Patent ID: 7779998

Claim:
An autoclave package containing a product therein and, comprising a fibre-based packaging material treated with a hydrophobic size and comprising on the inside and/or outside of the fibre substrate one or more layers for reduced water penetration, the package having been treated under pressure at a temperature of 100 to 250° C. for a time of 5 min to 30 h in water vapor, wherein the fibre substrate has been treated with a hydrophobic size, an aluminium compound and a wet-strength size for increased heat resistance of the packaging material, the hydrophobic size has been used in an amount of 0.5 to 3.0 kg/t of dry fiber substrate, the weight ratio of hydrophobic size to the aluminium compound is 1:0.5-1:5, and the layer for reduced water penetration of the packaging material comprises a polymer coating.