Plastic cans in full bloom acidic and high acid foods, […]
Plastic cans in full bloom acidic and high acid foods, may make the inner wall of the plastic tank has completely and uniformly dissolved tin appearance, mainly by small feather tin grains. During this period, the residual oxygen contents in plastic tank corrosion oxidation and tank wall as the oxidant has spent the end of.
In order to avoid the phenomenon of plastic tank bulging, in particular, there are several ways to deal with it.
First, as far as possible to remove the air in the plastic tank, the oxygen in the tank is reduced to the lowest level, so that the tank has a higher vacuum.
Two, properly adjust the acidity of low acid fruit to lower the pH to less than 4.
Three. To prevent the coating film from damaging the coating when the plastic tank is made, the method of spraying and filling is adopted when necessary.