JP2735917B2 - Polyester / wool / conductive fiber blend yarn by air false twisting method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a blended yarn obtained by feeding a fiber bundle obtained by blending polyester fiber, wool fiber, and conductive fiber to an air false twist type spinning apparatus. is there.

(Prior art) After drafting a roving yarn with a drafting device to form a fleece, introduce it into an air false twisting type device to apply false twist, and apply false twist to the short fiber bundle located at the center. Producing a group of fibers having substantially free ends around the bundle.
The technique of winding the outer unconstrained fiber group around the central fiber bundle when untwisting the false twist to form a spun yarn is called an air false twisting spinning method, and is one of the innovative spinning methods that replace the ring spinning method. Recently, attention has recently been focused on, and many related inventions and inventions have been disclosed in many publications including Japanese Patent Publication No. 56-31370.

When the structure of the spun yarn obtained by the air false twisting spinning method is specifically described, as described in the above publication, a part of a single fiber of the staple fiber bundle has one end thereof in the inner layer portion of the yarn main body. It is locked and the other end is wrapped around the outer layer of the yarn body, and each wrapped single fiber is oriented in a certain direction with respect to the length direction of the yarn. In this case, the yarn surface is rough in one direction and has a smooth feel in the other direction. Compared to other innovative spun yarns, this yarn has relatively similar properties to yarn obtained by the conventional ring spinning method, and can be easily spun as a coated yarn or a composite yarn (Japanese 59-7912), and the center of the yarn is substantially non-twisted and rich in voids, and has the advantage of good permeability of the processing solution. Much research is ongoing.

(Problems to be solved by the invention) Practical machines for implementing the air false twisting spinning method include:
“Murata Jet Spinner” (abbreviated as MJS) by Murata Machinery Co., Ltd. is currently on the market, but it was developed mainly for cotton fibers with a relatively short fiber length.
There are still many problems to be solved in spinning yarns containing long fibers such as wool fibers.

That is, since wool fibers are composed of fibers having fiber lengths distributed over a wide range from 10 mm to 250 mm, the MJ developed for cotton fibers having a relatively uniform fiber length is relatively high.
Even if a fiber bundle containing wool fiber is directly set on S, good spinning state and yarn characteristics cannot be expected. As a convenient method, a method has been proposed in which the wool fiber is cut out and spun after resembling the fiber length distribution of the cotton fiber, but according to this, naturally, the good texture peculiar to the wool is impaired, which is not preferable. .

On the other hand, as the conductive fiber, for example, the electrical resistance containing carbon black that is continuous in the longitudinal direction is 1 × 10 ¹¹ Ω.
/ cm or less conductive layer made of thermoplastic synthetic polymer,
Three-layered composite fiber sandwiched between two layers of a non-conductive thermoplastic synthetic polymer (see Japanese Patent Publication No. 56-37322)
And a non-conductive layer composed of a fiber-forming polymer, and a conductive layer composed of a crystalline thermoplastic polymer having a melting point at least 30 ° C. lower than the polymer and titanium oxide particles having a conductive coating such as a metal oxide. (See Japanese Patent Publication No. 1-23653).

When the above conductive fiber is mixed with other white fibers, the hue of the conductive fiber is not white, the price is high, the antistatic effect is not greatly increased even when mixed, and the texture is hard. For example, about 0.1 to 3% by weight is usually mixed. In order to uniformly mix a small amount of conductive fibers with other fibers in this way, mixing in the carding process can be more uniform than mixing with a sliver, but cleaning when switching lots is very complicated. Since there are problems such as high cost and the necessity of the conductive fiber to cause NEP in the card, mixing of the conductive fiber in the card is not performed except in special cases, and the conductive fiber is usually made into a thin sliver. In the pre-spinning step, sliver mixing is performed.
However, the sliver mixing has a problem that, for example, when the mixing ratio is deviated as 99: 1, the mixing unevenness is large, and the mixing state cannot be uniform even if the number of steps is increased.

The present invention solves the above drawbacks, can be manufactured by maintaining a good spinning tone by the air false twisting spinning method, and is excellent in antistatic effect, and at the same time, has a plump texture unique to wool fiber and polyester fiber. It is an object of the present invention to provide a blended yarn of polyester fiber, wool fiber, and conductive fiber, which has a stiff texture and has a unique sense of shaking by air false twist spinning.

(Means for Solving the Problems) An object of the present invention is to provide a yarn obtained by supplying a mixed fiber bundle composed of polyester fiber, wool fiber, and conductive fiber to an air false twist type spinning apparatus and spinning the mixed fiber bundle. The fiber bundle is 27-69.9% by weight of polyester fiber, 30-70% by weight of wool fiber,
In addition to containing the conductive fiber at a ratio of 0.1 to 3% by weight, the polyester fiber has a longest fiber length of 100 mm to 200 mm, an average fiber length of 55 mm or more according to the Barbet method, and a single fiber fineness of 5 denier or less, The wool fiber has a longest fiber length of 15
0 mm to 240 mm, average fiber length by Barbe method is 55 mm or more, while the conductive fiber has a resistance of 1 × 10 ¹¹ Ω / cm or less and the longest fiber length is 51 mm to 180 mm, average fiber length by Barbe method. Is at least 51 mm and the fineness of a single fiber is 5 denier or less.

As is well known, the spun yarn obtained by the air false twist type spinning device has one end of a single fiber of a staple fiber bundle in a generated yarn inner layer portion, and the other end of the fiber comes out of the generated yarn outer layer portion to form a real twist. Wound, the arrangement of each wound single fiber has the same arrangement direction, the resulting yarn having the above structure, the yarn surface is rough in one direction in relation to the ironing direction of the yarn surface, in the other direction Has the property of being smooth.

However, in obtaining the blended yarn of the present invention, it is not possible to produce the spun yarn of the present invention simply by combining a polyester fiber having a specific fiber length, a wool fiber, and a conductive fiber at a predetermined ratio as described above. Can not. As will be described later, when using an air false twist type spinning device, a high quality yarn can be effectively produced without damaging polyester, wool and conductive fibers having a long fiber length by using a hollow roller as a draft means. Was made possible.

The polyester fiber used in the present invention is, in addition to a so-called standard type, a value-added one, for example, an anti-pill or an anti-twist, a special one having improved dyeability, or It may have a composite structure, and is selected according to the purpose and purpose.

Polyester staples suitable for blending with wool are obtained by cutting a tow consisting of a continuous long fiber bundle into a sliver shape by cutting it with a drawing device such as a tow reactor, or being cut in advance to a fixed length or a bias. Any of the methods of slivering the staples through a carding process can be adopted, but the one obtained by the drawing-out method has excellent fiber parallelism and is more suitable for the purpose of the present invention. The fiber length distribution must be such that the longest fiber length is in the range of 100 mm to 200 mm and the average fiber length by the Barbet method (the Barbea method of the method using a top analyzer specified in JIS L 1083-1971) is 55 mm or more. Thus, when a material meeting this condition is blended with a wool fiber described later, it is possible to maintain a good spinning condition.

In particular, the fineness needs to be as thin as 5 denier or less, and if the fiber is thicker than this, the number of constituent fibers of the spun yarn is too small, and the yarn strength is insufficient.

Further, the wool fiber used in the present invention is important for a worsted spinning fiber, that is, a fiber having a maximum fiber length of 150 to 240 mm and a fiber length distribution with an average fiber length of 55 mm or more according to the Barbet method. In the case of short fibers, that is, fibers for spinning and spinning, the strength and quality of the obtained yarn are remarkably inferior, and the spinning condition is unfavorably deteriorated.

The conductive fiber used in the present invention has an electric resistance of 1 ×
It is not particularly limited as long as it is 10 ¹¹ Ω / cm or less, but is usually a conductive layer made of a polymer mixed with carbon black or white metal compound particles and a fiber-forming polymer, for example, a non-conductive layer made of polyester and nylon. Is used. The staple made of the conductive fiber is obtained by a method in which a staple cut into a fixed length in advance is slivered through a carding process.
The fiber length distribution requires that the longest fiber length be in the range of 51 mm to 180 mm, and that the average fiber length by the Barbet method be 51 mm or more. Good spinning tone can be maintained when blended with fiber.

In particular, the fineness of the fiber must be as thin as 5 denier or less. If the fiber is thicker than this, the fiber is hard, the binding state in the air false twisting spinning becomes poor, and yarn spots increase.

In the present invention, when polyester fibers, wool fibers, and conductive fibers are mixed, the weight of the polyester fibers contained in the mixed fiber bundle is required to be 27 to 69.9% by weight based on the total fiber amount. If the amount of polyester fiber exceeds 69.9% by weight based on the total fiber amount, the bulkiness of wool fiber,
That is, the texture is lost, and if the content is less than 27% by weight, spinning becomes difficult due to the shortage of the number of constituent fibers in the fine count. In addition, the weight of the conductive fibers contained in the mixed fiber bundle with respect to the total fiber amount is 0.
It is required to be 1-3% by weight. If the amount of the conductive fiber exceeds 3% by weight with respect to the total fiber amount, the hand becomes hard, and if the amount is less than 0.1% by weight, the antistatic effect cannot be obtained.

Then, the sliver of the polyester fiber, the wool fiber, and the conductive fiber is set in a pre-spinning process, mixed and formed into a roving, and supplied to the air false twist spinning apparatus.

The single yarn obtained from the air false twist type spinning device is twisted by twisting a plurality of, for example, two, by a known method into a twin yarn, and the single yarn or the twin yarn is a warp or a weft for a woven fabric, or Used as yarn for knitting.

The yarn produced in this way adds the stiff texture of the blended polyester fiber and the bulkiness of wool to the sense of shaking obtained by air false twisting spinning. In addition, the garment made of a woven or knitted fabric having the antistatic effect by the conductive fiber as a raw yarn becomes a product suitable for working clothing.

The production of the yarn according to the present invention will be described based on a preferred example shown in the drawings.

As shown in FIG. 1, a roving (2) composed of a blended fiber bundle of polyester / wool / conductive fiber having the above-mentioned structure drawn from can (1) is passed through a back roller pair (3) and an apron (4). ), And sequentially passed through a draft mechanism composed of a middle roller pair (5) and a front roller pair (6) to form a fleece, and the first air injection nozzle (7) and the untwist tube ( 8) After passing through the second air injection nozzle (9) and the draw-out roller (10), the single yarn Y having the above-mentioned unique structure is formed, and is wound up as a package (11).

In order to obtain the yarn of the present invention, a hollow roller (13) having a structure as shown in FIG. 3 is attached to the top roller of the middle roller pair (5) of the draft mechanism (12) shown in FIG. It is specially adopted so that draft of polyester fiber, wool fiber and conductive fiber of a specific length can be smoothly carried out. The hollow roller (13) is manufactured with a small diameter in the central region of the outer peripheral surface, thereby forming a hollow portion (14) having an appropriate depth. The depth of the hollow portion (14) is selected according to the count of the supplied roving, and it is desirable to increase the depth for a thick roving.
In the case of 4 to 2.0 g / m, about 0.4 to 0.8 mm is appropriate.
The function of the hollow roller (13) is that when fibers longer than the roller gauge set in the draft mechanism are present in the roving yarn (this is because the fibers in the sliver prepared at the pulling-off position are not used). However, in the case of (1), it always occurs), but it is intended to control the cutting without cutting in the draft and not to disturb the draft of the other fiber group.

(Action) Since the yarn according to the present invention is directly blended into the yarn without cutting the raw wool of the fiber length distribution reaching from about 10 mm to about 250 mm at the maximum, the texture unique to wool may be impaired. Absent. In addition, since the yarn is obtained by an air false twist type spinning device instead of a ring spun yarn, the polyester fiber, wool fiber, and conductive fiber mixed in the pre-spinning process are further passed through an air stream in the spinning process. And the interlocking of the three is extremely good.

Hereinafter, specific examples of the blended yarn of the present invention will be further described.

(Example) Example 1 Wool fiber (average fiber diameter 20.5) manufactured by a usual method
μm) sliver 35 parts by weight and anti-pill polyester 3
Conductive material consisting of 63.5 parts by weight of denier, 76 mm bias cut fiber slivered by card method, 75% by weight of white metal compound particles (titanium oxide particles coated with tin oxide and doped with antimony) and 25% by weight of polyethylene White conductive composite fiber with a core component and ordinary nylon as a sheath component, 5 denier, average fiber length 89 mm
(Kanebo White Beltron 632) was slivered by a card method and 1.5 parts by weight were blended to obtain a 1.2-m (m-count, hereinafter the same) blended sliver. The sliver was passed through a MIS machine as shown in FIG. 1 to produce a spun yarn of count 48.

The depth of the groove of the hollow roller shown in FIGS. 2 and 3 was 0.6 mm in the used apparatus. The fiber length diagram of the blended sliver by the Barbet method is a longest fiber length of 180 mm, an average fiber length of 80 mm, and a total draft of 4 mm.
It was set to 0 times.

In the case where the spinning yarn 48th obtained in the present example was a twin yarn, the yarn was 46th due to the shrinkage of the twisting process, but as a 46th yarn in the case of ring-spinning the same kind of fiber, it was used for men's clothing fabric. It was practical.

Table 1 shows the yarn qualities of the 48th single yarn and the 46th double yarn obtained in this example, together with the yarn quality of the 46th double yarn obtained by ring spinning.

The strength and elongation of the single yarn in the table are based on JIS L 1095 7.5 Single yarn elongation strength and elongation (distance between gripping with a constant speed tension type testing machine)
50cm tensile speed 30cm / min), U%, Thin (-50
%), Thick (+ 50%) and Neps (+ 200%) are JIS L 1095
7.20 Yarn unevenness Measured by A method and B method.

As understood from Table 1, the blended yarn of the present invention is superior in U% and IPI to the ring spun yarn.

Example 2 Wool fiber produced by a conventional method (average fiber diameter 21.5
μm) sliver 35 parts by weight and anti-pill polyester 3
Denier, sliver of 76 mm bias cut fiber slivered by card method, 63.5 parts by weight, nylon conductive layer containing 35% by weight of conductive carbon black fine particles and normal nylon are sandwiched and joined to form a three-layer structure conductive 1.5 parts by weight of a conjugated fiber, 5 denier, and an average fiber length of 89 mm (Black Beltron 931 manufactured by Kanebo Co., Ltd.) slivered by a card method were blended to obtain a blended sliver of number 1.2. This sliver is MJS as shown in Fig. 1.
It passed through a machine to produce a spun yarn of count 48.

The depth of the groove of the hollow roller shown in FIGS. 2 and 3 was 0.6 mm in the used apparatus. The fiber length diagram of the blended sliver by the Barbet method is a longest fiber length of 180 mm, an average fiber length of 80 mm, and a total draft of 4 mm.
It was set to 0 times.

When the spinning yarn 48th obtained in the present example was a twin yarn, it became 46th due to the twist shrinkage of the twisting process, but as a 46th yarn in the case of ring-spinning the same kind of fiber, it was used for men's clothing fabric. It was practical.

Table 2 shows the yarn qualities of the 48th single yarn and the 46th double yarn obtained in this example together with the yarn quality of the 46th double yarn obtained by ring spinning.

As can be seen from Table 2, the blended yarn of the present invention is superior or almost equivalent in U% and IPI as compared with the ring spun yarn.

(Effect of the Invention) The present invention has solved the problem that fibers having a relatively long fiber length, such as wool fibers, which have drawbacks in the air false twist spinning method as described above, cannot be used as they are. This makes it possible to obtain the strength and uniformity required for a yarn. Furthermore, since the yarn is obtained by the air false twist type spinning apparatus, the polyester fiber, wool fiber, and conductive fiber mixed in the pre-spinning process are further mixed in the spinning process via an air stream, and The interaction between the people is extremely good. In addition, the constituent conductive fibers exhibit antistatic properties, and in addition to the bulky feel of wool and the rugged texture of polyester fiber, the unique sense of shaking obtained by the air false twist spinning method is added. By
It has a unique texture that has never been seen before, and is suitable as working wear.

However, according to the present invention, a remarkable effect is expected not only in promoting the practical use of the air false twisting spinning method but also in spreading it.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing an air false twist type spinning apparatus used for producing a bunched spun yarn, FIG. 2 is a perspective view showing a main part of the apparatus shown in FIG. 1, and FIG. It is a top view which shows the shape of an extraction roller. (1) ... Cans, (2) ... roving, (3) ... back roller pair, (4) ... apron, (5) ... middle roller pair, (6) ... front roller pair, ( 7)… first air injection nozzle, (8)… defibration tube, (9)… second air injection nozzle, (10)… drawer roller, (11)… package, (12)… Draft mechanism, (13) ... hollow roller, (14) ... hollow section.

Claims (1)

(57) [Claims] 1. A yarn obtained by supplying a mixed fiber bundle composed of polyester fiber, wool fiber and conductive fiber to an air false twist type spinning apparatus, and spinning the mixed fiber bundle. 30% to 70% by weight of wool fiber and 0.1% to 3% by weight of conductive fiber, and the polyester fiber has a maximum fiber length of 100 mm to 200 mm, an average fiber length of 55 mm The fineness of the fiber is 5 denier or less, and the wool fiber has a maximum fiber length of 150 mm.
~ 240 mm, the average fiber length by the Barbet method is 55 mm or more, while the conductive fiber has an electric resistance of 1 × 10 ¹¹ Ω / cm or less and the longest fiber length is 51 mm to 180 mm, the average fiber length by the Barbet method is A polyester / wool / conductive fiber blended yarn obtained by an air false twisting method, wherein the fineness of a single fiber is 5 denier or less and 51 mm or more.