US2917779A - Process for preparing improved thin shaped structures, such as filaments or foils, from linear polyesters - Google Patents

Process for preparing improved thin shaped structures, such as filaments or foils, from linear polyesters Download PDF

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Publication number
US2917779A
US2917779A US583380A US58338056A US2917779A US 2917779 A US2917779 A US 2917779A US 583380 A US583380 A US 583380A US 58338056 A US58338056 A US 58338056A US 2917779 A US2917779 A US 2917779A
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Prior art keywords
structures
filaments
plastic
plasticizer
linear polyesters
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Expired - Lifetime
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US583380A
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English (en)
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Kurzke Herbert
Sattler Helmut
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Hoechst AG
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Hoechst AG
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    • 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
    • D02J1/228—Stretching in two or more steps, with or without intermediate steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • 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
    • D01D5/20—Formation of filaments, threads, or the like with varying denier along their length
    • 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
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • 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
    • D02J1/221—Preliminary treatments
    • 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
    • D02J1/223—Stretching in a liquid bath
    • 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
    • Y10S260/00—Chemistry of carbon compounds
    • Y10S260/23—Fiber

Definitions

  • the present invention relates to a process for preparing improved thin shaped structures, such as filaments or foils, from linear polyesters.
  • the polymerization products in the fused mass or in solution are converted into the shaped structures.
  • filaments are obtained by forcing the material through a nozzle provided with holes
  • foils are produced by forcing the material through a nozzle provided with a slit.
  • These preshaped structures are drawn off the nozzles by means of which they have been produced, and collected on bobbins, rollers or the like.
  • the products are stretched, using appropriate devices at room temperature or at a raised temperature, to a multiple of their original dimensions, thus imparting to the products a lasting molecular orientation and consequently a high strength.
  • the above mentioned process becomes considerably less economical when particularly thin shaped structures from linear polyesters are to be produced, for example thin filaments, ribbons or foils.
  • the rate at which the articles are produced cannot be simply accelerated beyond an upper limit, which in the case of filaments, for example, generally amounts to about 1000 m./min., so that a considerably greater number of manufacturing devices working at the same time, for example spinning devices, is required.
  • the shaped structures obtained by the known processes display over their entire length uniform cross sections of a very simple form. Filaments from polyesters possess circular cross sections, and foils from polyesters are of uniform thickness. In numerous cases it is of advantage in industry to use structures from linear polyesters the cross sections of which differ from the normal form. There may be desired, for example, cross sections which are uniform in the longitudinal d'mension of the shaped structures but not round nor of uniform thickness. There are also required structures having cross sections which vary periodically or aperiodically in form and/or area, for example certain effect threads.
  • Shaped structures from linear polyesters the cross sections of wh ch differ from the normal ones have hitherto been obtained by forcing the fused mass through nozzles provided with noncircular holes or not plane parallel slits. Varying cross sections are obtained by periodically influencing the formation of the structures, for example by provoking variations in spinning pressure or using mechanically oscillating spinneret plates.
  • the invention further provides a simple process for the preparation of thin shaped structures from linear polyesters in which thick shaped structures are converted into thinner ones, thus substantially reducing the number of shaping devices required per unit of quantity of structures to be produced. Since as starting material thick shaped structures are used, shaping devices of simpler construction which can be handled more easily can be used. Furthermore, such a process enables thick structureswhich have been obtained in any desired way, for example small ribbons, shaped foils or the like, to be converted into thin structures of similar shape.
  • the shaped non-stretched structures are plasticized, additionally deformed in the plastic state without molecular orientation and subsequently subjected in the usual manner in the non-plastic state to orienting drawing while maintaining the add tional formation.
  • the second order transition point is the temperature at which nonuniformities in the dependency of thermodynamic values on the temperature occur. Said temperature is generally with n the range from 65 C. to 70 C. The plastic stretching by which no molecular orientation is imparted is thus carried out according to the process of the above US. application at temperatures above C. and below C.
  • the plasticizing temperature is between 120 C. and 160 C., that is to say above 100 C., and can therefore only be obtained by means of hot air, s ecial liquid baths or hot contact surfaces. Large quantities of material which are to be treated simultaneously cannot be easily heated with hot air or hot surfaces. When liquid baths are used the removal of the remainders of the liquid 3 of the bath from the final products involves additional inconvenience.
  • shaped non-stretched structures from linear polyesters become plastic at a temperature between the second order transition point and the apparent minimum crystallization point by means of water or steam and in this plastic state can be subjected to plastic deformation in at least one dimension Without molecular orientation.
  • the structures can be oriented by drawing in the non-plastic state, while cold or hot, and yield final products which, as regards their strength values, are equal or even superior to those obtained in known manner.
  • the structures are automatically reconverted from the plastic state into the normal non-plastic state as soon as at least one of the two requirements necessary for producing the plastic state no longer prevails, for example when the temperature of the structure drops below the second order transition point.
  • the process of the invention further provides a process for the manufacture of one or two dimensional structures from linear polyesters in which the shaped structures are drawn oh the shaping device, wound up if desired, and then subjected to orienting drawing.
  • the shaped structures After being drawn off the shaping device the shaped structures are plasticized in the non-stretched state at a temperature between the second order transition point and the apparent minimum crystallization point by means of water or steam as plasticizer.
  • the structures are plastically deformed by mechanical means without molecular orientation in a direction deviating from the longitudinal dimension f the structures and subsequently drawn in the non-plastic state, whereby the molecules are oriented.
  • the additional plastic deformation may be uniform or vary periodically. it is, however, also possible plasticallyto deform the-structures not only in a direction deviating from the direction of motion but also simultaneously or immediately thereafter in the direction of motion.
  • the process of the invention offers considerable advantages. For example, it is no longer necessary to use newly manufactured struc ures. Several months old structures can also be plae deformed.
  • the plastic non-orienting deformation is carried out at a temperature between 70 and 100 C., which temperature .can be easily obtained. It is of special importance that the final products possess a strength usual in common structures from linear polyesters which have been obtained without plasticizing deformation. In the case of filaments from polyethylene terephthalate, for example, the strength amounts to 5-6 g./ denier.
  • the procedure of permanent plastic deformation is determined by the residence time of the material in the hot medium. After a sufficient long time of stay plastic deformation takes place without molecular orientation of the structure. There even occurs removal of or at least a considerable decrease in the molecular preorientation resulting from the manufacturing process of the structures.
  • non-orienting plastic stretching or partially orientaing drawing takes place depends on the time of stay in the plasticizer, its nature and temperature.
  • a drawing to 2.5 times the original length associated with 2 seconds of stay in water at C. results, for example, in a marked laminated orientation, while with a drawing to 4.2 times the original length and a time of stay of 15 seconds in steam no orientation occurs.
  • a longer time of stay is required for the non-orienting deformation. Since it is of advantage to proceed at a fairly short time to stay, the temperature of plasticizer must be near the apparent minimum crystallization point.
  • the non-stretched structures are plasticized as follows:
  • the structures such'as filaments and foils are obtained in the usual manner by means of appropriate devices, generally nozzles, drawn off said devices and, if desired, wound on to the storage bobbins or rollers.
  • the structures are then introduced into steam or water of a temperature above 70 C., preferably 95 C., and plastically deformed in at least one dimension without molecular orientation after a predetermined time of stay.
  • steam is used as plasticizer the structures may be previously treated with a wetting agent.
  • the plasticizer is water, the latter may contain a wetting agent.
  • the plastic deforming process can be carried out continuously due to the relatively short time of stay.
  • the structures are subsequentially subjected to a molecular orientation by drawing as usual.
  • the plastic deformation may be a plastic stretching or may be effected by mechanical means, both taking place in a direction deviating from the longitudinal dimensions of the structures.
  • stretching without orientation in the plasticizer may be carried out to almost any enlargement of the longitudinal dimensions of the structures, in filaments, for example, to 15-20 times the original length.
  • thin shaped structures can be obtained from thicker ones.
  • a smaller number of shaping devices is required than in the known processes or if an equal number of shaping devices is used the capacity is increased in accordance with the ratio of plastic stretch without orientation.
  • the shaping devices can be constructed in a considerably simpler manner since only relatively thick structures are to be produced. It is a further essential advantage of the process of the invention that it facilitates the production of thin structures of special form such as small ribbons, filaments of noncircular cross section, foils of varying thickness, etc. Such elfects can be obtained with thicker structures in a relatively easy way, for example by noncircular or profile nozzles, whereas thin structures exhibiting such effects can scarcely be obtained directly.
  • the special form of the shaped starting material is not destroyed by the plastic deformation.
  • Fig. 1 is a side elevation partially in section of one such apparatus
  • Fig. 2 illustrates a modification of Fig. 1.
  • Fig. 1 illustrates a device for the plastic deformation of a filament between smooth rolls.
  • Case 1 is filled with a plasticizer, such as steam.
  • the case contains two smooth rolls 2 and 3 which turn in opposite directions, thus conveying between them filament 4 which enters the case by opening 5 and leaves it by opening 6.
  • the distance between the surfaces of the rolls 2 and 3 is smaller than the diameter of the filament entering the case. Due to the action of the plasticizer contained in the case the filament becomes plastic and it is pressed together by the two rolls to form a ribbon.
  • Pig. 2 shows a device for the plastic formation of a filament between grooved rolls.
  • Case 14 is filled with a plasticizer, such as steam.
  • the case contains two rolls 7 and 8 whose convex surfaces are provided with notches 9, which are parallel with the axis. The rolls turn in opposite directions thus conveying filament 10 which enters the case by opening 13and leaves it by opening 11.
  • the distance between the projecting parts of the convex surfaces of the two rolls is smaller than the diameter of the non-shaped filament.
  • the filament is provided at certain intervals with notches 12 which are preserved even after the filament has been stretched with orientation.
  • plastic deformation can also be effected by any other mechanical periodic transverse compression of the plastic filament, for example by means of a hammer mill or a similar device.
  • foils can beprepared that display optical effects which are interesting with a view to proceising.
  • the structures can be plastically stretched according to another mode of executing the process of the invention in longitudinal direction without molecular orientation, in the plasticizer and prior to the orienting drawing. By doing so, particularly thin, additionally shaped structures are obtained. 1
  • the process of the invention is of special importance for shaping filaments from polymethyleneterephthalates, particularly polyethtylene terephthalate.
  • the process is, however, also applicable to all fiber-forming synthetic linear polyesters, including those containing small portions of other modifying substances.
  • terephthalates there can be used instead of a small quantity of ethylene glycol, another glycol such as 1,4-b'utanediol or hexamethylene glycol or another dicarboxylicacid such as adipic acid, sebacic acid, naphthalene-2,7-dicarboxylic acid, or isophthalic acid.
  • process of the invention may further be used for preparing filaments or foils from polyesters obtained from hydroxycarboxylic acids such as para-w-hydroxybutoxybenzoic acid or hydroxypivalic acid.
  • Example 1 A non-stretched filament from polyethylene terephthalate consisting of 18 individual filaments and having a total titer of 200 deniers is continuously stretched without orientation to four times it original length in a water bath at 95 C.
  • a pre-orientation is imparted to the rayon characterized by a double refraction of 3.8x l0
  • the double refraction decreases to 1.5 X10- and the preorientation decreases accordingly.
  • the stretched filament is drawn in the cold to four times its original length, thus being oriented. In this manner a filament is obtained having a final titer of 12.5 deniers and consisting of 18 individual filaments, i.e. possessing an individual titer of 0.7 denier.
  • the product shows a strength of 6 grams/denier.
  • Example 3 A non-stretched monofil from polyethylene terephthalate having a titer of 50 deniers is plasticallystretched to 2.5 times its original length in a water bath at 95 C. The stretching is carried out so rapidly as to be finished after a time of stay of 2 seconds in the plasticizer. Subat the exterior of the filament and to l7 10- in the interior of the filament, whereas the double refraction of the non-treated filament is 2.5 l0- throughout.
  • Example 7 A non-stretched monofil of 50 deniers from polyethylene terephthalate is plasticized in a water bath at 95 C. with a time stay of 20 seconds and conveyed in the plasticizing bath by means of unrufiled rolls. The filament is subsequently subjected to orienting drawing. In this manner a small ribbon is obtained having a titer of deniers and a tensile strength of 4 grams/ denier. The ribbon has a cross section the breadth of which is to the thickness as 5:1.
  • Example 8 A non-stretched monofil of 50 deniers from polyethylene terephthalate is plasticized in a water bath at 95 C. with a time of stay of 20 seconds, the material being conveyed in the bath between unruffied rolls. Subsequently the monofil is permanently stretched in the plasticizing bath Without molecular orientation in the ratio of 1:2.5 by being drawn oil the unrufi'led rolls. The filament is subsequently oriented by drawing. A filament having the form of a small ribbon is obtained which possesses a titer of 4 deniers, an elongation at break of 4 grams/denier and a cross section profile of 1:5.
  • Example 9 A non-stretched monofil of 50 deniers from polyethylene terephthalate is p lasticized in a water bath of 95 C., the material being conveyed in the water bath by means of fluted rolls. After orienting drawing, the titer of the filament displays short periodic variations in the ratio of 1:2.
  • yarns, films and like structures of synthetic, linear, polyesters in which process the structures are drawn off a shaping device and then subjected to a molecular orienting drawing, the step which comprises plasticizing the nonstretched structures by means of steam as plasticizer at a temperature between the second order transition point of the amorphous polyester in the nonplas'ticized state and its apparent minimum crystallization point, subjecting the structures in the plastic state to permanent plastic deformation in at least one direction without molecular orientation, and subsequently subjecting the structures in a non-plastic state to a molecular orienting drawing.
  • the step which comprises plasticizing the nonstretched structures by means of water as plasticizer at a temperature between the second order transition point of the amorphous polyester in the non-plasticized state and its apparent minimum crystallization point, subjecting the structures in the plastic state to permanent plastic deformation in at least one direction without molecular orientation, and subsequently subjecting the structures in a non-plastic state to a molecular orienting drawing.
  • the step which comprises plasticizing the non-stretched structures by means of steam as plasticizer at a temperature between the second order transition point of the amorphous polyester in the non-plasticized state and its apparent minimum crystallization point, subjecting the structures in the plastic state to permanent plastic deformation in at least one direction without molecular orientation, and subsequently subjecting the structures in a non-plastic state to a molecular orienting drawing.
  • the step which comprises plasticizing the nonstretched structures by means of steam as plasticizer at a temperature between the second order transition point of the amorphous polyester in the non-plasticized state and its apparent minimum crystallization point, subjecting the structures in the plastic state to a plastic stretching in at least one direction without molecular orientation, and subsequently subjecting the structures in a non-plastic state to a molecular orienting drawing.
  • the step which comprises plasticizing the non-stretched structures by means of steam as plasticizer at a temperature between the second order transition point of the amorphous polyester in a non-plasticized state and its apparent minimum crystallization point, subjecting the structures in the plastic state to a plastic deformation by mechanical action, without molecular orientation, in a direction deviating from the longitudinal direction of the structures and subsequently subjecting the structures in a non-plastic state to a molecular orienting drawing.
  • the step which comprises plasticizing the non-stretched structures by means of steam as plasticizer at a temperature between the second order transition point of the amorphous polyester in the non-plasticized state and its apparent minimum crystallization point, subjecting the structures in the' plastic state, without molecular orientation, to a plastic stretching in their longitudinal direction and simultaneously to a plastic deformation, without molecular orientation, in a direction deviating from the longitudinal direction of the structures and subsequently subjecting the structures in a non-plastic state to a molecular orienting drawing.
  • the step which comprises plasticizing the non-stretched structures by means of steam as plasticizer at a temperature between the second order transition point of the amorphous polyester in the non-plasticized state and its apparent minimum crystallization point, subjecting the structures in the plastic state, without molecular orientation, to a plastic stretching in their longitudinal direction, and in any desired succession to a plastic deformation, without molecular orientation, in a direction deviating from the longitudinal direction of the structures and subsequently subjecting the structures in a non-plastic state to a molecular orienting drawing.

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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)
  • Artificial Filaments (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
US583380A 1955-05-13 1956-05-08 Process for preparing improved thin shaped structures, such as filaments or foils, from linear polyesters Expired - Lifetime US2917779A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF17522A DE1079788B (de) 1955-05-13 1955-05-13 Verfahren zur Herstellung von Gebilden, wie Faeden oder Folien, aus linearen Polyestern

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US2917779A true US2917779A (en) 1959-12-22

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BE (1) BE547807A (en))
CH (1) CH354202A (en))
DE (1) DE1079788B (en))
FR (1) FR1153902A (en))
GB (1) GB839845A (en))
NL (2) NL207078A (en))

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3007204A (en) * 1958-01-08 1961-11-07 Bayer Ag Process for biaxially stretching polymeric films
US3030173A (en) * 1959-09-30 1962-04-17 Hoechst Ag Process for the uniform preparation of shaped structures such as filaments or foils from high-melting linear polyesters
US3069726A (en) * 1958-03-04 1962-12-25 Du Pont Process for preparing articles having sections with metallic luster alternating with sections which are clear
US3069747A (en) * 1958-03-04 1962-12-25 Du Pont Shaped products
US3078139A (en) * 1958-10-31 1963-02-19 Union Carbide Corp Process for producing polystyrene fibers
US3090061A (en) * 1961-02-01 1963-05-21 Osborn Mfg Co Brush and brush material
US3091510A (en) * 1962-03-16 1963-05-28 Du Pont Process of preparing linear terephthalate polyester structures
US3116197A (en) * 1956-08-31 1963-12-31 Du Pont Nubbed filament and dyed fabric of same
US3127915A (en) * 1960-07-01 1964-04-07 Phillips Petroleum Co Synthetic knopped filaments
US3134122A (en) * 1961-05-31 1964-05-26 Osborn Mfg Co Self-regulating brushing tool
US3153106A (en) * 1961-10-11 1964-10-13 Glanzstoff Ag Production of novel effect fabrics and filaments and yarns therefor
US3153800A (en) * 1961-09-06 1964-10-27 Rhodiaceta Brushes
US3184822A (en) * 1962-08-15 1965-05-25 Shaw Gilbert Method for manufacture of spatulated fibre
US3186018A (en) * 1962-08-15 1965-06-01 Shaw Gilbert Brush construction
US3196602A (en) * 1962-05-11 1965-07-27 British Nylon Spinners Ltd Crimping synthetic thermoplastic yarns
US3329998A (en) * 1962-07-05 1967-07-11 Stoehr Anita Apparatus for the production of extruded articles with bristles or spikes
US3387349A (en) * 1965-04-08 1968-06-11 Bancroft & Sons Co J Differential feed roll crimper and method
US3439489A (en) * 1966-07-07 1969-04-22 Monsanto Co Novelty nub yarns
US3444682A (en) * 1965-08-10 1969-05-20 Acsa Applic Chimiche Spa Tow treatment for preparation of high-bulk yarns
US3630013A (en) * 1968-06-06 1971-12-28 Rhodiaceta Textured yarn and process for its manufacture
US3673650A (en) * 1969-05-19 1972-07-04 Bemberg Spa Method for producing a thermoplastic synthetic yarn having a latent crimp
US3958406A (en) * 1970-12-01 1976-05-25 Rhone-Poulenc-Textile Yarn having a basis of polyester with irregular titer
US4609710A (en) * 1980-09-03 1986-09-02 Teijin Limited Undrawn polyester yarn and process for manufacturing
US5164205A (en) * 1990-03-07 1992-11-17 Yoshida Kogyo K.K. Apparatus for stamping monofilament for slider fastener coupling elements
US20080111275A1 (en) * 2006-11-10 2008-05-15 Mark James Kline System And Method For Rotary Forging
US20090032991A1 (en) * 2006-02-03 2009-02-05 Anandakumar Ranganathan Process for Making Bi-Tapered Reinforcing Fibers
WO2015176997A1 (de) * 2014-05-20 2015-11-26 Itv Denkendorf Produktservice Gmbh Fäden mit variierendem fadendurchmesser sowie herstellungsverfahren für solche fäden
JP2017530222A (ja) * 2014-09-16 2017-10-12 ザ コカ・コーラ カンパニーＴｈｅ Ｃｏｃａ‐Ｃｏｌａ Ｃｏｍｐａｎｙ 水収着によりポリ（エチレンフラノエート）フィルムを可塑化する方法

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Publication number Priority date Publication date Assignee Title
US3216187A (en) * 1962-01-02 1965-11-09 Du Pont High strength polyethylene terephthalate yarn
JPS5320547B1 (en)) * 1971-07-15 1978-06-27
JPS5240667B2 (en)) * 1974-07-25 1977-10-13

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US2556295A (en) * 1947-07-23 1951-06-12 Du Pont Process of drawing formed structures of synthetic linear polyesters
US2578899A (en) * 1949-10-22 1951-12-18 Du Pont Superstretching polyester structures
GB712950A (en) * 1952-06-18 1954-08-04 Du Pont A process for melt spinning polyethylene terephthalate fibres and yarns
US2734794A (en) * 1951-07-12 1956-02-14 G cm-ton

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GB370017A (en) * 1931-01-01 1932-04-01 British Celanese Improvements in or relating to the production of artificial textile materials
GB603842A (en) * 1946-03-28 1948-06-23 Reginald John William Reynolds Improvements in the production of drawn filaments, yarns, bristles, ribbons, films and like structures from aromatic polyesters
FR1079319A (fr) * 1952-05-12 1954-11-29 Du Pont Films de téréphtalate de polyéthylène ayant des propriétés physiques améliorées

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556295A (en) * 1947-07-23 1951-06-12 Du Pont Process of drawing formed structures of synthetic linear polyesters
US2578899A (en) * 1949-10-22 1951-12-18 Du Pont Superstretching polyester structures
US2734794A (en) * 1951-07-12 1956-02-14 G cm-ton
GB712950A (en) * 1952-06-18 1954-08-04 Du Pont A process for melt spinning polyethylene terephthalate fibres and yarns

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116197A (en) * 1956-08-31 1963-12-31 Du Pont Nubbed filament and dyed fabric of same
US3007204A (en) * 1958-01-08 1961-11-07 Bayer Ag Process for biaxially stretching polymeric films
US3069726A (en) * 1958-03-04 1962-12-25 Du Pont Process for preparing articles having sections with metallic luster alternating with sections which are clear
US3069747A (en) * 1958-03-04 1962-12-25 Du Pont Shaped products
US3078139A (en) * 1958-10-31 1963-02-19 Union Carbide Corp Process for producing polystyrene fibers
US3030173A (en) * 1959-09-30 1962-04-17 Hoechst Ag Process for the uniform preparation of shaped structures such as filaments or foils from high-melting linear polyesters
US3127915A (en) * 1960-07-01 1964-04-07 Phillips Petroleum Co Synthetic knopped filaments
US3090061A (en) * 1961-02-01 1963-05-21 Osborn Mfg Co Brush and brush material
US3134122A (en) * 1961-05-31 1964-05-26 Osborn Mfg Co Self-regulating brushing tool
US3153800A (en) * 1961-09-06 1964-10-27 Rhodiaceta Brushes
US3153106A (en) * 1961-10-11 1964-10-13 Glanzstoff Ag Production of novel effect fabrics and filaments and yarns therefor
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CH354202A (de) 1961-05-15
DE1079788B (de) 1960-04-14
FR1153902A (fr) 1958-03-28
GB839845A (en) 1960-06-29
NL207078A (en))
NL108527C (en))

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