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1. WO2020115667 - A MOULDABLE FIBROUS SHEET AND A PRODUCTION METHOD THEREOF

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[ EN ]

CLAIMS

1. A web of fibrous cellulosic material derived from wood pulp, said web being suitable for three-dimensional moulding to form a packaging product, wherein the web comprises >40wt% of soft wood chemical pulp and at least one strength enhancement agent, wherein the web has a grammage less than 400g/m2, and wherein the cellulose fibers of said soft wood chemical pulp comprises a fiber curl of >9%.

2. The web according to claim 1 , comprising a density between 600 -875 kg/m3

3. The web according to claim 1 or 2, further comprising 0.3-10% by weight of m icrof ibri I lated cellulose, preferably 0.3-5% by weight based on the total fiber weight of the web.

4. The web according to claim 1 , 2 or 3, wherein said strength enhancement agent is a natural binder agent in the form of starch, at an amount of 5-75kg/tn, preferably in the range of 10-75 kg/tn or in the range of 12-75 kg/tn.

5. The web according to claim 4, wherein said starch is selected from the group comprising native starch, cooked starch, cationic starch, native chemically modified starch, physically modified polymer grafted starch, enzyme modified starch, anionic starch, amphoteric starch, crosslinked starch, pre-gelled starch and swelled starch.

6. The web according to any one of claims 1 -5, wherein said web has been subjected to hydrofobic sizing.

7. The web according to any one of claims 1 -6, comprising a geometrical mean tensile strength index of >50Nm/g.

8. The web according to any one of claims 1 -7, having a geometrical mean stretch, referring to the percentage elongation of the web before rupture, of >4% as measured by means of standard tensile test ISO 1924-2 with a span length of 20 mm and a test speed of 2 mm/minute.

9. The web according to any one of claims 1 -8, having a stretch, referring to the percentage elongation of the web before rupture, in the cross direction (CD), of >6.5%, preferably >7.5%, and more preferably >8.5% as measured by means of standard tensile test ISO 1924-2 with a span length of 20 mm and a test speed of 2 mm/minute.

10. A multiply laminate material comprising at least two layers whereof one layer is a web according to any one of claims 1 -9.

11. The multiply laminate material according to claim 10, further comprising at least one barrier layer, such as a film layer forming a barrier against liquid, gas, aroma, or grease, oil and/or fat.

12. A method for producing a molded, three-dimensional fiber-based product, comprising at least the steps of:

providing a fibrous cellulosic web material according to any one of claims 1 -11 ;

providing a forming tool with at least one three-dimensional mold; and using the forming tool for forming a three-dimensional product out of the fiber-based material.

13. A method according to claim 12, wherein said forming is any one of vacuum forming, thermoforming, cold forming, pressing or hydroforming.

14. A three-dimensional, fiber-based product obtainable by means of a method according to claim 12 or 13.

15. A three-dimensional, fiber-based product according to claim 14, comprising a laminate with multiple layers whereof at least one layer is made of the web of fibrous cellulosic material according to any one of claims 1 -8.

16. Use of a web of fibrous cellulosic material comprising >40wt% of soft wood chemical pulp and at least one strength enhancement agent, wherein the web has a grammage less than 400g/m2, and wherein the cellulose fibers of the soft wood chemical pulp comprise a fiber curl of >9%, for three-dimensional forming of a packaging product.