Method for manufacturing a paperboard cup coated with biodegradable varnish and cup manufactured according to the method
AssigneeC.E.E. Compagnie Europeenne Des Emballages Robert Schisler
InventorsThierry Sallot, Claire Schisler
Life of this patent
Estimating the term…
Abstract
A method is proposed for manufacturing a cup intended for containing a food beverage. The method includes cutting out at least one sheet of coated paperboard to form a side wall and a bottom and joining the sheets thus cut out by heat-sealing to form the cup. The at least one paperboard sheet is coated on at least the interior side of the cup with a biodegradable varnish according to a coating/spreading technique. In this way, the cup is easy to manufacture, and complies with environmental standards in being easy to recycle and compost, even at home. Thus, the biodegradable varnish does not disturb or pollute the operation of the pulper used in the paper industry.
Claims10
A method for manufacturing a biodegradable and home compostable cup intended for containing a food beverage, comprising:
- cutting out at least one sheet of coated paperboard to form a side wall and a bottom;
- and
- joining the at least one sheet thus cut out by heat-sealing to form the cup, wherein said at least one sheet is coated on at least an interior side of the cup with a biodegradable and home compostable varnish according to a water solution coating/spreading technique, the water solution coating/spreading technique comprising the following steps:
- applying the at least one sheet against at least one coating applicator cylinder, each of said at least one coating applicator cylinder plunging into a tub containing said varnish forming at least one coated sheet, said biodegradable and home compostable varnish having heat-sealing capacities to weld the at least one sheet thus cut out,
- followed by passing the thus at least one coated sheet in front of an air knife generator to ensure a uniform thickness of the varnish throughout a surface of the paperboard, and
- followed by drying the thus at least one coated sheet in front of a drying station, wherein the biodegradable and home compostable varnish has a deposit of dry extract of 8 to 16 grams per m2 on the paperboard face on the interior side of the cup.
Dependencies are inferred from the claim text.