US3120692A - Process for the manufacture of uniformly crimped filter tow - Google Patents

Process for the manufacture of uniformly crimped filter tow Download PDF

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Publication number
US3120692A
US3120692A US36881A US3688160A US3120692A US 3120692 A US3120692 A US 3120692A US 36881 A US36881 A US 36881A US 3688160 A US3688160 A US 3688160A US 3120692 A US3120692 A US 3120692A
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United States
Prior art keywords
tow
filaments
uniform
spinning
crimp
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Expired - Lifetime
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US36881A
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English (en)
Inventor
Robert T Crawford
Joel B Stevens
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Eastman Kodak Co
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Eastman Kodak Co
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Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US36881A priority Critical patent/US3120692A/en
Priority to FR865012A priority patent/FR1293336A/fr
Priority to ES0268308A priority patent/ES268308A1/es
Priority to GB22078/61A priority patent/GB974512A/en
Priority to ES270530A priority patent/ES270530A1/es
Priority to US275324A priority patent/US3220083A/en
Application granted granted Critical
Publication of US3120692A publication Critical patent/US3120692A/en
Priority to BR158629/64A priority patent/BR6458629D0/pt
Priority to GB15947/64A priority patent/GB1068954A/en
Priority to BE646916A priority patent/BE646916A/xx
Priority to FR971832A priority patent/FR1397552A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a

Definitions

  • This invention relates to the manufacture of a special tow of cellulose ester continuous filaments. More particularly, this invention concerns the manufacture of a tow particularly adapted for use in the production of tobacco smoke filters.
  • This invention has for one object an improved method for manufacturing cellulose ester tow particularly adaptable for use in the production of tobacco smoke filters. Another object is to provide a cellulose acetate tow that is especially uniform both lengthwise and across the tow. Still another object is to provide a tow of the class described from which tobacco smoke filters may be prepared free of soft spots and fuzzy ends. Another object is to provide a tow that is treated with certain fila- Inent treating agents which, while lubricating the tow, still permit some static charge to build up on the filaments. Other objects will appear hereinafter.
  • Crimped tows of textile fibers have been known in the textile industry for a number of years. However, such textile tow is unsatisfactory as such for tobacco smoke filters as filters made therefrom have soft spots and otherwise present disadvantages.
  • a tow comprised of cellulose acetate filaments having an acetyl content of 3841%, said filaments being of about 3 to 16 denier per filament.
  • the total denier of the aforesaid tow is within a range corresponding to about 80,000 to 160,- 000. This tow has a crimp of about 415 crimps per inch.
  • the crimp of the usual textile tow may vary in several ways without seriously affecting the textile end product which is usually a spun thread of short fibers.
  • variations in crimp are common.
  • crimp as the number of peak or valley points in a 1-inch length of straight filaments.
  • an 8-crimp tow would measure -inch along each straight portion or /s-inch for a complete crimp cycle.
  • the tow for use in manufacturing tobacco smoke filters represents a specialized product.
  • the present invention which pglovides such a product represents a highly desirable res t.
  • a spinning composition of cellulose acetate having a 384l% acetyl content in acetone or other suitable solvent is made up. If round or cloverleaf shaped filaments are desired, the spinning solution is spun in accordance with the methods described in H. G. Stone U. S. Patents Nos. 2,000,047 and 2,000,048, of May 7, 1935. If on the other hand filaments of a special cross section such as a Y cross section are desired, the solution may be spun in accordance with the method de scribed in Raynolds et a1.
  • U. S. patent application Serial No. 400,564 now U. S. Patent No. 2,829.027).
  • the filaments of whatever configuration, produced as aforesaid, after removal of solvent and setting up in a spinning cabinet are conducted out of the cabinet around a godet roll.
  • the filaments Prior to or beyond the godet roll the filaments are treated with one or more of the finishing agents of the present invention which imparts a low ratio of static to kinetic friction between the tow and the surfaces of the crimper stuffing box.
  • This relationship commonly called slip-stick, has an effect on crimp uniformity.
  • slip-stick ratio With a high slip-stick ratio, the tow column in the stuffing box moves intermittently. With a low slip-stick ratio the column of tow moves more uniformly. This more uniform movement of the tow column is easily seen as is the improved uniformity of crimp.
  • finishing agents are pharmaceutical or edible grades of the followin chemicals:
  • Esters of monohydric alcohols and fatty acids such as isobutyl palmitate and butyl oleate.
  • Naturally occurring or synthetic esters of polyhydric alcohols or their hydrides with fatty acids such as glycerol monosterate, glycerol trioleate, peanut oil, coconut oil and glycerol monooleate-diacetate.
  • High molecular weight monohydric alcohols such as lauryl alcohol, oleyl alcohol and ethylene oxide condensates comprising monohydric alcohols of 300 to 15,000 molecular .wieght.
  • Dior polyhydric alcohols such as glycerine and 2- cthylhexanediol.
  • Ethylene oxide-polyhydric alcohol (or anhydride) ester condensates such as polyoxyethylene glycerol monooleate.
  • the above agents lubricate the tow filaments satisfactorily and while imparting some antistatic etfect, do permit a reasonable static charge to develop on the tow during the tow processing in filter manufacturing.
  • static charge aids in blooming and separating the filaments during filter manufacturing operations as described in our parent application above-identified.
  • the aforementioned agents are nontoxic, free from organoleptic effects and either do not impair the tobacco smoke taste and odor or in some instances may enhance the flavor of the tobacco smoke.
  • the yarn may be prepared and the aforementioned finishes may be applied to the tow by several methods such as the following:
  • (A) Cellulose acetate is produced by a suitable dry spinning process. Immediately after the yarn from one spinning cabinet is withdrawn therefrom and before it wraps the godet roll, it is passed across the surface of a rotating cylindrical applicator roll. The finish is picked up on the roll by partial immersion in a trough containing the finish. If desired a doctor blade can be used on the applicator roll to control the film thtickness of the finish although generally the film thickness is sufficiently uniform to make this unnecessary.
  • the thread of filaments is slightly deflected from a straight line by the roll, preferably no more than 3.
  • the amount of finish applied can be controlled by varying this are of contact or preferably by varying the speed of the roll.
  • the roll may be rotated so that the surface in contact with the thread moves in the same direction as the thread or in the reverse direction. In either case the surface speed of the roll is much less than the linear speed of the thread.
  • the roll speed is generally between 0.1 and 3.0% of the yarn speed. This depends on viscosity and also on the presence of water or other volatile diluent.
  • the roll is generally a. ceramic although metals and other suitable materials may be used.
  • the surface is roughened to insure the adherence of a uniform film of finish. ilf desired, the thread may be guided to run in a suitable groove cut in the roll, providing better opportunity for all the filaments in the thread to pick up finish.
  • lubricant applicators can be used. These may be between the spinning cabinet and the godet roll as described or one or more may be beyond the godet roll but ahead of the crimper.
  • the number of filaments and the size tow are such that it is not practical to produce the tow from a single large spinnerette and the preferred practice is to combine the threads from a number of spinning cabinets.
  • 1,000 to 5,000 denier is an advantagous size to produce from a single cabinet so 15 to cabinets are combined to form a composite tow of 50,000 to 100,000 denier.
  • the spinning capacity of the cabinet and the arrangement of the cabinets will together determine the number which can readily be combined to form the desired tow. Since the linear speed of all cabinet threads should be the same, the godet rolls are driven from a common power source.
  • each spinerette is supplied spinning solution from its own metering pump and these are also driven from a common power unit.
  • the godet rolls and metering pumps may both be driven from a common power unit.
  • the godet rolls and metering pumps may both be driven by the same motor or separate power units may be used in which case they should be interconnected, electrically, hydraulically or mechanically.
  • the threads from the required number of cabinets are drawn together to form the tow which is fed to a stuffing-box type crimper. If desired, additional finish can be applied to the filaments between the godet roll and crimper as discussed above.
  • the finish required on the filaments for good processing into cigarette filters should possess low antistatic properties as disclosed in our earlier U. S. Patent 2,900,983.
  • static is detrimental. Therefore, it is advantageous to apply a temporary antistatic and softening agent prior to crimping. Water is satisfactory for this purpose.
  • the tow be presented to the crimper as a flat band of uniform width and thickness. Variations cannot be tolerated and it is equally important that the band width as the tow enters the crimper be properly correlated to the width of the rolls. Too narrow a band causes low crimp on the edges. Too wide a band results in what is termed crimper harsh. This occurs when a few filaments are trapped between the sides of the rolls and the side plates which form the stutfing box. The filaments are chewed up and pressed into small, flat flakes of the material from which the filaments were spun.
  • FIGURE 1 is a front elevation view showing the tow band in cross section.
  • FIG- URE 2 is a partial side elevation view taken generally on line A-A of FIGURE 1.
  • FIGURE 3 is a sectional plan view taken on line B-B of FIGURE 2 but with the tow omitted.
  • FIGURE 4 is a partial isometric of a critical portion of the stuffer box. The important elements are indicated by numerals with a given numeral indicating the same element in all figures.
  • Items 1 and 2 represent the coacting rolls of a stufling box crimper. These are supported on suitable shafts and bearings and both are positively driven in the direction indicated in FIGURE 2.
  • One roll, as the roll designated 1, is supported with its axis rigidly fixed.
  • the other roll 2 is supported so that its axis may move generally toward or away from roll 1 to accommodate different amounts of material fed through the nip of the rolls.
  • Roll 2 is urged toward roll 1 by a weight, spring or fluid pressure so that the tow is gripped in the nip of the two rolls and forced into the stutfing box 9.
  • the stutfing box is formed by a front plate 5a, a back plate 512, a bottom doctor blade 4a and a top doctor blade 4b.
  • the front and back plates 5a and 5b are spaced apart somewhat more than the thickness of rolls 1 and 2. This spacing is accomplished by clamping the bottom doctor blade 4a securely between the front and back plates.
  • These three members are bolted securely to the frame of the machine to maintain the indicated relationship with roll 1.
  • the top doctor blade 4b is a slip fit between the front and back plates. It is secured to neither but is supported by the movable portion of the frame which carries roll 2.
  • portions of the top and bottom surfaces of the stuffer chamber are formed by the faces of rolls l. and 2.
  • plates 3a and 3b are supported adjacent to the sides of the rolls. These plates are lightly urged against the sides of the rolls. Plates 3a and 3b are best supported in the desired positions by extended portions of front and back plates 5a and 5b.
  • the plates are made of a hard, ceramic material.
  • a liquid lubricating and cooling medium may be applied to the sides of the rolls to reduce friction and wear. Water applied as a spray is preferred but other liquids or gaseous mediums may be employed.
  • FIGURE 4 it will be seen that the leading edge of the bottom doctor blade 4a butts against the end 16 of plates 3b. Edge 15 is also nearly in contact with the cylindrical face 18 of roll 1.
  • the arcuate surface 11 of bottom doctor blade 4a is formed on a curve such that the clearance between said surface and the roll increases.
  • the end 16 of plate 3b also bears against the end of back plate 5b.
  • Item 13 depicts the increase in width of the stuffer box at the butting ends of 3b and 5b.
  • Surfaces 11 and 17 of bottom doctor blade 4a do not extend to form a knife edge at 15. Instead a rounded bevel is formed where surface 17 meets the cylindrical surface 18. This is indicated at 12.
  • the beveled edge provides additional strength to doctor the crimped tow away from the roll and it prevents the tow from being cut as would be the case with a knife edge.
  • Plates 3a and 5a are similarly positioned.
  • Doctor blade 4b occupies a similar position with respect to roll 2v except that 412 can move between 5a and 5b.
  • the movement of roll 2 is preferably in a direction parallel to the line joining the centers of rolls 1 and 2. If such is not the case, the ends of the tip of doctor blade 4b will move into or away from plates 3:: and 3b. A small amount of lateral movement is permissible especially if the end surface 16 of plate 317 (and 3a) is formed to accommodate this movement.
  • one ceramic plate (as 3a) can be made easily removable.
  • the corresponding side plate (541) of the stuffer chamber can be formed in two parts, leaving a continuous narrow slot parallel to the common tangent between rolls 1 and 2. This facilitates threading tow into the crimper and is not detrimental to the quality of the product.
  • a movable gate pivotally mounted to restrict the discharge of the crimp chamber.
  • This gate may be placed in back plate 512 or in either doctor blade 4a or 4b.
  • the gate is urged inwardly by a pneumatic bellows or alternatively by a spring or by a weight operating through levers.
  • the design and operation of such gates are well known to those skilled in the art.
  • Feeding the tow to the nip of rolls 1 and 2. is a critical feature of the invention and will be discussed in detail.
  • the strands forming the tow must be arranged to form a flat ribbon of uniform width and thickness as indicated at 7. Formation of such a ribbon is facilitated by directing the strands of the tow across a guide 6. Although only one such guide is shown, it is frequently desirable to use a series of guides, breaking the tow slightly under or does not result in uniform band thickness.
  • one or more pairs of guides 10a and ltlb may be placed perpendicular to the edges of the ribbon to define its width.
  • the width of the ribbon as it enters the nip of the rolls should be slightly less than the width of the rolls. If desired, a raised surface may be added to plates 3:: and 3b to define this reduced width.
  • the width of the tow band should not be unduly reduced by guides close to the rolls as such procedure
  • the pair of edge guides closest to the nip of the rolls serve to prevent occasional increases in band width rather than to continuously decrease the width.
  • control of this dimension is essential for the production of a tow with a uniform crimp across the width of the tow.
  • crimped tow for staple it is permissible and frequently the practice not to fill the crimper.”
  • relatively large spaces are left between the edges of the band and the sides of the crimper. This permits relatively large tolerances and clearances in the design and assembly of the crimper but results in a tow which has a low crimp on the edges.
  • the width of the entering tow band is not desirable to have the width of the entering tow band as wide as the rolls as in such case a few filaments might be trapped between the sides of the rolls and plate 3a or 3b. This breaks the filaments or grinds them up to form small, flat flakes of material.
  • the two rolls be of equal thickness and that corresponding sides form a single plane.
  • the working faces of plates 3a, 3b and 5a and 5b are in or parallel to these planes.
  • the edges of the entering tow band be parallel to these planes.
  • Example I In accordance with this example a round or conventional type of filament was produced. That is, a spinning solution of about 28% of cellulose acetate, 0.4% of titanium dioxide, 2% of water, balance acetone solvent was made up in a conventional manner. This solution was spun in accordance with usual dry spinning methods through spinnerettes having 250 holes of a 0.07 mm. diameter per spinnerette. The filaments were withdrawn from the spinning cabinet around a godet roll at approximately 10 feet per second.
  • the withdrawn filaments were then treated with one of the special filament finishes described above, namely, peanut oil. This finish was applied by applicator roll in an amount of 0.5% of the weight of the filament.
  • a suitable number of filaments thus finished to give a tow of a denier of 75,000 was uniformly crimped to 8.0 crimps per inch with a stufi'lng box crimper having rolls one inch wide and seven inches in diameter as described above.
  • Hardness was measured by observing the deformation of the rod when subjected to a suddenly applied load, crushing the rod transversely between a stationary base plate and an anvil.
  • Pressure drop was measured by determining the differential pressure necessary to pass 17.5 ml. of air per second through the filter.
  • the weight of individual rods was measured.
  • Example II the spinning solution used was of a somewhat different composition than that used in Example I and comprised the following: cellulose ester27.00%, titanium dioxide-0.15%, water-1.55%, acetone-71.30%. Reasonable tolerances were permitted on the percentage of each component.
  • This solution was extruded through a spinnerette containing 0.04 mm. openings to obtain a yarn made up of 600 filaments.
  • This yarn was treated with a special finishin g agent composed of lauryl alcoholparts, glycerine- 5 parts, water90 parts. This solution was applied so that the yarn contained 0.5 of the alcohol-glycerine mixture.
  • the yarn thus treated was formed into a tow of 90,000 denier, uniformly crimped as in the preceding examples and formed into filters.
  • the improvement by the use of this special treating agent was evidenced by the following:
  • the water content of the tow softened the filaments so that the crimping required less stufiing box pressure and the filaments were not weakened appreciably at the points of bending. Subsequently, the tow had more resilience and retained a higher amplitude of crimp after stretching and relaxing.
  • the filters thus formed were tested and the filters were found to be firmer than when made from a comparable tow lubricated with mineral oil due to the improved crimp retention of the filaments.
  • finishing agent in the amount of 0.5 the finishes of the present invention may be applied in amounts ranging from 0.1% to 3.0%.
  • any crimp variation within the range of about a plus or minus one crimp from the nominal and in our preferred operations our product is within closer limits.
  • the process of manufacturing tow particularly adapted for use in the preparation of tobacco smoke filters which comprises spinning filaments in 15 to spinning cabinets from a spinning solution supplied from metering pumps driven by a common power unit, withdrawing the spun filaments from all of said cabinets and conducting the filaments around godet rolls driven from a common power source whereby better uniformity of spinning and withdrawal are obtained, treating all of said filaments with a non-toxic finishing agent which imparts a low slipstick ratio to the filaments, gathering all of the filaments together in the form of a band of filaments of substantially uniform width and thickness, applying a temporary antistatic and softening liquid to said uniform band, feeding the uniform band to and through a stuifing box crimper whereby at least four crimps per inch is imparted to said filaments, said crimped tow resulting from the aforesaid process being characterized in that it is free of skips and is uniform across the tow and withdrawing and packing said crimped tow.
  • a process of manufacturing crimped tow for use in the preparation of tobacco smoke filters which tow is characterized in that the crimp is uniform and free of skips, any variation in crimp being less than two crimps from the nominal, which comprises spinning the filaments to be formed into the tow, treating said filaments with a finishing agent which lubricates without eliminating all of the static on the filaments, also applying a temporary softening liquid to the filaments which temporarily reduces the static, feeding a band of said filaments to a stuffing box type crimper which has rolls at the entrance thereof, maintaining said band of a width slightly less than the width of said rolls, processing the filaments in said crimper to apply a uniform crimp to said filaments and withdrawing said uniformly crimped tow filaments from the apparatus.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Filtering Materials (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)
US36881A 1960-06-17 1960-06-17 Process for the manufacture of uniformly crimped filter tow Expired - Lifetime US3120692A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US36881A US3120692A (en) 1960-06-17 1960-06-17 Process for the manufacture of uniformly crimped filter tow
FR865012A FR1293336A (fr) 1960-06-17 1961-06-15 Procédé et appareil pour la production d'un cordon textile crêpelé utilisable pour la fabrication de filtres de cigarettes
ES0268308A ES268308A1 (es) 1960-06-17 1961-06-16 Un procedimiento de fabricar mecha para su uso en filtros para el humo del tabaco
GB22078/61A GB974512A (en) 1960-06-17 1961-06-19 An improved process and apparatus for the manufacture of uniformly crimped filamentary tow
ES270530A ES270530A1 (es) 1960-06-17 1961-09-16 Un dispositivo rizador para preparar mecha rizada
US275324A US3220083A (en) 1960-06-17 1963-04-24 Apparatus for the manufacture of uniformly crimped filter tow
BR158629/64A BR6458629D0 (pt) 1960-06-17 1964-04-03 Aparelho para fabricacao de filaca de filtragem uniformemente franzida
GB15947/64A GB1068954A (en) 1960-06-17 1964-04-17 Tow crimping apparatus
BE646916A BE646916A (es) 1960-06-17 1964-04-22
FR971832A FR1397552A (fr) 1960-06-17 1964-04-22 Appareil pour crêpeler uniformément un cordon de filaments

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US36881A US3120692A (en) 1960-06-17 1960-06-17 Process for the manufacture of uniformly crimped filter tow

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US3120692A true US3120692A (en) 1964-02-11

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ES (2) ES268308A1 (es)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237270A (en) * 1963-12-11 1966-03-01 Du Pont Stuffer box crimper with composite crimper discs
US3238591A (en) * 1963-09-17 1966-03-08 Spunize Company Of America Inc Yarn twist control apparatus and method
US3292230A (en) * 1964-01-22 1966-12-20 Elitex Zavody Textilniho Stuffing box crimper
US3452410A (en) * 1965-06-04 1969-07-01 Courtaulds Ltd Process of opening and crimping tow
US3805346A (en) * 1971-08-23 1974-04-23 Concorde Fibers Method for treating yarn
US3946469A (en) * 1967-11-20 1976-03-30 Imperial Chemical Industries Limited Polyester fibers and tows
US6351877B1 (en) 2000-05-31 2002-03-05 Eastman Chemical Company Synthetic fiber crimper, method of crimping and crimped fiber produced therefrom
US20050283958A1 (en) * 2004-06-25 2005-12-29 Celanese Acetate Llc Cellulose acetate tow and method of making same
US20050288163A1 (en) * 2004-06-25 2005-12-29 Celanese Acetate Llc Cellulose acetate tow and method of making same
US20050283959A1 (en) * 2004-06-25 2005-12-29 Caenen Philip I L Cellulose acetate tow and method of making same
US20050285298A1 (en) * 2004-06-25 2005-12-29 Ellison Gary B Cellulose acetate tow and method of making same
US20050285299A1 (en) * 2004-06-25 2005-12-29 Celanese Acetate Llc Cellulose acetate tow and method of making same
US20050283960A1 (en) * 2004-06-25 2005-12-29 Ellison Gary B Cellulose acetate tow and method of making same
US7152288B1 (en) * 2005-07-07 2006-12-26 Celanese Acetate Llc Stuffer box crimper and a method for crimping
US8790556B2 (en) * 2012-07-25 2014-07-29 Celanese Acetate Llc Process of making tri-arc filaments
US9919501B2 (en) 2012-12-29 2018-03-20 Unicharm Corporation Manufacturing method and manufacturing system for cleaning member
US10098516B2 (en) * 2012-12-29 2018-10-16 Unicharm Corporation Method for producing cleaning member, and system for producing cleaning member
US10638908B2 (en) 2012-12-29 2020-05-05 Unicharm Corporation Method and system for manufacturing cleaning member
EP3662770B1 (en) 2018-10-25 2021-02-24 Daicel Corporation Electronic cigarette tip tow band, electronic cigarette tip, method for producing electronic cigarette tip tow band, and method for producing electronic cigarette tip

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113844103B (zh) * 2021-10-26 2024-08-23 武汉淡雅香生物科技有限公司 一种接装纸用万向调节预卷曲装置

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Publication number Priority date Publication date Assignee Title
US2502129A (en) * 1942-04-10 1950-03-28 American Viscose Corp Method of treating filamentary materials
US2733122A (en) * 1951-11-30 1956-01-31 vixvi o
US2734228A (en) * 1952-10-28 1956-02-14 Crimping apparatus
US2747233A (en) * 1952-07-25 1956-05-29 Du Pont Adjustable stop crimper
US2933771A (en) * 1955-10-10 1960-04-26 Allied Chem Crimping apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2502129A (en) * 1942-04-10 1950-03-28 American Viscose Corp Method of treating filamentary materials
US2733122A (en) * 1951-11-30 1956-01-31 vixvi o
US2747233A (en) * 1952-07-25 1956-05-29 Du Pont Adjustable stop crimper
US2734228A (en) * 1952-10-28 1956-02-14 Crimping apparatus
US2933771A (en) * 1955-10-10 1960-04-26 Allied Chem Crimping apparatus

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238591A (en) * 1963-09-17 1966-03-08 Spunize Company Of America Inc Yarn twist control apparatus and method
US3237270A (en) * 1963-12-11 1966-03-01 Du Pont Stuffer box crimper with composite crimper discs
US3292230A (en) * 1964-01-22 1966-12-20 Elitex Zavody Textilniho Stuffing box crimper
US3452410A (en) * 1965-06-04 1969-07-01 Courtaulds Ltd Process of opening and crimping tow
US3946469A (en) * 1967-11-20 1976-03-30 Imperial Chemical Industries Limited Polyester fibers and tows
US3805346A (en) * 1971-08-23 1974-04-23 Concorde Fibers Method for treating yarn
US6351877B1 (en) 2000-05-31 2002-03-05 Eastman Chemical Company Synthetic fiber crimper, method of crimping and crimped fiber produced therefrom
US7534380B2 (en) * 2004-06-25 2009-05-19 Celanese Acetate Llc Cellulose acetate tow and method of making same
EP1789615A4 (en) * 2004-06-25 2009-12-02 Celanese Acetate Llc CELLULOSE ACETATE CABLE AND MANUFACTURING METHOD THEREFOR
US20050283959A1 (en) * 2004-06-25 2005-12-29 Caenen Philip I L Cellulose acetate tow and method of making same
US20050285298A1 (en) * 2004-06-25 2005-12-29 Ellison Gary B Cellulose acetate tow and method of making same
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