Chiyambi Chachikwama Chopakira Chakudya

Anthu ambiri sadziwa zakuthupimatumba onyamula zakudyaamapangidwa kawirikawiri.Woona mtima adzafotokoza mwachidule zipangizo zathumba la chakudyas.

Zinthu zopangira chakudya: PVDC (polyvinylidene chloride), PE (polyethylene), PP (polypropylene), PA (nayiloni), EVOH (ethylene/vinyl alcohol copolymer), filimu yotayidwa (aluminium + PE), ndi zina zambiri.
Kupanga filimu kungagawidwe: filimu yotambasula, filimu yowombedwa.
Pakadali pano, zida zazikulu zomwe zimagwiritsidwa ntchito pakuyika chakudya ndi PP ndi PE, ndiye kuti, polypropylene ndi mapulasitiki a polyethylene.Pazinthu zonse ziwiri, kuyika chakudya kumatha kukhutitsidwa.
Poyerekeza ndi zonyamula zopanda chakudya, PP ndi PE alibe zowonjezera pulasitiki.Tonse tikudziwa kuti zowonjezera pulasitiki zimakhudza kwambiri thupi la munthu, makamaka thanzi la ana.PP ndi PE sizidzatulutsa zinthu zoopsa panthawi yogwiritsira ntchito.Zida zina zimatha kuyambitsa khansa, koma PP ndi PE sizitero.Kupaka kwa PVC komwe kumagwiritsidwa ntchito ngati filimu yotsamira, koma chifukwa cha kusatetezeka kwake, kumasinthidwa pang'onopang'ono ndi filimu ya PE.
Makhalidwe a PE ndi awa: zofewa, zamakina zimakhala zosauka kuposa PP, mankhwala oyimira amaphatikizapo matumba ogula masitolo akuluakulu, mapepala apulasitiki, matumba a zinyalala, etc. PP ndizovuta, anisotropic (ndizosavuta kung'amba ngati pali kusiyana), makina abwino katundu, ndi ntchito kutentha kwambiri kuposa PE, kutanthauza kuti mankhwala ali matumba mkate.
Nthawi zambiri malinga ndi kapangidwe kazinthu, wosanjikiza wamkati ndi PE kapena CPP, wosanjikiza wakunja ndi PA, PET, wapakati akhoza kukhala EVOH kapena PVDC, ndi zina zambiri, ndipo ena ndi filimu yopangidwa ndi aluminiyamu kapena zojambulazo za aluminiyamu.

PE ndi CPP zili ndi zinthu zabwino zosindikizira kutentha, ndiko kuti, ndizosavuta kusindikiza.
PA ndi PET zimasindikizidwa bwino ndipo zimatha kugwiritsidwa ntchito kunja kuti zisindikize zithunzi zokongola.
PVDC ndi EVOH zili ndi zotchinga zabwino komanso zimalepheretsa okosijeni.
Mafilimu opangidwa ndi aluminiyamu ndi zojambulazo zimakhala ndi zinthu zabwino zotetezera kuwala ndipo ndizoyenera kuzinthu zomwe siziyenera kuwala.

Zida zosiyanasiyana zimakhala ndi katundu wosiyana komanso ntchito zosiyanasiyana.Matumba onyamula zakudya wamba si chinthu chimodzi, koma ndi magulu angapo osanjikiza, omwe amatha kupangidwa ndi zigawo ziwiri, zigawo zitatu, zigawo zinayi, ndi zina.
Chakudya choumandizakudya zowumitsanthawi zambiri amapangidwa ndi PET/PE.
Mwachitsanzo,kuphika kwapamwambanthawi zambiri amapangidwa ndi nayiloni CPP, kapena zophatikizika zina.
Chophimba chofiira cha ham ndi chinthu chimodzi cha PVDC.
Maswiti ndi chokoletinthawi zambiri amagwiritsa ntchito mapepala owonekera / PP, pepala la kraft / PE / AL / PE, AL / PE, ndi zina.