EP0028844B1 - Polypropylen-Filamentgarn und Verfahren zu dessen Herstellung - Google Patents

Polypropylen-Filamentgarn und Verfahren zu dessen Herstellung Download PDF

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Publication number
EP0028844B1
EP0028844B1 EP19800107011 EP80107011A EP0028844B1 EP 0028844 B1 EP0028844 B1 EP 0028844B1 EP 19800107011 EP19800107011 EP 19800107011 EP 80107011 A EP80107011 A EP 80107011A EP 0028844 B1 EP0028844 B1 EP 0028844B1
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EP
European Patent Office
Prior art keywords
yarn
draw
filaments
yarns
twist
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Expired
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EP19800107011
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English (en)
French (fr)
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EP0028844A2 (de
EP0028844A3 (en
Inventor
Charles Sidney Hatcher
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Phillips Petroleum Co
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Phillips Petroleum Co
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    • 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
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
    • D01F6/06—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins from polypropylene
    • 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
    • D01D5/12—Stretch-spinning methods
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics

Definitions

  • the present invention relates to a process for making fibrous polyolefin products by melt spinning and products thereof.
  • fibrous polyolefins particularly polypropylene
  • fibrous polyolefins have peculiarities not possessed by other synthetic fibers, which often limit the processability of such materials and limit the end uses to which the products can be applied.
  • the processability limitations result in relatively low extrusion, spinning and wind-up speeds.
  • high breakout rates are experienced and further processing of the spun fibers is limited, to the extent that inconsistent texture, broken filaments, lack of color control and difficulty in knitting and weaving are often encountered.
  • melt spinning polyolefins also have relatively high spun denier, low tenacity, low birefringence, high elongation, high boiling water shrinkage, low modulus of elasticity, as well as other limitations which limit the uses to which the fibrous materials can be applied. It is also recognized that polyolefin fibers cannot generally be utilized in their as-spun state, i.e., with little or no further processing.
  • the British Patent 827 409 broadly describes melt spinning of isotactic polypropylene.
  • the reference does not provide means for providing a filament yarn from polypropylene having the combined high birefringence, high tenacity and elongation desired.
  • Another object of the present invention is to provide a process for producing melt spun, fibrous polyolefin products and fibrous polyolefin products which can be utilized with little or no additional processing.
  • Another object of the present invention is to provide an improved process for producing fibrous polyolefin products which can be carried out at relatively high speeds, particularly higher speeds of extrusion, spinning and wind-up.
  • Another and further object of the present invention is to provide an improved process for producing fibrous polyolefin products which result in products of a low spun denier with consequent lower draw ratios and improved products thereof.
  • Yet another object of the present invention is to provide an improved process for producing fibrous polyolefin products of improved processability, particularly reduced breakout, higher draw ratios, higher and more constant twist levels during false twist texturing, better ease of handling in knitting, weaving, etc., improved color control and improved products thereof.
  • a still further object of the present invention is to provide fibrous polypropylene products having a low spun denier, high tenacity, high birefringence, low elongation, low boiling water shrinkage, high modulus of elasticity and/or high break strength.
  • a still further object of the present invention is to provide fibrous polyolefin products of improved coherency and/or bulkiness.
  • novel polyolefin filament products are produced by melt spinning a polyolefin having a molecular weight distribution of less than 7 (a MW/MN ratio determined by gel permeation chromatography) and a melt flow of between 20 and 60 which are useful in their as-spun condition without further processing and have high tenacity, high birefringence and low elongation.
  • the novel products can be converted to other useful products by one or more additional processing steps, including improving the coherency and/or bulkiness by heat setting, texturing, jet texturing such as using a Taslan jet, plying, entangling, and cutting into staple.
  • Still another aspect of the process includes drawing the melt spun fibers, twist-drawing, draw-texturing, draw-twisting, draw- winding, and/or draw-entangling.
  • the process of the present invention comprises producing polyolefin, particularly polypropylene, filament products by melt spinning a polypropylene having a molecular weight distribution of less than 7 and a melt flow between 20 and 60.
  • melt flow refers to the weight in grams of the polymer which can be extruded within a particular time under a constant dead weight load at a given temperature as determined by ASTM-D-1238, Condition "L”.
  • as-spun refers to the filament products of the invention in their condition when taken up on the first wind up package after having been melt spun.
  • Various terms have been used in the art to designate treatments of a plurality of collected filaments or a yarn and a plurality of yarns to improve the coherency of the filaments and/or improve the bulk of the yarn.
  • the results produced and the terminology applied depends upon the condition of treatment, such as air pressure, the direction of the air jet relative to the path of yarn travel and the relative tension being applied to the yarn during treatment.
  • the term "Taslan texturing" (Tasian is a trademark of E. I. DuPont de Nemours and Company) as used herein is meant to refer to a process and product in which a jet or jets of air are directed against the yarn, usually in the direction of travel of the yarn, forming a turbulent region, the speed or tension on the yarn is greater at the entrance to the jet than at the exit (net overfeed) and the filaments of the resultant product have a multitude of ring-like loops, coils and whorls at random intervals along their lengths.
  • entangling or "intermingling”, sometimes called “interlacing” as used herein, refers to a process and product in which a jet or jets of air are directed against the yarn or yarns, usually at a 90° angle to the yarn path, the speed or tension on the yarn is substantially the same at the entrance and exit of the intermingler and the resultant product has a high degree of intermingling or entangling of the filaments but is substantially free of loops, coils and whorls.
  • "plying” is used to refer to a process and products in which two or more yarns are formed into a single yarn by twisting or intermingling in a jet.
  • melt drawing or simply “draw” refers to a process in which filaments or yarns are drawn or stretched (with or without heat and during or after windup) after the spun filaments have solidified as opposed to drawing which occurs during the spinning of the filaments and before the solidification thereof. Stretching which occurs while spinning and before the filaments have solidified will be referred to as “melt drawing” and the products thereof as “partially oriented” products.
  • finish indicates a liquid composition applied to the yarn during melt spinning that acts as a lubricant and imparts desirable characteristics to the yarn.
  • melt spinning is carried out at a take-up speed within the range of about 1200 to 5000 meters per minute and still more preferably between about 1500 and 4000 meters per minute.
  • unique products are obtained by melt spinning, carried out at take-up speeds , in the range of 800-1200 meters per minute, draw-texturing at least three of the yarns as spun with the direction of twist for two yarns being different from the third, then plying the yarns in an interlacing jet.
  • the product of this embodiment is simultaneously draw-textured at a draw ratio of 4.0 to 1 to 2.0 to 1.
  • the products produced in accordance with the present invention have a number of advantageous characteristics not heretofore present in melt spun polyolefins.
  • the polyolefin filaments have a spun denier below about 25 per filament.
  • the products In the as-spun condition, the products have a high birefringence, usually in excess of about 0.015.
  • the products also have low elongations between about 100 and 350 percent as measured by ASTM Method 2256 and preferably in the range of about 100 to 250 percent.
  • drawn filament materials can be produced having conventional spun deniers but which are drawn at lower draw ratios.
  • the as-spun products also have a high tenacity above about 2.4 grams/denier and, to the extent that the filament materials are further processed by drawing or twisting, higher cold draw ratios may be utilized. For example, draw ratios within the range of 2.0/1 to 4.0/1 can be utilized.
  • polyolefin filament products of the present invention are useful in their as-spun condition, these products can be further processed by a wide variety of treatments to form the same into yarns of desired characteristics for use in a variety of textile products, such as woven or nonwoven material, tufted products and the like.
  • the products may be heat set and entangled.
  • Such processes to improve the coherency may be performed during the spinning operation (prior to winding up) or after collecting the fibers and winding the same.
  • Excellent products can also be produced by crimping, such as steam crimping, or stuffer box crimping and cutting the crimped materials into staple.
  • the as-spun products of the present invention can also be further improved by subjecting the same to further processing which includes cold drawing. Such processing can involve spin-drawing, twist-drawing, false-twist texturing, draw-texturing, draw-twisting, and draw-Taslan texturing.
  • the preferred polyolefin, fiber-forming materials for use in accordance with the present invention are homopolymers of polypropylene.
  • a fiber-forming resin comprising a copolymer of propylene with a small amount (less than 15%) of an olefinic monomer, such as ethylene, butene or a diene monomer, such as butadiene, isoprene, etc, may be employed.
  • a fiber-forming resin blend composed of a predominant amount of a propylene polymer and a small amount (less than 15%) of at least one polymer of the above mentioned olefinic or diene compound may be used.
  • polypropylene as used herein is intended to include the propylene homopolymers, polymer blends and copolymers mentioned above.
  • the fiber forming resin it is preferable to employ a crystalline polypropylene homopolymer having a molecular weight distribution of less than 7 and a melt flow of between 20 and 60.
  • a plurality of filaments are melt spun from spinneret 10.
  • the filaments 12 then pass through a quench zone 14 where they are cooled by blowing air therethrough.
  • Applicator 56 applies a finish to the yarn.
  • the filaments 12 then pass through converging guide 16 where they are collected to form a yarn 18.
  • Converging guide 16, as will appear hereinafter, may be a pigtail type eyelet, a slotted roller, or any conventional converging or collecting means.
  • the yarn 18 than passes to a conventional winder wherein traversing guide 20 moves laterally to wind the yarn and form a package 22.
  • the drawing that occurs between the spinneret 10 and the take-up package 22 provides partial orientation of the yarn.
  • filaments and yarn made in accordance with the present invention are useful for various purposes in their as-spun condition with no subsequent processing or treatment other than that shown in Figure 1.
  • Figure 2 of the drawings shows another embodiment of the present invention wherein yarn, produced in accordance with Figure 1, is further processed by twist-drawing.
  • a yarn package 22, such as that produced in Figure 1 is mounted on twister 24.
  • the yarn is drawn off package 22 . and passes through pretension gate 26, thence through the core of package 22 and through rotatable spindle 28.
  • Rotatable spindle 28 is attached to shaft 30 which is driven by belt 32.
  • Twister 24 is referred to as a "two-for-one twister" in that it inserts two turns of true twist for each rotation of spindle 28.
  • the twisted yarn then passes through guide elements 34 and 36.
  • the yarn is wrapped several times about feed rolls 42 and several times about draw rolls 46 which operate at speed greater than rolls 42 and thus draw or stretch the yarn in the zone between the rolls.
  • the drawn yarn can pass over heater 44 to rolls 46 to heat the yarn during drawing, or the rolls 42 and 46 can be heated, eliminating the need for hot plate heater 44.
  • From draw rolls 46 the yarn passes over stationary guide 48 and thence through traverse guide 50 of a winder, which ultimately forms package 52.
  • a more detailed description of the operation shown in Figure 2 can be found in U.S. Patent 4,122,667.
  • Figure 3 illustrates a modification of the present invention in which one or more treatments are given to the as-spun yarn 18 to improve the coherency and/or bulkiness of the filaments of the yarn. These treatments include entangling the yarn and/or heat setting the yarn.
  • the plurality of filaments 12 pass over ceramic guide 54 where they are collected or converged, in the same manner as in eyelet-type converging guide 16 of Figure 1, to form the yarn 18.
  • the yarn 18 may then be passed over applicator 56 which applies a finish to the yarn and thereby improves the coherency of the filaments of the yarn and acts as a lubricant during processing.
  • Finish applicator 56 is what is known as a "kiss roll".
  • the yarn 18 then passes over ceramic guide 58 and thence to godet rolls 60. From godet rolls 60 the yarn passes through a jet type entangler 62. Entangler 62 may be of the type shown and described in U.S. Patent 2,783,609. In this type of entangler the filaments of the yarn are intermingled, but have no significant coils, loops or whorls, by a high velocity air jet. This treatment improves the coherency of the filaments of the yarn for windup. The entangled yarn then passes to winder 64 where it is wound on package 66.
  • the finish applicator 56 and entangler 62 may be used alone or in combination and that either or both may be placed in any of a number of different positions between converging guide 54 and winder 64.
  • the yarn package 66 may be placed in an autoclave 68 where the yarn is heat set at about 120°C.
  • the heat-set yarn also has improved coherency of the filaments when used alone or it may be used in combination with the application of a finish and/or entangling.
  • Figure 4 of the drawings illustrates yet another embodiment of the present invention wherein the yarn 18, as produced in Figure 1, is subjected to a subsequent treatment involving draw-texturing.
  • the yarn 18 passes around input rolls 70 thence about hot pin 72 or across an appropriate hot plate and finally around draw rolls 74 which are rotated at a speed greater than input rolls 70 to thereby stretch or draw the yarn.
  • the drawn yarn then passes over a plate-type first stage heater 76. From heater 76 the yarn passes through a disc-type, false-twist spindle 78. From disc-type false-twist spindle 78 the yarn passes between intermediate rolls 80 and thence to second stage heater 82. From second stage heater 82 the yarn passes through output rolls 84 and thence to takeup package 86 which is driven by package drive roll 88.
  • a conventional false twist spindle could be substituted for the disc type illustrated here and in the other embodiments.
  • Figure 5 of the drawings illustrates an alternative form of the method of Figure 4 which is referred to in the art as simultaneous draw-texturing. It is to be observed that the process of Figure 5 differs from that of Figure 4 only to the extent that hot pin 72 and rolls 80 are eliminated and the yarn is heated and drawn simultaneously with the insertion of false twist to the yarn by positioning draw rolls 74 downstream of disc-type false-twist spindle 78.
  • Figure 6 of the drawings although schematic in nature, shows in somewhat greater detail the false twist texturing operation and graphically illustrates why it is referred to as "friction" false twisting.
  • the yarn 18 passes over first stage heater 76 and thence to disc-type false-twist spindle 78, illustrated as an array of rotating friction discs that impart false twist to the yarn.
  • first stage heater 76 to disc-type false-twist spindle 78 twist is inserted and heat set in the yarn.
  • a cooling zone makes up the lower or downstream portion of the twist-heat-set zone.
  • the yarn After passing through disc-type false twist spindle 78 and thence to intermediate feed rolls 80, the yarn is untwisted. Since the previous treatment twisted the yarn and heat set this twist the untwisting will not straighten the elements or filaments but instead results in a yarn whose coherency and bulkiness are improved by the false twisting.
  • Figure 7 of the drawings illustrates yet another embodiment of the present invention wherein a yarn is formed by a simple spin-draw operation.
  • the yarn 18, formed by passage over converging guide 54 passes over feed rolls 90, thence to heater 92 and draw rolls 94, operating at a higher speed than rolls 90.
  • Figure 8 of the drawings shows yet another after-treatment to which the as-spun yarn of Figure 1 can be subjected.
  • the operation of Figure 8 is what is generally referred to as draw-twist.
  • the yarn 18 from package 22 passes over feed rolls 96, over heater 98 and thence over draw rolls 100.
  • the latter are operated at a speed higher than the speed of feed rolls 96 to thereby stretch or draw the yarn.
  • the drawn yarn then passes through guide 102 and thence to rotatable flyer 104 which winds the yarn up on pirn 106. As flyer 104 rotates, it inserts true twist in the yarn.
  • Figure 9 illustrates an after treatment of the as-spun yarn produced in Figure 1 wherein the yarn 18 is draw-Taslan textured as an effect yarn and combined with a core yarn 19.
  • the yarn 18 from package 22 is passed through a draw zone comprising feed rolls 108, heater 110 and draw rolls 112 and feed rolls 113. From the draw zone the yarn 18 is passed to a Taslan jet 114. Core yarn 19 from package 23 is passed by feed rolls 115 operating at a slower speed than rolls 113 to Taslan jet 114.
  • the yarns in passing through Taslan jet 114 are subjected to turbulence in a high velocity air stream and separated from the air stream by being jetted against baffle 116 and then turned in a generally perpendicular path. Due to the overfeed of yarn 18, it becomes the effect yarn. Passage through the jet 114 results in the filaments of the yarn forming loops, rings and whorls therein and effecting some intermingling of the filaments.
  • the yarns are under tension as they enter Taslan jet 114 and as the core and effect yarn 119 exits Taslan jet 114 it is traveling at a reduced speed and this reduction in tension during the turbulence contributes to the formation of the loops, etc.
  • the yarn 119 then passes through guide 118 to takeup rolls 120, thence through traverse guide 122 of a winder and onto a package 124.
  • Taslan jet 114 is of the type well known in the art and will not be further described herein.
  • the embodiment of the present invention shown in Figure 10 subjects the yarn 18, produced in accordance with Figure 1, to a subsequent treatment involving crimping of the yarn and, optionally, cutting the crimped yarn into staple.
  • the yarn 18 is fed to crimper 126 which comprises feed rolls 128 and stuffer box 130.
  • the specific crimper shown is a steam crimper and a preferred steam crimper is shown and described in U.S. Patent 3,911,539.
  • the crimped yarn passes to J-box 132, over tensioning rolls 134 and thence to staple cutter 136.
  • Staple cutter 136 cuts the crimped yarn into short fibers or staple which are then passed to bailer 138.
  • additional finish may be applied to the-yarn prior to passage through crimper 126 and the yarn may be cold drawn prior to the crimping operation.
  • Figure 11 of the drawings illustrates a novel technique for forming a plied and interlaced yarn from a plurality of draw-textured yarns produced in accordance with the draw-texturing operations illustrated in Figures 4, 5, and 6.
  • a plurality of yarns are simultaneously draw-textured as illustrated in Figure 5.
  • three separate yarns 18A, 18B and 18C, respectively, are simultaneously draw-textured by passing the same through disc-type false-twist spindles 78A, 78B and 78C, draw rolls 74A, 74B and 74C, second stage heaters 82A, 82B and 82C and output rolls 84A, 84B and 84C.
  • the draw-texturing devices are shown as offset in Figure 11, for clarity of illustration only, it is to be understood that units A, B and C would be in side-by-side relationship in actual operation.
  • the draw-textured yarns 18A, 18B and 18C are thereafter passed through an entangling or interlacing device 140 which plies the yarns together.
  • the interlacer 140 is the same type entangler or interlacer as 62, referred to in the description of Figure 3 for a single yarn.
  • Interlacer 140 generally comprises a tube through which a plurality of yarns are fed. The tube through which the yarns pass is provided with air from an annular plenum zone supplied with air by means of air supply 142.
  • the interlacer is provided with a slot 144, which is preferably at an angle so as to aid in retention of the yarns in the yarn tube.
  • the interlaced yarn then is wound up on takeup package 146 driven by package drive roll 148.
  • the system of Figure 11 is particularly useful in the production of a heather-type yarn, in which three different colors of yarn are plied by interlacing. Specifically, it has been found, in accordance with the present invention, that, in a system such as that of Figure 11, if a plurality of yarns to be interlaced are all twisted in the same direction this results in a high torque being applied to the yarns.
  • Runs 1 to 12, 19, 20, 22 and 25 utilized a 12x48 mil spinnerette with 325 mesh screen (0.044 mm). Runs 1 to 12 utilized a spin temperature of 293°C and runs 19, 20, 22 and 25 a spin temperature of 246°C. Since some difficulties in spinning and quenching were encountered and it appeared desirable to spin resin B at lower spin speeds for comparison runs 13 through 18, 21, 23, 24 and 26 were spun at 254°C spin temperature through a 32-hole-0.03x0.12 cm 0.012x0.048 inch spinnerette and utilizing quench air at 24.4 m/min (80 ft/min).
  • Runs 44 through 57 were spun, utilizing a spinnerette having 0.012x0.048 inch holes at a spin temperature of 312°C.
  • Runs 27 through 35 were run at a spin temperature of 250°C, a nominal godet speed (spin speed of 2500 meters/minute) and utilizing quench air at 24.4 m/min (80 ft/min).
  • finish C as in Table V was applied to the collected filaments at a rate of 1% by weight and comprised 86.63% Nopcolube 2152P (Diamond Shamrock, Morristown, N.Y.), 13.32% ethoxylated cetyl/stearyl alcohol (25 moles ethylene oxide per molecule) and 0.05% of Givgard DXN (sold by Givaudin Corp. of Clifton, N.J.) an antimicrobial preservation agent.
  • the melt flow listed in Table I is "melt spun melt flow” or the melt flow as measured after melt spinning.
  • the resin melt flow of relatively low resin melt flow polymers will differ significantly from the melt spun melt flow but with relatively high resin melt flow polymers the melt spun melt flow will not change appreciably.
  • Polymer B was melt spun using a 70 hole 0.051 xO.051 cm (0.020x0.020 inch) hole spinnerette and a 360 mesh screen in an effort to make yarn having a total denier of 300. Quench air was 24.4 m/min (80 ft/min).
  • a finish C was applied to the yarn at a rate of 1% by weight and comprised 86.63% Nopcolube 2152P (Diamond Shamrock, Morristown, N.J.) 13.32% Ethoxylated cetyl/stearyl alcohol (25 moles ethylene oxide per molecule) and 0.05% Givgard DXN. The yarns were also heat set for 5 hours at the temperature indicated. These runs and the physical properties of the yarn are set forth in Table III below.
  • Run 63 is rather meaningless since the supply of polymer began to run out at the end of the run. Also problems of lost filaments occured in the spinning at 3500 m/min. However, the data clearly indicates that heat setting does reduce the elongation and shrinkage significantly. In spite of the spinning problems at 3500 m/min. it can also be seen that the higher speed (3500 m/min.) produces a yarn of higher tenacity and lower elongation than spinning at the lower speed (2500 m/min.).
  • a Scragg, 12 ceramic disc friction texturing machine was utilized, with temperatures of 150°C at both the first and second heaters. Twist and contraction factor were measured on snatched samples. Overfeed was 12% to the setting zone. Denier was calculated at the draw roll using the formula: The speed of the draw roll was 297 m/min. at D/Y 1.56 and 272 m/min. at D/Y 1.71.
  • 600 spun denier yarn of polymer N had broken filaments at a draw ratio of 2.622 and D/Y of 1.56 and would not run at higher draw ratios and D/Y's.
  • polymer M was false-twist, draw-textured in a variety of colors to produce 250 denier through the 34-hole spinnerette. All samples were spun at 800 as-spun denier and at 800 m/minute. Draw-texturing conditions were at a draw ratio of 3.413, D/Y of 1.71, 272 m/min., heater temperatures of 150°C and an overfeed across the second heater (to setting zone) of 12%. Two different finishes, namely, the previously described finishes B and C, were applied in some runs.
  • Table V lists the as-spun properties.
  • Table VII sets forth the properties of the individual yarns and the two composite yarns.
  • the composife yarns were also knit and woven into fabrics without difficulty.
  • the knit sample was boiled off and developed good bulk and pleasing hand.
  • the composite yarns could be used in hand knit items, upholstery fabrics, etc.
  • This yarn, a twist-drawn yarn from polymer A and a core yarn from polymer A were Taslan textured at a core feed rate of 187 m/min., an effective feed rate of 337 m/min. and a take-up speed of 182 m/min.
  • the yarn was also run side-by-side with a commercial yarn with the speed being the maximum to get acceptable bonding with the core in the commercial yarn. Inspection of the yarns indicated that the yarn of the present invention tangled with the core yarn better than the commercial yarn.
  • the yarns produced were then drawn on the apparatus of Figure 2 under varied heat conditions during draw, namely, utilizing heated draw rolls, cold draw rolls and a hot 25.4 cm (10-inch) plate operating at either 140°C or 120°C, and cold draw rolls with no heating of any type. Drawing was conducted at a speed of 800 m/min. and with 7 and 6-1/2 wraps around the feed rolls and draw rolls, respectively. Table X sets forth the properties of the yarns produced.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)

Claims (14)

1. Verfahren zur Herstellung eines Filamentgarns unter Schmelzspinnen von Polypropylen, Aufbringen einer Appretur und Aufnehmen des Filamentgarns bei einer Geschwindigkeit von mehr als etwa 800 Metern pro Minute, dadurch gekennzeichnet, daß man das Verfahren mit einem Polypropylen durchführt, das eine Molekulargewichtsverteilung von weniger als 7 und einen Harz-Schmelzfluß zwischen 20 und 60 aufweist.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man eine Aufnahmegeschwindigkeit von mehr als etwa 1200 Metern pro Minute anwendet.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß man eine Aufnahmegeschwindigkeit zwischen 1500 und 4000 Metern pro Minute anwendet.
4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man die Filamente vor dem Aufnehmen verwirbelt.
5. Verfahren nach Anspruch 1 oder 4, dadurch gekennzeichnet, daß man die Filamente zusätzlich zwirn verstreckt.
6. Verfahren nach Anspruch 1 oder 4, dadurch gekennzeichnet, daß man die Filamente zusätzlich thermofixiert.
7. Verfahren nach Anspruch 1 oder 4, dadurch gekennzeichnet, daß man die Filamente zusätzlich durch Falschdrahtzwirnen nacheinander strecktexturiert.
8. Verfahren nach Anspruch 1 oder 4, dadurch gekennzeichnet, daß man die Filamente zusätzlich gleichzeitig strecktexturiert.
9. Verfahren nach Anspruch 1 oder 4, dadurch gekennzeichnet, daß man die Filamente zusätzlich streckverzwirnt.
10. Verfahren nach Anspruch 1 oder 4, dadurch gekennzeichnet, daß man die Filamente zusätzlich Taslan-strecktexturiert.
11. Verfahren nach Anspruch 1 oder 4, dadurch gekennzeichnet, daß man die Filamente zusätzlich stauchkräuselt und in Stapelfasern schneidet.
12. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man eine Vielzahl der Garne unter Umkehrung der Verzwirnungsrichtung von aufeinanderfolgenden Garnen durch Falschdrahtverzwirnen strektexturiert und die Garne danach in einem Verwirbelungsstrom facht.
13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß man die Vielzahl von Garnen bei einem Streckverhältnis zwischen 2 zu 1 und 4 zu 1 gleichzeitig strecktexturiert.
14. Polypropylen-Filamentgarn-Produkt, erhalten nach dem Verfahren nach einem der Ansprüche 3 bis 13 unter Einsatz einer Aufnahmegeschwindigkeit zwischen 1500 und 4000 Metern pro Minute, weiter gekennzeichnet durch eine Doppelbrechung von mehr als etwa 0,015, eine Festigkeit von mehr als etwa 2,4 Gramm pro Denier, eine Dehnung zwischen 100 und 350 Prozent und ein Denier pro Filament von weniger als etwa 25.
EP19800107011 1979-11-13 1980-11-13 Polypropylen-Filamentgarn und Verfahren zu dessen Herstellung Expired EP0028844B1 (de)

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US9333979A 1979-11-13 1979-11-13
US93339 1979-11-13

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EP0028844A3 EP0028844A3 (en) 1981-12-16
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JP (1) JPS5685417A (de)
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Publication number Priority date Publication date Assignee Title
JPS5830214A (ja) * 1981-08-18 1983-02-22 Mitsubishi Electric Corp 音響情報発生装置
DE3151322C2 (de) * 1981-12-24 1983-11-10 Fa. Carl Freudenberg, 6940 Weinheim "Verfahren zur Herstellung von Polypropylen-Spinnvliesen mit niedrigem Fallkoeffizienten"
DE3151294C2 (de) * 1981-12-24 1986-01-23 Fa. Carl Freudenberg, 6940 Weinheim Polypropylen-Spinnvliesstoff mit niedrigem Fallkoeffizienten
IT1203862B (it) * 1987-04-06 1989-02-23 Paolo Bert Procedimento di filatura e stiro in continuo di filati sintetici e relativo impianto di produzione
GB8716243D0 (en) * 1987-07-10 1987-08-19 Courtaulds Plc Yarns
JPH01246413A (ja) * 1988-03-25 1989-10-02 Idemitsu Petrochem Co Ltd ポリオレフィン系繊維の製造方法
CN1037183C (zh) * 1991-07-13 1998-01-28 中国科学院化学研究所 聚丙烯树脂组合物及其制造方法
TW275076B (de) * 1992-12-02 1996-05-01 Hoechst Ag
IT1274503B (it) * 1995-05-15 1997-07-17 Montell North America Inc Fibre poliolefiniche ad elevata tenacita'
FR2742168B1 (fr) 1995-12-08 1998-01-16 Novalis Fibres Fibres a frisure permanente et procede de fabrication de ces fibres
JP4002684B2 (ja) * 1998-11-09 2007-11-07 日本ポリプロ株式会社 高耐熱性ポリプロピレン繊維
TW579394B (en) * 2001-04-24 2004-03-11 Rhodia Industrial Yarns Ag Process for the production of fine monofilaments made from polypropylene, fine monofilaments made from polypropylene, and their application
CN111612722B (zh) * 2020-05-26 2023-04-18 星际（重庆）智能装备技术研究院有限公司 基于简化Unet全卷积神经网络的低照度图像处理方法

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GB827409A (en) * 1957-06-03 1960-02-03 Ici Ltd Production of polypropylene filaments
DE2501564A1 (de) * 1975-01-16 1976-07-22 Metallgesellschaft Ag Verfahren zur herstellung von faeden aus polyamid oder polypropylen
US4011640A (en) * 1975-10-20 1977-03-15 Milliken Research Corporation Yarn entanglement nozzle
US4164841A (en) * 1977-10-03 1979-08-21 Phillips Petroleum Company Method and apparatus for continuous formation of bulked and entangled multifilament yarn
US4193961A (en) * 1978-04-04 1980-03-18 Kling-Tecs, Inc. Method of extruding polypropylene yarn
US4218869A (en) * 1978-08-17 1980-08-26 Phillips Petroleum Company Spun-like continuous multifilament yarn

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EP0028844A2 (de) 1981-05-20
DE3071928D1 (en) 1987-04-23
ES8200150A1 (es) 1981-10-16
ES496819A0 (es) 1981-10-16
EP0028844A3 (en) 1981-12-16
JPS5685417A (en) 1981-07-11
JPS6361408B2 (de) 1988-11-29
CA1162711A (en) 1984-02-28

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