EP0690159A1 - Procédé et dispositif pour l'étirage de fils synthétiques utilisant le chauffage à vapeur - Google Patents

Procédé et dispositif pour l'étirage de fils synthétiques utilisant le chauffage à vapeur Download PDF

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Publication number
EP0690159A1
EP0690159A1 EP94117582A EP94117582A EP0690159A1 EP 0690159 A1 EP0690159 A1 EP 0690159A1 EP 94117582 A EP94117582 A EP 94117582A EP 94117582 A EP94117582 A EP 94117582A EP 0690159 A1 EP0690159 A1 EP 0690159A1
Authority
EP
European Patent Office
Prior art keywords
steam
yarn
heating means
stretching
heating
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.)
Withdrawn
Application number
EP94117582A
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German (de)
English (en)
Inventor
Vito Ballarati
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.)
Val Lesina SpA
Original Assignee
Val Lesina 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 Val Lesina SpA filed Critical Val Lesina SpA
Priority to EP94117582A priority Critical patent/EP0690159A1/fr
Publication of EP0690159A1 publication Critical patent/EP0690159A1/fr
Withdrawn legal-status Critical Current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
    • D02J1/222—Stretching in a gaseous atmosphere or in a fluid bed

Definitions

  • the present invention relates to a method for stretching more or less interlaced thermoplastic yarns, characterized in that steam and the relative equipment are used as yarn heating means.
  • Some known methods for stretching synthetic yarns encompass an aqueous liquid bath maintained at the stretch temperature.
  • the vat containing the thermostated liquid must be sufficiently large in the bath to realize a yarn path sufficiently long to allow the desired temperature to be reached.
  • the method according to the present invention is based on the use of steam in the form of a series of laminar jets having a transversal direction with respect to that of the yarn run.
  • the method and the corresponding equipment are directed to the stretch of a set of many yarns, in particular of a warp chain (or chain fraction).
  • saturated steam is used, at the pressure usually available in the factory, in the order of 295 KpA.
  • Fig. 1 represents in a purely schematic manner the whole equipment comprising rollers F and F' system for controlling inlet and outlet velocity of the yarns D, heating plates B and B', a hot water wash device L, and diathermal oil heating system E.
  • Fig. 2 represents in detail the heating plates B and B' placed in a containment chamber C provided with steam inlet (through regulation group R) and residual non utilized steam discharge A.
  • Fig. 3 represents a section of the heating plate according to a vertical plane parallel to the yarn run.
  • Fig. 4 shows the path of the diathermal oil coil.
  • the yarn fed at the heating and stretch equipment of Figure 1 is previously washed (device L) with hot water to remove the residual spinning oil, resulting detrimental to sizing operation, successive to stretching, and to prepare it to interlacing operation.
  • the yarn is passed between the heating plates B, B' without coming into contact with them.
  • the whole yarns beam (warp chain) is uniformly collided with numerous laminar jets of steam coming from the splits N of the heating plates B, B' as shown in Figure 3, wherein V indicates the steam supply chamber and G the closing plates fastened with screws H and placed next each other thus forming a small interstice in the order of 0.3 mm in order to form splits N parallel to the plates and transversal to the yarns direction.
  • the equipment also encompasses conventional device R ( Figure 2) for inlet steam pressure reduction and flow regulation.
  • the yarn is thus very quickly brought to the desired stretch temperature.
  • the heating regulation is carried out by varying the fed steam flow and the distance of the plates from the yarns beam : the distance between the lower and the upper plate, in the order of 7 cm, can be regulated.
  • the method according to the present invention has the advantage consisting in a very quick heating of the yarn and a high heating uniformity for all the yarns beam also in the case of warp chain, having a large number of yarns.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
EP94117582A 1994-11-08 1994-11-08 Procédé et dispositif pour l'étirage de fils synthétiques utilisant le chauffage à vapeur Withdrawn EP0690159A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94117582A EP0690159A1 (fr) 1994-11-08 1994-11-08 Procédé et dispositif pour l'étirage de fils synthétiques utilisant le chauffage à vapeur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94117582A EP0690159A1 (fr) 1994-11-08 1994-11-08 Procédé et dispositif pour l'étirage de fils synthétiques utilisant le chauffage à vapeur

Publications (1)

Publication Number Publication Date
EP0690159A1 true EP0690159A1 (fr) 1996-01-03

Family

ID=8216441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94117582A Withdrawn EP0690159A1 (fr) 1994-11-08 1994-11-08 Procédé et dispositif pour l'étirage de fils synthétiques utilisant le chauffage à vapeur

Country Status (1)

Country Link
EP (1) EP0690159A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392267A (en) * 1964-06-19 1968-07-09 Vickers Zimmer Ag Heating unit for fiber stretching installations
US3452132A (en) * 1966-11-03 1969-06-24 Du Pont Process of steam drawing and annealing polyester yarn
JPH05339839A (ja) * 1992-06-09 1993-12-21 Mitsubishi Rayon Co Ltd 糸条の加圧スチーム延伸処理装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392267A (en) * 1964-06-19 1968-07-09 Vickers Zimmer Ag Heating unit for fiber stretching installations
US3452132A (en) * 1966-11-03 1969-06-24 Du Pont Process of steam drawing and annealing polyester yarn
JPH05339839A (ja) * 1992-06-09 1993-12-21 Mitsubishi Rayon Co Ltd 糸条の加圧スチーム延伸処理装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 185 (C - 1185) 30 March 1994 (1994-03-30) *

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