A coating and pressware forming system comprising a coating system and a pressware forming system in-line with the coating system. The coating system includes a supply roll carrier and rollers configured for guiding and unwinding the paperboard material from a spool such that the paper traverses a path to the pressware forming system. The coating system also includes a waterfall dispenser fixed above the path the paper traverses for evenly applying liquid coating to the paperboard material. The waterfall dispenser includes a pressure chamber fluidly coupled with the source of liquid coating and having a gap through which the liquid coating is forced to flow evenly across a width of the paperboard material. The coating system may also include air nozzles for drying the coating on the paperboard material. Following this drying, the coating system may guide the coated paperboard material directly to the pressware forming system.

A method of manufacture of a coated material is provided. A polyvinyl alcohol polymer, where the polyvinyl alcohol polymer has a degree of hydrolysis of 90% or greater and a melting point in the range of 180 C. to 225 C. is melted on a cellulosic substrate and extruded to form a molten polyvinyl alcohol polymeric film which is then applied directly to the surface of the substrate to form the coated material.

A method of manufacture of a coated material is provided. A polyvinyl alcohol polymer, where the polyvinyl alcohol polymer has a degree of hydrolysis of 90% or greater and a melting point in the range of 180 C. to 225 C. is melted on a cellulosic substrate and extruded to form a molten polyvinyl alcohol polymeric film which is then applied directly to the surface of the substrate to form the coated material.

The present invention relates to paper or paperboard comprising cellulose fibers, said paper or paperboard comprising at least one coating layer formed by extrusion coating of a PP (polypropylene) resin, characterized in that the PP resin comprises at least 50% by weight of a branched PP copolymer having a density in the range of 890-910 kg/m.sup.3 (as determined according to ISO 1183), a melting temperature in the range of 155-170 C. (as determined according to ISO 11357-3), and a melt flow rate (230 C./2.16 kg) in the range of 10-15 g/10 min (as determined according to ISO 1133), and wherein the PP resin is applied to the paper or paperboard at a grammage of less than 30 g/m.sup.2.

The present invention relates to paper or paperboard comprising cellulose fibers, said paper or paperboard comprising at least one coating layer formed by extrusion coating of a PP (polypropylene) resin, characterized in that the PP resin comprises at least 50% by weight of a branched PP copolymer having a density in the range of 890-910 kg/m.sup.3 (as determined according to ISO 1183), a melting temperature in the range of 155-170 C. (as determined according to ISO 11357-3), and a melt flow rate (230 C./2.16 kg) in the range of 10-15 g/10 min (as determined according to ISO 1133), and wherein the PP resin is applied to the paper or paperboard at a grammage of less than 30 g/m.sup.2.

The present invention relates to a biodegradable polymer blend based on a biodegradable aliphatic aromatic polyester and/or aliphatic polyester comprising: The blend comprises10 to 80% by weight, based on the total weight of polyester a), polymer b) and polycaprolactone c), of at least one biodegradable polyester a) selected from the group consisting of aliphatic-aromatic polyesters, aliphatic polyesters, which are different from polymers b) and c), and mixtures thereof;18 to 88% by weight, based on the total weight of polyester a), polymer b) and polycaprolactone c), of at least one polymer b), selected from the group consisting of polyhydroxyalkanoates, polylactides, polyglycolic acid and mixtures thereof;2 to 72% by weight, based on the total weight of polyester a), polymer b) and polycaprolactone c), of at least one polycaprolactone c) having a viscosity number of at least 110 ml/g, in particular at least 150 ml/g, preferably at least 200 ml/g, especially at least 250 ml/g, as determined according to DIN 53728-3:1985-1; wherein the total weight of polyester a), polymer b) and polycaprolactone c) is at least 50% by weight, based on the total weight of the blend. The present invention relates to the use of the blend for coating substrates or for producing a rigid packaging article, to a mono-layered or multi-layered film comprising at least one layer comprising a biodegradable polymer blend, as defined hereinafter and to a process for coating a substrate layer. The present invention also relates to a laminate comprising at least one mono-layered or multi-layered film comprising at least one layer comprising a biodegradable polymer blend, as defined hereinafter, and to packaging materials.

The present invention relates to a biodegradable polymer blend based on a biodegradable aliphatic aromatic polyester and/or aliphatic polyester comprising: The blend comprises10 to 80% by weight, based on the total weight of polyester a), polymer b) and polycaprolactone c), of at least one biodegradable polyester a) selected from the group consisting of aliphatic-aromatic polyesters, aliphatic polyesters, which are different from polymers b) and c), and mixtures thereof;18 to 88% by weight, based on the total weight of polyester a), polymer b) and polycaprolactone c), of at least one polymer b), selected from the group consisting of polyhydroxyalkanoates, polylactides, polyglycolic acid and mixtures thereof;2 to 72% by weight, based on the total weight of polyester a), polymer b) and polycaprolactone c), of at least one polycaprolactone c) having a viscosity number of at least 110 ml/g, in particular at least 150 ml/g, preferably at least 200 ml/g, especially at least 250 ml/g, as determined according to DIN 53728-3:1985-1; wherein the total weight of polyester a), polymer b) and polycaprolactone c) is at least 50% by weight, based on the total weight of the blend. The present invention relates to the use of the blend for coating substrates or for producing a rigid packaging article, to a mono-layered or multi-layered film comprising at least one layer comprising a biodegradable polymer blend, as defined hereinafter and to a process for coating a substrate layer. The present invention also relates to a laminate comprising at least one mono-layered or multi-layered film comprising at least one layer comprising a biodegradable polymer blend, as defined hereinafter, and to packaging materials.