WO1999050487A1 - Systeme de filature par friction - Google Patents

Systeme de filature par friction Download PDF

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Publication number
WO1999050487A1
WO1999050487A1 PCT/GB1999/000843 GB9900843W WO9950487A1 WO 1999050487 A1 WO1999050487 A1 WO 1999050487A1 GB 9900843 W GB9900843 W GB 9900843W WO 9950487 A1 WO9950487 A1 WO 9950487A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibres
fibre
yam
yarn
rollers
Prior art date
Application number
PCT/GB1999/000843
Other languages
English (en)
Inventor
Stephen J. Russell
Carl A. Lawrence
Original Assignee
University Of Leeds
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 University Of Leeds filed Critical University Of Leeds
Priority to AU31554/99A priority Critical patent/AU3155499A/en
Publication of WO1999050487A1 publication Critical patent/WO1999050487A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/16—Friction spinning, i.e. the running surface being provided by a pair of closely spaced friction drums, e.g. at least one suction drum

Definitions

  • the present invention relates to a friction spinning system, a method of friction spinning and includes products manufactured by the system and/or by the method, for use in the production of single or bi-component yarn structures from a variety of diverse basic polymers.
  • a plasma coated solid roller At a distance of some 0.1-0.2 mm from the perforated roller, a plasma coated solid roller.
  • the solid roller is positioned and mounted co-axially with respect to the perforated roller and on top of it so that both the solid and perforated rollers rotate in the same direction.
  • fibres exiting from the transfer channel land on the surface of the perforated roller and join the end of a forming yarn or yarn arm.
  • the yarn arm rotates/twists between the solid and perforated rollers as a result of the relative motion and frictional contact between the fibres and the roller surfaces. Rotation of the yarn arm is responsible for insertion of a twist in the yarn. In this way, a continuous yarn forming process occurs.
  • fibres land and twist simultaneously within the same area of the spinning machine/system. Accordingly, there is little control over the positioning of the fibres with respect to one another on either the roller surface or in the yam itself, consequently fibres can become buckled and/or looped within the yarn structure.
  • a serious problem associated with the prior art is that, as a result of fibres simultaneously landing and twisting on the perforated roller, yarn strength is reduced. Yarn strength is dependent on the proportion of aligned fibres.
  • fibre density can vary because of bunching and lead to non-uniform properties of a yarn such as variable absorbency.
  • the present invention provides an elegant and inventive solution to the problems associated with yam produced by friction spinning by providing a system which separates fibre deposition and yam twisting into discrete and independent operations.
  • the system of the invention in contrast to the prior art, provides for the formation of an intermediate and continuous ribbon of fibres subsequent to fibre deposition and prior to twisting of the fibre ribbon. In this way the orientation of fibres can be controlled and a quality controlled product achieved.
  • the invention comprises a friction spinning system suited to the production of a single and/or bi-component yam structure composed from any fibre type including, and without limitation, technical fibres such as alginate and other super absorbent fibres for use especially, but not exclusively, for application in medical woven and/or knitted wound dressing structures.
  • a friction spinning system for producing yam comprising: (i) means for feeding fibres on to a surface; (ii) means for forming a consolidated ribbon of said fibres on said surface; and
  • the fibre feeding means includes a transfer channel and means for directing an air flow along said channel.
  • the fibre feeding means further includes at least one fibre opening roller.
  • said ribbon forming means comprises a pair of deposition rollers which contact each other to form a positive nip.
  • one of said rollers is perforated and means are provided for applying inwardly directed suction to the perforations of the roller.
  • the rollers are arranged one above the other.
  • the fibre feeding means are such as to direct fibre on to said perforated roller in advance of said nip.
  • the yam twisting means comprises at least a pair of twisting rollers.
  • Preferably said second roller deposition is not perforated.
  • said stream of fibres is continuous.
  • the said pair of first and second deposition rollers operate in contact so as to form a positive nip.
  • the fibre deposition or landing zone is located adjacent and to the rear of a nip-line of said first and second deposition rollers.
  • said system further comprises at least a pair of second twisting rollers ideally the second twisting rollers are co-axially mounted with respect to one another.
  • twisting rollers are positioned and mounted so as to be co-axial with respect to said deposition rollers and are provided at a pre-selected distance therefrom.
  • said twisting rollers are mounted perpendicular to a roller-nip.
  • a yarn is formed as the yam twist propagates along the nip- line of the deposition rollers so that the deposition rollers nip the emerging fibre ribbon into a coherent or single bundle form.
  • Fibres produced by the system of the invention are highly orientated in the direction of yam take-off.
  • a high proportion of straight fibres, free from proportion of straight fibres, free from loop or entanglements result in the final yam thus increasing yam strength and quality.
  • the fibres are of a length in the range 5- 150mm and ideally 30-65mm.
  • the fineness of the fibre is in the region of 1-15 expressed as linear density weight gm/10,000 metres (dtex) and more ideally as 1.5-5 dtex.
  • the fibres for use in the system comprise highly absorbant material, ideally algenate and more ideally super-absorbant material selected from the group comprising: viscose, rayon, polyamide, cotton or polypropylene.
  • system of the invention is applicable to man-made or natural fibres and the nature of fibre it is not intended to limit the scope of the application.
  • a method for producing yarn comprising:
  • a friction spun yarn having a high proportion of straight fibres substantially free from loops and entanglements.
  • the friction spun yam of the third aspect of the invention and the product of the fourth aspect of the invention are for use in medical woven and/or knitted wound dressing structures.
  • the friction spun yam of the third aspect of the invention and the product of the fourth aspect of the invention comprise a single and/or bi-component yam structure product produced by the system of the first aspect of the invention and/or by the method of the second aspect of the invention.
  • Figure 1 illustrates a conventional friction spinning system
  • Figure 2 illustrates a friction spinning system according to the present invention
  • Figure 3 illustrates a diagrammatic representation of Figure 2.
  • a conventional friction spinning machine 1 comprising a feeding roller 2 rotating in direction A and feeding fibre 4 to a spiked fibre opening roller 6 rotating in opposed direction B. Fibres are separated into single strands 8 and carried in an air flow duct 10 towards rollers 12 and 14. Roller 14 is perforated on its surface and an internal suction force allows for collection of fibre strands. Roller 12 is a plasma coated solid roller which rotates in the same direction as perforated roller 14. The rollers 12 and 14 are mounted along side each other in non-abutting relationship typically being set to be 0.1-0.2 mm apart. Fibres landing between the rotating rollers 12 and 14 at area 16 join the end of yam arm 18.
  • Yarn arm 18 is rotating due to the relative motion of rollers 12 and 14 and frictional contact between the fibres and the roller surfaces, the yam arm 18 emerges in yam take off direction C. In this way a continuous yarn forming process is achieved in which fibres land and are deposited the surfaces of rollers 12 and 14 and the yam simultaneously twists.
  • the system of the present invention provides for these two processes to be conducted as discrete and independent operations.
  • FIG. 1 In the system according to the present invention, with reference to the representation of Figure 2, there is shown an air flow duct 10 feeding a continuous separated stream of fibres 8 towards rollers 24 and 22. Fibres are separated in a conventional manner by a process similar to that of Figure 1 by means of a feeder roller and spiked fibre opening roller (not shown). Roller 22 is perforated and provided with a suction force so as to collect fibres on its surface, however unlike conventional roller arrangements roller 22 is positioned so as to be in contact the surface of roller 24 along region 26.
  • the area of contact 26 of the rollers creates a positive nip, thus the fibre deposition/landing area is located behind the central axis of rollers 22 and 24 and in front of the roller nip.
  • Rollers 22 and 24 and mounted in side by side relationship with perforated roller 22 being positioned beneath roller 24.
  • rollers 22 and 24 are adapted so as to counter rotate in directions D and E.
  • FIG. 3 With reference to Figure 3 there is shown a plan view of the system of the present invention wherein the continuous stream of fibres 8 form ribbon 26. Ribbon 26 is then twisted by twisting rollers 32 and 34 which counter rotate in directions G and H thus forming yam 20 which is collected on spool 36.
  • the present invention therefore provides a system for producing yarn with aligned fibres that are highly orientated in the direction of yam take-off.
  • a high proportion of straight fibres, free from proportion of straight fibres, free from loop or entanglements result in the final yam thus increasing yam strength and quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

Système (1) de filature par friction, destiné à produire du fil, qui comporte (i) un moyen (2) destiné à amener des fibres sur une surface (24), (ii) un moyen destiné à former un ruban consolidé (26) desdites fibres sur cette surface et (iii) un moyen (32, 34) destiné à prélever le ruban de la surface sous forme d'un fil (20), ledit moyen de prélèvement étant doté d'un moyen de torsion de fil situé en aval de la surface. Lors du fonctionnement dudit système, du fil tordu se forme entre la surface et le moyen de torsion du fil.
PCT/GB1999/000843 1998-03-30 1999-03-30 Systeme de filature par friction WO1999050487A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU31554/99A AU3155499A (en) 1998-03-30 1999-03-30 Friction spinning system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9806622.8 1998-03-30
GBGB9806622.8A GB9806622D0 (en) 1998-03-30 1998-03-30 Friction spinning machine

Publications (1)

Publication Number Publication Date
WO1999050487A1 true WO1999050487A1 (fr) 1999-10-07

Family

ID=10829406

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1999/000843 WO1999050487A1 (fr) 1998-03-30 1999-03-30 Systeme de filature par friction

Country Status (3)

Country Link
AU (1) AU3155499A (fr)
GB (1) GB9806622D0 (fr)
WO (1) WO1999050487A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105200584A (zh) * 2015-10-14 2015-12-30 上海八达纺织印染服装有限公司 一种仿棉面料的有色长丝纱纺纱装置及其长丝纱加工方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3330418A1 (de) * 1983-08-23 1985-03-14 Karl-Josef Dipl.-Ing. 4156 Willich Brockmanns Friktionsspinnvorrichtung
US4860530A (en) * 1988-12-22 1989-08-29 Springs Industries, Inc. Corespun yarn friction spinning apparatus and method
DE19610960A1 (de) * 1996-03-20 1997-09-25 Fritz Stahlecker Verfahren zum Offenend-Spinnen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3330418A1 (de) * 1983-08-23 1985-03-14 Karl-Josef Dipl.-Ing. 4156 Willich Brockmanns Friktionsspinnvorrichtung
US4860530A (en) * 1988-12-22 1989-08-29 Springs Industries, Inc. Corespun yarn friction spinning apparatus and method
DE19610960A1 (de) * 1996-03-20 1997-09-25 Fritz Stahlecker Verfahren zum Offenend-Spinnen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105200584A (zh) * 2015-10-14 2015-12-30 上海八达纺织印染服装有限公司 一种仿棉面料的有色长丝纱纺纱装置及其长丝纱加工方法

Also Published As

Publication number Publication date
GB9806622D0 (en) 1998-05-27
AU3155499A (en) 1999-10-18

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