WO1993006269A1 - Amelioration apportee aux fibres polyester dispersibles dans l'eau - Google Patents

Amelioration apportee aux fibres polyester dispersibles dans l'eau Download PDF

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Publication number
WO1993006269A1
WO1993006269A1 PCT/US1991/006499 US9106499W WO9306269A1 WO 1993006269 A1 WO1993006269 A1 WO 1993006269A1 US 9106499 W US9106499 W US 9106499W WO 9306269 A1 WO9306269 A1 WO 9306269A1
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WO
WIPO (PCT)
Prior art keywords
water
fiber
polyester
coating
filaments
Prior art date
Application number
PCT/US1991/006499
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English (en)
Inventor
Teddy Hodge Grindstaff
Donald Albert Shiffler
Original Assignee
E.I. Du Pont De Nemours And Company
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 E.I. Du Pont De Nemours And Company filed Critical E.I. Du Pont De Nemours And Company
Priority to PCT/US1991/006499 priority Critical patent/WO1993006269A1/fr
Publication of WO1993006269A1 publication Critical patent/WO1993006269A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/24—Polyesters
    • 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
    • D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
    • D01F11/04—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers
    • D01F11/08—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • 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
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
    • D01F6/84—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from copolyesters
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic System
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/507—Polyesters
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/53—Polyethers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M7/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made of other substances with subsequent freeing of the treated goods from the treating medium, e.g. swelling, e.g. polyolefins
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/40—Reduced friction resistance, lubricant properties; Sizing compositions

Definitions

  • This invention concerns improvements in and relating to water-di ⁇ persible polyester fibers of various types and particularly their preparation.
  • water-dispersible polyester fiber is used in various non-woven applications, including paper-making and wet-laid non-woven fabrics, sometimes as part of a blend, often with large amounts of wood pulp, e.g. for paper-making, and/or with other synthetic fibers, such as fiberglass, but also in applications requiring only polyester fiber, i.e. unblended with other fiber.
  • This use, and the requirements therefor, are entirely different from previous more conventional use- as tow or staple (cut fiber) for conversion into textile yarns for eventual use in woven or knitted fabrics, because of the need to disperse this fiber in water instead of to convert the conventional textile fiber into textile yarns, e.g.
  • water-dispersible polyester fiber is of poly( ethylene terephthalate ) , and is prepared in essentially the same general way as conventional textile polyester staple fiber, except that most water-dispersible polyester fiber is not crimped, whereas any polyester staple fiber for use in textile yarns is generally crimped while in the form of tow, before conversion into staple fiber.
  • water- -di ⁇ persible polyester fiber has generally been prepared by melt-spinning (i.e.
  • extruding molten polyester ⁇ into a bundle of filaments applying a ⁇ pin-finish, combining the filaments to form a tow, drawing, applying a suitable coating to impart water-dispersing properties, preferably during the drawing operation, relaxing the drawn filaments at a temperature of 100 to 180 ⁇ C, thereby preferably curing a preferred water-dispersing coating onto the filaments, and then, generally without any crimping (or with imparting only some mild wavy undulations in some cases so that the final sheet made therefrom has extra bulk and a three-dimensional matrix), converting the tow into cut fiber of appropriately short length.
  • Some prior polyester staple fiber has been prepared in uncri ped form, e.g.
  • Polyester fibers are naturally hydrophobic, as reported, e.g. by Ludewig in Section 11.1.5 on pages 377-378 of "Polyester Fibres-rChemi ⁇ try and Technology" - English Tran ⁇ lation 1971 - John Wiley and Sons, Ltd., which has posed a problem in regard to their suitability for ? wet-laying processes, as disclosed by Ring et al. in U.S. Patent No. 4 r 007,083, Hawkins in U.S. Patent Nos. 4,137,181, 4,179,543 and 4,294,883, and Viscose Sui ⁇ se in British Patent No. 958,430.
  • binder fibers in certain wet-laid products, but this has posed difficulties becau ⁇ e we have found that preferred binder fibers have al ⁇ o been more difficult to disperse than regular polyester fibers, which are generally of poly(ethylene terephthalate) , whereas preferred binder fibers are copolymers of lower melting point with comonomer residues such as i ⁇ ophthalate ⁇ , e.g. of about 210°C or less.
  • U.K. Patent No. 1,276,329 (Eastman Kodak) concerns a paper product reinforced with hydrophilic water-di ⁇ per ⁇ ible polyester fibers, the surfaces of which have been substantially hydrolyzed.
  • the polyester fiber surfaces are treated with dilute alkali solution to achieve sub ⁇ tantial saponification or hydroly ⁇ i ⁇ to improve their di ⁇ per ⁇ ibility, ⁇ o that they can be dispersed without the aid of wetting agents.
  • the polyester tow is preferably drafted in a water bath containing sodium hydroxide (at 68 ⁇ C in Example 4) and steamed (at 150 ⁇ C in Example 4) to effect the surface treatment. This process has serious processing disadvantages and is believed not to solve the problem. It does not teach the use of any water-dispersing coating.
  • an improvement in a proce ⁇ for preparing water-dispersible fiber comprising the ⁇ tep ⁇ of melt-spinning polyester into filaments coating the freshly-extruded filaments with a spin-finish and collecting them in the form of a bundle, and further proces ⁇ ing such bundle in the form of a tow, applying a water-dispersing coating, drawing and possibly annealing to increase orientation and cry ⁇ tallinity, and converting such drawn filaments into cut fiber, the improvement characterized by treating the freshly-extruded polyester filaments with a small amount of caustic, in sufficient amount and sufficiently rapidly so a ⁇ to modify the surface of the polyester, so as to become hydrophilic, when washed.
  • the resulting new and improved water-dispersible polyester fiber having a hydrophilic surface is also provided, according to other embodiments of the invention, as are the precursor tows and process for their preparation.
  • polyester hydrophobic surface For convenience, despite the fact that the characteristic polyester hydrophobic surface has been changed, I shall refer to both treated and untreated materials by the term "polyester".
  • the preparation of the water-dispersible polyester fiber may be carried out conventionally, as de ⁇ cribed hereinbefore, except for the application of cau ⁇ tic ⁇ oda to the fre ⁇ hly-extruded filaments.
  • Such polyester fiber is generally prepared first in the form of a continuous filamentary uncriroped tow or, if extra bulk is required, and a more three-dimensional matrix, the filaments may be provided with mild wave-like undulations by a mild crimping-type process, and the uncrimped or mildly wave-like filaments are cut to the desired cut length, i.e. to form the water-dispersible fiber, which is generally ⁇ old in the form of bales, or other packages of cut fiber.
  • Suitable cut lengths are generally from about 5 to about 60 mm (1/4 to 2-1/2 inches), and of length/diameter (L/D) ratio from about
  • a ⁇ uitable denier per filament i ⁇ generally from about 0.5 to about 20, it being a ⁇ pecial advantage of the invention that lower denier fiber ⁇ of about 0.5 to about 1.2 may be rendered water-dispersible more easily than by certain prior art methods that have been used or attempted commercially.
  • the coating is generally present in amount about 0.04 to about 1.0% of the weight of fiber (OWF%).
  • this conventional process is modified by treating the freshly-extruded filaments with caustic.
  • this i ⁇ most conveniently effected by adding an appropriate amount of cau ⁇ tic ⁇ oda to the spin-finish that is applied to the freshly-extruded filaments, since the application of finish i ⁇ essentially the first treatment or contact that the fre ⁇ hly-extruded filaments encounter after solidification.
  • the finish i ⁇ generally applied by a finish roll, rotating in a bath of the finish, so that the filaments pass through the finish emulsion as they brush past the finish roll on their way from the solidification zone to the feed roll that determines the withdrawal speed from the spinneret.
  • the finish roll Before the finish roll, it i ⁇ generally de ⁇ irable to avoid or minimize contact between the filament ⁇ and ⁇ olid objects, and so the only other clo ⁇ ely-adjoining ⁇ olid objects are generally guides that are intended to confine the filament ⁇ before contacting the fini ⁇ h roll.
  • a finish roll is not the only method of applying finish, and other methods have been used and suggested, including spraying or metering the fini ⁇ h onto the filament ⁇ .
  • One way to measure the effectivene ⁇ of the treatment according to the invention may prove to be by measuring the Carboxyl Equivalent (CE) of the ⁇ urface on the weight of the drawn fiber, ⁇ ince the improved water-dispersibility may correlate with at lea ⁇ t a threshhold value of ⁇ uch surface carboxyl equivalents, i.e. carboxyl groups on the surface of the filament or fiber.
  • CE Carboxyl Equivalent
  • the core appear ⁇ to be relatively unchanged from regular polye ⁇ ter polymer, wherea ⁇ the ⁇ urface ha ⁇ been ⁇ ignificantly changed ⁇ o that the fiber surface shows a hydrophilic nature. Since the treatment i ⁇ applied to the surface of the f eshly-extruded filament, which is undrawn, and this filament is then subjected to a drawing proces ⁇ , in which the ⁇ urface of the filament is significantly increased, which must mean that new ⁇ urface is created from polymer that had previously been concealed beneath the ⁇ urface of the undrawn filament, it i ⁇ extremely ⁇ urpri ⁇ ing that any difference i ⁇ shown in the water-di ⁇ per ⁇ ible fiber, which ha ⁇ been drawn. Indeed, we have found that CE value ⁇ can be higher for drawn filaments than for undrawn filaments.
  • EXAMPLE 1 The following fibers (Fibers E, L, M, N and P) were all spun from poly(ethylene terephthalate ) of intrinsic viscosity 0.64, containing 0.3% Ti0 2 as a delusterant.
  • Fiber E wa ⁇ ⁇ pun u ⁇ ing a 900-hole spinneret with round holes 0.015 inches in diameter and a capillary length of 0.030 inche ⁇ .
  • the spinneret wa ⁇ ⁇ urrounded by a 270°C block, polymer throughput wa ⁇ 47.6 pounds/hour, and the filament ⁇ were collected on bobbins at 1600 yards per minute. Denier per filament wa ⁇ approximately 2.5.
  • Fiber E was then oriented by running from a set of feed rolls at 25.9 yards/minute to first draw rolls running at 69.6 yards per minute. Between roll sets, it was washed with water at 45 ⁇ C to remove spin-finish and condition the fibers. It wa ⁇ next run to the second draw rolls running at 80.2 yard ⁇ /minute. Between first draw and second draw rolls, the fiber was washed with water at 98 ⁇ C. Fiber E was then annealed on a set of 6 rolls running 80.1 yards/minute having a temperature of 190 ⁇ C. A water-dispersing finish was sprayed on the fiber, and it was delivered to a conveyer at 78.2 yard ⁇ /minute by a ⁇ et of puller roll ⁇ . It wa ⁇ then dried at 70 ⁇ C for 6 minutes.
  • Fibers L, H and N were spun using essentially the same conditions, except that 1.0% by weight of NaOH was added to the ⁇ pin-fini ⁇ h, the ⁇ pinning ⁇ peed wa ⁇ 1200 yards/minute, and positional throughput and ⁇ pun denier were a ⁇ follow ⁇ : FIBER
  • Fibers L, M, N and P were then oriented using a proce ⁇ involving ⁇ uperdrawing.
  • the fibers were first pa ⁇ ed over a ⁇ et of ⁇ uperdraw rolls running at the speed ⁇ indicated below, the fibers were washed and heat treated in a water bath at 98 ⁇ C, and run to a set of feed rolls at the speed ⁇ indicated below.
  • the fibers were washed with water at 45 ⁇ C and fed to a ⁇ et of draw roll ⁇ running at the speeds indicated below.
  • a water-disper ⁇ ing fini ⁇ h was applied, the fiber was delivered to a conveyer by a set of puller roll ⁇ running at approximately the draw roll speed, and relaxed at 150°C for 6 minutes.
  • Fibers were cut into samples of 1/4-inch and 3/8-inch length and were treated in an experimental inclined wire Fourdrinier machine. Fibers were dispersed for six minutes in a small pulper as described in Example 1. Fibers were then mixed with unrefined sulphite pulp to form an 80% polyester blend and proces ⁇ ed into fabric ⁇ with a fini ⁇ hed fabric weight averaging 40 gram ⁇ / ⁇ quare meter, a ⁇ described in Example 1.
  • the water-dispersing coating u ⁇ ed in the Example was the same a ⁇ u ⁇ ed in the Examples of U.S. Patent No. 4,707,407 (Clark and Shiffler), but any of the other water-dispersing coatings mentioned therein may be used, as indicated therein, ⁇ o our copending application is hereby incorporated by reference herein.
  • the coating especially a synthetic copolye ⁇ ter of poly(ethylene terephthalate) units and poly(oxyalkylene ) groups as described, is preferably cured on the filaments by heating the coated filaments, or the resulting staple fiber, if desired, to a temperature of about 100° to about 190°, and thi ⁇ normally occur ⁇ during relaxing after drawing.
  • the spinneret was surrounded by a 277 ⁇ C block and polymer throughput wa ⁇ 61.2 pound ⁇ /hour.
  • Sixteen (16) ends (a total of 16480 filament ⁇ ) were combined and fed into a large can or tub at 1600 yard ⁇ /minute. Denier per filament wa ⁇ approximately 2.7.
  • Fiber A wa ⁇ then oriented by combining a total of 32 end ⁇ (32960 filament ⁇ ) to form a tow and running from a ⁇ et of feed roll ⁇ 30.8 yard ⁇ /minute to draw and puller roll ⁇ at 80.4 yard ⁇ /minute. Between feed and draw rolls, spin fini ⁇ h wa ⁇ washed from the fiber by water at 45 ⁇ C. Between draw and puller rolls, a water spray at 90 ⁇ C provided additional wa ⁇ hing. Between draw and puller roll ⁇ a commercial water-di ⁇ per ⁇ ing fini ⁇ h was applied to the fiber. The tow wa ⁇ then relaxed free in an oven at 120°C for 6 minutes.
  • the resulting Fiber A had the following properties: o 1.58 denier/filament o 0.68% water-di ⁇ per ⁇ ing finish (solids) on fiber o 1.9% boil-off ⁇ hrinkage o 15.2% dry heat ⁇ hrinkage at 150°C o Tenacity at break of 2.6 gram ⁇ /denier o Elongation at break of 64% o Tenacity at 2% elongation of 0.58 grams/denier
  • Fiber Q wa ⁇ produced in a ⁇ imilar manner to Item
  • the re ⁇ ulting Fiber Q had the following properties: o 1.50 denier/filament o 0.54% by weight water-dispersing fini ⁇ h on tow o 3.1% boil-off shrinkage o 14.9% dry heat shrinkage at 150°C o Tenacity at break 2.9 gram ⁇ /denier o Elongation at break 66% ,5 o Tenacity at 2% elongation 0.62 grams/denier
  • Fibers were cut into ⁇ ample ⁇ of 1/2-inch length and were tested in an experimental inclined wire Fourdrinier machine. Fibers were dispersed for two minute ⁇ in a ⁇ mall pulper at 0.99% con ⁇ i ⁇ tency (lbs. fiber 0 per 100 lb ⁇ . slurry, or furnish). The cylindrical pulper was approximately 2 feet in diameter by 6 feet deep. Fibers were then mixed with unrefined ⁇ ulphite pulp to form 50% and 80% polye ⁇ ter blend ⁇ , which were diluted to 0.1% con ⁇ i ⁇ tency in aa 10-cubic meter ⁇ tock tank, or che ⁇ t.
  • Thi ⁇ ⁇ tock wa ⁇ further diluted in the headbox of the machine to 0.016% con ⁇ i ⁇ tency and formed into a 0.5 meter wide, wet-lay nonwoven fabric at 20 meters/minute.
  • the fabric wa ⁇ then 0 cured in a through air drier at 125 ⁇ C. Fini ⁇ hed fabric weight averaged 40 gram ⁇ / ⁇ quare meter.
  • thi ⁇ fiber i ⁇ intended for thermal bonding in which heat to ca. 170°C or above and pre ⁇ ure take the place of the chemical binder.
  • Log ⁇ are hard agglomerates of undi ⁇ per ⁇ ed fiber ⁇ representing a severe quality defect which are especially common in binder fibers because of their low melting point. Log performance of the fiber ⁇ wa ⁇ assessed at the Fourdrinier machine with the following results: 5 -16-
  • polyester fibers are generally added to wood pulp papers as reinforcement (to increase tear strength), but we have found that other properties ( ⁇ uch a ⁇ tenacity, elongation, work-to-break and Mullen bur ⁇ t ⁇ trength) are reduced, and linting has al ⁇ o been found a problem in printing.
  • the ea ⁇ e of di ⁇ persion of Fiber Q is indicated by carrying out the method published in TAPPI Journal, Vol. 68, No. 8 (August, 1985), pages 88-91, using 1100 rpm agitator speed, and the result ⁇ are given in Table 2.
  • the compari ⁇ on Fiber P is essentially similar to Fiber A, but contains a lower amount (only 6.8% BWT) of diethylene glycol, and should therefore be easier to disper ⁇ e than Fiber A, as indicated herein, being of higher melting point and softening point. The lower the mixing time, under comparable conditions, the easier any fiber i ⁇ to disperse.
  • any fiber providing a log level by this method, and at thi ⁇ ⁇ peed of 1100 rpm, of les ⁇ than 500/100 g will provide sheet uniformity that is sati ⁇ factory according to the ⁇ tandard ⁇ of 1986, although lower log levels, ⁇ uch as 200 or less will be preferred.
  • Any ⁇ uitable polymer may be u ⁇ ed for the.binder fiber, e.g. polymer di ⁇ clo ⁇ ed in Scott, U.S. Patent No. 4,129,675, Pamm, U.S. Patent No. 4,281,042, Franko ⁇ ky, U.S. Patent No. 4,304,817 or Marcu ⁇ U.S. Patent Nos 4,794,038 and 4,818,599, provided the appropriate fiber dimensions and water-dispersible coating were u ⁇ ed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Artificial Filaments (AREA)

Abstract

Fibre polyester dispersible dans l'eau et câble de filament précurseur dont la surface est modifiée et la dispersibilité dans l'eau est améliorée par le traitement des filaments polyester non étirés avec une très petite quantité d'un agent caustique lorsqu'ils sont fraîchement extrudés, de préférence dans un procédé d'apprêt de filage.
PCT/US1991/006499 1991-09-16 1991-09-16 Amelioration apportee aux fibres polyester dispersibles dans l'eau WO1993006269A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1991/006499 WO1993006269A1 (fr) 1991-09-16 1991-09-16 Amelioration apportee aux fibres polyester dispersibles dans l'eau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1991/006499 WO1993006269A1 (fr) 1991-09-16 1991-09-16 Amelioration apportee aux fibres polyester dispersibles dans l'eau

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003069038A1 (fr) * 2002-02-15 2003-08-21 Sca Hygiene Products Ab Matiere en microfibres enchevetrees par procede hydraulique et procede de fabrication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078702A2 (fr) * 1981-11-03 1983-05-11 E.I. Du Pont De Nemours And Company Fibres et filaments liants en copolyester
US4707407A (en) * 1985-04-09 1987-11-17 E. I. Du Pont De Nemours And Company Synthetic water-dispersible fiber
US5069847A (en) * 1988-07-28 1991-12-03 E. I. Du Pont De Nemours And Company Improvements in process for preparing spun yarns

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078702A2 (fr) * 1981-11-03 1983-05-11 E.I. Du Pont De Nemours And Company Fibres et filaments liants en copolyester
US4707407A (en) * 1985-04-09 1987-11-17 E. I. Du Pont De Nemours And Company Synthetic water-dispersible fiber
US5069847A (en) * 1988-07-28 1991-12-03 E. I. Du Pont De Nemours And Company Improvements in process for preparing spun yarns

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003069038A1 (fr) * 2002-02-15 2003-08-21 Sca Hygiene Products Ab Matiere en microfibres enchevetrees par procede hydraulique et procede de fabrication

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