JP3413574B2 - Specially designed yarn and its manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a specially designed yarn which is soft and has a soft texture and a large number of fine loops are densely present on the yarn surface, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as yarns for clothes using acrylic staples, acrylic staples having a hot water shrinkage of 2d or more and 10 to 25% and acrylic staples having a hot water shrinkage of 2d or more and 0 to 3% are used. Blended yarn is used.
However, this yarn takes a form called a so-called semi-wing after being bulked and is not preferred by consumers, and a higher quality yarn is required.

[0003]

Therefore, the inventor of the present invention
As a result of diligent development in order to obtain a beautifully designed yarn with a beautiful yarn that does not have a yarn form called a semi-wing, a mixed spun yarn of high shrinkage acrylic staple fiber and low shrinkage acrylic staple fiber having a hot water shrinkage ratio of 30% or more. In this case, the thickness of each of them is set to a fine denier, and further, a predetermined number of single yarns of a fine count obtained are twisted a predetermined number of times and subjected to boiling water treatment, whereby it is possible to eliminate such a conventional defect. I found it.

[0004]

The present invention adopts the following means in order to solve such problems. That is, the present invention is
Acrylic staple fibers A having a hot water shrinkage of 30% or more and a thickness of 0.8 to 2d, and finer than the staple fibers A, a hot water shrinkage of 0 to 3%, and a thickness of 0.4 to 1. 5d of acrylic staple fiber B is mixed and spun at a ratio of 30/70 to 50/50. 2 to 5 fine yarns having a fine yarn count of 1/30 Nm or more and a twist factor of 40 or more. A special design yarn obtained by plying in a direction opposite to the twisting direction, wherein staple fibers B mainly form fine loops 500 to 1500 / m on the surface of the special design yarn. It is a specially designed thread that does.

[0005]

Further, according to the present invention, an acrylic staple fiber A having a hot water shrinkage of 30% or more and a thickness of 0.8 to 2d,
An acrylic staple fiber B having a hot water shrinkage of 0 to 3% and a thickness of 0.4 to 1.5 d is used in a weight ratio of 30/70 to 50 /.
A fine yarn with a metric count of 1/30 Nm or more is manufactured by mixing and spinning at a ratio of 50, and then 2 to 5 of the single yarns are combined to have a twist coefficient (metric) of 40 or more and the twist direction of the single yarn. Specially characterized by twisting and twisting in the opposite direction and heat-treating to form fine loops 500-1500 / m of acrylic staple fibers B having a hot water shrinkage of 0-3% on the surface of the yarn. It is a manufacturing method of design yarn.

The present invention will be described in detail below. In the present invention, the acrylic staple fiber A having a thickness of 0.8 to 2d and the acrylic staple fiber B having a thickness of 0.4 to 1.5d must be mixed and spun. This is because 0.4 to 1.5 d of ultrafine staple fibers B are present on the surface of the mixed yarn so that fine loops are densely present on the other hand, while acrylic staple fibers A of 0.8 to 2 d in thickness make the waist stiff. . Therefore, the staple fiber A must be larger than the staple fiber B.

Then, 0.8 to 2d staple fiber and 0.4 to 1.5d staple fiber are 30/70 to 5
It must be blended at a weight percentage of 0/50. When the staple fiber of 0.8 to 2d is less than 30% by weight, the stiffness is lost, and when it exceeds 50% by weight, fine loops existing on the surface are decreased, which is not preferable. On the other hand, the 0.4 to 1.5 d acrylic staple fiber must be present in an amount of 50 to 70% by weight so that fine loops are densely present on the yarn surface.

The acrylic staple fibers may be used in combination with staple fibers having various functions, and the length of the acrylic staple fibers B of 0.4 to 1.5d is preferably 38 to 76 mm. If it is less than 38 mm, the loop becomes unstable, and if it exceeds 76 mm, the loop is stabilized, but the yarn form is not preferable. The presence of close-packed fine loops gives a suede-like appearance.

It is preferable that the surface of the specially designed yarn of the present invention has fine loops of 500 loops / m to 1500 loops / m. This is preferable because it leads to the presence of multi-density fluff and further emphasizes the suede-like appearance.

Next, the cross-sectional area shapes of the above-mentioned two kinds of staple fibers may be round, triangular, flat, or the like.
Further, the staple fibers A and B are mixed-spun to form a fine count yarn having a single yarn count of 1/30 Nm or more, but the staple fiber B mainly forms fine loops on the yarn surface.

The thickness of the single yarn is 1/30 in the metric type.
It must be a fine count of Nm or more. This single yarn is 2
This is because five twisted yarns are formed into beautiful yarns, and the number of staple fibers in a single yarn is preferably 120 or more, and more fine loops are present.

Further, the above-mentioned single yarn has a twisting coefficient of 4 between 2 and 5
It must be 0 or more and twisted in the opposite direction to the single yarn. If the twist coefficient is not more than 40, it will not be a strongly twisted yarn, and it will not be possible to make the twists exist substantially at right angles to the longitudinal direction of the plied yarn, which will not lead to stabilization of the loop.

The twist coefficient K is expressed by T = K · Nm ^1/2 . Here, T is the twist number (t / m), and Nm is a metric number.

Here, the manufacturing method of the present invention will be described. First, the hot water shrinkage is 30% or more and the thickness is 0.8 to 2
acrylic staple fiber A of d and hot water shrinkage ratio of 0 to 3
% Smaller than staple fiber A in 0.4-1.5
Blend with acrylic staple fiber B of d. Blended
It is carried out with raw cotton or with a sliver in the blended cotton process. The hot water shrinkage of the staple fiber A is 30% or more,
The reason is that the staple fibers B are subjected to heat treatment so as to be present in the central portion of the yarn, and the hot water shrinkage ratio of the staple fibers B is set to 0 to 3% because the staple fibers B are present on the surface of the yarn so that fine loops are densely present. Yes, the staple fiber B must therefore have a smaller thickness than the staple fiber A.

The acrylic staple fiber contains acrylonitrile as a polymerization component in an amount of 40% or more, preferably 6%.
The content is 0% or more, more preferably 85% or more, and further preferably 95% or more.

The blending ratio of the staple fiber A is 30 to 50.
Must be included by weight. This is to provide a firmness and the remaining staple fibers B are dense loops.

Next, the yarn is mixed and spun into yarn, and a metric type fine yarn of 1/30 Nm or more is made. This is to improve the yarn form.

Further, the single yarn is applied with a twist number of 40 or more in a metric system in a direction opposite to the twist direction of 2 to 5 undertwist.
This is to stabilize the yarn form by making the twists beautiful and making the twists inconspicuous and by orienting the twists in the longitudinal direction of the yarn.

Then, by heat treatment, a large number of fine loops are densely present on the surface of the plied yarn in a stable manner, and a suede-like bulky yarn is obtained.

[0021]

【Example】

Example 1 Acrylic staple fiber A having a hot water shrinkage of 40% and acrylic staple fiber B having a hot water shrinkage of 0% were mixed and spun at a ratio of 40:60 to produce a 1/40 Nm fine spun yarn, and further four It was twisted and heat treated. At this time, the knitting characteristics of the staple fiber A and the staple fiber B were examined while changing the dur of the staple fiber A and staple fiber B.

[0022]

[Table 1]

In Table 1, the denier of NO1 was out of the range of the present invention. Therefore, although the bulkiness and feel were good, the yarn form was poor and the gloss was poor. NO2, 3
The thread form was excellent. Here about the feeling ○
Indicates that the yarn form is good, ⊚ indicates that the yarn form is excellent, Δ indicates that the yarn form is poor, and that indicates that the bulky condition indicates that the circle is good. The knitted fabric was a flat knit and evaluated with a 7G × 1P textured structure.

Example 2 The influence of the staple fiber A on the yarn form was evaluated by changing the hot water shrinkage ratio. The results are shown in Table 2. As is clear from Table 2, the shrinkage ratio of the staple fiber A is 30, 40.
%, The yarn form was particularly good. In Table 2, ◎
Indicates excellent, ◯ indicates good, and Δ indicates defective.

[0025]

[Table 2]

Example 3 The effect of the single yarn count on the yarn morphology was evaluated. The yarn count was adjusted by adjusting the number of spun single yarn yarns and the number of twists to match the dyed yarn count. The results are shown in Table 3.

[0027]

[Table 3]

As is clear from Table 3, the single yarn is 1/30
It became clear that a fine count of Nm or more is preferable.

Example 4 The effect of the twisting coefficient at the time of ply twisting of a single yarn on the yarn form was evaluated. The results are shown in Table 4.

[0030]

[Table 4]

It has been found that a twist factor of 40 or more has a particularly good effect on the yarn form.

[0032]

EFFECTS OF THE INVENTION The specially designed yarn of the present invention is a bulky yarn having rounded fine loops densely present on the yarn surface, and it is a suede-like bulky yarn, and the knitted fabric using this yarn has excellent texture. The acrylic knitted fabric having a bulky property, moderate tension and a light weight feeling and a suede-like appearance is obtained. According to the method of the present invention, such a suede-like special design yarn can be reliably obtained.

Claims (2)

(57) [Claims] 1. A hot water shrinkage ratio of 30% or more and a thickness of 0.8.
2d of acrylic staple fiber A, which is thinner than the staple fiber A, has a hot water shrinkage of 0 to 3%, and a thickness of 0.4 to
30/70 with 1.5d acrylic staple fiber B
Single yarn count 1/30 Nm mixed to 50/50
A special design yarn composed of 2 to 5 fine yarns of the above fine count and a twist coefficient of 40 or more and twisted in a direction opposite to the twisting direction of the single yarn, and the surface of the special design yarn is mainly A special design yarn characterized in that the staple fibers B form fine loops 500 to 1500 pieces / m. 2. A hot water shrinkage ratio of 30% or more and a thickness of 0.8 to
2d acrylic staple fiber A and hot water shrinkage 0
Acrylic staple fiber B having a thickness of 0.4 to 1.5 d and a weight ratio of 30% to 30/70 to 50/50 was mixed and spun into a fine count single yarn having a metric count of 1/30 Nm or more. Then, 2 to 5 of the single yarns are combined and twisted in a direction opposite to the twisting direction of the single yarn with a twist coefficient (metric type) of 40 or more, and heat treated to obtain a hot water shrinkage ratio on the surface of the yarn. Fine loop 500 consisting of 0 to 3% acrylic staple fiber B
A method for producing a specially designed yarn, which comprises forming 1500 yarns / m.