EP2135984A1 - Procédé pour fabriquer un tissu non-tissé doux et absorbant - Google Patents

Procédé pour fabriquer un tissu non-tissé doux et absorbant Download PDF

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Publication number
EP2135984A1
EP2135984A1 EP08011164A EP08011164A EP2135984A1 EP 2135984 A1 EP2135984 A1 EP 2135984A1 EP 08011164 A EP08011164 A EP 08011164A EP 08011164 A EP08011164 A EP 08011164A EP 2135984 A1 EP2135984 A1 EP 2135984A1
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EP
European Patent Office
Prior art keywords
nonwoven
filaments
polymers
stretching
another
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Withdrawn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
EP08011164A
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German (de)
English (en)
Inventor
Rosaldo Fare
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Fare SpA
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Fare SpA
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Filing date
Publication date
Application filed by Fare SpA filed Critical Fare SpA
Priority to EP08011164A priority Critical patent/EP2135984A1/fr
Publication of EP2135984A1 publication Critical patent/EP2135984A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D04H3/03—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
    • 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
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
    • 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
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
    • D04H3/147—Composite yarns or filaments
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion

Definitions

  • the present invention relates to a process for the production of soft and absorbent nonwovens.
  • the present invention relates to a nonwoven of the spunbond type treated by stretching in such a manner as to reduce the weight thereof and make it softer, absorbent and voluminous.
  • Spunbond nonwovens are obtained by extrusion, stretching and depositing a plurality of filaments made of plastic material on a conveyer belt. The filaments deposited on the belt are then constrained to one another in a plurality of points, generally by bonding.
  • W02004104285 (2004 ) describes a process for biaxial stretching of nonwovens to obtain a product with improved softness, open pore ratio and flexibility.
  • Nonwovens that can be utilized are described as being principally those made of PP, both spun-bonded and melt-blown, nonwovens made of polyethylene/polypropylene bicomponents, formed by laminates of PP nonwovens and PE nonwovens bonded together, and PE, nylon, viscose and polyester nonwovens.
  • the object of the present invention is to improve the production processes of stretched nonwovens and to improve the quality and technical properties of stretched nonwovens, in particular their liquid absorption capacities.
  • This object is achieved by means of the present invention which relates to a process for the production of nonwovens by means of bi-oriented stretching of a nonwoven, characterized by comprising the steps of extruding filaments comprising two or more polymer components, formed of a first and of a second thermoplastic material differing from one another and such as to provide a final filament wherein said first and second material are not unitary with one another, and stretching the nonwoven thus obtained in at least one direction to impart different elongation deformations to said first and said second polymer material.
  • the polymers are incompatible with one another.
  • the bicomponent filament (or yarn) is of the skin/core type, the polymer with higher melting point forming the core.
  • the bicomponent filament is of the "side-by-side” and/or splittable type.
  • the stretch ratio is between 1:1.1 and 1:4; the stretching step is followed by a shrinking step of the stretched filaments that leads to a different configuration of the polymers In an embodiment, the stretching step is followed by a heat stabilization step, which allows controlled shrinkage of the filaments.
  • the nonwoven thus obtained and the system for obtaining it are also included in the invention.
  • the present invention presents numerous advantages with respect to prior art. Increased softness, volume and drapability of the nonwoven is obtained through mechanical reduction of the titer.
  • the calender to bond the filaments before they are stretched can operate at a lower speed than that required to produce nonwovens with the same titer but which are not stretched. By operating at a lower speed and with a higher thickness of nonwoven, the calender will require less maintenance and its performance will be improved.
  • the production capacity is higher, as machines that support the speed without any great problems and with modest power consumption are required downstream of the calender.
  • the process for the production of nonwovens by means of bi-oriented stretching of a nonwoven comprises the steps of coextruding from a spunbond device 2 a plurality of filaments 3 comprising two or more polymers A, B, such as to provide a final filament 3 wherein said two or more polymers are not unitary with one another, forming a nonwoven 4 by collecting said filaments on known means, such as a belt 5, constraining said filaments of said nonwoven to one another in a plurality of points, and stretching the nonwoven thus obtained in at least one direction to impart different elongation deformations to said first and said second polymer material.
  • the object is to make the nonwoven drapable, soft and voluminous; suitable nonwovens preferably have a weight between 8 g/m 2 and 350 g/m 2 .
  • the polymers A and B are coextruded by the device 2 in a manner known per se in the art and form, for example, skin/core filaments or side-by-side filaments (in which the polymers A and B are side-by-side) or also splittable filaments (with section in segments), or a mixture of these three types; figs. 4-6 schematically show the three types of filaments discussed above.
  • the device 2 comprises a polymer source A, a polymer source B and so on for each polymer to be used.
  • the polymers are sent to one or more dies from which they are extruded in bicomponent or multicomponent form.
  • Suitable polymers for the core portion of the filament are in particular: PET, PA, PP, PE, PLA.
  • Polymers suitable for the skin portion are, for example: PP, PE, LLDPE, HDPE, PET, PA, PLA also low melt polymers.
  • combinations core PET 95% - skin PE 5% or core PET 50% - skin PE 50% or PET-PP in the same or other proportions are used; the aforesaid ratios are in weight.
  • the polymers are joined in such a manner as to be different from one another, preferably incompatible with one another and in any case are such as to produce a filament that is not unitary; in other words, the filament obtained is composed of polymers A and B which present a contact surface 11.
  • the polymers adhere to one another but are not unitary, i.e. they behave substantially as a unitary filament, or as if they were cohered although they are not bonded on the surface 11, until the moment in which they are subjected to tensile stress during stretching.
  • the filaments collected on the belt 5 are conveyed to means for constraining, or "consolidating", the nonwoven.
  • These means are preferably composed of a calender 6 where the outer layers of skin of a plurality of filaments 3 are heat bonded to one another, in a plurality of constraining points 7 ( fig. 2 ).
  • other means to constrain the filaments are possible, such as water jets.
  • the nonwoven thus obtained therefore presents areas 7 in which the filaments are bonded and cannot be moved away from one another while the rest of the nonwoven is formed of filaments that move with respect to one another.
  • the bonding points 7 thus act as constraints with respect to movement of the fibres and, also during the stretching step, the filaments are not subject to dimensional variations at these bonding points 7.
  • Nonwovens of this type can be cold or hot stretched on rolls or in specific ovens or also with chains or with other apparatus that implies elongation of the nonwoven in CD and MD.
  • Fig. 1 schematically shows two different devices 8 and 9 that perform stretching of the bicomponent filament nonwoven. Suitable stretching means are hot rolls, chain ovens and are known in the art, for example from the aforesaid documents to which express reference is made for the stretching means.
  • Stretching is preferably followed by a heat treatment step (TT, ref. 10) to dimensionally stabilize the stretched nonwoven; in any case, it is preferable to subject the stretched nonwoven to a shrinking step, i.e. partial shrinkage of said filaments toward the initial conformation thereof; this shrinkage is controlled and can also be performed during the heat treatment of the nonwoven.
  • TT heat treatment step
  • the stretch ratio both in MD and CD, is between 1:1.1 and 1:4, more preferably between 1:1-1 and 1:2.
  • the polymers are chosen in such a manner as to form filaments that are initially cohered but not unitary: the skin polymer, during the bi-oriented stretch step, separates from the core polymer as the reciprocal adhesion forces between the polymers on the polymer-polymer interface 11 are insufficient to maintain the portions A and B of the filament adherent to one another. Consequently, the polymer A, for example the skin ( fig.4 ) is detached from the core and is able to "slide” or slip on the surface of the core polymer B. The latter is also subjected to tension, allowing the two polymers both to decrease in section between the heat bonded points 7 obtained in the calender, as can be seen in figs. 7 and 8 , which show the filament 3 as initially extruded ( fig.7 ) and during stretching ( fig. 8 ).
  • the filaments will have a smaller section than the initial section and will no longer be cohered as in the spinning step, as they are two different polymers and each has a different behaviour under tension and when tension is released.
  • the stretching process allows the titer of the yarn to be decreased in proportion to the stretch; for example, with a stretch ratio of 1:2 the titer of the portions of yarn between bonding or consolidation points 7, decreases by 50%.
  • the weight of the nonwoven does not decrease by 50% as the calendered bonding points 7 remain unstretched.
  • the filaments 3 being spun have a titer of 2 dtex and are stretched with a ratio of 1:2, the final titer of at least part thereof is 1 dtex.
  • the filaments composed of A/B skin A 50% / core B 50%
  • the two polymers A and B have different shrinkage, being composed of two different polymers with different behaviours under tension and create an increase in the volume of the nonwoven 4 as the filaments are no longer rectilinear, as schematized in figs. 9 and 10 .
  • These figures schematically show the behaviour of a filament 3 that is extended between two constraining, or bonding, points 7; the representation with dashed lines shows the condition of the bicomponent filament during tension, in the stretching step of the nonwoven, while the representation below with solid lines shows the same filament after shrinkage.
  • the polymers A and B are different, behave in different ways and being no longer cohered, as the stresses in the stretching step have released them from one another (see fig. 8 ), they move separately from one another and tend to form a nonwoven with a "three-dimensional" structure.
  • the amount of increase in volume of the nonwoven is partly dependent on the amount of shrinkage.
  • the amount of shrinkage is adjustable by varying the treatment temperature and the tension of the nonwoven.
  • the stretched nonwoven, left free (i.e. not subjected to tension) at ambient temperature presents a crimp effect, i.e. of basic or initial increase in volume, which can be increased and controlled by means of temperature and tension.
  • controlled shrinkage can be performed as follows.
  • the nonwoven After the stretching step of the nonwoven, it is fed, still in stretched condition and proceeding at a speed of 400 m/min, to a group of rolls heated to the temperature of 120°C.
  • the feed roll or rolls present a speed of 400 m/min, while the delivery roll or rolls present a speed of 360 meters per minute.
  • heating ovens such as the one indicated with the reference 10 in fig. 1 , can be utilized.
  • This different speed allows controlled shrinkage of the nonwoven aided by the temperature.
  • Shrinkage is mostly absorbed by the oriented (stretched) filaments of which the nonwoven is composed, which given their bicomponent structure shrink differently producing a three-dimensional crimp that determines the increase in volume.
  • This crimp effect i.e. increase in volume, is enhanced by the fact that the core B is not always perfectly positioned in the centre of the filament, often being moved to one side thereof. The same thing occurs for side-by-side and splittable yarns.
  • the process includes for the use of a stretch ratio that is such as to produce a plurality of filaments having a lacerated skin portion A and an integral core portion B.
  • the nonwoven thus obtained presents an improved softness and volume and above all a greater liquid absorption capacity.
  • a further embodiment of the invention also includes a step of applying means to the nonwoven to control the dimensions of the apertures between filaments.
  • means are, for example, chosen from melt-blown fibres, cellulose fibres and breathable films laminated to the stretched nonwoven in order to increase permeability and/or absorption power.
  • this invention translates into numerous advantages.
  • the process is more economically profitable, as approximately 20% less power is required with respect to production processes currently used in the market.
  • the step to form the web is easier, as a higher titer of the filaments is sufficient and this results in a decrease in the use of power during the spinning and forming step of the nonwoven.
  • the nonwoven increases in volume and greatly increases its liquid absorption power.
  • hydrophilic additive is added to the surface of each of the samples A, B and C, in the quantity of 0.4% in weight.
  • Products obtained with the present invention can be used in:
  • Flame retardant, anti dust mite, hydrophilic and UV-blocking additives can be applied to the skin of the filaments without being applied to the core of the filaments.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)
EP08011164A 2008-06-19 2008-06-19 Procédé pour fabriquer un tissu non-tissé doux et absorbant Withdrawn EP2135984A1 (fr)

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EP08011164A EP2135984A1 (fr) 2008-06-19 2008-06-19 Procédé pour fabriquer un tissu non-tissé doux et absorbant

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EP08011164A EP2135984A1 (fr) 2008-06-19 2008-06-19 Procédé pour fabriquer un tissu non-tissé doux et absorbant

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7892993B2 (en) 2003-06-19 2011-02-22 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8178199B2 (en) 2003-06-19 2012-05-15 Eastman Chemical Company Nonwovens produced from multicomponent fibers
US8216953B2 (en) 2003-06-19 2012-07-10 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8512519B2 (en) 2009-04-24 2013-08-20 Eastman Chemical Company Sulfopolyesters for paper strength and process
US8840757B2 (en) 2012-01-31 2014-09-23 Eastman Chemical Company Processes to produce short cut microfibers
US9273417B2 (en) 2010-10-21 2016-03-01 Eastman Chemical Company Wet-Laid process to produce a bound nonwoven article
US9303357B2 (en) 2013-04-19 2016-04-05 Eastman Chemical Company Paper and nonwoven articles comprising synthetic microfiber binders
US9598802B2 (en) 2013-12-17 2017-03-21 Eastman Chemical Company Ultrafiltration process for producing a sulfopolyester concentrate
US9605126B2 (en) 2013-12-17 2017-03-28 Eastman Chemical Company Ultrafiltration process for the recovery of concentrated sulfopolyester dispersion

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05186946A (ja) * 1991-12-30 1993-07-27 Unitika Ltd 極細繊維よりなる不織布の製造方法
US5296289A (en) 1992-04-29 1994-03-22 Collins Loren M Stretchable spun bonded nonwoven web and method
US5626571A (en) 1995-11-30 1997-05-06 The Procter & Gamble Company Absorbent articles having soft, strong nonwoven component
EP1443132A2 (fr) * 1998-08-03 2004-08-04 BBA Nonwovens Simpsonville, Inc. Non-tissé élastique à base de filaments à deux composants
WO2004104285A1 (fr) 2003-05-26 2004-12-02 Hanjin Printing & Chemical Co., Ltd Tissu non tissé à faible densité de fibres
EP1559822A1 (fr) * 2002-09-19 2005-08-03 Uni-Charm Co., Ltd. Textile non-tisse et procede permettant de le produire
JP2007100274A (ja) * 2005-10-07 2007-04-19 Chisso Corp 伸縮性不織布及びこれを用いた物品

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05186946A (ja) * 1991-12-30 1993-07-27 Unitika Ltd 極細繊維よりなる不織布の製造方法
US5296289A (en) 1992-04-29 1994-03-22 Collins Loren M Stretchable spun bonded nonwoven web and method
US5626571A (en) 1995-11-30 1997-05-06 The Procter & Gamble Company Absorbent articles having soft, strong nonwoven component
EP1443132A2 (fr) * 1998-08-03 2004-08-04 BBA Nonwovens Simpsonville, Inc. Non-tissé élastique à base de filaments à deux composants
EP1559822A1 (fr) * 2002-09-19 2005-08-03 Uni-Charm Co., Ltd. Textile non-tisse et procede permettant de le produire
WO2004104285A1 (fr) 2003-05-26 2004-12-02 Hanjin Printing & Chemical Co., Ltd Tissu non tissé à faible densité de fibres
JP2007100274A (ja) * 2005-10-07 2007-04-19 Chisso Corp 伸縮性不織布及びこれを用いた物品

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8435908B2 (en) 2003-06-19 2013-05-07 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8163385B2 (en) 2003-06-19 2012-04-24 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8158244B2 (en) 2003-06-19 2012-04-17 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8444895B2 (en) 2003-06-19 2013-05-21 Eastman Chemical Company Processes for making water-dispersible and multicomponent fibers from sulfopolyesters
US8178199B2 (en) 2003-06-19 2012-05-15 Eastman Chemical Company Nonwovens produced from multicomponent fibers
US8444896B2 (en) 2003-06-19 2013-05-21 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8227362B2 (en) 2003-06-19 2012-07-24 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8236713B2 (en) 2003-06-19 2012-08-07 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8247335B2 (en) 2003-06-19 2012-08-21 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8257628B2 (en) 2003-06-19 2012-09-04 Eastman Chemical Company Process of making water-dispersible multicomponent fibers from sulfopolyesters
US8262958B2 (en) 2003-06-19 2012-09-11 Eastman Chemical Company Process of making woven articles comprising water-dispersible multicomponent fibers
US8273451B2 (en) 2003-06-19 2012-09-25 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8277706B2 (en) 2003-06-19 2012-10-02 Eastman Chemical Company Process of making water-dispersible multicomponent fibers from sulfopolyesters
US8314041B2 (en) 2003-06-19 2012-11-20 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8388877B2 (en) 2003-06-19 2013-03-05 Eastman Chemical Company Process of making water-dispersible multicomponent fibers from sulfopolyesters
US8398907B2 (en) 2003-06-19 2013-03-19 Eastman Chemical Company Process of making water-dispersible multicomponent fibers from sulfopolyesters
US7892993B2 (en) 2003-06-19 2011-02-22 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8148278B2 (en) 2003-06-19 2012-04-03 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8216953B2 (en) 2003-06-19 2012-07-10 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8513147B2 (en) 2003-06-19 2013-08-20 Eastman Chemical Company Nonwovens produced from multicomponent fibers
US8691130B2 (en) 2003-06-19 2014-04-08 Eastman Chemical Company Process of making water-dispersible multicomponent fibers from sulfopolyesters
US8557374B2 (en) 2003-06-19 2013-10-15 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8623247B2 (en) 2003-06-19 2014-01-07 Eastman Chemical Company Process of making water-dispersible multicomponent fibers from sulfopolyesters
US8512519B2 (en) 2009-04-24 2013-08-20 Eastman Chemical Company Sulfopolyesters for paper strength and process
US9273417B2 (en) 2010-10-21 2016-03-01 Eastman Chemical Company Wet-Laid process to produce a bound nonwoven article
US8840757B2 (en) 2012-01-31 2014-09-23 Eastman Chemical Company Processes to produce short cut microfibers
US8840758B2 (en) 2012-01-31 2014-09-23 Eastman Chemical Company Processes to produce short cut microfibers
US8871052B2 (en) 2012-01-31 2014-10-28 Eastman Chemical Company Processes to produce short cut microfibers
US8882963B2 (en) 2012-01-31 2014-11-11 Eastman Chemical Company Processes to produce short cut microfibers
US8906200B2 (en) 2012-01-31 2014-12-09 Eastman Chemical Company Processes to produce short cut microfibers
US9175440B2 (en) 2012-01-31 2015-11-03 Eastman Chemical Company Processes to produce short-cut microfibers
US9303357B2 (en) 2013-04-19 2016-04-05 Eastman Chemical Company Paper and nonwoven articles comprising synthetic microfiber binders
US9617685B2 (en) 2013-04-19 2017-04-11 Eastman Chemical Company Process for making paper and nonwoven articles comprising synthetic microfiber binders
US9598802B2 (en) 2013-12-17 2017-03-21 Eastman Chemical Company Ultrafiltration process for producing a sulfopolyester concentrate
US9605126B2 (en) 2013-12-17 2017-03-28 Eastman Chemical Company Ultrafiltration process for the recovery of concentrated sulfopolyester dispersion

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