Process for preparing a broken-up, cellulose-containing, starting material with a predefined fibre-length distribution

A method of providing a treated cellulose-comprising starting material for forming a regenerated, cellulosic molded body, wherein the method comprises:

• supplying a cellulose-comprising starting material which comprises cellulosic fibers;
• wherein the cellulose-comprising starting material entirely or partially comprises remains from a reusable clothing manufacture or reusable old clothes;
• and
• treating the cellulose-comprising starting material, to obtain the treated cellulose-comprising starting material, such that the cellulose fibers of the treated cellulose-comprising starting material comprise a predetermined fiber length distribution;
• wherein the predetermined fiber length distribution comprises an average length-weighted fiber length in the range 0.75 to 2.5 mm;
• and
• wherein the predetermined fiber length distribution comprises an amount of 17.5% or less of fibers with a length in the range 2 to 3.5 mm.

A method of providing a treated cellulose-comprising starting material for forming a regenerated, cellulosic molded body, wherein the method comprises:

• supplying a cellulose-comprising starting material which comprises cellulosic fibers;
• wherein the cellulose-comprising starting material entirely or partially comprises remains from a reusable clothing manufacture or reusable old clothes;
• and
• treating the cellulose-comprising starting material, to obtain the treated cellulose-comprising starting material, such that the cellulose fibers of the treated cellulose-comprising starting material comprise a predetermined fiber length distribution;
• wherein the predetermined fiber length distribution comprises an average length-weighted fiber length in the range 0.75 to 2.5 mm;
• and
• wherein the predetermined fiber length distribution comprises an amount of 12.5% or less of fibers with a length of more than 3.5 mm.

A method of manufacturing a regenerated, cellulosic molded body, the method comprising:

• providing a treated cellulose-comprising starting material by:
• supplying a cellulose-comprising starting material which comprises cellulosic fibers;
• wherein the cellulose-comprising starting material entirely or partially comprises remains from a reusable clothing manufacture or reusable old clothes;
• and
• treating the cellulose-comprising starting material, to obtain the treated cellulose-comprising starting material, such that the cellulose fibers of the treated cellulose-comprising starting material comprise a predetermined fiber length distribution;
• wherein the predetermined fiber length distribution comprises an average length-weighted fiber length in the range 0.75 to 2.5 mm;
• and
• wherein the predetermined fiber length distribution comprises an amount of 11% or less of fibers with a length of less than 0.2 mm.;
• and
• forming the regenerated cellulosic molded body from the treated cellulose-comprising starting material.