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US2794239A - Tow for use in the production of tobacco smoke filters - Google Patents

Tow for use in the production of tobacco smoke filters Download PDF

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Publication number
US2794239A
US2794239A US324342A US32434252A US2794239A US 2794239 A US2794239 A US 2794239A US 324342 A US324342 A US 324342A US 32434252 A US32434252 A US 32434252A US 2794239 A US2794239 A US 2794239A
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US
United States
Prior art keywords
tow
fibers
strand
fiber
filaments
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.)
Expired - Lifetime
Application number
US324342A
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English (en)
Inventor
Robert T Crawford
Joel B Stevens
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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Filing date
Publication date
Priority to IT599386D priority Critical patent/IT599386A/it
Priority to CA639825A priority patent/CA639825A/en
Priority to CA639824A priority patent/CA639824A/en
Priority to US324342A priority patent/US2794239A/en
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to ES0212532A priority patent/ES212532A1/es
Priority to US435544A priority patent/US2900988A/en
Publication of US2794239A publication Critical patent/US2794239A/en
Application granted granted Critical
Priority to US699164A priority patent/US2953838A/en
Priority to US757694A priority patent/US2953837A/en
Priority to GB37482/58A priority patent/GB909940A/en
Priority to DE19581407402D priority patent/DE1407402B/de
Priority to FR780268A priority patent/FR1217725A/fr
Priority to MY1964115A priority patent/MY6400115A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/224—Esters of carboxylic acids; Esters of carbonic acid
    • 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
    • A24D3/0212—Applying additives to filter materials
    • A24D3/022—Applying additives to filter materials with liquid additives, e.g. application of plasticisers
    • 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
    • A24D3/0229—Filter rod forming processes
    • A24D3/0237—Filter rod forming processes by extrusion
    • 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
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/14—Use of materials for tobacco smoke filters of organic materials as additive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/18—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/144—Alcohols; Metal alcoholates
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M7/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made of other substances with subsequent freeing of the treated goods from the treating medium, e.g. swelling, e.g. polyolefins
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/40—Reduced friction resistance, lubricant properties; Sizing compositions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2922—Nonlinear [e.g., crimped, coiled, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2964—Artificial fiber or filament
    • Y10T428/2965—Cellulosic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2964—Artificial fiber or filament
    • Y10T428/2967—Synthetic resin or polymer
    • Y10T428/2969—Polyamide, polyimide or polyester
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/298—Physical dimension

Definitions

  • the invention is concerned with a method for the preparation of structurally unitary elongated rod-like masses of cellulose acetate fibers contained within an outer surrounding wrapper of paper and suitable in appropriate lengths for use as cigarette filter tips and as filter elements for pipes and for cigar and cigarette holders.
  • the present application relates to a modified procedure for making filters of a type similar to those disclosed in copending patent :application of Cobb and Hargrave, Serial No. 324,284 filed December 5, 1952.
  • cellulose acetate e. g., cellulose triacetate, cellulose acetate butyrate, and cellulose acetate propiw mate as well as ordinary yarn-type cellulose acetate having an acetyl value in the range 38-41%, to purposes of tobacco smoke filtering have been known for some time.
  • the Cobb and Hargrave application teaches that superior filter elements of improved filtering ability and designed for employment in the mass production methods and machinery of the cigarette industry may be severed in suitable lengths from a continuous running length of rod comprising a shaped and formed bundle of cellulose acetate fibers primarily longitudinally oriented and surrounded by a continuous peripheral retaining shell.
  • the fiber bundles are made from continuous fiber masses, e. g., tows of continuous filaments or slivers of carded cut staple fibers.
  • a filter .element must be rejected if it contains passages which lead to channeling of the smoke
  • the present invention fibers will not accidentally Patented June 4, 1957 since in such case inadequate filtering will resul,
  • compaction of the fibers transversely is increased to avoid the possibility of channels, either the drawing properties of the cigarette are so affected that the filter element again is considered not serviceable or the density, weight or body become intolerable to the manufacturing procedures.
  • a further object of the invention is to provide a method for the preparation of elements of the described character.
  • a still further object is the preparation of structurally unitary fibrous filters in which substantially each and every fiber is positively bound to the structural unit and from which, therefore, the removal of occur when the filter element is in use.
  • the expression randomly oriented primarily in a longitudinal direction is intended to describe the condition of the fibers within the filters of the present invention in which the fibers are as a whole longitudinally aligned and are in the aggregate in a parallel orientation, but in which distinct short portions of individual fibers may run more or less at random in nonparallel diverging and converging directions.
  • strand as employed in the present specification and claims is intended to mean an elongate continuous relatively loose and uncompacted mass of fibers substantially oriented in a longitudinal direction and the term is generic to both continuous filament tows and continuous slivers of carded staple fiber.
  • continuous filament tow we mean the material which results when filaments spun from a plurality of spinnerets holes are brought together and combined, preferably with filaments from other spinnerets to form a tow of parallel filaments.
  • carded sliver we refer to the untwisted continuous strand or rope comprised of cut fibers which results from the passage of said fibers through a conventional carding machine e. g. a cotton, woolen or worsted card.
  • a conventional carding machine e. g. a cotton, woolen or worsted card.
  • the strand In the ber of conditioning treatments during which the strand is opened and dechannelized. During the strand treating period the strand more or less loses its identity as such in that it is converted into a quite open and loose form with the filaments in indeterminate relationship, subsequently assuming web-like and ribbon conformations. Therefore the fiber mass is more aptly identified during the treating period as a fiber bundle rather than a strand.
  • the treated dechannelized strand or fiber bundle finally is run through a tapered condensing tube and becomes thereby reformed and condensed as a compacted dechannelized strand.
  • the structurally unitary product resulting from shaping and heat treatment of the condensed strand will be referred to as a rod.
  • the strand In a method generally similarto that disclosed in the aforementioned application, but differing in a specific and critical procedure for pretreatment of the strand, we form the strand into a structurally unitary rod-like condition only after the special novel pretreatment thereof.
  • the treated and formed strand is shaped to the transverse section of a cigarette body and paper is subsequently closed around the compacted strand and sealed in place as an outer retaining skin, the paper-covered fiber rod thus produced subsequently being cut to appropriate lengths.
  • the special objects of the present invention are accomplished particularly by the intervening treatment of the strand.
  • the invention is designed primarily for use with a strand consisting of a continuous filament tow of cellulose acetate fibers.
  • the strand is brought to an open relaxed form whereby the extent of fiber orientation is reduced and in its opened, relaxed form the strand is subjected to a treatment with a fluid chemical which subsequently results in bonding of the fibers at random points of contact.
  • a lofting or second opening operation follows the chemical treatment. We have found that such procedure results in uniform cross-sectional distribution of fibers and in a fiber bonding which insures that fibers will be positively retained in place within the body of the filter elements.
  • a preferred embodiment of the invention resides in a method comprising carrying out the above-listed sequential steps upon a crimped continuous filament tow from which the slack has been removed and subsequently condensing and forming the moving treated strand into desired size and shape by means of a condensing tube, laying the condensed strand into a moving ribbon of paper which then is closed about the periphery of the condensed strand and serves as a retaining shell for the latter, and finally heat treating the paper covered compacted strand and thereby forming a structurally unitary rod-like article.
  • Figure 1 is a schematic diagram of the various phases of treatment required to convert the initial strand into final rod-like filter elements in accordance with a preferred method
  • Figure 2 is a vertical longitudinal section through the tip end of a portion of a cigarette provided with a filter element of the invention
  • Figure 3 is an enlarged view of a portion of crimped tow shown in Figure 1;
  • Figure 4 is an illustration of tow of the type shown in Figure 3 packaged in a conventional ball Warp.
  • a strand, most advantageously a previously preferably mechanically crimped tow, 1 is passed through a series of tension fingers 2 to remove slack.
  • the tow from which the slack has been removed is passed to a variable drafting arrangement comprising a pair of positively driven rolls 3 and a pair of rolls 4 which either are positively driven at a slower rate than the rolls 3 or are held from free turning by a braking or friction action so that they are resistingly turned by the action of rolls 3 in positively pulling through the tow 1.
  • the strand is subjected to suflicient tension to produce a restriction of the strand which results, upon emergence of the strand from the nip of the positively driven rolls into a zone of relaxation, in a more random distribution of the filaments.
  • the restriction is a result of inherent elastic forces within the filaments of the strand.
  • the strand which as a result of the drafting and relaxation has become somewhat webbed, next is sent through an opening device 5 provided with a plurality of air jets which move the filaments apart and produce a ribbon-like fiber mass or bundle from which smaller individual bundles are eliminated and which has a stillmore web-like nature.
  • the bundle passes then to chemical treating apparatus 6 which preferably is composed of a multiplicity of atomizing sprays directed at the ribbon-like bundle from all points around the latter.
  • chemical treating apparatus 6 which preferably is composed of a multiplicity of atomizing sprays directed at the ribbon-like bundle from all points around the latter.
  • a plasticizer or the like which serves to partially dissolve or soften the fiber which it reaches and which will produce in the fibers a sticky attitude sufiicient to subsequently produce fiber bonding is injected into and throughout the fiber bundle.
  • the moistened fiber moves next to a lofting device 7 which serves further to fluff up and improve the loftiness of the fiber mass.
  • the lofted moving bundle is led onto an apron or scray plate 8 where it collects and dwells for a short period of time in a relaxed condition.
  • the bundle is withdrawn from the scray plate and passed into a suitable funnel-like horn 9 which serves as a condenser.
  • a suitable funnel-like horn 9 which serves as a condenser.
  • the strand is reformed as a condensed dechannelized mass, i. e. the bundle is shaped into a partially compacted mass of approximately desired transverse section which normally will be circular.
  • shredded tobacco is metered from a hopper onto a moving paper ribbon carried by a flax tape.
  • the tobacco and the paper then go through several dies thus forming the tobacco into a cylinder and lapping the paper over itself.
  • the glue on the paper is heat sealed forming a continuous cigarette.
  • a cutter knife cuts the tube into desired lengths.
  • the partially compressed dechannelized strand of a continuous nature is substituted for the stream of tobacco fed onto the paper in the remainder of the process of the present invention to form the cigarette filter which we propose as new and novel.
  • the compacted dechannelized strand from the condenser is passed onto a moving ribbon 10 of cigarette paper fed from a supply roll 11 and carried by an endless conveyor belt 12. From this point the condensed reformed strand and the paper with which it is associated the accompanying drawpaste along the edge of t e paper, next to a final forming die 15 which completes positioning of the paper.
  • the paper enclosed strand may be subjected to a treatment with a heated die 17 which insures satisfactory fusion and welding of the fibers at random points of contact and thereby results in rod formation.
  • the rod thence is passed to a cutting device 18 which is adjusted to sever the paper covered rod into filter elements of desired length.
  • An alternate method is to cut the rod before complete bonding action occurs and complete the process by storing the severed elements in an oven.
  • the process of the invention employs as a starting material a crimped lubricated strand of synthetic filaments or fibers.
  • the lubricant may be any one of a number of neutral, nontoxic materials. It has been found advantageous to employ on the fiber approximately 0.5% by weight of pharmaceutical grade mineral oil.
  • the so-called yarn-type cellulose acetate is a preferred material for use as an acetate having an acetyl value in the range of 38-41%, most advantageously 38.8-39.2%.
  • cellulose acetate is used generically herein to include, not only cellulose acetate having an acetyl value of 38-41%, but also cellulose triacetate, acetate-propionate and acetate-butyrate.
  • plasticized fibers While it is not necessary to use plasticized fibers it is pos-' sible to practice the invention with a strand which constitutes a fiber mixture having some plasticized fibers. If plasticized fibers are to be employed, it will be possible under suitable conditions to use 100% plasticized fiber if a low percentage of plasticizer has been put in the fiber. With a blend of plasticized and unplasticized fibers, plasticized fibers containing 33% of a suitable plasticizer such as triethyl citrate havebeen found best. It is to be remembered, however, that even totally unplasticized acetate fibers will fuse with proper heat control and that in accordance with advantageous procedure of the invention, plasticizer is applied to all the fibers.
  • a suitable plasticizer such as triethyl citrate
  • the fibers employed might perhaps satisfactorily be in the form of a strand comprising 100% yarn-type unplasticized cellulose acetate such spinning of a cellulose acetate acetone dope.
  • the strand is suitably crimped and contains in accordance with the invention 4-15 crimps per inch, most advantageously -15 crimps per inch.
  • a crimped tow proves most advantageous in that it offers continuously uniform properties.
  • the tow employed may be in the form of a ball warp, i. e., a continuous crimped tow as taken from crimping machines and wrapped on a core.
  • the acetate filaments should have a weight within the range of 3 to 16 denier per filament and a total denier of the tow within the range of 80,000 to 160,000 denier.
  • An advantageous starting material is a yarn-type dull cellulose acetate continuous filament tow of 5 denier per filament with 90,000 total denier.
  • a continuous filament tow may be made up with one or more filaments of plasticized yarn which plasticized yarn may have a maximum total denier of 80,000. If a carded sliver is to be employed rather than a continuous filament tow, the sliver may have a weight of 100 to 300 grains per yard.
  • the tensioning step which is accomplished for the purpose of slack removal provides an evened-out strand and requires merely that suflicient tension be applied to the tow to remove the slack in any of the filaments.
  • Such a procedure is well known to those familiar with the textile art and may be accomplished with any suitable arrangement of a series of tensioning bars or spools.
  • the drafting step employing a double set of rolls to produce variable draft serves to enhance the bloom or loftiness of the tow.
  • the elastic forces inherent in the fibers cause reactions in all planes and result in a more opened tow.
  • the actual degree of initial crimp and the following controlled drafting, relaxing, etc. is subject to variation over a wide range depending upon the various deniers per filament, total deniers, lubricant, and such changes as may be developed from time to time.
  • the air opening procedure which might more properly be termed bundle breaking uses high velocity air or other gas and should be provided with variable air pressure.
  • dechannelizing and dechannelized, etc. as employed in the present specification have reference respectively to the procedure of strand opening and the character for the resulting fiber mass as explained in the instant paragraph.
  • a dechannelized fiber strand is one been removed the tendency for smaller groups of adjacent fibers or filaments to become associated as distinct compacted smaller bundles within the larger mass or bundle of filaments. Such a tendency of course inherently includes a tendency toward formation of channels.
  • the multitude of orifices in the air-jet strand opener or dechannelizer produces a high degree of separation and the filament strand is well opened resulting in a large percentage of the fibers being directly exposed to the spray in the subsequent chemical treatment.
  • the bundle breaking operation reduces interior filament marriage resulting from the crimping operations. It is necessary to'remove and break up such grouping in order that there be no small fiber bundles present in the final product.
  • the air jet breaking procedure preferably is accomplished with jets provided by approximately 600 holes of 0.3 mm. diameter and air pressure at 15 to 20 pounds gauge. Obviously these conditions can be varied within relatively wide limits as can the spacing and positioning of the air jets.
  • the chemical treatment of the air opened ribbon-like bundle utilizes a battery of air atomizers to produce intimate spraying among and onto the fibers throughout the bundle body whereupon the fiber mass becomes more or less saturated with the treating liquid.
  • a battery of air atomizers to produce intimate spraying among and onto the fibers throughout the bundle body whereupon the fiber mass becomes more or less saturated with the treating liquid.
  • all or substantially all of the individual fibers are wet at a plurality of points along any given length corresponding to the extent of a single filter element.
  • a plasticizing agent such as methyl phthalyl ethyl glycollate (Monsanto Santicizer M-l7) is employed although varying situations may make it equally feasible to use semi-solvents, oils, etc., which will serve to bond the fibers together and produce subsequent consolidation of the strand.
  • nontoxic plasticizers which have nontoxic decomposition products and do not adversely affect the taste of tobacco smoke filtered through elements of the invention are dibutyl phthalate, tripropionin and acetyl triethyl citrate.
  • the plasticizing agent preferably is sprayed on until the fibers contain 5 to 30% by weight of plasticizer, more preferably 10 to 15%. If
  • the temperature at which the chemical treatment takes place may be controlled.
  • the lofting procedure is necessary to restore the fiber mass into a springy, resilient condition and to prevent group bundling and matting of the Wetted fibers.
  • For lofting one may use an elongated tube into the leading end of which is directed an annular controlled blast of air of varying turbulence under a pressure of to 100 lbs. gauge, preferably 45 to 50 pounds gauge.
  • the annular blast creates an aspirating effect to move the tow and additional air through the annulus and the remaining portion of the tube. All of the entering air, and of course the tow, pass out of the tube at the opposite end.
  • the fiber bundle entering the lofting tube advantageously is in the form of a ribbon-like web
  • the lofting operation increases the filtering efficiency of the fiber rod and adds body to the final filter assembly.
  • the step in which the treated fiber mass is permitted to dwell upon the scray plate permits relaxing and eases the strains produced by the straight-line tension to which the fiber previously has been subjected and prevents extension of the fiber to the point where decrimping or breaking occur from excessive tensile forces.
  • the scray serves as a bin or reservoir.
  • the opened, sprayed and lofted relaxed fiber bundle is passed into the funnellike condensing nozzle and thence into the shaping end thereof wherein the lands consolidate the mass, reforming the dechannelized strand in a compacted condition and shaping it to suitable size and transverse section for laying into the advancing cupped paper ribbon.
  • the transverse section will be circular, but it may be oval, triangular, square, or any special shape as desired.
  • a final circular section of 0.32" diameter is desired in the filter elements. It should be noted in this connection, however, that variation in circumference or diameter ordinarily ismore critical than Variation in weight of elements prepared for use as cigarette filter tips as regards problems encountered in using the tips in standard cigarette manufacturing and packing procedures.
  • the filter material is to be used as a tip for cigarettes, known procedures for manufacturing filter tip cigarettes may be used. That is to say, elements of appropriate length may be fed to a joiner or other machine which serves to position the filter elements adjacent to tobacco bodies, join the two and sever the joined pieces at the proper points.
  • the product produced in accordance with the present invention is an elongated rod, normally cylindrical in form and customarily substantially the size of a cigarette in circumference and diameter, the rod being a strucurally unitary element composed of a dechannelized mass of randomly but primarily longitudinally oriented and transversely uniformly distributed crimped yarntype cellulose acetate fibers severed from a condensed reformed treated strand prepared from a continuous filament tow, or carded sliver, and a cylindrical paper retaining shell surrounding said mass at the periphery thereof, substantially all of the fibers of the mass being positively bonded within said structurally unitary rod.
  • the filter elements comprise paper encased rods of cellulose acetate fibers having the individual fibers thereof tack welded to each other, the rods being pervious to air along their longitudinal axes. That is to say, the bonding is not sufiiciently complete to give anything approaching a solid material with longitudinal passages but is rather a matter of spot bonding each filament at various points so as to give a material which has approximately the same physical characteristics as a plain, wrapped strand, but is yet suificiently unitary to prevent individual filaments being pulled out.
  • Example 1 Filter elements of various materials of approximately length and normal cigarette diameter were compared by passing through them tobacco smoke containing tars, nicotine, etc., distilled off from burning tobacco at normal burning temperatures. Analysis of the products retained by each filter indicated that a cellulose acetate element made in accordance with the invention gave superior results.
  • Example 2 A continuous filament tow of yarn-type unplasticized dull cellulose acetate containing 0.5% mineral oil lubricant and having 12 crimps per inch produced by a crimping machine, 5 denier per filament and 90,000 total denier was passed through a tension device and slack was removed from the tow. The tensioned tow next was passed through two pairs of controlled drafting rolls as illustrated in the drawings and was thence directed to an air jet bundle breaker of a type such as that illustrated in the drawing. Air jets from above and below the tow operating at a pressure of 15 to 20 pounds gauge and having a total of 600, 0.3 mm.
  • the strand was passed onto amoving paper tape with which it subsequently was sized, covered and sealed in a fashion as described above.
  • the product was severed into short lengths as cylindrically shaped rod-like filter elements of desired body, size, draw, resiliency, rigidity, weight, and transverse fiber distribution.
  • the bonding action of the plasticizer was completed.
  • the elements contained no individual fiber bundles and no perceptible channels. The elements did not lose fibers inadvertently.
  • An element prepared as described was formed into a filter-tipped cigarette on a conventional cigarette making machine and the cigarette produced gave a highly satisfactory filtered smoke. It was particularly noticeable that no fibers from the filter were plucked out by the tongue of the smoker in trials under normal conditions.
  • the rod may be described as consisting of randomly but primarily longitudinally oriented fibers.
  • the various expressions employed obviously are intended to define that condition which exists when a tow in which all fibers are substantially longitudinally aligned and therefore mostly parallel are subjected to the various opening and dechannelizing treatments.
  • the rods produced in accordance with the invention are composed of fibers which in the aggregate are parallel and longitudinally aligned but which have short portions divergent from the main fiber axis.
  • a strand which has been treated in accordance with the invention will consist of a fiber mass in which the fibers may be said to lie randomly but primarily in longitudinal orientation.
  • tobacco smoke filtering elements may be produced in accordance with our invention from a wide variety of thermoplastic filamentary material. While a preferred material is cellulose acetate of the so-called yarn type, many other cellulose derivatives may be employed such as cellulose acetates of varying degrees of acetylation, cellulose propionates, cellulose butyrate, cellulose acetate butyrate and other organic acid esters of cellulose. Likewise, filamentary or fibrous material composed of synthetic thermoplastic material such as the various polyamids, polyacrylic and polyester materials typified by materials sold under trade names such as Nylon, Orlon, Acrilan, Dacron, and similar materials may be employed. In fact, any non-inflammable or slow burning synthetic thermoplastic material which is susceptible of surface or partial solvation may be used.
  • solvation as employed in the present specification and claims is meant the formation, by the action of a solvent or plasticizer and/ or heat, of an adhesive condition in surface portions of fibers whereby there is produced a welding and adhesion between adjacent fibers contacting at such portions.
  • An article of manufacture comprising an intermediate product for use in the manufacture of fibrous cigarette filter tip elements of which all fibers are coextensive, said packaged, substantially un' filament tow of which the intermediate product being a twisted, elongate, continuous filaments in the aggregate are substantially parallel, said tow having filaments of an unplasticized but plasticizable, dry-spun, cellulose acetate having an acetyl content of about 38-41%, said filaments being of about 3 to about 16 denier per filament and the total denier of the tow being within a range corresponding to about 80,000 to about 160,000, the individual filaments containing a high degree of crimp, of the order of about 10 to 15 crimps per inch, the tow having a low degree of lubrication pr vided by a small amount, of the order of about 0.5% by weight, of a non-toxic lubricant comprising a pharmaceutical grade mineral oil, the high order of crimp and low order of lubrication providing the tow with good blooming qualities
  • An article of manufacture comprising an intermediate product for use in the manufacture of fibrous cigarette filter tip elements of which the fibers are parallelized and coextensive, said intermediate product being a packaged, substantially untwisted, elongate, crimped, continuous filament tow of which the filaments in the aggregate are substantially parallel, said tow having filaments of an unplasticized but plasticizable, dry-spun, cellulose acetate having an acetyl content of about 38-41%, said filaments being of about 3 to about 16 denier per filament and the total denier of the tow being within a range corresponding to about 80,000 to about 160,000, the tow having at least 4 crirnps per inch and a lowdcgree of lubrication provided by a small amount, of the order of about 0.5 by weight, of a non-toxic lubricant comprising a pharmaceutical grade mineral oil, the crimp and low order of lubrication providing the tow with good blooming qualities.
  • a packaged article of manufacture comprising an intermediate product as defined in claim 2 wherein the tow is made up of about 18,000 filaments of about 5 denier per filament.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Artificial Filaments (AREA)
  • Chemical Treatment Of Fibers During Manufacturing Processes (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US324342A 1952-12-05 1952-12-05 Tow for use in the production of tobacco smoke filters Expired - Lifetime US2794239A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
IT599386D IT599386A (nl) 1952-12-05
CA639825A CA639825A (en) 1952-12-05 Filter tow treated with sorbitan compounds
CA639824A CA639824A (en) 1952-12-05 Filter tow treated with sorbitan compounds
US324342A US2794239A (en) 1952-12-05 1952-12-05 Tow for use in the production of tobacco smoke filters
ES0212532A ES212532A1 (es) 1952-12-05 1953-12-04 UN MÉTODO PARA LA PREPARACIoN DE UNA BOQUILLA FILTRANTE PARA CIGARRILLOS
US435544A US2900988A (en) 1952-12-05 1954-06-09 Tobacco smoke filter elements
US699164A US2953838A (en) 1952-12-05 1957-11-27 Tow for use in the production of tobacco smoke filters
US757694A US2953837A (en) 1952-12-05 1958-08-28 Filter tow made from fine filaments and low total denier
GB37482/58A GB909940A (en) 1952-12-05 1958-11-21 Improvements in or relating to crimped tow
DE19581407402D DE1407402B (de) 1952-12-05 1958-11-21 Fadenstrang für die Herstellung von Tabakrauchfilterelementen
FR780268A FR1217725A (fr) 1952-12-05 1958-11-27 Nouveau produit intermédiaire pour la préparation de filtres pour la fumée de tabac et procédés pour sa fabrication
MY1964115A MY6400115A (en) 1952-12-05 1964-12-31 Improvements in or relating to crimped tow

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US324342A US2794239A (en) 1952-12-05 1952-12-05 Tow for use in the production of tobacco smoke filters
US435544A US2900988A (en) 1952-12-05 1954-06-09 Tobacco smoke filter elements
US69920457A 1957-11-27 1957-11-27
US699164A US2953838A (en) 1952-12-05 1957-11-27 Tow for use in the production of tobacco smoke filters
US757694A US2953837A (en) 1952-12-05 1958-08-28 Filter tow made from fine filaments and low total denier

Publications (1)

Publication Number Publication Date
US2794239A true US2794239A (en) 1957-06-04

Family

ID=32330148

Family Applications (4)

Application Number Title Priority Date Filing Date
US324342A Expired - Lifetime US2794239A (en) 1952-12-05 1952-12-05 Tow for use in the production of tobacco smoke filters
US435544A Expired - Lifetime US2900988A (en) 1952-12-05 1954-06-09 Tobacco smoke filter elements
US699164A Expired - Lifetime US2953838A (en) 1952-12-05 1957-11-27 Tow for use in the production of tobacco smoke filters
US757694A Expired - Lifetime US2953837A (en) 1952-12-05 1958-08-28 Filter tow made from fine filaments and low total denier

Family Applications After (3)

Application Number Title Priority Date Filing Date
US435544A Expired - Lifetime US2900988A (en) 1952-12-05 1954-06-09 Tobacco smoke filter elements
US699164A Expired - Lifetime US2953838A (en) 1952-12-05 1957-11-27 Tow for use in the production of tobacco smoke filters
US757694A Expired - Lifetime US2953837A (en) 1952-12-05 1958-08-28 Filter tow made from fine filaments and low total denier

Country Status (8)

Country Link
US (4) US2794239A (nl)
CA (2) CA639824A (nl)
DE (1) DE1407402B (nl)
ES (1) ES212532A1 (nl)
FR (1) FR1217725A (nl)
GB (1) GB909940A (nl)
IT (1) IT599386A (nl)
MY (1) MY6400115A (nl)

Cited By (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908045A (en) * 1955-10-20 1959-10-13 Eastman Kodak Co Method for removing false twist and longitudinal folds from continuous filament crimped tow
US2909182A (en) * 1954-12-09 1959-10-20 Pluess Staufer North American Tobacco smoke filters
US2953838A (en) * 1952-12-05 1960-09-27 Eastman Kodak Co Tow for use in the production of tobacco smoke filters
US2974101A (en) * 1957-05-22 1961-03-07 Rohm & Haas Ion-exchange assemblies and methods of treating liquids
US3016945A (en) * 1960-04-25 1962-01-16 Eastman Kodak Co Method and apparatus for forming tobacco smoke filters
US3016581A (en) * 1957-11-07 1962-01-16 Eastman Kodak Co Apparatus for opening continuous multifilament crimped tow
US3021242A (en) * 1957-12-16 1962-02-13 Eastman Kodak Co Bonding additives onto filament filters
US3026226A (en) * 1957-12-09 1962-03-20 Eastman Kodak Co Process of manufacturing filters
US3038478A (en) * 1960-05-23 1962-06-12 Eastman Kodak Co Method for producing rigid tobacco smoke filters
US3043736A (en) * 1959-03-02 1962-07-10 Eastman Kodak Co Method for making additive filters
US3050430A (en) * 1959-11-12 1962-08-21 Eastman Kodak Co Jet and method of filter manufacture
US3065519A (en) * 1957-03-07 1962-11-27 English Rose Ltd Method of producing crimped thermoplastic yarns
US3079663A (en) * 1958-05-21 1963-03-05 Eastman Kodak Co Method and apparatus for producing tobacco smoke filters
US3080611A (en) * 1960-11-08 1963-03-12 Eastman Kodak Co Method for the production of cigarette filters
US3093583A (en) * 1958-10-14 1963-06-11 Robert Bosch G M B H Fa Filters and processes for manufacturing the same
US3095632A (en) * 1957-11-07 1963-07-02 Eastman Kodak Co Method for continuously opening crimped tow
US3099594A (en) * 1960-05-05 1963-07-30 Eastman Kodak Co Method for blooming filter tow
US3103220A (en) * 1959-06-12 1963-09-10 Celanese Corp Filter cigarettes
US3126095A (en) * 1964-03-24 Debundlized tow
DE1182571B (de) * 1957-08-10 1964-11-26 Mueller Paul A Vorrichtung zum Herstellen von Tabakwarenfiltern
US3173188A (en) * 1961-11-03 1965-03-16 Eastman Kodak Co Tobacco smoke filter formation
US3177872A (en) * 1962-11-23 1965-04-13 Eastman Kodak Co Vaginal tampon and applicator
US3194002A (en) * 1962-07-25 1965-07-13 Eastman Kodak Co Multifilament yarn of non-regular cross section
US3202155A (en) * 1964-06-05 1965-08-24 Eastman Kodak Co Light weight cigarette filter
US3205107A (en) * 1959-07-02 1965-09-07 Eastman Kodak Co Process for making filament tobacco smoke filters
US3226795A (en) * 1959-08-12 1966-01-04 Celanese Corp Method for producing a high bulk filamentary material
US3227791A (en) * 1962-08-08 1966-01-04 Eastman Kodak Co Process for producing tobacco smoke filter elements from cellulose ester filaments containing polyethylene glycol
US3232268A (en) * 1962-05-15 1966-02-01 Celanese Corp Apparatus for lubricating cigarette-filter-forming filamentary material
US3255580A (en) * 1959-05-22 1966-06-14 Spunize Co Of America Inc Method of blending or combining fibers and product
US3346682A (en) * 1962-03-16 1967-10-10 Du Pont Method for making a filtering medium from plexifilamentary material
US3366521A (en) * 1967-01-30 1968-01-30 Celanese Corp Method for the production of cellulose acetate cigarette filter tips
US3393120A (en) * 1965-09-22 1968-07-16 Eastman Kodak Co Polyolefin tow for cigarette filters
US3396073A (en) * 1966-05-05 1968-08-06 Eastman Kodak Co Filter tow of crimped continuous polyolefin filaments
DE1275428B (de) * 1960-06-17 1968-08-14 Eastman Kodak Co Verfahren zur Herstellung von Tabakrauchfilterelementen
US3402096A (en) * 1967-04-13 1968-09-17 Monsanto Co Variable bulk continuous filament yarn
US3438806A (en) * 1965-05-20 1969-04-15 American Cyanamid Co Process for the manufacture of cigarette containing cyanamide-cellulose acetate filter elements
US3640742A (en) * 1967-07-03 1972-02-08 Eastman Kodak Co Plasticizer blend for cellulose esters
US4243053A (en) * 1979-02-05 1981-01-06 Gulf & Western Company Filter cigar
US4369117A (en) * 1980-05-12 1983-01-18 American Hospital Supply Corporation Serum separating method and apparatus
US5225277A (en) * 1989-11-17 1993-07-06 Daicel Chemical Industries, Ltd. Acetate tow having high crimp modulus and manufacturing method thereof
EP0880907A2 (en) 1997-05-29 1998-12-02 Eastman Chemical Company Environmentally disintegratable tobacco smoke filter rod and method for producing same
US5970988A (en) * 1992-05-27 1999-10-26 Eastman Kodak Company Environmentally non-persistant cellulose ester fibers
US20050066493A1 (en) * 2003-09-26 2005-03-31 Celanese Acetate, Llc Method and apparatus for making an absorbent composite
US7152288B1 (en) * 2005-07-07 2006-12-26 Celanese Acetate Llc Stuffer box crimper and a method for crimping
WO2008017958A2 (en) * 2006-08-08 2008-02-14 Philip Morris Products S.A. Rapidly degradable filters by electron ionization
US20110036366A1 (en) * 2009-08-11 2011-02-17 R.J. Reynolds Tobacco Company Degradable filter element
US20110203228A1 (en) * 2003-02-14 2011-08-25 Eastman Chemical Company Packages, packaging systems, methods for packaging and apparatus for packaging
WO2012003092A1 (en) 2010-06-30 2012-01-05 R.J. Reynolds Tobacco Company Degradable filter element for smoking article
WO2012012053A1 (en) 2010-06-30 2012-01-26 R.J. Reynolds Tobacco Company Biodegradable cigarette filter
WO2012016051A2 (en) 2010-07-30 2012-02-02 R. J. Reynolds Tobacco Company Filter element comprising multifunctional fibrous smoke-altering material
WO2012166302A2 (en) 2011-05-31 2012-12-06 R.J. Reynolds Tobacco Company Coated paper filter
WO2012177482A1 (en) 2011-06-23 2012-12-27 Eastman Chemical Company Filters having improved degradation and methods of making them
WO2012177483A1 (en) 2011-06-23 2012-12-27 Eastman Chemical Company Cellulose esters having mixed-phase titanium dioxide particles for improved degradation
WO2013009410A1 (en) 2011-07-14 2013-01-17 R. J. Reynolds Tobacco Company Segmented cigarette filter for selective smoke filtration
WO2013019413A2 (en) 2011-08-01 2013-02-07 R.J. Reynolds Tobacco Company Degradable cigarette filter
WO2013019616A2 (en) 2011-07-29 2013-02-07 R. J. Reynolds Tobacco Company Plasticizer composition for degradable polyester filter tow
WO2014099468A1 (en) 2012-12-20 2014-06-26 Eastman Chemical Company Surface attachment of particles to cellulose ester fibers
US20150012228A1 (en) * 2011-10-26 2015-01-08 Tews Elektronik Gmbh & Co. Kg Method for online measurement of a plasticizer in an endless filter rod and a device for producing an endless filter rod of the tobacco processing industry
WO2016040768A1 (en) 2014-09-12 2016-03-17 R. J. Reynolds Tobacco Company Tobacco-derived filter element
US9289012B2 (en) 2011-07-29 2016-03-22 R. J. Reynolds Tobacco Company Plasticizer composition for degradable polyester filter tow
US20160333507A1 (en) * 2014-01-08 2016-11-17 Daicel Corporation Method of and apparatus for manufacturing bloomed fiber material
WO2017187210A2 (en) 2016-04-25 2017-11-02 Optifilter Research Zrt. New cigarette filter containing alginite
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WO2023059853A1 (en) 2021-10-08 2023-04-13 Eastman Chemical Company Articles containing melt processable cellulose ester compositions comprising amorphous biofiller
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US11918036B2 (en) 2010-06-30 2024-03-05 R.J. Reynolds Tobacco Company Biodegradable cigarette filter

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126009A (en) * 1964-03-24 Filter-tips
US3224453A (en) * 1959-06-12 1965-12-21 Celanese Corp Filter cigarettes
US3220904A (en) * 1960-05-23 1965-11-30 Eastman Kodak Co Method of making a rigid filter for cigarettes
US3110642A (en) * 1960-09-09 1963-11-12 Eastman Kodak Co Method of producing a fibrous product from extruded organic thermoplastic filaments
US3095343A (en) * 1960-09-15 1963-06-25 United States Filter Corp Method for treating continuous filamentary tows
US3477445A (en) * 1962-05-15 1969-11-11 Celanese Corp Non-woven cigarette filter rod
US3229699A (en) * 1962-12-21 1966-01-18 Eastman Kodak Co Plasticized filter
US3297512A (en) * 1962-12-26 1967-01-10 Eastman Kodak Co Apparatus for forming rods from continuous filament tow
US3253969A (en) * 1963-04-30 1966-05-31 Eastman Kodak Co Process for making cigarette filter rods from crimped continuous filaments
US3111702A (en) * 1963-06-24 1963-11-26 United States Filter Corp Products formed from continuous filamentary tows
US3227164A (en) * 1963-07-23 1966-01-04 Eastman Kodak Co Tobacco smoke filter
US3396061A (en) * 1964-06-01 1968-08-06 Celanese Corp Smoke filters
US3310060A (en) * 1964-08-31 1967-03-21 Olin Mathieson Cellulosic filter for tobacco smoke
US3400032A (en) * 1965-02-03 1968-09-03 Brown & Williamson Tobacco Filter rod making machine
US3844199A (en) * 1968-09-27 1974-10-29 Hauni Werke Koerber & Co Kg Apparatus for producing filter rods or the like
DE2064536C2 (de) * 1970-12-30 1982-06-24 Hauni-Werke Körber & Co KG, 2050 Hamburg Vorrichtung zum fortlaufendem Umhüllen eines Filtermaterials der tabakverarbeitenden Industrie mit einem Umhüllungsstreifen
US3757631A (en) * 1971-05-24 1973-09-11 Kilgore Corp Method and apparatus for manufacturing sparklers
US3863645A (en) * 1974-06-11 1975-02-04 Us Agriculture Process for treating tobacco
US4756316A (en) * 1985-08-12 1988-07-12 Philip Morris Incorporated Method for producing a cigarette filter rod
US5282294A (en) * 1992-07-31 1994-02-01 Eastman Kodak Company Apparatus for producing layered material
DE4322965C1 (de) * 1993-07-09 1994-10-06 Rhodia Ag Rhone Poulenc Filtertow und Verfahren zu dessen Herstellung sowie dessen Verwendung als Tabakrauchfilterelement
DE4322967C1 (de) * 1993-07-09 1994-10-13 Rhodia Ag Rhone Poulenc Filtertow aus Celluloseacetat, dessen Herstellung und Verwendung als Tabakrauchfilterelement
JP3342763B2 (ja) * 1994-02-04 2002-11-11 ダイセル化学工業株式会社 シガレットフィルター素材
EP1380684A1 (de) * 2002-07-11 2004-01-14 Zschimmer & Schwarz GmbH & Co KG Chemische Fabriken Formulierung eines hochviskosen Mineralöls zur herstellung von Filtern für Tabakwaren
EP1574142A1 (en) * 2004-03-08 2005-09-14 Acetate Products Limited Process for making filter tow
US20050287368A1 (en) * 2004-06-25 2005-12-29 Celanese Acetate Llc Cellulose acetate tow and method of making same
US7585442B2 (en) * 2004-06-25 2009-09-08 Celanese Acetate, Llc Process for making cellulose acetate tow
GB0517551D0 (en) * 2005-08-27 2005-10-05 Acetate Products Ltd Process for making filter tow
CN102217799A (zh) * 2011-05-18 2011-10-19 滁州卷烟材料厂 含有维生素微粒的香烟过滤嘴及其生产方法
US20130115452A1 (en) * 2011-11-03 2013-05-09 Celanese Acetate Llc High Denier Per Filament and Low Total Denier Tow Bands
US8967155B2 (en) 2011-11-03 2015-03-03 Celanese Acetate Llc Products of high denier per filament and low total denier tow bands
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JP6626948B2 (ja) * 2018-10-02 2019-12-25 株式会社ダイセル 親水化されたセルロースアセテートトウバンド及びそれを用いた吸収体

Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US964489A (en) * 1908-08-14 1910-07-19 Luigi Campo Smoking-filter for the removal of the impurities from tobacco-smoke.
US1237026A (en) * 1917-01-31 1917-08-14 Francisco E Fonseca Smoke-filter for cigars and cigarettes.
US1520252A (en) * 1921-08-29 1924-12-23 John T Linklater Nicotine absorber
US1572342A (en) * 1921-03-22 1926-02-09 Charles E Wiltsey Method for making pipe filters
US1725829A (en) * 1923-01-26 1929-08-27 Celanese Corp Manufacture or treatment of threads of artificial filaments
US1967585A (en) * 1933-04-12 1934-07-24 Paul H Minton Absorbent filter cartridge for smoking appliances
US2089238A (en) * 1934-02-02 1937-08-10 Celanese Corp Crepe fabric and method of preparing same
US2159121A (en) * 1936-06-20 1939-05-23 American Mach & Foundry Filter tip for cigarettes
US2172946A (en) * 1935-09-04 1939-09-12 Roser B Sutter Tobacco smoke purifier
US2174573A (en) * 1936-05-01 1939-10-03 Celanese Corp Production of crimped cellulose derivative yarns
US2216810A (en) * 1935-06-14 1940-10-08 Celanese Corp Manufacture of artificial yarns
US2228383A (en) * 1939-11-22 1941-01-14 Berl Ernst Tobacco smoke filtering
US2259150A (en) * 1940-02-29 1941-10-14 Eastman Kodak Co Production of crimped cellulose derivative staple fibers
US2271184A (en) * 1940-12-31 1942-01-27 Dreyfus Camille Staple fiber and yarn
US2324838A (en) * 1936-06-13 1943-07-20 Harz Walter Filter material
US2369395A (en) * 1942-01-21 1945-02-13 American Viscose Corp Yarnlike structure
US2411660A (en) * 1943-05-22 1946-11-26 Fred W Manning Method of making filter cartridges, abrasive sheets, scouring pads, and the like
US2433531A (en) * 1940-07-30 1947-12-30 Kendall & Co Milk filter
US2465996A (en) * 1946-10-04 1949-04-05 Bloch Godfrey Yarn and fabric
US2476582A (en) * 1945-06-11 1949-07-19 Houdaille Hershey Corp Method of making filter units
US2502129A (en) * 1942-04-10 1950-03-28 American Viscose Corp Method of treating filamentary materials
GB665278A (en) * 1948-12-10 1952-01-23 British Celanese Improvements in or relating to cigarette filter tips
US2688380A (en) * 1951-07-13 1954-09-07 American Viscose Corp Filter cartridge

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1550396A (en) * 1924-11-08 1925-08-18 Borne Scrymser Company Method of oiling cotton raw stock
US1876326A (en) * 1929-09-10 1932-09-06 Lant Richard Treatment of petrol and other organic liquids containing water
US2127586A (en) * 1933-12-05 1938-08-23 Celanese Corp Pile fabric and method of making the same
US2126422A (en) * 1934-03-27 1938-08-09 John G Tarrant Attachment for smoking devices
US2221443A (en) * 1936-04-28 1940-11-12 Davidson Glenn Mouthpiece cigarette manufacture
US2171770A (en) * 1937-04-20 1939-09-05 Hartford Empire Co Cigarette tip
GB501436A (en) * 1937-05-24 1939-02-24 Wallach Roger Improvements relating to yarns, threads and cords, and to textile fabrics made therefrom or incorporating them
US2311174A (en) * 1940-12-06 1943-02-16 Du Pont Textile crinkler
US2484003A (en) * 1943-02-13 1949-10-04 Owens Corning Fiberglass Corp Parallel glass fiber unit
US2394165A (en) * 1943-04-23 1946-02-05 Getaz James Louis Processing of synthetic fibers
US2483406A (en) * 1943-11-20 1949-10-04 American Viscose Corp Process and apparatus for producing fibrous materials
US2461043A (en) * 1944-11-10 1949-02-08 American Viscose Corp Process of conditioning cellulose ester filaments
US2623266A (en) * 1946-11-23 1952-12-30 Sandoz Ltd Crimped fibers, filaments, and threads
US2525997A (en) * 1948-03-23 1950-10-17 Edwin G Beier Yarn conditioning device
US2707308A (en) * 1948-12-10 1955-05-03 British Celanese Method of making a filter element
US2789563A (en) * 1948-12-10 1957-04-23 British Celanese Filter elements
NL164588B (nl) * 1949-10-14 Uniroyal Werkwijze voor de bereiding van een verwerkbaar thermo- plastisch mengsel en gevormd voortbrengsel daaruit.
US2690426A (en) * 1950-03-07 1954-09-28 Atlas Powder Co Lubricating compositions
US2668785A (en) * 1950-04-03 1954-02-09 Atlas Powder Co Filamentous textile having a processing finish
US2676128A (en) * 1951-06-18 1954-04-20 Du Pont Process of preparing nonwoven fabric and product
US2747233A (en) * 1952-07-25 1956-05-29 Du Pont Adjustable stop crimper
CA639825A (en) * 1952-12-05 1962-04-17 Eastman Kodak Company Filter tow treated with sorbitan compounds
US2811770A (en) * 1953-12-08 1957-11-05 Du Pont Preparation of tow from filaments of acrylonitrile polymers

Patent Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US964489A (en) * 1908-08-14 1910-07-19 Luigi Campo Smoking-filter for the removal of the impurities from tobacco-smoke.
US1237026A (en) * 1917-01-31 1917-08-14 Francisco E Fonseca Smoke-filter for cigars and cigarettes.
US1572342A (en) * 1921-03-22 1926-02-09 Charles E Wiltsey Method for making pipe filters
US1520252A (en) * 1921-08-29 1924-12-23 John T Linklater Nicotine absorber
US1725829A (en) * 1923-01-26 1929-08-27 Celanese Corp Manufacture or treatment of threads of artificial filaments
US1967585A (en) * 1933-04-12 1934-07-24 Paul H Minton Absorbent filter cartridge for smoking appliances
US2089238A (en) * 1934-02-02 1937-08-10 Celanese Corp Crepe fabric and method of preparing same
US2216810A (en) * 1935-06-14 1940-10-08 Celanese Corp Manufacture of artificial yarns
US2172946A (en) * 1935-09-04 1939-09-12 Roser B Sutter Tobacco smoke purifier
US2174573A (en) * 1936-05-01 1939-10-03 Celanese Corp Production of crimped cellulose derivative yarns
US2324838A (en) * 1936-06-13 1943-07-20 Harz Walter Filter material
US2159121A (en) * 1936-06-20 1939-05-23 American Mach & Foundry Filter tip for cigarettes
US2228383A (en) * 1939-11-22 1941-01-14 Berl Ernst Tobacco smoke filtering
US2259150A (en) * 1940-02-29 1941-10-14 Eastman Kodak Co Production of crimped cellulose derivative staple fibers
US2433531A (en) * 1940-07-30 1947-12-30 Kendall & Co Milk filter
US2271184A (en) * 1940-12-31 1942-01-27 Dreyfus Camille Staple fiber and yarn
US2369395A (en) * 1942-01-21 1945-02-13 American Viscose Corp Yarnlike structure
US2502129A (en) * 1942-04-10 1950-03-28 American Viscose Corp Method of treating filamentary materials
US2411660A (en) * 1943-05-22 1946-11-26 Fred W Manning Method of making filter cartridges, abrasive sheets, scouring pads, and the like
US2476582A (en) * 1945-06-11 1949-07-19 Houdaille Hershey Corp Method of making filter units
US2465996A (en) * 1946-10-04 1949-04-05 Bloch Godfrey Yarn and fabric
GB665278A (en) * 1948-12-10 1952-01-23 British Celanese Improvements in or relating to cigarette filter tips
US2688380A (en) * 1951-07-13 1954-09-07 American Viscose Corp Filter cartridge

Cited By (92)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126095A (en) * 1964-03-24 Debundlized tow
US2953838A (en) * 1952-12-05 1960-09-27 Eastman Kodak Co Tow for use in the production of tobacco smoke filters
US2953837A (en) * 1952-12-05 1960-09-27 Eastman Kodak Co Filter tow made from fine filaments and low total denier
US2909182A (en) * 1954-12-09 1959-10-20 Pluess Staufer North American Tobacco smoke filters
US2908045A (en) * 1955-10-20 1959-10-13 Eastman Kodak Co Method for removing false twist and longitudinal folds from continuous filament crimped tow
US3065519A (en) * 1957-03-07 1962-11-27 English Rose Ltd Method of producing crimped thermoplastic yarns
US2974101A (en) * 1957-05-22 1961-03-07 Rohm & Haas Ion-exchange assemblies and methods of treating liquids
DE1182571B (de) * 1957-08-10 1964-11-26 Mueller Paul A Vorrichtung zum Herstellen von Tabakwarenfiltern
US3016581A (en) * 1957-11-07 1962-01-16 Eastman Kodak Co Apparatus for opening continuous multifilament crimped tow
US3095632A (en) * 1957-11-07 1963-07-02 Eastman Kodak Co Method for continuously opening crimped tow
US3026226A (en) * 1957-12-09 1962-03-20 Eastman Kodak Co Process of manufacturing filters
US3021242A (en) * 1957-12-16 1962-02-13 Eastman Kodak Co Bonding additives onto filament filters
US3079663A (en) * 1958-05-21 1963-03-05 Eastman Kodak Co Method and apparatus for producing tobacco smoke filters
US3093583A (en) * 1958-10-14 1963-06-11 Robert Bosch G M B H Fa Filters and processes for manufacturing the same
US3043736A (en) * 1959-03-02 1962-07-10 Eastman Kodak Co Method for making additive filters
US3255580A (en) * 1959-05-22 1966-06-14 Spunize Co Of America Inc Method of blending or combining fibers and product
US3103220A (en) * 1959-06-12 1963-09-10 Celanese Corp Filter cigarettes
US3205107A (en) * 1959-07-02 1965-09-07 Eastman Kodak Co Process for making filament tobacco smoke filters
US3226795A (en) * 1959-08-12 1966-01-04 Celanese Corp Method for producing a high bulk filamentary material
US3050430A (en) * 1959-11-12 1962-08-21 Eastman Kodak Co Jet and method of filter manufacture
US3016945A (en) * 1960-04-25 1962-01-16 Eastman Kodak Co Method and apparatus for forming tobacco smoke filters
US3099594A (en) * 1960-05-05 1963-07-30 Eastman Kodak Co Method for blooming filter tow
US3038478A (en) * 1960-05-23 1962-06-12 Eastman Kodak Co Method for producing rigid tobacco smoke filters
DE1275428B (de) * 1960-06-17 1968-08-14 Eastman Kodak Co Verfahren zur Herstellung von Tabakrauchfilterelementen
US3080611A (en) * 1960-11-08 1963-03-12 Eastman Kodak Co Method for the production of cigarette filters
US3173188A (en) * 1961-11-03 1965-03-16 Eastman Kodak Co Tobacco smoke filter formation
US3346682A (en) * 1962-03-16 1967-10-10 Du Pont Method for making a filtering medium from plexifilamentary material
US3232268A (en) * 1962-05-15 1966-02-01 Celanese Corp Apparatus for lubricating cigarette-filter-forming filamentary material
US3194002A (en) * 1962-07-25 1965-07-13 Eastman Kodak Co Multifilament yarn of non-regular cross section
US3227791A (en) * 1962-08-08 1966-01-04 Eastman Kodak Co Process for producing tobacco smoke filter elements from cellulose ester filaments containing polyethylene glycol
US3177872A (en) * 1962-11-23 1965-04-13 Eastman Kodak Co Vaginal tampon and applicator
US3202155A (en) * 1964-06-05 1965-08-24 Eastman Kodak Co Light weight cigarette filter
US3438806A (en) * 1965-05-20 1969-04-15 American Cyanamid Co Process for the manufacture of cigarette containing cyanamide-cellulose acetate filter elements
US3393120A (en) * 1965-09-22 1968-07-16 Eastman Kodak Co Polyolefin tow for cigarette filters
US3396073A (en) * 1966-05-05 1968-08-06 Eastman Kodak Co Filter tow of crimped continuous polyolefin filaments
US3366521A (en) * 1967-01-30 1968-01-30 Celanese Corp Method for the production of cellulose acetate cigarette filter tips
US3402096A (en) * 1967-04-13 1968-09-17 Monsanto Co Variable bulk continuous filament yarn
US3640742A (en) * 1967-07-03 1972-02-08 Eastman Kodak Co Plasticizer blend for cellulose esters
US4243053A (en) * 1979-02-05 1981-01-06 Gulf & Western Company Filter cigar
US4369117A (en) * 1980-05-12 1983-01-18 American Hospital Supply Corporation Serum separating method and apparatus
US5225277A (en) * 1989-11-17 1993-07-06 Daicel Chemical Industries, Ltd. Acetate tow having high crimp modulus and manufacturing method thereof
US5618620A (en) * 1989-11-17 1997-04-08 Daicel Chemical Industries, Ltd. Filter rod for filtering the smoke of a cigarette
US5970988A (en) * 1992-05-27 1999-10-26 Eastman Kodak Company Environmentally non-persistant cellulose ester fibers
US6133439A (en) * 1992-05-27 2000-10-17 Eastman Chemical Company Environmentally non-persistant cellulose ester fibers
EP0880907A2 (en) 1997-05-29 1998-12-02 Eastman Chemical Company Environmentally disintegratable tobacco smoke filter rod and method for producing same
US5947126A (en) * 1997-05-29 1999-09-07 Eastman Chemical Co. Environmentally disintegratable tobacco smoke filter rod
US20110203228A1 (en) * 2003-02-14 2011-08-25 Eastman Chemical Company Packages, packaging systems, methods for packaging and apparatus for packaging
US9598184B2 (en) 2003-02-14 2017-03-21 Eastman Chemical Company Method for packaging fiber material
US8671652B2 (en) 2003-02-14 2014-03-18 Eastman Chemical Company Packages, packaging systems, methods for packaging and apparatus for packaging
US20050066493A1 (en) * 2003-09-26 2005-03-31 Celanese Acetate, Llc Method and apparatus for making an absorbent composite
US6983520B2 (en) * 2003-09-26 2006-01-10 Celanese Acetate, Llc Method and apparatus for making an absorbent composite
US20070006433A1 (en) * 2005-07-07 2007-01-11 Celanese Acetate Llc Stuffer box crimper and a method for crimping
US7152288B1 (en) * 2005-07-07 2006-12-26 Celanese Acetate Llc Stuffer box crimper and a method for crimping
US7896011B2 (en) 2006-08-08 2011-03-01 Philip Morris Usa, Inc. Method of forming a filter component
WO2008017958A2 (en) * 2006-08-08 2008-02-14 Philip Morris Products S.A. Rapidly degradable filters by electron ionization
US20110132381A1 (en) * 2006-08-08 2011-06-09 Philip Morris Usa Inc. Rapidly degradable filters via electron ionization
WO2008017958A3 (en) * 2006-08-08 2008-05-02 Philip Morris Prod Rapidly degradable filters by electron ionization
US20080127988A1 (en) * 2006-08-08 2008-06-05 Philip Morris Usa Inc. Rapidly degradable filters via electron ionization
US9770053B2 (en) 2009-08-11 2017-09-26 R. J. Reynolds Tobacco Company Degradable filter element
US20110036366A1 (en) * 2009-08-11 2011-02-17 R.J. Reynolds Tobacco Company Degradable filter element
US8434498B2 (en) 2009-08-11 2013-05-07 R. J. Reynolds Tobacco Company Degradable filter element
WO2011019646A1 (en) 2009-08-11 2011-02-17 R.J. Reynolds Tobacco Company Degradable filter element
US11918036B2 (en) 2010-06-30 2024-03-05 R.J. Reynolds Tobacco Company Biodegradable cigarette filter
WO2012012053A1 (en) 2010-06-30 2012-01-26 R.J. Reynolds Tobacco Company Biodegradable cigarette filter
WO2012003092A1 (en) 2010-06-30 2012-01-05 R.J. Reynolds Tobacco Company Degradable filter element for smoking article
WO2012016051A2 (en) 2010-07-30 2012-02-02 R. J. Reynolds Tobacco Company Filter element comprising multifunctional fibrous smoke-altering material
US8720450B2 (en) 2010-07-30 2014-05-13 R.J. Reynolds Tobacco Company Filter element comprising multifunctional fibrous smoke-altering material
US9119420B2 (en) 2010-07-30 2015-09-01 R.J. Reynolds Tobacco Company Filter element comprising multifunctional fibrous smoke-altering material
WO2012166302A2 (en) 2011-05-31 2012-12-06 R.J. Reynolds Tobacco Company Coated paper filter
WO2012177483A1 (en) 2011-06-23 2012-12-27 Eastman Chemical Company Cellulose esters having mixed-phase titanium dioxide particles for improved degradation
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WO2013009410A1 (en) 2011-07-14 2013-01-17 R. J. Reynolds Tobacco Company Segmented cigarette filter for selective smoke filtration
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US8973588B2 (en) 2011-07-29 2015-03-10 R.J. Reynolds Tobacco Company Plasticizer composition for degradable polyester filter tow
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WO2013019413A2 (en) 2011-08-01 2013-02-07 R.J. Reynolds Tobacco Company Degradable cigarette filter
US20150012228A1 (en) * 2011-10-26 2015-01-08 Tews Elektronik Gmbh & Co. Kg Method for online measurement of a plasticizer in an endless filter rod and a device for producing an endless filter rod of the tobacco processing industry
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Publication number Publication date
US2953837A (en) 1960-09-27
FR1217725A (fr) 1960-05-05
CA639824A (en) 1962-04-17
MY6400115A (en) 1964-12-31
ES212532A1 (es) 1954-05-16
US2953838A (en) 1960-09-27
DE1407402B (de) 1969-09-04
CA639825A (en) 1962-04-17
IT599386A (nl)
GB909940A (en) 1962-11-07
US2900988A (en) 1959-08-25

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