US2289232A - Method and apparatus for producing filamentary structures - Google Patents

Method and apparatus for producing filamentary structures Download PDF

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Publication number
US2289232A
US2289232A US284569A US28456939A US2289232A US 2289232 A US2289232 A US 2289232A US 284569 A US284569 A US 284569A US 28456939 A US28456939 A US 28456939A US 2289232 A US2289232 A US 2289232A
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US
United States
Prior art keywords
yarn
draw
cold
pin
snubbing
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
US284569A
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English (en)
Inventor
Babcock Dale Friend
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
Priority to US284569A priority Critical patent/US2289232A/en
Priority to US284556A priority patent/US2291873A/en
Priority to FR865018D priority patent/FR865018A/fr
Priority to NL98346A priority patent/NL57292C/xx
Priority to DEJ1138A priority patent/DE1141409B/de
Priority to GB11711/40A priority patent/GB543466A/en
Application granted granted Critical
Publication of US2289232A publication Critical patent/US2289232A/en
Priority to BE464521D priority patent/BE464521A/xx
Priority to CH270794D priority patent/CH270794A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/227—Control of the stretching tension; Localisation of the stretching neck; Draw-pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/46—Applications of alarms, e.g. responsive to approach of end of line
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/225—Mechanical characteristics of stretching apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/017—Filament stretching apparatus

Definitions

  • This invention relates to the art of forming artificial filaments, and is particularly concerned with improvements in the cold drawing of yarn, i. e., a bundle of filaments, composed of synthetic linear polymers.
  • Linear polymers can be formed directly into filaments from the molten state and the filaments so formed are capable of being cold drawn, i. e., permanently elongated, in the solid state, under the application of stress, into filaments and the like, exhibiting, upon X-ray examination crystallite orientation along the fiber'axis.
  • These colddrawn and oriented filaments possess certain characteristics not possessed by. the filaments previous to the cold drawing, which adapt them to a wide range of utilityin the textile field. The greatest utility is obtained when the filaments are so'* produced as to possess uniform physical characteristics, which, in turn, can be obtained only through uniform drawing of the filaments.
  • draw point as it is used throughout the specification and claims,'is intended to designate that point which is the center of the zone or section of yarn within which the drawing takes place, the draw poin of the yarn, mathematically stated, being that point at which the first derivative of the denier, with respect to yarn length, is a maximum (the second derivative beingequal to zero),
  • .l"lgure 1 is a greatly enlarged diagrammatic elevational view showing the manner in which a filament cold draws upon the application of a suitable tension.
  • Figure 2 is a diagrammatic side elevational View showing an apparatus for the cold drawing of linear polymer yarns and filaments, improved in accordance with the present invention.
  • Figure 3 is a diagrammatic front elevational' view of a section of the apparatus shown in Figure 2 of the drawings.
  • Figure 4 is a diagrammatic side elevational view of another modification of an improved apparatus for the cold drawing of synthetic linear polymer yarns and filaments.
  • Figure 5 is a diagrammatic front elevational view of a part of the apparatus shown in Figure 4 of the drawings.
  • the objects of the invention are accomplished, in general, by cold drawing a bundle of continuous filaments of synthetic linear polymer, e. g. synthetic linear polyamide, which filaments are capable of being permanently elongated to at least 150% of their original length, under such conditions that the draw point of the filaments is maintained within a zone of inch along that portion of the thread which is in contact with the surface of the element or member upon which the drawing down or necking of the filament or yarn occurs.
  • synthetic linear polymer e. g. synthetic linear polyamide
  • Synthetic linear polyamide yarn has, in the past, been cold drawn by passing several wraps of the yarn about a slowly rotating roll and then passing several wraps of the yarn about a rapidly rotating roll, the differential peripheral speed of the rolls determining the amount ofdrawing.
  • yarn is produced having periodic variations in orientation, accompanied by variations in degrees of I dye afiinity. As stated above, these variations are due to a periodic shifting of the draw point.
  • Figures 2 and 5 illustrate the cold drawing drawn. It has been found by experience that if the draw point is maintained within a zone not in excess of inch along the length of the thread, substantial elimination of variations in physical characteristics of the filaments and yarn will be effected.
  • the undrawn yarn II is passed from package I! through a tensioning device l9, around a positively driven feed roller 2i, a very slight tension being imparted by tensionin'g device iii in order to permit an even wrap around roller 2i. passed about separating roller 23 and back around feed roller 2
  • the thread is passed several times around roller 21 and its adjoining separating roller 25 (the last wrap being around roller 2! alone, as shown).
  • the yarn is then passed'through guide 29 and traverse guide 3
  • the yarn is passed about rollers 2
  • the snubbing pin 24 has a diameter up to /2 inch, and preferably has a diameter of from y inch to V4 inch.
  • the yarn is passed about this snubbing pin one or several turns so that the tension developed in the yarn by its passage around the pin will preferably be at least one half the tension required in the drawing operation. It is preferred that the snubbing pin be mounted with a slight downward tilt, as shown in Figure 3, so that successive turns of the yarn about the snubbing pin will remain separated.
  • sustained shift is meant a shifting of the zone in the same direction for a length of time during which a substantial amount of yarn is drawn, e. g., 3 inches to 6 inches of drawn yarn.
  • Motion of the zone may be accomplished by moving the snubbing pin (of Figures 2 and 3) or other form of tension device, according to any type of motion, e. g., rectilinear, circular, elliptical or reciprocal motion.
  • the speed of movement of the snubbing pin or other tension device does not exceed 2% of the linear speed of the undrawn yarn, and the movement of the draw point on the surface of the drawing member is limited to a inch zone, the irregularities in dye aiiinity, denier and other physical characteristics are minor and are not objectionable.
  • Figures 4 and 5 that form of the invention which involves slow movement of the tension device on which drawing occurs is illustrated in Figures 4 and 5, which show an apparatus similar to that shown in Figures 2 and 3 (like numerals designating similar parts) with the exception that the snubbing pin it is slowly shifted or reciprocated according to the manner indicated by the dotted lines shown in those figures.
  • Any desired mechanism can be used for effecting the shifting of pin 24, it being only necessary that the rate at which the snubbing pin is shifted does not exceed 2% of the linear velocity of the yarn prior to being drawn.
  • This form of the invention has the advantage that the snubbing pin 24 can be shifted in such a way as to prevent wear on any particular portion of the pin as would occur in the form of device shown in Figures 2 and 3 wherein a stationary snubbing pin is used.
  • the diameter of the snubhing pin have the dimensions specified in the form shown in Figures 2 and 3.
  • the following example illustrates a specific method for cold-drawing synthetic linear polymer yarns whereby to obtain yarns which have been cold-drawn with such uniformity as to exhibit improved uniformity of physical characteristics
  • Example A ISO-denier, 15-filament, 4-turn Z twist, unoriented polyhexamethylene adipamide yarn is cold drawn on apparatus of the type illustrated in Figures 4 and 5 of the drawings.
  • the pin 24, preferably made of agate, is inch in diameter and 1 inches long, and is rigidly fixed between rolls 2
  • the pin 24 is mounted as shown, so as to divert the yarn away from a line tangential both to rolls 2
  • is wrapped about the snubbing pin two turns and is then passed to the draw M1121 and thence to the wind-up mechanism as previously described.
  • , of the same diameter as draw roll 21, is positively driven at a speed of 12.5 R. P. M. and draw roll 21 is positively driven at a speed of 50 B. P. M.
  • the denier of consecutive 9 cm. lengths of the yarn so drawn is determined and it is found that the denier of these consecutive sections does not deviate from the average by more than denier.
  • This drawn yarn is knit into a fabric and dyed as previously described. In this case the fabric is of very uniform appearance.
  • the preferred species of snubbing pin is an agate pin it; inch in diameter and having a moderately smooth surface.
  • smooth pins of other materials having a diameter up to V inch will also prove satisfactory, e. g., stainless steel, chromium plated steel, Isolantite, alsimag, illium, porcelain, Bakelite, methyl methacrylate resin, etc. If the diameter greatly exceeds inch, the length over which tension is applied becomes increasingly greater.
  • the snubbing pin may be rotated in a direction opposite to the direction of travel of the yarn since it is the snubbing, sliding action which is desired.
  • agate pins arepreferred since surfaces having the desired degree of smoothness can be obtained more readily and the yarn is not as likely to become damaged.
  • the yarn tends to break much more frequently during the operation.
  • the resistance of agate pins to abrasion by the passage of the yarn is very remarkable. Using them, yarn has been drawn at a rate of 50 feet per minute for periods up to several months without showing any apparent wear of the pin as observed by a low power microscope.
  • feed and draw rollers e. g., rollers 2i and 21, of .the same diameter operated at different'rotational speeds to effect drawing of the yarn
  • these rollers may be of different diameters so long as the peripheral speeds of the rollers are sufiiciently different to give the proper drawing ratio.
  • the feed and drawing rollers may be .keyed to the same shaft, in axial alignment, and rotate at the same rotational speed, the drawing ratio being controlled by the relative diameters of the rollers.
  • the separating rollers e. g., rollers'23 and 25, can be disposed above the rollers with which they cooperate, the yarn being led from feed roller about a pin according to this invention, to roller 21.
  • the invention is not limited to the use of feed and/or draw rolls of the type shown in the figures since their sole function is to feed the undrawn or partially drawn yarn and to draw away the drawn yarn at a uniform rate.
  • the use of any conventional mechanism for accomplishing these functions whenused in'accordance with this invention falls within its scope.
  • the invention has been described particularly in terms of continuous filament yarn, it is also applicable to the drawing of staple length filaments and yarn containing the same where great uniformity in the extent of drawing is desired.
  • the invention has been described in terms of the orientation of yarn composed of synthetic linear polymers, and particularly synthetic linear polyamides, it is particularly applicable to the cold drawing of yarn composed of any material which is capable of being permanently elongated to at least 150% of its original length.
  • the invention has been described in terms of the drawing of undrawn yarn, but it is understood that it is equally applicable to the drawing of partially drawn yarn, it being only necessary that the yarn be capable of being drawn at least 150%. It may in many instances be desirable to effect the drawing in two or more stages.
  • the invention has been described particularly for the purpose of obtaining dye uniformity, it is obvious that it is of great value for obtaining improvements in the uniformity of properties other than dye affinity.
  • a process for cold-drawing yarn capable of being permanently elongated at least 150% which comprises feeding the yarn at a uniform rate
  • Apparatus for cold-drawing yarn which comprises a pair of cooperating yarn tensioning rolls, and a snubbing pin between said rolls, said snubbing'pin positioned obliquely to the path of the yarn between the tensioning rolls, whereby to prevent contact between successive turns of yarn about said pin.
  • Apparatus for cold-drawing yarn which comprises a pair of cooperating yarn tensioning rolls, and a snubbing pin between said rolls, and means for moving said pin to different positions between said rolls.
  • Apparatus for cold-drawing yarn which comprises a pair of cooperating yarn tensioning rolls, and a snubbing pin between said rolls, and means for continuously moving said pin to different positions between said rolls.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Brushes (AREA)
US284569A 1939-07-14 1939-07-14 Method and apparatus for producing filamentary structures Expired - Lifetime US2289232A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US284569A US2289232A (en) 1939-07-14 1939-07-14 Method and apparatus for producing filamentary structures
US284556A US2291873A (en) 1939-07-14 1939-07-14 Synthetic filament
FR865018D FR865018A (fr) 1939-07-14 1940-04-17 Procédé et dispositifs pour l'étirage de filaments artificiels
DEJ1138A DE1141409B (de) 1939-07-14 1940-07-13 Verfahren und Vorrichtung zum Kaltrecken von Faeden, Fadenbuendeln od. dgl. aus synthetischen linearen Hoch-polymeren, insbesondere aus Polyamiden
NL98346A NL57292C (en, 2012) 1939-07-14 1940-07-13
GB11711/40A GB543466A (en) 1939-07-14 1940-07-15 Improvements in and relating to the stretching of synthetic filaments and filamentary yarns
BE464521D BE464521A (en, 2012) 1939-07-14 1946-04-12
CH270794D CH270794A (fr) 1939-07-14 1947-07-19 Procédé pour l'étirage à froid de filaments à base de polymères linéaires synthétiques, et appareil pour la mise en oeuvre de ce procédé.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US284569A US2289232A (en) 1939-07-14 1939-07-14 Method and apparatus for producing filamentary structures

Publications (1)

Publication Number Publication Date
US2289232A true US2289232A (en) 1942-07-07

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ID=23090685

Family Applications (1)

Application Number Title Priority Date Filing Date
US284569A Expired - Lifetime US2289232A (en) 1939-07-14 1939-07-14 Method and apparatus for producing filamentary structures

Country Status (7)

Country Link
US (1) US2289232A (en, 2012)
BE (1) BE464521A (en, 2012)
CH (1) CH270794A (en, 2012)
DE (1) DE1141409B (en, 2012)
FR (1) FR865018A (en, 2012)
GB (1) GB543466A (en, 2012)
NL (1) NL57292C (en, 2012)

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455173A (en) * 1946-05-25 1948-11-30 Du Pont Yarn treating apparatus
US2462927A (en) * 1943-11-06 1949-03-01 Du Pont Artificial filaments and yarn
US2474912A (en) * 1946-03-16 1949-07-05 Du Pont Drawtwister
US2627103A (en) * 1947-12-06 1953-02-03 Dan River Mills Inc Method of treating yarn, thread, and the like
US2738144A (en) * 1952-06-25 1956-03-13 Honig Frank Textile package
US2767429A (en) * 1952-05-06 1956-10-23 Du Pont Snubbing pin for drawing yarn
US2771635A (en) * 1951-03-14 1956-11-27 Perfogit Spa Apparatus for stretching filaments
US2778058A (en) * 1950-01-11 1957-01-22 Inventa Ag Filament stretching apparatus
US2851732A (en) * 1953-07-14 1958-09-16 Du Pont Split filament bundle at finish roll
US2853738A (en) * 1952-01-04 1958-09-30 Heinz Weller Jr Apparatus for drawing of synthetic fibres
US2874410A (en) * 1954-06-30 1959-02-24 Du Pont Apparatus for uniformly drawing a plurality of filaments
US2932077A (en) * 1952-06-25 1960-04-12 Honig Frank Apparatus for stressing strand materials
US2941259A (en) * 1956-09-18 1960-06-21 Jr James L Lohrke Filament processing
US2962793A (en) * 1956-11-19 1960-12-06 North American Rayon Corp Yarn stretching device
US2994576A (en) * 1954-09-09 1961-08-01 Celanese Corp Process for spinning polyvinyl alcohol filaments and remaining impurities therefrom
US3001236A (en) * 1957-07-26 1961-09-26 Bayer Ag Hot stretching of polyacrylonitrile yarns with draw point located on feed roller
US3002804A (en) * 1958-11-28 1961-10-03 Du Pont Process of melt spinning and stretching filaments by passing them through liquid drag bath
US3003222A (en) * 1958-11-17 1961-10-10 Du Pont Controlled relaxation of freshly drawn nylon
US3067481A (en) * 1958-02-04 1962-12-11 American Enka Corp Flaw detecting and thread tensioning device
US3068530A (en) * 1960-11-03 1962-12-18 Du Pont Improved method of operating a heated draw pin with synthetic yarns
US3069745A (en) * 1958-03-12 1962-12-25 Barmag Barmer Maschf Stretch-spooling machines
US3069747A (en) * 1958-03-04 1962-12-25 Du Pont Shaped products
US3073001A (en) * 1958-10-21 1963-01-15 Du Pont Apparatus for cold-drawing yarn
US3088792A (en) * 1959-06-29 1963-05-07 American Enka Corp Thermoplastic yarns
US3090997A (en) * 1958-11-26 1963-05-28 Du Pont Method of continuous treatment of as-spun birefringent polyamide filaments
US3091015A (en) * 1955-06-30 1963-05-28 Du Pont Drawing of nylon
US3093444A (en) * 1961-07-10 1963-06-11 Du Pont Process of preparing a helically crimped polypropylene filament
US3102323A (en) * 1958-08-26 1963-09-03 Du Pont Textile
US3103407A (en) * 1959-11-25 1963-09-10 Process of drawing melt spun polyester yarns
US3116197A (en) * 1956-08-31 1963-12-31 Du Pont Nubbed filament and dyed fabric of same
US3118723A (en) * 1961-02-08 1964-01-21 Arthur J I Harding Process for dyeing nylon to produce multi-colored dyeings
US3124632A (en) * 1961-04-10 1964-03-10 Phocess for treating nylon
US3144680A (en) * 1960-10-13 1964-08-18 Du Pont Apparatus for heating undrawn yarn for drawing
US3145947A (en) * 1962-08-13 1964-08-25 Techniservice Corp Unwinding strand from a traversewound package or the like
US3154807A (en) * 1960-10-21 1964-11-03 Inventa Ag Apparatus and process for stretching textile threads of synthetic linear polyamides
US3212158A (en) * 1956-08-31 1965-10-19 Du Pont Process for producing speckled fabric
US3217355A (en) * 1963-11-04 1965-11-16 Monsanto Co Roll wrap preventer
US3233019A (en) * 1962-08-07 1966-02-01 Du Pont Process of multiple neck drawing while simultaneously infusing modifying agent
US3266082A (en) * 1962-12-19 1966-08-16 Heplon Inc Tow stretcher
DE1260678B (de) * 1961-04-10 1968-02-08 Monsanto Co Vorrichtung zum Strecken von Textilfaeden
US3483593A (en) * 1965-03-25 1969-12-16 Ici Ltd Drawing apparatus
US3500519A (en) * 1968-04-01 1970-03-17 Techniservice Corp Strand treatment
US3681826A (en) * 1970-10-05 1972-08-08 Ici Ltd Drawing synthetic thermoplastic yarn
US4328756A (en) * 1978-03-27 1982-05-11 Boyd Gene A Sewing machine thread tension control system
EP0298316A3 (en) * 1987-07-04 1990-11-14 Barmag Ag Drawing apparatus for synthetic yarns
US5046225A (en) * 1989-02-24 1991-09-10 Rieter Machine Works, Ltd. Drawing bath
US5137676A (en) * 1990-10-10 1992-08-11 E. I. Du Pont De Nemours And Company Process for increasing the handling control of a bundle of wet yarns
US5136763A (en) * 1990-12-18 1992-08-11 E. I. Du Pont De Nemours And Company Process for the production of uniform yarns via reduced tension-induced slippage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944079C (de) * 1944-10-28 1956-06-07 Hoechst Ag Verfahren zur Herstellung von gleichmaessig profilierten Draehten aus Polyamiden
DE976270C (de) * 1950-07-22 1963-07-04 Polymer Corp Verfahren zum Behandeln eines rohrfoermigen oder vollen Profilstranges aus Polyamid
DE1209239B (de) * 1956-10-29 1966-01-20 Trikotfabriken J Schiesser A G Verfahren zum Verstrecken eines schmelzgesponnenen Hohlfadens
DE3705105A1 (de) * 1986-03-04 1987-09-17 Barmag Barmer Maschf Streckeinrichtung fuer synthetische faeden

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE517324C (de) * 1931-02-05 Herminghaus & Co G M B H Vorrichtung zur Herstellung wasserfester Erzeugnisse aus Viskoseloesungen
DE530508C (de) * 1931-07-29 Zellstoff Textilwerke G M B H Verfahren zur Herstellung von Kunstseide
GB312114A (en) * 1928-02-18 1929-05-21 Tomenosuke Muto Improvements in the process of obtaining artificial threads of natural silk from colloidal solutions of natural silk
US2045530A (en) * 1932-01-14 1936-06-23 Skenandoa Rayon Corp Method and apparatus for manufacturing artificial silk
NL38614C (en, 2012) * 1933-10-13
US2137235A (en) * 1937-02-15 1938-11-22 Du Pont Shaped articles from polymeric materials

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462927A (en) * 1943-11-06 1949-03-01 Du Pont Artificial filaments and yarn
US2474912A (en) * 1946-03-16 1949-07-05 Du Pont Drawtwister
US2455173A (en) * 1946-05-25 1948-11-30 Du Pont Yarn treating apparatus
US2627103A (en) * 1947-12-06 1953-02-03 Dan River Mills Inc Method of treating yarn, thread, and the like
US2778058A (en) * 1950-01-11 1957-01-22 Inventa Ag Filament stretching apparatus
US2771635A (en) * 1951-03-14 1956-11-27 Perfogit Spa Apparatus for stretching filaments
US2853738A (en) * 1952-01-04 1958-09-30 Heinz Weller Jr Apparatus for drawing of synthetic fibres
US2767429A (en) * 1952-05-06 1956-10-23 Du Pont Snubbing pin for drawing yarn
US2932077A (en) * 1952-06-25 1960-04-12 Honig Frank Apparatus for stressing strand materials
US2738144A (en) * 1952-06-25 1956-03-13 Honig Frank Textile package
US2851732A (en) * 1953-07-14 1958-09-16 Du Pont Split filament bundle at finish roll
US2874410A (en) * 1954-06-30 1959-02-24 Du Pont Apparatus for uniformly drawing a plurality of filaments
US2994576A (en) * 1954-09-09 1961-08-01 Celanese Corp Process for spinning polyvinyl alcohol filaments and remaining impurities therefrom
US3091015A (en) * 1955-06-30 1963-05-28 Du Pont Drawing of nylon
US3212158A (en) * 1956-08-31 1965-10-19 Du Pont Process for producing speckled fabric
US3116197A (en) * 1956-08-31 1963-12-31 Du Pont Nubbed filament and dyed fabric of same
US2941259A (en) * 1956-09-18 1960-06-21 Jr James L Lohrke Filament processing
US2962793A (en) * 1956-11-19 1960-12-06 North American Rayon Corp Yarn stretching device
US3001236A (en) * 1957-07-26 1961-09-26 Bayer Ag Hot stretching of polyacrylonitrile yarns with draw point located on feed roller
US3067481A (en) * 1958-02-04 1962-12-11 American Enka Corp Flaw detecting and thread tensioning device
US3069747A (en) * 1958-03-04 1962-12-25 Du Pont Shaped products
US3069745A (en) * 1958-03-12 1962-12-25 Barmag Barmer Maschf Stretch-spooling machines
US3102323A (en) * 1958-08-26 1963-09-03 Du Pont Textile
US3073001A (en) * 1958-10-21 1963-01-15 Du Pont Apparatus for cold-drawing yarn
US3003222A (en) * 1958-11-17 1961-10-10 Du Pont Controlled relaxation of freshly drawn nylon
US3090997A (en) * 1958-11-26 1963-05-28 Du Pont Method of continuous treatment of as-spun birefringent polyamide filaments
US3002804A (en) * 1958-11-28 1961-10-03 Du Pont Process of melt spinning and stretching filaments by passing them through liquid drag bath
US3088792A (en) * 1959-06-29 1963-05-07 American Enka Corp Thermoplastic yarns
US3103407A (en) * 1959-11-25 1963-09-10 Process of drawing melt spun polyester yarns
US3144680A (en) * 1960-10-13 1964-08-18 Du Pont Apparatus for heating undrawn yarn for drawing
US3154807A (en) * 1960-10-21 1964-11-03 Inventa Ag Apparatus and process for stretching textile threads of synthetic linear polyamides
US3068530A (en) * 1960-11-03 1962-12-18 Du Pont Improved method of operating a heated draw pin with synthetic yarns
US3118723A (en) * 1961-02-08 1964-01-21 Arthur J I Harding Process for dyeing nylon to produce multi-colored dyeings
US3124632A (en) * 1961-04-10 1964-03-10 Phocess for treating nylon
DE1260678B (de) * 1961-04-10 1968-02-08 Monsanto Co Vorrichtung zum Strecken von Textilfaeden
US3093444A (en) * 1961-07-10 1963-06-11 Du Pont Process of preparing a helically crimped polypropylene filament
US3233019A (en) * 1962-08-07 1966-02-01 Du Pont Process of multiple neck drawing while simultaneously infusing modifying agent
US3145947A (en) * 1962-08-13 1964-08-25 Techniservice Corp Unwinding strand from a traversewound package or the like
US3266082A (en) * 1962-12-19 1966-08-16 Heplon Inc Tow stretcher
US3217355A (en) * 1963-11-04 1965-11-16 Monsanto Co Roll wrap preventer
US3483593A (en) * 1965-03-25 1969-12-16 Ici Ltd Drawing apparatus
US3500519A (en) * 1968-04-01 1970-03-17 Techniservice Corp Strand treatment
US3681826A (en) * 1970-10-05 1972-08-08 Ici Ltd Drawing synthetic thermoplastic yarn
US4328756A (en) * 1978-03-27 1982-05-11 Boyd Gene A Sewing machine thread tension control system
EP0298316A3 (en) * 1987-07-04 1990-11-14 Barmag Ag Drawing apparatus for synthetic yarns
US5046225A (en) * 1989-02-24 1991-09-10 Rieter Machine Works, Ltd. Drawing bath
US5137676A (en) * 1990-10-10 1992-08-11 E. I. Du Pont De Nemours And Company Process for increasing the handling control of a bundle of wet yarns
US5136763A (en) * 1990-12-18 1992-08-11 E. I. Du Pont De Nemours And Company Process for the production of uniform yarns via reduced tension-induced slippage

Also Published As

Publication number Publication date
NL57292C (en, 2012) 1946-04-15
CH270794A (fr) 1950-09-30
BE464521A (en, 2012) 1946-05-31
GB543466A (en) 1942-02-26
DE1141409B (de) 1962-12-20
FR865018A (fr) 1941-05-12

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