JPS63182436A - Wool/polyester blended spun yarn by air false twisting - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) The present invention relates to a blended spun yarn comprising wool fibers and polyester fibers produced by air false twist spinning.

After the rice and soil roving is drafted by a drafting device and made into a fleece, it is led to an air pre-combustion device to give a false twist. The technique of producing short fibers having substantially free ends around the fiber bundle and winding the outer unrestricted fiber group around the central fiber bundle during the untwisting of the false twist described above to form a spun yarn is based on air pre-twisting. It has recently attracted attention as one of the twist spinning methods, and many inventions and ideas related to this have been proposed in Japanese Patent Publication No. 31370/1983.

To explain specifically the structure of the spun yarn obtained by the air false twist spinning method, as shown in the above publication, one end of the single fiber of the stable fiber bundle is located in the inner layer of the produced yarn, and the other end of the fiber is located in the inner layer of the produced yarn. The fibers come out to the outer layer of the produced yarn and are wound in a real twist, and each wound single fiber is arranged in a straight arrangement direction. Such produced yarn has a yarn surface that is rough in one direction in relation to the ironing direction.
The structure is smooth in the other direction.

With this spinning method, spun yarn similar to that of the ring spinning method can be obtained at low cost, and covered yarns and composite yarns can be easily spun (
(Refer to Japanese Patent Publication No. 59-7812), and since the center of the spun yarn is essentially untwisted, it is coarse and has advantages such as good permeability to processing liquids, so it can be used for cotton, wool, etc. Attempts have been made to put this into practical use in a wide range of areas, including single spinning of natural fibers, polyester, acrylic, rayon, etc., and mixed spinning of polyester/cotton, rayon/cotton, etc.

■ tries to 　°　.

A device that performs this spinning method is the Murayama Jet Spinner (hereinafter referred to as MJS) manufactured by Murayama Machinery Co., Ltd.
There are practical machines such as "Abbreviated as "), but it is also possible to simply spin by supplying wool alone or roving containing wool and other fibers (e.g. polyester, acrylic, rayon, etc.) to these machines. Good results were not obtained, and MJS etc.
It was believed that it was not possible to obtain practical spun yarn using wool.

The reason for this is that the fiber length distribution of wool fibers is extremely uneven, ranging from a minimum of around 10 mm to a maximum of around 2,501 mm, but cotton fibers with high fiber length uniformity were developed as the main target for spinning. It is said that it is inappropriate to apply wool fiber as it is to MJS etc., and if the wool fiber is cut to less than 50+s- which is the general spinning condition for MJS etc. This is because the texture of the product is lost.

Furthermore, as mentioned above, the air-spun yarn produced by the air false twisting method has a special shape that is different from the ring yarn obtained by the ordinary ring spinning method, so the yarn strength depends on the winding of the outer layer fibers, and the When the number and type of fibers are the same, the yarn strength is naturally lower than that of ring yarn, and the spinning condition is also poor.
As a result, there was a drawback that only yarns with large counts could be obtained.

The present invention solves these drawbacks and produces wool that can be easily produced by an air false-twist spinning method, has the texture of wool, and can be used very effectively in the production of clothing fabrics. /Aim to provide polyester blend spun yarn.

In the present invention, the stable fiber bundle is supplied in an opened state from the front roller of a drafting device to a pneumatic yarn turning device and a false twisting device in which the direction of rotation is opposite. In spinning, the above object is achieved by using wool fibers of a specific fiber length and very thin polyester stable as materials for blending in a weight ratio of 20 to 80:80 to 20.

The wool fiber used in the present invention has a longest fiber length of 10 (Je
W or more, the average fiber length according to the Barbe method of the top analyzer specified in JIS L1083-1971 is over 55 - open groups, and the fineness of the polyester stable is 4.
．． 5 denier or less, average fiber length by the barbé method above is 3
0 to 12 (characterized by 1 mm).

That is, in the present invention, wool has a denier of 4.5 denier or less (particularly,
By combining very thin polyester fibers (preferably 2 deniers or less), it has become possible to produce a wool/polyester blend yarn with a practical thickness and strength.

At the same time, the present invention makes it possible to use wool with long fibers, and it is comparable to products made using the usual ring spinning method.
We have made it possible to provide blended yarn with a good texture at a low cost.

The product of the present invention not only combines wool with a long fiber length with a specific length of fine denier polyester fiber, but also by using a hollow roller in the drafting device in MJS etc., as shown in the later examples. , it becomes possible to improve quality (spinning) more effectively.

When the amount of wool in the blended yarn is less than 20% by weight,
The swelling of the wool, that is, the feel, is impaired, and conversely, if it exceeds 80% by weight, spinning becomes difficult. Furthermore, the wool fibers used in the present invention must be worsted fibers, that is, the longest fiber length is 100-1 or more, and the average fiber length is 50-1 or more, but wool fibers with short fiber lengths, that is, woolen fibers, If a square top or a square top is used, the strength and quality of the resulting yarn are markedly inferior, and the spinning condition also deteriorates, making it impossible to obtain a practical product.

The fineness of the polyester staple blended with such wool fibers may be 4.5 deniers or less, but is 4 to 1.
It is preferably 2 denier, particularly 3 to 1.2 denier, most preferably 2 to 1.2 denier.If the fineness of the polyester staple is thick (if the fineness of the polyester staple is thick, the fineness of the polyester staple is 48 or It becomes impossible to maintain the number of fibers within a range where it is possible to spin yarn of a practical thickness such as 6.0 count.

In the present invention, any of legier polyester staples, anti-pill polyester staples, super anti-bill polyester staples, or polyester composite fiber staples can be used as the polyester staples. It is better to use at least one of anti-pill polyester staples and super anti-bill polyester staples.

As a general product, polyester staples with a fineness of 1.2 to 4.5 deniers and an average fiber length of 30 to 120+- may be blended with wool fibers in the above range, but
1.2 denier, especially 3~1.2 denier, even 2~
As previously mentioned, it is preferred to use 1.27'neel and thin polyester staples.

For example, to obtain a product used for men's clothing, anti-pilling polyester (average fiber length 55 to 80 m) with a fineness of 2 denier or less and a single fiber strength of 3.0 to 4.0 g/d is used to It is best to use it at a weight ratio of ~70:70~30, and in order to obtain a product used for women's clothing, the fineness is 2 denier or less and the single fiber strength is 2.3~3.0 g/
d super anti-pill polyester staple (average fiber length 55
~80-■) and polyester composite fiber staples having a fineness of 2 to 4.5 deniers (average fiber length 30 to 120 m5) in a weight ratio of 25 to 40 to 10 to 55. As the fiber, it is preferable to use a fiber made by joining two types of polyesters having different solid viscosities in parallel or eccentrically, as used in Japanese Patent Application No. 61-89052.

If the average fiber length of polyester staple is short, it is easy to tangle (easy to use, but the texture of the wool is impaired. In order to maintain appropriate tangleability without impairing the texture of wool, the average fiber length is generally 55. It is preferable that it is -80-.

There are two methods for top making to obtain polyester fibers for blending: a card method and tow spinning, and either method can be used, but in the present invention, polyester fibers obtained by the latter tow spinning method are used. This is because when fine denier synthetic fibers used in the present invention are spun using a card method, the cleanliness of the neps, bin points, slabs, etc. is inferior, and it is necessary to prevent this from deteriorating. In order to do this, it is necessary to reduce the number of card rotations or the supply amount, but even if this could be done, there is a limit, and it is not suitable for cases where high quality yarn is required, such as wool blend products. This is for a reason.

One type of tow reactor for tow making has a higher production volume than the card type, and it makes top degree making of fibers of 2 denier or less, which are suitable for spinning by MJS, etc., while maintaining relatively good cleanliness and parallelism. Is possible.

Next, the present invention will be explained according to an example, in which MJS was used.

As shown in Fig. 2, the MJS passes the roving (2) drawn from the m-volume bobbin (1) through a pair of bank rollers (3),
After sequentially passing through a pair of middle rollers (5) with an apron (4) and a pair of front rollers (6) to form a fleece, the air is passed through the first air swirling nozzle (7) and the untwisting tube (8).
, second air swirl nozzle (9), pull-out roller (10
) to form a spun yarn Y as shown in FIG. 1, which is then wound into a package (1)).

In this embodiment, in such a spinning process, a hollow roller (13) is specially used for a pair of middle top rollers (5) of a draft device (12) as shown in FIG. This made it possible to blend wool fiber and polyester fiber.

As shown in Fig. 4, the hollow roller (13) is provided with a recess of an appropriate depth on the outer periphery of its working surface to form a hollow section (14), and the apron (4) is in contact with the outer periphery of this working surface. There is.

The depth of the hollow part (14) is determined by the thickness of the supplied roving, but for example, in the case of a sliver containing 30% or more wool and a unit weight of 0.4 to 1.3 g/m, it is 0.4 to 0. .8
-force (appropriate)

Example 1 Wool fibers produced in a conventional manner (average fiber diameter 21.
45 parts by weight of sliver (5μs+) and tow of anti-build polyester 1.5 denier were cut by draft (
55 parts by weight of the sliver with an average fiber length of 73 mm obtained by using a tow reactor (one type) was blended to obtain a blended sliver with a count of 2.4 (meter count, hereinafter the same). This sliver was passed through the MJS as described above in the form of double rovings to produce a 48 count spun yarn. Note that the groove depth of the hollow roller (13) was set to 0.6 mm. The fiber length diagram of the blended sliver determined by the barbé method had a longest fiber length of 171 m5, an average fiber length of 75.5 mm, and a total draft of 40 times.

In this example, a spun yarn with a count of 48 was obtained, but if it were made into a double yarn, it would be a useful product as a material for men's clothing, similar to the double yarn with a count of 48 obtained by ring-spinning the same type of fiber. The yarn quality of the No. 48 wheel-colored twin yarn obtained in this example is shown in the following table together with the yarn quality of the No. 48 double yarn obtained by ring spinning.

Single yarn strength (g) 190 596.0 674.
4 Single yarn elongation (%) 9 17.2 19.3
U% 13.3 9.5 9.7Th
n (-50χ) 1) 4 0 1Thi
ck(+50χ) 31 4 4Nep
s (+200χ) 38 12 15
In addition, the single yarn strength and elongation in the table above are JIS L1095,
Single yarn elongation strength and elongation rate according to 7゜5 (constant speed tension type tester, grip interval 50cm, tension speed 30cm/a+
in), U%, Th1n (-50χ), Th
1ck (+50χ) and Neps (+200χ) are J
IS L1095, 7.20 Thread unevenness It was measured by method A and B, and Th1n (-50χ) is thinner than -50χ.
00m, and Th1ck (+50χ) is 10% thicker than +50%.
Naps (+200χ) indicates the number of items thicker than +200χ per look.

Example 2 Wool fibers produced in a conventional manner (average fiber diameter 22.
35 parts by weight of a sliver of 5μ theory), 35 parts by weight of a sliver with an average fiber length of 70 mm obtained by cutting 1.5 denier tow of super anti-pill polyester by draft (tow reactor one type), 2.2 denier, 76Il - 30 parts by weight of bias-cut polyester composite fiber made into a sliver using a card method was blended into a sliver with a count of 2.2 (
A blended sliver of metric count (hereinafter the same) was obtained. M
It was passed through JS to produce a 44 count spun yarn. Note that the groove depth of the hollow roller (13) was set to 0.61)Il.

The fiber length diagram of the blended sliver determined by the barbé method had a longest line 'alt of 171 mm, an average fiber length of 75 mm, and a total draft of 40 times.

In addition, the polyester composite fiber is a polyol (number average molecular weight 1500, n-5,
Hydroxyl group equivalent: 0.298 g equivalent/100g res
in) bis(β-hydroxyethyl) terephthalate in a ratio of 30/70, and the same as component A ((g)-0.45), which is 2.4% by weight based on the polyester, and 1.5% by weight. % blended component B ((a)-0,48
) were used, which were joined in parallel at a ratio of 515.

In this example, a spun yarn with a count of 44 was obtained, but when it was made into a double yarn, it was as practical as a count 44 double yarn when ring-spun the same type of fiber for women's clothing. The yarn quality of the spun, 44th count wheel yarn, colored 44th count double yarn obtained in this example is shown in the following table together with the yarn quality of the 44th count double yarn obtained by ring spinning.

Single yarn strength (g) 163 505.2 582.
3. Thread elongation (%) 8 15.6 16.4
U% 12.8 9.5 9.4Th
in (-50χ) 94 1 0Th
ick(+50χ) 32 4 5Na
ps (+200χ) 22 4 7 In addition, single yarn strength, single yarn elongation, U%, Th1n (-50
χ), Th1ck (+50χ) and Nepa (+
200 was measured in the same manner as in Example 1.

Example 3 - Wool fibers produced in a conventional manner (average fiber diameter 2
2. , 5 μ■), 35 parts by weight of a sliver with an average fiber length of 70 - obtained by cutting 1.5 denier polyester tow by draft (tow reactor one type), and 35 parts by weight of a sliver of 2.5 denier polyester. 7 Sliver 3 obtained by placing low bias cut cotton on a card
0 parts by weight were blended to obtain a blended sliver with a count of 2.4 (meter count, hereinafter the same). This sliver was passed through the MJS as described above in the form of double rovings to produce a 48 count spun yarn. In addition, the hollow roller (13)
The groove depth was set to 0.6-.

The fiber length diagram of the blended sliver determined by the barbé method is that the longest fiber length is 181 mm, and the average fiber length is 76 mm.
The roller gauge of the draft device is the front roller (6)
and the cradle roller (13) is 82-1, and the distance between the cradle roller (13) and the back roller (3) is 1) 2 mm.
, and the total draft was multiplied by 40.

The yarn quality of the 48 count spun yarn obtained in Example 3 was changed to 48 count spun yarn obtained in the same manner as in Example 3 except that 1.5 denier polyester staples were slivered by the card method.
The following table shows a comparison with the thread quality of Comparative Example).

"Niji ILLu Takumi Single yarn strength (g) 160 150 Single yarn elongation (%) 109 U % 13.5 13.7Thi
n (-50χ) 100 1)0Th
ick(+50χ) 27 35N
eps (+200χ) 35 5
5 In addition, single yarn strength, single yarn elongation, U%, Th1n (
-50ri, Th1ck (+501) and Nepa (+
200 m) was measured in the same manner as in Example 1.

From this result, compared to the product using the card method sliver (comparative example), the product using the tow method sliver (Example 3) can obtain a high quality product with homogeneous thread quality. I understand.

1) Standing 1) The wool/polyester blend spun yarn of the present invention can be produced very easily and at low cost using the air false-twisting method, which was previously thought to be unable to use worsted fibers as they are. Since it is contained in the form of long fibers, it has a good texture and can be put to practical use in a wide range of applications, similar to blended yarns obtained by conventional ring spinning methods.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the spun yarn of the present invention, FIG. 2 is an explanatory view showing an example of the apparatus used for manufacturing the present invention, and FIG.
This figure is a perspective view showing the main parts of the apparatus shown in FIG. 2, and FIG. 4 is a plan view of the hollow roller used in the apparatus shown in FIG. (1) W1 bobbin (10) Pull-out roller is) Roving (1)) Package (3) Pair of back rollers (12) Draft device (4) Apron (13) Hollowing roller (5) Pair of middle rollers (14)
Hollow part (6) Pair of front rollers (7) First air swirl nozzle (8) Untwisting tube (9) Second air swirl nozzle

Claims (5)

[Claims] (1) Blended spun yarn obtained by supplying staple fiber bundles in an opened state from the front roller of a drafting device to a pneumatic yarn turning device and a false twisting device in which the direction of rotation is opposite, which is a material for blended spinning. Wool fibers and polyester staples are used in a weight ratio of 20 to 80:80 to 20, and the longest fiber length of the wool fibers is 100.
mm or more, the average fiber length by the barbé method of the top analyzer specified in JISL1083-1971 is 55 mm or more, and the fineness of the polyester staple is 4.
．． 5 denier or less, average fiber length by the barbé method above is 3
A blended spun yarn produced by air false twisting, characterized in that it has a thickness of 0 to 120 mm. (2) The blended spun yarn according to claim 1, wherein a tow-spun staple is used as the polyester staple. (3) The blended spun yarn according to claim 1 or 2, wherein a regular polyester staple having an average fiber length of 55 to 80 mm and a fineness of 2 denier or less by the barbé method is used as the polyester staple. (4) The blended spun yarn according to claim 1 or 2, wherein an anti-pill polyester staple having an average fiber length of 55 to 80 mm and a fineness of 2 denier or less by the barbé method is used as the polyester staple. . (5) As polyester staples, super anti-pill polyester staples have an average fiber length of 55 to 80 mm and a fineness of 2 deniers or less as determined by the Barbe method, and super anti-pill polyester staples have an average fiber length of 30 to 120 mm and a fineness of 2 deniers as determined by the Barbe method. The blended spun yarn according to claim 1 or 2, wherein polyester composite fiber staples having a denier of ~4.5 are used in a weight ratio of 25 to 40 to 10 to 55.