EP0131338A1 - Procédé pour la fabrication de fils en jute ou en fibres dures similaires - Google Patents

Procédé pour la fabrication de fils en jute ou en fibres dures similaires Download PDF

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Publication number
EP0131338A1
EP0131338A1 EP84200980A EP84200980A EP0131338A1 EP 0131338 A1 EP0131338 A1 EP 0131338A1 EP 84200980 A EP84200980 A EP 84200980A EP 84200980 A EP84200980 A EP 84200980A EP 0131338 A1 EP0131338 A1 EP 0131338A1
Authority
EP
European Patent Office
Prior art keywords
yarn
slubbing
wheels
jute
fibres
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
EP84200980A
Other languages
German (de)
English (en)
Other versions
EP0131338B1 (fr
Inventor
Hong Han Njo
Roelof Carel Van Essen
Gerardus Adrianus Maria Ruis
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.)
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Original Assignee
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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 Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO filed Critical Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Priority to AT84200980T priority Critical patent/ATE24340T1/de
Publication of EP0131338A1 publication Critical patent/EP0131338A1/fr
Application granted granted Critical
Publication of EP0131338B1 publication Critical patent/EP0131338B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting

Definitions

  • the invention relates to a method of producing a yarn from a sliver or slubbing of jute fibres or similar tough staple fibres, wherein the slubbing is drawn out.
  • a method of this kind is widely known.
  • the fibres of the slubbing, which through the drawing are displaced in the longitudinal direction relative to one another, are thereby made cohesive to form a yarn by the twisting of the stretched slubbing.
  • yarns can be produced from thin, supple staple fibres, such as cotton, without twisting, by drawing out a slubbing or roving of these fibres in a saturated wet state and false twisting the drawn-out slubbing pneumatically, that is to say with the aid of an air vortex chamber; the drawn-out slubbing then has sufficient cohesion to be wound into a spool and is thereupon given, through the treatment of the spool with a sizing agent, the strength and resistance to abrasion necessary for further processing as a yarn.
  • the size for example starch, may be added to the slubbing in an inactive form, for example as starch grains, before or during the drawing, and then activated after the winding, for example by steam treatment of the spool.
  • the invention seeks to provide a method of producing, without twisting, a yarn from jute and like staple fibres which has sufficient strength and resistance to abrasion to be used in yarn processing machines, such as a loom.
  • the method according to the invention is to this end characterised in that the slubbing is wetted with an active adhesive, and after the drawing operation is false twisted and compacted with the aid of an apparatus consisting of two partially overlapping wheels turning in opposite directions and spaced a short distance apart, the drawn slubbing being passed along the common chord between the two wheels.
  • the method appears to be very reliable in operation, in contrast to earlier experience with the non-twist spinning of cotton and like fibre materials, in which the impregnation with active adhesives before or during the drawing led to serious soiling of machine parts, such as drawing rollers and false twist devices, and consequently to frequent thread breakages.
  • Figure 1 shows a slubbing 1, which comes from a store of some kind and which is passed through a tank 2 containing an adhesive known per se, which may consist of carboxymethylcellulose.
  • the slubbing 1 is passed under pins 3 and 4.
  • 5 and 6 are the inlet rollers of the drawing mechanism
  • 7 and 8 are the outlet rollers of the drawing mechanism, which turn at a higher peripheral speed than the rollers 5 and 6, the ratio between the peripheral speed of the rollers 5 and 6 to that of the rollers 7 and 8 determining the drawing ratio.
  • the apparatus Downstream of the drawing mechanism is disposed the apparatus resembling a false twisting device, consisting of the wheels 10 and 11, each of which has a diameter of 182 mm. These wheels turn in opposite directions, as indicated by the arrows 12 and 13.
  • Figure 2 shows how the strand of fibres or yarn 14 is gripped between the wheels 10 and 11.
  • These wheels may be covered with a friction coating 15 and 16 respectively. This may be a layer, of a thickness of a few millimetres, of polyurethane having a Shore hardness of 65, or else a layer of neoprene rubber. The distance between the axes of the wheels is 120 mm.
  • the wheels 10 and 11 give the yarn 14 a twist, indicated by the arrow 18, this twist extending upstream to the nip between the rollers 7 and 8 of the drawing mechanism. In the region 19 this twist is untwisted, so that the final yarn 20 is practically free from twist and, via the traversing guide 21, can be wound into a yarn package 22.
  • the slubbing 1 may be a curly slubbing of jute staple fibres with a minimum fibre length of 9 cm, a maximum fibre length of 34 cm, and a mean fibre length of 14 cm, the linear density of the slubbing amounts to 3.2 ktex.
  • the distance between the rollers 5 and 6 on the one hand and the rollers 7 and 8 of the drawing mechanism on the other hand amounts to 19 cm, the pressure between the rollers 5 and 6 is 16 kg per cm, and the pressure between the rollers 7 and 8 is 23 kg per cm, the roller 8 being covered with rubber having a Shore hardness of 65.
  • the yarns obtained were tested for abrasion resistance in a wear test apparatus.
  • this apparatus which is described by N.J. Faasen and K. van Harten in "Journal of the Textile Institute” 57, No. 7, T269, 1966, two yarns loaded by a weight are guided cross-wise one over the other and against one another in a part of the tester moving vertically up and down, the two yarns, guided over pins, rubbing over one another.
  • the number of vertical movements is a measure of abrasion resistance.
  • Table I shows that the dried yarn contains slightly more CMC when the distance between the wheels 10 and 11 is increased. This is probably due to a reduction of the rubbing action of the wheels.
  • this table shows that the abrasion resistance values rise when the yarn contains more adhesive.
  • Table II shows what happens when, while maintaining the distance of 0,75 mm between the wheels 10 and 11, the spinning speed is halved to 50 metres per minute without hanging the drawing ratio. This variation of the spinning speed has practically the same influence on the CMC content in the dried yarn as the reduction of the distance between the wheels 10 and 11.
  • the values of abrasion resistance are, however, higher.
  • Table III shows that modification of the concentration of CMC solution has little influence on the abrasion resistance of the yarn. It was however found that the yarn became too stiff.
  • Table IV shows the effect of modifying the hardness of the rubber roller 9 of the drawing mechanism.
  • flax it is known that there is a connection between the moisture content of twist-free yarn and the hardness of the rubber coated outlet roller of the drawing mechanism.
  • Table IV use was made of two hardnesses, namely 65 and 78 Shore respectively, and it is clear that the harder roller leads to a higher CMC content in the dried yarn, with correspondingly higher values of abrasion resistance.
  • Table V relates to a test for determining the effect of the speed of the wheels 10 and 11 in the false twist device again, the starting material is a curly slubbing of 3.2 ktex, drawn to a yarn of 390 tex at a speed of 50 metres per minute.
  • the CMC solution had a concentration of 3.5% and the distance between the wheels 10 and 11 was 1.0 mm.
  • the wheels 10 and 11 were first given a speed of 157 revolutions per minute, and afterwards a speed of 200 revolutions per minute.
  • the wheels 10 and 11 were in this case not coated with polyurethane but neoprene.
  • Table V shows that the values for abrasion resistance could not be further improved by raising the speed of the friction wheels.
  • the principle underlying the present invention consists essentially in selecting a special false twist apparatus which, with staple fibres which are difficult to process, surprisingly makes it possible to produce a usable yarn.
  • jute fibres it is here also possible to contemplate other tough fibres, such as hemp fibres, sisal fibres, and non-disintegrated flax, and also some plastics fibres or mixtures of natural and plastics fibres.
  • staple fibres which need an adhesive in order to be able to be processed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP84200980A 1983-07-07 1984-07-05 Procédé pour la fabrication de fils en jute ou en fibres dures similaires Expired EP0131338B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84200980T ATE24340T1 (de) 1983-07-07 1984-07-05 Verfahren zur herstellung von jutegarn oder aehnlichen bastfasern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8302432A NL8302432A (nl) 1983-07-07 1983-07-07 Werkwijze voor het vervaardigen van een garen uit jute of dergelijke stugge stapelvezels.
NL8302432 1983-07-07

Publications (2)

Publication Number Publication Date
EP0131338A1 true EP0131338A1 (fr) 1985-01-16
EP0131338B1 EP0131338B1 (fr) 1986-12-17

Family

ID=19842126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84200980A Expired EP0131338B1 (fr) 1983-07-07 1984-07-05 Procédé pour la fabrication de fils en jute ou en fibres dures similaires

Country Status (4)

Country Link
EP (1) EP0131338B1 (fr)
AT (1) ATE24340T1 (fr)
DE (1) DE3461724D1 (fr)
NL (1) NL8302432A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0741198A1 (fr) * 1995-05-05 1996-11-06 Angelo Baldi Dispositif pour l'étirage et la fausse torsion simultanés pour une unité de filature, spécifique pour une mêche de fibres cardée

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR926018A (fr) * 1945-08-24 1947-09-19 Abbott Machine Co Mécanisme d'étirage des textiles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR926018A (fr) * 1945-08-24 1947-09-19 Abbott Machine Co Mécanisme d'étirage des textiles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0741198A1 (fr) * 1995-05-05 1996-11-06 Angelo Baldi Dispositif pour l'étirage et la fausse torsion simultanés pour une unité de filature, spécifique pour une mêche de fibres cardée

Also Published As

Publication number Publication date
ATE24340T1 (de) 1987-01-15
DE3461724D1 (en) 1987-01-29
NL8302432A (nl) 1985-02-01
EP0131338B1 (fr) 1986-12-17

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