WO1997013895A1 - Ameliorations apportees a l'identification de fibres - Google Patents

Ameliorations apportees a l'identification de fibres Download PDF

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Publication number
WO1997013895A1
WO1997013895A1 PCT/US1995/012799 US9512799W WO9713895A1 WO 1997013895 A1 WO1997013895 A1 WO 1997013895A1 US 9512799 W US9512799 W US 9512799W WO 9713895 A1 WO9713895 A1 WO 9713895A1
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WO
WIPO (PCT)
Prior art keywords
void
fibers
voids
ofthe
filaments
Prior art date
Application number
PCT/US1995/012799
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English (en)
Inventor
Ismael Antonio Hernandez
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
Priority to US08/460,434 priority Critical patent/US5540994A/en
Priority to US08/458,944 priority patent/US5540993A/en
Application filed by E.I. Du Pont De Nemours And Company filed Critical E.I. Du Pont De Nemours And Company
Priority to AU38270/95A priority patent/AU3827095A/en
Priority to EP95936255A priority patent/EP0873438A4/fr
Priority to JP9515006A priority patent/JPH11513447A/ja
Priority to PCT/US1995/012799 priority patent/WO1997013895A1/fr
Priority to KR1019980702680A priority patent/KR19990064194A/ko
Publication of WO1997013895A1 publication Critical patent/WO1997013895A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor

Definitions

  • This invention concerns improvements in and relating to fiber identification, and includes a novel method of making a multi-void fiber with a characteristic by which it can later be identified, novel multi-void fibers so marked as to be identifiable, and products and materials including such marked fibers, especially fiberfill filling materials (often referred to shortly as "fiberfill") and products, including batts, fiberballs and other products comprising such marked fibers and materials comprising them, and processes and apparatus for obtaining such multi-void fibers and their products and materials.
  • fiberfill fiberfill filling materials
  • a fiber manufacturer's customers demand consistency in performance from the fibers provided by the manufacturer.
  • the manufacturer's customers require that the properties of any particular fiber not vary appreciably from batch to batch of that fiber as the different batches of that fiber are produced over several years.
  • the fiber manufacturer has a need to be able to identify fiber from different production batches, while maintaining the consistency and uniformity that the customers require.
  • Much notoriety has been given to fiber identification in criminology, for example, as a way to bring murderers or other criminals to justice. Manufacturers also, however, have other more mundane and practical reasons for needing to identify the production batch of particular fibers. So it has long been desirable to find a cheap yet effective system for identifying fibers.
  • multi- void filling fibers with a smooth round peripheral surface and with only three longitudinal voids, are disclosed by Hernandez et al. in U.S. Patent No. 5,458,971 (DP-6320), the disclosure of which is also included herein, by reference.
  • the present invention solves this need to identify and differentiate multi-void fibers by providing a visual identifying marker in the configuration of the cross-section ofthe multi-void fiber.
  • This marker identifies the multi-void fiber only visually, i.e., without significantly affecting performance ofthe fiber.
  • Fibers with such a visual identifying marker according to the present invention are often referred to herein as "identifier fibers" (or “identifier filaments”).
  • identifier fibers or “identifier filaments”
  • this invention provides a process for preparing multi- void filaments of a synthetic polymer, comprising the steps of post-coalescence melt-spinning the synthetic polymer through segmented spinning capillary orifices so the resulting freshly-spun molten streams coalesce and form continuous filaments having at least three voids, and quenching to solidify the filaments, and, if desired, drawing the resultant solid filaments, and/or further processing, and/or converting to staple fiber, characterized in that molten polymer is also spun in small amount through one or more separate small orifices located so as to form, respectively, one or more small protuberances that are visually identifiable on an inside surface of, respectively, one or more voids ofthe multi-void filaments.
  • a multi-void synthetic polymer fiber having at least three continuous longitudinal voids, wherein the multi -void cross-section ofthe fiber shows characteristic polymer material that protrudes into one or more ofthe voids from an inside surface ofthe void or voids; in other words, the cross-section shows that one or more such void is partially filled with characteristic polymer material that protrudes from a wall into such partially-filled void; thus said characteristic protruding polymer material differentially identifies said fiber from similar multi-void synthetic polymer fibers that do not contain any such protruding polymer material usually but does not significantly differentiate the performance properties of said fiber from said similar fibers.
  • this invention provides fiberfill filling material, and articles comprising such material, comprising resilient crimped multi-void filling fibers that are of a synthetic polymer, wherein said multi-void filling fibers have at least three continuous voids throughout their fiber length, and wherein said fiberfill filling material is identified by all or a predetermined proportion of said fibers having a multi-void cross-section that shows characteristic polymer material that protrudes into a predetermined number and predetermined pattern ofthe voids from an inside surface ofthe void or voids.
  • fiberfill (and including filled articles thereof) wherein said fiberfill comprises resilient crimped multi-void filling fibers of synthetic polymer, and wherein, e.g., at least 10 percent by weight of said fibers have a multi-void cross-section which shows that one or more such void contains (i.e., is partially filled with) characteristic protruding polymer material (i.e., that protrudes from an inside surface into such partially-filled void), whereby said characteristic protruding polymer material differentially identifies said fiber from a multi-void synthetic polymer fiber whose multi-void cross-section is similar except that it does not contain any such characteristic protruding polymer material and wherein the bulk properties of said fiber as filling material are essentially similar to the bulk properties of such a multi-void synthetic polymer fiber that is of similar cross-section except that it does not contain any such characteristic protruding polymer material; such multi- void fibers may contain at least three continuous longitudinal voids (i.e., throughout
  • Polymer material protruding from a surface of a wall of an internal void of a (first) multi-void fiber of a synthetic material is used to identify said (first) multi -void fiber and differentiate it from other multi-void fibers of similar cross-section and having similar bulk properties to those ofthe first (identified and differentiated) multi-void fiber, except, of course, that the other multi-void fibers do not have the polymer material protruding from a surface of a wall of an internal void.
  • Prefened features include using polyester polymer as the material for the synthetic polymer ofthe multi-void fiber and/or the characteristic polymer material, and preferably for both, including using the same polyester polymer for both, and using the invention for 4-hole fibers, 7-hole fibers, and/or 3-hole fibers with a smooth round periphery, such as are mentioned in the art and above, especially any such multi-void fibers with only 1 ofthe holes (i.e., voids) partially filled.
  • the fiberfill filling materials and resilient crimped multi-void filling fibers ofthe invention are prepared conventionally by methods known in the art, such as refened to herein.
  • Prefened multi-void filling fibers are prepared from polyester polymers, especially poly(ethylene terephthalate), and this prefened embodiment is described herein more particularly, for convenience, it being understood that appropriate modification can be made by those skilled in the art for other synthetic polymers, such as polyamides or polypropylene, to take account of their differences, e.g., in melting conditions and properties, such as melt viscosity.
  • One such disclosure in the art is Champaneria et al U.S. Patent No.
  • Figure 3 is an enlarged view of a spinneret capillary, taken looking at the lower face ofthe spinneret, for spinning prefened 4-void filaments ofthe invention as in Fig. 1, 4 and 5.
  • Figures 4-7 are magnified photographs of cross-sections of 4-void filaments, Figs. 4 and 5 being of prefened filaments according to the invention, whereas Figs. 6 and 7 are of prior art filaments for comparison. Figs. 4 and 7 are of magnification 500X. Figs. 5 and 6 are of magnification 1000X. These are discussed in Example 3.
  • Figure 8 is a graph plotting TBRM data, heights in inches versus pressures in psi, as discussed also in Example 3.
  • Figure 9 is an enlarged view of a spinneret capillary, taken looking at the lower face ofthe spinneret, for spinning prefened 3-void filaments ofthe invention as in Figs. 10 and 11.
  • Figures 10-13 are magnified photographs of cross-sections of 3-void filaments, Figs. 10 and 1 1 being of prefened identifier filaments according to the invention, whereas Figs. 12 and 13 are of filaments without identifier, for comparison.
  • Figs. 10 and 12 are of magnification 500X.
  • Figs. 11 and 13 are of magnification 1000X. These are discussed in Example 4.
  • Figure 14 is a graph plotting TBRM data, heights in inches versus pressure in psi, as discussed also in Example 4.
  • Figures 15 and 16 are magnified photographs showing not only cross- sections of prefened fibers ofthe invention, but also that the fibers are crimped, as described later herein.
  • the capillary is formed of four individual segments designated generally 11, 12, 13 and 14 in the form of T-shaped slots with four radial slots 15, 16, 17 and 18 radiating outwards to join outer peripheral slots 19, 20, 21, 22 that are curved to form arcs of an incomplete circle.
  • each peripheral slot 19, 20, 21 and 22, are enlarged "toes" 23 and 24, 25 and 26, 27 and 28, and 29 and 30, respectively, being enlarged ends of said slot to assist in post-coalescence of the emerging molten polymer to form the desired multi-void solid filament, as is known in the art, such as Tolliver, U. S. Patent No. 3,772,137.
  • An important and novel difference in Figure 3 herein that differentiates from Figure 1 of
  • Champaneria is the provision of an orifice 40.
  • Molten polymer extruded through orifice 40 solidifies and coalesces on an internal wall of one ofthe voids of the filament formed by post-coalescence of molten polymer extruded through slots 1 1, 12, 13 and 14, to form a protuberance partially filling one ofthe voids.
  • the relative location ofthe protuberance within the void may vary along a length of the filament, as will be understood.
  • Magnified cross-sections of such identifier filaments ofthe invention, containing 4 voids, one of which is partially filled with polymer that protrudes from an internal wall of such void, are shown in Figure 1 , at 625X magnification.
  • similarly magnified cross-sections of conventional 4-void filaments are shown in Figure 2.
  • the cross-sections in Figs. 1 and 2 have been greatly magnified. Fiberfill filaments are so fine that, without magnification, it is doubtful that anyone would be able to see any void in the cross-section, or whether the filament is solid, hollow, or multi-void, let alone be able to recognize if any void is partially filled with protruding polymer.
  • both types of filaments can be prepared to have comparable performance and properties as filling materials. In other words, an objective has been achieved in this respect. This will be discussed more hereinafter.
  • the invention lends itself to many variations.
  • the number and pattern ofthe protuberances in relation to the voids may be varied, especially with filaments having larger numbers of voids, such as 7 voids, bearing in mind that it has generally been thought desirable to maximize the void content to take advantage ofthe presence ofthe voids.
  • a regulated (i.e., predetermined) proportion e.g., at least about 10% by weight
  • a regulated proportion e.g., at least about 10% by weight
  • different polymers may be used, if desired, so as to provide better identification for merges or batches of fiber.
  • fiberfill (one or more batches) according to the invention can be identified by providing a predetermined proportion (that may be recorded, and may vary up to 100%) ofthe constituent filling fibers with a predetermined number and predetermined pattern of voids containing visual identifier, i.e., characteristic polymer material protruding into, i.e., partially filling, such void(s), as described, and these details may all be recorded.
  • visual identifier i.e., characteristic polymer material protruding into, i.e., partially filling, such void(s), as described, and these details may all be recorded.
  • partially filling one or more voids ofthe multi-void filling fibers did not significantly change the bulk properties or performance ofthe fibers as fiberfill. Applicant has also found that the extent to which the voids are filled has not significantly changed the bulk properties or performance.
  • the invention is further illustrated in the following Examples, all parts and percentages being by weight, unless otherwise indicated.
  • the levels of coatings (slickeners and finishes) applied to the filaments were OWF (with regard to the weight ofthe fiber).
  • Relative Viscosity (sometimes refened to as LRV) and void content (by volume, by a flotation method) were determined by the methods refened to in U.S. Patent No. 4,712,988 (Broaddus et al.).
  • Bulk measurements were determined by the method refened to in Tolliver U.S. Patent No. 3,772,137 refened to hereinabove, and crimp measurements essentially as described therein.
  • Fiber-to-fiber friction values for fiberfill filling (staple) fibers are generally obtained by what is known as Staple Pad Friction (SPF) measurements.
  • SPF Staple Pad Friction
  • a staple pad of the fibers whose friction is to be measured is sandwiched between a weight on top of the staple pad and a base that is underneath the staple pad and is mounted on the lower crosshead of an Instron 1122 machine (product of Instron Engineering Corp. , Canton, Mass).
  • the staple pad is prepared by carding the staple fibers (using a SACO- Lowell roller top card) to form a batt which is cut into sections, that are 4.0 ins in length and 2.5 ins wide, with the fibers oriented in the length dimension of the batt. Enough sections are stacked up so the staple pad weighs 1.5 g.
  • the weight on top of the staple pad is of length (L) 1.88 ins, width (W) 1.52 ins, and height (H) 1.46 ins, and weighs 496 gm.
  • the surfaces of the weight and of the base that contact the staple pad are covered with Emery cloth (grit being in 220 to 240 range), so that it is the Emery cloth that makes contact with the surfaces of the staple pad.
  • the staple pad is placed on the base.
  • the weight is placed on the middle of the pad.
  • a nylon monofil line is attached to one of the smaller vertical (WxH) faces of the weight and passed around a small pulley up to the upper crosshead of the Instron, making a 90 degree wrap angle around the pulley.
  • a computer interfaced to the Instron is given a signal to start the test.
  • the lower crosshead of the Instron is moved down at a speed of 12.5 in/min.
  • the staple pad, the weight and the pulley are also moved down with the base, which is mounted on the lower crosshead.
  • Tension increases in the nylon monofil as it is stretched between the weight, which is moving down, and the upper crosshead, which remains stationary.
  • Tension is applied to the weight in a horizontal direction, which is the direction of orientation of the fibers in the staple pad. Initially, there is little or no movement within the staple pad.
  • the force applied to the upper crosshead of the Instron is monitored by a load cell and increases to a threshold level, when the fibers in the pad start moving past each other.
  • the threshold level indicates what is required to overcome the fiber-to-fiber static friction and is recorded.
  • the coefficient of friction is determined by dividing the measured threshold force by the 496 gm weight. Eight values are used to compute the average SPF. These eight values are obtained by making four determinations on each of two staple pad samples.
  • Filaments were spun from poly(ethylene terephthalate) of relative viscosity (LRV) 20.4, at a polymer temperature of 291-297°C, at 1195 ypm (1092 mpm), through a spinneret with 388 capillaries, at a throughput per capillary of 0.234 lbs./hr. (0.106 kg./hr.), using capillary orifice designs as shown in Figure 3.
  • the spun filaments were assembled to form a rope of 922,000 relaxed drawn denier.
  • the rope was drawn in a conventional manner, using a draw ratio of 3.39X in a hot, wet spray draw zone maintained at 90°C.
  • the drawn filaments were crimped to three different levels, i.e., to obtain three different levels of crimp, and conespondingly of bulkiness (namely, Support Bulk (i.e., bulk at 0.2 psi) heights of 0.6, 0.8 and 0.9 inches measured on a stack of carded webs, as described by Tolliver), in a conventional stuffer box crimper of cantilever type (3.5 in, 8.9 cm size), and the crimped ropes were relaxed in an oven at 180°C before cutting.
  • a conventional antistatic overlay finish of about 0.07% by weight was applied to every sample.
  • the first (lowest bulk) fiber had, however, also been slickened before relaxing with a finish containing about 1% silicone per weight of fiber.
  • the resulting filaments were all cut to staple of length 2 inches (5.4 cm).
  • Cross sections ofthe resulting cut fibers of the invention are shown in Figure 1, and show a solid axial core and four parallel continuous internal voids, one of which contains a protuberance on an inside surface of the void to serve as an identification mark.
  • the outside peripheries ofthe fibers were round and smooth.
  • the fibers were found to have an average void content of 17.1 % and a denier per filament of about 5.5.
  • the performance and properties ofthe two sets of fibers as fiberfill filling material were compared and found to be essentially similar, i.e., the bulkiness of each pair ofthe fiberfill samples was found to be similar, despite the differences in cross-section ofthe fibers.
  • the friction measurements ofthe slickened fibers were, respectively, 0.265 and 0.293, i.e., essentially similar.
  • Two types of fibers (one according to the invention, with an identifier, and the other of conventional cross-section, without such identifier) were prepared essentially as described in Example 1, except that they were spun through spinnerets having 212 capillaries, and were of higher density.
  • the void contents of the filaments, as drawn, were about 17.9% and 19.8%, respectively, and the relaxed drawn deniers were about 14.4 and 14.3, respectively, for the fiber ofthe invention (having the identifier) and the conventional fiber.
  • the properties of both types of fibers were again compared and both fibers were found to have essentially the same properties, and the same performance as fiberfill.
  • Filaments were spun from poly(ethylene terephthalate) of relative viscosity (LRV) 20.4, at a polymer temperature of 291-297°C at 1277 ypm (1 167 mpm), through a spinneret with 363 capillaries, at a throughput per capillary of 0.278 lbs./hr. (0.126 kg./hr.), using capillary orifice designs as shown in Figure 3 herein.
  • the spun filaments were assembled to form a rope of 65,000 relaxed drawn denier. The rope was drawn in a conventional manner, using a draw ratio of 2.9X in a hot, wet spray draw zone maintained at 95 °C.
  • the drawn filaments were crimped to two different levels, to obtain two levels of crimp (and conespondingly two levels of bulkiness, namely Support Bulk, measured as described by Tolliver for carded webs in U.S. Patent 3,772,137), as given for Sample A and for Sample C in TABLE A below, in a conventional stuffer box crimper of cantilever type (1.0 in, 2.5 cm size) and the crimped ropes were relaxed in an oven at 180°C before cutting. A conventional antistatic overlay finish of about 0.15% per weight was applied to every sample. The resulting filaments were all cut to staple of length 2 inches (5.4 cm).
  • Each such filament contains a solid axial core and four parallel continuous voids, one of which contains a protuberance of an inside surface ofthe void to serve as an identification mark. These fibers have a void content of about 12.5%.
  • Sample A identifier fibers
  • Sample B conventional fibers
  • Sample C identifier fibers
  • Sample D conventional fibers
  • Sample C identifier fibers
  • Sample D conventional fibers
  • a 3-void filling fiber with a smooth round peripheral surface is disclosed by Hernandez et al. in U.S. Patent No. 5,458,971, so the following Example 4 was performed to make 3-void filling fibers with and without identifiers in one ofthe voids, and to compare their properties and performance as fiberfill.
  • Fig. 9 shows a spinneret capillary for spinning identifier filaments with three voids. It will be noted that the capillary is segmented, with three segments __. disposed symmetrically around an axis or central point £.
  • Each segment _X consists of two slots, namely a peripheral arcuate slot _2 and a radial slot __,, the middle ofthe inside edge of peripheral arcuate slot _2 being joined to the outer end of radial slot __., so each segment forms a kind of "T-shape" with the top ofthe T being curved convexly to form an arc of a circle.
  • Each peripheral arcuate slot _Z extends almost 120 deg. around the circumference ofthe circle.
  • Each radial slot __. comes to a point 5_4_ at its inner end. Points _4 are spaced from the central point Q.
  • Each peripheral arcuate slot _Z is separated from its neighbor by a distance which is refened to as a "tab".
  • the short faces of neighboring peripheral arcuate slots _Z on either side of each tab are parallel to each other and parallel to the radius that bisects such tab.
  • the capillary design shown in Figure 9 is typical of designs used in the art to provide hollow filaments by post-coalescence spinning through segmented orifices. Points _ at the inner ends of radial slots __. are provided in the spinneret capillary design shown in Fig. 9, however, to improve coalescence ofthe polymer at the center ofthe filament, i.e., to ensure that the three voids do not become connected.
  • Figure 9 An important and novel difference in Figure 9 herein (that differentiates from orifice designs of the prior art) is the provision of an orifice 60.
  • Molten polymer extruded through orifice 60 solidifies and coalesces on an internal wall of one ofthe voids ofthe filament formed by post-coalescence of molten polymer extruded through slots 51, 52 and 53 to form a protuberance partially filling one ofthe voids and acting as an identifier when the cross-section of that filament is examined under magnification.
  • the relative location ofthe identifier protuberance within the void may vary along a length ofthe filament, as will be understood.
  • more than one void may be partially filled by providing, conespondingly, more than one orifice like orifice 60.
  • Filaments were spun from poly(ethylene terephthalate) of relative viscosity (LRV) 20.4, at a polymer temperature of 291 -297°C at 1277 ypm (1 167 mpm), through a spinneret with 363 capillaries, at a throughput per capillary of 0.278 lbs./hr. (0.126 kg./hr.), using capillary orifice designs as shown in Figure 9.
  • the spun filaments were assembled to form a rope of 65,000 relaxed drawn denier.
  • the rope was drawn in a conventional manner, using a draw ratio of 2.9X in a hot, wet spray draw zone maintained at 95°C.
  • the drawn filaments were crimped to two different levels, to obtain two levels of crimp (and conespondingly two levels of bulkiness, namely Support Bulk, measured as described by Tolliver for carded webs in U.S. Patent 3,772,137, as given for Sample A and for Sample C in TABLE B below), in a conventional sniffer box crimper of cantilever type (1.0 in, 2.5 cm size) and the crimped ropes were relaxed in an oven at 180°C before cutting. A conventional antistatic overlay finish of about 0.15% per weight was applied to every sample. The resulting filaments were all cut to staple of length 2 inches (5.4 cm).
  • FIG. 10 and 1 Cross-sections ofthe resulting cut identifier fibers are shown in Figures 10 and 1 1.
  • Each such filament contains a solid axial core and three parallel continuous voids, one of which contains a protuberance of an inside surface ofthe void to serve as an identification mark.
  • These fibers have a void content of about 18%.
  • Sample A (identified fibers) and Sample B (comparison fibers) were crimped to similar crimp levels of about 4.5 crimps per inch (CPI), and to a Crimp Index (CHI) of about 7.
  • Table B shows that the TBRM data measured for such Samples are very similar, so much so that, when the data points are plotted on a graph, as shown in Figure 14, Curves A and B are extremely close together.
  • Sample C identified fibers
  • Sample D (conventional fibers) were crimped to similar crimp levels of about 7.5 crimps per inch (CPI), and to a similar Crimp Index (CHI) of about 11, and give similar TBRM results (see Table B and Figure 14).
  • FIG. 15 is a magnified photograph of crimped 4- void fibers according to the invention, showing some 4- void cross-sections somewhat similarly to those in the (magnified) photographs in Figs.
  • Figure 16 is a (magnified) photograph like that in Figure 15, except of crimped 3-void fibers according to the invention.
  • the multi-void fibers ofthe invention may be processed into products such as batts and fiberballs (sometimes refened to as clusters) and further processed into pillows, filled apparel, comforters, cushions and like bedding and furnishing material, as disclosed in the art, including that specifically mentioned herein, and art such as LeVan U. S. Patent Nos. 3,510,888, and 4,999,232, and various Marcus patents, including U. S. Patent Nos. 4,618,531, 4,783,364, 4,794,038, 4,818,599, 4,940,502, and 5,169,580, and U. S. Patent No. 5,088,140 (Belcher et al).
  • fiberfill according to the invention may consist essentially entirely of identifier fibers according to the invention, or these identifier fibers may be mixed with other fibers; thus, the fiberfill filling material may be identified by all or a portion of its fibers being such identifier fibers.
  • Fiberfill as is well understood by those skilled in the art, is shorthand for fiberfill filling material, or more shortly fiberfilling material, and refers to a bulky mass of fibers used to fill articles, such as pillows, cushions and other furnishing materials, including other bedding materials, such as sleeping bags, mattress pads, quilts, comforters, duvets and the like, and in apparel, such as parkas and other insulated articles of apparel, whether quilted or not.
  • Crimp is an important characteristic and provides the bulk that is an essential requirement for fiberfill.
  • the fibers are crimped by mechanical means, usually in a stuffer-box crimper, as described, for example, in Halm et al. in USP 5,112,684.
  • Crimp can also be provided by other means, such as asymmetric quenching or using bicomponent filaments as reported, for example, by Marcus in USP 4,618,531 and in USP 4,794,038, and in the literature refened to therein, so as to provide "spiral crimp". All this is well understood by those skilled in this art.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

Des fibres de rembourrage et/ou des fibres à plusieurs vides sont identifiées et/ou différenciées par au moins un vide partiellement rempli d'une protubérance de matériau polymère de caractérisation. Ce matériau peut être identique ou différent de celui composant le reste de la fibre. Cette protubérance est formée par un réglage approprié des capillaires en cours de filage, c.-à-d. au cours de l'extrusion, en vue de former la fibre.
PCT/US1995/012799 1993-02-16 1995-10-12 Ameliorations apportees a l'identification de fibres WO1997013895A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US08/460,434 US5540994A (en) 1993-02-16 1995-06-02 Fiber identification
US08/458,944 US5540993A (en) 1993-02-16 1995-06-02 Relating to fiber identification
AU38270/95A AU3827095A (en) 1993-02-16 1995-10-12 Improvements in and relating to fiber identification
EP95936255A EP0873438A4 (fr) 1993-02-16 1995-10-12 Ameliorations apportees a l'identification de fibres
JP9515006A JPH11513447A (ja) 1993-02-16 1995-10-12 繊維の識別における、並びにそれに関する改善
PCT/US1995/012799 WO1997013895A1 (fr) 1993-02-16 1995-10-12 Ameliorations apportees a l'identification de fibres
KR1019980702680A KR19990064194A (ko) 1995-10-12 1995-10-12 개선된 섬유 식별 방법

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US1754593A 1993-02-16 1993-02-16
PCT/US1995/012799 WO1997013895A1 (fr) 1993-02-16 1995-10-12 Ameliorations apportees a l'identification de fibres

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AT504704B1 (de) * 2006-06-14 2008-12-15 Chemiefaser Lenzing Ag Fasern enthaltender gegenstand

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US5462802A (en) * 1991-12-02 1995-10-31 Teijin Limited Polyamide hollow and/or non-circular fiber and process for making same

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JPS5756512A (en) * 1980-09-17 1982-04-05 Nippon Ester Co Ltd Hollow fiber and spinneret therefor
US4527383A (en) * 1983-03-28 1985-07-09 Minnesota Mining And Manufacturing Company Threads for identification of garments

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Publication number Priority date Publication date Assignee Title
US5462802A (en) * 1991-12-02 1995-10-31 Teijin Limited Polyamide hollow and/or non-circular fiber and process for making same
US5370935A (en) * 1993-04-13 1994-12-06 E. I. Du Pont De Nemours And Company Polyamide hollow filaments

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0873438A4 *

Also Published As

Publication number Publication date
JPH11513447A (ja) 1999-11-16
AU3827095A (en) 1997-04-30
EP0873438A1 (fr) 1998-10-28
EP0873438A4 (fr) 1999-01-27

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