US3894135A - Process for stretching a cable of polyester threads - Google Patents

Process for stretching a cable of polyester threads Download PDF

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Publication number
US3894135A
US3894135A US493557A US49355774A US3894135A US 3894135 A US3894135 A US 3894135A US 493557 A US493557 A US 493557A US 49355774 A US49355774 A US 49355774A US 3894135 A US3894135 A US 3894135A
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US
United States
Prior art keywords
cable
stretching
roller
roller mechanism
temperature
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
US493557A
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English (en)
Inventor
Karlheinz Riggert
Willy Zahn
Bernhard Jantzen
Rolf Sander
Dietmar Wandel
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.)
LL Plant Engineering AG
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ZiAG Plant Engineering GmbH
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 ZiAG Plant Engineering GmbH filed Critical ZiAG Plant Engineering GmbH
Application granted granted Critical
Publication of US3894135A publication Critical patent/US3894135A/en
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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
    • 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
    • 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
    • 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
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/73—Processes of stretching

Definitions

  • tant cables have a low percentage unstretched fibers 264/290 290 and, as a consequence, have a low percentage dyeing defects.
  • References Cited UNITED STATES PATENTS 2/1956 Calton 264/290 T 8 Claims, 1 Drawing Figure 1 PROCESS FOR STRETCHING A CABLE OF POLYESTER THREADS This is a continuation, of application Ser. No. 295,166, filed Oct. 5, 1972 now abandoned.
  • the invention relates to a process for stretching a cable of polyester threads, especially a cable of polyethylene terephthalate, between an inlet roller mechanism and a first stretching roller mechanism, in which the cable is conducted, within the inlet roller mechanism, through an immersion bath maintained at a tem perature between 40 and 65C.
  • the weight proportion deep-dyeing defects which can be determined by sorting and weighing out, is, therefore, an important, characteristic value of a polyester fiber.
  • Underyling the invention is the problem of avoiding the disadvantages of the known processes and, in particular, of achieving a uniform stretching of cables having a high spinning denier, i.e. with over 1,000,000 den., with use of high stretching speeds of up to about 200 m/min without difficulty. Finally, the expenditure in apparatus for the solution of this problem should be kept as low as possible.
  • the process accordingly, proceeds from the stretching of a cable of polyester threads between an inlet roller mechanism and a first stretching roller mechanism, in which the stretchingpoint is formed at the last roller of the inlet roller mechanism.
  • the process of this invention is characterized in that the cable, on going around the penultimate roller of the inlet roller mechanism passes through an immersion bath maintained at 40 to 65C and, the last roller of the inlet roller mechanism has a temperature that is 3 to 18C, preferably 5 to 12C, higher than the immersion bath. Further, the last roller is positioned higher than the penultimate roller and the angle between vertical and cable as it rises from the penultimate roller to the last roller is less than 55.
  • the cable is heated by the immersion bath to the desired stretching temperature only closely before the stretching point which is formed at the last roller of the inlet roller mechanism,
  • the staying or residence time of the heated cable between the immersion bath and the beginning of the stretching is short.
  • the immersion bath can contain finish-containing water. Because of the sufficiently steep upward direction of the cable as it is drawn from the immersion bath, a large part of the water carried along with the cable runs by itself, back into the immersion bath. A further position of the water is squeezed out automatically in the passage of the cable around the last roller of the inlet roller mechanism. In this manner, the drag-water contained on the stretched cable is kept small, even in the case of high entry speeds.
  • the angle between perpendicular and the cable rise between the last two rollers is chosen smaller than 30.
  • the proportion of deep-dyeing defects amounts, in the cable stretched according to the invention, to a maximum of 0.03 percent by weight.
  • the staying or residence time of the cable between the exit from the immersion bath and the commencement of the stretching at the last roller is chosen to be less than 3 sec.
  • the cable is heated in the first, stretch roller mechanism to a temperature between 30 and 85C, and preferably between 40 and 65C and is further stretched or after stretched between the first stretching roller mechanism and a subsequent second stretching roller mechanism positioned after the first mechanism.
  • the weight component of unstretched places in the cable is again reduced by a power of ten, i.e., to only 0.001 0.005 percent.
  • the tensile strength of the final,'after-stretched cable lies between 4 and 7 g/den., depending on the exact stretching ratio applied and the molecular weight of the polyester used.
  • the cable before entry into the inlet roller mechanism, is conducted through a moistening bath to swell the cable and the water carried along from this path is squeezed out so that the cable has a water content of less than 40 percent by weight before it enters the immersion bath.
  • the moistening bath is filled with finish-containing water, whose temperature lies between 25 and 40C.
  • the water carried along from the moistening bath is squeezed out of the cable to a water content of less than 25 percent by weight.
  • the squeezing out of the water from the cable is expediently accomplished with the aid of a squeeze roller which interacts with one of the first rollers of the inlet roller mechanism.
  • stretching of the cable in particular at temperatures between l 10 and 200C and preferably in a steam atmosphere.
  • a polyester thread cable is first conducted through a wetting bath 1 which contains a finish-containing water
  • the wet cable then enters the inlet roller mechanism 2, consisting of seven rollers.
  • the water content of the cable is appreciably reduced by a squeeze roller 3.
  • the next-tolast roller 5 of the inlet roller mechanism 2 is immersed in a bath 4, which is filled with tempered, finish containing water.
  • the uniformly tempered thread cable runs from the roller 5 at a very acute angle to perpendicular upward over the tempered roller 6.
  • From roller 6, the cable is drawn off with the aid of a first stretching roller mechanism 8 at a speed which is a multiple of the inlet speed of the cable.
  • first stretching field --7 In which the first cable stretching takes place.
  • the stretching in the field 7 is performed in the absence of the addition of water.
  • the stretching roller mechanism 8 is followed by a second stretching roller mechanism 11.
  • the draw-off speed of the second stretching roller mechanism 11 is greater than that of the first stretching roller mechanism 8, so that between the two mechanisms, there is formed a second stretching field 10.
  • the after-stretch achieved in field l0 contributes considerably to the improvement of the textile physical properties, especially to the lowering of the deep-dyeing defect component.
  • the cable was then conducted through an immersion bath at the sixth roller as well as over the heated seventh roller, which is heated to a temperature of 65C to achieve a uniform thorough heating to the stretching temperature.
  • the immersion bath was filled with finish-containing water and had a temperature of 58C.
  • the peripheral speed of the inlet roller mechanism was 35 m/min and the application density of the cable was 56,000 den/cm.
  • the cable was drawn off by means of the first stretching roller mechanism with a stretching ratio of 1:3.8 and the rollers of the first stretch roller mechanism had a temperature of 55C. Thereupon there followed an after-stretching in the ratio of 1:1.2 in a second stretching field, in which the cable was heated with the aid of a steam chamber having an inside temperature of C.
  • the cable obtained had a tensile strength of 4.3 g/den. and only 0.003 percent by weight components having unstretched places. In a cable taken after the first stretching field the proportion of unstretched places still amounted to 0.03 percent by weight.
  • the process according to the present invention is suited for producing polyester fibers, especially low-pill polyester staple fibers with a very low proportion of unstretched places.
  • the starting material is a low-molecular polyester material.
  • the process is not, however, restricted to this material, but extends to all forms of execution that fall under the appended claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Ropes Or Cables (AREA)
  • Artificial Filaments (AREA)
US493557A 1971-10-06 1974-08-01 Process for stretching a cable of polyester threads Expired - Lifetime US3894135A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712149793 DE2149793B2 (de) 1971-10-06 1971-10-06 Verfahren zum verstrecken eines kabels aus polyesterfaeden

Publications (1)

Publication Number Publication Date
US3894135A true US3894135A (en) 1975-07-08

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Application Number Title Priority Date Filing Date
US493557A Expired - Lifetime US3894135A (en) 1971-10-06 1974-08-01 Process for stretching a cable of polyester threads

Country Status (3)

Country Link
US (1) US3894135A (2)
DD (1) DD99621A5 (2)
DE (1) DE2149793B2 (2)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105740A (en) * 1973-12-26 1978-08-08 Toyo Boseki Kabushiki Kaisha Process for the production of polyester fiber
US4414169A (en) * 1979-02-26 1983-11-08 Fiber Industries, Inc. Production of polyester filaments of high strength possessing an unusually stable internal structure employing improved processing conditions
US4418032A (en) * 1980-11-24 1983-11-29 Hoechst Aktiengesellschaft Process for drawing tows of filaments in water
GB2165558A (en) * 1984-09-25 1986-04-16 Mettler Soehne Maschf Processing a thread or the like made of synthetic fibers
US5775084A (en) * 1995-02-14 1998-07-07 Robert K. Bernhardy Recyclable string
EP1072704A1 (en) * 1999-07-19 2001-01-31 ARTEVA TECHNOLOGIES S.à.r.l. Apparatus and method for drawing, heat setting, and crimping of filamentary material

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3602968A1 (de) * 1986-01-31 1987-08-06 Sucker & Franz Mueller Gmbh Verfahren und vorrichtung zum schlichten von filamentgarn
IT1270181B (it) * 1994-06-08 1997-04-29 Filteco Spa Procedimento ed apparecchiatura per produrre filati stirati

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734794A (en) * 1951-07-12 1956-02-14 G cm-ton
US2918346A (en) * 1956-08-07 1959-12-22 Du Pont Process of orienting a dense tow of polymeric ester filaments by two step hot aqueous bath treatments
US3077004A (en) * 1956-03-23 1963-02-12 Du Pont Filament drawing
US3259681A (en) * 1962-04-27 1966-07-05 Ici Ltd Polyester filaments
US3557273A (en) * 1964-06-25 1971-01-19 Ici Ltd Drawing synthetic thermoplastic yarn
US3567817A (en) * 1965-02-23 1971-03-02 Monsanto Co Polyester tow preheating and drawing process
US3651198A (en) * 1968-02-15 1972-03-21 Teijin Ltd Drawing and heat treatments of polyester filaments
US3739056A (en) * 1968-01-17 1973-06-12 Du Pont Draw/relax/anneal process for polyesters

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734794A (en) * 1951-07-12 1956-02-14 G cm-ton
US3077004A (en) * 1956-03-23 1963-02-12 Du Pont Filament drawing
US2918346A (en) * 1956-08-07 1959-12-22 Du Pont Process of orienting a dense tow of polymeric ester filaments by two step hot aqueous bath treatments
US3259681A (en) * 1962-04-27 1966-07-05 Ici Ltd Polyester filaments
US3557273A (en) * 1964-06-25 1971-01-19 Ici Ltd Drawing synthetic thermoplastic yarn
US3567817A (en) * 1965-02-23 1971-03-02 Monsanto Co Polyester tow preheating and drawing process
US3739056A (en) * 1968-01-17 1973-06-12 Du Pont Draw/relax/anneal process for polyesters
US3651198A (en) * 1968-02-15 1972-03-21 Teijin Ltd Drawing and heat treatments of polyester filaments

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105740A (en) * 1973-12-26 1978-08-08 Toyo Boseki Kabushiki Kaisha Process for the production of polyester fiber
US4414169A (en) * 1979-02-26 1983-11-08 Fiber Industries, Inc. Production of polyester filaments of high strength possessing an unusually stable internal structure employing improved processing conditions
US4418032A (en) * 1980-11-24 1983-11-29 Hoechst Aktiengesellschaft Process for drawing tows of filaments in water
GB2165558A (en) * 1984-09-25 1986-04-16 Mettler Soehne Maschf Processing a thread or the like made of synthetic fibers
US5775084A (en) * 1995-02-14 1998-07-07 Robert K. Bernhardy Recyclable string
EP1072704A1 (en) * 1999-07-19 2001-01-31 ARTEVA TECHNOLOGIES S.à.r.l. Apparatus and method for drawing, heat setting, and crimping of filamentary material
US6210622B1 (en) 1999-07-19 2001-04-03 Arteva North America S.A.R.L. Process of making polymeric fibers

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Publication number Publication date
DE2149793B2 (de) 1977-03-10
DE2149793A1 (de) 1973-04-19
DD99621A5 (2) 1973-08-12

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