摘要 |
<p>The invention relates to a coated food paperboard (1), to the manufacturing process and use of the same, and to products obtained thereof. The paperboard (1) comprises one or several fibre material layers (2), such as a three-layer structure consisting of a middle layer (4) of a mixture of sulphate pulp and CTMP and of sulphate pulp layers (5) on both sides of it, and a polymeric coating (3) getting into contact with food, either on one side or on both sides of the paperboard. According to the invention, the coating (3) consists of an outer layer (6), the melting point of the polymer used in which is at least 230 DEG C, and of an inner layer (7) placed against the fibre material layer (5); in this inner layer, a polymer with a melting point of at least 230 DEG C is blended with another adhesive polymer, the melting point of which is 130-185 DEG C. Further, the inner layer (7) may be provided with mineral substance, such as calcium carbonate. In accordance with the invention, the paperboard (1) is manufactured by coextrusion of superimposed polymeric layers (6, 7). The paperboard (1) of the invention is suitable for liquid packaging or oven board, and products manufactured of the paperboard comprise especially oven dishes and consumer packages for food, which include the disch and which may be heated as such.</p> |
申请人 |
STORA ENSO OYJ;AHO, YRJOE;PENTTINEN, TAPANI;SALMINEN, RISTO;FOSTER, BRUCE |
发明人 |
AHO, YRJOE;PENTTINEN, TAPANI;SALMINEN, RISTO;FOSTER, BRUCE |