CN103025950A - Method for the production of oxidized cellulose fibers, oxidized cellulose fiber sheet materials or oxidized cellulose nonwovens, and use thereof - Google Patents

Method for the production of oxidized cellulose fibers, oxidized cellulose fiber sheet materials or oxidized cellulose nonwovens, and use thereof Download PDF

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Publication number
CN103025950A
CN103025950A CN2011800362280A CN201180036228A CN103025950A CN 103025950 A CN103025950 A CN 103025950A CN 2011800362280 A CN2011800362280 A CN 2011800362280A CN 201180036228 A CN201180036228 A CN 201180036228A CN 103025950 A CN103025950 A CN 103025950A
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oxycellulose
oxidized cellulose
fabric
nonwoven fabric
cellulose fiber
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薇伯科·施密茨
茱莉亚·施密特
贝恩特·施莱斯曼
甘特·沙芬博格
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Carl Freudenberg KG
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Carl Freudenberg KG
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    • 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
    • D06M23/06—Processes in which the treating agent is dispersed in a gas, e.g. aerosols
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/28—Polysaccharides or their derivatives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
    • C08B15/02—Oxycellulose; Hydrocellulose; Cellulosehydrate, e.g. microcrystalline cellulose
    • C08B15/04—Carboxycellulose, e.g. prepared by oxidation with nitrogen dioxide
    • 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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
    • D06M11/59—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with ammonia; with complexes of organic amines with inorganic substances
    • D06M11/60—Ammonia as a gas or in solution
    • 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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
    • D06M11/64—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with nitrogen oxides; with oxyacids of nitrogen or their salts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/001—Modification of pulp properties
    • D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
    • 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
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/02—Natural fibres, other than mineral fibres
    • D06M2101/04—Vegetal fibres
    • D06M2101/06—Vegetal fibres cellulosic
    • 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.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Textile Engineering (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Veterinary Medicine (AREA)
  • Polymers & Plastics (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biochemistry (AREA)
  • Epidemiology (AREA)
  • Medicinal Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hematology (AREA)
  • Wood Science & Technology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Materials For Medical Uses (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The aim of the invention is to devise an improved method for producing oxidized cellulose fibers, oxidized cellulose fiber sheet materials, or oxidized cellulose nonwovens which is particularly simple or efficient and environmentally friendly. Furthermore, the oxidized cellulose fibers, oxidized cellulose fiber sheet materials, or oxidized cellulose nonwovens produced according to said method should absorb a particularly large amount of aqueous.9% sodium chloride solution (physiological salt solution), be water-insoluble, and be suited for multiple purposes, in particular medical uses, preferably for dressing wounds. According to the invention, the method for producing oxidized cellulose fibers, oxidized cellulose fiber sheet materials, or oxidized cellulose nonwovens, especially oxidized cellulose wound dressing, in particular having a degree of oxidation ranging from 1 to 50 percent, preferably from 5 to 35 percent, comprises the following steps: a) using cellulose fibers, cellulose sheet materials, or cellulose nonwovens; b) bringing the temperature within a range of 25 to 80 DEG C, preferably 30 to 60 DEG C; c) introducing gaseous nitrogen dioxide; d) bringing the temperature within a range of 20 to less than 160 DEG C, preferably up to 100 DEG C; and e) neutralizing the oxidized cellulose fibers, oxidized cellulose fiber sheet materials, or oxidized cellulose nonwovens with bases, in particular gaseous ammonia.

Description

Production method and the application thereof of oxidized fibre cellulose fiber, oxycellulose fabric or oxycellulose nonwoven fabric
Technical field
The present invention relates to a kind of method and application thereof for the production of oxidized fibre cellulose fiber, oxycellulose fabric or oxycellulose nonwoven fabric.
Fabric described here especially refers to some fibers in order or the single or multiple lift aggregation of lack of alignment.
Background technology
Patent US3,364,200A have described with nitrogen dioxide/dinitrogen tetroxide cellulose have been carried out oxidation, for use in medical field.According to patent US3,364,200A uses liquid nitrogen dioxide, dinitrogen tetroxide and composition thereof that cellulose is carried out oxidation, processes oxidized cellulose with special washing methods, and described washing methods especially also uses halogenated hydrocarbons.
From environmental, said method existent defect and purifying step that need to be extra.
According to patent DE4426443A1, use nitrogen dioxide/dinitrogen tetroxide gas to polysaccharide powder, especially starch carries out oxidation.For starch is fully mixed with gas, the supplementary element of preferred example such as zeolite or silicon gel and so on must be separated these supplementary elements after processing finishes again.Made polycarboxylate powder can be as builder or the common builder in washing agent and the cleaning agent.
Summary of the invention
Task of the present invention is, a kind of improving one's methods for the production of oxidized fibre cellulose fiber, oxycellulose fabric or oxycellulose nonwoven fabric is provided, in particular for producing improving one's methods of oxycellulose dressing, because the method is not used additional additive package, especially can not produce discarded object and/or not need complicated cleaning, the simple especially efficient and environmental protection of the method.
The oxidized fibre cellulose fiber of making according to the method in addition, oxycellulose fabric or oxycellulose nonwoven fabric have strong especially absorbability to 0.9% sodium-chloride water solution (normal saline solution), water insoluble and be applicable to multiple use, be particularly useful in the medical application fields, especially for wound care.
Determine absorbability to 0.9% sodium-chloride water solution according to DIN53923.What wherein measure is to the absorbability of 0.9% sodium-chloride water solution rather than to the absorbability of water.
According to the present invention, method for the production of oxidized fibre cellulose fiber, oxycellulose fabric or oxycellulose nonwoven fabric (especially oxidizability is 1～50%, preferably at 5～35% oxidized fibre cellulose fiber, oxycellulose fabric or oxycellulose nonwoven fabric) may further comprise the steps:
A) adopt cellulose fibre, cellulosic fabric or cellulosic nonwoven fabric;
B) temperature is adjusted to 25 ℃～80 ℃, preferably adjusted to 30 ℃～60 ℃;
C) pass into gaseous nitrogen dioxide;
D) temperature is adjusted to 20 ℃ to being lower than 160 ℃, preferred until 100 ℃; And
E) use alkali, especially gaseous ammonia, in coming and oxidized fibre cellulose fiber, oxycellulose fabric or oxycellulose nonwoven fabric.
In this article, the fiber that oxycellulose is made, fabric or nonwoven fabric refer to fiber, fabric or the nonwoven fabric of being made by pure cellulose, and are combined with other polysaccharide and fiber, fabric or the nonwoven fabric made by cellulose derivative or cellulose.
The preferred cellulose ether of considering to use methylcellulose, ethyl cellulose or butyl cellulose, Carboxymethyl Cellulose, hydroxyethylcellulose, hydroxypropyl cellulose, carboxymethyl cellulose and so on, the cellulose esters of cellulose acetate and so on, bacteria cellulose, viscose, and their copolymer, such as block copolymer, graft copolymer, statistics or alternate copolymer.
The fibre count of cellulose fibre, cellulose base fiber fabric or the cellulosic nonwoven fabric that uses as raw material is 0.5dtex～30dtex, be preferably 1dtex～10dtex, be particularly preferably 1.5dtex～5dtex, and the fibre length that especially preferably has 3mm～120mm, wherein for nonwoven production, optimum fiber length is between 5mm to 80mm.Because fiber, fabric or nonwoven fabric are all ventilative and have capillary force, therefore for example compare with the situation of using powder, this is conducive to make gaseous oxidizer to pass through smoothly reactor.Gas can pass through along fiber, thereby so that oxidizing gas evenly distribute.
Relative with it, if use powder, then be difficult to control reaction process because need special make reactor or need to use can guarantee well-mixed additive, with avoid will oxidation polysaccharide caking and assurance formation backset bed occur.
Method of the present invention can realize especially simply, reactor design flexibly.
For being reduced to water capacity, air humidity mostly is 7wt% most, and make used cellulose fibre, cellulosic fabric or cellulosic nonwoven fabric reach required temperature, the inert gas that preferred use has been preheating to reaction temperature carries out drying to reactor, for example can use helium, argon gas or carbon dioxide, also can use air, preferably use nitrogen.Reaction temperature is 25 ℃～80 ℃, is preferably 30 ℃～60 ℃.
In the preferred embodiment of the method for the invention, pass into gaseous nitrogen dioxide with respect to oh group that will oxidation with the gas flow of 0.1～10 molar equivalent per hour.Preferably same this operation of execution under preheat mode.
By using gaseous state rather than liquid nitrogen dioxide can realize very high reactivity, especially can realize shorter being detained time or reaction time.
Owing to using cellulose fibre, cellulosic fabric or cellulosic nonwoven fabric not to need fully to mix, therefore can be in the situation that gas flow be especially little reacts.This also is conducive to improve security, because for example when breaking down or reactor when occur leaking, the employee is exposed in the nitrogen dioxide of low concentration.Simultaneously, without other the auxiliary even distribution that just is easy to realize gas, thus the especially uniformly oxidation product that can obtain to have even oxidizability.
Advantageously, with respect in the cellulose with oxidized hydroxyl, the oxidizability of expectation reaches 1～50%, and is preferred 5%～35%, and for example can utilize infra-red sepectrometry (IR) or oxide group titration to measure oxidizability.
For require special product, especially as for the dressing, to higher oxidizability and lose interest in nor feasible, because for example dressing should form colloid in the situation that absorb large water gaging, and dissolve should be as washing agent or cleaning agent use the time.
At the oxidant that passes into requirement or when reaching required oxidizability, in order to make balance towards the product side shifting, can the temperature of whole reactant be adjusted to 20 ℃～100 ℃ in the situation that do not continue to add oxidant, to note during this period not surpassing 160 ℃ the upper limit, increase because under higher temperature, can be observed to decompose.
Especially also can be in the situation that use nitrogen dioxide to utilize this step to guarantee that the content of nitrogen-containing group in the end product is minimum as oxidant.
In order to remove remaining oxidant, especially nitrogen dioxide, preferably use inert gas, especially nitrogen to wash.
The special environmental protection of method of the present invention, simple and efficient, because carrying out can circulating in the process in processing carries especially gaseous nitrogen dioxide of gaseous oxidizer, and other chemicals of example such as fluorine hydrocarbon (Fluorkohlenwasserstoffe) or hydrochlorofluorocar.on (Fluorchlorkohlenwasserstoffe) and so on not.
The nitrogen oxide that produces when reacting with nitrogen dioxide can be by carrying out oxidation and again change nitrogen dioxide into oxygen, and use it for further oxidation reaction, in order to improve thus the environmental balance of processing, therefore can not produce discarded object.
Then use alkali, gaseous ammonia especially is in coming and the acidic-group of oxidized fibre cellulose fiber, oxycellulose fabric or oxycellulose nonwoven fabric.
Can certainly consider to select other alkaline reactant to neutralize, for example can use alkaline alcohol solution, for example potassium hydroxide solution.
But, use gaseous ammonia then no longer to need product is purified and drying.Because the mode that this reaction is carried out needn't be used solvent and can not generate discarded object, so this reaction process is efficient especially and environmental protection.
After neutralization finishes, preferably reuse inert gas, especially nitrogen and wash.
Method of the present invention can be finished very soon, especially only needs several hours.If adopt the method for other dressing manufacturer, Johnson ﹠amp for example; The patent US3 of Johnson company, the described method of 364,200A is then processed and will be continued several days.
In the useful embodiment of the method for the invention, at least a additive can be joined among oxidized fibre cellulose fiber, oxycellulose fabric or the oxycellulose nonwoven fabric, described additive is selected from following synthetic polymer, biopolymer, active ingredient and/or special additive:
As synthetic polymer, for example can consider to use polyformaldehyde, polyamide (such as polyamide-66), polyurethane, polyvinylpyrrolidone, polyvinylamine, polymine, polyester (such as polyethylene terephthalate, Merlon), polysiloxanes (such as dimethyl silicone polymer), polyvinyl alcohol, polyolefin (such as polyethylene or polypropylene), polycarboxylic acids (such as polyacrylic acid), polyacrylate, polymethacrylates is (such as polymethyl methacrylate or poly-(hydroxyethyl methylacrylate), polyalkylene oxide (Polyalkylenoxide) (such as polyethylene glycol or poly(ethylene oxide)), polystyrene, polyvinyl acetate, polyvinyl chloride, polycaprolactone, PLA, PGA or poly butyric.
As biopolymer, for example can consider protein (such as collagen, silk-fibroin, keratin, albumin), polysaccharide (such as starch, modified starch), cellulose, cellulose derivative (such as cellulose ether, cellulose esters), bacteria cellulose, viscose, chitin, shitosan, casein, pectin, agar, guar gum, hyaluronic acid or mosanom.
As active ingredient or special additive, for example can consider to make with medicament (such as antibiotic, antalgesic), promote the preparation of wound healing, antibiotic, antiviral or antimicrobial preparation, organic acid, enzyme, vitamin, nicotine, the protein of promotion wound healing, growth factor (such as purine or pyrimidine), stabilizing agent, carbon compound (such as active carbon, Graphene, CNT), metal (such as gold or silver), cyclodextrin, inorganic particle, silica gel particle, pottery (such as silicon gel or silicate).
Above-mentioned polymer can be used as homopolymers, copolymer (for example block copolymer, graft copolymer), statistics or alternately system use, perhaps it is mixed use mutually.
Above-mentioned active ingredient or additive can add or are absorbed with respective pure form, mixture between them and/or coating form.
Particularly preferably use the preparation of polyvinyl alcohol, polyolefin, polyethylene glycol, polyester, medicament and promotion wound healing as additive.
Another advantage of the method for the invention is, course of reaction namely can be reacted under normal pressure in fact without pressure, preferably at 0.1～7 bar (bar), reacts under the pressure particularly preferably in 0.8～3 bar.
Nonwoven fabric can be processed and be consolidated into to the oxidized fibre cellulose fiber.
The fiber that oxycellulose is made, fabric or nonwoven fabric can further be processed into any form.Can make like this it have any 3D shape, and it can be combined with carrier, for example be coated on the carrier or sandwich among the carrier, for example so-called sandwich structure.
Carry out chemical modification after also can considering.
Oxidized fibre cellulose fiber, oxycellulose fabric or the oxycellulose nonwoven fabric made according to the method for the invention all have low especially nitrate and content of nitrite, and its weight percent content is lower than 10wt% usually.
In addition, these fibers, fabric or nonwoven fabric also have particularly preferred absorbability to 0.9% sodium-chloride water solution (physiological saline).
According to oxidized fibre cellulose fiber of the present invention, oxycellulose fabric or oxycellulose nonwoven fabric to the uptake of 0.9% sodium-chloride water solution preferably at 400～10000wt%, particularly preferably in 400～5000wt%, especially preferably at 400～3500wt%.
Therefore these fibers, fabric or nonwoven fabric suit to use at medical field, especially cultivate (Tissue Engineering/ organizational project) or be used for transplanting used as dressing or for dressing, tissue construction or tissue, but they also can be used for packing, cosmetics, amenities or commodity, especially cleaning appliance, and/or can be used for filter, acoustic material and/or carrier material, especially can be used for catalyst converter, furniture, facing material, especially lining or liner in the middle of can be used as are used for sound insulation and/or heat insulation.
The specific embodiment
Below will be explained in detail the present invention according to example.
Example:
In being the flask of 1 bar, temperature about 50 ℃ and preferred pressure add cellulose fibre (100g, utilize NMMO (N-methylmorpholine oxide)-method to make with the fiber number of 1.7dtex), if water capacity in this scope of 0～7wt%, is not then carried out predrying to it.
In order to realize defined condition, can use the inert gas through preheating, preferably use the nitrogen wash flask interior.Then, speed with 6 molar equivalents per hour adds nitrogen dioxide, through have in the cellulose after 30 minutes 9～11% will oxidation the alcohol radical group change carboxylic group into, through have in the cellulose after a hour 30～35% will oxidation the alcohol radical group change carboxylic group into.According to the diameter of fiber, can measure with the mode of infra-red sepectrometry (IR) or titration oxide group the oxidizability of the primary alconol base of glucose molecule.
Stop supplies gas after the reaction heats flask about half an hour under 50 ℃～100 ℃, preferably in about 80 ℃ of lower heating.Utilize this step can guarantee that the content of nitrogen-containing group is minimum in the end product.
Use inert gas, preferably use nitrogen, again wash cellulose fibre, in order to squeeze residual nitrogen dioxide.
The nitrogen oxide that produces in the course of reaction can become nitrogen dioxide with the oxygen reaction by oxidation, then it is supplied to again above-mentioned cellulose oxidation process, to avoid producing discarded object in the closed circuit.Can improve like this environmental balance of course of reaction.
In can coming with all alkali that can use subsequently and the acidic-group of oxycellulose.Here in preferably coming with gaseous ammonia and oxidized fibre, and check gelling.Can product be cleaned or dry by avoiding with gaseous ammonia.
After neutralization, preferably reuse the nitrogen wash flask.
According to degree of oxidation, the oxidized fibre cellulose fiber is 400～3500wt% to the uptake of 0.9% sodium-chloride water solution.
Can be according to the uptake numerical value of DIN53923 mensuration to 0.9% sodium-chloride water solution.Mensuration is to the uptake of 0.9% sodium-chloride water solution rather than the water absorption described in the DIN.

Claims (9)

  1. For the production of oxidizability 1～50%, preferably in the method for 5～35% oxidized fibre cellulose fiber, oxycellulose fabric or oxycellulose nonwoven fabric,
    May further comprise the steps:
    A) adopt cellulose fibre, cellulosic fabric or cellulosic nonwoven fabric;
    B) temperature is adjusted to 25 ℃～80 ℃, preferably adjusted to 30 ℃～60 ℃;
    C) pass into gaseous nitrogen dioxide,
    D) temperature is adjusted to 20 ℃ to being lower than 160 ℃, preferred until 100 ℃, and
    E) use in alkali, the especially gaseous ammonia and oxidized fibre cellulose fiber, oxycellulose fabric or oxycellulose nonwoven fabric.
  2. 2. the method for claim 1 is characterized in that, the cellulose fibre that adopts or cellulosic nonwoven fabric have the fibre length of fibre count and the 3mm～120mm of 0.5dtex～30dtex.
  3. 3. the method according to any one of the preceding claims is characterized in that, the cellulose fibre that adopts, cellulosic fabric or cellulosic nonwoven fabric have the maximum water capacity of 7wt%.
  4. 4. the method according to any one of the preceding claims, it is characterized in that, at least a additive is added among described oxidized fibre cellulose fiber, oxycellulose fabric or the oxycellulose nonwoven fabric, and described additive is selected from synthetic polymer, biopolymer, active ingredient and/or special additive.
  5. 5. method as claimed in claim 4, it is characterized in that, polyvinyl alcohol, polyolefin, polyethylene glycol, polyester, medicament and/or the preparation that promotes wound healing are joined among described oxidized fibre cellulose fiber, oxycellulose fabric or the oxycellulose nonwoven fabric as additive.
  6. 6. the method according to any one of the preceding claims is characterized in that, supplies in the situation that do not add halogenated hydrocarbons, supplies especially in a looping fashion gaseous oxidizer, especially gaseous nitrogen dioxide.
  7. 7. the method according to any one of the preceding claims is characterized in that, under the pressure of 0.1～7 bar, especially carries out described method under the pressure of 0.8～3 bar.
  8. 8. the oxidized fibre cellulose fiber of making according to each described method in the claims, oxycellulose fabric or oxycellulose nonwoven fabric, described oxidized fibre cellulose fiber, oxycellulose fabric or oxycellulose nonwoven fabric are 400～10000wt% to the uptake of 0.9% sodium-chloride water solution.
  9. 9. the oxidized fibre cellulose fiber of making according to each described method in the claims, oxycellulose fabric or the application of oxycellulose nonwoven fabric in medical field, be preferably used as or be used for dressing, tissue construction or tissue are cultivated (organizational project) or are transplanted, be used for packing, cosmetics, amenities or commodity, especially cleaning appliance, and/or for filter, acoustic material and/or carrier material, be particularly useful for catalyst converter, furniture, facing material, especially lining or liner in the middle of can be used as are used for sound insulation and/or heat insulation.
CN2011800362280A 2010-08-18 2011-07-29 Method for the production of oxidized cellulose fibers, oxidized cellulose fiber sheet materials or oxidized cellulose nonwovens, and use thereof Pending CN103025950A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010034782.5 2010-08-18
DE201010034782 DE102010034782A1 (en) 2010-08-18 2010-08-18 Process for the preparation of oxidized cellulose fibers, oxidized cellulose fiber sheets or oxidized cellulose nonwovens and their use
PCT/EP2011/003805 WO2012022421A1 (en) 2010-08-18 2011-07-29 Method for the production of oxidized cellulose fibers, oxidized cellulose fiber sheet materials or oxidized cellulose nonwovens, and use thereof

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CN104131457A (en) * 2014-07-16 2014-11-05 安徽可丽纳米纺织品有限公司 Preparation method of antibacterial non-woven fabric and dip padding liquid for preparation
CN104383588A (en) * 2014-12-01 2015-03-04 哈尔滨工业大学 Single-walled carbon nanotube-grafted modified oxidized regenerated cellulose hemostatic material and preparation method thereof
CN104383587A (en) * 2014-12-01 2015-03-04 哈尔滨工业大学 Fullerene/oxidized regenerated cellulose composite hemostatic material and preparation method thereof
CN106589141A (en) * 2016-12-27 2017-04-26 杭州协合医疗用品有限公司 Novel preparation method for oxidized cellulose
WO2017206131A1 (en) * 2016-06-02 2017-12-07 Gunze Limited Medical fiber structure and medical laminate
CN109937055A (en) * 2016-11-07 2019-06-25 郡是株式会社 Biological tissue's reinforcing material and artificial dura mater
CN114010834A (en) * 2021-10-29 2022-02-08 上海纳米技术及应用国家工程研究中心有限公司 Acetyl-containing oxidized regenerated cellulose hemostatic dressing

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WO2014000754A1 (en) * 2012-06-27 2014-01-03 Center Of Excellence Polymer Materials And Technologies (Polimat) Treatment method for cellulose-containing materials
US9447196B2 (en) * 2012-06-28 2016-09-20 Covidien Lp Dissolution of oxidized cellulose and particle preparation by solvent and non-solvent precipitation
US9447197B2 (en) * 2012-06-28 2016-09-20 Covidien Lp Dissolution of oxidized cellulose and particle preparation by dispersion and neutralization
US9499636B2 (en) 2012-06-28 2016-11-22 Covidien Lp Dissolution of oxidized cellulose and particle preparation by cross-linking with multivalent cations
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