US3924988A - Hollow filament spinneret - Google Patents
Hollow filament spinneret Download PDFInfo
- Publication number
- US3924988A US3924988A US256334A US25633472A US3924988A US 3924988 A US3924988 A US 3924988A US 256334 A US256334 A US 256334A US 25633472 A US25633472 A US 25633472A US 3924988 A US3924988 A US 3924988A
- Authority
- US
- United States
- Prior art keywords
- slots
- spinneret
- nozzle
- enlargements
- ratio
- 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
Links
Images
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
- D01D4/00—Spinnerette packs; Cleaning thereof
- D01D4/02—Spinnerettes
Definitions
- This invention relates to an improved spinneret for the production of hollow filaments.
- spinnerets with specially arranged arc-like slots can be used in the manufacture of synthetic filaments having a hollow core. Molten polymer forced through a slot forms a bulge and as a consequence of the bulging and the special arrangement, the polymer issuing at adjacent slot ends coalesces a short distance below the spinneret face. While spinnerets of the prior art function to produce hollow filaments, their use has led to open or ribbonized filaments after a relatively short period of operation.
- a spinneret plate provided with at least one nozzle, said nozzle being defined by a substantially symmetrical pattern of arcuate end-to-end slots interrupted by webs, the improvement comprising, said. slots having ends bearing inner inwardly tapered enlargements at the outer one-third portions thereof, the inner onethird portion of said slot being of substantially uniform width.
- FIGS. 1 and 2 has four arcuate orifices or slots 12 which are separated by webs l4 and otherwise surround a solid center portion 16.
- Each of slots 12 bear inner inwardly tapered enlargements 18 at their outer ends, these enlargements are within the area extending from the center of the nozzle bounding the outer onethird portions 12a of the slots.
- the inner one-third portion 12b of the slot is of substantially uniform width.
- FIG. 3 shows a cross section of a filament of the type produced by the nozzles illustrated in FIG. 1.
- the filament has a substantially circular core free of protuberances.
- the dotted lines indicate where polymer from adjacent segments has coalesced and similarly
- FIG. 5 illustrates a cross section of a filament produced by the nozzles shown in FIG. 4.
- FIG. 4 shows arcuate orifices having larger, blunttipped tapered enlargements 18' with corresponding one-third portions 12a, 12b.
- the arcuate orifices in FIGS. 1 and 4 have dimensions represented by letters a through g. Nominal values, in inches, for dimensions indicated are: a, 0.033; b, 0.004; c, 0.003; d, 0.0065; c, 0.007; f, 0.002 and g, 45.
- the spinnerets of the present invention willpreferablyhavenozzles with four slots 12 since four webs 16 provide good strength and are readily adaptable to the production of hollow filaments with a relatively smooth, nearcircular core.
- two, three, five or more segments may be used if desired.
- three-segment nozzles can be used to produce triangularly shaped cores.
- Such increases can leads-to the formationof-squarish holes and although suitable for spirally crimped filaments arising from nonuniform quenching, such filaments are not desired for use in stuffer-box crimping.
- the enlargements must begin at the ends of a slot and not extend beyond one third the length L of the slot.- The enlargements are also tapered inwardly into the center portion l6'of the spinning nozzle. Preferably, the enlargement will not protrude more than about 35% of the distance from the inner boundary to the center of portion 16.
- the tapering angle g should be less than and more than about 5. Preferably, 3 will be 20 to 60.
- the area ratio, o/I, wherein 0 equals the area in square mils, of an outer one-third portion (i.e., 12a or 12a) and I equals the area, in square mils, of the inner one-third portion (12b or 12b) should be at least 1.1 and preferably should not exceed about 1.5.
- the total area of the slot should not exceed 400 square mils.
- the area ratio should be from about 1.15 to about 1.40.
- a spinneret having 450 nozzles differing only in the presence of enlargements of the type shown in FIG. 1 with an area ratio of 1.16 produced hollow filaments (14% void) and no improperly coalesced filaments.
- the tapered enlargements must be at the inner portion of the segment.
- This particular structure causes a velocity differential to occur in polymer flow through the nozzle to set up force moments in the segments that favors coalescence.
- Such polymer velocity differential is indicated by the arrows in FIG. 2.
- the orifices are generally of symmetrical shape with all orifices in a nozzle being essentially the same. However, it is not necessary that all orifices be identical and variations may be introduced if desired, for instance, to produce unsymmetrical filaments.
- the inner boundary of the segment be the arc of a circle.
- Straight or curving lines may also serve to define the inner boundary but should not differ too greatly from a circular boundary because of changes in polymer distribution.
- the width of the web is preferably less than the width of the arcuate segment but widths less than about 0.002 inch should be avoided because of mechanical inadequacy.
- the spinneret of the present invention may be used to produce hollow filaments from any melt spinnable synthetic polymer exhibiting bulging during spinning and is particularly suitable for use with polyesters such as polyethylene terephthalate and its copolyesters'.
- a spinneret plate provided with at least one nozzle, for melt spinning filaments from molten polymers, said nozzle being defined by a substantially symmetrical pattern of four arcuate end-to-end slots interrupted by webs, said nozzle forming a filament having a single hollow core
- said slots having ends bearing inner inwardly-tapered enlargements at the outer one-third portions thereof, adjacent ends having proximate sides straight and parallel throughout their entire lengths, said slots having outer 4 boundaries, said outer boundaries being the arc of a circle, the inner one-third portion of said slot being of substantially uniform width, the ratio of the distance c between adjacent slots and the width b of the slots being less than'unity, said single hollow core being relatively smooth.
Abstract
A spinneret provided with a spinning nozzle having a plurality of arcuate segments whose ends bear inner, inwardly tapered enlargements at the outer one-third portions of the segments.
Description
United States Patent 1191 [1113 3,924,988
Hodge 5] Dec. 9, 1975 HOLLOW FILAMENT SPINNERET [75] Inventor: James Dwight Hodge, Greenville, [56] References Cited N.C. UNITED STATES PATENTS [73 Assignee; L Du Pom de Nemours & Co 3,313,000 4/1967 Hays 425/461 Wilmington ,323,168 6/1967 Van Drunen et a1 425/461 3,600,491 8/1971 Shimoda et a1. 425/3822 [22] Filed: May 24, 1972 3,772,137 11/1973 Batt 264/177 F UX [211 Appl. No.2 256,334
[44] Published under the Trial Voluntary Protest Program on January 28, 1975 as document no. [57] ABSTRACT B 256,334.
Primary ExaminerRobert D. Baldwin A spinneret provided with a spinning nozzle having a plurality of arcuate segments whose ends bear inner,
CCll 425/46 45 5/3433 inwardly tapered enlargements at the outer One-thi,d 58 Field of Search 425/461, 464, 466, 198, Pomons Ofthe Segments' 425/3822; 239/601; 264/176 F, 177 F 5 Claims, 5 Drawing Figures US. Patent Dec. 9, 1975 EEG FIGEI' FIG- FIG-
HOLLOW FILAMENT SPINNERET.
BACKGROUND OF THE INVENTION I This invention relates to an improved spinneret for the production of hollow filaments.
It is well known that spinnerets with specially arranged arc-like slots can be used in the manufacture of synthetic filaments having a hollow core. Molten polymer forced through a slot forms a bulge and as a consequence of the bulging and the special arrangement, the polymer issuing at adjacent slot ends coalesces a short distance below the spinneret face. While spinnerets of the prior art function to produce hollow filaments, their use has led to open or ribbonized filaments after a relatively short period of operation.
SUMMARY OF THE INVENTION In a spinneret plate provided with at least one nozzle, said nozzle being defined by a substantially symmetrical pattern of arcuate end-to-end slots interrupted by webs, the improvement comprising, said. slots having ends bearing inner inwardly tapered enlargements at the outer one-third portions thereof, the inner onethird portion of said slot being of substantially uniform width.
BRIEF DESCRIPTION OF THE DRAWINGS DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS Only one of the plurality of spinning nozzles usually provided in a spinneret plate has been shown. The nozzle in FIGS. 1 and 2 has four arcuate orifices or slots 12 which are separated by webs l4 and otherwise surround a solid center portion 16. Each of slots 12 bear inner inwardly tapered enlargements 18 at their outer ends, these enlargements are within the area extending from the center of the nozzle bounding the outer onethird portions 12a of the slots. The inner one-third portion 12b of the slot is of substantially uniform width.
FIG. 3 shows a cross section of a filament of the type produced by the nozzles illustrated in FIG. 1. The filament has a substantially circular core free of protuberances. The dotted lines indicate where polymer from adjacent segments has coalesced and similarly FIG. 5 illustrates a cross section of a filament produced by the nozzles shown in FIG. 4.
FIG. 4 shows arcuate orifices having larger, blunttipped tapered enlargements 18' with corresponding one-third portions 12a, 12b. The arcuate orifices in FIGS. 1 and 4 have dimensions represented by letters a through g. Nominal values, in inches, for dimensions indicated are: a, 0.033; b, 0.004; c, 0.003; d, 0.0065; c, 0.007; f, 0.002 and g, 45.
The spinnerets of the present invention willpreferablyhavenozzles with four slots 12 since four webs 16 provide good strength and are readily adaptable to the production of hollow filaments with a relatively smooth, nearcircular core. However, two, three, five or more segments may be used if desired. For example, three-segment nozzles can be used to produce triangularly shaped cores. In some instances, for example, when relatively high-velocity cooling air. is used; to quench the molten polymer near the spinneret face, it maybe desirable to increase the amount of polymer?v in the vicinity of the point of coalescence by increasing the size of the enlargements. Such increases can leads-to the formationof-squarish holes and although suitable for spirally crimped filaments arising from nonuniform quenching, such filaments are not desired for use in stuffer-box crimping.
The enlargements must begin at the ends of a slot and not extend beyond one third the length L of the slot.- The enlargements are also tapered inwardly into the center portion l6'of the spinning nozzle. Preferably, the enlargement will not protrude more than about 35% of the distance from the inner boundary to the center of portion 16. The tapering angle g should be less than and more than about 5. Preferably, 3 will be 20 to 60. The area ratio, o/I, wherein 0 equals the area in square mils, of an outer one-third portion (i.e., 12a or 12a) and I equals the area, in square mils, of the inner one-third portion (12b or 12b) should be at least 1.1 and preferably should not exceed about 1.5. In addition, the total area of the slot should not exceed 400 square mils. Preferably, the area ratio should be from about 1.15 to about 1.40.
A spinneret having 450 nozzles similar to those of FIG. 1 but without the enlargements, having an area ratio of about 1.0, was used to make hollow filaments and in periodical determinations was found to produce hollow filaments (17% void) with up to 20 improperly coalesced filaments. Under identical conditions, a spinneret having 450 nozzles differing only in the presence of enlargements of the type shown in FIG. 1 with an area ratio of 1.16 produced hollow filaments (14% void) and no improperly coalesced filaments.
In the spinnerets of this invention, the tapered enlargements must be at the inner portion of the segment. This particular structure causes a velocity differential to occur in polymer flow through the nozzle to set up force moments in the segments that favors coalescence. Such polymer velocity differential is indicated by the arrows in FIG. 2.
The orifices are generally of symmetrical shape with all orifices in a nozzle being essentially the same. However, it is not necessary that all orifices be identical and variations may be introduced if desired, for instance, to produce unsymmetrical filaments.
It is not essential that the inner boundary of the segment be the arc of a circle. Straight or curving lines may also serve to define the inner boundary but should not differ too greatly from a circular boundary because of changes in polymer distribution. In the practice of the present invention, the width of the web is preferably less than the width of the arcuate segment but widths less than about 0.002 inch should be avoided because of mechanical inadequacy.
It has been found in practice that the viscosity of the molten polymer varies more than the other factors and when the coalescence performance is borderline, dayto-day variations in viscosity can lead to continuing interruptions of the process. The spinnerets of the present invention are less sensitive to fluctuations in viscosity and have been much more effective in producing hollow filaments having a low denier per filament.
The spinneret of the present invention may be used to produce hollow filaments from any melt spinnable synthetic polymer exhibiting bulging during spinning and is particularly suitable for use with polyesters such as polyethylene terephthalate and its copolyesters'.
What is claimed is:
1. In a spinneret plate provided with at least one nozzle, for melt spinning filaments from molten polymers, said nozzle being defined by a substantially symmetrical pattern of four arcuate end-to-end slots interrupted by webs, said nozzle forming a filament having a single hollow core the improvement comprising, said slots having ends bearing inner inwardly-tapered enlargements at the outer one-third portions thereof, adjacent ends having proximate sides straight and parallel throughout their entire lengths, said slots having outer 4 boundaries, said outer boundaries being the arc of a circle, the inner one-third portion of said slot being of substantially uniform width, the ratio of the distance c between adjacent slots and the width b of the slots being less than'unity, said single hollow core being relatively smooth.
2. The spinneret plate as defined in claim 1, the ratio of the area of an outer one-third portion to the area of the inner one-third portion being in the range of from about 1.15 to about 1.40.
3. The spinneret plate as defined in claim 2, said ratio being 1.16.
4. The spinneret as defined in claim 1, said enlargements being inwardly tapered at an angle with respect to the end of the slot of less than and more than about 5.
5. The spinneret as defined in claim 4, said angle being between 20 to 60.
Claims (5)
1. In a spinneret plate provided with at least one nozzle, for melt spinning filaments from molten polymers, said nozzle being defined by a substantially symmetrical pattern of four arcuate end-to-end slots interrupted by webs, said nozzle forming a filament having a single hollow core the improvement comprising, said slots having ends bearing inner inwardly-tapered enlargements at the outer one-third portions thereof, adjacent ends having proximate sides straight and parallel throughout their entire lengths, said slots having outer boundaries, said outer boundaries being the arc of a circle, the inner one-third portion of said slot being of substantially uniform width, the ratio of the distance c between adjacent slots and the width b of the slots being less than unity, said single hollow core being relatively smooth.
2. The spinneret plate as defined in claim 1, the ratio of the area of an outer one-third portion to the area of the inner one-third portion being in the range of from about 1.15 to about 1.40.
3. The spinneret plate as defined in claim 2, said ratio being 1.16.
4. The spinneret as defined in claim 1, said enlargements being inwardly tapered at an angle with respect to the end of the slot of less than 80* and more than about 5*.
5. The spinneret as defined in claim 4, said angle being between 20* to 60* .
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US256334A US3924988A (en) | 1972-05-24 | 1972-05-24 | Hollow filament spinneret |
JP48056427A JPS4941625A (en) | 1972-05-24 | 1973-05-22 | |
IT24482/73A IT1003083B (en) | 1972-05-24 | 1973-05-23 | APPARATUS FOR MELTED SPINNING OF HOLLOW POLYMERO FILAMENTS |
NL7307219A NL7307219A (en) | 1972-05-24 | 1973-05-23 | |
FR7318732A FR2185697B1 (en) | 1972-05-24 | 1973-05-23 | |
GB2496373A GB1412715A (en) | 1972-05-24 | 1973-05-24 | Spinneret nozzles |
DE19732326588 DE2326588B2 (en) | 1972-05-24 | 1973-05-24 | SPINNER NOZZLE PLATE FOR THE PRODUCTION OF HOLLOW THREADS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US256334A US3924988A (en) | 1972-05-24 | 1972-05-24 | Hollow filament spinneret |
Publications (2)
Publication Number | Publication Date |
---|---|
USB256334I5 USB256334I5 (en) | 1975-01-28 |
US3924988A true US3924988A (en) | 1975-12-09 |
Family
ID=22971860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US256334A Expired - Lifetime US3924988A (en) | 1972-05-24 | 1972-05-24 | Hollow filament spinneret |
Country Status (7)
Country | Link |
---|---|
US (1) | US3924988A (en) |
JP (1) | JPS4941625A (en) |
DE (1) | DE2326588B2 (en) |
FR (1) | FR2185697B1 (en) |
GB (1) | GB1412715A (en) |
IT (1) | IT1003083B (en) |
NL (1) | NL7307219A (en) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4163641A (en) * | 1977-09-20 | 1979-08-07 | Societe Lignes Telegraphiques Et Telephoniques | Extrusion tool |
US4376746A (en) * | 1980-04-01 | 1983-03-15 | Ametek, Inc. | Formation of hollow tapered brush bristles |
US4407889A (en) * | 1982-02-19 | 1983-10-04 | E. I. Du Pont De Nemours And Company | Splittable hollow polyester filament |
US4444710A (en) * | 1982-02-19 | 1984-04-24 | E. I. Du Pont De Nemours And Company | Process for increasing void volume of hollow filaments |
US5125818A (en) * | 1991-02-05 | 1992-06-30 | Basf Corporation | Spinnerette for producing bi-component trilobal filaments |
US5129812A (en) * | 1991-03-28 | 1992-07-14 | Basf Corporation | Multiple profile filaments from a single counterbore |
US5277976A (en) * | 1991-10-07 | 1994-01-11 | Minnesota Mining And Manufacturing Company | Oriented profile fibers |
US5330348A (en) * | 1992-08-05 | 1994-07-19 | E. I. Du Pont De Nemours And Company | Spinneret for the production of hollow filaments |
US5439626A (en) * | 1994-03-14 | 1995-08-08 | E. I. Du Pont De Nemours And Company | Process for making hollow nylon filaments |
US20030118763A1 (en) * | 2001-05-08 | 2003-06-26 | Travelute Frederick L. | Method and apparatus for high denier hollow spiral fiber |
US20050147788A1 (en) * | 2003-11-19 | 2005-07-07 | Invista North America S.A R.L. | Spinneret plate for producing a bulked continuous filament having a three-sided exterior cross-section and a convex six-sided central void |
US20070169550A1 (en) * | 2006-01-26 | 2007-07-26 | Lally Robert W | Educational accelerometer |
US20110291318A1 (en) * | 2008-05-16 | 2011-12-01 | Gala Industries, Inc. | Method and device for extrusion of hollow pellets |
US20150001758A1 (en) * | 2008-05-16 | 2015-01-01 | Gala Industries, Inc. | Method and device for extrusion of hollow pellets |
KR102159212B1 (en) * | 2019-04-22 | 2020-09-23 | 주식회사 휴비스 | Spinneret for Hollow Fiber and A method for preparingHollow fiber using the same |
KR102183244B1 (en) * | 2019-06-20 | 2020-11-26 | 주식회사 휴비스 | Hollow Fiber Yarn Excellent In Thermal Insulation Using Spinneret For Hollow Fiber |
KR102183243B1 (en) * | 2019-06-20 | 2020-11-26 | 주식회사 휴비스 | Hollow Fiber Yarn Excellent In Sound Absorption Using Spinneret For Hollow Fiber |
KR20210146147A (en) * | 2020-05-26 | 2021-12-03 | 주식회사 휴비스 | Filler With Excellent Bulkiness and Excellent Heat Retention, Including Two Types Of Hollow Composite Yarn |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51143711A (en) * | 1975-06-04 | 1976-12-10 | Kuraray Co Ltd | A nozzle for hollow fibers |
JPS58169507A (en) * | 1982-03-26 | 1983-10-06 | Tanaka Kikinzoku Kogyo Kk | Spinneret for hollow fiber |
JPH0514166U (en) * | 1991-07-31 | 1993-02-23 | 帝人株式会社 | Spinneret for hollow fibers |
JP3866843B2 (en) * | 1997-11-17 | 2007-01-10 | 帝人ファイバー株式会社 | Spinneret for hollow fiber |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3313000A (en) * | 1965-07-13 | 1967-04-11 | Du Pont | Spinneret plate |
US3323168A (en) * | 1962-05-24 | 1967-06-06 | American Enka Corp | Spinneret for spinning hollow filaments |
US3600491A (en) * | 1968-02-14 | 1971-08-17 | Japan Exlan Co Ltd | Production of hollow acrylic fibers |
US3772137A (en) * | 1968-09-30 | 1973-11-13 | Du Pont | Polyester pillow batt |
-
1972
- 1972-05-24 US US256334A patent/US3924988A/en not_active Expired - Lifetime
-
1973
- 1973-05-22 JP JP48056427A patent/JPS4941625A/ja active Pending
- 1973-05-23 NL NL7307219A patent/NL7307219A/xx unknown
- 1973-05-23 FR FR7318732A patent/FR2185697B1/fr not_active Expired
- 1973-05-23 IT IT24482/73A patent/IT1003083B/en active
- 1973-05-24 DE DE19732326588 patent/DE2326588B2/en active Pending
- 1973-05-24 GB GB2496373A patent/GB1412715A/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3323168A (en) * | 1962-05-24 | 1967-06-06 | American Enka Corp | Spinneret for spinning hollow filaments |
US3313000A (en) * | 1965-07-13 | 1967-04-11 | Du Pont | Spinneret plate |
US3600491A (en) * | 1968-02-14 | 1971-08-17 | Japan Exlan Co Ltd | Production of hollow acrylic fibers |
US3772137A (en) * | 1968-09-30 | 1973-11-13 | Du Pont | Polyester pillow batt |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4163641A (en) * | 1977-09-20 | 1979-08-07 | Societe Lignes Telegraphiques Et Telephoniques | Extrusion tool |
US4376746A (en) * | 1980-04-01 | 1983-03-15 | Ametek, Inc. | Formation of hollow tapered brush bristles |
US4407889A (en) * | 1982-02-19 | 1983-10-04 | E. I. Du Pont De Nemours And Company | Splittable hollow polyester filament |
US4444710A (en) * | 1982-02-19 | 1984-04-24 | E. I. Du Pont De Nemours And Company | Process for increasing void volume of hollow filaments |
US5125818A (en) * | 1991-02-05 | 1992-06-30 | Basf Corporation | Spinnerette for producing bi-component trilobal filaments |
US5129812A (en) * | 1991-03-28 | 1992-07-14 | Basf Corporation | Multiple profile filaments from a single counterbore |
US5277976A (en) * | 1991-10-07 | 1994-01-11 | Minnesota Mining And Manufacturing Company | Oriented profile fibers |
US5330348A (en) * | 1992-08-05 | 1994-07-19 | E. I. Du Pont De Nemours And Company | Spinneret for the production of hollow filaments |
US5439626A (en) * | 1994-03-14 | 1995-08-08 | E. I. Du Pont De Nemours And Company | Process for making hollow nylon filaments |
US5604036A (en) * | 1994-03-14 | 1997-02-18 | E. I. Du Pont De Nemours And Company | Hollow nylon filaments |
US5643660A (en) * | 1994-03-14 | 1997-07-01 | E. I. Du Pont De Nemours And Company | Hollow nylon filaments and yarns |
US20050037196A1 (en) * | 2001-05-08 | 2005-02-17 | Travelute Frederick L. | Method and apparatus for high denier hollow spiral fiber |
US20070231519A1 (en) * | 2001-05-08 | 2007-10-04 | Wellman, Inc. | Method and Apparatus for High Denier Hollow Spiral Fiber |
US6797209B2 (en) | 2001-05-08 | 2004-09-28 | Wellman, Inc. | Method and apparatus for high denier hollow spiral fiber |
US20030118763A1 (en) * | 2001-05-08 | 2003-06-26 | Travelute Frederick L. | Method and apparatus for high denier hollow spiral fiber |
US6746230B2 (en) | 2001-05-08 | 2004-06-08 | Wellman, Inc. | Apparatus for high denier hollow spiral fiber |
US20060014015A1 (en) * | 2001-05-08 | 2006-01-19 | Travelute Frederick L | Method and apparatus for high denier hollow spiral fiber |
US7001664B2 (en) | 2001-05-08 | 2006-02-21 | Wellman, Inc. | Method and apparatus for high denier hollow spiral fiber |
US7229688B2 (en) | 2001-05-08 | 2007-06-12 | Wellman, Inc. | Method and apparatus for high denier hollow spiral fiber |
US20050147788A1 (en) * | 2003-11-19 | 2005-07-07 | Invista North America S.A R.L. | Spinneret plate for producing a bulked continuous filament having a three-sided exterior cross-section and a convex six-sided central void |
US20070169550A1 (en) * | 2006-01-26 | 2007-07-26 | Lally Robert W | Educational accelerometer |
US20110291318A1 (en) * | 2008-05-16 | 2011-12-01 | Gala Industries, Inc. | Method and device for extrusion of hollow pellets |
US8834760B2 (en) * | 2008-05-16 | 2014-09-16 | Gala Industries, Inc. | Method and device for extrusion of hollow pellets |
US20150001758A1 (en) * | 2008-05-16 | 2015-01-01 | Gala Industries, Inc. | Method and device for extrusion of hollow pellets |
US9815223B2 (en) * | 2008-05-16 | 2017-11-14 | Gala Industries, Inc. | Method and device for extrusion of hollow pellets |
KR102159212B1 (en) * | 2019-04-22 | 2020-09-23 | 주식회사 휴비스 | Spinneret for Hollow Fiber and A method for preparingHollow fiber using the same |
KR102183244B1 (en) * | 2019-06-20 | 2020-11-26 | 주식회사 휴비스 | Hollow Fiber Yarn Excellent In Thermal Insulation Using Spinneret For Hollow Fiber |
KR102183243B1 (en) * | 2019-06-20 | 2020-11-26 | 주식회사 휴비스 | Hollow Fiber Yarn Excellent In Sound Absorption Using Spinneret For Hollow Fiber |
KR20210146147A (en) * | 2020-05-26 | 2021-12-03 | 주식회사 휴비스 | Filler With Excellent Bulkiness and Excellent Heat Retention, Including Two Types Of Hollow Composite Yarn |
KR102347840B1 (en) | 2020-05-26 | 2022-01-07 | 주식회사 휴비스 | Filler With Excellent Bulkiness and Excellent Heat Retention, Including Two Types Of Hollow Composite Yarn |
Also Published As
Publication number | Publication date |
---|---|
IT1003083B (en) | 1976-06-10 |
USB256334I5 (en) | 1975-01-28 |
DE2326588B2 (en) | 1976-09-16 |
FR2185697B1 (en) | 1976-04-23 |
JPS4941625A (en) | 1974-04-19 |
FR2185697A1 (en) | 1974-01-04 |
GB1412715A (en) | 1975-11-05 |
DE2326588A1 (en) | 1973-11-29 |
NL7307219A (en) | 1973-11-27 |
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