Method and plant for producing a filling material and filling material

A method for producing a filling material comprising:

• feeding vegetable kapok fibre to a mixing chamber;
• separating elementary kapok filaments unbound from each other from the vegetable kapok fibre in said mixing chamber by directing jets and/or blades of a pressurized fluid against said vegetable kapok fibre;
• feeding goose and/or duck down to said mixing chamber;
• and
• incorporating elementary kapok filaments unbound from each other into flakes of goose and/or duck down by mixing said elementary kapok filaments and said goose and/or duck down in said mixing chamber by means of said jets and/or blades of pressurised fluid.

A filling material comprising goose and/or duck down and vegetable kapok fibres, comprising:

• a) hybrid goose and/or duck down comprising elementary kapok filaments unbound from each other incorporated in flakes of goose and/or duck down in an amount equal to or greater than 10% by weight of the total weight of kapok,
• and/or
• b1) goose and/or duck down, and
• b2) disentangled kapok fibres, made of clusters of elementary kapok filaments unbound from each other and not incorporated in the down flakes, and having a weight equal to or greater than 0.05 g, and in an amount equal to or lower than 20% by weight of the total weight of kapok.