US3548581A - Method and apparatus for ringless spinning of fiber-polymer yarns - Google Patents

Method and apparatus for ringless spinning of fiber-polymer yarns Download PDF

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US3548581A
US3548581A US778714A US3548581DA US3548581A US 3548581 A US3548581 A US 3548581A US 778714 A US778714 A US 778714A US 3548581D A US3548581D A US 3548581DA US 3548581 A US3548581 A US 3548581A
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rolls
polymer
strand
heater
fiber
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Emilian Bobkowicz
Andrew John Bobkowicz
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    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
    • D02G3/402—Yarns in which fibres are united by adhesives; Impregnated yarns or threads the adhesive being one component of the yarn, i.e. thermoplastic yarn

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  • the invention relates to a fundamentally novel concept of spinning yarns consisting of staple fiber-thermoplastic polymer blends or combinations, whereby the twist is imparted to said yarns and substantially retained therein between two fixed pinch points in a continuous linear sequence of operations.
  • Ring spinning now predominantly used, belongs to the first category, which also includes the flyer, cap and pot spinning.
  • the third method called Open End Spinning or Break Spinning is relatively new, although it has been in the development stage for many decades; it is now under test runs in some textile mills.
  • Its main technological disadvantage is the complexity of systems required to produce the needed discontinuity of the staple fibers while maintaining an open end by centrifugal forces for reassembly into a continuous twisted yarn with retained twist.
  • the obtained twisted yarn can however be linearly wound on a collecting roll, which constitutes the main advantage of the open end spinning, since this can approximately double the output speed as compared with ring spinning.
  • the maximum open end turbine speed presently attainable is about 30,000 r.p.m. and the count range is 20s to 60s. Linear output speeds of -200 feet per minute have been achieved with this system.
  • a further object of the invention is to provide a method and an apparatus which will enable manufacture of staple fiber-thermoplastic polymer yarns by means of a totally linear operation and at substantially higher production speeds than those of the presently known systems.
  • a still further object of the invention is to provide a relatively simple method and apparatus which will adequately exploit the technological advantages of applicants novel principle and achieve at high speeds and in a continuous sequence of operations linearly wound packages of spun staple fiber-thermoplastic polymer yarns ready for utilization.
  • the technological feasibility and important economical advantages of the present invention are based on the possibility to retain, to a substantial degree, the twist imparted to a consolidated, composite, continuous staple fiber-thermoplastic polymer stock-in material (tape, strand or the like) between two fixed pinch points, for example the stock-in material supply rolls. and the linear yarn collecting rolls, by providing between said pinch points a suitable heating zone through which the composite tape, strand or the like material passes and wherein it is heated to a point where the thermoplastic polymer substrate of the composite material becomes plastic without reaching the melting point of said polymer.
  • the composite material is then twisted in said zone while the polymer substrate is in such plastic condition to achieve interslippage of the polymer molecules and helical rearrangement of the fibers, and finally it is cooled to coagulate the polymer while the material is in such twisted condition, thus substantially retaining the achieved twist.
  • the basic method according to the present invention will therefore comprise the following steps:
  • the feed-in rolls for linearly supplying the continuous composite strand or tape and the collecting roll for linearly winding-up the obtained yarn constitute two fixed pinch points between which the twisting operation is effected.
  • thermoplastic resin strands from an extrusion die and lamination as well as consolidation thereof with suitable webs of staple fibers arranged at random or in parallel.
  • the extruded thermoplastic strands can also be stretched to achieve an initial degree of molecular orientation of the polymer.
  • the heating of the composite fibrous strands or tapes to the point of rendering the polymer substrate plastic but without reaching the melting point of said polymer substrate can be effectively accomplished by passing said composite strands or'tapes in a heater provided with longitudinal grooves generally in the form of V.
  • the composite fibrous strands or tapes are progressively heated while passing in these grooves to the point where the polymer substrate present therein acquires the desired plasticity.
  • the V shaped grooves can also be gradually narrowing towards the exit end of the heater so that the composite strands or tapes, passing therein, are simultaneously compressed, thus achieving a better interaction and consolidation between the polymer and the staple fibers, and ensuring the helical rearrangement of the loose staple ends during the twist imparting operation.
  • the heater should also be provided with adequate temperature control means because it is essential to adjust the temperature to the point where, as mentioned above, the polymer substrate will attain the desired degree of plasticity without reaching however the melting temperature of said polymer.
  • the torque is imparted to the composite fiborus strand or tape below the above-mentioned heating zone and the created twist travels upwards to the point of the greatest plasticity of the polymer where it is melted-in thus preventing formation of a counter torque which would tend to nullify the imparted twist. It can, for example, be imparted by means of any false twisting device which may revolve at speeds of up to 500,000 r.p.m.
  • the polymer substrate may reach a temperature very close to its melting point during the above described operation, it will not lose its formerly acquired molecular orientation because the polymer will be held at this temperature only for a very short period of time, in the order of a second of so, which however is sufiicient to impart the desired twist.
  • said orientation may, if desired, be further increased by driving the rolls which constitute the second pinch point at a higher speed than the first pinch point rolls.
  • the molecular orientation of the polymer is also increased by the twist imparting torque due to its consequent circular polymer stretching action.
  • V grooved heater having as many grooves of gradually narrowing V cross-section as there are composite strands or tapes coming out of the consolidating rolls so that each strand or tape can enter one groove of the heater; the V grooves preferably gradually narrow towards the exit end in order to produce a further compaction and improved co-action between the stable fibers and the polymer material as well as to ensure the helical rearrangement of the loose ends of the staple fibers during twisting;
  • a plurality of torque imparting devices e.g. of the false twisting type, following said heater, one for each strand or tape, for imparting to the latter a predetermined twist inside the grooves of the heater;
  • FIG. 1 is a generally schematic view of the basic method and apparatus of the present invention
  • FIG. 2 is another generally schematic view of a device which may be used in combination with the apparatus of FIG. 1;
  • FIG. 3 is a view of circumferentially grooved rolls in engaged condition, along line AA of FIG. 2;
  • FIG. 4 is a schematic illustration of one preferred complete operation according to the present invention.
  • FIG. 5 is a side view of a complete universal apparatus according to the present invention.
  • FIG. 6 is a view, partly in section, along line BB of FIG. 5.
  • FIGS. 7-12 are enlarged views of selected elements of FIG. 5.
  • FIG. 1 A composite fibrous staple fiber-thermoplastic polymer tape 10 is supplied to the pinch point of a pair of pick-up rolls 11, 12 which constitute the first fixed point within the scope of the invention. Then, said tape 10 is linearly fed by these rolls 11, 12 to the grooved heater 13 with heating means 14 which operate so as to enable adequate temperature control in the heater 13. It should be pointed out that the shape of the heater is preferential and by no means limitative and any heater with a proper temperature adjustment and control as well as with a proper fiber-restrictive zone can be used.
  • the heater should be such as to enable to achieve temperature and fiber-friction conditions which will render the thermoplastic polymer substrate of the composite tape 10 sufficiently plastic as to enable interslippage of its molecules and inter fiber slippage of the staple fibers and consequently twisting of the staple fibers bonded to the polymer substrate into a substantially helical arrangement.
  • This twisting is imparted from below by twister 16, preferably of the false-twister type, which is positioned below the heater 13 and at such a distance from the exit end 15 of said heater as to achieve cooling of the yarn twisted within the heater 13 and its coagulation in such twisted condition.
  • cooling and coagulation of the yarn in twisted form can result simply due to its passage through atmospheric air after its exit from the heater, however, one may also include suitable cooling means for that purpose, such as a water cooled jacket and/or a compressed air cooling zone.
  • twister 16 travels upwards from twister 16 to the heater 13 where it is melted-in into the continuous composite strand or tape having its polymer substrate in plastic condition.
  • the yarn After passing through twister 16, the yarn is picked up by a pair of pressure rolls 17, 18 which constitute the second fixed point according to the invention, and thereafter it is linearly wound on a collecting roll 19 to form the final spun yarn package 20. It is possible to eliminate rolls 17, 18 entirely since the collecting roll 19 itself may constitute the second fixed point, however, said rolls 17, 18 are preferred to keep the yarn under proper tension.
  • FIG. 2 shows an arrangement for direct production of composite tape 10 which can be used in combination with that of FIG. 1.
  • tape 10 can be produced by direct extrusion of a thermoplastic polymer strand or extrudate 23 from extruder die 22 of extruder 21 and its lamination and consolidation with a web of staple fibers 24 between rolls 11a and 12a.
  • the web of staple fibers 24 may be supplied from one or both sides of extrudate 23 towards the nip point of the laminating and consolidating rolls 11a, 12a, simultaneously with said extrudate 21 which is still in tacky condition after its extrusion from die 22.
  • Said web is then laminated and consolidated with said extrudate by pressure and cooling, ie by the action of said rolls 11a, 12a which may be internally cooled by cooling water or air.
  • the employed staple fiber webs may easily be produced by means of a drafting frame 25 such as used in the drawing of slivers or rovings or by aerodynamic systems which are well known in the art.
  • rolls 11a and 12a serve the same purpose as rolls 11, 12 in FIG. 1, namely for supplying composite tape 10 to the heater 13.
  • rolls 11, 12 of FIG. 1 would be replaced by rolls 11a, 12a of FIG. 2.
  • rolls 11a, 12a preferably have the form shown in FIG. 3.
  • six tapes at a time can be processed. This, of course, would require extrusion of a curtain of six strands 23 from die 22 and their simultaneous consolidation and lamination within the grooves 27 with six Webs 24 to form six composite tapes at a time.
  • the heater 13 will be modified to have the number of V grooves that will correspond to the number of composite tapes supplied by said rolls, in this particular example, six. Also, six twisting devices 16 will be required, one for each tape. Six collecting rolls 19 may also be used to form six packages 20 of spun yarn.
  • consolidating rolls 11a, 12a can be driven at a substantially higher speed (e.g. 10 times higher) than the extrusion rate of the polymer strand 23, thus producing stretching and, consequently, a good degree of molecular orientation of said polymer strand.
  • This together with the additional effects of helical fiber rearrangement as well as further stretching due to twisting, will enable achievement of a product of excellent strength and stability.
  • polymer strand 23 (or a plurality of such strands) is extruded from extruder 21 through die 22 and is thereafter stretched and oriented to a very high degree by means of orienting arrangement 30.
  • This arrangement is known in the art and usually consists of a pair of sets of godet rolls (each set having three rolls with each set running at a higher speed than the preceding set) interposed with a heater with proper temperature control. Strand 23 is thus first stretched to a desired degree by the first set of godet rolls then heated and finally stretched again by the second set of godet rolls.
  • Such treatment gives a very high degree of molecular orientation to the strand 23.
  • the oriented strand is passed through a heater arrangement 31, which preferably consists of a tunnel heater with adequate temperature control.
  • the strand 23 is heated only to such a degree that it will become tacky on the surface at the exit end of the heater without losing its previously acquired internal molecular orientation.
  • a heater arrangement 31 which preferably consists of a tunnel heater with adequate temperature control.
  • the strand 23 is heated only to such a degree that it will become tacky on the surface at the exit end of the heater without losing its previously acquired internal molecular orientation.
  • the strand 23 will travel at a speed of perhaps one thousand feet per minute or so and its residence time in the heating arrangement 31 will be insufficient to obtain relaxation of the polymer even if high temperatures prevail in said heater, although it will be sufiicient for imparting to said polymer strand a desired degree of tackiness.
  • the tackiness of strand 23, is, of course, necessary in order that it may be laminated and consolidated by rolls 11a, 12a with the web of staple fibers 24 to form a composite tape 10.
  • the staple fiber web 24 is supplied by supply arrangement 25 to the nip of rolls 11a, 12a and actually two such webs can be supplied for each strand, one from each side, so that the final composite tape 10 would consist of a polymer substrate fully surrounded with staple fibers having numerous loose ends sticking out and providing the desired fibrous surface texture.
  • This composite tape 10 is then processed as in the previous cases through heater 13 which preferably has its heating surface in the form of a gradually narrowing V groove toward exit end 15, so that further compaction between the polymer substrate and the surrounding staple fibers can be achieved as they pass through said heater.
  • the polymer substrate of the composite tape 10 is sufficiently plastic that the twist imparted by twister 16 and travelling upwards will produce interslippage of the polymer molecules and of the staple fibers bonded to the polymer substrate as well as coagulation of the yarn in such helically twisted condition due to subsequent cooling.
  • the twisted yarn passes linearly through the twister 16 and tension rolls 17, 18 and is linearly wound, at speeds up to and in some cases in excess of one thousand feet per minute, on the collecting roll 19 to form the final spun yarn package 20.
  • FIG. 5 illustrates one possible construction of a universal yet relatively simple and compact apparatus embodying the necessary features of the present invention while FIG. 6 shows a detail there of along line B-B.
  • a curtain of strands 23 as shown in the enlarged view, FIG. 7 is extruded through the extrusion die 22 of extruder 21 which is held by member 32 mounted on a height adjusting column 33. In this manner, the position of the die 22 over the consolidating rolls 11a, 12a can be easily controlled.
  • the extruder is also provided with hopper 34 into which the thermoplastic material can be introduced in its cheapest form, namely in the form of lumps or granules.
  • the continuously extruded strands 23 may be of any desired cross-section; the simplest cross-section, i.e. the round one as indicated in FIG. 7, is actually the preferred.
  • the laminating and consolidating rolls 11a, 12a are provided on their surfaces with a plurality of circumferential grooves and one or more strands 23 are introduced into each groove of said rolls, directly upon extrusion and while still in tacky condition, for compression and consolidation with staple fibers webs 24 which are also conveyed into said grooves from one or both sides by fiber web supply means 25 shown, in this case, schematically and in broken line as two superimposed rollers.
  • fiber web supply means 25 may, for example, be a drawing frame or any other device capable of producing a plurality of webs consisting of parallel or at random arranged staple fibers.
  • the rolls 11a, 12a may be driven at substantially higher speed than the extrusion rate of strands 23, thus producing stretching of said strands and increase in their strength due to the resultant molecular orientation of the polymer. It will usually be sufiicient to drive only roll 12a, for example, by motor 42 and belt 43, while roll Will be driven through sliding, due to its frictional engagement with roll 12a. Alternatively gear engagement can be utilized on both rolls 11a and 12a thus achieving a positive driving force on each roll.
  • the sliding roll 11a can be pressed with its grooved surface into the grooved surface of the driven roll 12a by means of an air cylinder 37 which is secured to frame 35 and which actuates bracket 39 that holds at both ends the axle of roll 11:!
  • the apparatus is then provided with heater 13 which is suitably mounted within the frame 35.
  • the heating surface of this heater has a plurality of gradually narrowing V grooves as shown in the enlarged cross-sectional view, FIG. 8 so that when the composite tapes 10, shown in the enlarged view, FIG. 9 after consolidation and lamination by rolls 11a, 12a, are guided within said grooves, they are not only heated to the desired temperature but also the staple fibers are further compacted and helically rearranged with the polymer material.
  • the grooves of the heater 13 as shown in the enlarged view, FIG.
  • the polymer material reaches such plastic condition that a twisting torque imparted from below by twister 16 will be melted-in and retained therein due to interslippage of the polymer molecules and of the staple fibers.
  • the staple fibers will be helically rearranged and better amalgamated with the polymer due to the prevailing conditions of twisting arld polymer plasticity, thus resulting in utilization of the staple fiber strength in twisted structure form towards the toal yarn strength.
  • Efficiency of fiber strength to yarn strength conversion generally no more than 50% in conventional staple fiber spun yarns, is considerably increased by the binding according to this invention of the staple fibers to a thermoplastic polymer substrate thus arresting their slippage in the axial direction in the final composite yarn.
  • a fibrous tape which has a tenacity of about 4 g./tex. can by applicants new method be converted into a yarn of about 12 g./tex. tenacity.
  • the composite material Upon its exit from heater 13-, in twisted condition as shown in the enlarged view, FIG. 11, the composite material will be cooled in an air feeding and cooling injector 36 whereby the twist in the polymer becomes permanently coagulated. Twisted yarn is thus obtained and after passing through the torque imparting device 16 and tensioning rolls 17, 18, as well as a conventional guiding arrangement 41, it is linearly wound on collecting roll 19 at speeds that may reach and even exceed one thousand feet per minute, to form the final spun yarn package 20.
  • the twist is therefore imparted according to the present invention and according to the embodiment illustrated in these figures between two fixed pinch points, in this case between rolls 11a, 12a and rolls 17, 18, in a totally continuous linear operation with quality spun yarn being produced 'at considerably higher speeds than those of hitherto known systems.
  • thermoplastic polymer for example of the group of polyamides, polyolefins, acrylics and the like, can be introduced into the hopper 34 in granular form and extruded at a rate of about one hundred feet per minute through extruder die 22 in the form of a curtain of strands 23 of round or any other preferred cross-section.
  • the strands are extruded toward the nip of circumferentially grooved laminating and consolidating rolls 11a, 1211 which can be driven at a speed of-about one thousand feet per minute, thus with a ratio of about 10 to 1 relative to the speed of extrusion. A substantial molecular orientation of strands 22 will thus be achieved.
  • composite tapes 10 having, for example, a fiber-polymer ratio of :50.
  • Other ratios of fiber-polymer can, of course, also be used.
  • the composite tapes are then guided through heater 13 provided with fiber-restrictive grooves or zones and an adequately controlled temperature and wherein the polymer substrate of said tapes reaches a plastic, lubricating condition which makes it possible to impart to said tapes, from below, a predetermined twist by twister 16 which may run at speeds of up to 500,000 r.p.m.
  • the twisted yarn, coming out of the heater, is cooled to coagulate and permanently retain to a substantial degree the imparted twist. Therefore, upon linearly passing through a pair of tensioning rolls 17, 18, which may be driven at a higher speed than that of rolls 11a, 12a so as to elfect further stretching and orientation of the polymer (thus achieving even further increase in the strength of the final yarn), the obtained spun yarn is continuously and linearly wound on collecting roll 19 to form a commercially acceptable spun yarn package 20.
  • Means 50 may be provided for automatic replacement of collecting roll 19 when filled by an empty roll, as shown, for example, in US. Pats. 2,663,507 and 3,345,003.
  • Method of making fibrous spun yarns of composite staple fiber-thermoplastic polymer material comprising: linearly supplying through feed-in rolls a continuous strand or tape of substantially consolidated composite fibrous material consisting of staple fibers and a thermoplastic polymer substrate; heating said strand or tape Within a fiber restrictive zone to a point where the polymer substrate of said composite material becomes plastic without reaching the melting point of said polymer; subjecting said strand or tape within said fiber restrictive Zone to a twisting torque for imparting thereto, while the polymer substrate is in plastic condition, a predetermined twist with consequent helical rearrangement of the fibers; cooling to coagulate the polymer while the strand or tape is in twisted condition; and linearly winding-up the obtained consolidated spun yarn on a collecting roll; said feed-in rolls and said collecting roll constituting two fixed pinch points between which the twist is applied and substantially retained.
  • Method of producing composite staple fiber-thermoplastic polymer spun yarn in a continuous linear sequence of operations comprising: extruding a curtain of thermoplastic polymer strands downwardly from an extruder die and toward the nip of a pair of circumferentially grooved consolidating rolls positioned side by side so that male members of the grooved surface of one roll enter and press into female members of the other roll, said curtain being directed so that at least one strand enters into each consolidating groove of said rolls; rotating said rolls at a greater speed than the rate of extrusion of the polymer strands so as to stretch the latter and achieve molecular orientation of the extruded polymer strands; simultaneously forwarding from at least one side of the polymer curtain and into the nip of said rolls a plurality of staple fiber webs, one into each consolidating groove of the rolls; laminating and consolidating said strands with said webs by pressure within the grooves of said rolls and cooling to form a plurality of laminated staple fiber-thermoplastic polymer composite fibrous tape
  • Method of producing composite staple fiber-thermoplastic polymer spun yarn in a continuous linear sequence of operations comprising: extruding a curtain of thermoplastic polymer strands; stretching said strands to achieve a predetermined orientation of the polymer molecules; passing the so oriented strands in a heater in which the temperature is so adjusted and controlled as to render the strands tacky on the surface while substantially retaining their previously acquired molecular orientation; introducing the tacky strands into the nip of a pair of circumferentially grooved consolidating rolls positioned side by side so that the male members of the grooved surface of one roll enter and press into female members of the other roll, said strands being directed so that at least one strand enters into each consolidating groove of said rolls; simultaneously forwarding from at least one side of the polymer curtain and into the nip of said rolls a plurality of staple fiber webs, one into each consolidating groove of the rolls; laminating and consolidating said strands with said webs by pressure within the grooves of said rolls and cooling to
  • Apparatus for producing composite staple fiberthermoplastic polymer spun yarn comprising:
  • Apparatus according to claim 5 further comprising means for forming a plurality of said continuous strands or tapes of substantially consolidated staple fiberthermoplastic polymer composite material.
  • said means for forming a plurality of said continuous composite strands or tapes comprise: an extruder with an extruder die having a plurality of orifices alined in a substantially straight line and adapted to extrude a curtain of polymer strands; a pair of circumferentially grooved consolidating rolls positioned side by side below said extruder die and so that male members of the grooved surface of one roll enter and press into female members of the other roll, the rolls being so arranged that at least one polymer strand extruded through the extruder die enters into each consolidating groove thereof; means for rotating said consolidating rolls at a greater speed than the rate of extrusion of the polymer strands from the extruder die; means for simultaneously conveying from at least one side of the extruded curtain of polymer strands and into the nip of said consolidating rolls a plurality of staple fiber webs, one into each consolidating groove of the rolls; and means for cooling the material during
  • said means for forming a plurality of said continuous strands or tapes comprise: an extruder with an extruder die having a plurality of orifices aligned in a substantially straight line and adapted to extrude a curtain of polymer strands; means for stretching said polymer strands to achieve a predetermined orientation of the polymer molecules; a heater with temperature control means for passing the so oriented polymer strands therein to render them tacky on the surface while substantially retaining their previously acquired molecular orientation; a pair of circumferentially grooved consolidating rolls, following said heater, positioned side by side so that male members of the grooved surface of one roll enter and press into female members of the other roll, said rolls being positioned so that at least one polymer strand coming out of the heater enters into each consolidating groove thereof; means for simultaneously forwarding on at least one side of the curtain of the polymer strands and into the nip of said consolidating rolls a plurality of staple fiber webs,
  • Apparatus according to claim 5 in which the heater has a heating fiber restrictive zone in a V-grooved form, there being as many grooves of V cross-section as there are strands or tapes to be heat treated.
  • Cooling means provided between the heater and the twisting device consist of a compressed air injector.
  • Apparatus according to claim 13 in which there is further provided a pair of tensioning rolls positioned between the twist imparting device and the collecting roll and adapted to be driven at higher speed than that of the feed-in rolls.
  • Apparatus according to claim 5, in which the means for linearly winding-up the obtained spun yarn comprise 13 14 a yarn guiding member and a device for automatic re- 3,154,908 11/1964 Cilker et a1. 5735 placement of the collecting rolls. 3,279,161 10/ 1966 Chisholm et a1 5735 References Cited STANLEY N. GILREATH, Primary Examiner 2,743,572 5/1956 I-I-iensch 5734 US. Cl. X.R.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US778714A 1968-10-02 1968-11-25 Method and apparatus for ringless spinning of fiber-polymer yarns Expired - Lifetime US3548581A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3812901A (en) * 1973-01-30 1974-05-28 Battelle Development Corp Method of producing continuous filaments using a rotating heat-extracting member
US3844097A (en) * 1971-08-26 1974-10-29 E Bobkowicz Composite spinning
USB294103I5 (forum.php) * 1972-07-06 1975-01-28
US3959055A (en) * 1973-10-23 1976-05-25 The Bobtex Corporation Limited Textile apparatus and process
US3983202A (en) * 1969-06-26 1976-09-28 Shell Oil Company Manufacture of synthetic fibers and yarns
US4633662A (en) * 1984-09-28 1987-01-06 Mitsubishi Rayon Company Ltd. Method for producing flat yarn
US5382153A (en) * 1990-08-25 1995-01-17 Hoechst Aktiengesellschaft Apparatus for producing filling material for three-dimensionally shaped textile structures
US10232562B1 (en) 2015-05-21 2019-03-19 Richard F. Langner Methods and apparatus for making a fabric that includes a thermoplastic

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2743572A (en) * 1951-09-11 1956-05-01 Textile Machinery Corp Textile yarn producing apparatus
US2773297A (en) * 1951-08-30 1956-12-11 Louis M Cotchett Process and apparatus for making yarn and fabric
US3154908A (en) * 1961-07-10 1964-11-03 Fmc Corp Apparatus for treating glass roving
US3279161A (en) * 1964-02-05 1966-10-18 Dow Chemical Co Method and apparatus for coating strandular material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2773297A (en) * 1951-08-30 1956-12-11 Louis M Cotchett Process and apparatus for making yarn and fabric
US2743572A (en) * 1951-09-11 1956-05-01 Textile Machinery Corp Textile yarn producing apparatus
US3154908A (en) * 1961-07-10 1964-11-03 Fmc Corp Apparatus for treating glass roving
US3279161A (en) * 1964-02-05 1966-10-18 Dow Chemical Co Method and apparatus for coating strandular material

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983202A (en) * 1969-06-26 1976-09-28 Shell Oil Company Manufacture of synthetic fibers and yarns
US3844097A (en) * 1971-08-26 1974-10-29 E Bobkowicz Composite spinning
USB294103I5 (forum.php) * 1972-07-06 1975-01-28
US3924396A (en) * 1972-07-06 1975-12-09 Bobkowicz E Composite yarn forming method and apparatus
US3812901A (en) * 1973-01-30 1974-05-28 Battelle Development Corp Method of producing continuous filaments using a rotating heat-extracting member
US3959055A (en) * 1973-10-23 1976-05-25 The Bobtex Corporation Limited Textile apparatus and process
US4633662A (en) * 1984-09-28 1987-01-06 Mitsubishi Rayon Company Ltd. Method for producing flat yarn
US4689944A (en) * 1984-09-28 1987-09-01 Mitsubishi Rayon Company Ltd. Flat yarn and method for producing the same
US5382153A (en) * 1990-08-25 1995-01-17 Hoechst Aktiengesellschaft Apparatus for producing filling material for three-dimensionally shaped textile structures
US10232562B1 (en) 2015-05-21 2019-03-19 Richard F. Langner Methods and apparatus for making a fabric that includes a thermoplastic

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PL71388B1 (forum.php) 1974-06-29
ES367780A1 (es) 1971-04-16
DE1947311A1 (de) 1970-04-16
CH533702A (fr) 1972-09-29
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BR6911599D0 (pt) 1973-01-09
CH1196769A4 (forum.php) 1972-09-29
GB1279456A (en) 1972-06-28
NL148661B (nl) 1976-02-16
NL6913593A (forum.php) 1970-04-06
FR2019636A1 (forum.php) 1970-07-03
DE1947311C3 (de) 1974-10-17
IL32557A0 (en) 1969-09-25
BE738932A (forum.php) 1970-03-02
AT323611B (de) 1975-07-25
DE1947311B2 (de) 1974-02-28
JPS496492B1 (forum.php) 1974-02-14

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