Zaka zoposa 20 zapitazo tinatsuka mosamala matumba a cellophane, tinawatsitsa pa khonde, kuti tiwagwiritse ntchito mobwerezabwereza kusungirako mankhwala. Koma Stone Age ili kumbuyo kwathu, chifukwa tsopano pali filimu yotambasula chakudya, yomwe mungathe kusunga mwatsopano za mankhwala ndi mauthenga awo kwa nthawi yaitali, patsiku la tsiku ndi tsiku ndi malonda.
Masiku ano, kutambasula filimu imagwiritsidwa ntchito pazinthu zosiyana - kukanyamula katundu kuntchito, chifukwa chonyamulira katundu pamene akugulitsidwa mu malonda ogulitsira, komanso, pakhomo, pamene pali kusowa koletsa mpweya kuntchito kuti asatenge fungo la firiji kapena mosiyana , sanamupatse iwo.
Pali mitundu iwiri ya filimu ya chakudya - PVC ndi PE. Tiyeni tiwone zomwe iwo ali nazo ndi zomwe angasankhe kuti azigwiritsa ntchito kunyumba, chifukwa ali ndi mitengo yosiyana.
PVC ikutambasula filimu
Chidule cha PHV chimaimira mwachidule - ndi polyvinyl chloride. Gwiritsani ntchito mfundoyi kuti muyanjane ndi chakudya, chifukwa sizingatheke kwa anthu, ngati zigwiritsidwa ntchito molondola.
Chinthu chachikulu cha PVC filimuyi ndi chakuti imakhala ndi maonekedwe abwino, osaoneka ndi maso, omwe amalola chinyontho ndi mpweya kutuluka. Malowa ndi ofunika kulikonse kumene chakudya chamatenthechi chimayikidwa mu filimu, monga mu bakoloni.
Mkate wofunda ukhoza kusindikizidwa mufilimu popanda kuyembekezera kutentha kwathunthu. Pa nthawi ya phukusi, maonekedwe a mkati mwa filimuyi, yomwe imatulukamo pang'onopang'ono, mankhwalawa amawoneka okongola kwambiri ndipo amagulitsidwa kugulitsidwa ku unyolo wamalonda. Pogwiritsa ntchito mafilimu ambiri, pulogalamuyi imagwiritsidwa ntchito. Ichi ndi chanja chogwira ntchito bwino, chomwe ntchito ikufulumira, ndipo phukusi limakhala lolondola kwambiri.
Popeza mtengo wa zinthu zoterezi ndi wokwanira, umagwiritsidwa ntchito kwambiri mu mafakitale, koma pogwiritsira ntchito pakhomo, kugula katundu wotsika mtengo kumagulidwa, komanso kulibe katundu wochepa.
Tambani kanema kuchokera ku polyethylene
Kwa nyumba imene timagula filimu yotsika mtengo ya polyethylene
Tsopano palibe chifukwa chosankhira mosamala mbale kuti musunge chakudya mu firiji kapena kukakaka ubongo wawo, chifukwa ndi bwino kunyamula zakudya, monga kupuma. Mothandizidwa ndi filimu yotambasula, mumatha kutulutsa mankhwala aliwonse ndipo musadandaule za chitetezo chake.