JP2610489B2 - Blended yarn of acrylic fiber and natural fiber by air false twisting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a mixed yarn made of acrylic fiber and natural fiber by an air false twist method.

(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 fiber bundle in the center when untwisting the false twist to form a spun yarn is called an air false twist spinning method, and is one of the innovative spinning methods that replace the ring spinning method. Recently, it has attracted attention recently and has been disclosed in many documents including Japanese Patent Publication No. 56-31370.

In the spun yarn obtained by this air false twisting spinning method, as described in the above-mentioned publication, a part of the single fiber of the stable fiber bundle has one end locked to the inner layer portion of the yarn main body, and the other end. Is wound around the outer layer of the yarn body, and each wound single fiber is oriented in a fixed direction with respect to the length direction of the yarn. It has relatively similar properties to the yarn obtained by the ring spinning method, is easy to be spun as a coated yarn or a composite yarn (see Japanese Patent Publication No. 59-7912), and has almost no central portion of the yarn. Since there are advantages such as twisting, which is rich in voids, and good permeability of the processing solution, many studies have been made to apply the method to spinning of various fibers.

(Problems to be Solved by the Invention) However, as a practical machine for performing the air false twisting spinning method represented by the above-mentioned Japanese Patent Publication No. 56-31370, "Murata Jet Spinner" by Murata Machinery Co., Ltd. is currently used. "
(Abbreviation MJS) is commercially available, but it is developed mainly for short fibers of 100 mm or less as described in the above-mentioned publication, and is therefore extremely effective for cotton fibers and the like. However, there are still many problems to be solved in spinning yarns containing fibers having a long fiber length such as wool.

For example, wool fibers are composed of fibers having fiber lengths distributed over a wide range from 10 mm to 250 mm.Therefore, wool fibers are used as they are in MJS developed for cotton fibers with short fiber lengths and relatively high uniformity. A good spinning state and yarn characteristics cannot be expected even if set. As a convenient method, a method has been proposed in which wool fibers are cut and made to resemble the fiber length distribution of cotton fibers, followed by spinning. Absent.

This is the same when the acrylic fiber has a fiber length of 100 mm or more, and also when the fiber length is relatively longer than cotton fibers such as hemp and silk.

On the other hand, as schematically shown in FIG. 1, the yarn obtained by the air false twisting spinning has a different structure from the yarn obtained by the ring spinning, and does not substantially have actual combustion. Since the inner layer fibers are bundled by the outer layer fiber wound around the inner layer fiber bundle to express the yarn strength, when the number of constituent fibers in the cross section of the yarn is the same, compared to the ring spun yarn, Naturally, the yarn strength is low.

The present invention addresses the above-mentioned situation, and can be manufactured while maintaining a good spinning condition by the air false twisting spinning method, and also maintains the soft and smooth feeling peculiar to acrylic fiber, and natural fiber It is an object of the present invention to provide a blended yarn of an acrylic fiber and a natural fiber having a unique appearance by air false twist spinning in consideration of the feeling of the above.

(Hands for solving the problem) That is, the feature of the blended yarn of the present invention that meets the above-mentioned object is that the blended yarn composed of natural fiber and acrylic fiber containing acrylic fiber at a ratio of 20 to 95% based on the total amount A yarn obtained by supplying a fiber bundle to an air false twist type spinning device including two air injection nozzles for generating swirling air flows having opposite rotation directions in each nozzle, and spinning the acrylic fiber; 5 denier or less, maximum fiber length is 100-200 mm, average fiber length is 55 mm or more, while natural fiber has a maximum fiber length of 150
240240 mm, wool or hemp have an average fiber length of 50 mm or more, silk has an average fiber length of 40 mm or more, and the number of fibers in the cross section of the blended yarn is at least 50 or more.

Here, in obtaining the blended yarn of the present invention, combining an acrylic fiber and a natural fiber having a fiber length of the above-described characteristics at a predetermined ratio is used when setting the air false twist type spinning apparatus as described later. By using the hollow roller as the drafting means, it is possible to effectively produce high-quality yarn without damaging acrylic and natural fibers having a long fiber length.

It is important that the natural fiber and the acrylic fiber to be mixed have a relatively long fiber length as described above. Preferred types of the natural fiber are wool, hemp,
Each fiber of silk is mentioned, and at least one kind of fiber selected from these fibers is used.

In this case, it is preferable that the mixing ratio of wool fiber is 5 to 80%, and that of hemp fiber and silk fiber is 5 to 50%.

Of course, two or more kinds of fibers may be used. In this case, the content ratio is appropriately determined within the required range of the natural fiber.

Next, each embodiment in the blend spinning for each of these natural fibers will be described.First, wool fibers have a fiber length distribution in which the worsted spinning fiber, that is, the maximum fiber length is 150 to 240 mm, and the average fiber length by the Barbet method is 50 mm or more. It is important that the fiber is shorter than that, that is, a fiber for spinning and the like, in which the strength and quality of the obtained yarn are remarkably inferior, and the spinning condition is unfavorably deteriorated.

The wool fiber may be formed into a sliver through a known normal process, or may be formed into a sliver through a known normal process and pneumatically threaded from a front roller of a draft device in an open state. Before the spinning device and the false twist applying device are supplied to two air jet nozzles whose rotation directions are opposite to each other and are spun, that is, after the sliver is formed, the shrink-prevention process is performed by a chlorinated resin method or the like before the spinning. Alternatively, the scale of the surface fibers may be removed except for a part of the specific ratio.

As a concrete means of this shrink-proofing processing, Japanese Patent Publication No. 62-38469
In addition to the publication, there is a method proposed by the applicant in Japanese Patent Application No. 62-24974 earlier, for example, by spraying an aqueous solution containing active chlorine on a sliver of wool fiber, etc., and filling it with water. The chlorinated resin method, in which wool fiber sliver is introduced into a U-shaped tube and the fiber surface is immersed deeply in a nearly vertical state and the scale is removed by chlorinating only the fiber surface by capillary action and hydrostatic pressure, is extremely difficult. It is valid.

In this case, the scale on the surface of the wool fiber is completely removed and the surface of the fiber itself becomes extremely smooth, so that it becomes rich in gloss, but it does not reach the deep gloss like silk. Is preferably left at a specific ratio.

The hemp fiber is most commonly ramie, which has a fiber length distribution almost similar to the acrylic fiber to be mixed, is formed into a continuous sliver by a known method, and both are parallel to the pre-spinning process. It is set up and blended,
It is formed into a roving and supplied to the air false twist type spinning device.

Furthermore, silk fibers used as natural fibers have a maximum fiber length of 15
A sliver of 0 to 240 mm, average fiber length of 40 mm or more, manufactured by the perfusion cotton method for silk spinning, mixed with acrylic fiber, etc. in the pre-spinning process, mixed and fed as a roving to the air false twist type spinning device Is done.

The single yarn of the spun yarn obtained by feeding and spinning to the air false twist type spinning device in this manner, the number of fibers constituting the yarn cross section is preferably 50 or more, 12 to 80
It has a thickness of a metric number, and thereafter, a plurality of the medium-twisted yarns are twisted together by a known method, and then a plurality of the medium-twisted yarns are further twisted, or directly twisted into a plurality of yarns to obtain a desired twist. It is made into worsted and hand-knitted yarns. In this case, the number of ply twists is preferably about 2 to 20, and the total count is preferably about 1 to 40 meters.

Worsted yarn and hand-knitted yarn produced as described above are
The silky feel of the blended natural fiber and the smoothness based on the rough surface of the yarn obtained by air false twisting spinning, while at the same time having the original bulky appearance of acrylic fiber The garment made with this is a suitable product with a rich seasonal feeling.

Next, the production of the blended yarn according to the present invention will be described based on an example of an apparatus shown in the drawings.

That is, as shown in FIG. 2, in the production of the blended yarn of the present invention, the roving yarn 2 composed of the mixed fiber bundle having the above-described structure drawn from the can 1 was provided with a back roller pair 3 and an apron 4. The fleece-like material sequentially passed through a draft mechanism consisting of a middle roller pair 5 and a front roller pair 6 is used as a first air injection nozzle 7, a defibration tube 8, a second air injection nozzle 9, This is implemented by forming a single yarn Y having the above-described structure through a pull-out roller 10 and winding it up as a package 11.

In this case, in order to obtain the yarn of the present invention, since the acrylic fibers and natural fibers used include fibers having a predetermined long fiber length, the top roller of the middle roller pair 5 of the draft mechanism 12 shown in FIG. On the other hand, a hollow roller 13 having a structure as shown in FIG. 4 is specially adopted so that draft of each fiber of a specific length can be smoothly carried out.

The hollow roller 13 is formed with a small diameter in the central region of the outer peripheral surface, thereby forming a hollow portion 14 having an appropriate depth. When used, the apron 4 is this hollow part
It comes in contact with 14 and rotates. 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, for example, when the weight of the roving is 0.4 to 2.0 g / m. Is suitably about 0.4 to 0.8 mm. The function of the hollow roller 13 is that the fiber longer than the roller gauge set in the draft mechanism exists in the roving yarn (this is inevitable when wool fiber or the like is targeted). However, it is intended to control the cutting without cutting during drafting and not to disturb the draft of other fiber groups.

(Action) The bundled blended yarn composed of acrylic fiber and natural fiber produced as described above has a feeling of natural fiber together with a plump texture unique to acrylic, and the number of fibers constituting the fiber is 50 or more. The strength and elongation are not inferior to those of the conventional ring spinning machine, so when this is used as a hand-knitted yarn, it takes into account the bulky property, the smooth feeling and the texture of each natural fiber A suitable product can be manufactured.

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

(Example 1) 40% by weight of a sliver having an average fiber diameter of 22μ of wool fiber manufactured through a normal process, and acrylic, 2 denier 76mm bias cut cotton are slivered by a card method into a sliver by a card method, and the sliver is obtained by a weight ratio. 60% of the two were blended to obtain a roving of 1.1 count (the same applies to metric counts and below).

This was passed through an MJS machine having the structure shown in FIG. 2 to produce a spun yarn having a count of 56 (60 fibers).

 The quality of the obtained spun yarn is shown in Table 1 below.

The single yarn strength and elongation in the above table are based on JIS L 1095 7.5
Single yarn elongation strength and elongation percentage (50 cm between grips at constant speed tension tester, 30 cm / min tensile speed), U%, Thin (−50
%), Thick (+ 50%) and Neps (+ 200%) are JIS L 1095
7.20 Yarn unevenness Measured by A method and B method.

The roller gauge of the draft device of the MJS machine is set to 103 mm between the front roller and the cradle roller, 107 mm between the cradle roller and the back roller, the total draft is 50.9 times, and the groove depth of the hollow roller is 0.
6 mm.

The average fiber length of the blended sliver was 77.6 mm and the maximum fiber length was 190 mm.

(Example 2) 15% by weight of hemp fiber (ramie) sliver manufactured by a usual method and sliver of acrylic 2 denier 76 mm bias cut cotton by a card method were used as a sliver of 85% by weight.
% Of the two were blended to obtain a 1.1th roving. This was passed through the MJS machine in the same way as in Example 1 to 56th (60 fibers)
Was produced.

 The yarn quality of the obtained spun yarn is shown in Table 2 below.

The measurement for each item in the table is performed in the same manner as in Example 1 described above.

(Example 3) A silk sliver manufactured by a cotton wool method using silk cotton for silk spinning was 10% by weight and acrylic 2 denier 76
mm bias cut cotton was made into a sliver by a card system, and the two were mixed and spun at a weight ratio of 90% to obtain a roving yarn of 1.2 count.
This is also passed through the MJS machine to 60th ((Fiber composition number 58
Of the present invention.

 The yarn quality of the obtained blended yarn is shown in Table 3 below.

The measurement for each item in the table is the same as in Example 1.

Each of the blended yarns according to the present invention from the above examples has a sufficient yarn quality required as a spun yarn such as a strong yarn, and can be applied to various fields similarly to a spun yarn made from a ring spinning machine. I understand.

(Effect of the Invention) The present invention utilizes fibers having a relatively long fiber length exceeding 100 mm, which has been a concern in the air false twisting spinning method, as described below, and the average fiber length and the maximum fiber length are 55 mm or more,
Acrylic fiber with a range of 0 to 200 mm and natural fiber such as wool, hemp, silk, etc. are blended and spun by blending more than 50 fiber components, ensuring the necessary strength as a spun yarn, and In addition to imparting the bulkiness of acrylic fiber and the feel of natural fiber while maintaining uniformity, it has the unique appearance of yarn by the air false twist spinning method, and its application fields including worsted yarn and hand-knitted yarn It has a remarkable effect on the practical application of the air false twisting spinning method and its spread.

In addition, the blended yarn of the present invention has a plump bulky property in wool and a further silky luster when part of the surface scale is removed, and in the case of hemp, it is a hemp-and-drink type depending on the type of natural fiber to be blended. It has the effect of increasing the refreshing feeling by giving a crisp space, and also giving a wonderful luster in silk, adapting the blended yarn in a wide range to the respective fields of use, and further promoting practical use.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the shape and structure of a single yarn used in the present invention, and FIG. 2 is a side view schematically showing an air false twist type spinning device used to produce the yarn shown in FIG. FIG. 3 is a perspective view showing a main part of the apparatus shown in FIG. 2, and FIG. 4 is a plan view showing the shape of a hollow roller. (1)… Cans, (2)… roving, (3)… back roller pair, (4)… apron, (5)… middle roller pair, (6)… front roller pair, ( 7) 1st air swirl nozzle, (8) ... fibrillation tube, (9) ... 2nd air swirl nozzle, (10) ... draw-out roller, (11) ... package, (12) ... Draft mechanism, (13) ... hollow roller, (14) ... hollow section.

Claims (6)

(57) [Claims] 1. A mixed fiber bundle comprising natural fibers and acrylic fibers containing acrylic fibers in a proportion of 20 to 95% with respect to the total amount of the mixed fiber bundles in each nozzle to form two swirling air flows having mutually opposite rotation directions. A yarn that is supplied and spun to an air false twist type spinning device comprising an air injection nozzle, wherein the acrylic fiber has a fineness of 5 denier or less, and has a maximum fiber length of 100 to 200 mm,
The average fiber length according to the Barbet method (the same applies hereinafter) is 55 mm or more, while the natural fiber has a maximum fiber length of 150 to 240 mm, the average fiber length is 40 mm or more, and the number of fibers constituting the blended yarn cross section is at least 50. A blend yarn of acrylic fiber and natural fiber by the air false twisting method, wherein the number is at least one. 2. The natural fiber is selected from wool fibers or hemp fibers having a maximum fiber length of 150 to 240 mm and an average fiber length of 50 mm or more, or silk fibers having a maximum fiber length of 150 to 240 mm and an average fiber length of 40 mm or more. A blend yarn of acrylic fiber and natural fiber by the air false twisting method according to claim 1, which is one kind. 3. A mixed fiber bundle comprising a wool fiber and an acrylic fiber containing 20 to 95% of an acrylic fiber with respect to the total amount, and two swirling air flows having rotating directions opposite to each other are formed in respective nozzles. A yarn obtained by spinning supplied to an air false twist type spinning device comprising an air injection nozzle, wherein the acrylic fiber has a fineness of 5 denier or less, a maximum fiber length of 100 to 200 mm, and an average fiber length of 55 mm or more, 3. The acrylic by the air false twisting method according to claim 1 or 2, wherein the wool fiber has a maximum fiber length of 150 to 240 mm, an average fiber length of 50 mm or more, and has at least 50 or more fibers in a cross section of the blended yarn. Blended yarn of fiber and natural fiber. 4. The mixed spun yarn of acrylic fiber and natural fiber by the air false twisting method according to claim 2, wherein at least a part of the wool fiber has a scale on the fiber surface removed to leave a specific ratio. 5. A mixed fiber bundle comprising hemp fiber and acrylic fiber containing 20 to 95% of acrylic fiber with respect to the total amount, and two swirling air flows having rotating directions opposite to each other are formed in respective nozzles. A yarn which is supplied and spun to an air false twist type spinning device comprising an air injection nozzle, wherein the acrylic fiber has a fineness of 5 denier or less, a maximum fiber length of 100 to 200 mm, an average fiber length of 55 mm or more, The air false twist according to claim 1 or 2, wherein the hemp fiber has a maximum fiber length of 150 to 240 mm, an average fiber length of 50 mm or more, and has at least 50 or more fibers in a cross section of the spun blended yarn. Blended yarn of acrylic fiber and natural fiber by the method. 6. A mixed fiber bundle composed of a silk fiber and an acrylic fiber containing 5 to 50% of a silk fiber with respect to the total amount to form a swirling air flow in the respective nozzles, the rotation directions of which are opposite to each other.
A yarn supplied and spun to an air false twist type spinning device comprising air injection nozzles, wherein the acrylic fiber has a fineness of 5 denier or less, a maximum fiber length of 100 to 200 mm, and an average fiber length of 55 mm or more. While silk fibers have a maximum fiber length of 15
The blended yarn of acrylic fiber and natural fiber by the air false twisting method according to claim 1 or 2, wherein the fiber length is 0 to 240 mm, the average fiber length is 40 mm or more, and the number of fibers in the blended yarn cross section is at least 50 or more. .