CA1139068A - Multisegmented filament spinning process - Google Patents
Multisegmented filament spinning processInfo
- Publication number
- CA1139068A CA1139068A CA000348447A CA348447A CA1139068A CA 1139068 A CA1139068 A CA 1139068A CA 000348447 A CA000348447 A CA 000348447A CA 348447 A CA348447 A CA 348447A CA 1139068 A CA1139068 A CA 1139068A
- Authority
- CA
- Canada
- Prior art keywords
- slot
- stream
- spun
- given
- orifice
- 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
- 238000009987 spinning Methods 0.000 title claims abstract description 10
- 229920000642 polymer Polymers 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000021615 conjugation Effects 0.000 abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 abstract description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 241000490229 Eucephalus Species 0.000 description 1
- 241000026407 Haya Species 0.000 description 1
- 241001674048 Phthiraptera Species 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009986 fabric formation Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
- Y10T428/2931—Fibers or filaments nonconcentric [e.g., side-by-side or eccentric, etc.]
Abstract
ABSTRACT OF THE DISCLOSURE This invention provides a spinning process for producing a spun stream comprising a plurality of separate spun interfaces from a given single interface between different polymers in a supply stream. The given interface extends generally parallel to the direction of the supply stream, and the process is characterized by the steps of passing the supply stream through a spinneret orifice which is effectively in the form of an elongated slot. The cross-sectional shape of the orifice and the given interface are selected and located with respect to each other such that a first portion of the given interface passes through and extends transversely across the width of the slot at a first location along the length of the slot and a second portion of the given interface passes through and extends transversely across the width. of the slot at a second location along the length. of the slot. The spun stream issuing from the slot is then solidified. The process of this invention overcomes disadvantages involved in prior art processes which entail a considerable complexity in the conjugation plates prior to the spinneret itself; with the present invention, the conjugation plates upstream of the spinneret can be considerably simplified by appropriate design of the spinneret orifice.
Description
MUL~ISEGMENTED FI~LA~E~ S~;I~N-:[NG PROCESS
.. ... _ _ The invention relates to the art of spinning conjugate filaments having at least two interfaces between different polymers.
It has long been known to spin conj~gate filaments having a single interface between different polymeric componen~s.
Conjugate filaments having a plurality of interfaces between different polymeric components are likewise known, as typified by Hayashi U.S. Patent 4,Q51,287. As disclosed therein, alternating segments of polyamide and polyester are spun in side-by-side adhering relationship to form a hollow filament.
The Hayashi spinning process involves forming a large number of separate polymer interfaces prior to -the spinneret orifice, which entails a considerable complexity in the conjugation plates prior to the spinneret itself.
According to the present invention, the conjugation plates upstream of the spinneret can be considerabl~ simpli-fied by appropriate design of the spinneret orifice.
According to a major aspect o~ the inven-tion, -there is provided a spinning process for producing a spun stream comprisiny a plurality of separate spun interfaces from a given single interface between different polymers in a supply stream, the given interface extending generally parallel to the direction of the supply stream, the process comprising:
passing the supply stream through a spinneret orifice~ the orifice being effectivel~ in the form of an elongated slot, the cross-sectional shape of the orifice and the cross-,~`',`` ~
3 ~
.. ... _ _ The invention relates to the art of spinning conjugate filaments having at least two interfaces between different polymers.
It has long been known to spin conj~gate filaments having a single interface between different polymeric componen~s.
Conjugate filaments having a plurality of interfaces between different polymeric components are likewise known, as typified by Hayashi U.S. Patent 4,Q51,287. As disclosed therein, alternating segments of polyamide and polyester are spun in side-by-side adhering relationship to form a hollow filament.
The Hayashi spinning process involves forming a large number of separate polymer interfaces prior to -the spinneret orifice, which entails a considerable complexity in the conjugation plates prior to the spinneret itself.
According to the present invention, the conjugation plates upstream of the spinneret can be considerabl~ simpli-fied by appropriate design of the spinneret orifice.
According to a major aspect o~ the inven-tion, -there is provided a spinning process for producing a spun stream comprisiny a plurality of separate spun interfaces from a given single interface between different polymers in a supply stream, the given interface extending generally parallel to the direction of the supply stream, the process comprising:
passing the supply stream through a spinneret orifice~ the orifice being effectivel~ in the form of an elongated slot, the cross-sectional shape of the orifice and the cross-,~`',`` ~
3 ~
-2~ C 1~-54~0446 sectional shape o~ th~ given i~tQr~ace being s~lected and located with respect to one anotker such that a first portion of t~ gîven interface passes through and extends trans-versel~ across the wldth of the slot at a first location along the length of the slot, and a second portion o~ ~he given interface passes through and extends transversely across th~ width of t~e slot at a second location along the length of the slot; and solidifying the spun stream issuing from the slot.
According to another aspect of the invention, the polymers in the suppl~ stream are in sheath-core reIationship.
According to another aspect of the invention, the slot meanders ~ack and forth across the inter~ace.
According to another aspect o~ the in~ention, the polymer ~orming the core has lower viscosity than the polymer forming the sheath.
According to another aspect of the invention, the polymers are dissimilar.
Other aspects of the invention will in part appear 20. hereinafter and will in part be obvious from the following detailed description taken in connection with the accompany-ing DRAWING in which:
The single FIGURE is a botto~ plan view (looking up) of the preferred spinneret orifice used in practicing the invention.
As shown in the FIGURE, the preferred spinneret construction includes several generally arched or horseshoe-shaped slots 20 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 entirely through blank 22 except for a recessed web region 24 at the apex of each slot 20. The two difèrent pol~mers are fed to the combined orifice as a sheath-core supply stream, with dotted circle 26 representing the interface between the two polymers. The adjacent ends of adjacent slots 20 are suff:iciently close that the streams issuing therefrom unite just below the spinneret. The molten spun stream is thus a hollow structure composed of alternating axially extending
According to another aspect of the invention, the polymers in the suppl~ stream are in sheath-core reIationship.
According to another aspect of the invention, the slot meanders ~ack and forth across the inter~ace.
According to another aspect o~ the in~ention, the polymer ~orming the core has lower viscosity than the polymer forming the sheath.
According to another aspect of the invention, the polymers are dissimilar.
Other aspects of the invention will in part appear 20. hereinafter and will in part be obvious from the following detailed description taken in connection with the accompany-ing DRAWING in which:
The single FIGURE is a botto~ plan view (looking up) of the preferred spinneret orifice used in practicing the invention.
As shown in the FIGURE, the preferred spinneret construction includes several generally arched or horseshoe-shaped slots 20 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 entirely through blank 22 except for a recessed web region 24 at the apex of each slot 20. The two difèrent pol~mers are fed to the combined orifice as a sheath-core supply stream, with dotted circle 26 representing the interface between the two polymers. The adjacent ends of adjacent slots 20 are suff:iciently close that the streams issuing therefrom unite just below the spinneret. The molten spun stream is thus a hollow structure composed of alternating axially extending
-3- C~ 5~-0~46 segmen~s of ~he two polymers. Surface tension and other effec~s ~end to make the'molten spun stream approach a ; hollow circular cross-section prior to solidification, sub~
stantially as shown in Haya~hi Figwre 1.
The spinning procesæ thus produces a spun stream comprising a pluralit~ of separate'spun interfaces from the single's~eath-core'interfac~ between the different polymers in the supply s~ream, the sheath-core supply interface extend-ing generally parallel to the direction of the supply stream.
This is accomplis~ed in this e~bodiment by passing the supply stream througn a spinneret orifice having the form of an elongated slot. The cross-sectional shape of the ori~ice and the cross-sectional shape of the supply interface are selected and located with respect to one another such that a first portion of the suppl~ interface passes through and extends transversely across the width of the slot at a first location along the length o the slot~ and a second portion of the supply interface passes through and extends trans-versely across t~e width of the slot at a second location along the length of the slot.
As disclosed specifically above, the several individual slots 20 are so nearly spaced as to be effectively in the form of a single continuous slot. Webs 24 and the lands between adjacent ends of adjacent slots 20 are provided merely to support and retain the metal in the center o the combined orifice. Accordingly the elongated slot contem-plated by the invention can be either a continuous single slot, or in the form o~ an interrupted slot provided that the land between adjacent slot portions is sufficiently narrow that the separate streams merge before solidification. Each individual slot 20 provides for a spun su~-stream having two interfaces, and the illustrated combined orifice provides a combined spun stream having 12 interfaces between different polymeric components.
E ample I
Nylon 66 polymer and polyethylene terephthalate poly~er, each of normal molecular ~eight for apparel end uses, are extruded at a temperature of 290C. through the com~ined orifice, the nylon pol~mer being the core of the sheath-core
stantially as shown in Haya~hi Figwre 1.
The spinning procesæ thus produces a spun stream comprising a pluralit~ of separate'spun interfaces from the single's~eath-core'interfac~ between the different polymers in the supply s~ream, the sheath-core supply interface extend-ing generally parallel to the direction of the supply stream.
This is accomplis~ed in this e~bodiment by passing the supply stream througn a spinneret orifice having the form of an elongated slot. The cross-sectional shape of the ori~ice and the cross-sectional shape of the supply interface are selected and located with respect to one another such that a first portion of the suppl~ interface passes through and extends transversely across the width of the slot at a first location along the length o the slot~ and a second portion of the supply interface passes through and extends trans-versely across t~e width of the slot at a second location along the length of the slot.
As disclosed specifically above, the several individual slots 20 are so nearly spaced as to be effectively in the form of a single continuous slot. Webs 24 and the lands between adjacent ends of adjacent slots 20 are provided merely to support and retain the metal in the center o the combined orifice. Accordingly the elongated slot contem-plated by the invention can be either a continuous single slot, or in the form o~ an interrupted slot provided that the land between adjacent slot portions is sufficiently narrow that the separate streams merge before solidification. Each individual slot 20 provides for a spun su~-stream having two interfaces, and the illustrated combined orifice provides a combined spun stream having 12 interfaces between different polymeric components.
E ample I
Nylon 66 polymer and polyethylene terephthalate poly~er, each of normal molecular ~eight for apparel end uses, are extruded at a temperature of 290C. through the com~ined orifice, the nylon pol~mer being the core of the sheath-core
4- C-14-5~-0/-~46 stream approaching the combined ori.Lice. Equal volumes of the two polymers are supplied, ~ith.the extrusion rate selec~ed to produc~ a conjugate filament havîng a denier of 19.5 at a spinning speéd of 1500 yards (about 1350 meters) per minute. A quench zone just beneath the spinneret and L5 meters in height is supplied with quenching air at 20~ he air ~eing directed horizontally onto the polymer stream and havîng a speed o 25 meters per minute. Below the quench 20ne, steam is applied to the filament, a conventional ~inish . lO is applied, and the ~ilament i~ wound.
The spun filament is then drawn at 65 meters per minute and at a draw ratio of 2.16 over a con~act heater at 132C., the heater being 0.4 meters long. The resulting drawn yarn, when mechanically worked to break ~he conjugate filament into 12 sub-filaments, develops substantial torque-less helical crimp when subjected to boiling water.
Example II
Seventeen of the above spun filaments are spun simultaneously and collected as a multifilament yarn under the spinning conditions of Example I. The spun yarn is then dr~w-textured at 540 meters per minute over a two meter heater set at 220C. The resulting textured yarn, when separated into sub-~ilaments and relaxed, is very voluminous.and has high . . covering power.
- 25 Example III
Example I is rep~ated, except that the spirmlng 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, form a highly voluminous and lofty yarn. Fabrics formed from the conjugate yarn acquire a very soft hand and increased bulk and covering power when the ,abric is mecha~ically worked enough to separate the yarn in~o sub-filaments. Simple exposure of the fabric. to boiling water is adequate in many instances, since the ~lexing of the yarn involved in certain fabric formations separates ~he sub-filaments.
In the above examples, the nylon 66 has a lowerviscosity ~han the polyethylene terephthalate. The nylon ~ ~q~
~5--will accordingly flow ~aster through the slot and acquire higher momentum, and upon exiting will tend to make the approximately star-shaped spun stream more rapidly approach the hollow circular shape which was desired in this particular instance.
In the above examples, nylon-66 and polyethylene terephthalate constitute dissimilar (as well as different) polymers. By "dissimilar" is meant that the polymeric components in the solidifed filaments can be xeadily separated into sub-filaments.
Copending application 342,810, filed December 31, 1979, discloses and claims an embodiment of the invention disclosed in -this application.
The spun filament is then drawn at 65 meters per minute and at a draw ratio of 2.16 over a con~act heater at 132C., the heater being 0.4 meters long. The resulting drawn yarn, when mechanically worked to break ~he conjugate filament into 12 sub-filaments, develops substantial torque-less helical crimp when subjected to boiling water.
Example II
Seventeen of the above spun filaments are spun simultaneously and collected as a multifilament yarn under the spinning conditions of Example I. The spun yarn is then dr~w-textured at 540 meters per minute over a two meter heater set at 220C. The resulting textured yarn, when separated into sub-~ilaments and relaxed, is very voluminous.and has high . . covering power.
- 25 Example III
Example I is rep~ated, except that the spirmlng 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, form a highly voluminous and lofty yarn. Fabrics formed from the conjugate yarn acquire a very soft hand and increased bulk and covering power when the ,abric is mecha~ically worked enough to separate the yarn in~o sub-filaments. Simple exposure of the fabric. to boiling water is adequate in many instances, since the ~lexing of the yarn involved in certain fabric formations separates ~he sub-filaments.
In the above examples, the nylon 66 has a lowerviscosity ~han the polyethylene terephthalate. The nylon ~ ~q~
~5--will accordingly flow ~aster through the slot and acquire higher momentum, and upon exiting will tend to make the approximately star-shaped spun stream more rapidly approach the hollow circular shape which was desired in this particular instance.
In the above examples, nylon-66 and polyethylene terephthalate constitute dissimilar (as well as different) polymers. By "dissimilar" is meant that the polymeric components in the solidifed filaments can be xeadily separated into sub-filaments.
Copending application 342,810, filed December 31, 1979, discloses and claims an embodiment of the invention disclosed in -this application.
Claims (5)
1. A spinning process for producing a spun stream comprising a plurality of separate spun interfaces from a given single interface between different polymers in a supply stream, said given interface extending generally parallel to the direction of said supply stream, said process character-ized by:
a. passing said supply stream through a spinneret orifice, said orifice being effectively in the form of an elongated slot, the cross-sectional shape of said orifice and the cross-sectional shape of said given interface being selected and located with respect to one another such that a first portion of said given inter-face passes through and extends trans-versely across the width of said slot at a first location along the length of said slot, and a second portion of said given interface passes through and extends transversely across the width of said slot at a second location along the length of said slot; and b. solidifying said spun stream issuing from said slot.
a. passing said supply stream through a spinneret orifice, said orifice being effectively in the form of an elongated slot, the cross-sectional shape of said orifice and the cross-sectional shape of said given interface being selected and located with respect to one another such that a first portion of said given inter-face passes through and extends trans-versely across the width of said slot at a first location along the length of said slot, and a second portion of said given interface passes through and extends transversely across the width of said slot at a second location along the length of said slot; and b. solidifying said spun stream issuing from said slot.
2. The process defined in claim 1, character-ized in that said slot meanders back and forth across said interface.
3. The process defined in claim 1, character-ized in that said polymers in said supply stream are in sheath-core relationship.
4. The process defined in claim 3, characterized in that said slot meanders back and forth across said inter-face.
5. The process defined in claim 3 characterized in that said polymer forming said core has lower viscosity than said polymer forming said sheath.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/024,350 US4246219A (en) | 1979-03-27 | 1979-03-27 | Multisegmented filament spinning process |
| US24,350 | 1979-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1139068A true CA1139068A (en) | 1983-01-11 |
Family
ID=21820132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000348447A Expired CA1139068A (en) | 1979-03-27 | 1980-03-26 | Multisegmented filament spinning process |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4246219A (en) |
| JP (1) | JPS55132711A (en) |
| CA (1) | CA1139068A (en) |
| DE (1) | DE3011763A1 (en) |
| FR (1) | FR2452535A1 (en) |
| GB (1) | GB2045153A (en) |
| IT (1) | IT1131066B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55128016A (en) * | 1979-01-02 | 1980-10-03 | Monsanto Co | Conjugated yarn |
| US4357290A (en) * | 1979-12-31 | 1982-11-02 | Monsanto Company | Splittable conjugate yarn |
| EP0074446B1 (en) * | 1981-09-15 | 1985-05-22 | Monsanto Company | Multifilament yarn and spinning process therefor |
| EP0074445A1 (en) * | 1981-09-15 | 1983-03-23 | Monsanto Company | Spinning process and multifilament yarn |
| US4836763A (en) * | 1988-07-29 | 1989-06-06 | E. I. Dupont De Nemours And Company | Seven hole spinneret |
| US5783503A (en) * | 1996-07-22 | 1998-07-21 | Fiberweb North America, Inc. | Meltspun multicomponent thermoplastic continuous filaments, products made therefrom, and methods therefor |
| US6649671B2 (en) | 2000-03-13 | 2003-11-18 | Dow Global Technologies Inc. | Concrete and process to make same |
| WO2002000566A1 (en) | 2000-06-28 | 2002-01-03 | Dow Global Technologies Inc | Plastic fibers for improved concrete |
| CN104630933B (en) | 2013-11-13 | 2019-04-23 | 陶氏环球技术有限公司 | There is the bicomponent fibre of EVOH on surface for concrete enhancing |
| ES2729671T3 (en) * | 2015-05-20 | 2019-11-05 | Basf Se | Very thin tube made of TPU and its production process |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD61839A (en) * | ||||
| CH162131A (en) * | 1932-06-20 | 1933-06-15 | Tommasini & Cia S A V | Drawing mold for the production of pasta. |
| CH486570A (en) * | 1966-09-21 | 1970-02-28 | Inventa Ag | Device for the production of composite threads consisting of at least two different polymers |
| NL6802563A (en) * | 1967-02-25 | 1968-08-26 | ||
| US3802177A (en) * | 1968-09-13 | 1974-04-09 | Japan Exlan Co Ltd | Multi-colored textile products with sharp color tone contrasts |
| JPS4737207U (en) * | 1971-05-04 | 1972-12-25 | ||
| JPS581221B2 (en) * | 1974-12-12 | 1983-01-10 | 帝人株式会社 | Shikagawa henshiyokubutsuno |
| JPS55128016A (en) * | 1979-01-02 | 1980-10-03 | Monsanto Co | Conjugated yarn |
-
1979
- 1979-03-27 US US06/024,350 patent/US4246219A/en not_active Expired - Lifetime
-
1980
- 1980-03-26 DE DE19803011763 patent/DE3011763A1/en not_active Withdrawn
- 1980-03-26 IT IT20926/80A patent/IT1131066B/en active
- 1980-03-26 JP JP4010180A patent/JPS55132711A/en active Pending
- 1980-03-26 FR FR8006715A patent/FR2452535A1/en active Pending
- 1980-03-26 GB GB8010148A patent/GB2045153A/en not_active Withdrawn
- 1980-03-26 CA CA000348447A patent/CA1139068A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT1131066B (en) | 1986-06-18 |
| US4246219A (en) | 1981-01-20 |
| DE3011763A1 (en) | 1980-10-09 |
| FR2452535A1 (en) | 1980-10-24 |
| IT8020926A0 (en) | 1980-03-26 |
| GB2045153A (en) | 1980-10-29 |
| JPS55132711A (en) | 1980-10-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 20000111 |