The magnesium-iron (Mg/Fe) flameless self-heater currently used in foods cannot achieve the expected thermal efficiency during the food shelf life as the storage time goes on. In this study, the Mg/Fe type self-heater was subject to the accelerated tests at 55 ℃, and the effects of three factors in the storage period on heating performance and food heating effects were studied, including packaging bag materials, existence of salt electrolyte and vacuum. The results showed that the heating performance of different series self-heaters and food heating effects was decreased with the extension of storage time. Water, oxygen and salt were the important factors in the occurrence of heat electrochemical reactions, keeping no salt and vacuum conditions contribute to help maintain heating performance and food heating effect in the storage period. Compared to PE bags, composite aluminum foil bag packaging had better barrier air and water vapor performance. With the same package and storage time, heat performance and food heating effect of four series of heaters of composite aluminum foil bags were higher than that of PE bag packaging. The results provide technical basis for the Mg/Fe type flameless food self-heater formulation, which helps to provide heating efficiency during the food shelf life.
MA Tianjiao
,
CUI Yan
,
WU Gang
,
QIU Kai
,
YU Mingfu
,
ZHANG Xiaojuan
,
LIU Jin
,
LI Jinjie
,
QIAN Ping
. Research on heating performance and its influencing factors of flameless food self-heater[J]. Food and Fermentation Industries, 2022
, 48(19)
: 178
-184
.
DOI: 10.13995/j.cnki.11-1802/ts.031247
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