Multi-ply paperboard prepared from recycled materials and methods of manufacturing same

This invention, in one aspect, relates to a multi-ply paperboard having at least three inner plies and, in some aspects, a top liner and a back liner, wherein the multi-ply paperboard is derived from fiber sources comprising at least about 80% by weight recycled fiber. The multi-ply paperboard of the present invention exhibits strength characteristics comparable those of paperboard prepared from virgin board. In further aspects, the invention relates to methods of making the multi-ply paperboard of the present invention.

Esta invenção, em um aspecto, relaciona-se a um paperboard multi-ply que tem ao menos três dobras internas e, em alguns aspectos, um forro superior e um forro traseiro, wherein o paperboard multi-ply é derivado das fontes da fibra que compreendem ao menos aproximadamente 80% pela fibra recycled peso. O paperboard multi-ply da invenção atual exibe as características da força comparáveis aqueles do paperboard preparado da placa virgem. Em uns aspectos mais adicionais, a invenção relaciona-se aos métodos de fazer o paperboard multi-ply da invenção atual.