GB1237360A - Method and apparatus for preparing staple length filaments of a foamed synthetic polymer - Google Patents

Method and apparatus for preparing staple length filaments of a foamed synthetic polymer

Info

Publication number
GB1237360A
GB1237360A GB33957/69A GB3395769A GB1237360A GB 1237360 A GB1237360 A GB 1237360A GB 33957/69 A GB33957/69 A GB 33957/69A GB 3395769 A GB3395769 A GB 3395769A GB 1237360 A GB1237360 A GB 1237360A
Authority
GB
United Kingdom
Prior art keywords
filament
sheath
filaments
liquid
velocity
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
GB33957/69A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1237360A publication Critical patent/GB1237360A/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
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/26—Formation of staple fibres
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
    • D01G1/02—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form
    • D01G1/04—Severing continuous filaments or long fibres, e.g. stapling to form staple fibres not delivered in strand form by cutting

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

1,237,360. Producing staple fibres of foamed synthetic polymers. E. I. DU PONT DE NEMOURS & CO. 4 July, 1969 [22 July, 1968], No. 33957/69. Heading B5B. [Also in Division C3] Staple fibres of low-density foamed synthetic polymers are produced by continuously extruding a foamable composition through at least one orifice of a spinneret into a moving gaseous sheath to produce at least one continuous, foamed, solid, polymeric filament; continuously flowing the sheath about the filament or filaments generally along the extrusion direction, the velocity of the sheath being increased along the extrusion direction from a velocity less than the linear rate of filament travel in the region of the spinneret to a velocity exceeding the linear rate of filament travel at a position spaced from the spinneret, whereby the filament or plurality of filaments is directed centrally within the sheath and caused to travel parallel to the extrusion direction, the crosssectional area of the sheath at the said spaced position being at least ten times greater than the total cross-sectional area of the filament or plurality of the filaments; cutting the or each filament by impact with at least one blade caused to move in a circular path in a plane which intersects the extrusion path within about 0À5 inch beyond said spaced position, the linear blade velocity at the point of impact cutting being much greater than the rate of filament travel at the point of impact cutting and conveying the cut filament or plurality of filaments away from the blade along the extrusion direction within the continuing stram of gas constituting the sheath. The foamable composition may be a solution of the polymer in an organic liquid at a temperature above the normal boiling point of the liquid and the sheath may consist essentially of the vapour of the organic liquid. The vapour of the liquid may be continuously separated from the cut filaments and recirculated. The filaments may be comprised of polyethylene terephthalate. The liquid may be methylene chloride.
GB33957/69A 1968-07-22 1969-07-04 Method and apparatus for preparing staple length filaments of a foamed synthetic polymer Expired GB1237360A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74635368A 1968-07-22 1968-07-22

Publications (1)

Publication Number Publication Date
GB1237360A true GB1237360A (en) 1971-06-30

Family

ID=25000472

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33957/69A Expired GB1237360A (en) 1968-07-22 1969-07-04 Method and apparatus for preparing staple length filaments of a foamed synthetic polymer

Country Status (4)

Country Link
US (1) US3596319A (en)
DE (1) DE1937215A1 (en)
GB (1) GB1237360A (en)
NL (1) NL6911226A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771981A (en) * 1972-08-28 1973-11-13 Owens Corning Fiberglass Corp Apparatus for severing and depositing glass fibers
US4230471A (en) * 1973-03-30 1980-10-28 Saint-Gobain Industries Suppression of pollution in mineral fiber manufacture
US3907477A (en) * 1974-02-26 1975-09-23 Us Energy Apparatus for producing laser targets
DE3105877A1 (en) * 1981-02-18 1982-09-02 Neumünstersche Maschinen- und Apparatebau GmbH (Neumag), 2350 Neumünster STACKING FIBER CUTTER
DE3108096A1 (en) * 1981-03-04 1982-09-16 Neumünstersche Maschinen- und Apparatebau GmbH (Neumag), 2350 Neumünster STACKING FIBER CUTTER
FR2540893B1 (en) * 1983-02-16 1985-11-08 Rhone Poulenc Fibres SIMPLIFIED METHOD FOR HIGH SPEED POLYAMIDE SPINNING
US5063002A (en) * 1988-07-27 1991-11-05 Exxon Chemical Patents Inc. Method for producing an elastomeric crumb using gas to first cut an extruded hot, sticky elastomeric extrudate material, form the crumb, and then convey it away
US5304055A (en) * 1991-11-27 1994-04-19 Nabisco, Inc. Apparatus and methods for the production of three-dimensional food products
US5529594A (en) * 1994-04-28 1996-06-25 Stir-Melter, Inc. Method for producing mineral fibers having gaseous occlusions
US6148641A (en) * 1998-12-18 2000-11-21 Ppg Industries Ohio, Inc. Apparatus and method for producing dried, chopped strands
US7883735B2 (en) * 2006-08-07 2011-02-08 Kellogg Company Apparatus and method for curled extrudate
DE102007052586A1 (en) * 2007-11-03 2009-05-07 Schmidt & Heinzmann Gmbh & Co. Kg cutter
US10099435B2 (en) * 2015-06-04 2018-10-16 Ford Global Technologies, Llc Method of splitting fiber tows

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2252684A (en) * 1938-08-09 1941-08-19 Du Pont Apparatus for the production of artificial structures
US2396752A (en) * 1942-02-23 1946-03-19 Fred M Roddy Method for dissolving organic solids with organic liquids
US3325906A (en) * 1965-02-10 1967-06-20 Du Pont Process and apparatus for conveying continuous filaments
US3336634A (en) * 1966-04-22 1967-08-22 Du Pont Quenching chimney

Also Published As

Publication number Publication date
NL6911226A (en) 1970-01-26
US3596319A (en) 1971-08-03
DE1937215A1 (en) 1970-05-27

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