US3509709A - Pneumatically bundled yarn - Google Patents

Pneumatically bundled yarn Download PDF

Info

Publication number
US3509709A
US3509709A US734400A US3509709DA US3509709A US 3509709 A US3509709 A US 3509709A US 734400 A US734400 A US 734400A US 3509709D A US3509709D A US 3509709DA US 3509709 A US3509709 A US 3509709A
Authority
US
United States
Prior art keywords
yarn
filaments
twist
fluid
pneumatically
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
US734400A
Other languages
English (en)
Inventor
Motohiro Tsuruta
Hiroshiro Kimura
Akio Koshimo
Nobuhiro Kobayashi
Matafumi Ishibashi
Yoshinori Mineda
Katsumi Yasuzuka
Kentaro Kamamoto
Takaaki Matsuo
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.)
Nippon Rayon Co Ltd
Original Assignee
Nippon Rayon Co 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
Application filed by Nippon Rayon Co Ltd filed Critical Nippon Rayon Co Ltd
Application granted granted Critical
Publication of US3509709A publication Critical patent/US3509709A/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
    • 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
    • D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
    • D02G3/28—Doubled, plied, or cabled threads
    • D02G3/286—Doubled, plied, or cabled threads with alternatively "S" and "Z" direction of twist, e.g. Self-twist process
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means

Definitions

  • the present invention relates to pneumatically bundled yarn having good running and handling properties, having substantially no twist as a whole, and being composed of at least 3 monofilaments forming a plurality of repetitive units.
  • Each unit includes 2 sections entwisted in the opposite directions and a no-twist section located between them, each twisted section including a plurality of subsections formed by entwisting one or more monofilaments with random others, and further relates to a process and apparatus for producing the same wherein at least 3 monofilaments are passed a steady fluid stream flowing in the vortex.
  • the present invention relates to yarn. More particularly, the present invention relates to pneumatically bundled yarn.
  • the pneumatically bundled yarn obtained by the process of the present invention has good cohesion properties and beautiful appearance, and moreover can be treated advantageously with ease equal or superior to that of the conventional true twist yarn in various textile operations.
  • textile yarn is truely twisted and sometimes further sized as well so as to improve the running and handling properties. If yarn having suflicient handling and running properties could be obtained with out necessitating a true twist operation, readily apparent advantages would thereby be realized. It is therefore desired to obtain a coherent yarn bundle without true twisting so as to give good running and handling properties.
  • filaments composing a multifilamentary yarn are bundled with each other in extremel irregular state by passing through a vortex or turbulent stream of the fluid jet.
  • the yarn thus obtained has however disadvantages, such as poor uniformity, inferior appearance, and liability to separation of filaments when compared with conventional true twist yarn because of the use of the irregular vortex or turbulent fluid stream. Additionally, the yarn obtained is liable to take at least a partly ribbon-like form. These defects can give rise to deteriorated commercial value.
  • the yarn is composed of at least 3 monofilaments
  • the yarn is formed by a plurality of repetitive units, each of which includes a S-twisted section, a Z-twiste-d section and a no-twist section located between them, but has as a whole substantially no twist,
  • the twisted sections include respectively at least one subsection composed of at least two monofilaments twisted in the same direction as that of the twisted section,
  • One or more monofilaments are at least partly entwisted with one or more other random monofilaments so as to form the said subsection.
  • the term having substantially 11o twist means that having twists of no more than about 50 turns per meter. Numbers of twists as such are considered in various textile operations as substantially no twist.
  • the term repetitive units does not mean that each and all units have a substantially similar construction regarding, for example, numbers of twists, dimensional values, etc., but means only that each unit includes similarly three sections, i.e., two sections twisted in opposite directions respectively and one section having no twist.
  • FIG. 1 schematically illustrates a side view of a preferred embodiment of the yarn of the present invention
  • FIG. 2 shows a perspective view of an embodiment of the apparatus according to the present invention
  • FIG. 3 shows a cross sectional view of the body portion of the apparatus shown in FIG. 2;
  • FIGS. 4 to 7 show respectively cross sectional views of the apparatus shown in FIG. 2 on the lines A-A, BB, CC and D-D;
  • FIG. 8 shows schematically the arrangements of the devices used in the following examples.
  • the construction of the pneumatically bundled yarn according to the present invention is very complicated and may vary with various factors such as, for example, numbers of twists of raw filaments, numbers of twists of the yarn obtained, shape and dimensional values of raw filaments and the yarn obtained, etc., it is advantageous to describe the construction of the yarn with reference to FIG. 1 of the accompanying drawings showing schematically a preferred embodiment of the instant yarn.
  • the yarn is composed of 4 monofilaments F F F and F and is formed by a plurality of repetitive units.
  • Each unit includes two sections A and C twisted in opposite directions respectively, i.e., in the S- and Z- directions, or vice versa, and a no-twist section B located between the sections A and C.
  • the yarn as a whole has substantially no twist or twists of not more than about 50 turns per meter.
  • the section A includes at least one subsection a -a (except a and 0 consisting of only one monofilament) composed of at least two monofilaments twisted in the same direction as the section A.
  • the construction of the section C and subsections C1-C8 (except consisting of only one monofilament is analogous to that of the section A and subsections il -(Z A no-twist section B located between the sections A and C is substantially composed of a plurality of monofilaments having no twist. At least one monofilament, e.g., F and F transfers respectively from the subsections a and a to the adjacent subsection a.,. In other words, each and all subsections are defined by transferring one or more monofilaments from one subsection to another. In this manner, the yarn is composed of a 3 plurality of aforementioned units so that the sections are provided in order of A, B, C, B, A and so on.
  • a selected monofilarnent it is possible to form a subsection with one or more other monofilaments or alternatively remain by itself among subsections. Due to the cohesive property inherent to textile monofilament and enforced twists, the instant yarn is compact and cherent so that it is possible to use the yarn in place of conventional true twist yarn for various textile operations.
  • a process for producing pneumatically bundled yarn characterized by that at least 3 monofilarnents are passed under a tension through a steady fluid stream flowing in a spiral, said monofilaments having substantially no twist.
  • Any fluid which is harmless to textile filaments and yarns may be used for the purpose of the present invention, preferably, under a gauge pressure of about 1-7 kg./crr1. measured at the inlet 15 (FIG. 2). Taking into account the availability and cost requirements, it is advantageous to use air at or above ambient temperature, or steam above 100 C.
  • a low d value (the term d value will be defined infra) can be obtained by wetting the monofilaments with a suitable substance, such as, for example, water or a surface active agent, in advance of their passing through the steady spiral-flowing fluid stream.
  • a suitable substance such as, for example, water or a surface active agent
  • One embodiment of the process according to the present invention specifically directed to the production of pneumatically bundled yarn in a relaxed state is characterized by the fact that the monofilarnents are over-fed into the spiral fluid stream. Similar results can also be achieved by over-feeding and heat-setting the yarn bundle obtained by the instant process.
  • the process of the present invention can be advantageously incorporated with various other textile operations. For example, it is possible to treat the monofilaments put out from the spinning nozzle in the manner according to the present invention. It is also possible to treat the already drawn filaments or those during drawing in the manner according to the present invention.
  • the process of the present invention can be carried out with a rapid speed such as, e.g., more than 300 meters/ minute.
  • Various filaments including, e.g., drawn filaments and undrawn filaments can be treated according to this process, but especially good results can be obtained by the use of various man-made fibers such as, regenerated fibers, or synthetic fibers (for example, polyamide fibers, polyester fibers, polyacrylonitrile fibers, polyolefines fibers, polyvinyl alcohol fibers, fibers made of copolymer thereof, etc.).
  • the process for producing pneumatically bundled yarn according to the present invention can be advantageously carried out by using an apparatus which is characterized by (a) a fluid source for generating a fluid stream, (b) a fluid supply means being located between said fluid source and a converter and feeding said fluid stream into the converter, (c) a converter for converting said fluid stream into a steady stream flowing in a spiral towards its outlet, and (d) a yarn guide being located at least partly inside of said fluid supply means so as to project into the inside of said converter substantially in axial alignment, and guiding a plurality of monofilaments to be bundled straight through said steady stream flowing in the spiral in its axial direction in such a manner that any unsteady fluid stream would not give a deteriorative influence upon said monofilaments.
  • any conventional fluid generating means can be used.
  • the converter it is possible to use any twist pipe, as far as the following conditions are satisfied:
  • the axis of the twist pipe is a straight line and is located at the inside thereof.
  • twist pipe at least one symmetrical axis in its cross section, for example, those taking the ellipse form, rectangular form, rounded rectangular form, oval form, etc.
  • the shape and dimensional values of the twist pipe according to the present invention can be determined preferably by experiments. It has been found that good results can be obtained, for example, by using a twist pipe having an elliptical cross section, a length of 2-30 cm. and a pitch of l-20 turns/ 10 cm. under the following conditions:
  • Fluid pressure measured at an inlet 1-7 kg./cm.
  • Types of fluid air, nitrogen gas, or steam.
  • Tension of filaments 0.0l0.5 grarn/ denier.
  • Fluid temperature at or above ambient temperature.
  • the apparatus has a fluid source (not shown), a fluid supply means 11, a converter 12 and a depicted yarn guide 13.
  • the fluid source is connected to an inlet 15 of the fluid supply means 11 so as to supply a fluid stream into the converter 12 affixed to the fluid supply means 11 at its center portion, although it is also possible to supply the fluid therein at any desired portion of the fluid supply means when no deteriorative influence is observed.
  • One end of the fluid supply means is connected to the converter 12 in axial alignment relationship.
  • 'Ihe yarn guide 13 is located in the inside of the fluid supply means 11 in axial alignment with the converter 12 so as to feed the filaments into the converter 12.
  • the yarn guide is composed of a small pipe having two openings 16 and 17 at each end.
  • the converter 12 converts the fluid stream received from the fluid supply means 11 into a steady stream flowing in a spiral, through which the filaments guided by the yarn guide 13 are passed so as to be subjected to the pneumatic bundling according to the present invention.
  • the converter 12 has a substantially elliptical body and is connected to the fluid supply means 11 by means of a connector 14, although various forms other than the ellipse form can be used for this purpose.
  • a yarn sample about 2 meters in length was hung by fixing its upper end and at the same time by loading its lower end with a load of 0.3 gram/denier.
  • a hook having a weight of (deniers of monofilament (3/5)) grams was then inserted at its upper end. After the hook moved downwardly and stopped, the distance of the movement of the hook was measured. Similar measurements were repeated 50 times. From the obtained values, there was yielded an arithmetic mean value representing d value.
  • TAB LE 1 (A) Oval Is 5I0 (G)-.- Rounded rectangle 1. 0X3.0
  • a and b represent respectively the minimum and maximum distance between the center line of the twist pipe and its inner wall).
  • Table 2 represents, for comparison purposes, the results obtained from the experiments carried out in a similar manner to that described above by using commercial nylon 6 yarns available in Japan.
  • A Type of fiber
  • B Type of apparatus
  • C Total deniers/filaments
  • D Twist, turns/ meter
  • E Separation, d
  • Air Ambient temperature 1.5 do do 6 sample yarn was prepared by twisting the said yarn Type additionally so as to give a total twist of 200 turns/ meter, which is likely to fall into the range used conventionally by numerous fabric manufacturers for various practical purposes.
  • A Type of filaments (total deniers/ filaments).
  • EXAMPLE 47 After wetting with water, nylon 6 filaments (70 deniers/24 filaments; no twist) were passed through an apparatus according to the present invention (type A) under a tension of 6.5 g./70 den. and with a speed of S00 meters/minute. Air was used as a fluid under a pressure of 4 kg./cm. The obtained 4 value was 2.8 cm. For comparison purpose, a similar treatment was carried out without wetting with water to give a at value of 6.1 cm.
  • EXAMPLE 48 After wetting with an aqueous solution (1%) of Carbowax (trade name of a surface active agent available from Ipposha Yushi Kogyo K.K., Japan), nylon 6 filaments (70 deniers/24 filaments; no twist) were passed through the apparatus according to the present invention (type A) in which air was used as a fluid under a pressure of 4 kg./cm. under a tension of 6.5 g./70 den.
  • Carbowax trade name of a surface active agent available from Ipposha Yushi Kogyo K.K., Japan
  • nylon 6 filaments 70 deniers/24 filaments; no twist
  • the pneumatically bundled yarn obtained was overfed at a rate of 7% and was carried through a heater having a length of 40 mm. at 180 C. to a package with a winding speed of 400 meters/minute.
  • the relaxed yarn EXAMPLE 49 Nylon 6 filaments (70 deniers/24 filaments; no twist) were over-fed at a range of 7% and were passed through a heater having a length of 400 mm. at 185 C. After this treatment the filaments were wetted with Water, were passed through an apparatus according to the present invention (type F) and were wound on a package with a winding speed of 450 meters/minute. Air was used as a fluid :at ambient temperature and under a pressure of 4 kg./cm. A tension of 5 g./ 70 deniers were loaded on the filaments.
  • the obtained pneumatically bundled yarn had a boil shrinkage of 7.5% and a d value of 3.8 cm.
  • Nylon 6 filaments (220 deniers/24 filaments; undrawn; no twist) were drawn at a draw ratio of 3.2 by the use of a drawn winder of conventional type and were fed to a package through the apparatus according to the present invention (Type A) with a speed of 600 meters/ minute. Air was used as a fluid at ambient temperature under a pressure of 5 kg./cm. There was obtained a pneumatically bundled yarn (69 deniers/24 filaments) having a d value of 4.1 cm.
  • the yarn is composed of at least 3 monofilaments
  • the yarn is formed by a plurality of repetitive units, each of which includes a S-twisted section, a Z-twisted section and a no-twist section located between the S and Z-twisted sections, but the yarn as a whole has substantially no twist,
  • each of said twisted sections includes respectively at least one subsection composed of at least two monofilaments twisted in the same direction as that of said twisted direction, and
  • one or more monofilaments are at least partly entwisted with one or more other random monofilaments so as to form the said subsection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US734400A 1967-06-06 1968-06-04 Pneumatically bundled yarn Expired - Lifetime US3509709A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3609467 1967-06-06

Publications (1)

Publication Number Publication Date
US3509709A true US3509709A (en) 1970-05-05

Family

ID=12460154

Family Applications (1)

Application Number Title Priority Date Filing Date
US734400A Expired - Lifetime US3509709A (en) 1967-06-06 1968-06-04 Pneumatically bundled yarn

Country Status (3)

Country Link
US (1) US3509709A (enExample)
DE (1) DE1760520A1 (enExample)
GB (1) GB1225653A (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3744232A (en) * 1971-04-05 1973-07-10 Bigelow Sanford Inc Composite false-twist yarn
US3775955A (en) * 1971-07-30 1973-12-04 Bigelow Sanford Inc Composite false-twist yarns, methods and apparatus
US3823449A (en) * 1971-12-27 1974-07-16 Akzona Inc Apparatus for interlacing yarns
US4058960A (en) * 1976-08-17 1977-11-22 Pavel Mikhailovich Movshovich Distributing device for supplying compressed air to chambers of apparatus for making self-twisted product
CN103184652A (zh) * 2013-03-22 2013-07-03 浙江森创服装有限公司 一种慕赛尔纤维/远红外纤维的高档针织面料

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2990671A (en) * 1958-08-01 1961-07-04 Du Pont Multiple vortex pneumatic twister and method of producing alternate twist yarn
US3079746A (en) * 1961-10-23 1963-03-05 Du Pont Fasciated yarn, process and apparatus for producing the same
US3225533A (en) * 1961-10-19 1965-12-28 Commw Scient Ind Res Org Apparatus and process for forming yarns and other twisted assemblies
US3306023A (en) * 1967-02-28 Process for forming twisted fibre assemblies
US3434275A (en) * 1967-04-26 1969-03-25 Stanley Backer Alternate twist yarns and method of forming same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306023A (en) * 1967-02-28 Process for forming twisted fibre assemblies
US2990671A (en) * 1958-08-01 1961-07-04 Du Pont Multiple vortex pneumatic twister and method of producing alternate twist yarn
US3225533A (en) * 1961-10-19 1965-12-28 Commw Scient Ind Res Org Apparatus and process for forming yarns and other twisted assemblies
US3079746A (en) * 1961-10-23 1963-03-05 Du Pont Fasciated yarn, process and apparatus for producing the same
US3434275A (en) * 1967-04-26 1969-03-25 Stanley Backer Alternate twist yarns and method of forming same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3744232A (en) * 1971-04-05 1973-07-10 Bigelow Sanford Inc Composite false-twist yarn
US3775955A (en) * 1971-07-30 1973-12-04 Bigelow Sanford Inc Composite false-twist yarns, methods and apparatus
US3823449A (en) * 1971-12-27 1974-07-16 Akzona Inc Apparatus for interlacing yarns
US4058960A (en) * 1976-08-17 1977-11-22 Pavel Mikhailovich Movshovich Distributing device for supplying compressed air to chambers of apparatus for making self-twisted product
CN103184652A (zh) * 2013-03-22 2013-07-03 浙江森创服装有限公司 一种慕赛尔纤维/远红外纤维的高档针织面料

Also Published As

Publication number Publication date
DE1760520A1 (de) 1972-04-20
GB1225653A (enExample) 1971-03-17

Similar Documents

Publication Publication Date Title
US3009309A (en) Fluid jet twist crimping process
US3279164A (en) Fluid jet process for twisting yarn
US3535866A (en) Process and apparatus for producing crimped yarns
US2990671A (en) Multiple vortex pneumatic twister and method of producing alternate twist yarn
US2852906A (en) Method and apparatus for producing bulky continuous filament yarn
US3079746A (en) Fasciated yarn, process and apparatus for producing the same
US3822543A (en) Spun-like yarn and method of manufacturing same
US3125793A (en) Interlaced yarn by multiple utilization of pressurized gas
US3286321A (en) Method of treating multifilament yarn
US3389444A (en) Apparatus for entangling multifilament yarns
US3751775A (en) Apparatus and process for commingling multifilament yarn
US3443292A (en) Apparatus for interlacing multi-filament yarn
US3220082A (en) Jet apparatus for treatment of textile fibers
US4559772A (en) False twist texturized yarn, and a process for its preparation
US3509709A (en) Pneumatically bundled yarn
Miao et al. Air interlaced yarn structure and properties
GB828641A (en) Improvements in and relating to the production of fancy yarns
US3462813A (en) Method of producing volumized yarn
US3823541A (en) Effect voluminous yarn
US4026099A (en) Differentially drafted lofted multi-component continuous filament yarn and process for making same
US4505013A (en) Process and apparatus for making coherent yarn
US3775958A (en) Pneumatic false twisting interlacer
US3010270A (en) Apparatus for producing voluminous yarn
SU1764516A3 (ru) Система дл текстурировани
FI71358C (fi) Foerfarande och anordning foer sammanblandande av filament av ett multifilamentgarn