Paper material for fluid containers having characteristics of calibrated fragility and rigidity and a barrier property
AssigneeGruppo Cordenons S.p.A.
InventorLuca Monacelli
Life of this patent
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Abstract
A paper material, including a base substrate having the following formulation: —a mixture of cellulose fibres, cotton fibres and synthetic fibres, between 50% and 80% by weight—at least one polymeric substance, between 1% and 10% by weight—at least one inorganic filler, between 10% and 50% by weight—at least one polyol and/or acrylic polymer and/or starch, between 1% and 10% by weight—aluminium salts, between 1% and 30% by weight; where the aluminium salts, the at least one polyol and/or acrylic polymer and/or starch being present in at least one surface of the paper material.
Claims19
A container for fluid material, including an outer shell made of paper material comprising a base substrate having the following formulation:
- a mixture of cellulose fibres, cotton fibres and synthetic fibres, between 50% and 80% by weight;
- at least one polymeric substance, between 1% and 10% by weight;
- at least one inorganic filler, between 10% and 50% by weight;
- at least one polyol and/or acrylic polymer and/or starch, between 1% and 10% by weight;
- aluminum salts, between 1% and 30% by weight;
- wherein said aluminum salts and said at least one polyol and/or acrylic polymer and/or starch is present in at least an outer surface of said outer shell.
A paper material, including a base substrate having the following formulation:
- a mixture of cellulose fibres, cotton fibres and synthetic fibres, between 50% and 80% by weight;
- at least one polymeric substance, between 1% and 10% by weight;
- at least one inorganic filler, between 10% and 50% by weight;
- at least one polyol and/or acrylic polymer and/or starch, between 1% and 10% by weight;
- aluminum salts, between 1% and 30% by weight;
- wherein said aluminum salts and said at least one polyol and/or acrylic polymer and/or starch is present in at least one surface of said paper material.
A paper material, including a base substrate having the following formulation:
- a mixture of cellulose fibres, cotton fibres and synthetic fibres, between 50% and 80% by weight, wherein the synthetic fibres comprise an aliphatic polyolefin and wherein in the mixture of fibres a content of cotton fibres and synthetic fibres is in proportion, varying between 1% and 10% by weight;
- at least one polymeric substance comprising one or more resins based on colophony, alkyl ketene dimer, acetylsuccinic acid, or epichlorohydrin carboxymethylcellulose, between 1% and 10% by weight;
- at least one inorganic filler, between 10% and 50% by weight;
- at least one polyol and/or acrylic polymer and/or starch, between 1% and 10% by weight;
- aluminum salts, between 1% and 30% by weight;
- wherein said aluminum salts and said at least one polyol and/or acrylic polymer and/or starch is present in at least one surface of said paper material.
Dependencies are inferred from the claim text.