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US 2026/0184055 A1Published application
Multilayer deep-drawable packaging material
AssigneeFelix Schoeller GmbH & Co. KG
InventorAndreas FEHLKER
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AssigneeFelix Schoeller GmbH & Co. KG
InventorAndreas FEHLKER
Estimating the term…
The invention relates to a multilayer deep-drawable packaging material having an upper face and a lower face, comprising at least one first and one second paper layer and at least one polymer layer, wherein the at least one first and one second paper layer are connected to one another by the at least one polymer layer, wherein the at least one polymer layer contains at least one water-soluble thermoplastic polymer. The invention also relates to a method for producing a multilayer deep-drawable packaging material, comprising the following steps: (a) providing a first paper layer; (b) applying a polymer layer to the first paper layer; (c) connecting the first paper layer, with the polymer layer applied thereto, to a second paper layer such that the polymer layer is located between the first paper layer and the second paper layer; or (a′) providing a second paper layer; (b′) applying a polymer layer to the second paper layer; (c′) connecting the second paper layer, with the polymer layer applied thereto, to a first paper layer such that the polymer layer is located between the first paper layer and the second paper layer, wherein the polymer layer in step (b) contains at least one water-soluble and thermoplastic polymer. The invention also relates to the use of the multilayer deep-drawable packaging material according to the invention for producing packaging, in particular food packaging.
A multilayer deep-drawable packaging material having an upper face and a lower face, comprising at least one first and one second paper layer and at least one polymer layer, wherein the at least one first and one second paper layer are connected to one another by the at least one polymer layer, characterized in that the at least one polymer layer contains at least one water-soluble thermoplastic polymer.
The multilayer deep-drawable packaging material according to any of the preceding claims, characterized in that the at least one water-soluble thermoplastic polymer has, in the pH range from 3 to 11 and at 20±5° C. and 1013.25 hPa, a water solubility of at least 25% (m/m) polymer in water.
The multilayer deep-drawable packaging material according to any of the preceding claims, characterized in that the at least one water-soluble thermoplastic polymer has a modulus of elasticity of at least 0.8 GPa.
The multilayer deep-drawable packaging material according to any of the preceding claims, characterized in that the at least one water-soluble thermoplastic polymer is a biopolymer, in particular a biopolymer selected from modified and natural biopolymers.
The multilayer deep-drawable packaging material according to any of the preceding claims, characterized in that the packaging material has a recyclability of more than 13 scoring points, preferably more than 16 scoring points, determined in accordance with the method described in project number 530592 of the bifa Umweltinstitut with the project title “Recyclingfähigkeit von Verpackungen”.
The multilayer deep-drawable packaging material according to any of the preceding claims, characterized in that the proportion of paper in the packaging material is greater than 80 wt. %, preferably greater than 90 wt. %, particularly preferably greater than 95 wt. %, relative to the total weight of the packaging material.
The multilayer deep-drawable packaging material according to any of the preceding claims, characterized in that the oxygen permeation of the packaging material is not more than 15 cm3/m2 in 24 hours, measured according to DIN 53380-3 at a temperature of 23° C., 50% relative humidity and an air pressure of 1 atm.
The multilayer deep-drawable packaging material according to any of the preceding claims, characterized in that the water vapor permeation of the packaging material is not more than 50 g/m2 in 24 hours, measured according to EN ISO 15106-3 at a temperature of 23° C., 50% relative humidity and an air pressure of 1 atm.
A method for producing a multilayer deep-drawable packaging material, comprising the following steps:
Dependencies are inferred from the claim text.