CA1252968A - Spinneret - Google Patents
SpinneretInfo
- Publication number
- CA1252968A CA1252968A CA000495366A CA495366A CA1252968A CA 1252968 A CA1252968 A CA 1252968A CA 000495366 A CA000495366 A CA 000495366A CA 495366 A CA495366 A CA 495366A CA 1252968 A CA1252968 A CA 1252968A
- Authority
- CA
- Canada
- Prior art keywords
- spinneret
- orifices
- group
- groups
- outer ring
- 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
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/70—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyurethanes
-
- 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
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)
Abstract
TITLE
SPINNERET
ABSTRACT
The conventional spandex spinneret has two rings of equally spaced grouped orifices, each filament being formed by coalescence of the extrudate from the grouped orifices. A spandex spinneret having the holes of the orifices of each group of the outer ring of groupfs more closely spaced than those of the inner ring of groups has eliminated the power differences between inner and outer threadlines. The closer spacing within each group of the outer ring of groups also increases the spacing between groups, thereby reducing filament migration.
SPINNERET
ABSTRACT
The conventional spandex spinneret has two rings of equally spaced grouped orifices, each filament being formed by coalescence of the extrudate from the grouped orifices. A spandex spinneret having the holes of the orifices of each group of the outer ring of groupfs more closely spaced than those of the inner ring of groups has eliminated the power differences between inner and outer threadlines. The closer spacing within each group of the outer ring of groups also increases the spacing between groups, thereby reducing filament migration.
Description
J
TITLE
SPINNERET
BACKGROUND OF THE INVENTION
This invention relates to composite textile yarns. More particularly it relates to coalesced multifilament yarn, especially spandex yarn and to a spinneret for obtaining such a yarn.
Smith U.S. Patent No. 3,094,374 and Hunt U.S.
Patent No. 3,428,711 describe methods for prepring coalesced spandex filaments. In a preferred embodiment described by Smith the yarns contain individual filaments which adhere to one another to form a unitary group of filaments. The Hunt patent which discloses a preferred process for making the filaments in Examples I and II.
The conventional spinnerets used for light denier spandex production have two rings, i.e. an outer ring and an inner ring of grouped orifices wherein each group is composed of four holes. The spacing between holes of each grouping is the same regardless of whether the group is in the inner or outer ring.
Higher spinning productivity has been achieved by increasing the number of groups of filaments per spinning cell. The greater number of groups increases the frequency of filament migration between groups and magnifies differences in drying environment between inner and outer groups. This results in different power levels that adversely influence yarn and fabric appearance.
SUMMARY OF THE INVENTION
A new spinnPret wherein the orifice spacing of the groupings of the outer ring is substantially less than those of the inner ring has been shown to , essentially eliminate power differences between group6. Further, filament migration i6 reduced thereby increasing yields.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 ~how~ a plan view of a prior art spinneret used for ~pandex production.
~IG. 2 ~how6 a plan view o a preferred embodiment of the 6pinneret of ~his invention for 6pandex production.
DETAILED DESCRIPTION OF THE INVENTION
Referring no~ to PIG. 1, the prior art 6pinneret 10 chosen for purpose6 of illustration includes a plate 12 having an outer ring 14 and an inner ring 16 of grouped otifice~ 14a~ 16a respectively with each individual orifice in the groups in the outer ring and inner ring de~ignated by the number& 18 and 20 re6pec~ively. The peripheral and radial distan~es d between orifice6 of each group l~a, 16a in the ou~er and inner ring~ 14, 16 ale the 6ame for both outer and inner ring group6.
By compari60n, the spinneret of this invention i~ 6hown in FIG. 2 wherein like numeral6 for like element6 are used. More particularly, the ~pinneret 10' include6 a plate 12l having an outer ring 14' and an inner ring 16' of gcoup~ of orifice6 14a', 16a'. A~ before, each individual orifice is desiqnated lB' and 20' in the outer and inner ring~, re~pectively. The peripheral distance dl and the radial di6tance d2 between the orifice6 in the group6 14~ i~ the outer ring 14' of group~ are ~he 6ame for each group in the outer ring. In the preferred embodiment ~hown, dl i6 greater ~han d2. ~owever, each of the distance~ dl, d2 are le6s than the di~tance d3 between the orifice~ in the qroup6 16a'.
~s~
While the preferred embodiment shows dl to be greater than d~, a spinneret with dl equal to d2 or dl less than d2 will perform as well.
In addition, while the preferred embodiment shows four orifices in each group, three orifices in each group will work as well p~oviding the di~tance between orifices in the groups in the outer ring of groups is less than the distance between orifices in the groups in the inner ring of groups.
LOAD POWER TEST DESCRIPTION
Load power (T300) is stress at 300t elo~gation. Fi~e sample~ o~ Epandex yarn each 5"
long, are tested at 2" gauge length u6ing an Instron~
tensile tester at 1000~ per minute strain rate. The value in grams (g) of the stress at 300S elongation is reported as load po~er.
The spinneret described in connection with FIG. Z has been shown to essentially eliminate load power differences between threadline6 or coaleficed groupfi of filament~.
A 6pandex spinning ~olution, prepared as de6cribed in Example6 I and II of U.S. Pa~ent No.
3,428,711, was extruded ~hrough a 64-hole spinneret to form 16 coale6ced threadlines. The arrangement of holes in the spinneret is shown in FIG. 2. ~ithin each quadrant of the spinneret, there are fuur groups of orifice6, each group made up of four holes. Theee of ehe groups are loca~ed equidi6tant from the center of the spi~neret so a~ to form an outer ring, the remaining group is located between the center and the outer ring. Within each group of orifices of the outer ring, the four holes are spaced approximately 0.20~' (5.1 mm) from each other. The hole 6pacing for the orifices of the inner group is 0.39" (9.~ mm~.
The ~pinning solution was extruded at a rate of 6.2 pph and wound up at about 730 mpm to yield ~ixteen 40 denier fiber~. each fiber formed from 4 coale6ced 10 denier filament~. Of the sixteen fiber6. twelve are designated outer ring fiber~. four are inner ring fiber~.
The load power (T300), for inner and outer ring fibers i~ gi~en in Table 1 in compari~on to those of a product from a prior art ~pinneret of Example 2.
E~AM~LE 2 Example 1 wa~ repeated u6ing a prior art 6pinneret a~ 6hown in FIG. 1. Thi~ 6pinneret ha~ 64 hole6. arcanged in ~ixteen qroup6 of four hole6.
Twelve of the group6 form the outer ring, four group~
form the inner ring. ~he 6pacing between the orifices of each group i~ 0.39" (9.9 mm) for both outer and inner ring group~.
The load power for inner and outer ri~g fiber6 are gi~en in Table l.
TABI.E 1 E~xample 1 Examp le 2 Load Power (T300~ g.
Inner 15 . B9 l S . 77 Out~r 15.90 16.39 Difference, % 0.06 4.0 A 24-thread, 40 denier ~pandex fiber was produced u6ing~a 96-hole 6pinneret. The 96 holes are divided among 24 grouping~, each group ha~ing 4 hole~. There are 16 outer grouping~ and 8 inner qroupings. Hole-to-hole 6pacing i6 0.32" for both inner and outer threadline6. Solution wa~ fed at a rate of 10.0 pph and fiber wound up at about 814 mpm.
The outer threadline load power ~T300) i~
16.39 g, the inner threadline retractive load power (T300) i6 15.94 g, a diffeeence of 0.45 g.
Example 3 ~a~ repeated u~ing a 96-hole ~pinneret of thi~ invention wherein the ou~er hole 6pacing wafi 0.20~ and the inner hole ~pacing was 0.35l-.
Outer threadline load power (T300~ was 10 lS.89 g. inne~ ehreadline load power is 16.94 g. The O.OS g diffe~ence in ~h~eadline retractive load power (~300~ n order of ~agnitude i~prove~ent o~er the ~iber of ~ample 3.
~5
TITLE
SPINNERET
BACKGROUND OF THE INVENTION
This invention relates to composite textile yarns. More particularly it relates to coalesced multifilament yarn, especially spandex yarn and to a spinneret for obtaining such a yarn.
Smith U.S. Patent No. 3,094,374 and Hunt U.S.
Patent No. 3,428,711 describe methods for prepring coalesced spandex filaments. In a preferred embodiment described by Smith the yarns contain individual filaments which adhere to one another to form a unitary group of filaments. The Hunt patent which discloses a preferred process for making the filaments in Examples I and II.
The conventional spinnerets used for light denier spandex production have two rings, i.e. an outer ring and an inner ring of grouped orifices wherein each group is composed of four holes. The spacing between holes of each grouping is the same regardless of whether the group is in the inner or outer ring.
Higher spinning productivity has been achieved by increasing the number of groups of filaments per spinning cell. The greater number of groups increases the frequency of filament migration between groups and magnifies differences in drying environment between inner and outer groups. This results in different power levels that adversely influence yarn and fabric appearance.
SUMMARY OF THE INVENTION
A new spinnPret wherein the orifice spacing of the groupings of the outer ring is substantially less than those of the inner ring has been shown to , essentially eliminate power differences between group6. Further, filament migration i6 reduced thereby increasing yields.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 ~how~ a plan view of a prior art spinneret used for ~pandex production.
~IG. 2 ~how6 a plan view o a preferred embodiment of the 6pinneret of ~his invention for 6pandex production.
DETAILED DESCRIPTION OF THE INVENTION
Referring no~ to PIG. 1, the prior art 6pinneret 10 chosen for purpose6 of illustration includes a plate 12 having an outer ring 14 and an inner ring 16 of grouped otifice~ 14a~ 16a respectively with each individual orifice in the groups in the outer ring and inner ring de~ignated by the number& 18 and 20 re6pec~ively. The peripheral and radial distan~es d between orifice6 of each group l~a, 16a in the ou~er and inner ring~ 14, 16 ale the 6ame for both outer and inner ring group6.
By compari60n, the spinneret of this invention i~ 6hown in FIG. 2 wherein like numeral6 for like element6 are used. More particularly, the ~pinneret 10' include6 a plate 12l having an outer ring 14' and an inner ring 16' of gcoup~ of orifice6 14a', 16a'. A~ before, each individual orifice is desiqnated lB' and 20' in the outer and inner ring~, re~pectively. The peripheral distance dl and the radial di6tance d2 between the orifice6 in the group6 14~ i~ the outer ring 14' of group~ are ~he 6ame for each group in the outer ring. In the preferred embodiment ~hown, dl i6 greater ~han d2. ~owever, each of the distance~ dl, d2 are le6s than the di~tance d3 between the orifice~ in the qroup6 16a'.
~s~
While the preferred embodiment shows dl to be greater than d~, a spinneret with dl equal to d2 or dl less than d2 will perform as well.
In addition, while the preferred embodiment shows four orifices in each group, three orifices in each group will work as well p~oviding the di~tance between orifices in the groups in the outer ring of groups is less than the distance between orifices in the groups in the inner ring of groups.
LOAD POWER TEST DESCRIPTION
Load power (T300) is stress at 300t elo~gation. Fi~e sample~ o~ Epandex yarn each 5"
long, are tested at 2" gauge length u6ing an Instron~
tensile tester at 1000~ per minute strain rate. The value in grams (g) of the stress at 300S elongation is reported as load po~er.
The spinneret described in connection with FIG. Z has been shown to essentially eliminate load power differences between threadline6 or coaleficed groupfi of filament~.
A 6pandex spinning ~olution, prepared as de6cribed in Example6 I and II of U.S. Pa~ent No.
3,428,711, was extruded ~hrough a 64-hole spinneret to form 16 coale6ced threadlines. The arrangement of holes in the spinneret is shown in FIG. 2. ~ithin each quadrant of the spinneret, there are fuur groups of orifice6, each group made up of four holes. Theee of ehe groups are loca~ed equidi6tant from the center of the spi~neret so a~ to form an outer ring, the remaining group is located between the center and the outer ring. Within each group of orifices of the outer ring, the four holes are spaced approximately 0.20~' (5.1 mm) from each other. The hole 6pacing for the orifices of the inner group is 0.39" (9.~ mm~.
The ~pinning solution was extruded at a rate of 6.2 pph and wound up at about 730 mpm to yield ~ixteen 40 denier fiber~. each fiber formed from 4 coale6ced 10 denier filament~. Of the sixteen fiber6. twelve are designated outer ring fiber~. four are inner ring fiber~.
The load power (T300), for inner and outer ring fibers i~ gi~en in Table 1 in compari~on to those of a product from a prior art ~pinneret of Example 2.
E~AM~LE 2 Example 1 wa~ repeated u6ing a prior art 6pinneret a~ 6hown in FIG. 1. Thi~ 6pinneret ha~ 64 hole6. arcanged in ~ixteen qroup6 of four hole6.
Twelve of the group6 form the outer ring, four group~
form the inner ring. ~he 6pacing between the orifices of each group i~ 0.39" (9.9 mm) for both outer and inner ring group~.
The load power for inner and outer ri~g fiber6 are gi~en in Table l.
TABI.E 1 E~xample 1 Examp le 2 Load Power (T300~ g.
Inner 15 . B9 l S . 77 Out~r 15.90 16.39 Difference, % 0.06 4.0 A 24-thread, 40 denier ~pandex fiber was produced u6ing~a 96-hole 6pinneret. The 96 holes are divided among 24 grouping~, each group ha~ing 4 hole~. There are 16 outer grouping~ and 8 inner qroupings. Hole-to-hole 6pacing i6 0.32" for both inner and outer threadline6. Solution wa~ fed at a rate of 10.0 pph and fiber wound up at about 814 mpm.
The outer threadline load power ~T300) i~
16.39 g, the inner threadline retractive load power (T300) i6 15.94 g, a diffeeence of 0.45 g.
Example 3 ~a~ repeated u~ing a 96-hole ~pinneret of thi~ invention wherein the ou~er hole 6pacing wafi 0.20~ and the inner hole ~pacing was 0.35l-.
Outer threadline load power (T300~ was 10 lS.89 g. inne~ ehreadline load power is 16.94 g. The O.OS g diffe~ence in ~h~eadline retractive load power (~300~ n order of ~agnitude i~prove~ent o~er the ~iber of ~ample 3.
~5
Claims (7)
1. A spinneret for the production of spandex filaments comprising a plate having an outer ring and an inner ring of grouped orifices, each group being comprised of a plurality of orifices spaced from each other, characterized in that the distance between orifices in each group in the outer ring of groups being less than the distance between the orifices in each group in the inner ring of groups.
2. The spinneret of claim 1, there being four groups of orifices in the inner ring of groups and twelve groups of orifices in the outer ring of groups.
3. The spinneret of claim 2, there being four orifices in each group.
4. The spinneret of claim 1, there being four orifices in each group, the distances between orifices in each group in the outer ring being defined as peripheral and radial distances.
5. The spinneret of claim 4, said peripheral distances being greater than said radial distances.
6. The spinneret of claim 4, said peripheral distances being equal to said radial distances.
7. The spinneret of claim 4, said peripheral distances being less than said radial distances.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US67192084A | 1984-11-15 | 1984-11-15 | |
| US671,920 | 1984-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1252968A true CA1252968A (en) | 1989-04-25 |
Family
ID=24696426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000495366A Expired CA1252968A (en) | 1984-11-15 | 1985-11-14 | Spinneret |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0182615B1 (en) |
| JP (1) | JPS61119706A (en) |
| KR (1) | KR860004174A (en) |
| BR (1) | BR8505705A (en) |
| CA (1) | CA1252968A (en) |
| DE (1) | DE3578741D1 (en) |
| MX (1) | MX162605A (en) |
| SU (1) | SU1438617A3 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5723080A (en) * | 1995-07-27 | 1998-03-03 | Bayer Faser Gmbh | Process for producing splittable elastane yarns |
| JPH1046432A (en) * | 1996-07-24 | 1998-02-17 | Du Pont Toray Co Ltd | Dry spinning of polyurethane yarn |
| US6214145B1 (en) | 1996-07-24 | 2001-04-10 | Dupont Toray Co., Ltd. | Coalesced multifilament spandex and method for its preparation |
| KR100460137B1 (en) * | 2002-10-09 | 2004-12-03 | 태광산업주식회사 | Improved spinneret, dry-spinning spandex and method for its preperation using improved spinneret |
| US20190284721A1 (en) | 2016-05-20 | 2019-09-19 | A&At Llc | Non-round solution spun spandex filaments and methods and devices for production thereof |
| CN107794581A (en) * | 2017-12-14 | 2018-03-13 | 江苏恒力化纤股份有限公司 | Composite spinneret |
| US20240318355A1 (en) * | 2023-03-20 | 2024-09-26 | Bright Cheers International Limited | Polyurethane fiber and spinneret therefor and manufacturing method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE876135C (en) * | 1944-02-26 | 1953-05-11 | Degussa | Spinneret for the production of synthetic threads or rayon |
| NL280787A (en) * | 1961-07-11 | |||
| FR1478798A (en) * | 1965-05-04 | 1967-04-28 | Du Pont | Multifilament welded yarn and method of preparing such yarn |
-
1985
- 1985-11-12 BR BR8505705A patent/BR8505705A/en not_active IP Right Cessation
- 1985-11-14 SU SU853973846A patent/SU1438617A3/en active
- 1985-11-14 JP JP60253878A patent/JPS61119706A/en active Pending
- 1985-11-14 MX MX607A patent/MX162605A/en unknown
- 1985-11-14 KR KR1019850008522A patent/KR860004174A/en not_active Application Discontinuation
- 1985-11-14 CA CA000495366A patent/CA1252968A/en not_active Expired
- 1985-11-14 EP EP85308296A patent/EP0182615B1/en not_active Expired - Lifetime
- 1985-11-14 DE DE8585308296T patent/DE3578741D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| BR8505705A (en) | 1986-08-12 |
| SU1438617A3 (en) | 1988-11-15 |
| JPS61119706A (en) | 1986-06-06 |
| EP0182615A2 (en) | 1986-05-28 |
| DE3578741D1 (en) | 1990-08-23 |
| MX162605A (en) | 1991-05-31 |
| KR860004174A (en) | 1986-06-18 |
| EP0182615B1 (en) | 1990-07-18 |
| EP0182615A3 (en) | 1988-03-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |