High durability cardboard product and method for the manufacturing thereof

EP4281616B1Active Publication Date: 2024-12-18FIBERDOM OY
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Patent Information

Application Number
EP2022709338
Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-01-25
Filing Date
2022-01-24
Publication Date
2024-12-18
Estimated Expiration
2042-01-24

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Abstract

The object of the invention is high durability cardboard product and a method for the manufacturing thereof. The method comprises the steps of applying a cross-linking formulation comprising at least one cross-linking acid and at least one polyol to a pulp sheet material, pre-dry-ing the pulp sheet material treated with the cross-linking formulation and pre-heating a single sheet or combined multiple sheets of the pre-dried pulp sheet material treated with the cross-linking formulation. At least one cardboard product is shaped and cut out of the pre-heated pulp sheet material, and finally subjected to a final curing step.
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Citation Information

Patent Citations

  • Cross-linked pulp and method of making same

    CA2443901C

  • Composite material comprising bio-filler and specific polymer

    EP2697293A1

  • Paper fiber based products.

    NL2015319A

  • Polyesters of citric acid and sorbitol

    US3661955A

  • Method for manufacturing a dry-laid mat for thermoforming

    WO2019193504A1