US2623241A - Spinneret and its method of production - Google Patents

Spinneret and its method of production Download PDF

Info

Publication number
US2623241A
US2623241A US183712A US18371250A US2623241A US 2623241 A US2623241 A US 2623241A US 183712 A US183712 A US 183712A US 18371250 A US18371250 A US 18371250A US 2623241 A US2623241 A US 2623241A
Authority
US
United States
Prior art keywords
wires
filaments
chemical treatment
laminated structure
plastic
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
US183712A
Other languages
English (en)
Inventor
Mackay John D Mcc
Arthur W S Clark
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Application granted granted Critical
Publication of US2623241A publication Critical patent/US2623241A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes
    • D01D4/022—Processes or materials for the preparation of spinnerettes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0033—Moulds or cores; Details thereof or accessories therefor constructed for making articles provided with holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • B29C70/347—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation combined with compressing after the winding of lay-ups having a non-circular cross-section, e.g. flat spiral windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/545—Perforating, cutting or machining during or after moulding

Definitions

  • FIG-4 INVENTORS: John Doug/as McClure Mucky ⁇ ; A rf/rur We/Ieslv Stewart C/ ark BYM W V mORNEYS Patented Dec. 30, 1952 UNITED STATES PATENT OFFICE SPINNERET AND ITS METHOD OF PRODUCTION Application September 8, 1950, Serial No. 183,712
  • the present invention is concerned with spinnerets and a method for their production.
  • the conventional method of spinneret manufacture has been that of punching or drilling holes of the required diameter in thin sheets of metallic material requiring precision instruments and taking considerable time.
  • the object of the present invention is to provide improved plastic spinnerets and a method for their production which will enable such spinnerets to be produced conveniently and cheaply.
  • a method for the production of plastic spinnerets comprises forming a laminated structure comprising layers of substantially parallel filaments which can be removed by chemical treatment held separated by material unaffected by said chemical treatment, the said parallel filaments of one layer being substantially parallel to the said parallel filaments of any other layer, forming a solid block of plastic of the kind which is not dissolved by said chemical treatment in and throughout and surrounding said laminated structure, cutting said block into plates substantially perpendicular to the said filaments which can be removed by said chemical treatment, and removing the short filaments left in said plates by said chemical treatment.
  • the said layers in said laminated structure can be formed from woven fabric having substantially parallel filaments which can be removed by chemical treatment which does not remove the filaments crossing said parallel filaments.
  • the substantially parallel filaments can be for example metallic wires of the requisite diameter and solubility in acids and the filaments crossing said parallel filaments are not soluble in these acids.
  • the filaments crossing said parallel filaments may consist for example of textile filaments, glass filaments or metal wires unattackable by the acid which dissolves said parallel filaments.
  • the said layers in said laminated structure may be formed from textile covered filaments or plastic covered filaments.
  • each of said layers in the laminated structure may be separated by at least one layer of permeable material which is not attackable by said chemical treatment, as for example fabric material.
  • plastic spinnerets according to the invention contain unattackable fibres which are distributed in the plastic and therethrough at least in the a 2 vicinity of the perforations, spinnerets of high mechanical strength are formed.
  • thesubstantially parallel filaments which can be removed by a chemical treatment are metallic wires of the requisite diameter and solubility in acid while the filaments crossing said parallel filaments are not soluble in said acids and may consist of textile filaments, glass filaments or metal wire unattachable by the acid used for dissolving said parallel filaments.
  • the removal by said chemical treatment includes removal by solution in a, suitable solvent, removal by chemical reaction and electrolytic removal.
  • the said permeable material consists of fabric material.
  • a plastic of the kind which is not dissolved by said chemical treatment are those derived from liquids convertible into a plastic as for instance liquid polymerisable compounds for example, monomers such as methyl methacrylate and styrene; or thermosetting compositions comprising compounds capable of forming crosslinking resins and a solution of a catalyst therefor in a polymerising solvent as for instance a liquid composition comprising di-methacrylic ester of bis(beta hydroxy ethyl) phthalate, benzoyl peroxide and n-butyl methacrylate.
  • the said laminated structure can be formed by winding the said woven fabric into a spiral interleaved if desired with a spiral strip of said fabric material, so as to produce a roll of cloth with all the soluble filaments parallel to the axis.
  • the said laminated structure is formed by superimposing rectangular layers of said woven fabric, so that the parallel filaments of one layer are parallel to the said parallel filaments of any other layer, and separating said layers if desired by rectangular layers of said fabric material.
  • laminated structure is included a structure in which the layers thereof can be plane surfaces, curved surfaces or surfaces formed by rolling a strip of material as for in stance into a cylindrical body.
  • the laminated structure may have for instance a circular or rectangular cross-section.
  • the said solid block of plastic is formed by treating the said woven layers of fabric and the permeable material by impregnation either before the formation of the said laminated structure or after the said laminated structure has been produced with subsequent polymerisation.
  • the said laminated structure can be formed as a rigid bundle. preferably of substantially circular cross-section. of textile of plastic covered metal wires lying substantially parallel to one another.
  • the said bundle can be formed for example from a continuous length of covered metal wire wound spirally on a collapsable swift so that the bundle of wires formed into a ring thereon has a transverse semi-circular cross-section.
  • the ring of wires thus formed after removal from the swift can be deformed into a bundle of substantially parallel wires and of circular cross-section.
  • the bundle can be suitable wound at each end to keep the wires of the bundle tightly together.
  • Fig. 1 is a perspective view of semi-wire cloth with a warp of 0.0044" diameter iron wires spaced at 100 wires to the inch and with a weft of fine cotton threads
  • Fig. 2 is a perspective view of a length of the semi-wire cloth of Fig. 1 rolled into a cylinder
  • Fig. 3 is a perspective view of a cylinder formed from rectangular layers of the semi-wire cloth of Fig. 1 said layers being separated one from the other by rectangular layers of fabric material
  • Fig. 4 is a perspective view in part section of a solid cylindrical block of plastic showing a cut plate from which the wires have been removed and the remaining block in which the wires are still present.
  • the semi-wire cloth I with iron wires 2 and cotton threads 3 is cut into strips about 2 in. wide and 22 in. long with the iron wires 2 running across and the cotton wires 3 running along them.
  • Two of these strips I are rolled up with separating strips 2 in. wide of calico 4 and further layers of calico 4 are added to produce a plain margin 5.
  • the rolling is done in a dish containing a liquid resin such as a composition comprising dimethacrylic ester of bis(beta hydroxy ethyl) phthalate, benzoyl peroxide and n-butyl methacrylate which will polymerise when heated.
  • the roll 6 thus produced is placed in a tight fitting rubber bag with a further small quantity of a liquid resin and the bag closed.
  • the whole is to be in a vessel heated at a temperature of 45 C. rising after 2 days to 110 C. Then the vessel is cooled.
  • the resulting block 1 is cut on a lathe into slices 8 about a; in. thick by 1% in. diameter, the part containing the iron wires 2 occupying about 1 in. diameter.
  • These slices 8 are polished and the wires 2 are dissolved out by immersing in warm dilute hydrochloric acid containing a trace of cupric chloride.
  • An alternative method of impregnation is to put the dried roll 8 into a tight fitting rubber tube closed at the bottom with a valve and to apply a vacuum to the top end. The valve is then opened to a supply of liquid resin which is then drawn right through the roll 6. This method has the advantage of removing all the air from the cloth before the resin is applied.
  • An alternative way for instance of removing the iron wire 2 from the slice 8 is to put the slice 8 between mercury on one side and a salt solution on the other side and to connect the two liquids to a source of electricity in such manner that the iron wires form the anode.
  • the semi-wire cloth I is cut into a number of rectangular strips of different widths, the maximum width being 1 /2 in. and all of equal length of say 2 /2 in. Rectangles of fabric material are also produced of similarly graded width with a maximum width of 2 in. The length of all these rectangles of fabric material is also 2 in.
  • a laminated structure is produced from these rectangles of wire cloth and fabric material by interposing a layer of fabric material between layers of the wire cloth.
  • the laminated structure is produced in the form of a compact cylinder by arranging the rectangles of wire cloth and fabric material in such a manner that the widest rectangles are in the middle and that there is a gradation in the width of the rectangles as these rectangles are superimposed one upon the other.
  • the laminated structure thus produced can be impregnated with the liquid resin in accordance with any of the methods employed in the first embodiment and the solid block of plastic eventually produced is also cut into thin plates substantially perpendicular to the iron wires 2 and these wires are then removed from the thin plates by a chemical treatment.
  • the laminated structure which can be produced in accordance with the third described embodiment of the invention for instance a bundle of substantially parallel cotton covered iron wires can also be impregnated with the liquid resin in accordance with any of the methods employed in the first embodiment and the solid block of plastic eventually produced is also cut into thin plates substantially perpendicular to the cotton covered iron wires and the iron wires therefrom are then removed from the thin plates by a chemical treatment.
  • a method for the production of plastic spinnerets which comprises forming a laminated structure composed of a plurality of substantially parallel metal wires which are dissolvable by chemical treatment, said wires being held in parallel spaced relationship from each other by fabric material and said laminated structure being impregnated with a liquid composition which is convertible into a solid resin that is unaffected. by said chemical treatment, thereafter converting said liquid composition into solid resin form to produce a solid block of resin in, throughout and surrounding said laminated structure, cutting said block into plates substantially perpendicular to said metal wires, and thereafter removing the short wires left in said plates by said chemical treatment.
  • said laminated structure is formed of layers of woven fabric made up of substantially parallel metal wires which are dissolvable by the chemical treatment and filaments crossing said parallel metal wires which are not removable by said chemical treatment.
  • each of said layers of woven fabric is separated by a layer of permeable fabric material which is not attackable by said chemical treatment.
  • said laminated structure is formed by winding a woven fabric made up of substantially parallel metal wires which are dissolvable by the chemical treatment and filaments crossing said parallel metal wires which are not removable by said chemical treatment into a roll in which the metal wires extend parallel to the axis.
  • a method for the production of plastic spinnerets which comprises forming a rigid bundle of substantially parallel, covered metal wires, said wires being dissolvable by chemical treatment but the coverings thereof being unaffected by said chemical treatment and said laminated structure being impregnated with a liquid composition which is convertible into a solid resin that is also unaffected by said chemical treatment, thereafter converting said liquid composition into solid resin form to produce a solid block of resin in, throughout and surrounding said laminated structure, cutting said block into plates substantially perpendicular to said metal wires, and thereafter removing the short wires left in said plates by said chemical treatment.
  • liquid 6 composition is a thermosetting composition comprising compounds capable of forming crosslinking resins and a solution of a catalyst therefor in a polymerizing solvent.
  • thermosetting composition is a liquid composition comprising dimethacrylic ester of bis(beta-hydroxyethyl) phthalate benzoyl peroxide and n-butyl methacrylate.
  • Plastic spinnerets characterised in that the plastic thereof has fibres distributed therethrough at least in the vicinity of the perforations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Nonwoven Fabrics (AREA)
US183712A 1949-10-31 1950-09-08 Spinneret and its method of production Expired - Lifetime US2623241A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB292033X 1949-10-31

Publications (1)

Publication Number Publication Date
US2623241A true US2623241A (en) 1952-12-30

Family

ID=10287789

Family Applications (1)

Application Number Title Priority Date Filing Date
US183712A Expired - Lifetime US2623241A (en) 1949-10-31 1950-09-08 Spinneret and its method of production

Country Status (6)

Country Link
US (1) US2623241A (fr)
BE (1) BE498940A (fr)
CH (1) CH292033A (fr)
DE (1) DE922075C (fr)
FR (1) FR1026230A (fr)
GB (1) GB683622A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663663A (en) * 1952-01-10 1953-12-22 Westinghouse Electric Corp Thermosetting synthetic resin laminate with a predetermined roughened surface and process for producing the same
US3202733A (en) * 1962-03-06 1965-08-24 Esb Reeves Corp Method of making microporous plastic
US3473985A (en) * 1964-08-28 1969-10-21 Us Navy Porous plastic
US3630799A (en) * 1966-06-06 1971-12-28 Thomas & Betts Corp Method of making a supporting medium having a plurality of spaced holes
US3663332A (en) * 1966-08-30 1972-05-16 Armstrong Cork Co A method of forming a gasket
US3670069A (en) * 1969-09-15 1972-06-13 Itt Process for forming hydroxyethyl cellulose fibers having high water absorption and high water retention properties
US4399084A (en) * 1980-08-18 1983-08-16 Teijin Limited Process for producing a fibrous assembly
US5490602A (en) * 1992-06-15 1996-02-13 Short Brothers Plc Composite structure manufacture

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1047984B (de) * 1953-06-25 1958-12-31 Trikotfabriken J Schiesser A G Spinnkopf zur Erzeugung von zusammengesetzten kuenstlichen Faeden oder Hohlfaeden sowie Verfahren zur Herstellung eines solchen Spinnkopfes
US4466860A (en) * 1981-09-21 1984-08-21 Giordano Aggio Method for producing etched patterns on textile fabrics
FR2590518B1 (fr) * 1985-11-22 1988-07-15 Spml Soc Civ Inventeurs Nouveau produit composite a base d'armature de fils ou fibres notamment tisses ou tricotes enroulee sur elle-meme

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB161526A (en) * 1920-04-10 1922-03-23 Sudenburger Maschinenfabrik Un Spinning nozzles for artificial threads
US1654936A (en) * 1926-03-23 1928-01-03 Baker & Co Inc Method of making spinnerets
US2266349A (en) * 1937-07-10 1941-12-16 Wempe Bernhard Method of producing holes in thin sheets of metal or glass
US2360479A (en) * 1942-07-10 1944-10-17 Western Electric Co Condenser dielectric and method of making
US2506244A (en) * 1945-06-28 1950-05-02 Spolek Pro Chemickou A Lutni V Method of producing ceramic bodies having longitudinal passages
US2510598A (en) * 1944-12-12 1950-06-06 Mallory & Co Inc P R Method of making iron cores

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE364543C (de) * 1920-04-10 1922-11-28 Eisengiesserei Akt Ges Zu Magd Verfahren zur Herstellung von Spinnduesen fuer Kunstfaeden
DE536666C (de) * 1928-06-26 1931-10-24 Bakelite Ges M B H Spinnduese, insbesondere fuer die Kunstseidenherstellung
DE745018C (de) * 1939-08-22 1944-02-23 Ig Farbenindustrie Ag Spinnduese, insbesondere fuer die Herstellung von Kunstseidefaeden

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB161526A (en) * 1920-04-10 1922-03-23 Sudenburger Maschinenfabrik Un Spinning nozzles for artificial threads
US1654936A (en) * 1926-03-23 1928-01-03 Baker & Co Inc Method of making spinnerets
US2266349A (en) * 1937-07-10 1941-12-16 Wempe Bernhard Method of producing holes in thin sheets of metal or glass
US2360479A (en) * 1942-07-10 1944-10-17 Western Electric Co Condenser dielectric and method of making
US2510598A (en) * 1944-12-12 1950-06-06 Mallory & Co Inc P R Method of making iron cores
US2506244A (en) * 1945-06-28 1950-05-02 Spolek Pro Chemickou A Lutni V Method of producing ceramic bodies having longitudinal passages

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663663A (en) * 1952-01-10 1953-12-22 Westinghouse Electric Corp Thermosetting synthetic resin laminate with a predetermined roughened surface and process for producing the same
US3202733A (en) * 1962-03-06 1965-08-24 Esb Reeves Corp Method of making microporous plastic
US3473985A (en) * 1964-08-28 1969-10-21 Us Navy Porous plastic
US3630799A (en) * 1966-06-06 1971-12-28 Thomas & Betts Corp Method of making a supporting medium having a plurality of spaced holes
US3663332A (en) * 1966-08-30 1972-05-16 Armstrong Cork Co A method of forming a gasket
US3670069A (en) * 1969-09-15 1972-06-13 Itt Process for forming hydroxyethyl cellulose fibers having high water absorption and high water retention properties
US4399084A (en) * 1980-08-18 1983-08-16 Teijin Limited Process for producing a fibrous assembly
US5490602A (en) * 1992-06-15 1996-02-13 Short Brothers Plc Composite structure manufacture

Also Published As

Publication number Publication date
CH292033A (de) 1953-07-31
DE922075C (de) 1955-03-07
BE498940A (fr)
FR1026230A (fr) 1953-04-24
GB683622A (en) 1952-12-03

Similar Documents

Publication Publication Date Title
US2623241A (en) Spinneret and its method of production
DE60007662T2 (de) Verbundgewebe
DE2658408C3 (de) Semipermeable Verbundmembran und Verfahren zu ihrer Herstellung
DE69116152T2 (de) Band für eine langspaltpresse mit anisotrop gewebten armierungsgeweben
DE2208587C3 (de) Verfahren und Vorrichtung zur Herstellung eines selektiv durchlässigen Membrankörpers
EP0967422B1 (fr) Garniture d'étanchéité en graphite et feuille de plastique
US2571372A (en) Plastic venetian blind tape
DE112013000385T5 (de) Hybrider Vliesseparator mit invertierter Struktur
DE3381009D1 (de) Verfahren zur herstellung eines formkoerpers aus verbundmaterial und nach diesem verfahren hergestellter formkoerper.
US3737963A (en) Roller construction
US3897289A (en) Method of forming wire woven fabric for pneumatic tires
US2903787A (en) Method of producing strip materials
US3586557A (en) Micaceous insulation and electrical apparatus insulated therewith
US2806076A (en) Method of manufacturing the porous tube for storage battery plate
US3725130A (en) Method of making tubular battery electrode
US3676246A (en) Method for longitudinal reinforcing plastic pipes
US5134045A (en) Multitubular bag for electrodes of electric batteries
DE58909371D1 (de) Verfahren zur Herstellung mehrlagiger verstreckter Bändchen.
DE1189599B (de) Isolierband fuer elektrische Zwecke
US2230976A (en) Process of making storage battery plates
US2138383A (en) Cop tube and method of manufacturing the same
US3559810A (en) Fabric including a filler of greater area than the fabric
US3773582A (en) Yarn consisting of stiff hair and process for making the same
DE2256826A1 (de) Ringfoermiger koerper
RU2748555C1 (ru) Способ изготовления многослойной тканой оболочки