Kodi mumadziwa bwanji za matumba opakira zakudya?

Pali mitundu yambiri yamatumba onyamula zakudya omwe amagwiritsidwa ntchito ponyamula zakudya, ndipo ali ndi machitidwe awoawo komanso mawonekedwe awo. Lero tikambirana zina zomwe zimagwiritsidwa ntchito nthawi zambiri za matumba onyamula zakudya kuti mufotokozere. Ndiye chikwama cholongedza chakudya ndi chiyani? Matumba oyika zakudya nthawi zambiri amatanthawuza mapulasitiki onga mapepala okhala ndi makulidwe osakwana 0.25 mm ngati mafilimu, ndipo zotengera zosinthika zopangidwa ndi makanema apulasitiki zimagwiritsidwa ntchito kwambiri m'makampani azakudya. Pali mitundu yosiyanasiyana ya matumba onyamula zakudya. Zimakhala zowonekera, zosinthika, zimakhala ndi madzi abwino, kukana chinyezi ndi zotchinga mpweya, mphamvu zamakina zabwino, katundu wokhazikika wamankhwala, kukana mafuta, zosavuta kusindikiza mokongola, ndipo zimatha kusindikizidwa kutentha m'matumba. Kuphatikiza apo, zotengera zomwe zimagwiritsidwa ntchito kwambiri pazakudya nthawi zambiri zimakhala ndi magawo awiri kapena kupitilira apo amafilimu osiyanasiyana, omwe amatha kugawidwa m'magulu akunja, apakati komanso amkati malinga ndi malo awo.

Kodi ndi zotani zomwe zimafunikira pakuseweredwa kwa gawo lililonse la makanema ophatikizika omwe amagwiritsidwa ntchito kwambiri? Choyamba, filimu yakunja nthawi zambiri imatha kusindikizidwa, yosayamba kukanda, komanso yosamva media. Zida zomwe zimagwiritsidwa ntchito nthawi zambiri zimaphatikizapo OPA, PET, OPP, ndi mafilimu okutidwa. Kanema wosanjikiza wapakati nthawi zambiri amakhala ndi ntchito monga chotchinga, shading yowala, komanso chitetezo chathupi. Zomwe zimagwiritsidwa ntchito nthawi zambiri zimaphatikizapo BOPA, PVDC, EVOH, PVA, PEN, MXD6, VMPET, AL, etc. Ndiye pali filimu yamkati, yomwe nthawi zambiri imakhala ndi ntchito zotchinga, kusindikiza, ndi anti-media. Zomwe zimagwiritsidwa ntchito nthawi zambiri ndi CPP, PE, etc. Kuphatikiza apo, zida zina zimakhala ndi mawonekedwe akunja ndi apakati. Mwachitsanzo, BOPA angagwiritsidwe ntchito ngati wosanjikiza kunja kwa kusindikiza, ndipo angagwiritsidwenso ntchito ngati wosanjikiza pakati kuchita mbali ina ya chotchinga ndi chitetezo thupi.

Zomwe zimagwiritsidwa ntchito nthawi zambiri zimakhala ndi mawonekedwe a filimu osinthika, nthawi zambiri, zinthu zakunja ziyenera kukhala ndi kukana, kukana kuphulika, chitetezo cha UV, kukana kuwala, kukana mafuta, kukana zinthu zakuthupi, kutentha ndi kuzizira, kukana kupsinjika, kusindikiza, kutentha kosasunthika, fungo lochepa, lochepa Lopanda fungo, lopanda poizoni, lonyezimira, lowoneka bwino, lamthunzi ndi mndandanda wa katundu; zinthu zapakati zosanjikiza ziyenera kukhala ndi kukana, kukana kukanikiza, kukana kuphulika, kukana chinyezi, kukana gasi, kusungitsa kununkhira, kukana kuwala, kukana mafuta, kukana kwazinthu za organic, kutentha ndi kuzizira, kukana kupsinjika, kulimba kwa mbali ziwiri, kukoma kochepa, fungo lochepa, lopanda poizoni, lowonekera, lopanda umboni ndi zina; ndiye zamkati wosanjikiza zakuthupi, kuwonjezera ena katundu wamba ndi wosanjikiza wakunja ndi wosanjikiza pakati, alinso ndi katundu wake wapadera, amene ayenera kukhala onunkhira posungira, otsika adsorption ndi katundu odana seepage. Kukula kwaposachedwa kwa matumba onyamula chakudya ndi motere:

1. Matumba oyikamo chakudya opangidwa ndi zinthu zoteteza chilengedwe.

2. Pofuna kuchepetsa ndalama komanso kusunga zinthu, matumba onyamula zakudya ayamba kuchepa.

3. Matumba onyamula zakudya akukula motsata ntchito zapadera. Zida zophatikizika kwambiri zotchinga zipitiliza kukulitsa msika. M'tsogolomu, mafilimu otchinga kwambiri omwe ali ndi ubwino wosavuta kukonza, mpweya wamphamvu ndi mpweya wamadzi, komanso moyo wabwino wa alumali udzakhala njira yosinthira zakudya m'masitolo akuluakulu m'tsogolomu.