zoluka zimakhala ndi zida ziwiri:

1. Polyethylene

Imadziwikanso kuti pulasitiki ya PE ndi utomoni wa thermoplastic wopangidwa ndi ethylene polymerization.Chikwama chopangidwa ndi pulasitiki cha polyethylene chimakhala ndi ntchito yabwino, koma polyethylene imakhudzidwa ndi kupsinjika kwa chilengedwe, kukana kutentha komanso kukalamba, chifukwa chake imagwiritsidwa ntchito mochepera ku China.

2. Polypropylene

Nthawi zambiri, matumba ambiri oluka ku China amapangidwa ndi polypropylene.Polypropylene (PP) ndi utomoni wa thermoplastic wopangidwa kuchokera ku acrylic polima wokhala ndi zinthu za isotropic.Mwachisawawa ndi intergauge masanjidwe atatu, mphamvu yake.The rigidity ndi kuwonekera bwino kuposa polyethylene, ndipo akhoza kusinthidwa ndi anawonjezera antioxidants kuthana otsika kutentha zimakhudza kukana, zosavuta kukalamba zofooka.

Mu mankhwala apulasitiki, pulasitiki kuluka ndi mtundu wa zinthu kusintha ndi mkulu kuswa mphamvu, amene amagwirizana ndi kapangidwe kake maselo, crystallinity, drafting malangizo ndi mtundu zina.Ngati pulasitiki yoluka imayesedwa ndi mphamvu yeniyeni (mphamvu / mphamvu yokoka), imakhala yapamwamba kuposa kapena pafupi ndi chitsulo.

Kutentha kwachipinda, nsalu zolukidwa za pulasitiki zimalimbana ndi kukokoloka kwa madzi, ndipo mayamwidwe amadzi amakhala osakwana 0 mkati mwa maola 24.01%.Kuthekera kwa madzi nakonso kumakhala kochepa kwambiri.Pa kutentha kochepa, zimakhala zowawa.Zomangira za pulasitiki sizipanga nkhungu.