Process for improving weavability of a yarn
AssigneeCanepa S.P.A.
InventorsAlfonso Saibene, Carlotta Saibene
Life of this patent
Estimating the term…
Abstract
A process for improving weavability of a yarn is described. The process has a step of application of a chitosan-containing reinforcement product and a later chitosan crosslinking step.
Claims27
A process for improving weavability of a yarn made from natural animal fibers, vegetable fibers, man made synthetic polymer fibers and/or man made artificial polymer fibers, used at pure state or blended together, comprising the steps of:
- providing a yarn made of natural animal fibers, vegetable fibers, man made synthetic polymer fibers and/or man made artificial polymer fibers, used at pure state or blended together;
- preparing a sizing solution comprising a composition of chitosan and/or derivatives thereof as a reinforcement product;
- and
- sizing said yarn with said sizing solution to apply said reinforcement product to the fibers of said yarn by at least partial impregnation and/or coating, to increase weavability of said yarn for later weaving as a weft and/or warp yarn or for knitting,
- wherein said sizing step is followed by crosslinking of the chitosan of said reinforcement product applied to the fibers of said yarn after sizing, such that a crosslinked reinforcement polymer is obtained from said chitosan, which is adapted to be permanently anchored to the fibers of said yarn, and comprises a desizing step, providing partial and calibrated removal of said crosslinked chitosan-derived reinforcement product anchored to the fibers of said yarn, from such fibers of said yarn.
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-8. (canceled)
A process for making a fabric or a knit with yarns made from natural animal fibers, vegetable fibers, man made synthetic polymer fibers and/or man made artificial polymer fibers, used at pure state or blended together, comprising a step of warp-and-weft weaving of said yarns or a step of knitting of said yarns, wherein at least one or both of the warp and weft yarns, preferably the warp yarn only, used in this weaving step or a yarn used in said knitting step, is a yarn obtained by a process for improving weavability of a yarn, comprising the steps of:
- providing a yarn made of natural animal fibers, vegetable fibers, man made synthetic polymer fibers and/or man made artificial polymer fibers, used at pure state or blended together;
- preparing a sizing solution comprising a composition of chitosan and/or derivatives thereof as a reinforcement product;
- and
- sizing said yarn with said sizing solution to apply said reinforcement product to the fibers of said yarn by at least partial impregnation and/or coating, to increase weavability of said yarn for later weaving as a weft and/or warp yarn or for knitting,
- wherein the process comprises a desizing step, providing partial and calibrated removal of said crosslinked chitosan-derived reinforcement product anchored to the fibers of said yarn, from such fibers of said yarn, said desizing step being carried out after said weaving step or after said knitting step.
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-17. (canceled)
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A process for improving affinity to finishing of a finished fabric, knit or garment, comprising at least one yarn made from natural animal fibers, vegetable fibers, man made synthetic polymer fibers and/or man made artificial polymer fibers, used at pure state or blended together, comprising the steps of:
- providing a finished fabric, knit or garment comprising at least one yarn made of natural animal fibers, vegetable fibers, man made synthetic polymer fibers and/or man made artificial polymer fibers, used at pure state or blended together;
- preparing a sizing solution comprising a composition of chitosan and/or derivatives thereof;
- sizing said finished fabric, knit or garment with said sizing solution to apply said chitosan composition to the fibers of said at least one yarn by at least partial impregnation and/or coating;
- after said sizing step, crosslinking the chitosan of said chitosan composition to obtain a crosslinked polymer from said chitosan, which is permanently anchored to the fibers of said at least one yarn, and
- after said step of crosslinking the chitosan of said chitosan composition, proceeding to a desizing step with partial and calibrated removal of said crosslinked chitosan-derived polymer from the fibers of said at least one yarn.
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-29. (canceled)
Dependencies are inferred from the claim text.