|Número de publicación||USRE35621 E|
|Tipo de publicación||Concesión|
|Número de solicitud||US 08/473,917|
|Fecha de publicación||7 Oct 1997|
|Fecha de presentación||7 Jun 1995|
|Fecha de prioridad||30 May 1989|
|Número de publicación||08473917, 473917, US RE35621 E, US RE35621E, US-E-RE35621, USRE35621 E, USRE35621E|
|Inventores||A. Chandler Schmalz|
|Cesionario original||Hercules Incorporated|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (52), Otras citas (8), Citada por (16), Clasificaciones (21), Eventos legales (11)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
.Iadd.This application is a continuation of application Ser. No. 07/909,188, filed Jul. 6, 1992, now abandoned. .Iaddend.
The present invention relates to a method utilizing topically applied modifier compositions arranged in sequence and in a unique arrangement whereby polyolefin-containing hydrophobic fiber or filament is made receptive to interim cutting and carding operations without loss of hydrophobicity in the resulting fiber or nonwoven product.
While the manufacture of polyolefin-based fiber, webs and corresponding nonwoven materials are well known in the textile art, attempts to broadly apply such knowledge to produce products in the area of personal hygiene, such as catamenial devices, disposable diapers, incontinence pads and the like, have met with serious technical problems.
In general, such products must have a fluid-absorbent core, usually comprising one or more layers of absorbent material such as wood pulp, rayon, gauze, tissue and the like and, in some cases, synthetic hydrophilic material such as a hydrophilic polyurethane foam.
Such fluid-absorbing core is most generally fabricated in the form of a thermally bonded pad, of wood pulp, fiber and conjugate fiber, having a rectangular or somewhat oval shape. To protect a wearer's clothing, and surrounding areas from stain or wetting by fluids already absorbed in such a core, a fluid-impervious barrier sheet is usually required. In general, the absorbent device is positioned against the body of the user with hydrophilic material facing and contacting the body and the fluid impervious barrier sheet positioned on the outside or opposite side.
A particularly troublesome technical problem arises when a high degree of hydrophobicity is desired in a nonwoven component produced substantially from conventionally bonded webs of hydrophobic fiber such as polyolefin-containing staple or spun-bonded webs.
In general, untreated hydrophobic fiber quickly becomes unworkable due to friction and accumulated static charge generated during conventional spinning, cutting and carding operations. For this reason, the art has long recognized and used a variety of topically applied antistatic agents which change fiber surface properties sufficiently to permit such conventional fiber processing. In effect, however, such treatment also produces fiber, web and nonwoven product which is substantially more hydrophilic than the untreated spun fiber.
Because of the nature of commercial high speed operations, and the somewhat unpredictable affinity of such agents to individual batches or bales of hydrophobic fiber, it becomes very difficult to maintain adequate control over bonding steps and over the wetting characteristics of the final nonwoven product.
It is an object of the present invention to prepare a hydrophobic polyolefin-containing spun fiber or filament for processing such as intermediate cutting and carding steps without unduly interfering with subsequent bonding steps or sacrificing needed hydrophobic characteristics in the nonwoven product.
The above objects are obtained in accordance with the present invention by preparing polyolefin-containing spun fiber or filament in accordance with the steps of
A. initially treating the corresponding continuous spun fiber or filament with an effective amount, varying from about0.09%-0.5% based on fiber weight, of a first modifier composition comprising
(a) about 70%-100% by weight of modifier composition of at least one neutralized phosphoric acid ester represented by the formula ##STR1## wherein Alk is individually defined as a lower alkyl group, such as a 1-8 carbon alkyl and preferably a 1-4 carbon alkyl group;
R is defined as an amino group or an alkali metal,
n and m are individually defined as positive numbers of not less than about 1, the sum of which is about 3; and
(b) up to about 30% by weight of modifier composition of at least one polysiloxane represented by the formula ##STR2## wherein X and Y are individually defined as a hydrophobic chemical end group such as a lower alkyl group;
R' is individually defined as a lower alkyl such as a methyl group, and
o is defined as a positive number within the range of about 10-50 or higher;
B. crimping the resulting continuous fiber or filament in a crimper;
C. applying to said continuous fiber or filament preferably at a point proximate to said crimper an effective amount, varying from about 0.05%-0.20% by fiber weight, of a second modifier composition comprising
(a) about 70%-100%, by weight of second modifier composition, of at least one polysiloxane represented by formula (2), and
(b) up to about 30%, by weight of second modifier composition, of at least one neutralized phosphoric acid ester represented by formula (1);
D. processing the resulting modifier-treated continuous fiber or filament, for spun bonding or for staple web bonding purposes, to obtain position one or more webs for bonding; and
E. bonding the resulting web in a conventional manner to obtain a desired hydrophobic nonwoven material.
For present purposes the term "polyolefin-containing spun fiber or filament" includes continuous as well as staple melt spun fibers which are obtainable from conventionally blended isotactic polypropylene as well as art-recognized hydrophobic copolymers thereof with ethylene, 1-butene, 4-methylpentene-1 and the like. The resulting blended . .an.!. .Iadd.and .Iaddend.extruded spun melt conveniently has a weight average varying from about 3×105 to about 5×105, a molecular weight distribution of about 5.0-8.0, a melt flow rate of about 2.5 to about 4.0 g/10 minutes, and a spin temperature conveniently within a range of about 220° C.-300° C.
Also includible within the spun melt are various art-recognized fiber additives, including pH stabilizers such as calcium stearate, antioxidants, pigments, including whiteners and colorants such as TiO2 and the like. Generally such additives vary, in amount, from about 0.5%-3% by weight of spun melt.
The present invention is found particularly applicable to high speed production of a variety of nonwoven materials utilizing webs obtained, for instance, from spun bonded or carded staple and may also comprise additional web components such as . .fabricated.!. .Iadd.fibrillated .Iaddend.film and the like. In each case, the fiber-handling difficulties generated by friction and accumulated static charge can be avoided, without unacceptable sacrifice in bonding characteristics (i.e. strength) or loss of hydrophobic properties of the final nonwoven product.
In this regard, the term "processing" as applied in process step "D" is inclusive of art recognized web formation techniques applicable to continuous as well as crimped, cut and carded staple fiber, the crimping step in the former case being optional with respect to webs formed solely of fiber or filament.
Continuous spun fiber or filaments used to form webs within the scope of the present invention preferably comprise topically treated spun melt staple fiber, filament or fibrillated film of bicomponent or monofilament types, the above-defined modifier compositions being conventionally drawn over a feed wheel partially immersed in a bath of the above-defined modifier composition, dipped therein, or sprayed in effective amount for fiber processing, and dried.
For present purposes, webs used to form nonwovens within the scope of the present invention can be formed by spun bonded, melt blown or conventional "Dry" carded Process using staple fiber and bonded together using techniques employing adhesive binders (U.S. Pat. No. 4,535,013), calender rolls, hot air, sonic, laser, pressure bonding, needle punching and the like, known to the art.
Webs used to fabricate nonwoven material can also usefully comprise conventional sheath/core or side-by-side bicomponent fiber of filament, alone or combined with treated or untreated homogeneous type fiber or filament and/or fibrillated film.
Also within the scope of the present invention is the use of nonwovens comprised of one or more bonded webs of modifier-treated polyolefin fiber and/or fiber-like (fibrillated film) components having a mixed fiber denier of homogeneous and/or bicomponent types not exceeding about 40 dpf. Such webs preferably utilize fiber or filaments within a range of about 0.1-40 dpf.
In addition, the resulting nonwoven material can be embossed and/or calender printed conventionally with various designs and colors, as desired, to increase loft, augment wet strength, and provide easy market identification.
In addition, webs used in forming nonwovens within the scope of the present invention are produced from one or more types of conventionally spun fibers or filaments having, for instance, round, delta, . .trifocal.!. .Iadd.trilobal.Iaddend., or diamond cross sectional configurations.
Nonwoven cover stock of the above defined types can usefully vary in weight from about 10-45 gm yd2 or higher.
The invention is further illustrated but not limited by the following Examples and Tables:
A. Polypropylene in flake form and characterized as follows: (crystallinity 60% Mw 3.5×105, molecular weight distribution 6.4, and melt flow 3.2 g/10 minutes) is mixed in an impact blender. After thorough blending, the mixture is fed into a 11/2 extruder and spun through a 210 hole spinnerette at 280° C., air quenched, and stretched at 115° C. (4×) to obtain a 2 dpf circular filament which is then passed over a feed or kiss wheel partly immersed in a tank of first modifier composition consisting of a 50% aqueous solution of Lurol® AS-Y.sup.(*1), a neutralized phosphoric acid/alcohol ester, contact being of sufficient duration and speed to topically apply about 0.6 wt. % of the dried composition. The resulting continuous filament is crimped at about 100° C. and spray coated (0.10 wt %) with a second modifier composition consisting of a 20:1 mixture by weight of a 60% polydimethyl siloxane emulsion commercially available as LE-458HS.sup.(*2) and a 50% aqueous solution of Lurol AS-Y. After air drying, the coated 2.0 dpf fiber is chopped to 1.5" length staple and set aside for conventional ASTM Sink Time tests in which a given weight of fiber is loosely packed into a mesh basket and the sink time measured in seconds. The remainder is carded into webs weighing about 20 g/yd2, two webs being calender bonded at 162° C. to obtain test nonwoven material. The test nonwoven is cut into strips of convenient dimensions for carrying out conventional strength and run off tests using syn urine.sup.(*3) as the wetting fluid. Test results, are summarized and reported in Tables I and II.
TABLE I__________________________________________________________________________STAPLE PROPERTIESColor Degree of Percent Finish Tenacity Elongation Spin Fin. Over Fin.Sample #Type Hydrophobicity*4 MFR Tow Staple DPF gms % CPI Type/AMT Type/AMT__________________________________________________________________________S-1 195 5 17.6 0.77 0.41 2.6 2.05 308.7 28.9 263/0.6 262/0.3S-2 187 5 35.7 0.31 0.49 2.0 -- -- -- 263/0.2 262/0.3S-3 195 5 24.3 0.15 -- 2.2 263/0.2 262/0.15*5S-4 187 5 21.7 0.48 0.48 2.43 1.68 402.0 25.1 263/0.2 262/0.3Lt. BlueS-5 187 5 22.2 0.25 0.38 2.54 1.72 424.8 28.5 263/0.2 262/0.3Med. BlueS-6 195 5 21.0 0.5 0.53 2.28 1.91 375.1 26.0 263/0.4 262/0.3S-7 195 5 21.0 0.5 0.51 2.38 1.86 373.8 21.5 263/0.4 262/0.3*6S-8 195 5 21.0 0.5 0.48 2.45 2.10 411.4 22.8 263/0.4 262/0.3*7S-9 195 5 21.0 0.5 0.60 2.43 1.91 363.0 22.1 263/0.4 262/0.3*8S-10 195 5 21.0 0.5 0.61 2.50 1.93 361.5 20.5 263/0.4 262/0.3*9S-11 187 5 0.42 -- -- -- -- 30.8 263/0.4 262/0.3Lt. BlueS-12 187 5 0.45 -- -- -- -- 30.8 263/0.4 262/0.3Med. BlueS-13 195 5 22.3 0.35 0.4 2.42 1.87 273.9 27.5 263/0.4 262/0.15S-14 187 5 19.8 0.47 0.52 2.36 21.3 263/0.4 262/0.3BlueS-15 187 5 20.9 0.56 0.53 2.42 1.80 297.0 27.8 263/0.4 262/0.3Blue 225S-16 187 5 20.8 0.44 0.48 2.13 1.92 347.0 26.3 263/0.4 262/0.3Blue 275__________________________________________________________________________ *4 1 = Fully Hydrophilic 5 = Fully Hydrophobic based on Fiber Sink Test. *5 Added Finish No. 262 to tow with kim roll to reduce static. Total 262 addon not known. *6 Finish No. 262 + 0.08 Lurol ASY; *7 Extra (0.24) Lurol ASY: *8 Extra 0.32 Lurol ASY. *9 Extra 0.72 Lurol ASY
TABLE II__________________________________________________________________________THERMOBONDED WEBBond Bond Line Speed Strength g/in.*10 Elongation %*10 Run-Off Rewet Strike TimeStaple Temp. °C. Press. Pli ft./min. MD CD MD CD % gms. sec.__________________________________________________________________________S-1 165 160 250 930 271 43 86 98.3 *11 *11S-2 160 160 250 892 288 27 70 99.3 *11 *11S-3 157.5 160 100 1294 325 30 77 97.3 *11 *11S-4 160 160 250 1716 339 50 101 91.2 *11 *11S-5 155 160 100 1500 423 37 87 94.7 *11 *11S-6 155 160 100 1463 310 27 70 95.9 0.105 *11S-7 155 160 100 1345 292 27 76 95.0 0.120 *11S-8 155 160 100 1188 285 23 78 97.1 0.111 *11S-9 155 160 100 1325 255 28 70 94.1 0.102 *11S-10 155 160 100 1391 220 29 73 98.8 0.147 *11S-11 152.5 160 100 1244 257 31 71 93.0 *11 *11S-12 152.5 160 100 1389 294 37 80 95.2 *11 *11S-13 150 160 100 *12 *12 *12 *12 91.5 *11 *11S-14 157.5 160 100 1944 533 34 78 95.0 *11 *11S-15 157.5 160 -- *12 *12 *12 *12 94.9 *11 *11S-16 157.5 160 100 1347 392 26 80 >90.0 *11 *11__________________________________________________________________________ *10 20 g/yd2 Wet *11 Could not test. Solution remained on surface of fabric in Run Of Test (fully hydrophobic) *12 No determination run.
|Patente citada||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US3009830 *||15 Mar 1960||21 Nov 1961||Hercules Powder Co Ltd||Finishing polyolefin filamentary textile article and the article obtained therefrom|
|US3341451 *||1 Mar 1965||12 Sep 1967||Courtaulds Ltd||Textile processing agents|
|US3377181 *||19 Nov 1963||9 Abr 1968||Sanyo Chemical Ind Ltd||Method for producing webs including polypropylene fibers|
|US3423314 *||19 Ene 1966||21 Ene 1969||Dow Corning||Antistatic lubricant as a process finish for synthetic fibers|
|US3433008 *||19 Nov 1965||18 Mar 1969||Du Pont||Bulked yarn|
|US3544462 *||2 May 1967||1 Dic 1970||Du Pont||High temperature resistant textile fiber finish composition|
|US3652419 *||6 Mar 1968||28 Mar 1972||Witco Chemical Corp||Antistatic fiber lubricant|
|US3821021 *||29 Feb 1972||28 Jun 1974||Du Pont||Antistatically protected nonwoven polyolefin sheet|
|US3919097 *||6 Sep 1974||11 Nov 1975||Union Carbide Corp||Lubricant composition|
|US3926816 *||23 Jul 1973||16 Dic 1975||Goulston Co George A||Textile fiber lubricants|
|US3983272 *||24 Ene 1975||28 Sep 1976||Wacker-Chemie Gmbh||Method for improving the lubricating properties and imparting antistatic properties to organic fibers|
|US4058489 *||15 May 1975||15 Nov 1977||Berol Kemi Ab||Detergent composition having textile softening and antistatic effect|
|US4069159 *||2 Feb 1976||17 Ene 1978||E. I. Du Pont De Nemours And Company||Antistat and softener for textiles|
|US4069160 *||20 Ene 1975||17 Ene 1978||Hoechst Fibers Industries, Division Of American Hoechst Corporation||Texturing finish for synthetic filaments|
|US4072617 *||12 Abr 1976||7 Feb 1978||Dow Badische Company||Finish for acrylic fiber|
|US4082887 *||14 May 1976||4 Abr 1978||E. I. Du Pont De Nemours And Company||Coating composition for a fibrous nonwoven sheet of polyolefin|
|US4105567 *||4 Ene 1977||8 Ago 1978||Th. Goldschmidt Ag||Organosilicon compounds and textile fiber finishes containing them|
|US4105569 *||7 Feb 1977||8 Ago 1978||George A. Goulston Co., Ltd.||Yarn finish formulation|
|US4137181 *||22 Jul 1977||30 Ene 1979||Hoechst Fibers Industries||Staple fiber, finish therefor and process for use of same|
|US4143206 *||16 Sep 1977||6 Mar 1979||Ciba-Geigy Corporation||Method of finishing synthetic organic fibrous material, in particular of providing it with an antistatic finish|
|US4179543 *||19 Ago 1976||18 Dic 1979||Hoechst Fibers Industries, Division Of American Hoechst Corporation||Staple fiber, finish therefor and process for use of same|
|US4273600 *||26 Jul 1979||16 Jun 1981||Brown & Williamson Tobacco Corporation||Bonding fibrillated polypropylene smoke filter with ethylene-vinylacetate emulsion|
|US4283292 *||12 Dic 1979||11 Ago 1981||Allied Chemical Corporation||Soil resistant yarn finish for synthetic organic polymer yarn|
|US4285748 *||26 Dic 1979||25 Ago 1981||Fiber Industries, Inc.||Selfbonded nonwoven fabrics|
|US4291093 *||5 Oct 1979||22 Sep 1981||Phillips Petroleum Co.||Stabilized polyolefin substrate overcoated with an ethoxylated lubricant and a phosphate ester|
|US4294883 *||17 Ago 1979||13 Oct 1981||Hoechst Fibers Industries, Div. Of American Hoechst Corporation||Staple fiber, finish therefor and process for use of same|
|US4306929 *||1 Dic 1980||22 Dic 1981||Monsanto Company||Process for point-bonding organic fibers|
|US4369134 *||2 Feb 1981||18 Ene 1983||Kao Soap Co., Ltd.||Creamy cleansing compositions|
|US4423092 *||9 Dic 1981||27 Dic 1983||Wacker-Chemie Gmbh||Lubricating compositions for organic fibers|
|US4511489 *||1 Jun 1983||16 Abr 1985||The Drackett Company||Composition for cleaning and imparting antistatic properties to plastics surfaces|
|US4535013 *||15 Ago 1983||13 Ago 1985||Hercules Inc||Addition of resins to latex bonded nonwoven fabrics for improved strength|
|US4624793 *||20 Jun 1984||25 Nov 1986||National Distillers And Chemical Corporation||Fiber finishes|
|US4705704 *||12 Ene 1987||10 Nov 1987||General Electric Company||Novel aminofunctional polysiloxane emulsions for treating textiles|
|US4717507 *||5 May 1986||5 Ene 1988||Henkel Kommanditgesellschaft Auf Aktien||Liquid detergent with fabric softening properties|
|US4816336 *||2 Abr 1987||28 Mar 1989||Hoechst Celanese Corporation||Synthetic fiber having high neutralized alkyl phosphate ester finish level|
|US4837078 *||17 Dic 1987||6 Jun 1989||Hercules Incorporated||Wet/dry wipes|
|US4965301 *||7 Mar 1988||23 Oct 1990||Phillips Petroleum Company||Stabilization of polyolefins|
|US4995884 *||8 Dic 1989||26 Feb 1991||Henkel Corporation||Polyalphaolefin emulsions for fiber and textile applications|
|US5033172 *||1 Jun 1989||23 Jul 1991||Hercules Incorporated||Rewettable polyolefin fiber and corresponding nonwovens|
|US5045387 *||28 Jul 1989||3 Sep 1991||Hercules Incorporated||Rewettable polyolefin fiber and corresponding nonwovens|
|US5232742 *||15 May 1992||3 Ago 1993||Bridgestone/Firestone, Inc.||Spin finish composition|
|UST917002 *||15 Jun 1972||4 Dic 1973||Defensive publication|
|DE1494751A1 *||18 Jul 1964||30 Oct 1969||Toyo Rayon Co Ltd||Verfahren zum Vorspinnen von Polypropylenfasern|
|EP0010764A2 *||2 Nov 1979||14 May 1980||Phillips Petroleum Company||Polypropylene yarn product of improved stability and method for preparing a textile material|
|EP0400622A2 *||30 May 1990||5 Dic 1990||Hercules Incorporated||Rewettable polyolefin fiber and corresponding nonwovens|
|EP0486158A2 *||16 Oct 1991||20 May 1992||Hercules Incorporated||Cardable hydrophobic polyolefin fiber, material and method for preparation thereof|
|FR2259938A1 *||Título no disponible|
|FR2351152A1 *||Título no disponible|
|GB828735A *||Título no disponible|
|GB999199A *||Título no disponible|
|GB1246134A *||Título no disponible|
|GB1533359A *||Título no disponible|
|1||*||Derwent Abstract of JP 82 002828.|
|2||*||Derwent Abstract of JP 87 047989.|
|3||*||Derwent Abstract of JP 87 052072.|
|4||George A. Goulston Company, Technical Data Report, entitled "Lurostat AS-Y Anionic Antistatic Agent".|
|5||*||George A. Goulston Company, Technical Data Report, entitled Lurostat AS Y Anionic Antistatic Agent .|
|6||*||Kirk Othmer, Encyclopedia of Chemical Technology, Third Edition, vol. 22, 1983 (John Wiley & Sons) pp. 359 361.|
|7||Kirk-Othmer, Encyclopedia of Chemical Technology, Third Edition, vol. 22, 1983 (John Wiley & Sons) pp. 359-361.|
|8||*||Zimmerman et al., Supplement IV to the 1953 Edition of Handbook of Material Trade Names, p. 126.|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US6296936||30 Ene 1998||2 Oct 2001||Kimberly-Clark Worldwide, Inc.||Coform material having improved fluid handling and method for producing|
|US6300258||27 Ago 1999||9 Oct 2001||Kimberly-Clark Worldwide, Inc.||Nonwovens treated with surfactants having high polydispersities|
|US6432270||20 Feb 2001||13 Ago 2002||Kimberly-Clark Worldwide, Inc.||Soft absorbent tissue|
|US6511580||15 Nov 2001||28 Ene 2003||Kimberly-Clark Worldwide, Inc.||Soft absorbent tissue containing derivitized amino-functional polysiloxanes|
|US6514383||15 Nov 2001||4 Feb 2003||Kimberly-Clark Worldwide, Inc.||Soft absorbent tissue containing derivitized amino-functional polysiloxanes|
|US6576087||15 Nov 2001||10 Jun 2003||Kimberly-Clark Worldwide, Inc.||Soft absorbent tissue containing polysiloxanes|
|US6582558||15 Nov 2001||24 Jun 2003||Kimberly-Clark Worldwide, Inc.||Soft absorbent tissue containing hydrophilic polysiloxanes|
|US6599393||15 Nov 2001||29 Jul 2003||Kimberly-Clark Worldwide, Inc.||Soft absorbent tissue containing hydrophilically-modified amino-functional polysiloxanes|
|US6682672||28 Jun 2002||27 Ene 2004||Hercules Incorporated||Process for making polymeric fiber|
|US7438777||1 Abr 2005||21 Oct 2008||North Carolina State University||Lightweight high-tensile, high-tear strength bicomponent nonwoven fabrics|
|US7883772||28 Jun 2007||8 Feb 2011||North Carolina State University||High strength, durable fabrics produced by fibrillating multilobal fibers|
|US7935645||26 Sep 2008||3 May 2011||North Carolina State University||Lightweight high-tensile, high-tear strength biocomponent nonwoven fabrics|
|US7981226||23 Jun 2006||19 Jul 2011||North Carolina State University||High strength, durable micro and nano-fiber fabrics produced by fibrillating bicomponent islands in the sea fibers|
|US8420556||24 Jun 2011||16 Abr 2013||North Carolina State University||High strength, durable micro and nano-fiber fabrics produced by fibrillating bicomponent islands in the sea fibers|
|US20060223405 *||1 Abr 2005||5 Oct 2006||Behnam Pourdeyhimi||Lightweight high-tensile, high-tear strength bicomponent nonwoven fabrics|
|US20060292355 *||23 Jun 2006||28 Dic 2006||North Carolina State University||High strength, durable micro & nano-fiber fabrics produced by fibrillating bicomponent islands in the sea fibers|
|Clasificación de EE.UU.||156/308.8, 428/391, 442/359, 427/393.1, 252/8.81, 156/296, 428/369, 156/305, 524/274|
|Clasificación internacional||D06M13/292, D06M15/643|
|Clasificación cooperativa||Y10T442/635, Y10T428/2962, D06M13/292, D06M7/00, Y10T428/2922, D06M2200/40, D06M15/643|
|Clasificación europea||D06M7/00, D06M13/292, D06M15/643|
|9 Jul 1997||AS||Assignment|
Owner name: FIBERCO, INC., DELAWARE
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Year of fee payment: 12
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