US3792944A - Spinneret for composite spinning - Google Patents

Spinneret for composite spinning Download PDF

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Publication number
US3792944A
US3792944A US00158484A US3792944DA US3792944A US 3792944 A US3792944 A US 3792944A US 00158484 A US00158484 A US 00158484A US 3792944D A US3792944D A US 3792944DA US 3792944 A US3792944 A US 3792944A
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US
United States
Prior art keywords
spinneret
extrusion
capillary
capillaries
introduction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00158484A
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English (en)
Inventor
K Chimura
T Kaneko
K Sakunaga
T Mukai
R Nakazono
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Chemical Corp
Original Assignee
Mitsubishi Rayon Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP6343270A external-priority patent/JPS4816446B1/ja
Priority claimed from JP7643870A external-priority patent/JPS4816447B1/ja
Application filed by Mitsubishi Rayon Co Ltd filed Critical Mitsubishi Rayon Co Ltd
Application granted granted Critical
Publication of US3792944A publication Critical patent/US3792944A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • D01D5/32—Side-by-side structure; Spinnerette packs therefor

Definitions

  • One method involves adding a third component to one of the two polymers to control melt viscosities and thereby to decrease the difference in extrusion linear velocities of the two polymers.
  • Another method is to change the shapes of extrusion orifices so that the linear velocities of the two components at extrusion become nearly equal.
  • adjustment of the amount of the third component to be added is very difficult and processability is detrimentally influenced.
  • the arrangement of the extrusion orifice is extremely difficult and yarn unevenness is caused.
  • a primary aspect of this invention resides in a spinneret for composite spinning which comprises introduction capillaries for separately introducing the different polymers and an extrusion capillary which communicates with said introduction capillaries, said two kinds of capillaries being arranged in a spinneret plate in such a manner that they satisfy the following inequality, L,, L, 5.7 ⁇ /S l"),wherein 5 cross sectional area (mm') of the extrusion capillary, L length (mm) of the extrusion capillary and L thickness (mm) of the portion of the spinneret plate located beneath the lowest points of the introduction capillaries.
  • Another primary feature of this invention resides in a spinneret for composite spinning in which the introduction capillaries'for separately guiding the different polymers and the extrusion capillary which communicates with said introduction capillaries are arranged in the spinneret plate in such a manner that they satisfy said inequality (I) and furthermore a front plate having guide holes which communicate with the introduction capillaries and have different L/D is provided above said spinneret plate.
  • FIG. -1 is a partial'vertical cross-sectional side view of a spinneret of this invention
  • FIG. 2 is a-partial plan view of the spinneret of FIG. 1;
  • FIG. 3 is a cross-sectional view of the spinneret of FIG. I taken at'X-X' thereof;
  • FIGS. 4a, 4b and 4c show various shapes of cross section of the extrusioncapillary in the spinneret of the present invention
  • FIG. 5 shows a cross section of fibers obtained by the conventionalspinneret
  • FIG. 6 shows a cross section of fibers obtained by the spinneret of the present invention
  • FIG. 7 is a partial vertical cross-sectional side view of a spinneret of one embodiment of the present invention.
  • FIG. 8 is a partial vertical cross-sectional side view of a spinneret of another embodiment of the present invention.
  • 1 is a separating plate for separating two components A and B
  • 2 is a spinneret plate, in which two introduction capillaries 3 and 4 which guide the components A and B to extrusion capillary 5 without permitting blending of the two components.
  • the introduction capillaries 3 and 4 communicate with the extrusion capillary 5 at their lower portions.
  • the components A and B are introduced into the extrusion capillary 5 through openings 6 and 7 from the introduction capillaries 3 and 4 and they are initially joined in said extrusion capillary.
  • the value of L is preferably 0.1 to 5 mm, more preferably 0.2 to L0 mm.
  • the value of sectional area S of extrusion capillary 3 may be optionally chosen depending upon melting characteristics of the two components, spinning conditions and size and sectional shape of the desired filaments.
  • area of the openings 6 and 7 may be optionally varied by adjusting the length of the introduction capillaries 3 and 4 or extrusion capillary 5 depending upon the proportion of the two components.
  • the shape of extrusion capillai y 5 may be circular and moreover it may be non-circular as shown in (a) and (c) in FIG. 4 or annular as shown in (b) in FIG. 4, wherein 3 and 4 show introduction capillaries and 5 shows the extrusion capillary.
  • the number of the introduction capillaries is increased to three or more and separation of each component before introduction into the introduction capillaries is suitably carried out, more than two polymers may be easily composite-spun.
  • front plate 12 which has guide hole 9 having a smaller L/D for guiding component A of high viscosity to introduction capillary 3 and guide hole 10 having a greater MD for guiding component B of lower viscosity to extrusion capillary 5 is provided above spinneret plate 2 and separating plate 1 for separation of the components A and B is provided above said front plate 12.
  • the action of said front plate 12 will be explained in detail below.
  • spinneret plate 2 of this embodiment of the invention is constructed in such a manner that the components A and B are first joined to the extrusion capillary 5 for prevention of the kneeling phenomenon and said plate. is subjected to a dynamical interaction of the components A and B within an extremely short period of time.
  • each component A and B is nearly separately extruded and back pressure caused by the component B of the lower viscosity is extremely reduced depending upon the ratio of the viscosities.
  • the effect of flow resistance becomes great in the passage to extrusion capillary 5. Therefore, it becomes impossible to uniformly distribute the component B of the lower viscosity to the extrusion capillary and unevenness in the composite ratio between individual filaments and unevenness in size of filaments are caused.
  • the thickness partition 11 is limited because of restriction in diameter of extrusion capillary 5 that would result. If front plate 12 is not provided, the separating plate 1 must be thin. Therefore, in such a case, the separating plate 1 contacts the partition 11 in an extremely small area.
  • the so-called short-pass phenomenon tends to occur, namely, the component A of higher pressure and higher viscosity is incorporated into the component B of the lower viscosity through the part at which the separating plate 1 contacts the upstream face of the partition 11.
  • the difficulty as mentioned above can be overcome by providing said front plate 12 between the separating plate 1 and spinneret plate 2. That is, uniform distribution of the components to each extrusion capillary can be attained by making L/D of guide hole for the component B of the lower viscosity in front plate 12 greater than L/D of guide hole 9 for the component A of the higher viscosity in front plate 12 to increase the back pressure of the component B. Moreover, prevention of the short-pass even when the area at which separating plate 1 in contact with front plate 12 is small can be attained by suitably setting the ratio of L/D in guide hole 9 and in guide hole 10 to make the difference between the back pressure for distribution of the component A and that of the component B smaller.
  • the width of the separating plate 1 can further be made greater and the separation of each component can more advantageously effected.
  • This invention is constructed as mentioned above.
  • the introduction capillaries of each component are separately provided and the introduction capillaries communicate with the extrusion capillary at the lower part of the former. Therefore, each component is initially joined to the extrusion capillary and thus the time during which the spinneret is subjected to the dynamical interaction of each component becomes extremely short. Therefore, even if the difference between the melt viscosities of each component is considerably great, the two components are extruded in a state such that the interface of the two components is maintained at nearly the center of crosssection of the filament as shown in H6. 6. Therefore, the kneeling phenomenon is substantially completely prevented and composite filaments having excellent crimpability can be produced.
  • the introduction capillaries may of simple cylindrical construction and the extrusion capillary may be simply arranged in the perpendicular direction downwardly from the spinneret plate. Therefore, the spinneret can easily be assembled.
  • the extrusion capillary is arranged at the center part between the introduction capillaries and hence the spinneret of this invention is very suitable as the spinneret for production of the noncircular composite fibers and the hollow composite fibers.
  • a spinneret for composite spinning which comprises a plurality of introduction capillaries for separately introducing different polymers and a hollow extrusion capillary which communicates with said introduction capillaries, said introduction capillaries and extrusion capillaries being contained in a spinneret plate in a vertical direction relative to the lower surface of the spinneret plate in such a manner that they satisfy the following inequality, L L 5.7 Vfijwherein S sectional area (mm') of the extrusion capillary, L length (mm) of the extrusion capillary and L distance (mm) between lower end of the introduction capillaries and the lower surface of the spinneret plate.
  • a spinneret according to claim 1 wherein there is a front plate having guide holes which communicate with said introduction capillaries, respectively, and wherein said guide holes have a different L/D, provided above said spinneret plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Multicomponent Fibers (AREA)
US00158484A 1970-07-20 1971-06-30 Spinneret for composite spinning Expired - Lifetime US3792944A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6343270A JPS4816446B1 (Direct) 1970-07-20 1970-07-20
JP7643870A JPS4816447B1 (Direct) 1970-09-01 1970-09-01

Publications (1)

Publication Number Publication Date
US3792944A true US3792944A (en) 1974-02-19

Family

ID=26404554

Family Applications (1)

Application Number Title Priority Date Filing Date
US00158484A Expired - Lifetime US3792944A (en) 1970-07-20 1971-06-30 Spinneret for composite spinning

Country Status (5)

Country Link
US (1) US3792944A (Direct)
DE (1) DE2136027A1 (Direct)
FR (1) FR2103068A5 (Direct)
GB (1) GB1323834A (Direct)
NL (1) NL152609B (Direct)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738607A (en) * 1985-12-27 1988-04-19 Chisso Corporation Spinneret assembly for conjugate spinning
US5017116A (en) * 1988-12-29 1991-05-21 Monsanto Company Spinning pack for wet spinning bicomponent filaments
US5458968A (en) * 1994-01-26 1995-10-17 Monsanto Company Fiber bundles including reversible crimp filaments having improved dyeability
US5511960A (en) * 1992-03-17 1996-04-30 Chisso Corp. Spinneret device for conjugate melt-blow spinning
US6626657B1 (en) * 1999-07-01 2003-09-30 Mario Miani Spinneret holder assembly for producing a continuous plastic multiple-component yarn with a preset component ratio
WO2005061773A1 (en) * 2003-12-20 2005-07-07 Corovin Gmbh Polyethylene-based, soft nonwoven fabric
CN114108113A (zh) * 2021-12-27 2022-03-01 浙江昊能科技有限公司 一种超细旦易染型涤锦复合长丝纤维的制造方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110983466B (zh) * 2019-12-24 2021-11-16 江苏恒力化纤股份有限公司 一种ptt/pet双组份弹性丝及其制备方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA718812A (en) * 1965-09-28 Seiz Richard Spinnerets
FR1456811A (fr) * 1965-09-10 1966-07-08 Degussa Filière notamment pour la fabrication de fils composites
US3315021A (en) * 1964-06-19 1967-04-18 Snia Viscosa Process for the production of crimpable composite synthetic yarns
US3316589A (en) * 1962-12-31 1967-05-02 Du Pont Apparatus for producing composite filaments
US3461197A (en) * 1963-03-22 1969-08-12 Jerome H Lemelson Method for producing composite articles
US3659983A (en) * 1969-02-19 1972-05-02 Dow Chemical Co Spinnerette for the production of hollow fibers
US3669591A (en) * 1969-03-11 1972-06-13 Snam Progetti Apparatus for producing composite fibers

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA718812A (en) * 1965-09-28 Seiz Richard Spinnerets
US3316589A (en) * 1962-12-31 1967-05-02 Du Pont Apparatus for producing composite filaments
US3461197A (en) * 1963-03-22 1969-08-12 Jerome H Lemelson Method for producing composite articles
US3315021A (en) * 1964-06-19 1967-04-18 Snia Viscosa Process for the production of crimpable composite synthetic yarns
FR1456811A (fr) * 1965-09-10 1966-07-08 Degussa Filière notamment pour la fabrication de fils composites
US3659983A (en) * 1969-02-19 1972-05-02 Dow Chemical Co Spinnerette for the production of hollow fibers
US3669591A (en) * 1969-03-11 1972-06-13 Snam Progetti Apparatus for producing composite fibers

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738607A (en) * 1985-12-27 1988-04-19 Chisso Corporation Spinneret assembly for conjugate spinning
US5017116A (en) * 1988-12-29 1991-05-21 Monsanto Company Spinning pack for wet spinning bicomponent filaments
US5511960A (en) * 1992-03-17 1996-04-30 Chisso Corp. Spinneret device for conjugate melt-blow spinning
US5458968A (en) * 1994-01-26 1995-10-17 Monsanto Company Fiber bundles including reversible crimp filaments having improved dyeability
US6626657B1 (en) * 1999-07-01 2003-09-30 Mario Miani Spinneret holder assembly for producing a continuous plastic multiple-component yarn with a preset component ratio
US20070134478A1 (en) * 2003-12-20 2007-06-14 Corovin Gmbh Polyethylene-based, soft nonwoven fabric
WO2005061773A1 (en) * 2003-12-20 2005-07-07 Corovin Gmbh Polyethylene-based, soft nonwoven fabric
US20090133813A1 (en) * 2003-12-20 2009-05-28 Fiberweb Corovin Gmbh Method for the manufacture of polyethylene-based, soft nonwoven fabric
US20090136606A1 (en) * 2003-12-20 2009-05-28 Fiberweb Corovin Gmbh Device for the manufacture of polyethylene-based, soft nonwoven fabric
CN100549267C (zh) * 2003-12-20 2009-10-14 卡罗文有限公司 聚乙烯基软质非织造织物
EP2218811A1 (en) * 2003-12-20 2010-08-18 Fiberweb Corovin GmbH Polyethylene-based, soft nonwoven fabric
EP2341174A1 (en) * 2003-12-20 2011-07-06 Fiberweb Corovin GmbH Polyethylene-based, soft nonwoven fabric
US8420557B2 (en) 2003-12-20 2013-04-16 Fiberweb Corovin Gmbh Polyethylene-based, soft nonwoven fabric
CN114108113A (zh) * 2021-12-27 2022-03-01 浙江昊能科技有限公司 一种超细旦易染型涤锦复合长丝纤维的制造方法
CN114108113B (zh) * 2021-12-27 2022-10-18 浙江昊能科技有限公司 一种超细旦易染型涤锦复合长丝纤维的制造方法

Also Published As

Publication number Publication date
NL152609B (nl) 1977-03-15
DE2136027A1 (de) 1972-01-27
FR2103068A5 (Direct) 1972-04-07
NL7109925A (Direct) 1972-01-24
GB1323834A (en) 1973-07-18

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