JPH0874137A - Spun-like nap yarn and its manufacture - Google Patents

Abstract

PURPOSE: To obtain spun-like nap yarn having bulkiness and napping properties characteristic to spun yarn and made of multifilament yarns, and to provide a method for effectively producing the spun-like nap yarn. CONSTITUTION: Plural multifilament yarns Y having primary twists are arranged properly and final twists are applied on them. A part of monofilaments which constitute the multifilament yarns Y are made to short fibers and the short fibers protrude as naps A and B. Ninety % or more than 90% of the total naps are 1-5 mm in nap length. The objective spun-like nap yarn has a nap number of 200-950/m and Uster characteristics (U%) of 1.0-2.0%. The production method is as follows. Multifilament yarns Y having primary twists are reciprocally wound on a guide 5 and going yarns Ya and returning yarns Yb are entangled with each other. In this napping processing, the yarns Ya and Yb are imparted with twisting and hackling. In the following final twisting process, plural yarns are arranged properly and they are twisted and the objective spun- like nap yarn is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spun-like fluff yarn composed of a multifilament yarn having the bulkiness and fluff characteristics of a spun yarn, and a method for producing the same.

[0002]

2. Description of the Related Art Heretofore, there have been many proposals for spun-like fluff yarns, which have been attempted to impart the bulkiness and the fluff characteristics of spun yarns to synthetic fiber multifilament yarns. As a method for producing this spun-like fluff yarn, there is a method of temporarily twisting or twisting while rubbing a multifilament yarn with a blade, but in this method, since the blade wears with time, the number of fluffs in the yarn longitudinal direction and The yarn strength also changes with time and the yarn streak becomes uneven.

Further, in a multifilament yarn, only one side surface of the yarn is rubbed by a blade, or the fuzz generation portion is biased due to fluctuations in the rubbing tension, and the fluff is curled. No fluff close to the length was obtained, and only fluff with a small number of fluffs was obtained. Therefore, it cannot be said that the obtained fluff yarn is sufficiently provided with the peculiar bulkiness and fluff characteristics of the spun yarn.

[0004]

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a spun-like fluff yarn comprising a multifilament yarn having the peculiar bulkiness and fluff characteristics of the spun yarn, and rationalizing the spun-like fluff yarn. It is to provide a manufacturing method obtained in.

[0005]

In the spun-like fluff yarn of the present invention which achieves the above object, a plurality of multifilament yarns having a lower twist are aligned and twisted to obtain a multifilament. A part of the monofilament filaments forming the yarn is made into a short fiber, and one end of the short fiber is a fluff yarn that is restrained by the lower twist and the upper twist and protrudes as fluff on the yarn surface, and protrudes from the fluff yarn. 90% or more of the total number of fluffs having a fluff length of 1 to 5 mm, the number of fluffs having a fluff length of 200 to 950 pieces / m, and a Woolster characteristic U% of 1.0 to 2.0% It is characterized by having.

Further, in the above-described method for producing a spun-like fluff yarn, the multifilament yarn, which has been given a lower twist in the lower twist process, is reciprocally wound around a guide, and the forward yarn and the backward yarn are mutually reciprocally wound. By twisting and twisting both yarns at the same time by interlacing, fluffing is performed, and then, in the upper twisting step, a plurality of the fluffed multifilament yarns are aligned and twisted. is there.

The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 shows the appearance of an example of the spunlike fluff yarn of the present invention. The spun-like fluff yarn Y _K is multifilament yarn Y of a plurality of each under twist has been performed, has a configuration in which the upper twist was twisted hooked. Each multifilament yarn Y is composed of a plurality of single fiber filaments,
A part of the monofilament filaments is randomly cut in the longitudinal direction to be made into short fibers, and the ends of the short fibers are restrained by the lower twist and the upper twist, and a large number of fluffs are projected on the yarn surface. ing. In addition, some of the ends of the short fibers are fluffy in the shape of tarmi, sandwiched between the upper ends. Each of these fluffs a and b has no crimp and is characterized by a substantially straight shape.

Of the fluff protruding on the surface of the fluff yarn Y _K ,
90% or more of the total fluff has an appropriate fluff length of 1 to 5 mm, and the number of fluff having the fluff length in this range is 2
It is a large number of 00 to 950 pieces / m. Since the fluff yarn Y _K has a large number of fluffs with an appropriate fluff length of 200 fibers / m or more, it is possible to obtain a peculiarly close to the spun yarn, which cannot be obtained with the conventional spun-like fluff yarn. It will have a very soft feel and a span-like texture. The effect of such a spun-like texture is
The less the number of fluffs having a fluff length of 1 to 5 mm is less than 200 fluff / m, the less fluff is obtained.

Further, since the fluff is applied to the fluff yarn Y _K based on the multifilament yarn, the yarn lines are extremely uniform, and the yarn unevenness when evaluated by the Uoster characteristic U% is 1 It is an extremely small value of 0.0 to 2.0%. Since the thread has a uniform thread as described above, it is possible to make the seams even when used for a sewing thread, and to improve the appearance.

[0010] Generally, 1.5% for raw filament yarns without fluffing (twisted yarn with lower twist and upper twist)
Since it is 7% or more for a spun yarn having a large yarn unevenness, the ooster property U% as a fluff yarn is 2.0%.
Beyond, the difference between the thick part and the detail becomes noticeable,
Especially when the sewing thread is used, the seams appear uneven.

In the present invention, the number of fluff is 10 cm.
The fluff yarn sampled in the length of 1 is enlarged and projected 20 times using a universal projector, and the number measured with the fluff length in that state is 1 m.
It is converted into the number of hits. The Worcester characteristic U% of the thread unevenness is KET-80 manufactured by Keisokuki Kogyo Co., Ltd.
It was measured in B. In the above-described spun-like fluff yarn of the present invention, a plurality of multifilament yarns constituting the single-filament filament group having a small single-filament fineness and a single-fiber filament group having a single-filament fineness larger than that It consists of at least two types of combinations.
The single-fiber filament group having a small single-fiber fineness is selectively made into short fibers, and the single-fiber filament group having a large single-fiber fineness is configured to be hardly made short-fiber.

In general, an inverse correlation is established in which the yarn strength decreases as the number of fluffs in the fluff yarn increases. However, the spun-like fluff yarn of the present invention has a single fiber filament with a fine single fiber fineness as a fluff component, while a single fiber filament with a large single fineness is present as a yarn strength component, It has the feature of maintaining high yarn strength while increasing the number of fluffs.

As an example of a combination of two kinds of single fiber filament groups constituting a multifilament yarn, the single fiber fineness of a single fiber filament group having a small single fiber fineness is 0.1 to 10.
It is advisable to combine the thick monofilament filaments having a single denier of 1.5 denier with a single filament fineness in the range of 3.5 to 10 denier, and it is desirable to have a denier difference of at least 2 denier or more.

The number of monofilament filaments constituting the multifilament yarn is preferably 20 to 150 per multifilament yarn. In addition, the composition ratio of the number of monofilament filament groups of thick single yarn fineness to the number of monofilament filament groups of thin single yarn fineness is in the range of 5 to 50% for monofilament filament groups of thick single yarn fineness. It is preferable to use a small percentage.

If the number of monofilament filaments in the multifilament yarn is less than 20, a sufficient number of fluffs cannot be generated, and it becomes difficult to obtain the span-like texture which is the object of the present invention. Therefore, the number of monofilament filaments is 20 or more, and the larger the number of filaments, the larger the number of fluffs generated in the fluff yarn. However, if the number is more than 150, nep is generated and the yarn surface is disturbed, which is not preferable.

Further, in the multifilament yarn, the number of fluffs generated in the fluff yarn can be increased as the composition ratio of the single fiber filament group having a fine single yarn fineness is increased. However, if the ratio of the single filament filament group of the thin single yarn fineness is too large, the yarn strength is lowered. Therefore, in order to maintain the yarn strength, the composition ratio of the single filament filament group of the thick single yarn fineness is 5 to 50%. It is desirable to set the range.

The material of the multifilament yarn constituting the spun-like fluff yarn of the present invention is not particularly limited as long as it is a synthetic fiber. It is preferable to use a thermoplastic synthetic fiber filament yarn such as polyester or nylon, and use a high tenacity type with low elongation. The fineness of the multifilament yarn is 10 to 50
With 0 denier, the number of monofilament filaments is 20 to
Make 150. Particularly, in the case of polyester filament yarn for clothing, it is preferable that the denier is 30 to 100, and the number of monofilament filaments is 20 to 150.

The cross-sectional shape of the monofilament filament is generally circular, but in addition to this, it may have an irregular cross-section such as a triangle, a Y-shape, a pentagon, a hollow or a flat shape, and a high gloss,
Special varieties such as low gloss can also be used. Also,
At least two kinds of monofilament filament groups constituting the multifilament yarn may have a difference in yarn strength between a short fiber and a non-short fiber by the denier difference as described above. The denier structure may be the same, and the filament strengths may be different from each other or the elongation may be different from each other.

The above-described method for producing the spun-like fluff yarn of the present invention comprises the steps of lower twisting of a multifilament yarn and aligning a plurality of lower twisting yarns obtained in the lower twisting step to apply upper twisting. It consists of a twisting process. In the lower twisting process, the multifilament yarn after giving the lower twist is wound around the guide in a reciprocating manner, and the yarn on the outward path facing the guide and the yarn on the returning path are crossed with each other, thereby The yarn is given a strong twist and a handle at the same time to fluff.

The twisting machine that gives the lower twist in the lower twist process,
A twisting machine called an up twister, a covering machine, an italian twisting machine, a double twister, or the like can be used. The part to be fluffed in this twisting machine is
There is no particular limitation as long as it is a portion where the yarn runs, such as during aligning after applying the lower twist or before winding. FIG. 2 shows an example of a case in which fluffing is performed after the lower twist is applied by the up twister.

The multifilament yarn Y wound up on the bobbin 1 is composed of at least two types of monofilament filaments having different monofilament fineness. The bobbin 1 is mounted on a spindle 2 and is rotationally driven by a belt 3. When the multifilament yarn Y is pulled out in the axial direction of the bobbin 1 while rotating the spindle 2, a downward twist is applied to the multifilament yarn Y with the feed roller 4 in the S direction or the Z direction, and then. The multifilament yarn Y into which the lower twist is inserted is fluffed by the yarn-yarn self-rubbing device composed of the guide roller 5 and the pin 10 while tension is applied between the feed rollers 4 and 6.

In this fluffing, as shown in FIG. 3, when the multifilament yarn Y is reciprocally wound around the guide roller 5, the yarn Y on the outward path toward the guide roller 5 is formed.
When a and the yarn Yb on the outward path returning are crossed at the pin 10 and a strong twist and a handle are simultaneously applied to both yarns Ya and Yb at the intersecting point P, a monofilament filament constituting the multifilament yarn Y Fluffs are generated by shortening a part of the group. The multifilament yarn Y that has generated fluffs in this way is wound around the cheese 7 from the feed roller 6 through the take-up roller 8.

In the above-mentioned interlacing process, the yarn Ya on the outward path side
The twist of about 90 ° is imparted by intersecting with the yarn Yb on the return path side, and the twist of about 90 ° is imparted to the yarn Yb on the return path side by intersecting with the yarn Ya on the outward path. To be Therefore, when the multifilament yarn Y is reciprocally passed through the intersection point P, a total of about 18
A twist of 0 ° will be given.

Further, in the above-mentioned crossing process, in order to stabilize the twisting and handling action at the crossing point P, the pin 10 or the roller may be arranged inside the crossing point P. More preferably, guide rollers 9, 11 or pins are arranged on the supply side and the yarn discharge side of the intersection point P, and the latter roller 11 or pin is moved in the direction of the arrow so as to cross the yarn path, and If the entrance / exit angle θ formed between the entrance side and the exit side is changed and adjusted, the degree of twisting and handling can be changed, whereby the number of fluffs can be adjusted.

As the tension when performing this crossing treatment,
It is preferably 0.3 g / d or more on both the return side and the outward side. Also, the twist imparted by this interlacing process is
It is preferably 180 ° or more, and more preferably 360 ° or more. By imparting a twist of 180 ° or more in the crossing treatment, it is possible to frictionally contact more than half of the outer circumference of the yarn with the yarn on the other side, thereby randomly cutting the single fiber filaments in the longitudinal direction of the yarn, It is also possible to randomize between the single filament filaments. Further, by randomizing the cutting in this way, it is possible to further uniformize the thread line as the fluff thread.

The twisting direction in the crossing treatment may be either the S direction or the Z direction, but it is preferable to perform the crossing treatment while twisting in the same direction as the downward twist direction. In this way, the number of fluffs can be increased by making the twisting direction the same as the lower twist. Further, the fluff length can be shortened by inserting a large number of lower twists and lengthened by inserting a small number.

In the self-rubbing method by the interlacing treatment between yarns and yarns, the monofilament filament group having a fine single filament fineness is selectively made into short fibers, and the monofilament filament group having a large monofilament fineness is almost made into short fibers. You can keep it from turning.
Therefore, fluffing can be easily performed by attaching the yarn-yarn self-rubbing device as a continuous process in the step of twisting with a twisting machine.

In carrying out such an interlacing treatment, the yarn running speed is preferably 3 to 50 m / min. 50m
When the cross-linking treatment is performed at a speed higher than / min, the instantaneous filament heat generated by self-abrasion causes the filament filaments to become brittle or chipped, resulting in a decrease in yarn strength and a lighter dyeing in the scratched area. As a result, the yarn quality may be degraded.

When the yarn traveling speed is set to a low speed of 50 m / min or less, instantaneous frictional heat is suppressed and the yarn strength is hardly reduced. Further, due to this low speed, the multifilament yarn is twisted or reversed during traveling, and the entire surface around the yarn can be rubbed uniformly, so that no difference in dyeing occurs. Further, it is possible to suppress the white powder generated when the thread rubs, and to improve the adhesion of the white powder to the healds and the reeds during the weaving, and the clogging of the sewing machine needle with the white powder during the sewing. However, if the speed is set too low too much, the productivity will be lowered, so it is preferable to set the lower limit to 3 m / min.

As described above, the multifilament yarns that have been fluffed in the lower twisting step are prepared by aligning a plurality of these filaments and then twisting them together while applying the upper twist to obtain the spunlike fluffy yarn of the present invention. . The number of lines to be aligned before giving the upper twist is generally two, but in terms of balance it is three.
It is preferable to use an odd number such as 7 or 7. Further, as the yarns for aligning the plurality of yarns, multifilament yarns having different numbers of lower twists may be used, or multifilament yarns having different lower twists may be used.

As for the number of upper twists and the number of lower twists, it is preferable to set the twist direction and the twist number so as to maintain the torque balance when the fluff yarn is formed. Further, the lower twist direction and the upper twist direction are directions opposite to each other, and the upper twist number is preferably about 60 to 90% of the lower twist number.

[0032]

EXAMPLE A 70-denier, 42-filament polyester multi-filament yarn (6 6-denier monofilament filaments and 1-denier monofilament filaments 36 according to the lower twisting process using an up twister as shown in FIG. 2). (Book structure) is subjected to a downward twist of 966 T / m in the S direction, the yarn traveling speed is 10 m / min, the forward pass side is 30 g,
Wrap around the guide roller under high tension of 150g on the return path,
The yarns on the outward path and the yarns on the return path were crossed in the S direction, and a twist of about 360 ° was applied to the yarns for fluffing.

Next, three fluff yarns obtained are aligned and Z
Spun-like fluff yarn was manufactured by twisting 709 T / m in the direction. The characteristics of this spunlike fluff yarn were as follows. Fluff length 1 to 5 mm (100% of the total number of fluffs) Short fiber length average 266mm Strength 1250g (Variability of strength (CV) 2.5%) Number of fluffs 320 / m Worcester characteristics U% 1.76% In the above fluff processing The 6 denier monofilament filaments were not made into short fibers, but all the 1 denier monofilament filaments were made into short fibers, and the short fiber length distribution shown in FIG. 4 was obtained. The number of filament yarns of each fiber length was relatively uniform.

When the obtained fluff yarn was woven into a plain weave,
It had a high-quality texture that was soft and moist to the touch. When this fluff yarn was evaluated as a sewing thread after dyeing and finishing, it was found that the sewability was good and the appearance after sewing was good.

[0035]

[Comparative Example] Using the same up twister and polyester multifilament yarn as in the example, the polyester multifilament yarn was twisted downward in the S direction by 966 T / m, and the surface roughness was obtained at a yarn running speed of 10 m / min. Saga # 4
At 00, a round bar rough surface having a diameter of 20 mm was rubbed with a contact angle of 90 °, an inlet tension of 20 g, and an outlet tension of 45 g to fluff.

Next, three fluff yarns obtained are lined up,
A fluff yarn was manufactured by twisting 709 T / m in the Z direction. The characteristics of this fluff yarn were as follows. Fluff length 6 to 12 mm Strength 1015 g (Variability of strength (CV) 3.9%) Number of fluff 80 / m (mostly "slack" or loops, and the fluff ratio is 18% of these protruding monofilament filament yarns. Wooster characteristics U% 2.25% In the above fluffing process, one of the 6 denier monofilament filament yarns was shortened, and 1 denier monofilament filament had 36 filaments. Three of them were not shortened.

[0037]

As described above, in the fluff yarn according to the present invention, 90% or more of the total number of fluffs are fluffs close to the length of the span yarn having a fluff length of 1 to 5 mm, and the number of fluffs is 200 to 95.
Since the number of yarns is 0 / m and is extremely large, and the yarn lines are uniform, it is possible to achieve a span-like touch texture that is extremely similar to the bulkiness and fluff characteristics peculiar to spun yarns.
Therefore, when it is used for clothing, it can be made to have an extremely soft and moist feel and a high-grade feel.

Further, the thread line is uniform, and its Worcester characteristic U
% Is a small value of 1.0 to 2.0%, so that when it is applied to a sewing thread, smooth unwinding from the corn, between the sewing thread and the needle, and between the sewing thread and the cloth The smoothness between the two can be improved, and the sewability can be improved. Further, the uniform thread line can improve the appearance of the seam.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a spunlike fluff yarn according to the present invention.

FIG. 2 is a schematic view showing an example of a method for producing a spunlike fluff yarn of the present invention.

FIG. 3 is a perspective view showing a main part of a fluffing part in the process of FIG.

FIG. 4 is a fiber length distribution diagram of filaments made into short fibers in a fluff yarn.

[Explanation of symbols]

Y _K Spun-like fluff Y Y multi-filament yarn I, R Fluff 1 Bobbin 2 Spindle 4 Feed roller 5 Guide roller 6 Feed roller 7 Cheese

Claims (4)

[Claims] 1. A plurality of multifilament yarns having a lower twist are aligned and subjected to an upper twist, and a part of the monofilament filaments constituting the multifilament yarn is made into a short fiber. One end of the short fiber is a fluff yarn which is constrained by the lower twist and the upper twist and protrudes as fluff on the yarn surface, and 90% or more of the total number of the fluff protruding from the fluff yarn has a fluff length of 1 to 5 mm, and Number of fluff length is 2
A spun-like fluff yarn having an unevenness of 0 to 950 yarns / m and having a Worcester property U% of 1.0 to 2.0%. 2. The number of monofilament filaments constituting the multifilament yarn is 20 to 150, and the multifilament yarn is composed of at least two kinds of monofilament filament groups having different monofilament fineness from each other,
The spun-like fluff yarn according to claim 1, wherein a single fiber filament group having a small single yarn fineness is selectively made into short fibers. 3. A multi-filament yarn, which has been given a lower twist in the lower twisting process, is reciprocally wound around a guide, and the forward yarn and the backward yarn are crossed with each other to twist the two yarns. A method for producing a spunlike fluff yarn, which comprises applying a handle at the same time to fluff, and then aligning a plurality of the fluffed multifilament yarns in the upper twisting step to twist the yarn. 4. The method for producing a spunlike fluff yarn according to claim 3, wherein a fluffing speed when the multifilament yarn is reciprocally wound around a gite is set to 3 to 50 m / min.