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WO2001019713A1 - Enroulement de paquets de fibres et procede d'enroulement de ces derniers sur une bobine - Google Patents

Enroulement de paquets de fibres et procede d'enroulement de ces derniers sur une bobine Download PDF

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Publication number
WO2001019713A1
WO2001019713A1 PCT/US2000/024908 US0024908W WO0119713A1 WO 2001019713 A1 WO2001019713 A1 WO 2001019713A1 US 0024908 W US0024908 W US 0024908W WO 0119713 A1 WO0119713 A1 WO 0119713A1
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WO
WIPO (PCT)
Prior art keywords
barrel
layer
fiber strands
bobbin
package
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.)
Ceased
Application number
PCT/US2000/024908
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English (en)
Inventor
William B. Rice
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PPG Industries Ohio Inc
Original Assignee
PPG Industries Ohio Inc
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 PPG Industries Ohio Inc filed Critical PPG Industries Ohio Inc
Priority to AU73700/00A priority Critical patent/AU7370000A/en
Publication of WO2001019713A1 publication Critical patent/WO2001019713A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H55/00—Wound packages of filamentary material
    • B65H55/04—Wound packages of filamentary material characterised by method of winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a process for winding a fiber strand upon a bobbin to form a wound package and, more particularly, for winding the package in a manner that selectively winds undesirable portions of the strand on the bobbin so that upon later use of the wound package, e.g. during weaving, use of the undesirable portions can be avoided.
  • Glass fibers are commonly formed by attenuating molten glass through orifices in a bushing. The fibers are then drawn across an applicator which coats at least a portion of the fiber surface with a sizing composition, gathered into one or more discrete strands by gathering shoes, and wound on a winding machine into a forming package. The forming packages are then collected and typically placed in a drier to dry the sizing composition. After drying, the forming packages are moved to winders where the fiber strands are unwound from the forming package and wound onto a bobbin to form wound packages. The bobbins are thereafter used to supply weft, or fill, yarn during a weaving operation.
  • the sizing composition tends to migrate to the outer portions of the forming package so that the fiber strands along the outer surface of the package have a greater amount of sizing on their surface than the inner strands.
  • the strand initially wound onto the bobbin has a greater amount of sizing coating than the remaining strand.
  • the additional sizing coating can result in defects in the woven fabric.
  • the efficiency of an air jet weaving operation can be reduced due to the additional amount of coating in the fiber strand because the greater amount of coating can prevent the fiber strands from opening and being carried by the jets of air, as will be discussed later in more detail. It has been observed that this variation in the amount of coating on the fibers is of particular concern where the weaving operation uses fill yarn having a resin compatible coating. These coatings are typically tacky and tend to hold the fiber bundle together. It has been further observed that fine yarns, e.g. E-225 and D-450 yarns, with resin compatible coatings that are used as fill yarn in a weaving operation are particularly susceptible to reduced air jet weavability when the yarn strands have an increased amount of such resin compatible coating.
  • the present invention provides a process for winding a fiber strand on a bobbin to form a wound package, comprising: (a) winding a first layer of fiber strands having a first property about a barrel of a bobbin such that at least a first portion of the barrel is covered by the first layer of fiber strands and at least a second portion of the barrel is uncovered by the first layer of fiber strands; and (b) winding a second layer of fiber strands having a second property different from the first property about the barrel of the bobbin such that the second layer of fiber strands covers at least the second portion of the bobbin barrel to form a wound package, wherein when the first and second fiber strands are unwound from the bobbin, the second portion of the barrel will be exposed prior to the first portion of the barrel.
  • the second layer of fiber strands completely covers the first layer of fiber strands and the fiber strands in the first layer has an loss on ignition greater than the loss on ignition of the fiber strands in the second layer.
  • the present invention further provides a wound package of fiber strands comprising: (a) a bobbin having a central barrel; (b) a first layer of fiber strands having a first property positioned on the barrel of a bobbin such that at least a first portion of the barrel is covered by the first layer of fiber strands and at least a second portion of the barrel is uncovered by the first layer of fiber strands; and (c) a second layer of fiber strands having a second property different from the first property positioned on the bobbin such that the second layer of fiber strands covers at least the second portion of the barrel to form a wound package, wherein when the first and second fiber strands are unwound from the bobbin, the second portion of the barrel will be exposed prior to the first
  • the present invention also provides a method of weaving a fabric, comprising: (a) positioning a plurality of warp strands in generally spaced apart, parallel orientation; (b) providing fill strand wound about a barrel of a bobbin such that at least a first portion of the barrel is covered by a first layer of fiber strands and at least a second portion of the barrel is uncovered by the first layer of fiber strands, and at least the second portion of the barrel is covered with a second layer of fiber strands having a second property different from the first property; (c) unwinding the fill strands from the bobbin; (d) interlacing the fill strands with the warp strands during a weaving operation; (e) sensing when the second layer of fiber strands has been unwound from the second portion of the barrel; and (f) suspending the interlacing step in response to the sensing step prior to unwinding the first layer of fiber strand.
  • the sensing step comprises monitors the second
  • FIG. 1 is a schematic front elevational view of an apparatus for producing a wound package of fiber strand incorporating features of the present invention
  • Fig. 2 is a front elevational, cut-away view of a wound package incorporating features of the present invention, with portions removed for clarity;
  • Fig. 3 is a view similar to Fig. 2 of an alternate embodiment of the invention.
  • the process of the present invention selectively winds undesirable portions of a fiber strand onto a bobbin so that upon later use, the undesirable portions are avoided and not incorporated into a fabric. This in turn reduces or eliminates woven fabric defects that can result from the undesirable strand.
  • all numbers expressing quantities of ingredients, processing conditions, and so forth herein are to be understood as being modified in all instances by the term "about”. Accordingly, unless indicated to the contrary, the numerical parameters are approximations that may vary depending upon the desired properties sought to be obtained by the present invention.
  • each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values set forth in any example is reported as precisely as possible. Any numerical value, however, inherently contain certain errors necessarily resulting from the standard deviation found in their respective measuring and testing methods.
  • Fig. 1 illustrates an embodiment of a winder, generally designated 10, for winding a wound package 12, in accordance with the present invention.
  • the wound package 12 is formed from a generally continuous coated fiber strand 14.
  • fiber strand or “strand” mean a plurality of individual fibers, i.e., at least two fibers, and the strand can comprise fibers made of different fiberizable materials. (The bundle of fibers can also be referred to as "yarn”.)
  • the term "fiber” means an individual filament.
  • the fibers preferably have an average nominal fiber diameter ranging from 3 to 35 micrometers.
  • the present invention is generally useful in the winding of fiber strands, yarns or the like of natural or man-made materials.
  • the fibers of strand 14 are preferably formed from any type of fiberizable glass composition known to those skilled in the art, including those prepared from fiberizable glass compositions such as "E-glass”, “A-glass”, “C-glass”, “D-glass”, “R-glass”, “S-glass”, and E-glass derivatives.
  • E-glass derivatives means glass compositions that include minor amounts of fluorine and/or boron and preferably are fluorine-free and/or boron-free.
  • minor amounts of fluorine means less than 0.5 weight percent fluorine, preferably less than 0.1 weight percent fluorine
  • “minor amounts of born” means less than 5 weight percent boron, preferably less than 2 weight percent boron.
  • Basalt and mineral wool fibers are examples of other glass fibers useful in the present invention.
  • Preferred glass fibers are formed from E-glass or E-glass derivatives. Such compositions and methods of making glass filaments therefrom are well known to those skilled in the art and further discussion thereof is not believed to be necessary in view of the present disclosure. If additional information is needed, such glass compositions and fiberization methods are disclosed in K. Loewenstein, The Manufacturing Technology of Glass Fibres. (3d Ed. 1 993) at pages 30-44, 47-60, 1 1 5- 122 and 1 26-1 35, and U.S. Patent Nos. 4,542,106 and 5,789,329, which are hereby incorporated by reference.
  • the fibers of strand 14 can be formed from other types of fiberizable material known to those skilled in the art including fiberizable inorganic materials, fiberizable organic materials and mixtures of any of the foregoing.
  • the inorganic and organic materials can be either man-made or naturally occurring materials.
  • fiberizable means a material capable of being formed into a generally continuous filament, fiber, strand or yarn.
  • Non-limiting examples of suitable non-glass fiberizable inorganic materials include ceramic materials such as silicon carbide, carbon, graphite, mullite, aluminum oxide and piezoelectric ceramic materials.
  • suitable fiberizable organic materials include cotton, cellulose, natural rubber, flax, ramie, hemp, sisal and wool.
  • suitable fiberizable organic polymeric materials include those formed from polyamides (such as nylon and aramids), thermoplastic polyesters (such as polyethylene terephthalate and polybutylene terephthalate), acrylics (such as polyacrylonitriles), polyolefins, polyurethanes and vinyl polymers (such as polyvinyl alcohol).
  • Non-glass fiberizable materials useful in the present invention and methods for preparing and processing such fibers are discussed at length in the Encyclopedia of Polymer Science and Technology. Vol. 6 (1 967) at pages 505-71 2, which is specifically incorporated by reference herein. It is understood that blends or copolymers of any of the above materials and combinations of fibers formed from any of the above materials can be also used in the present invention, if desired.
  • the glass fibers can be formed in any suitable method known in the art, for forming glass fibers.
  • glass fibers raw materials can be combined, melted and homogenized in a glass melting furnace, and delivered into fiber forming apparatuses where the molten glass is attenuated into continuous glass fibers by winding groups of fibers on a winder to produce forming packages.
  • fiber forming apparatuses where the molten glass is attenuated into continuous glass fibers by winding groups of fibers on a winder to produce forming packages.
  • one or more coating compositions are present on at least a portion of the surfaces of the glass fibers to impart desired features to the fiber, e.g. to protect the fiber surfaces from abrasion during processing and inhibit fiber breakage.
  • the coating is present on the entire outer surface or periphery of the fibers.
  • suitable coating compositions include sizing compositions and secondary coating compositions.
  • size refers to the coating composition, typically an aqueous composition applied to the filaments immediately after formation of the glass fibers.
  • secondary coating refers to a coating composition applied secondarily to one or a plurality of strands after the sizing composition is applied, and preferably at least partially dried.
  • Typical sizing compositions can include as components film- formers, lubricants, coupling agents, emulsifiers, antioxidants, ultraviolet light stabilizers, colorants, antistatic agents and water, to name a few.
  • suitable sizing compositions are set forth in Loewenstein at pages 243-295 (2d Ed. 1983) and U.S. Patent Nos. 4,390,647 and 4,795,678, each of which is hereby incorporated by reference.
  • the sizing can be applied in many ways, for example by contacting the filaments immediately after formation with a static or dynamic applicator, such as a roller or belt applicator, spraying, or other means, examples of which are disclosed in Loewenstein at pages 169-177, which is hereby incorporated by reference.
  • the sized fibers are preferably dried at room temperature or at elevated temperatures. Suitable ovens for drying glass fibers are well known to those of ordinary skill in the art. Drying of glass fiber forming packages or cakes is discussed in detail in Loewenstein at pages 224- 230, which is hereby incorporated by reference.
  • the forming package can be dried in an oven at a temperature of 104°C (220°F) to 160°C (360°F) for 10 to 13 hours to produce glass fiber strands having a dried residue of the sizing composition thereon.
  • the temperature and time for drying the glass fibers will depend upon such variables as the percentage of solids in the sizing composition, components of the sizing composition and type of glass fiber.
  • the amount of the sizing composition present on the fiber strand after drying is preferably less than 30 percent by weight, more preferably less than 10 percent by weight and most preferably between 0.1 to 5 percent by weight as measured by loss on ignition (LOI).
  • LOI loss on ignition
  • the term "loss on ignition” means the weight percent of dried sizing composition present on the surface of the fiber strand as determined by Equation 1 :
  • the sized glass strands can be further treated with a secondary coating composition, that can be the same as or different from the sizing composition, in any convenient manner well known to those skilled in the art.
  • the strand(s) 14 is supplied to the winder 10 by one or more forming packages 16. Although up to 60 forming packages can be used to feed a winder 10, preferably a single forming package is used. A single forming package 16 is shown in Fig. 1 for purposes of clarity in the drawings.
  • the forming package 16 has at least one fiber or strand 14 wound thereon.
  • each strand 14 comprises a plurality of generally linear filaments, for example continuous glass filaments.
  • Typical forming packages 16 are generally cylindrically-shaped and have a hollow center.
  • the strand 14 can be drawn from the inside or the outside of the forming package 16, but preferably is drawn from the outside of the forming package 16 for textile yarn manufacturing.
  • the dimensions of the forming package 16 can vary, depending upon such variables as the diameter and type of fiber wound thereon, and are generally determined by convenience for later handling and processing.
  • forming packages 16 are 15.2 to 76.2 centimeters (6 to 30 inches) in diameter and have a length of 5.1 to 101.6 centimeters (2 to 40 inches).
  • the sides of the forming package 16 can be tapered or rounded.
  • Non-limiting examples of forming package 16 dimensions are set forth in U.S. Patent Nos. 3,685,764 and 3,998,326, each of which is hereby incorporated by reference.
  • the forming package 16 is supported by a rotatabie support 18, preferably by positioning the hollow of the package 16 upon the support 18.
  • the support 18 is attached to a frame 20, which can be a portion of the winder 10 as shown in Fig. 1 or a portion of a separate, free-standing frame such as a creel.
  • the frame 20 can be formed from a rigid material such as stainless steel, carbon steel or aluminum. Conventional creels suitable for use in the present invention are shown in Loewenstein at page 322, which is hereby incorporated by reference.
  • the rotatabie support 18 is a driven roll which is rotated at a predetermined speed by a drive device (not shown) to unwind the forming package 16. Suitable drive devices including motors are well known to those skilled in the art and further discussion thereof is not believed to be necessary.
  • the support 18 can be rotated at a constant speed or preferably at a varying speed.
  • the speed at which the support 1 8 is rotated can be 50 to 300 revolutions per minute (rpm), and preferably 100 to 250 rpm.
  • the support is rotated at an average constant speed such that the strand 14 is fed to the winder 10 at a generally constant average feed rate of 50 to 300 meters/minute, and more preferably 100 to 250 meters/minute.
  • the winder 10 can further include a drop wire device 22 or other similar device that ensures that the strand 14 being provided to the winder 10 has not broken.
  • the drop wire device 22 includes a rigid member or wire, a biasing means and a signaling means for signaling an operator (not shown) or the winder 10 to stop the winder 10 when contact between the wire and strand 14 is interrupted, for example when the strand 1 4 breaks.
  • Other suitable strand interruption devices are well known to those skilled in the art and further discussion thereof is not believed to be necessary.
  • the winder 10 can further include a strand alignment device.
  • the strand alignment device aligns the strand received from the forming package 1 6 with a rotatabie collector of the winder to facilitate winding.
  • a non-limiting example of a suitable strand alignment device is a coil or pig-tail 24, shown in Fig. 1 .
  • the pig-tail 24 is a loose coil of metal or other rigid material through which the strand 14 is threaded.
  • Other devices for aligning the strand 14 with the collector will be evident to those skilled in the art and further discussion thereof is not believed to be necessary.
  • the fiber strand 14 is wound about a barrel 26 of a bobbin 28 supported upon a rotatabie collector or spindle 30 of the winder 10 to form a wound package 1 2.
  • the winder 1 0 is a strand twisting apparatus 32 or twist frame, shown in Fig. 1 , which imparts a twist to the strand 14 during winding to form a yarn.
  • the twist is expressed in units of turns of twist per inch or meter. Although not limiting in the present invention, suitable twist can be 1 5 to 50 turns per meter. The twist is also specified in terms of direction by a letter.
  • Yarn has an S-twist if, when positioned vertically, the visible spirals or helices around its central axis assume an ascending right to left configuration, as in the central portion of the letter "S". In Z-twist yarn, the strands assume an ascending left to right configuration as in the central portion of the letter "Z”.
  • the present process is suitable for forming yarns having either S-twist or Z-twist.
  • the present invention is also suitable for forming yarns that have little or no twist, typically referred to as zero-twist yarn, which is well known to those skilled in the art.
  • the yarn can be plied by twisting a plurality of strands or cabled by twisting a plurality of plied yarns.
  • twisting of yarns see Loewenstein at pages 333-339, which is hereby incorporated by reference.
  • bobbin 28 can be any conventional bobbin well known to those skilled in the art.
  • barrel 26 of the bobbin 28 is generally cylindrical, although all or a portion of the cylinder can be conical.
  • Barrel 26 of the bobbin 28 can have one or more ridges 34, protrusions or irregularities, as desired.
  • the bobbin can be made from any generally rigid, non-abrasive material, but preferably is made from a thermoplastic material such as high-impact polystyrene.
  • suitable bobbins are shown as #28, #31 , #33, #41 , #53 and # 96 in "PPG Fiber Glass Yarn Products and Packaging", a Technical
  • a strand twisting apparatus 32 such as is shown in Fig. 1
  • the bobbin 28 is supported or releasably mounted upon the rotatabie collector or spindle 30, shown in phantom in Fig. 1 .
  • the spindle 30 and bobbin 28 are typically rotated at a speed of 2500 to 4500 revolutions per minute (rpm), and preferably 3000 to 4000 rpm.
  • rpm revolutions per minute
  • Methods and apparatus for securing the bobbin 28 to the spindle 30, as well as drive arrangements to rotate the bobbin 28 and spindle 30, are well known to those skilled in the art.
  • twist frame manufacturers includes Baco Machinery, Inc. of Lowell, North Carolina, ICBT of France and Platt-Saco Lowell of Easle ⁇ , South Carolina.
  • the strand 14 is passed through a traveler 36, or traverse having an eye 38, the traveler 36 being slidably engaged with a ring 40 which is reciprocated along a central axis of rotation 42 of the bobbin 28 as the strand 14 is wound around the bobbin 28 to form the wound package 12.
  • the ring 40 has a track 44 that secures the traveler 36 and permits the traveler 36 to circle the ring 40 in response to the forces exerted upon the strand 1 4 as the package 1 2 is wound.
  • the tension in the strand 14 is influenced by the weight of the traveler 36.
  • the traveler 36 can weigh 0.1 grams to 0.5 grams.
  • the eye 38 of the traveler 36 has a yarn contact surface 46 which can be varied in size or shape depending upon such factors as the type and weight of the strand 14.
  • the yarn contact surface 46 is C-shaped, although the yarn contact surface 46 can be of any shape desired.
  • the size of the yarn contact surface 46 is 5 to 10 millimeters for receiving an average strand diameter of 0.5 to 1 millimeter.
  • the strand 14 between the traveler 36 and pig-tail 24 arcs or balloons out a distance about the package 1 2, depending upon the tension being exerted on the strand 14.
  • the traveler 36 preferably has sufficient weight to prevent the strand 14 from interfering with other nearby equipment or processes and from contacting any other equipment surfaces, such as the partition 48, shown in Figs 1 and 2, which separates one winding position from another.
  • the winder 10 can also include a second ring 50 spaced apart from and located above the ring 40 to limit the diameter of the balloon.
  • This second ring 50 is formed from a generally rigid material, such as aluminum. The second ring 50 is generally moved in coordination with the ring 40 as the ring 40 is reciprocated along the axis 42.
  • the winder 10 can further include a traverse drive (not shown) for reciprocating the ring 40 with the traveler 36 and the second ring 50, if present, along the central axis of rotation 42 of the spindle 30 to deposit the strand 14 upon the barrel 26 of the bobbin 28.
  • a traverse drive (not shown) for reciprocating the ring 40 with the traveler 36 and the second ring 50, if present, along the central axis of rotation 42 of the spindle 30 to deposit the strand 14 upon the barrel 26 of the bobbin 28.
  • the ring 40 and second ring 50 are mounted upon a support 52 in a manner that which permits the ring 40 and second ring 50 to maintain a constant distance 54 therebetween during reciprocation.
  • the distance 54 can be 10 to 30 centimeters, and preferably 10 to 20 centimeters, and is determined by such factors as strand mass and feed rate.
  • the support 52 is connected to a motor (not shown) which reciprocates the support 52, ring 40 and second ring 50 along the axis 42 in response to electrical pulses received from a programmable logic controller, e.g. such as are available from Allen Bradley of Milwaukee, Wisconsin.
  • a programmable logic controller e.g. such as are available from Allen Bradley of Milwaukee, Wisconsin.
  • a non-limiting example of a suitable motor is a 1 -1 /2 horsepower Indiana General motor.
  • the reciprocal movement of the rings 40 and 50, the movement of the traveler 36 and the rotation of the spindle 30 all contribute to the pattern in which the strand is placed in layers upon the bobbin 28, otherwise known as the "build".
  • the strands 14 on the outer surface of forming package 1 6 can have a greater amount of the sizing composition than desired due to sizing migration.
  • Sizing migration is a condition wherein as the forming package is dried, constituents of the sizing are drawn toward the outer portion of the forming package and are deposited on the outer fibers at a higher than desired amount, resulting in a higher than desired LOI. It is expected that the LOI resulting from the sizing migration can reach as high as 3.5 times the desired LOI level. As discussed earlier, this higher LOI can adversely affect both the weaving operation and the woven fabric. To solve this problem, the present invention segregates the undesirable yarn from the remaining yarn to be used in the weaving operation.
  • strand 14 is typically wound on bobbin 28 along axis 42 to form a particular pattern that allows all the strand to be removed from the bobbin during a weaving operation before a sensor (not shown) associated with the weaving operation signals that the bobbin is empty, in a manner well known to those skilled in the art and as will be discuss later in more detail.
  • a first quantity of fiber strand 14 is wound about at least a first portion 56 of barrel 26 of the bobbin 28 to form a first, or waste layer 58 on the wound package 12.
  • the portion of the strands 14 having a higher than desired LOI forms the waste layer 58.
  • the configuration and position of the waste layer 58 on barrel 26 of bobbin 28 must be such that the remaining portion of the strands 14 can be unwound from the bobbin 28 during weaving before any strands from the waste layer 58, as will be discussed later in more detail.
  • waste layer 58 is formed on the lower portion 56 of barrel 26. More specifically, the amount of strand determined to be unusable in a subsequent weaving operation is wound only about portion 56 of barrel 26 by controlling the reciprocating movement of support 52 and rings 40 and 50 along the axis 42. As shown in Fig. 1 , ring 40 is moved from the bottom flange 60 of the bobbin 28 to a maximum distance 62 from the bottom flange 60. The shape of the waste layer 58 is determined by the distance the ring 40 moves during each subsequent stoke of support 52.
  • the shape of the waste layer 58 be such that is does not interfere with the formation of a subsequent, overlaying strand layer as discussed below.
  • the shape of waste layer 58 is similar to the shape of the primary layer 64 of strand on the bobbin 28, which is discussed below.
  • a second, or primary layer 64 is built on the bobbin 28.
  • the primary layer overlays at least a portion of the waste layer 58, and preferably the entire waste layer 58, as well as at least a portion of the remaining portion 66 of the barrel 28 of the bobbin 26.
  • the primary layer 64 has an upper portion 70 and a lower portion 72.
  • the upper portion 70 has a length 74 that is less than its overall length 68 of the build and has a generally conical shape.
  • the length 74 of the upper portion 70 is 30% to 70% of the overall length 68, and more preferably 50% of the overall length 68.
  • the lower portion 72 has a length 76 that is less than the overall length 68, preferably 30% to 70% of the overall length 68, and more preferably 50% of the overall length 68.
  • the lower portion 72 has a generally cylindrical shape and is proximate the bottom flange 60 of the bobbin 28.
  • the milk-bottle shape can be formed by winding an initial layer of strand of the primary layer 64 on the barrel 26 of bobbin 28 during an initial stroke of the support 52 along axis 42 from bottom flange 60 to upper flange 78 of the bobbin 28 and back to the bottom flange 60. This initial layer of strand will overlay the waste layer 58.
  • Each successive layer of strands is wound upon the preceding layer and as each successive layer is wound on the bobbin 28, the top of the stroke is lowered so that the stroke is progressively shortened, resulting in a forming package having the milk-bottle shape as shown in Fig. 2. It should be appreciated that other strand winding sequences or arrangements can be used to provide a milk-bottle shaped built. Furthermore, due to the presence of the waster layer 58, the sequence used to form the primary layer can be further modified to provide the desired outer surface configuration of the wound package.
  • the support 52 can remain stationary and the bobbin 28 can be reciprocated along axis 42.
  • An example of a fully wound package prepared using the milk-bottle build is shown in "PPG Fiber Glass Yarn Products and Packaging" at page 3 upon the #53 bobbin.
  • a fabric can be formed by interlacing warp and weft (fill) yarn or strands in a desired pattern using any conventional loom and weaving techniques well known to those skilled in the art.
  • the weaving operation can be performed using a shuttle loom or rapier loom, but preferably an air jet loom, such as but not limited to air jet looms commercially available from Tsudakoma of Japan as Model Nos. 103, 1031 1033 or ZAX; Sulzer Ruti Model Nos. L-5000, L-5100 or L-5200 which are commercially available from Sulzer Brothers LTD. of Zurich, Switzerland; and Toyoda Model No. JAT610.
  • a non-limiting example of a typical air jet loom operation is disclosed in U.S. Patent Application Serial No. 09/170,578, which is hereby incorporated by reference.
  • the warp strands are positioned in a generally spaced apart and parallel orientation along the length of the loom and the fill strands are inserted across the loom into the warp shed.
  • the fill yarn is drawn from a supply package, e.g. a bobbin.
  • a sensing device typically a photoelectric sensor (not shown), is used to detect the uncovering of the bobbin barrel, which normally would indicate that all the strand on the bobbin has been used.
  • the weaving operation is suspended until the empty bobbin is removed and replaced with a full bobbin.
  • bobbin 28 is positioned relative to a loom such that the strand 14 can be unwound from the bobbin 28 and used as the fill strand.
  • the sensor can be directed to detect when portion 66 of the barrel 26 is exposed and send a signal to a control device (not shown) to suspend the weaving operation while there is still strand on portion 56 of the bobbin 28, and more particularly the waste layer 58.
  • a control device not shown
  • the incorporation of the undesirable strand forming the waste layer 58 into the fabric is avoided by suspending the weaving operation after all the strand in the primary layer 64 is used but before any undesirable strand from the waste layer 58 is used. This results in improved fabric quality by eliminating defect attributable to the higher LOI of the strands in the waste layer 58.
  • waste layer 58 can be wound around selected portion of the barrel, and in one embodiment the entire length of barrel 26, in an open pattern that still allows a sensing device to "see" a portion of the barrel when the primary layer 64 of yarn has be removed from the bobbin before the yarn from the waste layer 58 is used in the weaving operation.
  • the removal of the waste layer 58 from the weaving operation improves the weaving efficiency, especially on an air jet loom. More specifically, an air jet loom uses a blast of compressed air to propel the fill strand across the width of the fabric. With its higher LOI, it is more difficult to propel the waste yarn across the loom, resulting in stoppage of the weaving equipment. As a result, elimination of this potential problem improves the weaving efficiency.
  • Fig. 3 shows a non-limiting alternate configuration typically referred to as a biconal, or pirn, build.
  • wound package 100 has a build that includes a generally cylindrically shaped central portion 102 and tapered end portions 104 and 106.
  • package 100 includes a waste layer 108 that is spaced from the opposing ends of the bobbin and is completely enclosed by a primary layer 1 10.
  • the waste and primary layers are formed in a manner as taught herein.
  • the waste layer 108 is centered generally along a central portion 1 12 of barrel 1 14 of bobbin 1 16.
  • barrel portions 1 18 and/or 120 will be exposed before the waste layer 108 is unwound.
  • the sensors can be positioned to detect an exposed barrel portion and suspend the weaving operation before strand from the waste layer 108 can be incorporated into the woven fabric, in a manner as discussed above.
  • the present invention is particularly applicable for yarns comprising glass fibers coated with a coating that is compatible with a resin matrix material into which the yarn is incorporated.
  • the terms "compatible with a resin matrix material” or “resin compatible” mean the coating composition applied to the glass fibers is compatible with the resin matrix material into which the glass fibers will be incorporated such that the coating composition (or selected coating components) achieves at least one of the following properties: does not require removal prior to incorporation into the matrix material (such as by de-greasing or de-oiling), facilitates good penetration of the matrix material through the individual bundles of fibers in a mat or fabric incorporating the yarn and good penetration of the matrix material through the mat or fabric during conventional processing and results in final composite products having desired physical properties and hydrolytic stability.
  • one embodiment of the resin compatible coating composition on the glass fibers comprises one or more, and preferably a plurality of particles that when applied to the fibers adhere to the fibers and provide one or more interstitial spaces between adjacent glass fibers.
  • preferred particles include hexagonal boron nitride and hollow st ⁇ rene acrylic polymeric particles.
  • a nonlimiting embodiment of the resin compatible coating composition preferably comprises one or more film- forming materials, such as organic, inorganic and polymeric materials.
  • film-forming materials include vinyl polymer, such as, but are not limited to, polyvinyl p ⁇ rrolidones, polyesters, polyamides, polyurethanes, and combinations thereof.
  • a nonlimiting embodiment of the resin compatible coating compositions can include one or more glass fiber coupling agents such as organo-silane coupling agents, transition metal coupling agents, phosphonate coupling agents, aluminum coupling agents, amino- containing Werner coupling agents and mixtures thereof.
  • glass fiber coupling agents such as organo-silane coupling agents, transition metal coupling agents, phosphonate coupling agents, aluminum coupling agents, amino- containing Werner coupling agents and mixtures thereof.
  • a nonlimiting embodiment of the resin compatible coating compositions can further comprise one or more softening agents or surfactants.
  • softening agents include amine salts of fatty acids, alkyl imidazoline derivatives, acid solubilized fatty acid amides, condensates of a fatty acid and polyethylene imine and amide substituted polyethylene imines.
  • a nonlimiting embodiment of the resin compatible coating compositions can further include one or more lubricious materials that are chemically different from the polymeric materials and softening agents discussed above to impart desirable processing characteristics to the fiber strands during weaving.
  • lubricious materials include cetyl palmitate, cetyl myristate, cetyl laurate, octadec ⁇ l laurate, octadecyl myristate, octadecyl palmitate and octadecyl stearate.
  • the lubricious materials can also include non- polar petroleum waxes and water-soluble polymeric materials, such as but not limited to polyaik ⁇ lene polyols and polyoxyalkylene polyols.
  • a nonlimiting embodiment of the resin compatible coating compositions can additionally include one or more emulsifying agents for emulsifying or dispersing components of the coating compositions, such as the particles and/or lubricious materials.
  • suitable emulsifying agents or surfactants include polyoxyalkylene block copolymers, ethoxylated alkyl phenols, polyoxyethylene octylphenyl glycol ethers, ethylene oxide derivatives of sorbitol esters, polyoxyethylated vegetable oils, ethoxylated alkylphenols, and nonylphenol surfactants.
  • resin compatible coating compositions such as crosslinking materials, plasticizers, silicones, fungicides, bactericides and anti-foaming materials.
  • organic and/or inorganic acids or bases in an amount sufficient to provide the coating composition with a pH of 2 to 10 can also be included in the resin compatible coating composition.
  • Nonlimiting examples of resin compatible coatings are shown in Table 1.
  • EMERY® 6717 partially amidated polyethylene imine which is commercially available from Cognis Corporation of Cincinnati, Ohio.
  • MACOL OP-10 ethoxylated alkylphenol; this material is similar to MACOL OP-10 SP except that OP-10 SP receives a post treatment to remove the catalyst; MACOL OP-10 is no longer commercially available.
  • ROPAQUE® OP-96 0.55 micron particle dispersion which is commercially available from Rohm and Haas Company of Philadelphia, Pennsylvania.
  • SAG 10 antiforming material which is commercially available from CK Witco Corporation of Greenwich, Connecticut.
  • PLURONICTM F-108 polyoxypropylene-polyoxyethylene copolymer which is commercially available from BASF Corporation of Parsippany, New Jersey.
  • ICONOL NP-6 alkoxylated nonyl phenol which is commercially available from BASF Corporation of Parsippany, New Jersey.
  • POLYOX WSR 301 poly(ethylene oxide) which is commercially available from Union Carbide Corp. of Danbury, Connecticut.
  • SERMUL EN 668 ethoxylated nonylphenol which is commercially available from CON BEA, Benelux.
  • EXAMPLE 1 A 20.5 pound milk bottle-shaped package 12 was wound with a G-75 glass fiber strand on an RTM01 twist frame, which is commercially available from ICBT. The strand 14 was wound about a type # 53 bobbin which is shown in "PPG Fiber Glass Yarn Products and Packaging" at pages 3-4. The forming package 16 was rotated such that the strand 14 was fed to the winder 10 at a rate of 120 to 150 meters/minute. The bobbin 28 was rotated at a speed of 3500 to 4000 rpm. The typical winding time for winding such a package is 800 to 1000 minutes.
  • the waste layer 58 was formed from the first 0.5 pounds of strand wound from the forming package 16.
  • the waste layer 58 was formed on the lower half of the bobbin barrel 28 by programming the winder controller to initially reciprocate support 52 between the bottom flange 60 and a point midway between flanges 60 and 78. During each successive stroke of the support 52, the distance it traveled from lower flange 60 was shortened so as to begin forming a milk-bottle shaped layer. After the initial 0.5 pounds of strand were wound on the bobbin 28, the winder controller changed the stroke length of support 52 so that the primary layer 64 could be formed along the entire length of the bobbin 28 in a manner as discussed earlier.

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  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)

Abstract

L'invention concerne un procédé d'enroulement d'un paquet de fibres sur une bobine afin de former un enroulement comprenant: (a) l'enroulement d'une première couche (58) de paquet de fibres possédant une première propriété concernant un rouleau de bobine (28) de manière à ce que, au moins, une première partie (56) du fût soit couverte par cette première couche (58) de paquets de fibres et au moins une seconde partie (66) du fût ne soit pas recouverte par cette première couche (58) de paquets de fibres; et (b) l'enroulement d'une seconde couche (64) de paquets de fibres possédant une seconde propriété, différente de la première concernant le fût de la bobine (28), de manière à ce que la seconde couche (64) de paquets de fibres recouvre au moins la seconde partie (66) du fût de la bobine, afin de former un enroulement (12). Lorsque le premier et le second paquets de fibres sont dévidés de la bobine (28), la seconde partie (66) du fût sera exposée avant la première partie (56) du fût. Dans l'un des modes de réalisation non-limitatifs, la seconde couche (64) de paquets de fibres recouvre complètement la première couche de (58) paquets de fibres et les paquets de fibres dans la première couche (58) possèdent une perte à l'allumage supérieure à la perte des paquets de fibres dans la seconde couche (64).
PCT/US2000/024908 1999-09-14 2000-09-12 Enroulement de paquets de fibres et procede d'enroulement de ces derniers sur une bobine Ceased WO2001019713A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU73700/00A AU7370000A (en) 1999-09-14 2000-09-12 Wound fiber strand package and process for winding fiber strand on a bobbin

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US15381899P 1999-09-14 1999-09-14
US60/153,818 1999-09-14
US65686000A 2000-09-07 2000-09-07
US09/656,860 2000-09-07

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WO2001019713A1 true WO2001019713A1 (fr) 2001-03-22

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1330989A (fr) * 1962-06-25 1963-06-28 Halstenbach & Co Canette et dispositif pour sa préparation
GB1347186A (en) * 1971-11-29 1974-02-27 Owens Corning Fiberglass Corp Sizing composition and glass fibres sized therewith
JPS60262775A (ja) * 1984-06-06 1985-12-26 Nitto Boseki Co Ltd ガラス繊維パツケ−ジ及びガラス繊維処理方法
EP0582234A2 (fr) * 1992-08-06 1994-02-09 NITTO GLASS FIBER mfg. Co., Ltd. Bobine de fibres avec faible résistance à l'abrasion et son procédé de fabrication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1330989A (fr) * 1962-06-25 1963-06-28 Halstenbach & Co Canette et dispositif pour sa préparation
GB1347186A (en) * 1971-11-29 1974-02-27 Owens Corning Fiberglass Corp Sizing composition and glass fibres sized therewith
JPS60262775A (ja) * 1984-06-06 1985-12-26 Nitto Boseki Co Ltd ガラス繊維パツケ−ジ及びガラス繊維処理方法
EP0582234A2 (fr) * 1992-08-06 1994-02-09 NITTO GLASS FIBER mfg. Co., Ltd. Bobine de fibres avec faible résistance à l'abrasion et son procédé de fabrication

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 142 (M - 481) 24 May 1986 (1986-05-24) *

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