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EP2235253A1 - Procédé de traitement de corps moulés cellulosiques - Google Patents

Procédé de traitement de corps moulés cellulosiques

Info

Publication number
EP2235253A1
EP2235253A1 EP09704213A EP09704213A EP2235253A1 EP 2235253 A1 EP2235253 A1 EP 2235253A1 EP 09704213 A EP09704213 A EP 09704213A EP 09704213 A EP09704213 A EP 09704213A EP 2235253 A1 EP2235253 A1 EP 2235253A1
Authority
EP
European Patent Office
Prior art keywords
chitosan
fibers
dispersion
shaped body
treatment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09704213A
Other languages
German (de)
English (en)
Other versions
EP2235253B1 (fr
Inventor
Sigrid Redlinger
Werner Richardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lenzing AG
Original Assignee
Lenzing AG
Chemiefaser Lenzing AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lenzing AG, Chemiefaser Lenzing AG filed Critical Lenzing AG
Publication of EP2235253A1 publication Critical patent/EP2235253A1/fr
Application granted granted Critical
Publication of EP2235253B1 publication Critical patent/EP2235253B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
    • D06M15/03—Polysaccharides or derivatives thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
    • D06M23/08—Processes in which the treating agent is applied in powder or granular form
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31975—Of cellulosic next to another carbohydrate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2762—Coated or impregnated natural fiber fabric [e.g., cotton, wool, silk, linen, etc.]
    • Y10T442/277—Coated or impregnated cellulosic fiber fabric

Definitions

  • the invention relates to a process for the treatment of a cellulosic molding.
  • the invention relates to a method for modifying the properties of cellulosic moldings by means of chitosan.
  • Chitin and chitosan are natural, biodegradable, non-toxic, non-allergenic, bioactive and biocompatible polymers and similar in their structure to cellulose.
  • Chitin is derived from crustacean casing, a waste product of the crab and shrimp industry.
  • Chitosan is composed of poly (1,4) -2-amino-2-deoxy-beta-D-glucose and is obtained by deacetylation of chitin (poly (1,4) -2-acetamido-2-deoxy-beta-D Glucose).
  • chitin poly (1,4) -2-acetamido-2-deoxy-beta-D Glucose.
  • solubility - chitin is insoluble in water, organic solvents, dilute acids and alkalis - chitosan, which is soluble in dilute acids, aqueous methanol and glycerine, is of far greater importance.
  • Fields of application for chitin and chitosan are in biotechnology for the immobilization of cells and enzymes, in medicine for wound treatment, in the food sector as food additive and preservative, in agriculture for seed conservation, in sewage systems as flocculants and chelating agents with heavy metals.
  • Chitosan fibers find their application in the medical field, for example as wound coverings and surgical suture threads due to the antibacterial properties and the growth inhibition on pathogenic germs.
  • Chitin or chitosan can be degraded enzymatically or hydrolytically by the body's own enzymes and are therefore absorbable fibers.
  • the effect of these natural polymers in wound healing consists in the gradual release of N-acetyl-glucosamine, the mucopolysaccharide organization of collagen and the positive influence on tissue growth in the course of wound healing (EP 0 077 098, US 4309534, JP81 / 112937, JP84 / 1 16418 and many more).
  • fibers of 100% chitosan have a low dry strength (chitosan fibers from the company Innovative Technology Ltd., Winsford, England: titer 0.25 tex, fiber strength conditioned 9 cN / tex, fiber elongation conditioned 12.4% Chitosan fibers of the company Korea Chitosan Co. LTD: fiber strength conditioned 15 cN / tex, fiber elongation conditioned 26%), are extremely brittle and the wet strength is only 30% of the dry strength. Therefore either chitosan fibers are mixed with other man-made fibers or already used in the manufacturing process of e.g. Viscose fibers chitosan added to the spinning mass.
  • viscose fibers with incorporated chitin / chitosan for example under the trade name Crabyon (Omikenshi Co.) and Chitopoly (Fuji Spinning Co.)
  • chitosan-incorporated viscose fibers for example under the trade name Crabyon (Omikenshi Co.) and Chitopoly (Fuji Spinning Co.)
  • Crabyon Opmikenshi Co.
  • Chitopoly Fruji Spinning Co.
  • These fibers are produced, for example, by chitosan or acetylated chitosan in powder form having a particle size of less than 10 ⁇ m in an amount of 0.5 to 2% by weight is dispersed in water and the viscose spinning solution is added (US 5,320,903) .Fibres are then produced by the conventional viscose or Polynosic vide.
  • chitosan-incorporated viscose fibers have increased dye affinity, increased water retention, anti-fungicidal and odor-inhibiting properties, however also known for viscose fibers low wet strength. Since chitosan prevents the growth of bacteria harmful to the skin and eliminates allergic effects, eg chitopoly tissues are particularly suitable for dermatitis patients.
  • the fibers thus obtained contain the finest chitosan particles, since the chitosan is not soluble in the spinning mass.
  • chitosan In order to ensure the effect of the chitosan in the final product, moreover, an amount of at least about 10% by weight of chitosan must be incorporated into the fibers, since only then is sufficient chitosan on the fiber surface. The chitosan incorporated in the fibers is inaccessible and therefore ineffective.
  • lyocell fibers solvent-spun cellulose fibers made by the amine oxide process
  • DE 195 44 097 describes a process for producing shaped bodies from polysaccharide mixtures by dissolving cellulose and a secondary polysaccharide in an organic, water-miscible polysaccharide solvent (preferably NMMO), which may also contain a secondary solvent.
  • NMMO organic, water-miscible polysaccharide solvent
  • KR-A 9614022 describes the production of chitin-cellulose fibers, called “chitulose”, by reacting chitin and cellulose in a solvent from the group of dimethylimidazolines / LiCl, dichloroacetate / chlorohydrocarbon, dimethylacetamide / LiCl, N-methylpyrrolidone / LiCl In the claims, NMMO is not mentioned.
  • KR-A-2002036398 describes the incorporation of elaborately prepared chitosan derivatives with quaternary ammonium groups in fibers.
  • DE-A 100 07 794 describes the preparation of polymer compositions comprising a biodegradable polymer and a material from marine plants and / or shells of marine animals and the production of moldings therefrom. Claimed is also the addition of material from sea plants, seafood in powder form, powder suspension or liquid form to the cellulose solution prepared by the Lyocell compiler. Furthermore, the material can also be added after or during the comminution of the dry cellulose, and at any stage of the manufacturing process. Despite the addition of the additive, the fibers show the same textile mechanical properties as without additive. In the examples, only Lyocell fibers are described which have incorporated brown algae powder, wherein the brown algae flour, NMMO and pulp and stabilizer are mixed and heated to 94 ° C for the production of the dope.
  • FKZ 95 / NR 036 F that chitosan is dissolved in dilute organic or inorganic acids and then precipitated in an aqueous NMMO solution to obtain a suspension of fine chitosan crystals in the cellulose solution, which are then spun
  • the chitosan remains as fine crystals in the solution even after dissolving the cellulose, resulting in a micro-heterogeneous second phase system in the fiber.
  • the strength of the fiber is low (at 10% chitosan fiber strength conditioned 19.4 cN / tex, fiber elongation conditioned 11.5%).
  • a chitosonium polymer (a salt of chitosan with an inorganic or organic acid) which is soluble in the spinning solution by addition to the spinning solution or a precursor thereof.
  • Nano-chitosans are understood to mean approximately spherical solids which have a mean diameter in the range from 10 to 300 nm and, due to the small particle diameter, are interposed between the fibrils.
  • the production of nano-chitosans takes place by spray-drying, evaparation or relaxation of supercritical solutions.
  • WO 01/32751 describes a process for the preparation of nanoparticulate chitosan for cosmetic and pharmaceutical preparations having particle diameters of 10 to 1000 nm, in which the pH of an aqueous acidic solution of chitosan is increased in the presence of a surface modifier to such an extent that it precipitates Chitosan's comes.
  • WO 91/00298 describes the preparation of microcrystalline chitosan dispersions and powders with particle diameters of 0.1 to 50 ⁇ m, in which the pH of an aqueous acidic chitosan solution is increased to such an extent that precipitation of the chitosan occurs ,
  • WO 97/07266 describes the treatment of a lyocell fiber with a 0.5% acetic acid chitosan solution.
  • WO 2004/007818 describes not only the incorporation of a chitosonium polymer into lyocell fibers, but also the treatment of never-dried lyocell fibers with the solution or suspension of a chitosonium polymer. It has been found that this method is only suitable for the treatment of never dried Lyocell fibers.
  • the object of the present invention is to provide a process for the treatment of cellulosic molded articles which does not have the aforementioned problems of incorporation of chitosan into fibers and which is suitable for various types of cellulosic fibers, whether dried or never-dried.
  • the chitosan is to be fixed in particular on the fiber surface of cellulose regenerated fibers (lyocell fibers, modal fibers, viscose fibers, polynosic fibers) preferably during the manufacturing process so that the chitosan is still present on the final product after a series of household washes ,
  • This object is achieved by a process for the treatment of a cellulosic molding, which is characterized in that the molding is brought into contact with an alkaline dispersion which contains undissolved chitosan particles.
  • chitosan particles are present in the dispersion preferably in a particle size of from 0.1 to 1500 .mu.m, particularly preferably from 1 to 800 .mu.m.
  • the pH of the dispersion is preferably more than 7, particularly preferably 9 to 11.
  • chitin is intended to mean a ⁇ -1,4-linked polymer of 2-acetamido-2-deoxy-D-glucose having a degree of deacetylation of 0%
  • chitosan an at least partially deacetylated ß-l, 4-bonded polymer of 2-acetamido-2-deoxy-D-glucose.
  • the method according to the invention has the advantage that an incorporated chitosan is not accessible in the interior of the shaped body. Only chitosan on the surface of the molding can come in contact with the skin and thus develop its positive effect. Therefore, in order to achieve the same amount of chitosan as impregnated on the surface of a molded article, much higher amounts of chitosan must be used in the incorporation. In particular, there is an advantage over the use of nano-chitosan due to the high production cost of nano-chitosan.
  • the process according to the invention has the advantage that the impregnation described there with an acid solution of a chitosonium polymer does not work in the treatment of never-dried viscose, modal or polynosic fibers with subsequent steaming. There are only very low Chitosanauflagen achieved, and the implementation of this method is not possible without modification of existing plants.
  • the process according to the invention is more cost-effective than the process described in WO 2004/007818, since cheaper chitosan types can preferably be used (see below).
  • the content of the chitosan particles in the dispersion is 0.001 to 10% by weight, preferably 0.1 to 2% by weight.
  • chitosan types which are soluble in an acid (for example lactic acid) and, when precipitated with alkali, give dispersions with chitosan particles having a particle size of from 0.1 to 1500 ⁇ m, are suitable for carrying out the process according to the invention.
  • the solubility of a chitosan type in acids depends essentially on the degree of de-acetylation of the chitosan. If the de-acetylation is too low, the solubility will be worse.
  • higher molecular weight chitosan types (having a viscosity of 1% strength solution in 1% solution of acetic acid at 20-25 ° C. of 200 mPa.s or more, measured with Brookfield Viscosmeter at 30 rpm) are also suitable for carrying out the process according to the invention.
  • Higher molecular weight chitosans are generally less expensive.
  • the shaped body treated according to the invention is preferably in the form of fibers.
  • the fibers may in particular be lyocell fibers, modal fibers, polynosic fibers and / or viscose fibers.
  • lyocell has been awarded by BISFA (The International Bureau for the Standardization of Man Made Fibers) and stands for cellulose fibers made from solutions of cellulose in an organic solvent are used as solvents tertiary amine oxides, in particular N-methyl-morpholine-N-oxide (NMMO).
  • BISFA The International Bureau for the Standardization of Man Made Fibers
  • NMMO N-methyl-morpholine-N-oxide
  • Viscose fibers are fibers obtained from an alkaline solution of cellulose xanthogenate (viscose) by precipitation and regeneration of the cellulose.
  • Modal fibers are cellulosic fibers that are characterized by high wet tensile strength and high wet modulus (the force needed to stretch a fiber when wet by 5%) as defined by BISFA.
  • the fibers may be present in the form of an already dried form during the treatment with the chitosan dispersion, in particular as a constituent of a textile article, preferably a game, a woven fabric, a knitted fabric or a garment made therefrom.
  • the fibers may never be dried.
  • the fibers may be present in particular in the form of a non-woven fabric, as occurs during the production process of lyocell, viscose, modal and Polynosicstapelmaschinen as an intermediate.
  • This variant has the advantage that the treatment can be implemented without the necessity of apparative changes in an existing plant for the production of lyocell, viscose, modal or polynosic fibers. Treatment of never-dried viscose, modal or polynosic fibers with chitosan has not previously been described.
  • the fibers may have a residual moisture of 50% to 500% before treatment.
  • the molding may be subjected to superheated steam treatment. As a result, an additional fixation of the chitosan on the surface of the molding can be achieved.
  • chitosan is preferably dissolved in an inorganic or organic acid (e.g., lactic acid), and then alkali is added to precipitate the chitosan.
  • an aqueous alkali hydroxide solution e.g. NaOH
  • the final pH is preferably 9 to 11.
  • the chitosan dispersion thus obtained may, for example, be used for continuous treatment with an initially moist, e.g. Pressing to a defined moisture of 50% to 500% adjusted cellulose Regeneratmaschinevlies be brought into contact.
  • the nonwoven may e.g. be soaked by spraying. For this, e.g. without the need for a conversion of existing production facilities in plants for the production of viscose fibers and modal fibers the so-called bleaching field can be used.
  • the web After impregnation, the web can be pressed to a defined moisture content of 50% - 500% and the squeezed treatment liquor can be returned to the impregnation circuit.
  • the fleece is either treated with superheated steam and then washed neutral or washed neutral without steam treatment, scavenged and dried.
  • the dispersion is prepared in situ by dosing an acidic solution of chitosan into an alkaline treatment liquid, e.g. a lubricant bath, is prepared and the molding is treated simultaneously with the treatment liquid and the dispersion formed in situ.
  • an alkaline treatment liquid e.g. a lubricant bath
  • the acid chitosan solution e.g.
  • the chitosan dispersion is generated in situ in a fiber-avivage bath, which has a pH value> 7, and thus the fiber is simultaneously impregnated with chitosan and scavenged. Subsequently, the fiber can be dried without washing.
  • the shaped body is subjected to a treatment with a crosslinking agent before or after drying.
  • a crosslinking agent Suitable crosslinking agents are described, for example, in WO 99/19555.
  • Such crosslinking agents are applied to the fiber in an alkaline medium. If, in a typical procedure, the fiber is brought into contact with the crosslinking agent in an alkaline medium, if necessary by means of superheated steam fixing the crosslinking agent and then applying an acidic solution of chitosan on the fiber, there is also an in-sita formation of an alkaline due to the alkalinity of the fiber surface Chitosan dispersion.
  • the alkaline chitosan dispersion can also be prepared in situ by applying an acidic chitosan solution to an alkaline or fiber surface alkaline due to alkaline pretreatment.
  • the present invention also relates to a shaped article obtainable by the method according to the invention.
  • the shaped body according to the invention can be present in particular in the form of fibers, preferably lyocell fibers, modal fibers, polynosic fibers and / or viscose fibers.
  • a characteristic of the moldings obtainable by the process according to the invention is that the surface of the mold has punctiform distributed chitosan particles.
  • a film-like distribution of the chitosan particles on the surface can be detected.
  • the present invention also relates to the use of a shaped article according to the invention as an antibacterial product, as an odor-inhibiting product, in nonwoven products and / or as filler fiber.
  • Preferred fields of application of chitosan-containing cellulose regenerate fibers according to the invention comprise textiles worn close to the body, such as, for example, mildly antibacterial, odor-inhibiting, skin-friendly properties. Underwear or socks, textiles for people with sensitive skin (atopic dermatitis), bed linen and home textiles.
  • the fiber of the present invention may be used either alone or in admixture with other fibers, e.g. Cotton, polyester fibers and unmodified cellulose fibers (e.g., lyocell fibers).
  • FIG. 1 shows the distribution of the chitosan particles on the surface of a lyocell fiber produced according to the invention.
  • Figure 2 shows the distribution of chitosan on the surface of a lyocell fiber prepared according to the method described in WO 2004/007818 (application of an acidic solution of a chitosonium polymer).
  • chitosan To prepare 500 ml of a 0.4% chitosan solution, 2 g of chitosan are made up to 497.6 g with distilled water, admixed with 2.4 g of lactic acid (81.2%), stirred until the chitosan is completely dissolved, and then with stirring adjusted to a pH of 11.0 with 5% NaOH solution. The result is an approximately 0.4% chitosan dispersion.
  • the determination of the chitosan coating on the fiber is carried out by measuring the N content
  • FITC fluorescein isothiocyanate
  • a hot water treatment is carried out: boil the card sliver of the chitosan impregnated fibers at 80 to 90 ° C in the beaker (liquor ratio 1:20, after 20 min at 80 to 90 ° C water, after Reach the temperature again for 20 min.
  • Ig chitosan are made up to 498.8 g with distilled water, added with 1.2 g lactic acid (81.2%), stirred until the chitosan is completely dissolved and then with stirring 5% with NaOH to a pH of 10.0.
  • the result is an approximately 0.2% chitosan dispersion.
  • Knit stockings were made from the fibers and the permanence of the chitosan overlay was tested under high temperature polyester dye conditions ("HAT permanence").
  • chitosan To prepare 500 ml of 0.2% chitosan solution, 1 g of chitosan are made up to 498.8 g with distilled water, treated with 1.2 g of lactic acid (81.2%), stirred until the chitosan is completely dissolved and then under Stir with NaOH 5% to a pH of 10.0. The result is an approximately 0.2% chitosan dispersion.
  • Knit stockings were made from the fibers and the permanence of the chitosan overlay was tested under high temperature polyester dye conditions ("HAT permanence").
  • chitosan To prepare 500 ml of a 0.6% chitosan solution, 3 g of chitosan are made up to 496.4 g with distilled water, 3.6 g of lactic acid (81.2%) are added, stirred until the chitosan is completely dissolved and then while stirring 5% with NaOH to a pH of 11.0. The result is an approximately 0.6% chitosan dispersion.
  • the fibers were subjected to a household wash in a washing machine (gentle cycle at 60 ° C, commercially available liquid detergent, dosage according to the manufacturer, fibers in laundry bags, wash after household washing once again by hand, dry). There were three washes done.
  • fibers of the genus Lyocell were prepared in the continuous production process l, 7dtex 38 mm and never dried according to the invention with a dispersion of alkaline precipitated chitosan, type TM 2284 (0.2 wt.%) In the liquor ratio 1: 20 impregnated to a target of 0.6 wt.% Chitosan, steamed, washed out, washed and dried. From the fibers thus produced with an achieved chitosan coverage of 0.5% by weight, yarns Nm 50 were spun and processed into a textile fabric (single jersey knit), which had 0.4% by weight chitosan coating.
  • FIG. 1 shows a confocal microscopy photograph of a fluorescein isothiocyanate-colored fiber produced according to Example 4. The punctiform distribution of chitosan (bright spots) is clearly visible.
  • Figure 2 shows the distribution of chitosan on the surface of a lyocell fiber prepared according to the method described in WO 2004/007818 (application of an acidic solution of a chitosonium polymer).
  • the chitosan (bright areas) is distributed like a film on the surface.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microbiology (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Artificial Filaments (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

La présente invention concerne un procédé de traitement d'un corps moulé cellulosique, qui est caractérisé en ce que le corps moulé est mis en contact avec une dispersion alcaline contenant des particules non dissoutes de chitosane. Les particules de chitosane présentes dans la dispersion ont de préférence une granulométrie comprise entre 0,1 et 1500 µm, de préférence entre 1 et 800 µm.
EP20090704213 2008-01-22 2009-01-19 Procédé de traitement de corps moulés cellulosiques Active EP2235253B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0008208A AT506334B1 (de) 2008-01-22 2008-01-22 Verfahren zur behandlung cellulosischer formkörper
PCT/AT2009/000015 WO2009092121A1 (fr) 2008-01-22 2009-01-19 Procédé de traitement de corps moulés cellulosiques

Publications (2)

Publication Number Publication Date
EP2235253A1 true EP2235253A1 (fr) 2010-10-06
EP2235253B1 EP2235253B1 (fr) 2012-06-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090704213 Active EP2235253B1 (fr) 2008-01-22 2009-01-19 Procédé de traitement de corps moulés cellulosiques

Country Status (9)

Country Link
US (1) US8524326B2 (fr)
EP (1) EP2235253B1 (fr)
JP (1) JP2011510183A (fr)
KR (1) KR101662678B1 (fr)
CN (1) CN101932767A (fr)
AT (1) AT506334B1 (fr)
ES (1) ES2392481T3 (fr)
TW (1) TWI401350B (fr)
WO (1) WO2009092121A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT507386A1 (de) * 2008-09-22 2010-04-15 Chemiefaser Lenzing Ag Verfahren zur behandlung cellulosischer formkörper
AT509289B1 (de) * 2009-12-28 2014-06-15 Chemiefaser Lenzing Ag Funktionalisierter cellulosischer formkörper und verfahren zu seiner herstellung
EP2368532A1 (fr) 2010-03-25 2011-09-28 Ganzoni & Cie AG Textiles de compression contenant des fibres revêtues de chitosan
JP2013527329A (ja) * 2010-03-25 2013-06-27 レンツィング アクチェンゲゼルシャフト セルロース繊維の使用
EP2540263A1 (fr) 2011-06-29 2013-01-02 Sigvaris Inc. Vêtements à compression graduée
US8899277B2 (en) * 2012-08-03 2014-12-02 Shin Era Technology Co., Ltd. Manufacturing method of medical textiles woven from chitosan containing high wet modulus rayon fibre
CN113882027A (zh) * 2021-11-02 2022-01-04 冯建国 基于甲壳素的产品制备方法、产品与结构

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US8524326B2 (en) 2013-09-03
KR20100109964A (ko) 2010-10-11
EP2235253B1 (fr) 2012-06-20
WO2009092121A1 (fr) 2009-07-30
US20100297408A1 (en) 2010-11-25
ES2392481T3 (es) 2012-12-11
CN101932767A (zh) 2010-12-29
AT506334A1 (de) 2009-08-15
KR101662678B1 (ko) 2016-10-05
JP2011510183A (ja) 2011-03-31
TWI401350B (zh) 2013-07-11
AT506334B1 (de) 2010-12-15
TW200932993A (en) 2009-08-01

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