Zida zopangira mabokosi apulasitiki zam'manja makamaka ndi polyethylene (pe) kapena polypropylene (pp). Zipangizozi zimakhala ndi kukhazikika kwabwino, kukana chinyezi, kukana mafuta ndi kukhazikika, ndipo ndizotsika mtengo, motero amagwiritsidwa ntchito kwambiri pazampani yopanga zakudya.
1. Polyethylene (PE)
Polyethylene ndi thermoplastic yolimba ndi kulimba mtima komanso kukana. Amagawidwa m'mitundu yosiyanasiyana ngati yotsika {{}}} Mabokosi a nkhomaliro nthawi zambiri amakhala ndi mawonekedwe abwino, ndi opepuka osati kuphweka, ndipo ndioyenera kudya.
2. Polypropylene (pp)
Polypropylene ndi semi {- crystalline thermoplastic ndi kutentha kwambiri, mphamvu yamakina ndi kukhazikika kwamakina. Mabokosi a nkhomaliro ya polypropylene amatha kupirira kutentha kwambiri, motero nthawi zambiri amagwiritsidwa ntchito ponyamula chakudya chomwe chikufunika kutenthetsedwa kapena microwid.
