FIELD: food industry.
SUBSTANCE: invention relates to packaging and thermal treatment of a food product in a packaging container (30) made of paper or cardboard. The packaging container (30) is first filled (wholly or partially) with foam containing a non-oxidising gas such as nitrogen; then the packaging container (30), filled wholly or partially, is filled with the corresponding food product. Whenever necessary, after filling the packaging container (30) is additionally filled with foam to guarantee that the free space over the product in the packaging container (30) is wholly filled with foam when the packaging container (30) is closed and heat-sealed. Then the sealed packaging container (30) filled with the food product and foam undergoes thermal treatment at a temperature no less than 115°C.
EFFECT: according top the invention concept, the method allows both solid and semi-solid fruit products together with a liquid food product to be packaged into a packaging container made of paper or cardboard and to undergo thermal treatment for storage life extension without the risk of the gas-containing medium inside the package being preserved integral during the whole of the product storage life.
6 cl, 4 dwg
