EP0165625A2 - Process for stretching synthetic filaments - Google Patents

Process for stretching synthetic filaments Download PDF

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Publication number
EP0165625A2
EP0165625A2 EP85200720A EP85200720A EP0165625A2 EP 0165625 A2 EP0165625 A2 EP 0165625A2 EP 85200720 A EP85200720 A EP 85200720A EP 85200720 A EP85200720 A EP 85200720A EP 0165625 A2 EP0165625 A2 EP 0165625A2
Authority
EP
European Patent Office
Prior art keywords
filaments
stretching
train
liquid
bath
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.)
Granted
Application number
EP85200720A
Other languages
German (de)
French (fr)
Other versions
EP0165625A3 (en
EP0165625B1 (en
Inventor
Eugenio Calvete Capdevila
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT85200720T priority Critical patent/ATE46549T1/en
Publication of EP0165625A2 publication Critical patent/EP0165625A2/en
Publication of EP0165625A3 publication Critical patent/EP0165625A3/en
Application granted granted Critical
Publication of EP0165625B1 publication Critical patent/EP0165625B1/en
Expired legal-status Critical Current

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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

Abstract

1. Improved process for the stretching of synthetic filaments, especially filaments on a base of polypropylene or the like, composed of two steps, each of which corresponds to a partial stretching, the first step taking place under wet conditions by means of a filament feed mill (1) and a stretching mill (2), a liquid bath (3) and submerged guide rolls (4) being provided between these two elements (1, 2), the second stretching step using the stretching mill (2) of the first step, which now functions as a feed mill for the filaments laden with liquid as a result of their passage through the said bath (3), the said filaments being conveyed towards heated means of the second stretching step (6), characterized in that the said heated means are brought to a temperature higher than the fusion temperature of the filaments in the dry state.

Description

La présente invention concerne des perfectionnements apportés aux procédés d'étirage mixte de filaments synthétiques.The present invention relates to improvements made to the processes of mixed drawing of synthetic filaments.

Plus concrètement, les perfectionnements ont trait à des améliorations apportées aux procédés d'étirage de filaments synthétiques et, de préférence aux filaments en polypropylène ou similaires, améliorations qui consistent à apporter la chaleur nécessaire à l'étirage, par contact et sans pression, en utilisant pour ce faire un procédé mixte dans lequel interviennent deux étirages partiels, le premier par chauffage dans un bain liquide et le second par chauffage à sec.More concretely, the improvements relate to improvements made to the processes for drawing synthetic filaments and, preferably to polypropylene filaments or the like, improvements which consist in providing the heat necessary for drawing, by contact and without pressure, by to do this, using a mixed process in which two partial draws take place, the first by heating in a liquid bath and the second by dry heating.

Les procédés d'étirage à chaud des filaments synthétiques sont déjà connus ; ces procédés présentent toute fois toujours l'inconvénient suivant : il est nécessaire de limiter la température, lors du traitement des matériaux qui fondent à basse température et ceci tout spécialement dans le cas du propylène et similaires. Ces basses températures de traitement conduisent à un étirage médiocre des filaments avec tous les problèmes qui en découlent.The methods of hot drawing of synthetic filaments are already known; However, these methods always have the following disadvantage: it is necessary to limit the temperature when treating materials which melt at low temperature, and this is especially the case in the case of propylene and the like. These low processing temperatures lead to poor drawing of the filaments with all the problems that arise therefrom.

L'invention s'est donné pour but de pallier ces inconvénients et, dans ce but, elle met en jeu comme indiqué deux étirages partiels dont le premier s'effectue au mouillé, en utilisant des moyens connus, tandis que dans le second interviennent des plaques chauffées qui fournissent des températures considérablement supérieures à celles obtenues selon les procédés traditionnels, ces températures pouvant être supportées par les filaments sans détérioration de ces derniers grâce à l'ap-. port du liquide introduit dans lesdits filaments lors de la phase antérieure d'étirage au mouillé. La température élevée des plaques chauffées, à leur contact avec les filaments chargés de liquide, produit donc une vaporisation instantanée de celui-ci en permettant ainsi un étirage maximal des filaments, une orientation maximale de leurs molécules et une stabilité maximale.The object of the invention is to overcome these drawbacks and, to this end, it involves, as indicated, two partial draws, the first of which is carried out in the wet, using known means, while in the second, heated plates which provide temperatures considerably higher than those obtained by traditional methods, these temperatures being able to be supported by the filaments without deterioration of the latter thanks to ap-. wearing of the liquid introduced into said filaments during the previous wet stretching phase. The high temperature of the heated plates, in contact with the filaments loaded with liquid, therefore produces an instantaneous vaporization of the latter, thus allowing a maximum filament rage, maximum orientation of their molecules and maximum stability.

La présente invention sera mieux comprise à l'aide de la description qui suit d'un mode de réalisation de l'invention, décrit à titre d'exemple, en référence au dessin schématique annexé dans lequel :

  • - la Fig.l est une vue latérale schématique de l'installation prévue pour le procédé d'étirage mixte selon l'invention,
  • - la Fig.2 représente une vue en plan de l'installation représentée en figure 1.
The present invention will be better understood with the aid of the following description of an embodiment of the invention, described by way of example, with reference to the appended schematic drawing in which:
  • - Fig.l is a schematic side view of the installation provided for the mixed drawing process according to the invention,
  • - Fig.2 shows a plan view of the installation shown in Figure 1.

Les figures représentent un train d'alimentation constitué de moyens traditionnels qui dans le cas du présent exemple, se composent des rouleaux rotatifs 1 qui, en combinaison avec le train d'étirage 2, le bain 3 porté à température adéquate et les rouleaux submergés 4 constituent le premier étirage partiel des filaments 5.The figures represent a feed train made up of traditional means which in the case of the present example consist of rotary rollers 1 which, in combination with the drawing train 2, the bath 3 brought to an adequate temperature and the submerged rollers 4 constitute the first partial stretching of the filaments 5.

Les filaments 5 sont ensuite conduits en continu au second moyen d'étirage du procédé en utilisant, pour ce faire, le train d'étirage 2 qui fonctionne alors en qualité de train d'alimentation et qui amène les filaments 5, chargés en liquide par leur passage dans le bain 3, vers les plaques 6 chauffées à une température élevée, d'environ 160"C, où le liquide se vaporise en permettant aux filaments de supporter cette température sans fondre ; l'étirage se produit, dans ces circonstances et on effectue-la stabilisation des filaments en coopération avec le train d'étirage 7.The filaments 5 are then routed continuously to the second drawing means of the process using, to do this, the drawing train 2 which then operates as a feed train and which brings the filaments 5, loaded with liquid by their passage in the bath 3, towards the plates 6 heated to a high temperature, of about 160 "C, where the liquid vaporizes allowing the filaments to withstand this temperature without melting; stretching occurs, in these circumstances and the filaments are stabilized in cooperation with the drawing train 7.

Le procédé décrit permet d'obtenir des filaments de ténacité élevée et de stabilité maximale ; la relation existant entre les vitesses des étirages partiels, permet d'obtenir l'élasticité désirée pour les filaments.The process described makes it possible to obtain filaments of high tenacity and maximum stability; the relation existing between the speeds of the partial stretchings, makes it possible to obtain the desired elasticity for the filaments.

Comme il va de soi et comme il ressort de ce qui précède, l'invention ne se limite pas au seul mode de réalisation décrit ci-dessus à titre d'exemple ; elle en embrasse, au contraire, toutes les variantes, quels que soient notamment les milieux liquides et les moyens matériels utilisés.As is obvious and as is clear from the above, the invention is not limited to the single embodiment described above by way of example; she in embraces, on the contrary, all variants, whatever the liquid media and the material means used in particular.

Claims (1)

Procédé perfectionné pour l'étirage de filaments synthétiques, plus spécialement de filaments à base de polypropylène ou similaires du type à étirage mixte composé de deux opérations en ligne interrompue l'une par rapport à l'autre, chacune desquelles correspondant à une phase d'étirage partiel dont la première s'effectue au mouillé à l'aide d'un train d'alimentation des filaments et d'un train d'étirage (2), un bain de liquide (3) et des rouleaux de guidage submergés (4), étant prévu entre ces deux éléments, caractérisé en ce que la seconde phase d'étirage utilise le train d'étirage (2) de la première phase, qui fonctionne alors comme train d'alimentation des filaments, chargés de notables quantités de liquide du fait de leur passage dans ledit bain (3), en ce que lesdits filaments sont conduits vers des moyens chauffées (6) portés à une température supérieure à la température de fusion des filaments à l'état sec, et en ce que, sur lesdits moyens (6) se produit la vaporisation instantanée de la charge liquide et la stabilisation desdits filaments en coopération avec un train final d'étirage et de stabilisation (7).Improved process for drawing synthetic filaments, more particularly polypropylene-based filaments or the like of the mixed-stretch type, consisting of two operations in line interrupted with respect to each other, each of which corresponds to a phase of partial drawing, the first of which is carried out in the wet using a filament feed train and a drawing train (2), a liquid bath (3) and submerged guide rollers (4 ), being provided between these two elements, characterized in that the second stretching phase uses the stretching train (2) of the first phase, which then functions as a feed train for the filaments, loaded with significant quantities of liquid due to their passage through said bath (3), in that said filaments are led to heated means (6) brought to a temperature higher than the melting temperature of the filaments in the dry state, and in that, on said means (6) occurs instant vaporization year of the liquid load and the stabilization of said filaments in cooperation with a final stretching and stabilization train (7).
EP85200720A 1984-06-15 1985-05-09 Process for stretching synthetic filaments Expired EP0165625B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85200720T ATE46549T1 (en) 1984-06-15 1985-05-09 STRETCHING PROCESS FOR SYNTHETIC FILAMENTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES533461 1984-06-15
ES533461A ES533461A0 (en) 1984-06-15 1984-06-15 IMPROVEMENTS IN SYNTHETIC FILAMENT STRETCHING SYSTEMS

Publications (3)

Publication Number Publication Date
EP0165625A2 true EP0165625A2 (en) 1985-12-27
EP0165625A3 EP0165625A3 (en) 1987-05-06
EP0165625B1 EP0165625B1 (en) 1989-09-20

Family

ID=8487495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85200720A Expired EP0165625B1 (en) 1984-06-15 1985-05-09 Process for stretching synthetic filaments

Country Status (7)

Country Link
EP (1) EP0165625B1 (en)
AT (1) ATE46549T1 (en)
BE (1) BE902624A (en)
DE (1) DE3573143D1 (en)
ES (1) ES533461A0 (en)
FR (1) FR2566007B1 (en)
IT (1) IT1176453B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0691424A3 (en) * 1994-06-08 1996-04-17 Filteco Spa Method and apparatus for producing stretched yarns
EP0731196A1 (en) * 1995-02-23 1996-09-11 B a r m a g AG Method for the spinning, drawing and winding up of a synthetic yarn
US5698146A (en) * 1995-07-18 1997-12-16 Barmag Ag Method and apparatus for spinning a synthetic multi-filament yarn

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1363999A (en) * 1962-04-30 1964-06-19 Shell Int Research Advanced process for the production of polyolefin fibers
US3816486A (en) * 1969-11-26 1974-06-11 Du Pont Two stage drawn and relaxed staple fiber

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1363999A (en) * 1962-04-30 1964-06-19 Shell Int Research Advanced process for the production of polyolefin fibers
US3816486A (en) * 1969-11-26 1974-06-11 Du Pont Two stage drawn and relaxed staple fiber

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0691424A3 (en) * 1994-06-08 1996-04-17 Filteco Spa Method and apparatus for producing stretched yarns
EP0731196A1 (en) * 1995-02-23 1996-09-11 B a r m a g AG Method for the spinning, drawing and winding up of a synthetic yarn
US5698146A (en) * 1995-07-18 1997-12-16 Barmag Ag Method and apparatus for spinning a synthetic multi-filament yarn

Also Published As

Publication number Publication date
FR2566007A1 (en) 1985-12-20
ES8504982A1 (en) 1985-05-01
BE902624A (en) 1985-09-30
ES533461A0 (en) 1985-05-01
IT8422004A0 (en) 1984-07-23
EP0165625A3 (en) 1987-05-06
IT1176453B (en) 1987-08-18
FR2566007B1 (en) 1988-01-15
EP0165625B1 (en) 1989-09-20
ATE46549T1 (en) 1989-10-15
DE3573143D1 (en) 1989-10-26

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