US3341913A - Drawing and bulking of synthetic polymer yarns - Google Patents

Drawing and bulking of synthetic polymer yarns Download PDF

Info

Publication number
US3341913A
US3341913A US411996A US41199664A US3341913A US 3341913 A US3341913 A US 3341913A US 411996 A US411996 A US 411996A US 41199664 A US41199664 A US 41199664A US 3341913 A US3341913 A US 3341913A
Authority
US
United States
Prior art keywords
yarn
bulking
yarns
roll
rolls
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
US411996A
Other languages
English (en)
Inventor
Jenkins Donald Glyn
Parikh Anil Chandrakant
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.)
British Nylon Spinners Ltd
Original Assignee
British Nylon Spinners Ltd
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
Priority claimed from GB4556063A external-priority patent/GB1085239A/en
Application filed by British Nylon Spinners Ltd filed Critical British Nylon Spinners Ltd
Application granted granted Critical
Publication of US3341913A publication Critical patent/US3341913A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
    • D02G1/0213—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting after drawing the yarn on the same machine
    • 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
    • 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
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • 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
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/229—Relaxing

Definitions

  • a better bulked yarn may be made more economically by first drawing undrawn yarn at bulking than can be made by bulking a yarn whilst drawing it.
  • Our invention is concerned specifically with both drawing undrawn yarn, and then bulking it, on e.g. a stuiferbox crimping machine.
  • a stuiferbox crimping machine Such a process, to be defined hereinafter, not only has economic and technical usefulness of its own, but it enables a novel type of bulked yarn to be made, such being the subject of an application U.S. Serial No. 412,248, filed on even date hereto.
  • undrawn yarn of a drawable synthetic polymer material is forwarded by feed means at a predetermined rate to a drawing zone, the yarn is drawn in said zone by drawing means operating at a drawing rate at least twice that of said predetermined rate, the drawn yarn is forwarded from said drawing means substantially at said drawing rate and at a low degree of mechanical overfeed, i.e. not greater than about 20%, to a bulking mechanism, and the drawn yarn is then bulked thereby.
  • the feed means and the drawing means comprise roll assemblies; and preferably the drawing is located at a snubbing-pin positioned in the drawing zone, where heat may optionally be applied to the yarn to assist drawing.
  • the feed means may com- 31 ,341,913 Patented Sept. 19, 1967 prise nip rolls positioned to act on the yarn upstream of an accompanying feed-roll assembly, the purpose of the nip rolls being to avoid tension non-uniformities in the yarn at the feed roll assembly.
  • a minor (e.g. 0.1% to 10%) degree of drawing may take place between the nip rolls and the feed roll assembly.
  • mechanical overfeed we mean that the speed ratio of the respective rolls is such as to bring about an overfeed of the amount specified, although the freshly-drawn yarn itself will on account of its nature, contract lengthwise by an equal amount.
  • the subsequent bulking stage may comprise, for instance, one of those kinds of false twist crimping process that depend on positive feed, air jet bulking, or stutterbox crimping.
  • the tension in that yarn as supplied from the draw rolls to the subsequent processing stage shall be accurately controlled, preferably at a low value.
  • the nature of the freshly-drawn yarn as for instance that of nylon, is such as to accommodate for any small discrepancy in the matching of the speed of the draw roll with that of the roll or rolls employed in the subsequent processing stage.
  • a novel yarn of the stutter-box type described in our application U.S. Serial No. 412,248 of even date hereto, is characterised by an increased bulk, an improved degree of set crimp and an enhanced uniformity of crimp along the yarn, compared with bulked yarns of the stutter-box type produced heretofore.
  • the above properties arise from the propinquity of the drawing and bulking steps, and the measure of control afforded by the process particularly in regard to the tension and temperature of the yarn, as well as to its state of molecular order, at the instant of crimping.
  • the overfeed of yarn from the drawing means is necessary in order to control the tension, and particularly to avoid a high tension, in the yarn at the instant of crimping.
  • Control of the tension will, inter alia, control the temperature to which the yarn is heated at the instant of crimping in a stutter-box, and such is important owing to the eifect of temperature on crimp frequency: the higher the temperature, the higher the crimp frequency.
  • the tension in the running yarn is the result of the establishment of equilibrium conditions between the linear contraction that takes place in the yarn immediately on release from the drawing tension and the linear relaxa- ICC tion afforded to it by the circumstance of the mechanical overfeed.
  • Such tension, and the freshly-drawn state of the yarn, are responsible for the enhanced crimping propensity of the yarn, according to the invention.
  • Such enhanced propensity to crimp in the particular case of stutter-box crimping, is, it is thought, the cause of a narrower column of crimped yarn being formed according to the invention for a given crimping pressure, compared with that formed in ordinary stuffer-box crimping.
  • a narrower column of crimped yarn within a stutterbox of given internal dimensions will tend to collapse more frequently than a column of ordinary width filling the box. Frequent collapses of the column in irregular directions give rise to rapid local pressure fluctuations just below the nip of the rolls, at that point where the nature of the crimp in the filaments is determined.
  • the yarn at that point is folded to-and-fro in the plane parallel to the axes of the nip rolls, only fractionally later, as the lateral boundaries of the crimping chamber, being the peripheries of the rolls, separate from one another, re-orienting to form a column of crimped yarn having a folded lay that is in the plane perpendicular to the axes of the rolls.
  • the degree of irregularity is a function of the degree of overfeed and also of the crimping load set for the stutter-box.
  • a high crimping load e.g. 4-6 lb. will, due to the enhanced propensity to crimp of the freshly-drawn, lowtensioned yarn, tend to over-crimp the yarn, i.e. the crimp will be of higher frequency and of greater regularity than usual, leading to too compact a bulked yarn for some purposes.
  • the draw roll In the case of a subsequent positive-feed false twist crimping stage, the draw roll combines that function with the one of positive overfeed into the twisting (and setting) zone, say, by some 7%15% overall.
  • the effect of false twist crimping freshly-drawn, overfed yarn is to enable crimped yarn of the required properties to be obtained at a greater throughput than when ordinary drawn yarn is used as the supply (at a considerably lower degree of overfeed).
  • crimped multifilament yarn of polyhexamethylene adipamide, having a drawn denier of 70 can be produced 50% faster if drawing at a draw ratio of 3.18 takes place immediately prior to false twist crimping by a conventional false-twist spindle with allied heater and the drawn yarn is overfed to the twisting zone by the draw roll at an overfeed of 13 /2%, compared with an overfeed of 2.7% normally employed when crimping drawn yarn.
  • the essential characteristics of the crimped yarn, for instance its crimp rigidity, are unimpaired by the higher speed, whereas those of yarn ordinarily drawn for use as a drawn supply yarn on package are reduced below an acceptable value when crimped at the abovementioned overfeed of 2.7% at such higher speed.
  • An optional feature of the invention is the inclusion of air-jet means to act on the low tension span of yarn between the supply cakes and the feed rolls of the drawing means or on the low tension span between the drawing means and the bulking mechanism, to effect some intermingling of the filaments of a single yarn, or of all the filaments of a plurality of such yarns and hence to compact such yarns into a uniform entity, prior to bulking.
  • such as air-jet means can be positioned downstream of the bulking mechanism for the same function, together with the function of cooling the filaments after bulking, and before wind-up.
  • FIGURE 1 is a line diagram of the yarn path and the drawing and bulking instrumentalities in the invention, in respect of a stutter-box bulking mechanism;
  • FIGURE 2 is a view at to that of FIGURE 1, in respect of part of the diagram;
  • FIGURE 3 is a line diagram of the yarn path and the drawing and bulking instrumentalities in the invention, in respect of a false twist bulking mechanism.
  • FIGURES 1 and 2 show the general arrangement of a process according to the invention in which undrawn yarn is withdrawn from a package, drawn, bulked in a stufferbox and finally wound up.
  • Undrawn yarn Y is withdrawn over the end of package 1 on spinning cylinder 3, passing through thread-guide 5 on the axis of cylinder 3, by the forwarding action of driven roll 7 and its complementary pivoted nip roll 9.
  • the yarn passes around the periphery of nip roll 9 from thread-guide 11 and thence passes through the nip of nip roll 9 and the roll 7.
  • the yarn passes into the drawing stage.
  • This stage comprises feed roll 13 with its separator roll 15, and draw roll 17 with its separator roll 19. Between the feed roll and the draw roll, the yarn is wrapped around non-rotatable snubbing-pin 21, by which the point of draw is located.
  • the feed to the stutter-box comprises feed roll 23, which is peripherally driven by the periphery of crimper roll 25.
  • Feed roll 23 is pivotally mounted on arm 27. After passing through the nip of rolls 23 and 25, the yarn passes in contact with the periphery of crimper roll 25 down through the nip between that roll and corresponding crimper roll 29.
  • the side walls 31 and 33 of the stutter-box are shown in FIGURE 2, as are the thin extensions, 35, 37 thereof.
  • the setting chamber is flexibly mounted on steel spring cantilevers 43, 45 for limited movement in its lengthwise direction relative to the stutter-box, and movements of the setting chamber are utilised as the means for controlling the tension of the yarn withdrawn from the chamber.
  • the manner of control of the stutfer-box bulking operation is not of the essence of this invention, but it will be described in some further detail to complete the description of the total operation of this one embodiment of the invention.
  • the setting chamber is loaded by weight 47 to provide the required back pressure for crimping, the emergence of the yarnfrom its discharge end being impeded by a set restriction of that end so that the load applied to the setting chamber shall be effective.
  • Weight 47 comprises both counterbalance and crimping pressure loads, and is suspended on strand 49 which passes around pulley wheel 51.
  • the discharge end of the setting chamber is restricted to a certain extent in the front-to-back plane of the chamber by flap 53, which is fixed in the set position by adjustment of screw 55.
  • Microswitch 57 is adapted to operate, on small vertical movements of the setting chamber, so as to influence the electrical control circuit of the variable tensioning device to be described.
  • the cn'mped yarn on emergence from the setting chamber, is first passed around tensioning bar 59 by which a low tension is applied to straighten the filaments somewhat and to remove any tangles. Next, it is passed around a portion of the periphery of magnetic particle brake 61 by which it is tensioned to the desired variable degree.
  • the crirnped yarn is wound up in package 63 on wind-up roll 65 which is peripherally driven by drive roll 67, the yarn being traversed by reciprocating traverse guide 69 after passage through thread-guide 71.
  • the electrical circuit by which the variable tensioning device 61 is controlled, dependent on the level of yarn in the setting chamber, comprises the supply points 73 for alternating current from the mains.
  • the current is fed to the primary coil of a two-tap transformer 75, between whose two tappings the micro-switch 57 selects. Whichever of the two output voltages is selected is rectified in rectifier circuit 77, and the direct current output at that voltage is fed to the variable tensioning device, magnetic particle brake 61.
  • the undrawn yarn is withdrawn from its package by the nip rolls, stretched very slightly between the nip rolls and the feed roll (say by between 0.1% and drawn between the feed roll and the draw roll by stretching at least 200%, and probably between 300% and 400%.
  • the snubbing pin is usually unheated.
  • the drawn yarn is overfed to the stutter-box at a small degree of mechanical overfeed, usually less than 10%, fixed by selection of the relative speeds of the draw roll and of the crimper rolls of the stufier-box.
  • the drawn yarn still under the immediate after-effects of the action of drawing, is immediately bulked by the crimping action of the stuflYerbox, and the bulking is of a permanent nature without, normally, any need for additional heating of the setting chamber.
  • the yarn is then wound up in the usual way, as already described.
  • FIGURE 3 shows the general arrangement of a process according to the invention in which undrawn yarn is withdrawn from a package, drawn, bulked by a false twist bulking mechanism and wound up.
  • Undrawn yarns Y and- Y are withdrawn from supply packages (not shown) by feed roll assembly 79, comprising nip rolls 81 and separator roll 83 from which they pass into the drawing stage. Drawing takes place between the feed roll assembly and a draw roll assembly 85, comprising nip rolls 87 and separator roll 89, the point of draw being located by non-rotatable snubbing pin 91 around which the yarns are wrapped with one complete turn.
  • the drawn yarns now pass to the bulking stage consisting of false twisting and heat setting means.
  • the yarn paths are separated from one another by thread guides 93, 95; and the separated yarns are then passed through electrical contact heater 97.
  • the yarns proceed to two contra-rotating friction false-twisting tubes 98, 99 which impart false twist to the yarns in opposite directions, the twists running back in the yarns, through the heat-setting zone, to the nip of the draw roll assembly.
  • the twists are then set on the upstream side of the twist-tubes; and the yarns are de-twisted immediately on leaving the tubes.
  • the false-twisted, latently-bulked yarns are then led separately over grooves in a freely-rotatable guide roller 101, and are withdrawn from the bulking zone by the take-01f roll assembly 103, comprising driven roll and its separator roll 107.
  • the yarns are then passed to a wind-up assembly (not shown).
  • the undrawn yarns are withdrawn from their packages by the feed roll assembly, and then drawn between that assembly and the draw roll assembly by being stretched some 200%-400%.
  • the drawn yarns are overfed to the false twist bulking stage, the overfeed being arranged by the lower peripheral speed of the take-off roll assembly compared with that of the draw roll assembly, itself functioning additionally as the positive feed for the fase twist bulking mechanism.
  • the extent of overfeed between the draw-roll assembly and the false twist tubes themselves will generally be different from that between the two sets of rolls, owing to the tension imparted by the false twist tubes, Whether such be of the friction variety shown or of the conventional type.
  • the false twist imparted runs back to the nip of the draw roll assembly and is set into the yarns by the contact heater, which is heated to, say, 230 C. for nylon 66 yarns.
  • Nip rolls are required for the draw roll assembly to snub the false twist and prevent it running back to the separator roll, where its presence otherwise would cause the yarns to collide.
  • the two oppositely-twisted, bulked yarns are positively forwarded to a wind-up, where the yarns are either plied or wound-up separately.
  • a degree of overfeed, to allow some contraction of the yarns before wind-up, is normally afiorded.
  • three supply yarns each of 3600 denier/68 filament undrawn polyhexamethylene adipamide (as spun) were withdrawn over-end from their spinningcylinder packages mounted on a creel, withdrawal being eifected by the feed rolls of a yarn-drawing stage.
  • the yarns were led together at the feed rolls, and from them they were passed together with one or more wraps around a stationary, unheated snubbing-pin and thence to draw rolls by which they were drawn at a draw ratio of 3.7.
  • the overfeed was measured and maintained between the draw rolls (acting as feed rolls for the false twist bulkingstage) and the take-01f rolls.
  • each yarn separately was led through a friction false twist tube, 80 turns per inch S twist being inserted in one yarn, and 80 turns per inch Z twist being inserted in the other, between the tubes and the draw roll.
  • the thustwisted yarns were led in contact with a heated metal plate positioned upstream of the tubes at a temperature of 230 C.
  • the yarn speed at the take-01f rolls was 400 feet/minute.
  • the yarns were wound-up together on a ring-spindle wind-up.
  • the yarns had a crimp rigidity of 41, and an equivalent steam setting temperature (E.S.S.T.) of 111.
  • nylon is the only synthetic polymer material instanced above, it is to be understood that the invention is applicable to all such materials in yarn form which are drawable and retract somewhat immediately after relese from the drawing tension.
  • a process for drawing and bulking drawable synthetic polymer yarns comprising the steps of (a) forwarding undrawn yarn of a drawable synthetic polymer material by feed means at a predetermined rate to a drawing zone;
  • a process for drawing and bulking a nylon continuous filament yarn comprising the steps of (a) withdrawing an undrawn nylon continuous filament yarn from a supply package thereof by nip rolls;

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Indole Compounds (AREA)
US411996A 1963-11-19 1964-11-18 Drawing and bulking of synthetic polymer yarns Expired - Lifetime US3341913A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4556063A GB1085239A (en) 1963-11-19 1963-11-19 Improvements in or relating to the drawing and bulking of synthetic polymer yarns
GB2288664 1964-06-03

Publications (1)

Publication Number Publication Date
US3341913A true US3341913A (en) 1967-09-19

Family

ID=26256165

Family Applications (1)

Application Number Title Priority Date Filing Date
US411996A Expired - Lifetime US3341913A (en) 1963-11-19 1964-11-18 Drawing and bulking of synthetic polymer yarns

Country Status (11)

Country Link
US (1) US3341913A (fi)
AT (1) AT259750B (fi)
BE (1) BE655877A (fi)
CH (1) CH432714A (fi)
DE (1) DE1435370C3 (fi)
FI (1) FI42853C (fi)
FR (1) FR1418399A (fi)
GB (1) GB1085240A (fi)
LU (1) LU47380A1 (fi)
NL (1) NL146889B (fi)
NO (1) NO118762B (fi)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500518A (en) * 1967-12-05 1970-03-17 Techniservice Corp Strand treatment method and apparatus
US3902231A (en) * 1970-12-07 1975-09-02 Bancroft & Sons Co J Method and apparatus for drawing and crimping yarn
US3965548A (en) * 1975-01-31 1976-06-29 E. I. Du Pont De Nemours And Company Crimper startup method and system
DE2733455A1 (de) * 1977-07-25 1979-02-08 Barmag Barmer Maschf Stauchkammer-texturierverfahren
CN1804170B (zh) * 2005-01-14 2011-04-06 香港理工大学 低扭单股环锭纱线的加工方法与设备
CN102776630A (zh) * 2012-08-17 2012-11-14 浙江耐隆纤维有限公司 一种高强低弹零收缩环保型加弹钻石纤维的生产方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE392299B (sv) * 1971-08-24 1977-03-21 Du Pont Forfarande och medel for framstellning av garn med dragen och snodd textur
DE58904115D1 (de) * 1988-06-10 1993-05-27 Schweizerische Viscose Verfahren zur herstellung eines hochfesten nylontexturgarnes, garn hergestellt nach dem verfahren sowie dessen verwendung.
EP2792772B1 (fr) * 2013-04-18 2016-09-07 SUPERBA (Société par Actions Simplifiée) Dispositif d'alimentation de boîte à friser avec rouleau d'entrée

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2500690A (en) * 1945-11-21 1950-03-14 Owens Corning Fiberglass Corp Apparatus for making fibrous products
US2686339A (en) * 1950-10-04 1954-08-17 Chemstrand Corp Treatiment of acrylonitrile polymer fibers
US2852906A (en) * 1951-12-14 1958-09-23 Du Pont Method and apparatus for producing bulky continuous filament yarn
US3024516A (en) * 1959-05-18 1962-03-13 Chemstrand Corp Apparatus for treating filament yarn
US3046633A (en) * 1959-03-16 1962-07-31 Chori Co Ltd Apparatus for producing crimped thermoplastic synthetic yarns
US3099064A (en) * 1961-04-13 1963-07-30 Eastman Kodak Co Method and apparatus for making rug yarn
CA679584A (en) * 1964-02-04 Iwnicki Kurt Crimping of yarn
US3137119A (en) * 1961-06-14 1964-06-16 Chavanoz Moulinage Retorderie Process for the production of high bulk yarns
US3154835A (en) * 1962-04-10 1964-11-03 Monsanto Co Apparatus and method for yarn texturizing

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA679584A (en) * 1964-02-04 Iwnicki Kurt Crimping of yarn
US2500690A (en) * 1945-11-21 1950-03-14 Owens Corning Fiberglass Corp Apparatus for making fibrous products
US2686339A (en) * 1950-10-04 1954-08-17 Chemstrand Corp Treatiment of acrylonitrile polymer fibers
US2852906A (en) * 1951-12-14 1958-09-23 Du Pont Method and apparatus for producing bulky continuous filament yarn
US3046633A (en) * 1959-03-16 1962-07-31 Chori Co Ltd Apparatus for producing crimped thermoplastic synthetic yarns
US3024516A (en) * 1959-05-18 1962-03-13 Chemstrand Corp Apparatus for treating filament yarn
US3099064A (en) * 1961-04-13 1963-07-30 Eastman Kodak Co Method and apparatus for making rug yarn
US3137119A (en) * 1961-06-14 1964-06-16 Chavanoz Moulinage Retorderie Process for the production of high bulk yarns
US3154835A (en) * 1962-04-10 1964-11-03 Monsanto Co Apparatus and method for yarn texturizing

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500518A (en) * 1967-12-05 1970-03-17 Techniservice Corp Strand treatment method and apparatus
US3902231A (en) * 1970-12-07 1975-09-02 Bancroft & Sons Co J Method and apparatus for drawing and crimping yarn
US3965548A (en) * 1975-01-31 1976-06-29 E. I. Du Pont De Nemours And Company Crimper startup method and system
DE2733455A1 (de) * 1977-07-25 1979-02-08 Barmag Barmer Maschf Stauchkammer-texturierverfahren
CN1804170B (zh) * 2005-01-14 2011-04-06 香港理工大学 低扭单股环锭纱线的加工方法与设备
CN102776630A (zh) * 2012-08-17 2012-11-14 浙江耐隆纤维有限公司 一种高强低弹零收缩环保型加弹钻石纤维的生产方法
CN102776630B (zh) * 2012-08-17 2014-11-26 浙江耐隆纤维有限公司 一种高强低弹零收缩环保型加弹钻石纤维的生产方法

Also Published As

Publication number Publication date
DE1435370C3 (de) 1978-07-06
FI42853C (fi) 1970-11-10
FR1418399A (fr) 1965-11-19
GB1085240A (en) 1967-09-27
NL146889B (nl) 1975-08-15
NL6413484A (fi) 1965-05-20
AT259750B (de) 1968-01-25
BE655877A (fi) 1965-05-17
NO118762B (fi) 1970-02-09
CH432714A (de) 1967-03-31
DE1435370A1 (de) 1969-05-08
LU47380A1 (fi) 1965-01-19
FI42853B (fi) 1970-08-03
DE1435370B2 (de) 1977-10-20

Similar Documents

Publication Publication Date Title
US3763640A (en) Production of a composite thread
US2881504A (en) Process for crimping textile threads
US3404525A (en) Low-torque multifilament compact yarn
US4033103A (en) Process and apparatus for producing a variable diameter alternate twist yarn
US3112600A (en) Method and apparatus for processing yarns
US3341913A (en) Drawing and bulking of synthetic polymer yarns
US3376698A (en) Production of stretch or bulked textile yarns
US2999351A (en) Bulky yarn
US4103481A (en) Variable diameter yarn
US4338776A (en) Process for the production of a crimped continuous multifilament yarn
US3177556A (en) Drawing and crimping of synthetic filaments and yarns
US3733801A (en) Yarn process
US3474612A (en) Drawing and bulking of synthetic polymer
US3720984A (en) Multi-end knit-deknit process
US3445996A (en) Preheating in yarn texturing
US3785135A (en) Producing torque controlled voluminous set yarns
US3311961A (en) Process for treating filamentary material
US3184820A (en) Apparatus for orienting the structure of synthetic yarn
CA1055239A (en) Multipurpose intermingling jet and process
US3932986A (en) Method for manufacturing a textured synthetic multifilament yarn having alternately grouped S and Z twists
US3330104A (en) False twist spindle with auxiliary reverse-twist element
US3318083A (en) Process for false twist-crimping yarn
US3234626A (en) Apparatus for hot and cold crimping of textile filaments
IE41990B1 (en) A process for texturing thermoplastic synthetic yarns
US3553803A (en) Process and device for crimping and heat-setting of yarns made from synthetic linear high polymers