EP3555349A1 - Method for the manufacture of antibacterial viscose filament rayon and a product obtained using that method - Google Patents
Method for the manufacture of antibacterial viscose filament rayon and a product obtained using that methodInfo
- Publication number
- EP3555349A1 EP3555349A1 EP17832187.3A EP17832187A EP3555349A1 EP 3555349 A1 EP3555349 A1 EP 3555349A1 EP 17832187 A EP17832187 A EP 17832187A EP 3555349 A1 EP3555349 A1 EP 3555349A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antibacterial
- cellulose
- viscose
- spinning
- solution
- 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.)
- Pending
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
- D01F2/08—Composition of the spinning solution or the bath
- D01F2/10—Addition to the spinning solution or spinning bath of substances which exert their effect equally well in either
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/02—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from solutions of cellulose in acids, bases or salts
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
- D01F2/08—Composition of the spinning solution or the bath
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
- D01F2/08—Composition of the spinning solution or the bath
- D01F2/12—Addition of delustering agents to the spinning solution
- D01F2/14—Addition of pigments
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/20—Cellulose-derived artificial fibres
- D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
- D10B2201/24—Viscose
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/13—Physical properties anti-allergenic or anti-bacterial
Definitions
- the present invention concerns a method for the manufacture of antibacterial viscose filament rayon and a product obtained using that method.
- the cellulose undergoes the so-called mercerization, being processing of the initial pulp with a concentrated solution of sodium hydroxide (NaOH), resulting in alkali cellulose, which afterwards is subjected to destruction, i.e. aging, where the degree of polymerization is decreased.
- This is followed by temperature reduction and dosing of the alkali cellulose amount for the production of one batch of viscose.
- the next stage is carbon-disulphide treatment which causes the alkali cellulose to transform into cellulose xanthate, whose most important property is that it is soluble in diluted solutions of sodium hydroxide.
- the cellulose solution of one batch is mixed and homogenized with the one from the previous and the following batch, deaerated, and filtered to remove the impurities. Then the already cleared viscose solution, with required and strictly specified parameters, is fed under pressure to the spinning machines. Wet spinning is performed by passing the cellulose solution, by means of a dosing pump, through the spinneret holes into the spin bath, where as a result of the chemical reactions the cellulose from the cellulose solution transforms into fibers.
- the washed semi-finished product is then dried, conditioned, rewound and sent for quality control inspection and packaging as a finished product.
- an antibacterial additive which is usually a solution or suspension of the antibacterial substance(s) in water in the presence of specific amounts of equalizers, dispersing agents, wetting agents, softeners, and etc.
- Textile application through exhaust - can be applied to fabrics, especially the ones made only from synthetic fibers.
- This method also uses a bath in proportion 10:1 or less, at pH 4-8 and exhaust time of at least 30min. at a temperature of at least 80°C. The use of lower temperatures can significantly reduce the exhaust efficiency.
- the application of the antibacterial additive is also only on the surface of the woven or knitted fabric.
- the additional use of equalizers can contribute to the uniform distribution of the antibacterial additive across the entire surface treated.
- the antibacterial additive is absorbed partially, i.e. a big portion of it remains in the bath after treatment, as the same is then discharged into the waste water. Therefore, the use of these methods means higher expenses for waste water cleansing, as well as ecological problems.
- the disadvantage of this method is the complication of the other processes of viscose preparation - filtering, ripening and even spinning - due to the high concentration of inorganic particles in the viscose composition introduced too early - at the stage of mixing of the viscose solution with the antibacterial ceramic composition.
- the early introduction of the antibacterial ceramic additive requires separate flows of movement of the untreated and the mixed with the antibacterial component viscose to the spinning machines, i.e. they require separate flow-lines, if both types of rayon are produced simultaneously.
- An anion-carrying high molecular substance is homogeneously dispersed at 0,01 - 30 % in the viscose rayon and a quaternary ammonium salt compound of the formula Rl is a 8 - 30C saturated or unsaturated fatty acid residue, formula R2 is a 8 - 30C saturated or unsaturated fatty acid residue or CH3, didecil dimethyl ammonium chloride is held at 0,001 - 10 wt % on the surface of the viscose rayon.
- the fibres obtained by means of this method have the flaws as mentioned above, owing to the surface treatment itself of the already manufactured rayon.
- the antiseptic additive used is silver mixed with a cellulose sulfonic acid ester.
- the quantity of the silver is from 0.5% to 5.0% in relation to the weight of the cellulose. This method though is unacceptable for obtaining viscose fibres or rayon, as the silver from the additive reacts with the released during the spinning hydrogen sulphide to silver sulphide, which gives the product a grey shade.
- the purpose of the invention is to be suggested a manufacture method for raw bright white and coloured viscose rayon with the aforementioned antibacterial and antifungal properties.
- the method developed in accordance with the invention is based on existing classical process of spinning with the addition of more stages, in order to obtain a fibre in which the antibacterial additive is distributed uniformly through the entire volume and cross-section of the rayon.
- a much more lasting antibacterial and antifungal protection is achieved, without pollution of the waste water.
- a direct method for direct viscose rayon production with antibacterial properties is suggested, which consists of the following stages:
- the cellulose undergoes the so-called mercerization, being processing of the initial pulp with a concentrated solution of sodium hydroxide (NaOH), resulting in alkali cellulose, which afterwards is subjected to destruction, i.e. aging, where the degree of polymerization is decreased.
- This is followed by temperature reduction and dosing of the alkali cellulose amount for the production of one batch of viscose.
- the next stage is carbon-disulphide treatment which causes the alkali cellulose to transform into cellulose xanthate, whose most important property is that it is soluble in diluted solutions of sodium hydroxide.
- the cellulose solution of one batch is mixed and homogenized with the one from the previous and the following batch, deaerated, and filtered to remove the impurities. Then the already cleaned viscose solution, with strictly specified parameters, is fed under pressure to the respective number of spinning machines.
- the viscose is mixed with an antibacterial additive, homogenized and spun directly following the classical procedure, that is, the already cleared viscose solution, with strictly specified parameters, is fed under pressure to the spinning machines.
- Wet spinning is performed by passing the cellulose solution, by means of a dosing pump, through the spinneret holes into the spin bath, where as a result of the chemical reactions the cellulose from the cellulose solution transforms into fibers.
- a specified amount of antibacterial additive is added in the production of dope dyed viscose rayon to the preliminarily prepared pigment suspension, made of one or a couple of pigments. Then the required quantity of pigment and antibacterial additive mixed suspension is dosed into and mixed to homogenization with the viscose, in order the pigment particles and the antibacterial additive to be distributed uniformly through the whole volume of the already coloured solution.
- Wet spinning is performed by passing the already coloured and antibacterial-treated cellulose solution, by means of a dosing pump, through the spinneret holes into the spin bath, where as a result of the chemical reactions the cellulose from the cellulose solution transforms into fibers.
- the washed semi-finished product is then dried, conditioned, rewound and sent for quality control inspection and packaging as a finished product.
- the amount of the antibacterial additive is from 0.01 to 5% in relation to the cellulose quantity in the viscose solution, as in the case of utilization of the additive KW 48 this concentration is from 0.5 to 3.5%.
- the preparation of the antibacterial suspension and its storage are at temperatures ranging from +20°C to -4°C.
- the antibacterial suspension is filtered for removal of all particles exceeding the size of 5 microns.
- viscose rayon with antibacterial properties is obtained, which can be used for the production of any type of items, including products intended for medical use, as the antibacterial additive is distributed uniformly throughout the entire volume and cross-section of the rayon fibre, which suggests a significantly longer effect, and respectively more lasting antibacterial and antifungal protection.
- the antibacterial additive is 100% utilized and there are no residual and polluting the waste water quantities, which is extremely important from environmental point of view.
- the change of the stage where the antibacterial additive is used gives the possibility for the production of coloured antibacterial viscose rayon by preparing combined recipes for the production of colours, as the antibacterial additive becomes an integral component of the dyeing recipe.
- the combined pigment and antibacterial suspension is transported to a homogenizing tank and later into the cellulose solution following the innovative mode, and then it is directly subjected to spinning.
- Figure 1 illustrates the sequence of the processes of the manufacture of viscose rayon filament according classical technology of manufacturing
- Figure 2 presents dope dyed viscose rayon filament production (10-1) with and without the use of antibacterial additive.
- Figure 3 presents a detailed construction of an original centrifugal spinning machine.
- a chart presents the recipe for the preparation of the suspension with antibacterial additive, introduced in the cellulose solution in the homogenizer.
- the base cellulose is fed into unit 1 for mercerization - treatment of the initial pulp with a concentrated solution of sodium hydroxide (NaOH), resulting in alkali cellulose, which afterwards in unit 2 is subjected to destruction, i.e. aging, where the degree of polymerization is decreased.
- unit 3 temperature reduction takes place, and in unit 4 - dosing of the alkali cellulose amount for the production of one batch of viscose.
- unit 5 is introduced the next stage - carbon disulphide treatment of the alkali cellulose until obtaining cellulose xanthate, whose most important property is that it is soluble in sodium hydroxide diluted solutions.
- the solution of cellulose from one batch is mixed and homogenized with the one from the previous and the following batch, deaerated, and then filtered in unit 8 for removal of the impurities.
- the viscose solution with requires and strictly defined parameters is fed under pressure to the spinning machines 10 in a pipe collector 38 which is permanently full of cellulose solution under pressure for the prevention of incidence of a gas phase.
- This collector 38 provides the necessary quantity of cellulose solution to the spinneret for each working position of the rayon spinning machine 10 through the respective dosing pump 22 (Fig. 3). Passed through the spinneret 26 (Fig.3), the cellulose gets into a spin bath 11 where, as a result of the chemical reactions in course, the cellulose from the cellulose solution is transformed into rayon fibres. Leaving the bath the freshly-spun sour rayon is transported to the centrifuge 29 (Fig.3).
- the fibre between spinning devices 27 and 28 (Fig.3) is interrupted manually and wound on spinning device 27 only. During that period the centrifuge 29 is stopped, the formed in it rayon cake is taken out and the centrifuge is again put into operation. When the same enters in operating mode, the rayon fibre from spinning device 27 is again transferred to spinning device 28 from where it is led to the centrifuge 29, giving start to the production of the next rayon cake.
- the obtained semi-finished product is then dried, conditioned, rewound and sent for quality control inspection and packaging as a finished product - units 14, 15, 16, 17, 18 and after quality control inspection it is stored in unit 19.
- the spinning machine 10 is additionally equipped with an individual or multifunctional system for mass dyeing 10-1 (Fig.2).
- a preliminarily prepared pigment suspension, made of one or a couple of pigments, for one production cycle is transferred and stored in container 30 (Fig.2).
- the required amount of the suspension is dosed into the viscose, so the viscose and the pigments are mixed and homogenized in unit 32 (Fig.2), and as a result the pigment particles are uniformly distributed throughout the entire volume of the already coloured solution.
- the dyed and homogenized cellulose solution is then fed into a viscose pipe line 38 (Fig.2) of the spinning machine and passed through the spinnerets into the spin bath in the already described mode.
- the suspension of the antibacterial additive is prepared, i.e. 1.0% in relation to the amount of cellulose to be spun for 24 hours.
- the calculated quantity of additive is scaled and quantitatively transferred in the suspension preparation container where the required amount of water and other components of the recipe have already been weighted.
- the prepared suspension is transported to the container 30 of the individual installation for mass dyeing (Fig.2), after which the feed of the suspension to the homogenizer 32 from the suspension dosing pump 31 is set. This important setting is performed when the viscose pipe collector 38 is filled with the cellulose solution /viscose/ and deaerated. Further follows the spinning as above-described.
- the spinning of the viscose solution - antibacterial component complex is performed in the same spin bath, used for spinning of the same viscose solution without such an additive or of the same solution, dyed in mass.
- the freshly-spun sour antibacterial rayon passes through the processing to which rayon is subjected, spun through all the spinning machines, i.e. these operations are performed in accordance with the approved technological requirements and practice. These treatments include washings with softened water, neutralization with sodium carbonate, desulphoration and again washing with softened water.
- the drying and rewinding of the rayon cakes to bobbins with standard weight and size is carried out in the same way and parameters like the rest of rayon yarn manufactured in the classical mode.
- the only difference is that the rewinding of the antibacterial rayon is performed on separate rewinding machines in order not to mix it with the rest, and it sent to the quality control immediately, after which each bobbin of antibacterial rayon is wrapped in sterile packaging.
- the quality control inspection is performed in the same way as with the traditionally manufactured types of viscose rayon.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BG112429A BG67099B1 (en) | 2016-12-19 | 2016-12-19 | A method for the manufacturing of antibacterial viscosal artificial silk and a product obtained by this method |
PCT/BG2017/000034 WO2018112562A1 (en) | 2016-12-19 | 2017-12-18 | Method for the manufacture of antibacterial viscose filament rayon and a product obtained using that method |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3555349A1 true EP3555349A1 (en) | 2019-10-23 |
Family
ID=61005636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17832187.3A Pending EP3555349A1 (en) | 2016-12-19 | 2017-12-18 | Method for the manufacture of antibacterial viscose filament rayon and a product obtained using that method |
Country Status (4)
Country | Link |
---|---|
US (1) | US20200032423A1 (en) |
EP (1) | EP3555349A1 (en) |
BG (1) | BG67099B1 (en) |
WO (1) | WO2018112562A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4302859A3 (en) | 2015-12-18 | 2024-01-17 | Donaldson Company, Inc. | Filter cartridges and air cleaner assemblies |
BG67252B1 (en) * | 2017-06-27 | 2021-02-15 | Е.Миролио ЕАД | Method of obtaining a viscous artificial silk with variable thickness, a product obtained by this method and an installation for the implementation of the method |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2822174B2 (en) * | 1996-03-01 | 1998-11-11 | オーミケンシ株式会社 | Method for producing chitin chitosan fiber and structure |
CN101302661A (en) * | 2008-06-05 | 2008-11-12 | 江苏盛虹化纤有限公司 | Preparation of coloured antibiotic viscose fiber |
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 |
CN104514040B (en) * | 2014-10-21 | 2017-06-09 | 山东碧海标志服装有限公司 | A kind of preparation method of plant source coloured antibiotic viscose fiber |
-
2016
- 2016-12-19 BG BG112429A patent/BG67099B1/en unknown
-
2017
- 2017-12-18 US US16/469,219 patent/US20200032423A1/en not_active Abandoned
- 2017-12-18 WO PCT/BG2017/000034 patent/WO2018112562A1/en unknown
- 2017-12-18 EP EP17832187.3A patent/EP3555349A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
BG67099B1 (en) | 2020-06-30 |
US20200032423A1 (en) | 2020-01-30 |
BG112429A (en) | 2018-06-29 |
WO2018112562A1 (en) | 2018-06-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FI91778B (en) | Silica - containing product and method for its preparation | |
CN102965751B (en) | High-wet-modulus and flame-retardant regenerated cellulose fibers and preparation method thereof | |
CN103703176B (en) | High strength fibre element long filament, its purposes and its manufacture method | |
CZ282262B6 (en) | Process for producing elongated cellulose element by spinning of a cellulose in a solvent | |
EP0687313A1 (en) | Fibre | |
US20200032423A1 (en) | Method for the manufacture of antibacterial viscose filament rayon and a product obtained using that method | |
SU490297A3 (en) | The method of obtaining non-combustible cellulose fiber hydrate | |
EP3899113B1 (en) | Process for the treatment of lyocell fibres | |
RU2076164C1 (en) | Method of dyeing cellulose regenerated elongated member | |
CN113412350A (en) | Colored spun fiber and method for producing same | |
US2565832A (en) | Process for treating cellulose fibers and composition therefor | |
US20190360124A1 (en) | Method and installation for the production of viscose rayon directly dyed in mass in two colours simultaneously | |
US3297399A (en) | Process of mercerizing a cellulosic material while simultaneously depositing silica thereon | |
CN113755963B (en) | High-cleanliness viscose staple fiber for non-woven fabric and production method thereof | |
Yolacan | Effects of alkali pre-treatment on dye exhaustion, color values, color fastness, tensile and surface properties of lyocell yarns | |
EP4124680A1 (en) | Method for producing regenerated cellulosic fibers | |
WO2019186352A1 (en) | A process for preparing cationic regenerated cellulosic fibers | |
Ke et al. | Preparation of viscose/wool powder blended fibre and optimization of its acid dyeing | |
DE1469249A1 (en) | Preparing, finishing and antistatic finishing of textiles |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20190718 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20230828 |