Multilayer article comprising a biodegradable polymer-based layer and a cellulose-fiber based support; method of manufacturing multilayer article and food accessory comprising a multilayer article

1. A thermoformably shapeable multilayer article for a food product comprising:

(i) a non-woven fiber layer comprising at least 50% by weight of fibers formed of at least one biodegradable polymer which comprises polylactic acid (PLA) having a melting point which is below 220° C., a thickness between 75 and 150 micrometers and a weight between 10 and 30 g/m 2 ;

(ii) a cellulose-fiber based support layer which comprises a greaseproof paper; and

(iii) an adhesive layer comprised of a food-safe adhesive selected from the group consisting of acrylic adhesives, polyurethane adhesives and vinyl ethylene acetate, the adhesive layer adhesively joining the non-woven fiber layer to the cellulose fiber based support layer.

2. The multilayer article according to claim 1 , wherein the at least one biodegradable polymer further comprises a polymer which is selected from the group consisting of PHA (polyhydroxyalkanoate), PHB (poly(hydroxybutyrate)), PHB(V) (poly(hydroxybutyrate-co-hydroxyvalerate)), PBS (poly(butylenesuccinate)), biopolyesters and mixtures thereof.

3. The multilayer article according to claim 1 , wherein the cellulose-fiber based support comprises a laminated structure comprised of a kraft paper layer and a vegetable parchment layer.

4. The multilayer article according to claim 1 , wherein the non-woven layer of fibers comprises 50- 100% by weight of the at least one biodegradable polymer and a remaining portion of the non-woven layer of fibers comprises cellulosic fibers.

5. The multilayer article according to claim 1 , which further comprises a protective layer covering the non-woven layer of fibers comprising the at least one biodegradable polymer.

6. The multilayer article according to claim 1 , wherein the non-woven layer of fibers comprises 100% by weight of the at least one biodegradable polymer melting point of which is below 220° C.

7. The multilayer article according to claim 3 , wherein the vegetable parchment layer has a grammage of 40-45 g/m 2 and the kraft paper has a grammage of 40-15 g/m 2 .

8. The multilayer article according to claim 3 , wherein the cellulose-fiber based support has a siliconized side which is positioned next to the vegetable parchment layer.

9. The multilayer article according to claim 1 , wherein the non-woven fiber layer comprises a layer of thermally bound fibers.

10. The multilayer article according to claim 1 , wherein the adhesive is present in the adhesive layer in an amount between 3 and 5 g/m 2 relative to the surface of the multilayer article.

11. The multilayer article according to claim 1 , wherein the adhesive is present in the adhesive layer in an amount between 8 and 10 g/m 2 relative to the surface of the multilayer article.

12. The multilayer article according to claim 1 , wherein the cellulose-fiber based support comprises a paper having at least one side which is treated with silicone.

13. The multilayer article according to claim 1 , wherein the cellulose-fiber based support comprises a parchment layer.

14. The multilayer article according to claim 5 , which comprises a protective layer having a melting point which is over 220° C.

15. A multilayer article for a food product comprising:

(i) a non-woven fiber layer of thermally bound fibers comprising at least 50% by weight of fibers formed of at least one biodegradable polymer which comprises polylactic acid (PLA) having a melting point which is below 220° C. and having a thickness between 75 and 150 micrometers and weight between 10 and 30 g/m 2 ;

(ii) a cellulose-fiber based support layer which comprises a parchment paper; and

(iii) an adhesive layer comprised of an adhesive selected from the group consisting of acrylic adhesives, polyurethane adhesives and vinyl ethylene acetate, the adhesive layer adhesively joining the non-woven fiber layer to the cellulose fiber based support layer.

16. The multilayer article according to claim 15 , wherein the at least one biodegradable polymer further comprises a polymer which is selected from the group consisting of PHA (polyhydroxyalkanoate), PHB (poly(hydroxybutyrate)), PHB(V) (poly(hydroxybutyrate-co-hydroxyvalerate)), PBS (poly(butylenesuccinate)), biopolyesters and mixtures thereof.

17. The multilayer article according to claim 15 , wherein the cellulose-fiber based support comprises a laminated structure comprised of a kraft paper layer and a vegetable parchment layer.

18. The multilayer article according to claim 15 , wherein the non-woven layer of fibers comprises 50-100% by weight of the at least one biodegradable polymer and a remaining portion of the non-woven layer of fibers comprises cellulosic fibers.

19. The multilayer article according to claim 15 , which further comprises a protective layer covering the non-woven layer of fibers comprising the at least one biodegradable polymer.

20. The multilayer article according to claim 15 , wherein the non-woven layer of fibers comprises 100% by weight of the at least one biodegradable polymer melting point of which is below 220° C.

21. The multilayer article according to claim 17 , wherein the vegetable parchment layer has a grammage of 40-45 g/m 2 and the kraft paper has a grammage of 40-15 g/m 2 .

22. The multilayer article according to claim 17 , wherein the cellulose-fiber based support has a siliconized side which is positioned next to the vegetable parchment layer.

23. The multilayer article according to claim 15 , wherein the non-woven fiber layer comprises a layer of thermally bound fibers.

24. The multilayer article according to claim 15 , wherein the adhesive is present in the adhesive layer in an amount between 3 and 5 g/m 2 relative to the surface of the multilayer article.

25. The multilayer article according to claim 15 , wherein the adhesive is present in the adhesive layer in an amount between 8 and 10 g/m 2 relative to the surface of the multilayer article.

26. The multilayer article according to claim 15 , wherein the cellulose-fiber based support comprises a paper having at least one side which is treated with silicone.

27. The multilayer article according to claim 15 , wherein the cellulose-fiber based support comprises a parchment layer.

28. The multilayer article according to claim 19 , which comprises a protective layer having a melting point which is over 220° C.

29. A method of manufacturing the multilayer article for a food product according to claim 1 , comprising the following steps:

(a) applying the food-safe adhesive onto the cellulose-fiber based support comprising a grease proof paper;

(b) applying the non-woven layer onto the cellulose-fiber based support on a side of the applied adhesive; and

(c) drying of the resulting multilayer article.

30. A food accessory comprising the multilayer article according to claim 1 , the food accessory comprising a flat bottom and a rim arranged by turning an edge area forming an inside of the accessory.

31. The food accessory according to claim 30 , wherein the cellulose-fiber based support is arranged towards an inside of the food accessory.

32. A process for manufacturing the food accessory according to claim 30 , comprising the steps of arranging a piece of the multilayer article, shaping the multilayer article and folding the edges of the multilayer article.

33. The process according to claim 32 , wherein the process further comprises a step of heating the article after the step of shaping such that during the heating the at least one biodegradable polymer in the non-woven layer of fibers melts and adheres to surfaces in contact therewith.