JP2001279552A - Stretchable false twisted slub composite yarn, method and apparatus for producing the same and woven and knitted fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stretchable false twisted slub composite yarn capable of imparting unconventional stretchability while exhibiting a new appearance and improving a touch feeling with slub parts, to provide a method and an apparatus for producing the composite yarn and to obtain a woven and a knitted fabrics. SOLUTION: This stretchable false twisted slub composite yarn comprises a core yarn 11 constituting the composite yarn and formed of a first core yarn 11a composed of a filament yarn and a second core yarn 11b composed of a monofilament yarn made of a polyurethane. During the false twist texturing, the second core yarn 11b in a stretched state is twisted with the first core yarn 11a to thereby form the core yarn 11. Nonslub parts 13 are composed of single parts in which a floating yarn 12 composed of filament yarns are singly wrapped around the core yarn 11 in a state of the stretched second core yarn 11b. Slub parts 14 are formed of triple parts in which the floating yarn 12 is trebly wrapped around the core yarn 11 in a state of the stretched second core yarn 11b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel stretchable false-twisted slab composite yarn having a novel stretchability, which can impart an unprecedented stretchability to, for example, a woven or knitted fabric, and a method and apparatus for producing the same. And woven and knitted fabrics.

[0002]

2. Description of the Related Art Conventionally, false twisted slab composite yarns have been produced by false twisting a core yarn and a floating yarn made of a filament yarn, and have been composed of a triple portion in which the floating yarn is wound around the core yarn three times. It has a slab part and a non-slab part composed of a single part in which the floating yarn is wound around the core yarn by a single twist in a direction opposite to the triple part. The woven or knitted fabric manufactured using the false twisted slab composite yarn exhibits a novel appearance with the slab portion emphasized, has a rough feel, and brings out the texture of natural fibers such as wool.
Furthermore, as such a false twisted slab composite yarn, an undrawn core yarn and a drawn floating yarn are used, and the undrawn core yarn is contracted by being immersed in boiling water and subjected to a boiling water treatment. In addition, there has been proposed a yarn having a stretchability of about 5 to 10% over the entire yarn.

[0003]

However, according to the above-described false twisted slab composite yarn, it is difficult to say that stretchability of about 5 to 10% is good in elongation. There is a problem that it is not suitable for use as.

[0004] The present invention has been made by paying attention to such problems existing in the prior art. The object is to provide a stretch false twisted slab composite yarn capable of imparting unprecedented elasticity while exhibiting a novel appearance and improving texture by the slab portion, a method and apparatus for producing the same, and a fabric. And knitting.

[0005]

According to a first aspect of the present invention, there is provided a stretch false twist slab composite yarn having a stretchability and a first core yarn comprising a filament yarn. The floating yarn made of a filament yarn is wound around a core yarn formed by twisting with a second core yarn made of a drawn filament yarn, and false-twisted to form a slab portion and a non-slab portion. The slab portion is constituted by a triple portion in which the floating yarn is wound around the core yarn in a state where the second core yarn is extended, and the non-slab portion is constituted by a core in a state where the second core yarn is extended. The floating yarn is configured to have a single part in which the floating yarn is wound around the yarn in a single layer, and the single part of the core yarn expands and contracts to have a stretch property.

According to a second aspect of the present invention, there is provided a stretch false twist slab composite yarn according to the first aspect, wherein the second core yarn is formed of a monofilament yarn made of polyurethane.

According to a third aspect of the present invention, there is provided a method for producing a stretch false twist slab composite yarn, in which a second core yarn made of a filament yarn having stretch properties is drawn with respect to a first core yarn made of a filament yarn. While supplying and twisting in a state, the floating yarn is supplied to these core yarns, the core yarn and the floating yarn are twisted, and the twist of the twisted core yarn and the floating yarn is heated and held. In addition, after the obtained core yarn and floating yarn are untwisted to obtain a false twisted composite yarn, the false twisted composite yarn is heated and held.

According to a fourth aspect of the present invention, there is provided an apparatus for producing a stretch false twist slab composite yarn, comprising: a first core yarn supply section for supplying a first core yarn made of a filament yarn; and a filament yarn having stretchability. A second core yarn supply unit for supplying a second core yarn comprising the second core yarn and joining the first core yarn to the first core yarn;
Is disposed downstream of the core yarn supply section of the
A stretching mechanism for merging the core yarns in a stretched state, and a floating yarn supply section for supplying a floating yarn composed of a filament yarn and merging the first and second core yarns And twisting the first core yarn and the second core yarn supplied from the first core yarn supply unit and the second core yarn supply unit to form a core yarn, and the core yarn and the floating yarn A false twisting section for twisting and untwisting the floating yarn supplied from the supply section, and disposed upstream of the false twisting section to heat and hold the twist of the twisted core yarn and floating yarn. And a second heater disposed downstream of the false twisting section for heating and holding the untwisted core yarn and floating yarn.

[0009] The invention of the woven fabric according to claim 5 is the invention according to claim 1.
Alternatively, it is obtained by weaving using the stretch false twist slab composite yarn according to claim 2. According to a sixth aspect of the present invention, there is provided a knitted fabric obtained by knitting using the stretch false twisted slab composite yarn according to the first or second aspect.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1A is a diagram schematically illustrating a winding form at the time of false twisting of the stretch false twisted slab composite yarn of the present embodiment. The core yarn 11 constituting the stretch false twist slab composite yarn is formed by a first core yarn 11a made of a filament yarn and a second core yarn 11b made of a monofilament yarn made of polyurethane. At the time of this false twisting, the second core yarn 1
1b is stretched more than the first core yarn 11a, and is twisted with the first core yarn 11a in the stretched state to form the core yarn 11.

The non-slab portion 13 is composed of a single portion in which a floating yarn 12 composed of a filament yarn is wound around the core yarn 11 in a state where the second core yarn 11b is extended. The slab portion 14 is formed of a triple portion in which the floating yarn 12 is wound around the core yarn 11 in a state where the second core yarn 11b is extended. A large number of the non-slab portions 13 and the slab portions 14 are formed alternately in the running direction of the yarn. For this reason, the non-slab portion 13 is present adjacent to the slab portion 14 so that a clear difference appears between the two, and the slab portion 14 is conspicuous and emphasized, and the slab portion 14 exhibits a novel appearance. The texture like natural fiber is exuded.

FIG. 1 (b) is a diagram schematically showing a winding state of a stretch false twist slab composite yarn in a natural state without tension after false twist processing, and FIG. 2 is a stretch false twist slab composite in that state. It is the figure which expanded one place with a thread. The twist direction of the stretch false twist slab composite yarn is Z-twist in the single part constituting the non-slab part 13. In the triple part constituting the slab portion 14, twist is applied in a direction opposite to that of the single part, resulting in SZS twist.

The second core yarn 11b in the expanded state
Is returned to the original state after false twisting, so the non-slab part 1
In No. 3, the interval between the turns of the floating yarn 12 is greatly reduced,
The first core yarn 11 a protrudes from between the floating yarns 12 to form a large number of slacks 15. Further, in the slab portion 14, the interval between the turns of the floating yarn 12 is slightly narrowed,
The first core yarn 11a is slightly loosened between the floating yarns 12. In addition,
In FIG. 2, each slack 15 is drawn so as to protrude up and down for easy understanding, but on the actual stretch false twist slab composite yarn, the slack 15 protrudes 360 ° around the yarn.

When the entire yarn is elongated due to tension or the like, first the second core yarn 11b is elongated and the slack 1
As a result of the elongation of 5, the entire core yarn 11 is elongated, and the interval between the turns of the floating yarn 12 in the non-slab portion 13 is increased. At the same time, the core yarn 11
Slightly elongate. When the tension or the like is lost and the entire yarn contracts, first, the second core yarn 11b forming the core yarn 11 contracts, and the first core yarn 11a and the floating yarn 12 follow the original contraction. Return to the state.

Accordingly, the second core yarn 1 forming the core yarn 11
1b, the core yarn 11 in the non-slab portion 13
Since the yarn itself expands and contracts greatly, a stretch property that has not existed conventionally is imparted to the entire yarn. In addition, when the entire yarn expands and contracts, since the winding of the floating yarn 12 is strong in the slab portion 14, the expansion and contraction of the core yarn 11 is limited by a small amount, and the core yarn 11 which may be generated in the non-slab portion 13 is formed. And float 1
2 are prevented from shifting from each other.

Next, an apparatus for producing a stretch false twist slab composite yarn will be described. As shown in FIG. 3, a core yarn feed roller 2 constituting a stretching mechanism is provided on the upstream side of the manufacturing apparatus.
2 are provided. A supply roller 21b that constitutes a first core yarn supply section is disposed on a side of the core yarn feed roller 22, and a first roller drawn from the supply roller 21b.
The core yarn 11a is drawn out to the twisting area 20a by the core yarn feed roller 22. A drawing roller 21 and a stock cheese 21a that constitute a second core yarn supply section are provided upstream of the core yarn feed roller 22, and the second rotation from the rotation of the drawing roller 21 causes the second rotation from the stock cheese 21a. Of the core yarn 11b.

The second derived from the stock cheese 21a
After being joined to the first core yarn 11a before the core yarn feed roller 22, the core yarn 11b reaches the core yarn feed roller 22 and is drawn out to the twisting section 20a. The rotation speed of the core yarn feed roller 22 is set to be higher than the rotation speed of the drawing roller 21, so that the second core yarn 11 b is drawn between the core yarn feed roller 22 and the drawing roller 21. It has become.

A first heater 23, a spinner 24 and a first delivery roller 25 constituting a false twisting section are arranged in this order from the upstream side downstream of the core yarn feed roller 22. The first core yarn 11a and the second core yarn 11b thus obtained pass through the spinner 24 and are sent to the first delivery roller 25. Then, the first core yarn 11a and the second core yarn 11b immediately after being drawn out to the twisting section 20a are instantly gripped between the first delivery roller 25 and the core yarn feed roller 22, and in this state, the spinner 24 Is twisted by the rotation of the core yarn 11.
Is formed.

The core yarn feed roller 22 and the first heater 23
A floating yarn feed roller 26 is disposed at a lateral position between the floating yarn feed rollers 26. When the floating yarn feed roller 26 passes between the floating yarn feed rollers 26, the floating yarn Is also overfeed. A yarn supply guide 27 is provided on the advancing side of the floating yarn 12 with respect to the floating yarn feed roller 26. The floating yarn 12 guided in the advancing direction by the yarn supply guide 27 is connected to the core yarn feed roller 22 and the first yarn feeder 22. Yarn is supplied between the heaters 23 from the side.
Then, the core yarn 11 and the floating yarn 12 are joined between the core yarn feed roller 22 and the first delivery roller 25,
Twisting is performed in the twisting section 20 a by rotation of the spinner 24, and the twist is heated and held when passing through the first heater 23.

The core yarn 11 and the floating yarn 12 that have passed through the spinner 24 are untwisted in the untwisting section 20b and sent to a second delivery roller 28 provided downstream of the first delivery roller 25. A second heater 29 is provided between the first delivery roller 25 and the second delivery roller 28, and the core yarn 11 and the floating yarn 12 untwisted by the second heater 29 are held by twist heating and stretch false twisting. Slab composite yarns are to be manufactured. A drum 30 and a cheese 31 are provided beside the second delivery roller 28, and the stretch false twist slab composite yarn drawn out by the second delivery roller 28 is wound around the cheese 31.

Next, a method for producing a stretch false twist slab composite yarn will be described. Now, as shown in FIG. 3, the first core yarn 11a derived from the supply roller 21b is supplied to the twisting section 20a via the core yarn feed roller 22. The second core yarn 11b drawn out of the stock cheese 21a by the drawing roller 21 is joined to the first core yarn 11a while being drawn, and supplied to the twisting area 20a via the core yarn feed roller 22. The yarn is twisted and twisted with the first core yarn 11a to form the core yarn 11. Thereafter, the floating yarn 12 in the overfeed state is joined to the core yarn 11 formed in the twisting section 20a and twisted, and the twist of the core yarn 11 and the floating yarn 12 is heated and held by the first heater 23. You.

The core yarn 11 and the floating yarn 12 which have passed through the first heater 23 and the false twisting spinner 24 are untwisted in the untwisting section 20b, and then pass through the first delivery roller 25 to the second heater 2.
The untwisted twist is drawn into 9 and heated and held to form a stretch false twist slab composite yarn. Thereafter, the formed stretch false twisted slab composite yarn is moved by the drum 30 via the second delivery roller 28 and the cheese 3
It is wound by one.

The triple portion forming the slab portion 14 is an active part of the floating yarn 12 in the twisting area 20a due to the overfeed amount of the floating yarn 12 with respect to the core yarn 11 and the propagation of the twist of the yarn due to the rotation of the spinner 24. Due to the deflection, the floating yarn 12 is wound around the core yarn 11 three times and formed. Further, the single part constituting the non-slab part 13 is a twisted area 20.
a) the twist of the core yarn 11 and the floating yarn 12
It is formed by untwisting at 0b.

Next, false twisting was performed using the apparatus shown in FIG. 3 under the following conditions. First core yarn 11a: polyester, 150 denier / 4
8 filaments Second core yarn 11b: polyurethane, 40 denier / 1 filament Floating yarn 12: polyester, 50 denier / 24 filament Number of rotations of false twist spinner 24: 200,000 rpm False twist number: 2500 T / M Core yarn feed roller 22 Feed rate of the first delivery roller 25: + 7.5% Feed rate of the second delivery roller 28: + 7.5% Temperature of the first heater 23: 210 ° C. Temperature of the second heater 29: 200 ° C. Elongation ratio of second core yarn 11b to first core yarn 11a:
3.0 times Overfeed of the floating yarn 12 with respect to the core yarn 11: 1.
5 times A stretch false twisted slab composite yarn having a non-slab portion 13 and a slab portion 14 was obtained under the above processing conditions.

A woven fabric is obtained by weaving the stretch false twisted slab composite yarn manufactured as described above using at least one of a warp and a weft, and flat knitting the stretch false twisted slab composite yarn with a knitting machine. A knitted fabric can be obtained by weaving by weft knitting, circular knitting, or the like. The woven and knitted fabrics using the stretch false twist slab composite yarn exhibit a novel appearance in which the slab portion 14 is emphasized,
The texture is improved, and the core yarn 11 itself expands to have an unprecedented elasticity.

The present embodiment can be embodied with the following modifications. -The second core yarn 11b may be a filament yarn formed using synthetic rubber or natural rubber.

The second core yarn 11b may be joined in a state where the first core yarn 11a is slightly stretched. In the case of such a configuration, since the entire yarn expands and contracts more, the expansion ratio can be improved.

The first core yarn 11a and the floating yarn 12 may be an acetate-based, rayon-based, nylon-based, or polyester-cation-based filament yarn. Or the first
The core yarn 11a and the floating yarn 12 may be filament yarns made of different materials.

A first core yarn 11a and a second core yarn 11b
For the floating yarn 12, original yarns colored in different colors from each other may be used. With this configuration, it is possible to obtain a stretch false twisted slab composite yarn having different colors throughout the yarn.

The stretching ratio of the second core yarn 11b is not limited to three times, but is in the range of 1.5 to 4 times, that is, the elongation ratio of the second core yarn 11b is 150 to 400%. It may be changed as desired. This stretching ratio is set to 1.
If it is less than 5 times, the stretch false twist slab composite yarn does not expand and contract sufficiently, and if it is more than 4 times, the second core yarn 11b may be cut during false twisting.
Therefore, if the stretching ratio is set in the range of 1.5 to 4 times, the elasticity can be effectively provided.

The stretching mechanism is not limited to the stretching roller 21, and the second core yarn 11b may be configured to be stretched by sliding a pin or the like in a direction perpendicular to the drawing direction. In this case, the second
Can be drawn.

The twist direction of the stretch false twist slab composite yarn is S in the single part constituting the non-slab part 13.
The slab portion 14 may be twisted, and the triple portion constituting the slab portion 14 may be twisted ZZZ.

Further, a technical idea which can be grasped from the above embodiment will be described below. The claim 1 or claim, wherein the non-slab portion is S-twisted or Z-twisted, and the slab portion to which twisting is applied in a direction opposite to the non-slab portion is Z-S-Z twisted or S-Z-S twisted. 3. The stretch false twist slab composite yarn according to 2. In such a configuration, the slab portion can effectively maintain a novel appearance and an improved texture.

The second core yarn is set to 1.
The stretch false twisted slab composite yarn producing apparatus according to claim 4, wherein the stretch false twisted slab composite yarn is stretched 5 to 4 times. With such a configuration, the elasticity can be effectively provided.

[0035]

As described above in detail, according to the present invention, the following effects can be obtained. According to the stretch false-twisted slab composite yarn of the invention according to claim 1, while maintaining a novel appearance and improved texture by the slab portion,
Unprecedented elasticity can be imparted.

According to the stretch false twisted slab composite yarn of the second aspect, in addition to the effects of the first aspect, higher stretchability can be imparted. According to the method for producing a stretch false twisted slab composite yarn of the invention according to claim 3, a stretch false twist imparting unprecedented elasticity while maintaining a novel appearance and improved texture by the slab portion. A slab composite yarn can be manufactured.

According to the stretch false twisted slab composite yarn manufacturing apparatus of the fourth aspect of the present invention, an unprecedented elasticity is imparted while maintaining a novel appearance and an improved texture by the slab portion. A stretch false twist slab composite yarn can be easily manufactured.

According to the woven fabric of the fifth aspect of the present invention, it is possible to exhibit unprecedented elasticity while maintaining the novel appearance and the improved texture by the slab portion. According to the knitted fabric of the invention described in claim 6, it is possible to exhibit unprecedented elasticity while maintaining the novel appearance and the improved texture by the slab portion.

[Brief description of the drawings]

FIG. 1A is a schematic diagram illustrating a form in which a floating yarn is wound around a core yarn during false twisting, and FIG. 1B is a schematic diagram illustrating a state in which the floating yarn is wound around a core yarn after false twisting.

FIG. 2 is an enlarged schematic view of a part of a stretch false twist slab composite yarn.

FIG. 3 is a conceptual diagram showing an apparatus for producing a stretch false twist slab composite yarn.

[Explanation of symbols]

11: core yarn, 11a: first core yarn, 11b: second core yarn, 12: floating yarn, 13: non-slab portion, 14: slab portion, 21: stretching forming a second core yarn supply portion roller,
21a: a stock cheese constituting the second core yarn supplying section;
21b: a supply roller constituting the first core yarn supply section, 22
... A core yarn feed roller constituting a stretching mechanism, 23 ... First
Heater, 24 ... Spinner constituting false twisting part, 29
... Second heater.

Claims (6)

[Claims] 1. A first core yarn comprising a filament yarn,
The slab portion is formed by winding a floating yarn made of a filament yarn on a core yarn formed by twisting with a second core yarn made of a stretched filament yarn and twisted by false twisting. A non-slab portion, wherein the slab portion is constituted by a triple portion in which the floating yarn is wound around the core yarn in a state where the second core yarn is extended, and the non-slab portion is formed by the second core yarn. It is composed of a single part where the floating yarn is wrapped around the core yarn in the extended state,
Stretch false twist slab composite yarn configured to have stretch properties by the expansion and contraction of a single part core yarn. 2. The stretch false twist slab composite yarn according to claim 1, wherein the second core yarn is formed of a monofilament yarn made of polyurethane. 3. A second core made of a filament yarn having a stretch property with respect to a first core yarn made of a filament yarn.
In the stretched state of the core yarn, the yarn is supplied and twisted, the floating yarn is supplied to these core yarns, the core yarn and the floating yarn are twisted, and the twisted core yarn and the floating yarn are twisted. A method for producing a stretch false twisted slab composite yarn, which comprises heating and holding a twist of the resulting twisted yarn, heating and holding the false twisted composite yarn after untwisting the obtained core yarn and floating yarn. 4. A first core yarn supplying section for supplying a first core yarn composed of a filament yarn, and a second core yarn composed of a filament yarn having a stretch property and supplying the first core yarn. A second core yarn supply unit for joining the yarn with the yarn, and a second core yarn supply unit disposed downstream of the second core yarn supply unit;
A drawing mechanism for joining the second core yarn in a stretched state; and a floating yarn for supplying a floating yarn composed of a filament yarn and joining the first and second core yarns. A supply unit, and a first core yarn and a second core yarn supplied from the first core yarn supply unit and the second core yarn supply unit are twisted to form a core yarn; A false twist processing section that twists and untwists the floating yarn supplied from the floating yarn supply section, and is arranged upstream of the false twist processing section to heat and hold the twist of the twisted core yarn and floating yarn. Stretch false twisted slab composite yarn, comprising: a first heater for performing twisting, and a second heater disposed downstream of the false twisting portion and for heating and holding the untwisted core yarn and floating yarn. Manufacturing equipment. 5. A woven fabric obtained by weaving using the stretch false twisted slab composite yarn according to claim 1 or 2. 6. A knitted fabric obtained by knitting using the stretch false twisted slab composite yarn according to claim 1.