Vacuum sealing method is to exhaust the exhaust sealing method in a vacuum environment, carried out in a vacuum sealing machine.
(A) the use of a vacuum pump vacuum sealing machine sealing the first indoor air out, establish a certain degree of vacuum (typically 46.0 ~ 73.0kPa), pre-sealed cans at room temperature or high temperature vacuum sealing sealing exhaust law by sealing valve into the already established a certain degree of vacuum sealed interior, part of the air tank was immediately withdrawn, and immediately sealing, and then sent through another valve seal.
(2) the application of vacuum sealing vacuum exhaust vent method in the production of meat, such as luncheon meat, canned fish, fish oil, anchovies and other similar solid loading canned food has been widely used.
(3) the degree of vacuum sealing should pay attention to the problem of the vacuum chamber can be adjusted according to the desired degree of vacuum canned final requirements and temperature inside the tank contents. After vacuum sealing, tank vacuum of typically 33.3 ~ 40.0kPa, may not exceed 53.0 ~ 73.0kPa. The size of the tip clearance value is extremely important when vacuum sealing.
(4) the main factors affecting the degree of vacuum tank vacuum sealing
① When the vacuum sealing, the vacuum degree of the vacuum chamber is sealed and the food temperature is a major factor in controlling the degree of vacuum inside the tank.
② When vacuum sealing, the canned headspace vapor partial pressure must not exceed the vacuum seal indoor residual gas pressure.
③ high degree of vacuum absorption of food needs supplemental heating.
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