Polypropylene kapena PP ndi thermoplastic yotsika mtengo yomveka bwino, yonyezimira kwambiri komanso kulimba kwamphamvu.Ili ndi malo osungunuka kwambiri kuposa PE, zomwe zimapangitsa kuti zikhale zoyenera kwa mapulogalamu omwe amafunikira kutseketsa pa kutentha kwakukulu.Ilinso ndi chifunga chochepa komanso chowala kwambiri.Nthawi zambiri, zosindikizira kutentha za PP sizowoneka bwino ngati za LDPE.LDPE ilinso ndi mphamvu zong'ambika bwino komanso kukana kutentha kochepa.
PP imatha kupangidwa ndi zitsulo zomwe zimapangitsa kuti pakhale zotchinga mpweya wabwino pakugwiritsa ntchito movutikira komwe nthawi yayitali ya alumali ndiyofunikira.Makanema a PP ndi oyenera kugwiritsa ntchito mitundu yambiri yamakampani, ogula, ndi magalimoto.
PP imatha kubwezeredwanso ndipo imatha kusinthidwanso kukhala zinthu zina zambiri pazogwiritsa ntchito zosiyanasiyana.Komabe, mosiyana ndi mapepala ndi zinthu zina za cellulose, PP sichitha kuwonongeka.Pamwamba pake, zinyalala za PP sizipanga zinthu zapoizoni kapena zovulaza.
Mitundu iwiri yofunika kwambiri ndi polypropylene (CPP) yosasinthika (CPP) ndi biaxially oriented polypropylene (BOPP).Mitundu yonse iwiriyi imakhala ndi gloss yapamwamba, ma optics apadera, ntchito yabwino kapena yabwino kwambiri yosindikizira kutentha, kukana kutentha kwabwino kuposa PE, ndi zinthu zabwino zotchinga chinyezi.
Mafilimu a Cast Polypropylene (CPP)
Cast unoriented Polypropylene (CPP) nthawi zambiri amapeza ntchito zochepa kuposa biaxially oriented polypropylene (BOPP).Komabe, CPP yakhala ikukula pang'onopang'ono ngati chisankho chabwino kwambiri pamapaketi ambiri achikhalidwe komanso osayika.Mafilimu amatha kusinthidwa kuti agwirizane ndi ma CD, machitidwe, ndi zofunikira.Nthawi zambiri, CPP imakhala ndi misozi yambiri komanso kukana kukhudzidwa, kutentha kwabwinoko kuzizira komanso kusindikiza kutentha kuposa BOPP.
Mafilimu a Biaxially Oriented Polypropylene (BOPP)
Biaxially oriented polypropylene kapena BOPP1 ndiye filimu yofunika kwambiri ya polypropylene.Ndi njira yabwino yosinthira cellophane, pepala lopaka phula, ndi zojambulazo za aluminiyamu.Kuwongolera kumawonjezera mphamvu zamanjenje ndi kuuma, kumachepetsa kutalika (kovuta kutambasula), komanso kumapangitsa mawonekedwe a kuwala, komanso kumapangitsa kuti zinthu zotchinga mpweya ziziyenda bwino.Nthawi zambiri, BOPP imakhala ndi mphamvu zolimba kwambiri, modulus yapamwamba (kuuma), kutalika kocheperako, chotchinga mpweya wabwino, komanso chifunga chochepa kuposa CPP.
Mapulogalamu
Kanema wa PP amagwiritsidwa ntchito pazinthu zambiri zopakira wamba monga ndudu, maswiti, zokhwasula-khwasula ndi zofunda.Itha kugwiritsidwanso ntchito ngati zokutira zocheperako, zomangira matepi, matewera ndi zokutira zosabala zomwe zimagwiritsidwa ntchito pazachipatala.Chifukwa PP imakhala ndi zotchingira mpweya wapakati, nthawi zambiri imakutidwa ndi ma polima ena monga PVDC kapena acrylic omwe amawongolera kwambiri zotchinga zake.
Chifukwa cha fungo lochepa, kukana kwamankhwala komanso kusagwira bwino ntchito, masukulu ambiri a PP ndi oyenera kuyika mapulogalamu pansi pa malamulo a FDA.
Nthawi yotumiza: Apr-07-2022