CA1145907A - Self-texturing splittable conjugate yarn - Google Patents
Self-texturing splittable conjugate yarnInfo
- Publication number
- CA1145907A CA1145907A CA000342810A CA342810A CA1145907A CA 1145907 A CA1145907 A CA 1145907A CA 000342810 A CA000342810 A CA 000342810A CA 342810 A CA342810 A CA 342810A CA 1145907 A CA1145907 A CA 1145907A
- Authority
- CA
- Canada
- Prior art keywords
- filament
- sub
- filaments
- hollow
- stream
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Multicomponent Fibers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
This invention provides a process for melt-spinning a hollow conjugate filament splittable into spontaneously texturing sub-filaments. The process comprises extruding a hollow molten stream formed from axially extending segments of dissimilar polymers arranged alternately in side-by-side adhering relationship to form the hollow molten stream. The stream is then quenched under conditions sufficient to form a filament and the filament is then withdrawn from the stream at a predetermined spinning speed.
The polymers, the spinning speed and the quenching conditions are sufficient to form a filament characterized in that sub-filaments split from the filament possess substantial latent torqueless helical crimp. A hollow conjugate filament being substantially free of crimp with sub-filaments possessing substantial latent torqueless helical crimp is also disclosed.
This invention provides a process for melt-spinning a hollow conjugate filament splittable into spontaneously texturing sub-filaments. The process comprises extruding a hollow molten stream formed from axially extending segments of dissimilar polymers arranged alternately in side-by-side adhering relationship to form the hollow molten stream. The stream is then quenched under conditions sufficient to form a filament and the filament is then withdrawn from the stream at a predetermined spinning speed.
The polymers, the spinning speed and the quenching conditions are sufficient to form a filament characterized in that sub-filaments split from the filament possess substantial latent torqueless helical crimp. A hollow conjugate filament being substantially free of crimp with sub-filaments possessing substantial latent torqueless helical crimp is also disclosed.
Description
'` ~L~L9LS~(~'7 C~14-5~ 04~1 SELF~ XTURING SPLITTABLE CONJUGATE YARN
SPECIFICATION
The invention relates to the art of conjugate filaments splittable into sub-~ilaments. More particularly, it relates to a process and product wherein the conjugate filament itself has no substantial texture while sub-fila-ments splittable therefrom have substantial latent torque-less helical~crimp.
Conjugate filaments splittable into sub-fila-men~s are known to the art7 as typi~ied by Hayashi U.S. Pa-t~ent 4jO51,287. As disclosed therein, alternating segments of polyamide and polyester are spun in a side-by-side adhering relationship to form a hollow filament splittable into sub-filaments. Such sub~filaments can be of smaller denier than can be conventiently spun as separate filaments, lending a soft hand to fabrics made there~rom. The sub-filaments of Hayashi are not disclosed as possessi.ng significant crimp, and, as illustrated in Figure 10 o~ the patent, are substan-tislly flat (untextured) even though the conjugate filament had been textur~ed by the ~alse-twis~t heat~-set method before ; being~split;into sub-filaments. ~
According to the invention,~there is provided a conjuga~e filament~splittable into sub-filaments ha~Jing sub-stantial latent torqueless helical~crlmp.
~ ~ According to a major aspect~of~the invention, there is provided a process ~or melt-spinning~a hollow conjugate filament splittable into spontaneously texturing sub-filaments, the process;comprising extruding a hollow ::
~ .
- ' ' : . : ., , ', " ': ' ' ': ~ ~ ~
SPECIFICATION
The invention relates to the art of conjugate filaments splittable into sub-~ilaments. More particularly, it relates to a process and product wherein the conjugate filament itself has no substantial texture while sub-fila-ments splittable therefrom have substantial latent torque-less helical~crimp.
Conjugate filaments splittable into sub-fila-men~s are known to the art7 as typi~ied by Hayashi U.S. Pa-t~ent 4jO51,287. As disclosed therein, alternating segments of polyamide and polyester are spun in a side-by-side adhering relationship to form a hollow filament splittable into sub-filaments. Such sub~filaments can be of smaller denier than can be conventiently spun as separate filaments, lending a soft hand to fabrics made there~rom. The sub-filaments of Hayashi are not disclosed as possessi.ng significant crimp, and, as illustrated in Figure 10 o~ the patent, are substan-tislly flat (untextured) even though the conjugate filament had been textur~ed by the ~alse-twis~t heat~-set method before ; being~split;into sub-filaments. ~
According to the invention,~there is provided a conjuga~e filament~splittable into sub-filaments ha~Jing sub-stantial latent torqueless helical~crlmp.
~ ~ According to a major aspect~of~the invention, there is provided a process ~or melt-spinning~a hollow conjugate filament splittable into spontaneously texturing sub-filaments, the process;comprising extruding a hollow ::
~ .
- ' ' : . : ., , ', " ': ' ' ': ~ ~ ~
-2- C-14-5~-0441 molten stream formed from axially extending segments of dissimilar polymers arranged alternately in side-by-side adhering relationship to form the hollow molten stream;
quenching the stream under given conditions to form a filament; and withdrawing the filament from the molten stream at a given spinning speed, the polymers, the given spinning speed and the given conditions being selected such that sub-filaments split from the filament possess substa~tial latent torqueless helical crimp.
According to another aspect of the invention, some of the segments are of polyamide polymer and others of the segments are of polyester polymer.
According to another aspect of the invention, the polyamide polymer is nylon 66 and the polyester polymer is polyethylene terephthalate.
According to another major aspect of the invention, there is provided a conjugate filament comprising sub-filaments releasabl~ attached to one another in a side-by-side relationship, the filament being substantially free of crimp, the sub~filaments possessing substantial latent torqueless helical crimp.
According to another aspect of the invention, the filament is hollow.
According to another aspect of the invention, some of the sub-filaments are formed from a polyamide polymer and others of the sub-filaments are formed from a polyester polymer.
According to another aspect o the invention, the polyamide polymer is nylon 66 and the polyester polymer is polyethylene terephthalate.
Other aspects of ~he invention will in part appear hereinafter and ~ill in par~ be obvious from the following detailed description taken together with the accompanying drawing, in which:
The FIGURE is a bottom plan view (looking up~ of the preferred spinneret orifice used in practicing the inven-tion.
., .: . ' ' . :
,:
, , ' :
5~ ~ ~
quenching the stream under given conditions to form a filament; and withdrawing the filament from the molten stream at a given spinning speed, the polymers, the given spinning speed and the given conditions being selected such that sub-filaments split from the filament possess substa~tial latent torqueless helical crimp.
According to another aspect of the invention, some of the segments are of polyamide polymer and others of the segments are of polyester polymer.
According to another aspect of the invention, the polyamide polymer is nylon 66 and the polyester polymer is polyethylene terephthalate.
According to another major aspect of the invention, there is provided a conjugate filament comprising sub-filaments releasabl~ attached to one another in a side-by-side relationship, the filament being substantially free of crimp, the sub~filaments possessing substantial latent torqueless helical crimp.
According to another aspect of the invention, the filament is hollow.
According to another aspect of the invention, some of the sub-filaments are formed from a polyamide polymer and others of the sub-filaments are formed from a polyester polymer.
According to another aspect o the invention, the polyamide polymer is nylon 66 and the polyester polymer is polyethylene terephthalate.
Other aspects of ~he invention will in part appear hereinafter and ~ill in par~ be obvious from the following detailed description taken together with the accompanying drawing, in which:
The FIGURE is a bottom plan view (looking up~ of the preferred spinneret orifice used in practicing the inven-tion.
., .: . ' ' . :
,:
, , ' :
5~ ~ ~
-3~ C-14-54-0441 As shown in the FIGURE~ the preferred spinneret construction includes several generally arched or horseshoe-shaped slots 2Q in spinneret blank 22 arranged symmetrically about a central point,'the open ends of the horseshoe shape facing inwardly. The several slots 20 constitute a combined orifice for spinning a single filament. Slots 20 extend entireIy through blank 22 except for a recessed web region 24 at the apex of each slot 20. The ~wo dissimilar polymers are fed to the combined orifice as a sheath-core stream, with dotted circle 26 representing the interface between the two polymers. The adjacent ends of adjacent slots 20 are ~ sufficiently close that the streams issuing therefrom unite ; just below the spinneret. The molten stream is thus a hollow structure composed of alternating axially extending segments of the two polymers. Surface tension and other effects tend to make the molten stream approach a hollow circular cross-section prior to solidification, substantiall~ as shown in Hayashi Figure 1.
Each polymer segment accordingly has a portion of its periphery exposed to'quenching on the exterior of the hollow stream, and an opposite portion shielded and not so exposed since it lies in the interior. According to the invention, the molten stream is exposed while under the stress of spinning to quenching sufficiently rapid as to produce substantial latent torqueless helical crimp in the sub-ilaments splittable from the conjugate filament.
Example I
Nylon 66 polymer and polyethylene terephthalate polymer, each of normal molecular weight for apparel end uses, are extruded at a temperature of 290C. through the combined orifice, the nylon polymer being the core of the sheath-core stream approaching the combined orifice. Equal volumes of the two polymers are supplied, with the extrusion rate selected to produce a conjugate filament having a denier of 19.5 at a spinning speed of 1500 yards (about 1350 meters) per minute, A quench zone just beneath the spinneret and 12 meters in height is supplied with quenching air~at 20C., the air being directed 'norizontally onto~the polymer stream and having a speed of 25 meters per minute. Below the quench , .
- : , ~ ~ 4 59~r~
zone, steam is applied to the filament, a conventional finish is applied, and the filament is wound.
The sRun filament is then drawn at 65 meters per minute and at a draw ratio of 2.16 over a contact heater at 132 C , the heater being 0.4 meters long. The resultin~
drawn filament, when mechanically worked to break the con~ugate filament into 12 sub-filaments, develops no sub-stantial torqueless helical crimp when subjected to boiling water.
Example II
Seventeen of the a~oYe spun~filaments are spun - simultaneously and collected as a multifilament yarn under the spinning conditions of Example I. The spun yarn is then ~raw-textured at 540 meters per minute over a two meter heater set at 220 C. The resulting textured yarn, when separated into sub-filaments and relaxed, is ~ery voluminous and has high covering power.
Example III
Example I is repeated, except that the spinning speed is increased to 4500 meters per minute while the denier of the conjugate filament is reduced to 4. The resulting sub-filaments, after separation and immersion in boiling water r form a highly voluminous and lofty yarn. Fabrics formed from the conjugate filament acquire a very soft hand and increased bu]k and covering power when the fabric i5 mechanically worked enough to separate the yarn into sub-filaments. Simple exposure of the fabric to boiling ~ water is ade~uate in many instances, since the flexing of the ~arn involYed in certain fabric formations separates the sub-filaments This ap~lication discloses an embodiment disclosed and claimea in copending application serial number 348,447, filed March 26, 1980.
. . .
, ~, ., .. . . .
- ~ . .-:
~ .
: `~
Each polymer segment accordingly has a portion of its periphery exposed to'quenching on the exterior of the hollow stream, and an opposite portion shielded and not so exposed since it lies in the interior. According to the invention, the molten stream is exposed while under the stress of spinning to quenching sufficiently rapid as to produce substantial latent torqueless helical crimp in the sub-ilaments splittable from the conjugate filament.
Example I
Nylon 66 polymer and polyethylene terephthalate polymer, each of normal molecular weight for apparel end uses, are extruded at a temperature of 290C. through the combined orifice, the nylon polymer being the core of the sheath-core stream approaching the combined orifice. Equal volumes of the two polymers are supplied, with the extrusion rate selected to produce a conjugate filament having a denier of 19.5 at a spinning speed of 1500 yards (about 1350 meters) per minute, A quench zone just beneath the spinneret and 12 meters in height is supplied with quenching air~at 20C., the air being directed 'norizontally onto~the polymer stream and having a speed of 25 meters per minute. Below the quench , .
- : , ~ ~ 4 59~r~
zone, steam is applied to the filament, a conventional finish is applied, and the filament is wound.
The sRun filament is then drawn at 65 meters per minute and at a draw ratio of 2.16 over a contact heater at 132 C , the heater being 0.4 meters long. The resultin~
drawn filament, when mechanically worked to break the con~ugate filament into 12 sub-filaments, develops no sub-stantial torqueless helical crimp when subjected to boiling water.
Example II
Seventeen of the a~oYe spun~filaments are spun - simultaneously and collected as a multifilament yarn under the spinning conditions of Example I. The spun yarn is then ~raw-textured at 540 meters per minute over a two meter heater set at 220 C. The resulting textured yarn, when separated into sub-filaments and relaxed, is ~ery voluminous and has high covering power.
Example III
Example I is repeated, except that the spinning speed is increased to 4500 meters per minute while the denier of the conjugate filament is reduced to 4. The resulting sub-filaments, after separation and immersion in boiling water r form a highly voluminous and lofty yarn. Fabrics formed from the conjugate filament acquire a very soft hand and increased bu]k and covering power when the fabric i5 mechanically worked enough to separate the yarn into sub-filaments. Simple exposure of the fabric to boiling ~ water is ade~uate in many instances, since the flexing of the ~arn involYed in certain fabric formations separates the sub-filaments This ap~lication discloses an embodiment disclosed and claimea in copending application serial number 348,447, filed March 26, 1980.
. . .
, ~, ., .. . . .
- ~ . .-:
~ .
: `~
Claims (6)
1. A process for melt-spinning a hollow conjugate filament splittable into spontaneously texturing sub-filaments, said process comprising:
(a) extruding a hollow molten stream formed from axially extending segments of dissimilar polymers arranged alternately in side-by-side adhering relationship to form said hollow molten stream;
(b) quenching said stream under conditions sufficient to form a filament; and (c) withdrawing said filament from said molten stream at a predetermined spinning speed, said polymers, said spinning speed and said quenching conditions being sufficient to form a filament characterized in that sub-filaments split from said filament possess substantial latent torqueless helical crimp.
(a) extruding a hollow molten stream formed from axially extending segments of dissimilar polymers arranged alternately in side-by-side adhering relationship to form said hollow molten stream;
(b) quenching said stream under conditions sufficient to form a filament; and (c) withdrawing said filament from said molten stream at a predetermined spinning speed, said polymers, said spinning speed and said quenching conditions being sufficient to form a filament characterized in that sub-filaments split from said filament possess substantial latent torqueless helical crimp.
2. The process defined in claim 1, wherein some of said segments are of polyamide polymer and others of said segments are of polyester polymer.
3. The process defined in claim 2, wherein said polyamide polymer is nylon 66 and said polyester polymer is polyethylene terephthalate.
4. A hollow conjugate filament comprising sub-filaments formed of dissimilar polymers releasably attached to one another in a side-by-side relationship, said filament being substan-tially free of crimp, said sub-filaments possessing substantial latent torqueless helical crimp.
5. The filament defined in claim 4, wherein some of said sub-filaments are formed from a polyamide polymer and others of said sub-filaments are formed from a polyester polymer.
6. The filament defined in claim 5, wherein said polyamide polymer is nylon 66 and said polyester polymer is polyethylene terephthalate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US84879A | 1979-01-02 | 1979-01-02 | |
| US848 | 1979-01-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1145907A true CA1145907A (en) | 1983-05-10 |
Family
ID=21693265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000342810A Expired CA1145907A (en) | 1979-01-02 | 1979-12-31 | Self-texturing splittable conjugate yarn |
Country Status (5)
| Country | Link |
|---|---|
| EP (2) | EP0065788A3 (en) |
| JP (1) | JPS55128016A (en) |
| KR (1) | KR840001633B1 (en) |
| CA (1) | CA1145907A (en) |
| DE (1) | DE2966478D1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4246219A (en) * | 1979-03-27 | 1981-01-20 | Monsanto Company | Multisegmented filament spinning process |
| EP0074445A1 (en) * | 1981-09-15 | 1983-03-23 | Monsanto Company | Spinning process and multifilament yarn |
| DE3170615D1 (en) * | 1981-09-15 | 1985-06-27 | Monsanto Co | Multifilament yarn and spinning process therefor |
| US5093061A (en) * | 1982-03-08 | 1992-03-03 | Monsanto | Deep dyeing conjugate yarn processes |
| JPS6075665A (en) * | 1983-10-01 | 1985-04-30 | 東レ株式会社 | Fibrile interlacing method of multicomponent fiber |
| EP0376625B1 (en) * | 1988-12-28 | 1996-09-18 | Asahi Kasei Kogyo Kabushiki Kaisha | Acrylic synthetic fiber and process for preparation thereof |
| CN109957856B (en) * | 2017-12-25 | 2022-07-19 | 上海凯赛生物技术股份有限公司 | Parallel composite fiber and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3117906A (en) * | 1961-06-20 | 1964-01-14 | Du Pont | Composite filament |
| JPS5228918B2 (en) * | 1972-05-23 | 1977-07-29 | ||
| JPS581221B2 (en) * | 1974-12-12 | 1983-01-10 | 帝人株式会社 | Shikagawa henshiyokubutsuno |
| US4246219A (en) * | 1979-03-27 | 1981-01-20 | Monsanto Company | Multisegmented filament spinning process |
-
1979
- 1979-12-28 JP JP17401479A patent/JPS55128016A/en active Pending
- 1979-12-31 CA CA000342810A patent/CA1145907A/en not_active Expired
- 1979-12-31 EP EP82105614A patent/EP0065788A3/en not_active Ceased
- 1979-12-31 DE DE7979303081T patent/DE2966478D1/en not_active Expired
- 1979-12-31 KR KR7904716A patent/KR840001633B1/en active IP Right Grant
- 1979-12-31 EP EP79303081A patent/EP0013186B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0065788A3 (en) | 1984-11-28 |
| EP0013186B1 (en) | 1983-12-07 |
| DE2966478D1 (en) | 1984-01-12 |
| KR840001633B1 (en) | 1984-10-12 |
| KR830001428A (en) | 1983-04-30 |
| EP0065788A2 (en) | 1982-12-01 |
| JPS55128016A (en) | 1980-10-03 |
| EP0013186A1 (en) | 1980-07-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 20000510 |