EP3696315B1 - Verfahren zum optischen aufhellen von textilprodukten aus tierischen fasern und nach diesem verfahren behandelte textilprodukte - Google Patents

Verfahren zum optischen aufhellen von textilprodukten aus tierischen fasern und nach diesem verfahren behandelte textilprodukte Download PDF

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Publication number
EP3696315B1
EP3696315B1 EP20155094.4A EP20155094A EP3696315B1 EP 3696315 B1 EP3696315 B1 EP 3696315B1 EP 20155094 A EP20155094 A EP 20155094A EP 3696315 B1 EP3696315 B1 EP 3696315B1
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Prior art keywords
bath
product
treatment
fibres
textile product
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EP20155094.4A
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English (en)
French (fr)
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EP3696315A1 (de
Inventor
Jacopo Geraldini
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/60—Optical bleaching or brightening
    • D06L4/614—Optical bleaching or brightening in aqueous solvents
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/30—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using reducing agents

Definitions

  • the present invention relates to a process for bleaching into optical white tone a textile product formed from fibres of animal origin, pure or mixed between them.
  • fibres for example, of cashmere, wool, alpaca, vicu ⁇ a, silk and the like.
  • textile product to be treated within the scope of the present invention, it is meant both the raw material, composed of fibres prepared for the spinning, called “TOPS" and the yarns obtained with the aforementioned fibres, as well as the fabrics obtained from the yarns.
  • TOPS raw material, composed of fibres prepared for the spinning
  • the process according to the invention is intended for the treatment of yarns of animal origin, as specified above, in the form of extra-fine combed yarns with a count comprised between Dtex 200 (50,000 Nm) and Dtex 55 (180,000 Nm).
  • the process finds application in the treatment, to obtain the optical white tone, of textile products, obtained with the aforementioned fibres contained in the yarns for the indicated counts, ready to be manufactured into garments.
  • the tone called "optical white” is a colour with high brightness without tint, which reflects all the light it receives, the degree of which is measurable by means of a conventional spectrophotometric reading.
  • the obtainment of the "optical white” tone in the sector of fibres of animal origin provides for a preliminary bleaching treatment through the use of conventional chemical bleaching substances, which is followed by a second treatment in a bath containing brightening substances, also called optical brighteners, and stabilizing substances, acting as a catalyst, which allow the optical brighteners to interact with the fibres to achieve the desired "optical white” tone.
  • CN103243543 discloses a decolouration method of coloured cashmere loose fibre, which comprises the following different steps of: degreasing, performing oxidation bleaching, flushing with deionized water, performing reduction and oxidation, performing oxygen washing, drying.
  • EP1199398 regards a method for wool whitening and garment washing employing a first reducing agent, preferably a borohydride material, and a second reducing agent, preferably a bisulfite material.
  • a first reducing agent preferably a borohydride material
  • a second reducing agent preferably a bisulfite material.
  • a further drawback, presented by this known technique comprising a preliminary bleaching and a subsequent treatment, in a different bath with brightening substance, consists in the fact that it is not in any case applicable to extra-fine combed yarns (from Dtex 200 (50,000 Nm) to Dtex 55 (180,000 Nm)).
  • the object of the present invention is therefore to provide a process for obtaining the so-called “optical white” with a single treatment, on fibres ready for spinning, known with the term "TOPS", of animal origin, or on extra-fine combed yarns, obtained from these fibres, or, again, on woven products made with the aforementioned type and nature of yarns, without conventional whitening treatments being carried out on these products which, by weakening their resistance, would compromise their use in manufacturing garments.
  • TOPS of animal origin
  • a further object is to safeguard the softness of the hand, such as to remain exactly the same as that of a product not subjected to the process of the present invention.
  • not least object is to present a highly ecological treatment with a reduction in the quantities to be disposed of the chemicals used.
  • a quantity of 10 kg of cashmere fibres prepared for spinning (TOPS) were placed in a treatment container, for bleaching into optical white tone, in which there was a bath consisting of 150 litres of water to which 750 grams of 90% hydrosulphite (ALBITE F), a solvent for the elimination of fatty substances from animal fibres (GP BIOWASH) in the measure of 150 g and a quantity of brightening product (UVITEX BHT) equal to 200 grams were added.
  • the bath temperature was maintained at a temperature of 60 ° C and the pH at about 7, i.e. at a substantially neutral value.
  • the fabric obtained with the aforementioned yarn has a high degree of optic white tone and a high tear resistance, making it suitable for manufacturing high quality garments.
  • the bath temperature was maintained at a temperature of 60°C and the pH at about 7, a substantially neutral value.
  • a fabric was produced with the yarn which fabric was found to have a good tone of optical white, with high mechanical strength, which allowed manufacturing high quality garments.
  • the permanence in the bath lasted for a time comprised between 60 and 90 minutes, with the bath temperature maintained at 60°C and with a substantially neutral pH.
  • the piece of fabric was washed in cold water. It was found that the fabric had a high degree of optic white tone as well as a conventional tear resistance such as to allow the use thereof for manufacturing garments of excellent quality and durability.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Claims (6)

  1. Verfahren zum Bleichen von Textilprodukten, die aus Fasern tierischen Ursprungs erhalten wurden, die zuvor keiner Bleichbehandlung unterzogen wurden, zu einem optisch weißen Ton, dadurch gekennzeichnet, dass es Folgendes umfasst:
    - Bereitstellen eines Bades zur Behandlung des Textilprodukts, bestehend aus einer Wassermenge von mindestens 15 Litern pro 1000 Gramm Gewicht des im Bad zu behandelnden Produkts, aus mindestens 75 Gramm von 90%igem Hydrosulfit, aus einem Lösungsmittel zur Entfernung von Fettstoffen aus tierischen Fasern, in einer Menge von mindestens 15 Gramm und aus mindestens 20 Gramm einer optischen Aufhellerverbindung,
    - Belassen des Produkts für einen Zeitraum zwischen 60 und 90 Minuten im Bad,
    - Halten der Badtemperatur während der Behandlung des Produkts auf einem Niveau nicht höher als 60 °C
    wobei das der Behandlung im Bad zu unterziehende Textilprodukt aus Fasern tierischen Ursprungs besteht, die für das Spinnen bereitgestellt sind, sogenannte TOPS, ohne eine Bleichbehandlung erhalten zu haben, oder wobei das der Behandlung im Bad zu unterziehende Textilprodukt aus extrafeinen gekämmten Garnen tierischen Ursprungs besteht, die noch keine Bleichbehandlung erhalten haben.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass es nach der Entnahme des Produkts aus dem Bad eine Kaltwäsche des Produkts umfasst.
  3. Verfahren nach Anspruch 1, wobei die Anzahl der extrafeinen gekämmten Garne zwischen Dtex 200 (Nm 50.000) und Dtex 55 (Nm 180.000) liegt.
  4. Verfahren nach Anspruch 1, wobei das der Behandlung im Bad zu unterziehende Textilprodukt aus einem Gewebe aus den extrafeinen gekämmten Garnen tierischen Ursprungs besteht, die noch keine Bleichbehandlung erhalten haben.
  5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass es den Schritt zum Halten des Bades auf einem im Wesentlichen neutralen pH-Wert umfasst.
  6. Verfahren nach einem der Ansprüche 1 bis 5, wobei die Fasern tierischen Ursprungs, rein oder gemischt zwischen ihnen, solche aus Kaschmir, Wolle, Alpaka, Vicuña, Seide enthalten.
EP20155094.4A 2019-02-15 2020-02-03 Verfahren zum optischen aufhellen von textilprodukten aus tierischen fasern und nach diesem verfahren behandelte textilprodukte Active EP3696315B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT201900002261 2019-02-15

Publications (2)

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EP3696315A1 EP3696315A1 (de) 2020-08-19
EP3696315B1 true EP3696315B1 (de) 2024-04-03

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EP20155094.4A Active EP3696315B1 (de) 2019-02-15 2020-02-03 Verfahren zum optischen aufhellen von textilprodukten aus tierischen fasern und nach diesem verfahren behandelte textilprodukte

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU412980B2 (en) 1966-10-04 1971-05-05 Commonwealth Scientific And Industrial Research Organization Processes for whitening and/or retarting sunlight yellowing of protein fibres
CH554848A (de) 1967-10-03 1974-10-15 Ciba Geigy Ag Verfahren zur herstellung neuer stilben-derivate.
CH492069A (de) 1967-10-13 1970-02-27 Geigy Ag J R Verwendung von 1-(Pyrazolinylphenylsulfonyl)-piperazinen zum optischen Aufhellen von Wolle und Textilmaterial aus Polymerisaten oder Copolymerisaten des Acrylnitrils
US6663677B2 (en) * 2000-10-16 2003-12-16 Rohm And Haas Company Methods for use in wool whitening and garment washing
CN103243543B (zh) * 2013-05-27 2015-03-04 宁夏荣昌绒业集团有限公司 一种有色山羊绒散纤维的脱色方法

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EP3696315A1 (de) 2020-08-19

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