EP3467162A1 - Flame retardant lyocell filament - Google Patents

Flame retardant lyocell filament Download PDF

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Publication number
EP3467162A1
EP3467162A1 EP17001649.7A EP17001649A EP3467162A1 EP 3467162 A1 EP3467162 A1 EP 3467162A1 EP 17001649 A EP17001649 A EP 17001649A EP 3467162 A1 EP3467162 A1 EP 3467162A1
Authority
EP
European Patent Office
Prior art keywords
filament
flame retardant
filaments
spinning
lyocell
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.)
Withdrawn
Application number
EP17001649.7A
Other languages
German (de)
French (fr)
Inventor
Robert Malinowsky
Martin Neunteufel
Marina Crnoja-Cosic
Clemens Bisjak
Dieter Eichinger
Christoph Schrempf
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
Priority to EP17001649.7A priority Critical patent/EP3467162A1/en
Priority to TW107134533A priority patent/TWI780231B/en
Priority to CN201880064950.7A priority patent/CN111148864A/en
Priority to AU2018346452A priority patent/AU2018346452B2/en
Priority to KR1020207012692A priority patent/KR20200059291A/en
Priority to KR1020227017119A priority patent/KR20220071296A/en
Priority to RU2020114311A priority patent/RU2789193C2/en
Priority to EP18779722.0A priority patent/EP3692189A1/en
Priority to BR112020004363-0A priority patent/BR112020004363B1/en
Priority to PCT/EP2018/077295 priority patent/WO2019068927A1/en
Priority to PE2020000732A priority patent/PE20210233A1/en
Priority to US16/652,531 priority patent/US20200240043A1/en
Priority to JP2020519769A priority patent/JP2020536186A/en
Priority to MX2020003621A priority patent/MX2020003621A/en
Publication of EP3467162A1 publication Critical patent/EP3467162A1/en
Priority to US17/992,339 priority patent/US20230080038A1/en
Priority to JP2023090512A priority patent/JP2023101736A/en
Withdrawn legal-status Critical Current

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
    • D01F2/02—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
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/443—Heat-resistant, fireproof or flame-retardant yarns or threads
    • 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

Definitions

  • Comparative Examples 1 and 2 show that viscose and cupro filaments, even without added flame retardant agent do show completely unsatisfactory properties.
  • FR Lyocell filaments do display highly satisfactory properties, even though mechanical properties are somewhat lower, compared to Comparative Example 3, i.e. the non FR Lyocell filament.
  • the properties for the FR Lyocell filament in accordance with the present invention are significantly improved, as compared to the non FR viscose and cupro filaments.
  • the comparative examples using other types of cellulose filaments do suffer from a great imbalance of mechanical properties, so that no dimensionally stable products can be prepared for these filaments.
  • the flame retardant filaments of the present invention in addition to showing highly satisfactory flame retardant properties, also do show a great balance of mechanical properties.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Artificial Filaments (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Woven Fabrics (AREA)

Abstract

The invention relates to a filament having flame retardant properties, as well as methods for its preparation and its use. The filament according to the invention are Lyocell filaments.

Description

  • The invention relates to flame retardant lyocell filaments as well as a method for producing same and uses of the flame retardant filaments.
    • Background Art
  • Flame retardant fibers are used in a great variety of fields of applications, from technical fabrics to outerwear of clothing articles. While cellulosic fibers have long been used in these fields of application, cellulosic filaments, due to their reported unsatisfactory dimensional stability and low wet strength have not yet gained much attention and use in this field. The term filament as employed herein, defines, in accordance for example with BISFA (The International Bureau For The Standardization Of Man-Made Fibres) terminology (also the further terminology used in this specification and in the claims is as defined in the BISFA publication, see also below), a fibre of very great length considered as continuous (endless), which distinguishes filaments for shorter types of fibers, such as staple fibers, flocks . For such shorter types of fibers dimensional stability concerns as well as strength concerns are of lesser relevance, so that cellulosic staple fibers etc. have gained widespread use, also in versions containing additives, including flame retardants. However, for filaments concerns relating to dimensional stability and strength properties, in particular wet strength, are of greater concern. That is one of the reasons why cellulosic filaments, in particular flame retardant filaments have not yet found widespread use.
  • In the prior art, viscose, staple fibers have been prepared using flame retardants as additives. However, cellulosic filaments, such a viscose filaments, when being prepared with flame retardants, have not shown required properties, such as dimension stability as well as sufficient dry and wet strength. This is necessary in order to survive demanding textile processes like weaving and dyeing and finishing as well as achieving a proper textile performance in respect to shrinkage when washed or used when teared.
    • Object of the present invention
  • In view of the above problems, it is the object of the invention to provide a flame retardant filament (FR filament) which satisfies high quality standards with regard to strength and dimensional stability. The term flame retardant filament as employed herein defines a filament which is not merely coated with a flame retardant material but which incorporates the flame retardant in the matrix of the filament.
    • Brief description of the invention
  • This problem is solved according to the invention by a filament according to claim 1. Preferred embodiments are given in claims 2 to 5. The invention further provides a method according to claim 6, for which again preferred embodiments are given in claims 7 to 9. Finally the present invention provides the use according to claim 10 and the product according to claim 11, for which preferred embodiments are defined in claims 12 to 15. Further explanation is provided in the following description.
    • Detailed description of the invention
  • It has been found surprisingly that flame retardant lyocell filaments do overcome the shortcomings of the prior art and the perceptions and concerns in relation with flame retardant cellulosic filaments, such as viscose filaments. Lyocell filaments as describe herein surprisingly do show a highly satisfactory balance of properties and can reliably be prepared in the form of flame retardant filaments. These FR filaments have shown great promise for producing a variety of products, including filament yarns, as well as fabrics for protective clothing or e.g. fabrics or non-wovens for other technical applications produced from filaments and yarns in accordance with the present invention.
  • Lyocell fibers are well known in the art and the general methodology to produce same is for example disclosed in US 4,246,221 and in the BISFA (The International Bureau for the Standardization of Man-Made Fibers) publication "Terminology of Man-Made Fibres", 2009 edition. Both references are included herewith in their entirety by reference.
  • Reference is also made to WO 02/18682 A1 and WO 02/72929 A1 , which relate to a method for producing cellulose filament yarns, and are also included in their entirety.
  • As indicated above, the FR filament according to the present invention is a lyocell filament, i.e. a filament produced using the lyocell process. This process is well known to the skilled person and therefore is not further described herein in detail. The examples provide illustration for this process, as well as the patent literature described herein. The filament may have any desired linear density, with suitable values being in the range of from 0.6 and 4 dtex, with preferred values being in the range of from 0.8 to 2 dtex. The cellulose raw product employed for preparing the FR filament of the present invention is not critical, and any type of raw product suitable for the lyocell process may be employed.
  • As indicated above, the present invention is in particular characterized in that the novel and inventive FR filament does show a highly surprising balance of mechanical (strength/ tenacity) properties, in dry as well as in wet state, and in addition a very satisfactory dimensional stability. At the same time the desired flame retardancy can be obtained even in filaments without overly sacrificing mechanical properties. Strength properties which may be obtained in the filaments of the present invention are typically determined in conditioned state and for the FR filaments of the present invention these properties typically are as follows:
    • Average dry tenacity (FFk) of at least 22 cN/tex, The average dry elongation at break (FDk) of the filaments is at least 6 %, preferably between 6 % and 8 %. These properties are evaluated using the following test equipment and parameters:
      • Test apparatus: USTER® Tensorapid 4 2.4.2 UTR4/500N:
      • Test length: 500 mm
      • Clamp speed: 60 mm/min
      • Clamp pressure: 30 %
      • Pre-tension: 4,1 cN
  • Filaments in accordance with the present invention accordingly do show a favorable high dimensional stability, which benefits yarns and fabrics prepared therefrom. In this manner, high quality flame retardant products can be manufactured using the FR filament of the present invention.
  • As indicated above, the filaments of the present invention are FR filaments, i.e. filaments incorporating flame retardants. As the filaments of the present invention are lyocell filaments, the incorporation of the flame retardants may be achieved by including the flame retardant in a suitable manner into the spinning solution (or at least into the composition prior to spinning the filaments), as further illustrated in the Example contained herein. The type of flame retardant is not critical as long as it in particular can be included in the spinning solution or spinning composition, typically in the form of a solution of the flame retardant, preferably an aqueous solution. However, the flame retardant may also be included in form of a finely ground powder, or dispersion of such a finely ground powder. If such solid forms of flame retardants are to be employed, it is preferable that the average particle diameter of the flame retardant is at most 50% of the filament diameter, more preferably at most 30 %, even more preferably at most 10% of the filament diameter.
  • The amount of flame retardant in the final filament typically is in the range of from 2 to 50 wt.-% of the filament, preferably 10 to 40, even more preferably 15 to 30 wt.-%. This amount may be tailored according to need (for example in relation to the degree of flame retardancy desired) and can be adjusted by means of the ratio of cellulose and flame retardant in the spinning solution or spinning composition.
  • The type of flame retardant, as indicated above is not critical. Preferred however are flame retardants based on nitrogen and phosphorous containing compounds, such as those commercially available under the trademark Aflammit ®. In particular preferred are organic phosphourous compounds, such as Aflammit KWB. Any flame retardants employed may be subjected to pretreatments, such as milling, in order to obtain flame retardants having a particle size (if they are not soluble in the spinning composition) suitable for the spinning process, typically depending from the filament diameter aimed at. Such processes are known to the skilled person.
  • In one embodiment of the present invention a flame retardant being an oxidized condensate of a tetrakis hydroxyalkyl phosphonioum salt with ammonia and/or a nitrogenous compound which contains one or several amine groups is excluded
  • As outlined above, the FR filament according to the present invention is a lyocell filament. Accordingly the process for preparing a filament according to the present invention comprises the provision of a spinning solution comprising at least cellulose, water, NMMO and the flame retardant, and spinning the solution and regenerating the filaments in a manner known to the skilled person. In accordance with the present invention it has been determined that spinning velocities of about 250 to 750 m/min may be employed, such as from 300 to 600, preferable 350 to 450 m/min. During the process any further required additives and stabilizers, such as dyes and pigments etc. may be added as required.
  • The filaments may of course be subject to any usual post spinning processing, such as coating, finishing etc. A skilled person will be able to select appropriate processed depending on the intended use of the FR filaments.
  • The FR filaments according to the present invention may be used for producing further products, such as yarns, fabrics and non-wovens. Yarns may comprise varying numbers of the filaments of the present invention, suitable examples are from 10 to 200 filaments, such as from 15 to 150, and in embodiments from 25 to 100. Yarn titers may cover a broad range, depending from the intended field of use, and examples are titers in the range of from 30 to 150 denier, such as from 50 to 120 denier. Due to the unique balance of properties, such as high mechanical strength and rather low elongations at break, high quality products with a high dimensional stability may be prepared using the filaments of the present invention.
  • The FR filaments of the present invention may be used alone when producing further (textile) products, the filaments any however also be blended with other types of fiber, in order to generate filament mixture with a desired property profile. In particular it may be an option to blend the FR filaments of the present invention with other fibers if the intended product does not require a high degree of flame retardancy. Another option is to blend the FR filaments with high strength filaments if high strength fabrics are desired. In any case. The FR filament so for the present invention has shown to provide good properties, as explained above, also in blends with other types of fibers.
  • The following examples do illustrate the present invention.
    • Examples
  • The following examples demonstrate the superior properties of the FR Lyocell filament of the present invention compared with non flame retardant viscose, cupro and Lyocell filaments.
    • Example 1 shows the properties of an FR Lyocell filament in accordance with the present invention.
  • Comparative Examples 1 to 3 show the properties of a viscose filament, a cupro filament and a Lyocell filament, respectively, all not containing a flame retardant component.
  • The filaments according to the present invention according to Example 1 were generated as follows:
    • Pulp (cellulose) was impregnated with a 78 % watery N-methyl-morpholine-N-oxide (NMMO) solution, and low amounts of stabilizers. The resulting suspension contained 11.6 % cellulose, 68 % NMMO, 20.4 % water and stabilizer GPE. The pulp consisted of a mixture of sulfite and sulfate cellulose. A flame retardant (Aflammit KWB, suspension of 20% milled Aflammit KWB in 50% aqueous NMMO) was added to prepare the final spinning solution, excess water was removed form the slurry under shear and heating to obtain a fiber free spinning solution comprising 12.7% cellulose, 73.8% NMMO, 10.7% water, and 2.8% flame retardant (all % refer to the weight, based on the total composition).
  • The spinning solution was filtered and extruded at 114°C in a dry-wet process, wherein the spinning solution was extruded through nozzles into an air gap. For stabilizing the extrusion process, the air gap was provided with an air stream. Spinning velocity was 400 m/min.
  • After crossing the air gap, the cellulose precipitated in a spinning bath containing 10 % NMMO, the rest being water.
  • The endless filaments thus obtained were washed with water, impregnated with finish, dried and winded to a bobbin. Washing took place in fully de-salted water in counterflow. For drying, a contact dryer was used which reduced humidity to 10.5 %.
  • Using these filaments a multi-filament consisting of single filaments was generated. From the multi-filaments, untwisted filament yarn was manufactured. From the filament yarns fabrics may be produced. The linear density of the yarn produced was between 20 and 200 dtex, preferably between 50 and 150 dtex.
  • For other details of the manufacturing process, reference is made to US 4,246,221 , WO 02/18682 A1 and WO 02/72929 A1 .
  • The filaments comparative examples 1 to 3 were produced using conventional processes, the Lyocell filaments were produced using the experimental setup as described for Example 1, except for using no flame retardant component.
  • The respective properties are reported below:
    Example 1
    Material Lyocell filament (FR)
    Min dtex 1,36 dtex
    Max dtex 2,31 dtex
    FFk 33.2 cN/tex
    FFn 19.5 cN/tex
    Comparative Example 1 Comparative Example 2 Comparative Example 3
    material Viscose (Non FR) Cupro (Non FR) Lyocell Filament (Non FR)
    Min dtex 2.29 1.46 1.84
    Max dtex 3.02 1.92 3.92
    FFk cN/tex 21.1 18.7 40.9
    FFn cN/tex 9.2 10.6 27.3
  • Comparative Examples 1 and 2 show that viscose and cupro filaments, even without added flame retardant agent do show completely unsatisfactory properties. On the other hand, FR Lyocell filaments do display highly satisfactory properties, even though mechanical properties are somewhat lower, compared to Comparative Example 3, i.e. the non FR Lyocell filament. However, the properties for the FR Lyocell filament in accordance with the present invention are significantly improved, as compared to the non FR viscose and cupro filaments. The comparative examples using other types of cellulose filaments do suffer from a great imbalance of mechanical properties, so that no dimensionally stable products can be prepared for these filaments. At the same time the flame retardant filaments of the present invention, in addition to showing highly satisfactory flame retardant properties, also do show a great balance of mechanical properties.
    • Flame retardant Lining
  • From a yarn (den90/40 (multifilament with 40 filaments having a total titer of 90 denier), yarn titer dtex100f40), obtained by using the FR Lyocell filament of the present invention, a lining with 75 g/m2 was produced. This lining was used in an three-layer assembly, comprising a moisture barrier (Laminate, 148 g/m2, 50% Meta Aramid / 50% Lenzing FR (flame retardant viscose staple fiber)/PU membrane), an outer fabric (260 g/m2; 50% Lenzing FR, 38% Para Aramid, 12% PA) and the above identified lining (100% FR Lyocell filament) was evaluated in relation to flame retardancy. The three layer assembly passed the flame spread test according to EN ISO 15025: 2002 Procedure A (test flame to outer fabric as well as test flame to lining) and fulfilled all requirements according to EN 469 (EN 533 Index 3)

Claims (14)

  1. Flame retardant filament (FR filament), comprising a flame retardant and cellulose, characterized in that the filament is a lyocell filament.
  2. FR filament according to claim 1, having an average dry tenacity of at least 22 cN/tex.
  3. FR filament according to claim 1 or 2, having an average wet tenacity of at least 11 cN/tex.
  4. FR filament according to any one of claims 1 to 4, wherein the amount of flame retardant is form 2 to 50 wt.-%.
  5. Method for producing a FR filament according to any one of claims 1 to 4, comprising: providing a composition comprising pulp, NMMO, water and a flame retardant, and spinning the solution to produce filaments.
  6. Method according to claim 5, wherein the amount of flame retardant and pulp in the spinning solution is in the range of from 12 to 25% of the spinning solution.
  7. Method according to claim 5 and/or 6, wherein the spinning velocity is in the range of from 250 to 750 m/min.
  8. Method according to any one of claims 5 to 7, wherein the pulp comprises sulphite and sulphate cellulose.
  9. Use of the FR filament according to any one of claims 1 to 4 or produced according to any one of claims 5 to 8 for the preparation of yarn, fabrics and textile products.
  10. Yarn, fabric or textile product comprising the FR filament according to any one of claims 1 to 4 or produced according to any one of claims 5 to 8.
  11. Use or product according to any one of claims 9 or 10, wherein the FR filament is blended with other types of fibers.
  12. Use or product according to any one of claims 9 to 11, satisfying the demands according to EN ISO 14 116 classification "limited flame spread index 3" when tested according to EN ISO 15025:2002 Process B - edge flaming.
  13. Use or product according to any one of claims 9 to 12, being a multi filament yarn.
  14. Use or product according to any one of claims 9 to 13, wherein the FR filament comprises a resin finish.
EP17001649.7A 2017-10-06 2017-10-06 Flame retardant lyocell filament Withdrawn EP3467162A1 (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
EP17001649.7A EP3467162A1 (en) 2017-10-06 2017-10-06 Flame retardant lyocell filament
TW107134533A TWI780231B (en) 2017-10-06 2018-09-28 Flame retardant lyocell filament
EP18779722.0A EP3692189A1 (en) 2017-10-06 2018-10-08 Flame retardant lyocell filament
PCT/EP2018/077295 WO2019068927A1 (en) 2017-10-06 2018-10-08 Flame retardant lyocell filament
KR1020207012692A KR20200059291A (en) 2017-10-06 2018-10-08 Flame retardant lyocell filament
KR1020227017119A KR20220071296A (en) 2017-10-06 2018-10-08 Flame retardant lyocell filament
RU2020114311A RU2789193C2 (en) 2017-10-06 2018-10-08 Fire resistant lyocellic fiber
CN201880064950.7A CN111148864A (en) 2017-10-06 2018-10-08 Flame-retardant lyocell filament
BR112020004363-0A BR112020004363B1 (en) 2017-10-06 2018-10-08 LYOCELL FLAME RETARDANT FILAMENT, ITS PRODUCTION PROCESS AND ITS USE, AND YARN, FABRIC OR TEXTILE PRODUCT
AU2018346452A AU2018346452B2 (en) 2017-10-06 2018-10-08 Flame retardant Lyocell filament
PE2020000732A PE20210233A1 (en) 2017-10-06 2018-10-08 FLAME RETARDANT LYOCELL FILAMENT
US16/652,531 US20200240043A1 (en) 2017-10-06 2018-10-08 Flame retardant lyocell filament
JP2020519769A JP2020536186A (en) 2017-10-06 2018-10-08 Flame-retardant lyocell filament
MX2020003621A MX2020003621A (en) 2017-10-06 2018-10-08 Flame retardant lyocell filament.
US17/992,339 US20230080038A1 (en) 2017-10-06 2022-11-22 Flame retardant lyocell filament
JP2023090512A JP2023101736A (en) 2017-10-06 2023-05-31 Flame-retardant lyocell filament

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17001649.7A EP3467162A1 (en) 2017-10-06 2017-10-06 Flame retardant lyocell filament

Publications (1)

Publication Number Publication Date
EP3467162A1 true EP3467162A1 (en) 2019-04-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17001649.7A Withdrawn EP3467162A1 (en) 2017-10-06 2017-10-06 Flame retardant lyocell filament

Country Status (2)

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EP (1) EP3467162A1 (en)
TW (1) TWI780231B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113550063A (en) * 2021-07-14 2021-10-26 台州市黄岩喜金擦纱有限公司 Manufacturing process of packing paper of melt direct spinning strong polyester filament yarn

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246221A (en) 1979-03-02 1981-01-20 Akzona Incorporated Process for shaped cellulose article prepared from a solution containing cellulose dissolved in a tertiary amine N-oxide solvent
WO2002018682A1 (en) 2000-09-02 2002-03-07 Thüringisches Institut Für Textil - Und Kunststoff - Forschung E.V. Method for producing cellulose fibers and cellulose filament yarns
WO2002072929A1 (en) 2001-03-14 2002-09-19 Thüringisches Institut Fur Textil- Und Kunststoff-Forschung E.V. Method and device for the production of cellulose fibres and cellulose filament yarns
US20120156486A1 (en) * 2010-12-20 2012-06-21 Lenzing Ag Flame retardant cellulosic man-made fibers
US20130149932A1 (en) * 2010-05-06 2013-06-13 Lenzing Aktiengesellschaft Colored flame retardant shaped cellulosic article and products produced from it

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2488683B1 (en) * 2009-10-13 2018-08-29 Lenzing Aktiengesellschaft Flame barriers comprising flame-retardant lyocell fibers
RU2596738C9 (en) * 2010-09-23 2016-11-10 Инвиста Текнолоджиз С.А Р.Л. Fire-resistant fibre, yarn and fabric made therefrom

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246221A (en) 1979-03-02 1981-01-20 Akzona Incorporated Process for shaped cellulose article prepared from a solution containing cellulose dissolved in a tertiary amine N-oxide solvent
WO2002018682A1 (en) 2000-09-02 2002-03-07 Thüringisches Institut Für Textil - Und Kunststoff - Forschung E.V. Method for producing cellulose fibers and cellulose filament yarns
WO2002072929A1 (en) 2001-03-14 2002-09-19 Thüringisches Institut Fur Textil- Und Kunststoff-Forschung E.V. Method and device for the production of cellulose fibres and cellulose filament yarns
US20130149932A1 (en) * 2010-05-06 2013-06-13 Lenzing Aktiengesellschaft Colored flame retardant shaped cellulosic article and products produced from it
US20120156486A1 (en) * 2010-12-20 2012-06-21 Lenzing Ag Flame retardant cellulosic man-made fibers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113550063A (en) * 2021-07-14 2021-10-26 台州市黄岩喜金擦纱有限公司 Manufacturing process of packing paper of melt direct spinning strong polyester filament yarn
CN113550063B (en) * 2021-07-14 2022-08-19 台州市黄岩喜金擦纱有限公司 Manufacturing process of packing paper of melt direct spinning strong polyester filament yarn

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Publication number Publication date
TW201923178A (en) 2019-06-16
TWI780231B (en) 2022-10-11

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