US3778208A - Apparatus for the manufacture of eccentric core/sheath conjugate filaments - Google Patents

Apparatus for the manufacture of eccentric core/sheath conjugate filaments Download PDF

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Publication number
US3778208A
US3778208A US00263905A US3778208DA US3778208A US 3778208 A US3778208 A US 3778208A US 00263905 A US00263905 A US 00263905A US 3778208D A US3778208D A US 3778208DA US 3778208 A US3778208 A US 3778208A
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United States
Prior art keywords
spinneret
sheath
back plate
plateau
channel
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Expired - Lifetime
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US00263905A
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English (en)
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D Bisset
K Pugh
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Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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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
    • D01D5/34—Core-skin structure; Spinnerette packs therefor

Definitions

  • ABSTRACT Apparatus for the manufacture of sheath/core conjugate filaments in which the sheath component flows into a channel containing a dilobate end' portion formed in a plateau on the surface of a spinneret plate and is extruded through an extrusion orifice contained in a counter-bore communicating with the dilobate channel, the core forming material being injected through a D-shaped orifice into the same counter bore to yield a filament having an eccentrically located D- shaped core.
  • the core component is essentially D-shaped and is located principally in one half of the filament, depending on the ratio of the components.
  • Apparatus, that is spinneret assemblies, for the production of such filaments have been described in a number of patent specifications of which British Pat. Nos. 1,017,639; 1,101,452 and 1,148,773 are examples.
  • a particularly suitable assembly for the production of core/sheath conjugate filaments having eccentrically located D-shaped core comprises a spinneret plate containing at least one plateau located on its upper surface in which there is formed channels of a defined shape and which communicate with a portion of the spinneret surface from which the sheath polymer flows.
  • Extrusion orifices are located in counter bores formed in the spinneret plate at the closed ends of the said channels and a back plate is positioned above the spinneret plate and in contact with the plateaux, providing means supplying sheath forming polymer to the space between the said plate and the spinneret plate and containing D-shaped orifices aligned with the extrusion orifices in the spinneret plate. Means are also provided for supplying polymer to the D- shaped orifices of the said back plate.
  • the present invention provides a spinneret assembly for the manufacture of a sheath/core conjugate filament having an eccentricaly located D-shaped core, comprising a spinneret plate having an upper and lower face, at least one plateau located on the said upper face in which plateau is formed a channel having a closed end portion and containing an extrusion orifice counter-bore communicating with an extrusion orifice formed in the lower face of the spinneret plate, a back plate positioned above the spinneret plate and having a lower surface in contact with the said plateau to define a space between the lower surface of the back plate and the upper face of the spinneret plate, which space communicates with the said channel formed in the plateau, means within the back plate adapted to supply sheath forming polymer to the said space between the lower surface of the back plate and the upper face of the spinneret plate and further means within the back plate located above the spinneret counter-bore for injecting a core forming polymer into the said counter-bore,
  • the flat of the D in the D-shaped orifices contained in the back plate is perpendicular to the line of flow of the sheath polymer in the channels and in the horizontal plane and the said orifices have a diameter which is preferably equal to or less than the diameter of the extrusion orifice counter-bores.
  • the channels formed in the plateau should preferably have dilobate end portions to control the flow of sheath forming polymer uniformly around the curved outer portion of the core component.
  • FIG. 1 is a diagrammatic representation of a cross section of a spinneret assembly according to the present invention.
  • FIG. 2 is an enlarged sectional view of the channel arrangement of FIG. 1.
  • FIG. 3 is an enlarged sectional view of a modified channel arrangement.
  • FIGS. 4 and 5 are cross sections of filaments spun using the apparatus of FIGS. 1 and 2.
  • FIG. 6 is a cross section of the filament formed using other apparatus.
  • a pack holder 1 contains a spinneret plate 2 having a raised centre plateau 3 in which are formed dilobate channels 4 having lobes 4a and 4b. Extrusion orifices 5 are formed in the base of counter-bores 6 located in the end portions of channels 4.
  • a back plate 7 is positioned in contact with the plateau 3 and defines an annular space 8 between the two plates.
  • Polymer supply channels 9 are provided to communicate with annular space 8.
  • D-shaped orifices 10 are formed in the plate vertically above the extrusion orifice counter-bores 6.
  • a distributor plate 11 is positioned behind the back plate and contains polymer supply chambers 12 and 13. Supply ports 14 communicate with chamber 12 and supply channels 9 in the back plate. Supply ports 15 communicate with chamber 13 and a recess 16 formed in the underside of the distributor plate which permits supply of polymer to the D- shaped orifices 10.
  • sheath polymer supply channel 9 feeding the annular space 8 adjacent to each channel 4.
  • the counter-bore 6 contacts the point of intersection of the lobes 4a and 4b.
  • the position of the D-shaped orifices in the back plate relatively to the counter-bore is shown in dotted outline.
  • the counter-bore is spaced apart from the point of intersection of the lobes of the channel to provide additional space for sheath forming polymer to reach the back of the orifice.
  • FIG. 4 is a cross section of a filament produced using the apparatus of FIGS. 1 and 2 in which the polymer components are present in equal amounts, the said filament having a core 20 and a sheath 21.
  • the sheath 3t and core 31 components are present in a 70/30 ratio.
  • Filaments shown in a cross section in FIG. 6 having cores 40 and sheaths 41 were produced by apparatus other than that of the present invention.
  • Eccentric core/sheath filaments in which the core and sheath components are present in equal proportions are formed from a 66 nylon homo-polymer and a 66/6/6iP (80:101l0) copolymer using the apparatus of FIGS. 1 and 2.
  • the 66 polymer is introduced into the annular chamber 12 where it passes through supply ports 14 in the distributor plate into supply channels 9 in the back plate and thence annular space 8 from where it flows into channels 4 and counter-bores 6.
  • the 66/6/6iP core component is forced from chamber 13 through supply ports 15 into the recess 16 and is then injected by the D-shaped orifice 10 through the sheath polymer contained in channel 4 into the extrusion Oflfice counter-bore 6.
  • the two polymers are then extruded through extrusion orifices 5 into conjugate filaments having the cross section shown in FIG. 5.
  • the portion of the plateau 3 surrounding the channel 4 may be machined away. This will then allow the sheath polymer to flow into the channel in a very limited amount from all directions.
  • the filaments have a cross section similar to that shown in FIG. 6.
  • the core 40 has a pinchedin appearance and the thickness of the sheath is not uniform around the curved portion of the core, thus the degree of eccentricity of the core component in relation to the sheath which can be achieved is reduced.
  • a spinneret assembly for the manufacture of a sheath/core conjugate filament having an eccentrically located D-shaped core comprising a spinneret plate having an upper and lower face, at least one plateau located on the said upper face in which plateau is formed a channel having a closed end portion surrounding an extrusion orifice counter-bore communicating with an extrusion orifice formed in the lower face of the spinneret plate, a back plate positioned above the spinneret plate and having a lower surface in contact with the said plateau to define a space between the lower surface of the back plate and the upper face of the spinneret plate, which space includes the said channel formed in the plateau, means within the back plate adapted to supply sheath forming polymer to the said space between the lower surface of the back plate and the upper face of the spinneret plate and further means within the back plate located above the spinneret counter-bore for injecting a core forming polymer into the said counter-bore, which means includes a D-shaped orifice formed

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US00263905A 1971-06-18 1972-06-19 Apparatus for the manufacture of eccentric core/sheath conjugate filaments Expired - Lifetime US3778208A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2876571 1971-06-18

Publications (1)

Publication Number Publication Date
US3778208A true US3778208A (en) 1973-12-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00263905A Expired - Lifetime US3778208A (en) 1971-06-18 1972-06-19 Apparatus for the manufacture of eccentric core/sheath conjugate filaments

Country Status (8)

Country Link
US (1) US3778208A (en, 2012)
JP (1) JPS522005B1 (en, 2012)
AU (1) AU461668B2 (en, 2012)
CA (1) CA958167A (en, 2012)
DE (1) DE2229881A1 (en, 2012)
FR (1) FR2142055B1 (en, 2012)
GB (1) GB1346103A (en, 2012)
NL (1) NL7208253A (en, 2012)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930772A (en) * 1970-06-01 1976-01-06 Imperial Chemical Industries Limited Manufacture of conjugate filaments
US4717325A (en) * 1983-06-01 1988-01-05 Chisso Corporation Spinneret assembly
US5256050A (en) * 1989-12-21 1993-10-26 Hoechst Celanese Corporation Method and apparatus for spinning bicomponent filaments and products produced therefrom
US5869107A (en) * 1995-10-02 1999-02-09 Tanaka Kikinzoku Kogyo K.K. Fabrication machine of optical fiber
WO2011002915A1 (en) 2009-06-30 2011-01-06 Kyocera Corporation Dual idle-traffic state of wireless communication device
US7919419B2 (en) 2005-01-06 2011-04-05 Buckeye Technologies Inc. High strength and high elongation wipe
EP2463425A1 (en) 2010-12-08 2012-06-13 Buckeye Technologies Inc. Dispersible nonwoven wipe material
WO2015073917A1 (en) 2013-11-15 2015-05-21 Buckeye Technologies Inc. Dispersible nonwoven wipe material
WO2017123734A1 (en) 2016-01-12 2017-07-20 Georgia-Pacific Consumer Products Lp Nonwoven cleaning substrate
WO2018132692A1 (en) 2017-01-12 2018-07-19 Georgia-Pacific Nonwovens LLC Nonwoven material for cleaning and sanitizing surfaces
WO2018132684A1 (en) 2017-01-12 2018-07-19 Georgia-Pacific Nonwovens LLC Nonwoven material for cleaning and sanitizing surfaces
WO2018132688A1 (en) 2017-01-12 2018-07-19 Georgia-Pacific Nonwovens LLC Nonwoven material for cleaning and sanitizing surfaces
WO2018187192A1 (en) 2017-04-03 2018-10-11 Georgia-Pacific Nonwovens LLC Multi-layer unitary absorbent structures
WO2019067487A1 (en) 2017-09-27 2019-04-04 Georgia-Pacific Nonwovens LLC NON-WOVEN AIR FILTRATION MEDIA
WO2019067432A1 (en) 2017-09-27 2019-04-04 Georgia-Pacific Nonwovens LLC NON-WOVEN TWO-COMPONENT FIBER MATERIAL WITH HIGH CORE
WO2019152638A1 (en) 2018-01-31 2019-08-08 Georgia-Pacific Nonwovens LLC Modified cellulose-based natural binder for nonwoven fabrics
WO2019178111A1 (en) 2018-03-12 2019-09-19 Georgia-Pacific Nonwovens LLC Nonwoven material with high core bicomponent fibers
WO2020061290A1 (en) 2018-09-19 2020-03-26 Georgia-Pacific Nonwovens LLC Unitary nonwoven material
WO2020068151A1 (en) 2018-09-26 2020-04-02 Georgia-Pacific Nonwovens LLC Latex-free and formaldehyde-free nonwoven fabrics
WO2020240476A1 (en) 2019-05-30 2020-12-03 Georgia-Pacific Nonwovens LLC Low-runoff airlaid nonwoven materials
WO2021018574A1 (de) * 2019-07-30 2021-02-04 Reifenhäuser GmbH & Co. KG Maschinenfabrik Spunbond-vliesstoff aus endlosfilamenten und vorrichtung zur erzeugung des spunbond-vliesstoffes
WO2021024200A1 (en) 2019-08-08 2021-02-11 Georgia-Pacific Nonwovens LLC Low-dust airlaid nonwoven materials
WO2021024199A1 (en) 2019-08-08 2021-02-11 Georgia-Pacific Nonwovens LLC Dispersible nonwoven materials including cmc-based binders
WO2021053588A1 (en) 2019-09-18 2021-03-25 Georgia-Pacific Mt. Holly Llc Absorbent nonwoven materials
RU2814058C2 (ru) * 2019-07-30 2024-02-21 Райфенхойзер Гмбх Унд Ко. Кг Машиненфабрик Нетканый материал "спанбонд" из непрерывных филаментов и устройство для изготовления нетканого материала "спанбонд"

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992499A (en) * 1974-02-15 1976-11-16 E. I. Du Pont De Nemours And Company Process for sheath-core cospun heather yarns
JPS523210A (en) * 1975-06-25 1977-01-11 Yoshito Nakada Method of driving largeediameter pile
JPS55100042U (en, 2012) * 1978-12-29 1980-07-11
JPS58152922A (ja) * 1982-03-04 1983-09-10 Nissan Motor Co Ltd 自動車用エンジンのベアリングビ−ム
JPS5968166U (ja) * 1982-10-29 1984-05-09 日野自動車株式会社 シリンダブロツクの構造
JPS59131944U (ja) * 1983-02-25 1984-09-04 三菱自動車工業株式会社 エンジン構造
JPS6043155U (ja) * 1983-09-02 1985-03-27 トヨタ自動車株式会社 ラダフレ−ム構造主軸受装置
US4521484A (en) * 1984-06-07 1985-06-04 E. I. Du Pont De Nemours And Company Self-crimping polyamide filaments
JPS6422849U (en, 2012) * 1987-08-01 1989-02-07

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861319A (en) * 1956-12-21 1958-11-25 Du Pont Intermittent core filaments
US3039174A (en) * 1958-05-12 1962-06-19 Du Pont Elongated composite structure
GB1101452A (en) * 1964-02-21 1968-01-31 Onderzoekings Inst Res An improved spinning head for the melt spinning of conjugate filaments
US3660993A (en) * 1966-12-28 1972-05-09 Kanegafuchi Spinning Co Ltd Two-component composite filament and method of producing same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861319A (en) * 1956-12-21 1958-11-25 Du Pont Intermittent core filaments
US3039174A (en) * 1958-05-12 1962-06-19 Du Pont Elongated composite structure
GB1101452A (en) * 1964-02-21 1968-01-31 Onderzoekings Inst Res An improved spinning head for the melt spinning of conjugate filaments
US3660993A (en) * 1966-12-28 1972-05-09 Kanegafuchi Spinning Co Ltd Two-component composite filament and method of producing same

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3930772A (en) * 1970-06-01 1976-01-06 Imperial Chemical Industries Limited Manufacture of conjugate filaments
US4717325A (en) * 1983-06-01 1988-01-05 Chisso Corporation Spinneret assembly
US5256050A (en) * 1989-12-21 1993-10-26 Hoechst Celanese Corporation Method and apparatus for spinning bicomponent filaments and products produced therefrom
US5869107A (en) * 1995-10-02 1999-02-09 Tanaka Kikinzoku Kogyo K.K. Fabrication machine of optical fiber
US8501647B2 (en) 2005-01-06 2013-08-06 Buckeye Technologies Inc. High strength and high elongation wipes
US7919419B2 (en) 2005-01-06 2011-04-05 Buckeye Technologies Inc. High strength and high elongation wipe
WO2011002915A1 (en) 2009-06-30 2011-01-06 Kyocera Corporation Dual idle-traffic state of wireless communication device
WO2012078860A1 (en) 2010-12-08 2012-06-14 Buckeye Technologies Inc. Dispersible nonwoven wipe material
EP2463425A1 (en) 2010-12-08 2012-06-13 Buckeye Technologies Inc. Dispersible nonwoven wipe material
EP3199682A1 (en) 2010-12-08 2017-08-02 Georgia-Pacific Nonwovens LLC Dispersible nonwoven wipe material
WO2015073917A1 (en) 2013-11-15 2015-05-21 Buckeye Technologies Inc. Dispersible nonwoven wipe material
WO2017123734A1 (en) 2016-01-12 2017-07-20 Georgia-Pacific Consumer Products Lp Nonwoven cleaning substrate
WO2018132692A1 (en) 2017-01-12 2018-07-19 Georgia-Pacific Nonwovens LLC Nonwoven material for cleaning and sanitizing surfaces
WO2018132684A1 (en) 2017-01-12 2018-07-19 Georgia-Pacific Nonwovens LLC Nonwoven material for cleaning and sanitizing surfaces
WO2018132688A1 (en) 2017-01-12 2018-07-19 Georgia-Pacific Nonwovens LLC Nonwoven material for cleaning and sanitizing surfaces
WO2018187192A1 (en) 2017-04-03 2018-10-11 Georgia-Pacific Nonwovens LLC Multi-layer unitary absorbent structures
WO2019067487A1 (en) 2017-09-27 2019-04-04 Georgia-Pacific Nonwovens LLC NON-WOVEN AIR FILTRATION MEDIA
WO2019067432A1 (en) 2017-09-27 2019-04-04 Georgia-Pacific Nonwovens LLC NON-WOVEN TWO-COMPONENT FIBER MATERIAL WITH HIGH CORE
WO2019152638A1 (en) 2018-01-31 2019-08-08 Georgia-Pacific Nonwovens LLC Modified cellulose-based natural binder for nonwoven fabrics
US11692291B2 (en) 2018-03-12 2023-07-04 Glatfelter Corporation Nonwoven material with high core bicomponent fibers
WO2019178111A1 (en) 2018-03-12 2019-09-19 Georgia-Pacific Nonwovens LLC Nonwoven material with high core bicomponent fibers
WO2020061290A1 (en) 2018-09-19 2020-03-26 Georgia-Pacific Nonwovens LLC Unitary nonwoven material
WO2020068151A1 (en) 2018-09-26 2020-04-02 Georgia-Pacific Nonwovens LLC Latex-free and formaldehyde-free nonwoven fabrics
US11993877B2 (en) 2018-09-26 2024-05-28 Glatfelter Corporation Latex-free and formaldehyde-free nonwoven fabrics
WO2020240476A1 (en) 2019-05-30 2020-12-03 Georgia-Pacific Nonwovens LLC Low-runoff airlaid nonwoven materials
WO2021018574A1 (de) * 2019-07-30 2021-02-04 Reifenhäuser GmbH & Co. KG Maschinenfabrik Spunbond-vliesstoff aus endlosfilamenten und vorrichtung zur erzeugung des spunbond-vliesstoffes
RU2814058C2 (ru) * 2019-07-30 2024-02-21 Райфенхойзер Гмбх Унд Ко. Кг Машиненфабрик Нетканый материал "спанбонд" из непрерывных филаментов и устройство для изготовления нетканого материала "спанбонд"
US12134845B2 (en) 2019-07-30 2024-11-05 Reifenhaeuser Gmbh & Co. Kg Maschinenfabrik Spunbond nonwoven of continuous filaments and of making same
WO2021024199A1 (en) 2019-08-08 2021-02-11 Georgia-Pacific Nonwovens LLC Dispersible nonwoven materials including cmc-based binders
WO2021024200A1 (en) 2019-08-08 2021-02-11 Georgia-Pacific Nonwovens LLC Low-dust airlaid nonwoven materials
WO2021053588A1 (en) 2019-09-18 2021-03-25 Georgia-Pacific Mt. Holly Llc Absorbent nonwoven materials
EP4442882A2 (en) 2019-09-18 2024-10-09 Glatfelter Corporation Absorbent nonwoven materials

Also Published As

Publication number Publication date
GB1346103A (en) 1974-02-06
NL7208253A (en, 2012) 1972-12-20
JPS522005B1 (en, 2012) 1977-01-19
AU4357472A (en) 1974-01-03
AU461668B2 (en) 1975-06-05
FR2142055A1 (en, 2012) 1973-01-26
CA958167A (en) 1974-11-26
DE2229881A1 (de) 1972-12-21
FR2142055B1 (en, 2012) 1977-12-23

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