Isikhwama se-vacuumngaphezu kokuvimbela ukukhula nokukhiqizwa kwama-microorganisms, omunye umsebenzi obalulekile ukuvimbela i-oxidation yokudla, ngoba ukudla kwamafutha namafutha kuqukethe inani elikhulu lama-acids angenalutho, indima ye-oksijini kanye ne-oxidation, ukuze ukudla kunambitheke kabi, ukuwohloka, ngaphezu kwalokho, ukulahleka kwe-oxidation kavithamini A no-C, umbala wokudla endimeni yezinto ezingazinzile yi-oxygen, ukuze umbala ube mnyama.Ngakho-ke, ukukhishwa komoya-mpilo kungavimbela ngokuphumelelayo ukuwohloka kokudla futhi kugcine umbala, iphunga, ukunambitheka kanye nenani lokudla okunempilo.
Isikhwama se-vacuumukuvikela imikhiqizo ekungcolisweni kwemvelo kanye nokwelula isikhathi seshelufu sokudla nokunye okupakishwayo, kungathuthukisa inani kanye nekhwalithi yemikhiqizo.Ubuchwepheshe bokupakisha i-vacuum baqala ngawo-1940s.Kusukela ngo-1950, i-polyester, ifilimu yepulasitiki ye-polyethylene isetshenziswe ngempumelelo ekufakweni kwempahla,umshini wokupakisha we-vacuumithuthukiswe ngokushesha.
Emkhakheni wokuphila nomsebenzi wabantu, izikhwama ezihlukahlukene ze-vacuum zigcwele.Okungasindi, okuvaliwe, okusha, okunqanda ukugqwala, ukugqwala okungangenwa ukugqwala kukho konke ukudla kuya emithini, emikhiqizweni elukiweyo, kusukela ekukhiqizeni umkhiqizo onembayo kuya ezimbonini ezilungisa insimbi namalabhorethri neminye imikhakha eminingi.Ukusetshenziswa okwandayo kokufakwa kwe-vacuum kuye kwaqhuba ukuthuthukiswa kweimishini yokufaka i-vacuum, futhi ubeke izimfuneko eziphakeme kubo.
Isikhathi sokuthumela: Aug-12-2021