US3393120A - Polyolefin tow for cigarette filters - Google Patents

Polyolefin tow for cigarette filters Download PDF

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Publication number
US3393120A
US3393120A US489329A US48932965A US3393120A US 3393120 A US3393120 A US 3393120A US 489329 A US489329 A US 489329A US 48932965 A US48932965 A US 48932965A US 3393120 A US3393120 A US 3393120A
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United States
Prior art keywords
tow
filter
filaments
fibers
polyolefin
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Expired - Lifetime
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US489329A
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English (en)
Inventor
George P Touey
Robert C Mumpower
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Eastman Kodak Co
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Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US489329A priority Critical patent/US3393120A/en
Priority to BE687090D priority patent/BE687090A/xx
Priority to IT21762/66A priority patent/IT1043763B/it
Priority to GB42315/66A priority patent/GB1147799A/en
Priority to US688291A priority patent/US3501361A/en
Application granted granted Critical
Publication of US3393120A publication Critical patent/US3393120A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • 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
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/47—Processes of splitting film, webs or sheets
    • 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
    • Y10T428/2967—Synthetic resin or polymer
    • 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

  • This invention relates to a tow material that is particularly useful for the manufacture of tobacco smoke filters. More particularly, this invention relates to a modified type of crimped polyolefin which, due to its plasticizer sensitivity and the structure of its filaments, is more suitable as an intermediate for the production of cigarette filters than are those heretofore known and used crimped tows made of melt spun filaments. Specifically, this invention relates to plasticizer bondable crimped filter tows the fibers of which are obtained by drafting and fibrillating a melt extruded film of polypropylene containing polystyrene as an additive, and to tobacco smoke filters made therefrom.
  • cellulose acetate or other like spun fibers have enjoyed such popularity in the tobacco filter industry.
  • cellulose acetate filter tow is its sensitivity to liquid, essentially nonvolatile, plasticizers.
  • a nonvolatile, oily, liquid plasticizer such as glycerol triacetate can be added to the tow to produce a firm filter element.
  • This firmness of the cellulose acetate filter element is produced by the plasticizer liquid gradually dissolving and bonding together adjacent fibers within the filter at random points of contact.
  • Such a rigid filter structure can then be easily and cleanly cut into smaller segments the size of a filter tip.
  • a cellulose acetate filter tow has numerous other features which are highly desirable, if not manditory, for any tobacco smoke filter, especially those to be used on cigarettes. These additional features include being nontoxic, nonodorous, white, and stable to storage under varying conditions of humidity and temperature.
  • additional features include being nontoxic, nonodorous, white, and stable to storage under varying conditions of humidity and temperature.
  • filter tow made from cellulose acetate or other like spun filamentary materials leave something to be desired in reference to their general physical characteristics.
  • these filamentary materials are inherently straight with very smooth outer surfaces. In addition to this they are relatively weak and, in the case of cellulose acetate, somewhat more expensive to produce than certain other types of synthetic materials.
  • these crimps have been produced mechanically by means of intermeshing gear-like elements, by means of a stutter-box type crinkler, or by twisting the fibers, setting the twist, and then untwisting.
  • this crimping operation is somewhat time consuming and adds to the over-all expense of the finished filtered product it nevertheless has been reasonably successful and is widely accepted by the industry since it not only results in the breaking up of those channels which would otherwise exist in the interstices between the fibers, but also increases the bulk factor of the fibers.
  • the crimped tow be made of a melt spun polyolefin fiber.
  • These new fibers can be made into a tow that has certain very definite advantages over a cellulose acetate type tow as a filter intermediate. For example, in addition to being potentially less expensive than a tow of cellulose acetate fibers it is considerably stronger and can, therefore, be processed to have a much higher crimp count without being rendered too weak to be processed into filter rods on existing commercial equipment.
  • a tow made of melt spun polyolefin fibers can be crimped to contain to crimps/inch and the resulting product has ample strength to permit its use in commercial filter forming equipment.
  • a high degree of crimp is given to a cellulose acetate tow, i.e., 20 crimp/inch or higher, it is rendered too weak to be processed into fibers on existing commercial equipment operating at practical speeds.
  • melt spun polyolefin fibers Another advantage of a tow of melt spun polyolefin fibers is its hydrophobic nature. Because of this during the smoking of the tobacco product the filter shows no tendency whatsoever to become soggy or distorted because of the retention of water from the smoke or from the smokers month. Also, its low moisture pickup prevents the filter from drying the smoke and thereby making it distasteful.
  • a filter tow of spun polyolefin fibers has certain advantages over a tow of cellulose acetate fibers it too has some disadvantages.
  • These disadvantages include the fact that conventional, inexpensive high boiling plasticizers such as glycerol triacetate, triethylene glycol diacetate, diethyl phthalate, dibutyl phthalate, and the like will not fuse the fibers together at random points to produce a firm filter rod as they do in thecase of cellulose acetate tow filters. This means that a difficult to-cut, heavy paper wrap must be placed around the rod instead of the easy-to-cut, thin paper wrappers commercially used for cigarette filter rods.
  • a plasticizer sensitive and structurely strong tow material can be produced which forms an exceptionally good intermediate for the production of tobacco smoke filters.
  • This new and novel material is obtained by drafting and fibrillating a melt extruded film of polypropylene containing a polystyrene additive.
  • the ribbon-like, flat fibrous material thus produced is easily formed into a filter element on standard equipment operated in a conventional manner to give a tobacco smoke filter having very high tar and nicotine removable capabilities.
  • an object of this invention is to produce a new and improved polyolefin type of crimped tow which can be used as a tobacco smoke filter intermediate.
  • Another object of this invention is to disclose a plasticizer sensitive and structurely strong polyolefin type material that can be used to produce a filter tow having an extremely high crimp count.
  • Yet another object of this invention is to disclose a highly crimped polyolefin tow, the filaments of which contain tiny hairlike splinters or fibrils which are firmly attached to and form an integral part of the filaments.
  • a further object of this invention is to disclose a polyolefin tow that can be highly crimped, fibrillated and treated with high boiling, oily plasticizers to give a firm cigarette filter.
  • a still further object of this invention is to disclose an inexpensive cigarette filter that is formed from a highly crimped, fibrillated and plasticized treated polyolefin tow which is very effective for the removal of the tar and nicotine found in the efiiuent stream of tobacco smoke.
  • FIGURE 1 is a diagrammatic illustration on an enlarged scale of a bundle of smooth surface filaments such as cellulose acetate;
  • FIGURE 2 is a diagrammatic illustration on an enlarged scale of a bundle of fibrillated and bonded polyolefin-polystyrene filaments made in accordance with this invention.
  • FIGURE 3 illustrates a cigarette having attached to the tip thereof a tobacco smoke filter made from fibrillated and bonded polyolefin-polystyrene filaments.
  • reference numeral 10 is used to generally designate a bundle of crimped cellulose acetate fibers.
  • the outer surface of each fiber 12 is substantially smooth and thus large channels or openings 14 exists between the various fibers through which the tobacco smoke may pass without encountering any filtering action.
  • the fibers are shown bonded together at 16 by a suitable high boiling, oily plasticizer.
  • FIGURE 2 illustrates a bundle 18 of fibers taken from a highly crimped filter tow formed in accordance with this invention from a multiplicity of highly fibrillated continuous fibers composed of from 40 to 70 percent polya-olefins and from 60 to 30 percent polystyrene.
  • the individual filaments 20 of this type tow are entirely different in appearance from the smooth surfaced, substantially rounded filaments 12 of FIGURE 1 which were obtained from a conventional wet, dry, or melt spinning process.
  • This highly important difierence is that the polyolefin-polystyrene fibers 20 are flat and ribbon-like in appearance with a thickness of from 15 to microns which permits them to be fibrillated to produce the desired results.
  • these fine splinter fibrils 22 which have a thickness from about 0.5 micron to about 15 microns, extend into the spaces 24- that exist between the various fibers 20 and therefore allow less of the solid tobacco smoke constituents carried in the effluent stream of smoke to pass therethrough.
  • the filaments 20 may be fibrillated to the point that the splinter or fibril filaments 22 represent from to 70 percent of the total make-up of the crimped filter tow 18. Below this value of fibrillation there are not enough of these fine fibrils in the tow to render it very effective as a filter material while above this value the main continuous trunk portion of the filaments 20 is so reduced in size as to substantially weaken the tow thereby making it too weak to be processed into filter rods on standard equipment.
  • the preferred ratio of fibrillation of the tow has been found to be 20 to 50 percent splinted fibrils and 50 to 80 percent ribbon-like filaments.
  • the total number of filaments in the filter tow which includes both the ribbon-like filaments 20 and fibrils 22, can vary over a wide range since their thickness can vary from 0.5 to about microns for the fibril type to over 100 microns for the heavier ribbon-like type. Therefore, in terms of total denier it can be said that the tow 18 may vary from about 20,000 total denier to 150,000 total denier.
  • polyolefin fibers per se cannot be bonded together with, a high boiling, oily plasticizer.
  • the filaments 20 were made plasticizer sensitive by placing at least 30 percent by weight of polystyrene in the polyolefin spinning dope.
  • the tow 18 is rendered plasticizer sensitive and can be bonded together by a plasticizer as illustrated at 26 in FIGURE 2.
  • this capability of the polyolefin-polystyrene filter material of this invention is of utmost importance.
  • the percentage of polystyrene added is somewhat critical with the optimum amount of polystyrene additive having been found to be between 35 and 50 percent by weight. Lower amounts of polystyrene give a filter tow that cannot be hardened by the application of a plasticizer while, conversely, too much polystyrene (over 60 percent) makes the tow too weak to withstand the tension applied to it during the filter rod making process.
  • the type of polyolefin in the mixture of polyolefin and styrene from which the filaments of the tow are made can be any of the film-forming types with molecular weights from about 10,000 to 900,000. Preferably the molecular weight should be between 25,000 and 200,000. Their softening points should be between 70 C. and 160 C. Of the several polyolefin materials produced industrially the preferred ones are polyethylene and polypropylene or copolymers of ethylene and propylene.
  • the polystyrene can have a molecular weight of from 5,000 to 500,000; the preferred range in molecular weight being from 10,000 to 100,000.
  • the softening point of the polystyrene should fall between -.100 C. and 160 C., and preferably between 130 C. and 150 C. Both polymers may contain substituent groupings providing such groupings do not change the softening points beyond those stipulated.
  • the fibrillated filaments from which this novel filter tow is made can be produced by any of the known techniques for fracturing elongated polymeric strands so that splinter type fibrils extend from them.
  • the preferred technique is the one disclosed in pending application 446,059, filed Apr. 6, 1965, and assigned to the same assignee as this invention.
  • This method fibrillating ribbonlike filaments is simple, economical, and can be carried out in one continuous operation. For example, a, blend of the polyolefin and the polystyrene is melt extruded into a film which is then continuously drafted and fibrillated into fracture-d, ribbon-like filaments. A number of these filaments are gathered together to produce the tow of this invention.
  • the polyolefin-polystyrene filter tow should be erimped.
  • the number of crimps placed in filter tow 18 should be sufficiently high to raise the bulk factor of the tow to the point where it fills out the cigarette filter rod.
  • This crimp value has been found to be between '15 and '50 crimps/inch with the preferred number of crimps being bet-ween 20 and 30.
  • These crimps can be applied to the tow by any suitable method such as a conventional stutfer box crimping device known in the textile art.
  • Example 1 Highly fibrillated filaments formed from a melt extruded film of 50 percent polypropylene (mol. wt. 32,000) and 50 percent polystyrene (mol. wt. 10,000) were prepared according to the procedures given in the aforementioned application Ser. No. 446,059. Microscopic examination of the filaments indicated that there were many tiny hairlike projections extended outwardly from the larger trunk portion of the continuous filaments and that these fibrils had a thickness of from 1 to 10 microns. A 250-ft. length of tow of 60,000 total denier was produced from these filaments and was given 30 crimps/inch through the use of a stuffer box. The crirnped tow was then processed into filter rods (25.4 mm.
  • tar signifies the liquid-solid particles of cigarette smoke. Since it is known that the nicotine is an integral part of these particles a filter which removes particles by impingement removes the same percentage or amount of nicotine as tar.
  • Example 2 Highly fibrillated filaments formed from a melt extruded film of 65 percent polyethylene (mol. wt. 42,000) and 35 per-cent polystyrene (mol. wt. 12,500) were prepared according to the procedure disclosed in application Ser. No. 446,059. A ZOO-ft. crimped (25 crimps/inch) tow of 65,000 total denier was prepared from these filaments which consisted of about 35 percent of the fibril type and 65 percent of the heavier and parallel type. During the passage of the two through the cigarette filter rod making machine it was bloomed out at one point and sprayed with dibutyl phthalate. The plasticizer treated and cigarette paper wrapped rods contained 8 percent plasticizer. About 45 minutes after the filter rods were made they were firm enough to be cleanly cut into 15 mm. filter tip segments.
  • Example 3 Highly fibrillated filaments formed from a melt extruded film of 45 percent polypropylene (mol. wt. 60,000) 55 percent polystyrene (mol. wt. 15,000) were prepared according to the procedure disclosed in application Ser. No. 446,059. A ZOO-ft. crimped tow (30 crimps per inch) of 70,000 total denier was prepared from these filaments which consisted of about 50 percent the fibril type and 50 percent the heavier parallel type. During the passage of the tow through the rod making machine it was bloomed out at one point and treated with 10 percent di-(Z-ethylhexyl) phthalate by means of a wicking device which wiped the plasticizer on the filaments. The final paper wrapped filter rods were firm enough to be cleanly cut into small mm. filter segments about 1 hour after they were prepared.
  • the highly-crimped, fibrillated, plasticizer sensitive polyolefinpolystyrene filter tow of this invention offers numerous advantages over those tows heretofore known and used to produce tobacco smoke filter elements.
  • the tow easily bonded by knOwn and commercially acceptable plasticizer, thus alleviating the need for using heavy wrapper papers or tacky adhesives, but the polyolefin-polystyrene, ribbon-like filaments are strong enough to permit high fibrillation and easy processing in existing commercial equipment. This high degree of fibrillation results in a more effective tar and nicotine filter than was heretofore thought possible.
  • a filamentary bundlelike product useful for the manufacture of tobacco smoke filter elements comprising a plurality of highly crimped, continuous filaments which are arranged substantially parallel to one-another to form a tow band, said filaments being composed of from 40 to 70 percent of a polyolefin having a molecular weight from about 10,- 000 to 900,000 with a softening point between 70 C. and 160 C. uniformly mixed with from 60 to 30 percent of a polystyrene having a molecular weight from about 5,000 to 500,000 with a softening point between C.
  • the new product being particularly characterized in that the filaments thereof are ribbon-like in appearance with a thickness of from about 15 to 100 microns, are highly fibrillated so that fine splinter fibrils having a thickness of between about 0.5 micron and about 15 microns extend therefrom, and are readily bendable together at points of contact by a plasticizer.
  • fibrillated filaments are composed of 50 to 65 percent of polyolefin and 50 to 35 percent of polystyrene.
  • polyolefin is selected from the group consisting of polypropylene and polyethylene.
  • a tobacco smoke filter element comprised of highly crimped, continuous filaments extending generally longitudinally of the filter element, said filaments being composed of from 40 to 70 percent of a polyolefin having a molecular weight from about 10,000 to 900,000 with a softening point between 70 C. and 160 C. uniformly mixed with from 60 to 30 percent of a polystyrene having a molecular weight from about 5,000 to 500,000 with a softening point between 100 C.
  • the filter element being particularly characterized in that the filaments thereof are (1) ribbon-like in appearance with a thickness of from about 15 to 100 microns (2) are highly fibrillated so that fine splinter fibrils having athickness of between about 0.5 micron and about 15 microns extend therefrom, and (3) are bonded together at random points by a plasticizer.
  • the tobacco smoke filter according to claim 12 wherein said filaments are produced by fibrillating a melt extruded film of a polypropylene containing 35 to 50 percent of a polystyrene.
  • the tobacco smoke filter according to claim 12 wherein said filaments are produced by fibrillating a melt-extruded film of a polyethylene containing 35 to 50 percent of a polystyrene.
  • the tobacco smoke filter according to claim 12 wherein said filaments are produced by fibrillating a meltextruded film of a coplymer of ethylene containing 35 to 50 percent of a polystyrene.
  • the tobacco smoke filter according to claim 12 wherein said filaments are produced by fibrillating a melt extruded film of a copolymer of propylene containin 35 to percent polystyrene.
  • the tobacco smoke filter according to claim 10 wherein the plasticizer is selected from the group consisting of diethyl phthalate, dibutyl phthalate, and di-(2- ethyl hexyl) phthalate.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
US489329A 1965-09-22 1965-09-22 Polyolefin tow for cigarette filters Expired - Lifetime US3393120A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US489329A US3393120A (en) 1965-09-22 1965-09-22 Polyolefin tow for cigarette filters
BE687090D BE687090A (en)) 1965-09-22 1966-09-19
IT21762/66A IT1043763B (it) 1965-09-22 1966-09-22 Stippino di poli olefine per filtri di sigarette
GB42315/66A GB1147799A (en) 1965-09-22 1966-09-22 Filamentary material
US688291A US3501361A (en) 1965-09-22 1967-10-18 Method for producing cigarette filters

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US489329A US3393120A (en) 1965-09-22 1965-09-22 Polyolefin tow for cigarette filters

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US3393120A true US3393120A (en) 1968-07-16

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US489329A Expired - Lifetime US3393120A (en) 1965-09-22 1965-09-22 Polyolefin tow for cigarette filters

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IT (1) IT1043763B (en))

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800808A (en) * 1971-11-26 1974-04-02 Brown & Williamson Tobacco Tobacco smoke filter
US3880173A (en) * 1972-04-20 1975-04-29 British Ropes Ltd Filter material for smoking article
US3882877A (en) * 1972-04-26 1975-05-13 Rothmans Of Pall Mall Filter for tobacco smoke
US4003110A (en) * 1971-12-29 1977-01-18 Robert A. Bennett Method of manufacturing the hook portions of a statistical hook and loop area fastener
US4017659A (en) * 1974-10-17 1977-04-12 Ingrip Fasteners Inc. Team lattice fibers
US4048371A (en) * 1974-10-17 1977-09-13 Ingrip Fasteners, Inc. Fasces fibers
US4171402A (en) * 1974-10-24 1979-10-16 Akzona, Inc. Textured yarn product
DE3129385A1 (de) * 1980-08-15 1982-06-03 Kennecott Engineered Systems Co., 44122 Cleveland, Ohio Praezisionswickelfilter
US4798570A (en) * 1982-12-09 1989-01-17 Hercules Incorporated Process for preparing filter rods
US5495859A (en) * 1993-04-14 1996-03-05 1149235 Ontario Inc. Cigarette smoke filter system
US5817159A (en) * 1996-12-31 1998-10-06 Cahill; Scott A. Filter with interpenetrating polymer network that biodegrades
WO2012103327A1 (en) 2011-01-28 2012-08-02 R. J. Reynolds Tobacco Company Polymeric materials derived from tobacco
US20170325496A1 (en) * 2014-11-21 2017-11-16 British American Tobacco (Investments) Limited Apparatus and Method for Filter Manufacture

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2794239A (en) * 1952-12-05 1957-06-04 Eastman Kodak Co Tow for use in the production of tobacco smoke filters
US3092891A (en) * 1958-08-01 1963-06-11 Montedison Spa Production of monofilaments obtained from highly viscous alpha-olefin polymers
US3112160A (en) * 1963-11-26 Method for producing textile yarn from a mono
US3121070A (en) * 1960-05-03 1964-02-11 Eastman Kodak Co Thermally modified polymers of polypropylene and other polymers and process for preparing the same
US3127915A (en) * 1960-07-01 1964-04-07 Phillips Petroleum Co Synthetic knopped filaments
US3220904A (en) * 1960-05-23 1965-11-30 Eastman Kodak Co Method of making a rigid filter for cigarettes

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3112160A (en) * 1963-11-26 Method for producing textile yarn from a mono
US2794239A (en) * 1952-12-05 1957-06-04 Eastman Kodak Co Tow for use in the production of tobacco smoke filters
US2953838A (en) * 1952-12-05 1960-09-27 Eastman Kodak Co Tow for use in the production of tobacco smoke filters
US3092891A (en) * 1958-08-01 1963-06-11 Montedison Spa Production of monofilaments obtained from highly viscous alpha-olefin polymers
US3121070A (en) * 1960-05-03 1964-02-11 Eastman Kodak Co Thermally modified polymers of polypropylene and other polymers and process for preparing the same
US3220904A (en) * 1960-05-23 1965-11-30 Eastman Kodak Co Method of making a rigid filter for cigarettes
US3127915A (en) * 1960-07-01 1964-04-07 Phillips Petroleum Co Synthetic knopped filaments

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800808A (en) * 1971-11-26 1974-04-02 Brown & Williamson Tobacco Tobacco smoke filter
US4003110A (en) * 1971-12-29 1977-01-18 Robert A. Bennett Method of manufacturing the hook portions of a statistical hook and loop area fastener
DK150961B (da) * 1972-04-20 1987-10-05 British Ropes Ltd Filtermateriale, isaer til filtrering af tobaksroeg, og fremgangsmaade til fremstilling deraf
US3880173A (en) * 1972-04-20 1975-04-29 British Ropes Ltd Filter material for smoking article
US3882877A (en) * 1972-04-26 1975-05-13 Rothmans Of Pall Mall Filter for tobacco smoke
US4017659A (en) * 1974-10-17 1977-04-12 Ingrip Fasteners Inc. Team lattice fibers
US4048371A (en) * 1974-10-17 1977-09-13 Ingrip Fasteners, Inc. Fasces fibers
US4171402A (en) * 1974-10-24 1979-10-16 Akzona, Inc. Textured yarn product
DE3129385A1 (de) * 1980-08-15 1982-06-03 Kennecott Engineered Systems Co., 44122 Cleveland, Ohio Praezisionswickelfilter
US4798570A (en) * 1982-12-09 1989-01-17 Hercules Incorporated Process for preparing filter rods
US5638833A (en) * 1993-04-14 1997-06-17 1149235 Ontario Inc. Cigarette smoke filter system
US5497791A (en) * 1993-04-14 1996-03-12 114935 Ontario Inc. Smoker's accessory
US5495859A (en) * 1993-04-14 1996-03-05 1149235 Ontario Inc. Cigarette smoke filter system
US5752527A (en) * 1993-04-14 1998-05-19 Ontario Inc. Smoker's accessory
US5817159A (en) * 1996-12-31 1998-10-06 Cahill; Scott A. Filter with interpenetrating polymer network that biodegrades
US5998500A (en) * 1996-12-31 1999-12-07 Cahill; Scott A. Method of making a filter with interpenetrating polymer network that biodegrades
WO2012103327A1 (en) 2011-01-28 2012-08-02 R. J. Reynolds Tobacco Company Polymeric materials derived from tobacco
US8893725B2 (en) 2011-01-28 2014-11-25 R. J. Reynolds Tobacco Company Polymeric materials derived from tobacco
US20170325496A1 (en) * 2014-11-21 2017-11-16 British American Tobacco (Investments) Limited Apparatus and Method for Filter Manufacture

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IT1043763B (it) 1980-02-29
GB1147799A (en) 1969-04-10
BE687090A (en)) 1967-03-01

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