EP1518951A2 - Core yarn and method of manufacturing a core yarn - Google Patents

Abstract

The thread for heat and fire protection textile materials comprises a core (132) with a given twist direction and a minimum twist coefficient of about 80, and a cover element (134) with a twist direction corresponding to that of the core. Independent claims are also included for: (a) a method for producing the proposed thread (b) a textile material containing the proposed thread.

Description

The present invention relates to a core yarn and a method of manufacturing a core yarn.

Such a core yarn comprises a core and a sheath of a jacket roving, which spun with a twist around the soul.

The present invention is based on the object, such a core yarn to create, in which the soul through the coat as well as possible to the outside covered by the core yarn.

This object is achieved by a core yarn, the one Soul, which is a rotation with one direction of rotation and a rotation coefficient α (metric) of at least about 80, and a cladding in the Direction of rotation, which corresponds to the direction of rotation of the soul to the soul spun around.

Characterized in that in the core yarn according to the invention, the soul and the jacket Have the same direction, the best possible coverage of the Soul through the material of the mantle, so that the soul through the Material of the jacket is protected from environmental influences.

In this case, the direction of rotation of the soul, the Z-direction, that is, the direction of rotation counterclockwise, or the S direction, that is the Turn clockwise to be.

A Z-rotation soul is also called a Z-wire. A soul in S-direction is also referred to as S-wire.

So if the soul is designed as a Z-wire, then in the inventive Yarn the coat turned in the Z direction around the soul.

However, if the soul is formed as S-wire, so is the jacket of the invention Core yarns twisted in the S direction around the soul.

In a preferred embodiment of the invention it is provided that the Soul is designed as a Z-wire.

Further, it is preferably provided that the jacket in the Z direction, that is counterclockwise, turned on the soul.

Furthermore, it has to achieve a good coverage of the soul by the Cloak proved to be advantageous if the soul a rotation coefficient α (metric) of at least about 100, preferably at least about 105, has.

Furthermore, it has proved to be advantageous if the soul has a rotation coefficient α (metric) of at most about 200, preferably at most about 140, in particular of at most about 120, has.

To achieve a good covering of the core by the jacket, it is also advantageous if the core yarn has a twist coefficient α (metric) of at least about 80, preferably of at least about 100, in particular of at least about 105. The twist coefficient of the core yarn is understood to mean the twist coefficient resulting from the number of turns per unit length of the core yarn and the fineness of the core yarn in its entirety, according to the formula: α (metric) = (number of turns of core yarn per Meter) / (fineness of the core yarn in number metric (Nm)) 1.2 ,

Furthermore, it is advantageous if the core yarn has a rotation coefficient α (metric) of at most about 200, preferably at most about 140, in particular of at most about 120, has.

In a preferred embodiment of the core yarn according to the invention It is further contemplated that the material of the shell with a default of at least about 20, preferably at least about 25, spun is.

The "basic delay" designates the factor by which the material roving when spinning to the core yarn over its original one Length has been stretched.

Furthermore, it has proved to be advantageous if the material of the shell with a default of at most about 50, preferably at most about 40, spun.

The material of the soul, however, is preferably with a low Anspannverzug stretched; So it has proven to be favorable if the material the soul with a tension of at most about 1.05, preferably at most about 1.04, in particular at most about 1.03, spun.

In a preferred embodiment of the core yarn according to the invention provided that the soul contains a cellulose fiber.

Preferably, the core is substantially entirely of the cellulose fiber educated.

In particular, it can be provided that the soul contains a cotton fiber.

It has proved to be particularly favorable if the soul is a long-staple Contains cellulose fiber.

Preferably, the core contains a combed yarn or a carded yarn from a cellulose fiber.

In a preferred embodiment of the core yarn according to the invention further provided that the jacket contains an acrylic fiber.

Preferably, the jacket is formed substantially entirely of the acrylic fiber.

In particular, to give the core yarn a flame retardant effect be provided that the jacket is a flame-retardant material contains, preferably substantially completely from the flame retardant Material is formed.

Through the coat that contains the flame-retardant material is the soul, which is surrounded by the mantle, protected by the mantle from the flames and therefore may be made of a non-flame retardant material, for example be made of a cellulose fiber, without thereby affecting the Flame retardant effect of the core yarn is lost as a whole.

If the soul in this case of a non-flame retardant material is formed, in this case, the need for flame-retardant material reduced for the production of the core yarn according to the invention.

The jacket can be used as a flame-retardant material, for example a Flame-retardant acrylic fiber included.

To the soul as well as possible against environmental effects, for example, before Flames to protect, it is favorable if the material of the coat the material essentially completely covering the soul outwards.

A particularly good protection of the soul, especially in the case of a coat off A flame retardant material is obtained when the material of the Mantels account for at least about 30% by weight, preferably at least about 50% by weight, of the total Core yarn material forms.

Claim 21 is directed to a textile, which is a core yarn according to the invention includes.

The present invention is based on the further object of a method to create a core yarn in which the soul as possible well covered by the material of the jacket towards the outside of the core yarn is.

This object is achieved by a method for producing a Core yarns solved, in which a twisted in one direction soul thread with a twist coefficient α (metric) of about 80 to about 200 is used and a jacket roving in the same direction, which the soul thread is twisted around the soul thread.

Characterized in that the mantle roving in the same direction of rotation, which the soul thread turning around the soul thread becomes a special one good coverage of the material of the soul through the material of the mantle achieved.

Particular embodiments of the method according to the invention are the subject the dependent claims 23 to 41, the advantages of which are already above in connection with the particular embodiments of the invention Core yarns have been explained.

Claim 42 is directed to a textile, which is a according to the invention Process manufactured yarn includes.

Further features and advantages of the invention are the subject of the following Description and the drawing of an embodiment.

Fig. 1

eine schematische Seitenansicht einer Ringspinnmaschine zur Herstellung eines Core-Garns;

Fig. 2

eine schematische Vorderansicht eines Streckwerks der Ringspinnmaschine aus Fig. 1, mit der Blickrichtung längs des Pfeiles 2 in Fig. 1;

Fig. 3

eine schematische Draufsicht auf ein Spinndreieck, in dem die Seele und der Mantel des Core-Garns zusammengeführt werden;

Fig. 4

eine schematische perspektivische Darstellung eines Abschnitts eines mit der Ringspinnmaschine aus den Fig. 1 und 2 hergestellten Core-Garns;

Fig. 5

ein schematischer Querschnitt durch das Core-Garn aus Fig. 4;

Fig. 6

eine schematische Darstellung eines Fadens mit Z-Drehung (Z-Draht); und

Fig. 7

eine schematische Darstellung eines Fadens mit S-Drehung (S-Draht).

In the drawings show:

Fig. 1

a schematic side view of a ring spinning machine for producing a core yarn;

Fig. 2

a schematic front view of a drafting system of the ring spinning machine of Figure 1, with the viewing direction along the arrow 2 in Fig. 1.

Fig. 3

a schematic plan view of a spinning triangle, in which the soul and the sheath of the core yarn are merged;

Fig. 4

a schematic perspective view of a portion of a produced with the ring spinning machine of Figures 1 and 2 core yarn.

Fig. 5

a schematic cross section through the core yarn of Fig. 4;

Fig. 6

a schematic representation of a yarn with Z-twist (Z-wire); and

Fig. 7

a schematic representation of a thread with S-twist (S-wire).

Equal or functionally equivalent elements are the same in all figures Reference numeral.

An illustrated in FIGS. 1 and 2, designated as a whole with 100 ring spinning machine comprises a flyer bobbin 102 on which the material, which the jacket of a produced with the ring spinning machine 100 core yarn should form, is arranged as a jacket roving 103.

The jacket roving 103 drawn off from the flyer bobbin 102 passes over two Deflection pulleys 104 and 106 in a drafting system 108 of the ring spinning machine 100, which is a pair of input rollers 110, a pair of center rollers 112 and a pair of output rollers 114, wherein the sheath roving 103 each passes between the two rollers of a pair of rollers.

The material that is to form the core of the core yarn is as soul thread 116 on a cylindrical coil 118, for example a cardboard spool, arranged, with horizontal and substantially parallel to the rollers of the drafting system 108 aligned coil axis below the vertically oriented flyer coil 102 on a rod 119 in the creel of the ring spinning machine 100th is up.

The core thread 116 withdrawn from the cylindrical bobbin 118 wraps around once a delivery shaft 120 disposed below the cylindrical bobbin 118 and then via a guide roller or Pinterrolle 122 in the drafting system 108 of the ring spinning machine 100 introduced.

As best seen in FIG. 2, the pinter roll 122 is provided with a provided annular notch in which the core thread 116 runs to the core thread 116 in the axial direction of the pinter roll 122 exactly relative to to position the jacket roving 103.

The jacket roving 103 is stretched in the drafting system 108 in two stages, namely once between the input rollers 110 and the center rollers 112th and once again between the exit rollers 114 and the center rollers 112th

The thus stretched jacket roving 103 is by the rotation of the spindle 128th the ring spinning machine 100 at the output of the drafting device 108 twisted, so that there is the spin triangle 124 shown schematically in Fig. 3 forms of the lower end of the end yarn 126 down to the spindle 128 of the ring spinning machine 100 is running, which is at high speed (for example about 10,000 to about 11,000 revolutions per minute) and so on the end yarn 126 is wound on a sleeve 130 plugged onto the spindle 128.

Between the spinning triangle 124 and the spindle 128 passes through the end yarn 126 a thread guide 131th

The core thread 116 is the drafting unit 108 of the ring spinning machine 100th supplied by means of the Pinterrolle 122 so that the core thread 116 exactly centered enters the spinning triangle 124 (see Fig. 3) and so from the stretched Mantle roving 103 which is turned around the core thread 116, completely enclosed and encased.

The end yarn 126 thus formed is formed as a core yarn whose structure is shown schematically in Figs. 4 and 5.

As can be seen from Figs. 4 and 5, the end yarn 126 has a core or a soul 132 formed from the core thread 116.

This core 132 is substantially completely surrounded by a jacket 134, which is formed from the jacket roving 103 and the core thread 116 to Outside of the end yarn 126 towards substantially completely covers.

For the fullest possible coverage of the core thread 116 through the To achieve sheath 134, a twisted core thread 116 is used and the jacket roving 103 in the same direction of rotation, which is the soul thread 116th has rotated around the core thread 116 around.

As schematically illustrated in FIG. 5, for example, a core thread 116 becomes with a Z-rotation, ie a counterclockwise rotation, used. Such a Z-twisted thread, also called Z-wire is shown schematically in Fig. 6.

The sheath roving 103 is around this Z-wire as the core thread 116 also in the Z direction, that is counterclockwise, turned around.

Alternatively, it could also be provided that a core thread 116 with an S-rotation, that is with a clockwise rotation used becomes. Such a thread with S-twist, which is also called S-wire, is shown schematically in Fig. 7.

When using an S-wire as the core thread 116 then the jacket roving 103 also in the S direction, ie clockwise, turned around the core wire 116 formed as S-wire so as to a complete coverage of the core thread 116 through the jacket 134 to achieve.

As can be seen from Fig. 2, the ring spinning machine shown by way of example has 100 two parallel to each other drafting devices 108, so that simultaneously produces two Endgarnfäden 126 with this ring spinning machine 100 become. Of course, the end yarn 126 could also be with a ring spinning machine 100 are generated, which has only one drafting system 108.

Als Mantelvorgarn 103 wird ein Acrylfasergarn verwendet, das unter der Bezeichnung "Protex M" von der Firma Waxman Fibres Ltd. in Grove Mills, Elland, West Yorkshire, HX5 9DZ, Großbritannien, vertrieben wird. Dieses Vorgarn kann insbesondere als Flyerlunte mit einer Feinheit Nm 2,25 (Nummer metrisch) verwendet werden.

Als Seelenfaden 116 wird ein gekämmtes, langstapeliges Baumwollfasergarn verwendet. Dieses Garn enthält zu 100 Prozent Baumwolle. Die Feinheit dieses Garns kann insbesondere zu Nm 85 gewählt werden.

Particularly suitable for the production of a core yarn having a cellulose fiber core 132 and a flame-retardant acrylic fiber shell 134 have been found to have the following material and process parameters:

As jacket roving 103, an acrylic fiber yarn is used which is sold under the name "Protex M" by Waxman Fibers Ltd. in Grove Mills, Elland, West Yorkshire, HX5 9DZ, United Kingdom. This roving can be used in particular as Flyerlunte with a fineness Nm 2.25 (number metric).

As a core thread 116, a combed, long staple cotton fiber yarn is used. This yarn contains 100 percent cotton. The fineness of this yarn can be selected in particular to Nm 85.

The core thread 116 used is designed as a Z-wire, that is in the Z-direction turned. The rotation coefficient of the core thread 116 is, for example α (metric) = 107 (corresponding to approximately 987 turns per Meter).

The drafting system 108 of the ring spinning machine 100 is adjusted so that the Mantle roving 103 is stretched with a base draft of about 34.

Further, the drafting device 108 is adjusted so that the core thread 116 with a Pinterverzug of about 1.03 enters the drafting system 108.

The spindle of the ring spinning machine 100 rotates at about 10,500 rpm per minute.

The direction of rotation of the jacket 134 is adjusted so that the jacket 134th rotates around the core thread 116 in the Z direction.

As a final yarn 126 is then a core yarn with a soul 132 of the cotton yarn and a coat of the Protex acrylic yarn, wherein the Flame retardant acrylic fiber lies outside and the soul 132 from the cotton yarn essentially completely covered.

The fineness of the end yarn 126 is about Nm 40/1.

The weight fraction of the acrylic fiber at the end yarn 126 is about 53 Weight. The weight content of the cotton fiber on the end yarn is about 47% by weight.

The twisting coefficient of the end yarn 126 is approximately α (metric) = 119 (corresponding to 751 turns per meter).

Claims (42)

Core yarn comprising a core (132) that rotates with a Direction of rotation and a rotation coefficient α (metric) of at least about 80, and a jacket (134) in the direction of rotation, which corresponds to the direction of rotation of the soul (132) to the soul (132) spun around. Core yarn according to claim 1, characterized in that the core (132) is formed as a Z-wire. Core yarn according to one of claims 1 or 2, characterized in that the jacket (134) is turned on in the Z-direction on the core (132). Core yarn according to one of Claims 1 to 3, characterized in that the core (132) has a twist coefficient α (metric) of at least approximately 100, preferably of at least approximately 105. Core yarn according to one of Claims 1 to 4, characterized in that the core (132) has a twist coefficient α (metric) of at most approximately 200, preferably at most approximately 140, in particular at most approximately 120. Core yarn according to one of claims 1 to 5, characterized in that the core yarn (126) has a twist coefficient α (metric) of at least about 80, preferably of at least about 100, in particular of at least about 105. Core yarn according to one of claims 1 to 6, characterized in that the core yarn (126) has a twist coefficient α (metric) of at most about 200, preferably at most about 140, in particular at most about 120. Core yarn according to one of claims 1 to 7, characterized in that the material of the jacket (134) is spun with a base draft of at least about 20, preferably at least about 25. Core yarn according to one of claims 1 to 8, characterized in that the material of the jacket (134) is spun with a base draft of at most about 50, preferably at most about 40. Core yarn according to one of Claims 1 to 9, characterized in that the material of the core (132) is spun with a tensioning distortion of at most approximately 1.05, preferably at most approximately 1.04, in particular at most approximately 1.03 , Core yarn according to one of claims 1 to 10, characterized in that the core (132) contains a cellulose fiber. Core yarn according to claim 11, characterized in that the core (132) is formed substantially entirely of the cellulose fiber. Core yarn according to one of claims 1 to 12, characterized in that the core (132) contains a cotton fiber. Core yarn according to one of claims 1 to 13, characterized in that the core (132) contains a long staple cellulose fiber. Core yarn according to any one of claims 1 to 14, characterized in that the core (132) comprises a combed yarn or a carded yarn of a cellulose fiber. Core yarn according to one of claims 1 to 15, characterized in that the jacket (134) contains an acrylic fiber. Core yarn according to claim 16, characterized in that the jacket (134) is formed substantially entirely of the acrylic fiber. Core yarn according to one of claims 1 to 17, characterized in that the jacket (134) contains a flame-retardant material, preferably substantially completely formed from the flame-retardant material. Core yarn according to one of Claims 1 to 18, characterized in that the material of the jacket (134) substantially completely covers the material of the core (132) towards the outside. Core yarn according to any one of claims 1 to 19, characterized in that the material of the jacket (134) forms at least about 30% by weight, preferably at least about 50% by weight, of the total core yarn (126). A textile comprising a core yarn according to any one of claims 1 to 20. A method of producing a core yarn (126) in which an in a twisted twisted core thread (116) with a rotation coefficient α (metric) of at least about 80 is used and a jacket roving (103) in the same direction of rotation, which the soul thread (116) is spun around the core thread (116). Method according to claim 22, characterized in that a core thread (116) designed as a Z-wire is used. Method according to one of claims 22 or 23, characterized in that the jacket roving (103) is twisted in the Z direction onto the core thread (116). Method according to one of claims 22 to 24, characterized in that a core thread (116) is used, which has a rotation coefficient α (metric) of at least about 100, preferably of at least about 105. Method according to one of claims 22 to 25, characterized in that a core thread (116) is used which has a twist coefficient α (metric) of at most approximately 200, preferably at most approximately 140, in particular at most approximately 120. A method according to any one of claims 22 to 26, characterized in that the jacket roving (103) is twisted onto the core thread (116) so that the core yarn (126) has a twisting coefficient α (metric) of at least about 80, preferably at least about 100, in particular of at least about 105, having. Method according to one of Claims 22 to 27, characterized in that the jacket roving (103) is twisted onto the core thread (116) so that the core yarn has a twisting coefficient α (metric) of at most approximately 200, preferably at most approximately 140, in particular of at most about 120. A method according to any one of claims 22 to 28, characterized in that the sheath roving (103) is stretched at a basic draft of at least about 20, preferably at least about 25. A method according to any one of claims 22 to 29, characterized in that the sheath roving (103) is stretched with a base warpage of at most about 50, preferably at most about 40. Method according to one of Claims 22 to 30, characterized in that the core thread (116) is spun with a tensioning distortion of at most approximately 1.05, preferably at most approximately 1.04, in particular at most approximately 1.03. A method according to any one of claims 22 to 31, characterized in that a core thread (116) containing a cellulose fiber is used. A method according to claim 32, characterized in that a core thread (116) is used, which is formed substantially completely from the cellulose fiber. A method according to any one of claims 22 to 33, characterized in that a core thread (116) containing a cotton fiber is used. A method according to any one of claims 22 to 34, characterized in that a core thread (116) containing a long staple cellulose fiber is used. A method according to any one of claims 22 to 35, characterized in that a core thread (116) containing a combed or carded yarn of a cellulose fiber is used. Method according to one of claims 22 to 36, characterized in that a jacket roving (103) is used which contains an acrylic fiber. A method according to claim 37, characterized in that a jacket roving (103) is used, which is substantially completely formed from the acrylic fiber. A method according to any one of claims 22 to 38, characterized in that a jacket roving (103) is used which contains a flame-retardant material, preferably formed substantially entirely of the flame-retardant material. Method according to one of claims 22 to 39, characterized in that the core thread (116) is wound with the sheath roving (103) in such a way that the sheath roving (103) covers the core thread (116) to the outside substantially completely. A method according to any one of claims 22 to 40, characterized in that the resulting core yarn (126) comprises the material of the sheath roving (103) in an amount of at least about 30% by weight, preferably at least about 50% by weight, of the total material of the core. Contains yarns (126). A fabric comprising a core yarn (126) prepared according to the method according to any one of claims 22 to 41 has been prepared.

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