Cellulosic textile fibre
AssigneeInfinited Fiber Company Oy
InventorsErkki Malanin, Sakari Siren, Markus Nuopponen, Elias Veijola
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Abstract
According to an example aspect of the present invention, there is provided a manmade cellulosic textile fibre having a linear density of 0.8-1.8 dtex, a tenacity of 2.0-2.9 cN/dtex, and an initial modulus of 50-120 cN/dtex. The cellulosic textile fibre comprises a cellulose-based material, wherein at least 50 wt-% of the raw material of the textile fibre is cellulose-containing waste, and at least 50 wt-% of the cellulose-containing waste is textile waste.
Claims22
A manmade cellulosic textile fibre having
- a linear density of 0.8-1.8 dtex, measured according to ISO 1973:2021;
- a tenacity of 2.0-2.9 cN/dtex, measured according to ISO 5079:2020;
- and
- an initial modulus of 50-120 cN/dtex, measured according to ISO 5079:2020;
- wherein at least 50 wt-% of the raw material of the textile fibre is cellulose-containing waste, and at least 50 wt-% of the cellulose-containing waste is textile waste.
A method for the manufacture of cellulosic textile fibre, comprising the steps of:
- pre-treating cellulose-based material comprising at least 50 wt-% of cellulose-containing waste, wherein at least 50 wt-% of the cellulose-containing waste is textile waste to form a pre-treated cellulose-based material;
- performing cellulose carbamation on the pre-treated cellulose-based material to form cellulose carbamate;
- dissolving the cellulose carbamate in an aqueous alkaline medium to form a cellulose carbamate dope;
- spinning the cellulose carbamate dope in an aqueous spinning medium to form filaments or filament tow, while subjecting the filament or filament tow to stretching by at least 70% by length, when temperature of stretching bath is 75-100° C.;
- to obtain cellulose carbamate fibres having a linear density of 0.8-1.8 dtex, measured according to ISO 1973:2021;
- a tenacity of 2.0-2.9 cN/dtex, measured according to ISO 5079:2020;
- and an initial modulus of 50-120 cN/dtex, measured according to ISO 5079:2020.
(canceled)
Dependencies are inferred from the claim text.