GB735788A - Improved filtering device for use in the spinning of synthetic linear polymers - Google Patents

Improved filtering device for use in the spinning of synthetic linear polymers

Info

Publication number
GB735788A
GB735788A GB7240/53A GB724053A GB735788A GB 735788 A GB735788 A GB 735788A GB 7240/53 A GB7240/53 A GB 7240/53A GB 724053 A GB724053 A GB 724053A GB 735788 A GB735788 A GB 735788A
Authority
GB
United Kingdom
Prior art keywords
plates
grooves
plate
bores
lower face
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
Application number
GB7240/53A
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.)
Perfogit SpA
Original Assignee
Perfogit SpA
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 Perfogit SpA filed Critical Perfogit SpA
Publication of GB735788A publication Critical patent/GB735788A/en
Expired legal-status Critical Current

Links

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
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/10—Filtering or de-aerating the spinning solution or melt
    • D01D1/106—Filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
    • B01D29/46—Edge filtering elements, i.e. using contiguous impervious surfaces of flat, stacked bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/18—Filters characterised by the openings or pores
    • B01D2201/184—Special form, dimension of the openings, pores of the filtering elements

Abstract

A filter for use in the melt-spinning of synthetic linear polymers comprises a plurality of metal plates adjacent to one another and arranged in succession with respect to the general flow of the molten polymer, the surfaces of the <PICT:0735788/IV (a)/1> <PICT:0735788/IV (a)/2> plates having recesses therein to define narrow channels between contacting plates, the plates being further provided with through passages communicating with the recesses, and means for assembling the plates in juxtaposed contacting relationship, wherein the passages connect the narrow channels in staggered relationship to define a plurality of staggered paths of flow for the molten polymer. As shown in Fig. 1, each plate 14 is provided with a series of concentric circular grooves 16 of semi-circular cross-section on each face. Corresponding grooves on opposite faces are connected by equidistant bores 15 having a diameter of from 0.2 to 0.5 mm. and a length of from 5 to 7 mm. The plates are juxtaposed in a casing 10 with the bores 15 of adjacent plates misaligned so that a melt of synthetic linear polymer must pass through bores 15 and along capillaries 17, formed by the juxtaposed grooves 16, alternately in passing from a conduit 18 to a spinneret (not shown). The diameters of the bores 15 and of the grooves 17 may decrease progressively from the conduit to the spinnerets. As shown in Fig. 4, plates 20 are each provided with a central bore 22 and radial grooves 23 in the lower face only; they alternate with plates 21 of less diameter each provided with radial grooves 26 in the lower face only, the grooves communicating with a central depression of the same depth. Peripheral vanes (not shown) are provided on the edge of each plate 21 to centre it in the casing 25. Flow is from a conduit 28 through bore 22 of the first plate 20, along grooves 23 in its lower face to an annular space 27, along grooves 26 in the lower face of the first plate 21, and into the central bore 22 of the second plate 20, and so on. The cross-sections of the channels formed by the juxtaposition of grooves 23 or 26 with the ungrooved faces are of the same order as those in Fig. 1 and may similarly decrease towards the spinneret. The material of the plates may be (stainless) nickel-chrome steel to resist corrosion by washing-agents such as nitric acid. Perforate screens may be combined with or alternated with the plates or may be located p before or after them.
GB7240/53A 1952-03-28 1953-03-16 Improved filtering device for use in the spinning of synthetic linear polymers Expired GB735788A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT735788X 1952-03-28

Publications (1)

Publication Number Publication Date
GB735788A true GB735788A (en) 1955-08-31

Family

ID=11315330

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7240/53A Expired GB735788A (en) 1952-03-28 1953-03-16 Improved filtering device for use in the spinning of synthetic linear polymers

Country Status (4)

Country Link
US (1) US2792122A (en)
FR (1) FR1072897A (en)
GB (1) GB735788A (en)
NL (2) NL96182C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971219A (en) * 1956-08-14 1961-02-14 Du Pont Mixer distribution plate

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923970A (en) * 1960-02-09 genovese
US3050774A (en) * 1957-09-03 1962-08-28 Du Pont Spinneret assembly
US2999274A (en) * 1958-04-14 1961-09-12 Phillips Petroleum Co Dispersing solid additives in plastics
US3245113A (en) * 1963-06-10 1966-04-12 American Cyanamid Co Apparatus for forming multi-component fibers
DE1660209A1 (en) * 1965-07-15 1970-02-05 Barmag Barmer Maschf Melt spinning head for spinning under high pressure
US3320633A (en) * 1965-08-25 1967-05-23 Du Pont Apparatus for forming two component yarns
DE1286261B (en) * 1967-05-22 1969-01-02 Vickers Zimmer Ag Spinning device
US3737036A (en) * 1970-08-26 1973-06-05 Bendix Corp Filter for polymer processing and method of manufacture
IT1015100B (en) * 1974-06-17 1977-05-10 Montedison Spa PROCEDURE AND RELATED EQUIPMENT FOR THE EXTRUSION OF PROFILES OF PARTICULAR THERMOPLASTIC MATERIALS OF SHEETS AND PROFILES SI MILES
CA1072281A (en) * 1976-03-24 1980-02-26 Jobst U. Gellert Injection molding filter assembly
EP0164206B1 (en) * 1984-05-02 1988-11-02 Brendan James Hamill An apparatus for the chemical synthesis of oligonucleotides
US4918807A (en) * 1988-10-19 1990-04-24 A. Ahlstrom Corporation Screen and method of manufacture
DE19643425C2 (en) * 1996-10-22 1999-12-02 Geb Schroeder Beeck Sandless spinneret
US6033609A (en) * 1997-10-28 2000-03-07 Basf Corporation Device and method to prevent spinneret hole contamination
US11684874B2 (en) * 2020-12-29 2023-06-27 Metal Industries Research & Development Centre Tangential flow filtration module and tangential flow filtration assembly

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE257144C (en) *
US1262317A (en) * 1917-11-12 1918-04-09 John H V Finney Carbureter attachment.
US1788412A (en) * 1922-01-24 1931-01-13 Sperry Dev Co Oil engine
US1456438A (en) * 1922-07-28 1923-05-22 Hesselman Knut Jonas Elias Liquid filter
GB322764A (en) * 1928-07-06 1929-12-06 British Celanese Improvements in or relating to the manufacture of artificial filaments, threads, films or the like
GB324034A (en) * 1928-10-13 1930-01-13 Albert Schrempp Improved filter device
FR666474A (en) * 1928-12-28 1929-10-02 Automotive Carburetor Filter Regulator
US2284787A (en) * 1938-04-08 1942-06-02 Winkler Jack Filter
US2266363A (en) * 1938-11-10 1941-12-16 Du Pont Apparatus for the production of filaments
NL55019C (en) * 1938-11-10
US2449809A (en) * 1939-01-12 1948-09-21 Johnson & Johnson Corrugated disk filter
US2345014A (en) * 1941-10-20 1944-03-28 Stamsvik Mfg Corp Filtration unit
US2507355A (en) * 1946-01-17 1950-05-09 Sola Giuseppe Filter for injectors for combustion engines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971219A (en) * 1956-08-14 1961-02-14 Du Pont Mixer distribution plate

Also Published As

Publication number Publication date
NL96182C (en)
US2792122A (en) 1957-05-14
FR1072897A (en) 1954-09-16
NL177215B (en)

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