Recyclable 3d shaped product from an air-laid blank
AssigneeStora Enso OYJ
InventorMaria Törnblom
Life of this patent
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Abstract
A 3D shaped product (20) is formed by hot pressing of an air-laid blank (10) comprising natural fibers at a concentration of at least 70% by weight of the air-laid blank and a thermoplastic polymer binder at a concentration selected within an interval of from 2.5 up to 30% by weight of the air-laid blank. The 3D shaped product (20) is recyclable in a repulping process. At least a part of the thermoplastic polymer binder is water soluble at a repulping temperature of the repulping process. The 3D shaped product (20) are environmentally friendly alternatives to plastic 3D shaped products made by foamed polymers and can be recycled in existing recycling schemes.
Claims31
A three-dimensional (3D) shaped product, wherein
- the 3D shaped product is formed by hot pressing of an air-laid blank comprising natural fibers at a concentration of at least 70% by weight of the air-laid blank and a thermoplastic polymer binder at a concentration selected within an interval of from 2.5 up to 30% by weight of the air-laid blank;
- wherein the 3D shaped product is recyclable in a repulping process;
- and
- at least a part of the thermoplastic polymer binder is water soluble at a repulping temperature of the repulping process.
An air-laid blank configured for hot pressing into a three-dimensional (3D) shaped product, the air-laid blank comprising:
- natural fibers at a concentration of at least 70% by weight of the air-laid blank;
- and
- a thermoplastic polymer binder at a concentration selected within an interval of from 2.5 up to 30% by weight of the air-laid blank, wherein
- the air-laid blank is recyclable in a repulping process;
- and
- at least a part of the thermoplastic polymer binder is water soluble at a repulping temperature of the repulping process.
Dependencies are inferred from the claim text.