| 摘要 |
PURPOSE:To sterilize a packed food under ordinary pressure, by filling a food in a bag having partially a vent part, primarily heating the bag in a support transmitting microwaves to seal the bag, and secondarily heating the bag by irradiation with microwaves while reversing. CONSTITUTION:A food with >=20% moisture content is filled in a food packing material, transmitting microwaves, and having the inner surface with heat sealability to leave a vent part, and the packing material is then contained in a support made of a material transmitting microwaves, and in the obliquely placed state transferred to the first heating 11 by a conveyor. The packing material is then reversed while heated to 100-105 deg.C by microwaves, pressurized high-temperature steam or both together, passed through a holding part 12 and deaerated. The vent part of the resultant packed food is sealed up, reversed while heated to >=125 deg.C by irradiation with microwaves in the second heating part 13, passed through a holding part 14 and cooled in a cooling part 15. |
