JP2973828B2 - Spunlike fluff yarn and method for producing the same - Google Patents

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 multifilament yarns having the bulkiness and fluff characteristics of spun yarn and a method for producing the same.

[0002]

2. Description of the Related Art There have been many proposals of spun-like fluff yarns which have attempted to impart the bulkiness and fluff characteristics of a spun yarn to a synthetic multifilament yarn. As a method for producing this spun-like fluff yarn, there is a method in which the multifilament yarn is temporarily twisted or twisted while rubbing with a blade.However, since this method wears the blade over time, the number of fluffs in the yarn longitudinal direction and There was a drawback that the yarn strength also changed over time and the yarn streaks became uneven.

[0003] Further, in the case of a multifilament yarn, only one side of the yarn is scratched by a blade, or the fuzz-generating portion is biased due to fluctuation of the abrasion tension and the fuzz is curled. No fluff close to the length could be obtained, and only those with a small number of fluff could be obtained. For this reason, the obtained fluff yarn cannot be said to have sufficient bulkiness and fluff characteristics inherent to spun yarn.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a spun-like fluff consisting of multifilament yarns having the characteristic bulkiness and fluff characteristics of spun yarn, and a method for producing such spun-like fluff. To provide a manufacturing method.

[0005]

The spun-like fluff yarn of the present invention, which achieves the above object, comprises a plurality of multi-filament yarns having a lower twist, which are aligned and upper-twisted. A part of the single fiber filament constituting the yarn is shortened, and one end of the short fiber is constrained by the lower twist and the upper twist, and is a fluff that protrudes as fluff on the yarn surface, and protrudes from the fluff. 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 / m, and a wool characteristic U% of 1.0 to 2.0%. It is characterized by having.

In the method for producing a spun-like fluff yarn, the multifilament yarn given the lower twist in the lower twisting step is reciprocally wound around a guide, and the outward yarn and the return yarn are mutually joined. It is characterized in that both yarns are simultaneously twisted and handled by interlacing to perform fluffing, and then, in the upper twisting step, a plurality of the fluffed multifilament yarns are aligned and upper twisted. is there.

The present invention will be described below with reference to an embodiment shown in the drawings. FIG. 1 shows the appearance of an example of the spun-like 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 single fiber filament is randomly cut in the longitudinal direction to be shortened, and the ends of the short fibers are constrained by the lower and upper twists, forming a large number of fluffs and protruding from the yarn surface. ing. In addition, some of the ends of the short fibers may have a fuzzy fluff with the ends sandwiched between upper ends. Each of these fluffs I and B has no crimp and has a substantially straight shape.

[0008] Among the fluff protruding surface of the fluff yarn Y _K,
90% or more of the total number of fluffs has an appropriate fluff length of 1 to 5 mm, and the number of fluffs having a fluff length in this range is 2%.
The number is as large as 00 to 950 pieces / m. By thus fluff yarn Y _K has a number of well 200 / m or more fuzz fluff length moderate, not obtained by the conventional spun-like fluff yarn, peculiar closer to more spun yarns It gives a spun-like texture with an extremely soft touch. The effect of such a span-like texture is
The less the number of fluffs having a fluff length of 1 to 5 mm is less than 200 / m, the less it can be obtained.

Moreover, the fluff yarn Y _K, since fluff is granted based on the multi-filament yarn, filament is very uniform, and the yarn unevenness when evaluated in Usuta characteristic U%, 1 It is an extremely small value of 0.0 to 2.0%. Because of such uniform thread streaks, the stitches particularly when used for sewing threads can be leveled, and the appearance can be made extremely good.

[0010] Generally, 1.5% is used for raw yarn filament yarn (lower thread and upper thread inserted) that is not fluffed.
The wool characteristic U% is 2.0% or less as a fluff yarn because the spun yarn having a large yarn unevenness is 7% or more.
Beyond, the difference between the thick part and the details becomes noticeable,
In particular, when used for sewing threads, the seams appear uneven.

In the present invention, the number of fluffs is 10 cm.
The fluff collected to a length of 20 mm is projected 20 times with a universal projector, and the number actually measured together with the fluff length is 1 m.
It is converted to the number per hit. In addition, the Uster characteristic U% of the yarn unevenness is KET-80 manufactured by Keiki Kogyo KK
B was measured. In the above-described spun-like fluff yarn of the present invention, a plurality of multifilament yarns constituting the same are each composed of a single fiber filament group having a small single yarn fineness and a single fiber filament group having a single yarn fineness larger than this. It consists of at least two types of combinations.
Then, the single fiber filament group having a small single yarn fineness is selectively shortened, and the single fiber filament group having a large single yarn fineness is hardly shortened.

In general, an inverse correlation is established such that as the number of fluff yarns increases, the yarn strength decreases. However, since the spun-like fluff yarn of the present invention has a single-filament filament having a small single-filament fineness as a fluff component, a single-filament filament having a large single-filament fineness is present as a yarn strong component, so that the yarn configuration is such that There is a feature that the yarn strength can be kept high while increasing the number of fluffs.

As an example of a combination of two types of single fiber filaments constituting a multifilament yarn, the single fiber fineness of a single fiber filament group having a small single yarn fineness is 0.1 to 0.1%.
It is preferable to combine the single fiber finenesses of the group of single fiber filaments having a thickness of 1.5 denier and single yarn fineness with a range of 3.5 to 10 deniers, and it is desirable to have a denier difference of at least 2 deniers or more.

The number of monofilament filaments constituting the multifilament yarn is preferably 20 to 150 per multifilament yarn. Further, the composition ratio between the number of the single fiber filament group having the large single-filament fineness and the number of the single fiber filament group having the fine single-filament fineness is such that the single-filament filament group having the large single-filament fineness has a range of 5 to 50%. It is preferred to have a small percentage.

If the number of monofilament filaments in the multifilament yarn is less than 20, it is not possible to generate a sufficient number of fluffs, and it is difficult to obtain the spun-like texture that is the object of the present invention. Therefore, the number of single fiber filaments is set to 20 or more, and the larger the number of single fiber filaments, the more the number of fluffs generated in the fluff can be generated. However, it is not preferable that the number is more than 150 since a nep is generated and a yarn surface is disordered.

The number of fluffs generated in the fluff can be increased by increasing the composition ratio of the group of single fiber filaments having a small fineness in the multifilament yarn. However, if the ratio of the single fiber filament group having a fine single yarn fineness is too large, the yarn strength is reduced. Therefore, in order to maintain the yarn strength, the composition ratio of the single fiber filament group having a large single yarn fineness is 5 to 50%. It is desirable to be within the range.

The material of the multifilament yarn constituting the spun-like fluff 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 of polyester, nylon or the like, and a high-strength type with low elongation. The fineness of the multifilament yarn is 10 to 50
At 0 denier, the number of monofilament filaments is 20 to
Increase to 150. In particular, in the case of a polyester filament yarn for clothing, it is preferable that the denier is 30 to 100 deniers and the number of single fiber filaments is 20 to 150.

The cross-sectional shape of a single fiber filament is generally circular, but may be a triangular, Y-shaped, pentagonal, hollow, flat or other irregular cross-section, and may have high gloss.
Special varieties such as low gloss can also be used. Also,
At least two types of single-filament filaments constituting the multifilament yarn may be constituted by a difference in yarn strength between those that are made shorter and those that are not made shorter by the denier difference as described above. The denier structure may be the same, and a difference in yarn strength or a difference in elongation may be provided in the single fiber filament itself.

In the above-described method for producing a spun-like fluff yarn according to the present invention, the multi-filament yarn lower twisting step and the plurality of lower twist yarns obtained in the lower twisting step are aligned and the upper twist is applied. It consists of a twisting process. In the lower twisting step, the multifilament yarn after giving the lower twist is reciprocally wound around the guide, and the yarn on the forward path toward the guide and the yarn on the returning path are crossed with each other, so that both yarns are crossed. Applying strong twist and handling to the yarn at the same time, the fluff is processed.

In the twisting machine that gives the lower twist in the lower twist process,
A twisting machine called an up twister or 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 the yarn runs during drawing or after winding after giving the lower twist. FIG. 2 shows an example of a case in which the lower twist is performed by an up twister and then the fluff is processed.

The multifilament yarn Y wound on the bobbin 1 is composed of at least two types of single fiber filaments having different single yarn finenesses. The bobbin 1 is mounted on a spindle 2 and is driven to rotate 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 lower twist is applied to the multifilament yarn Y with the feed roller 4 in the S direction or the Z direction. The multifilament yarn Y into which the lower twist is inserted is subjected to fluffing by a yarn-yarn self-rubbing device including a guide roller 5 and a pin 10 while being tensioned between the feed rollers 4 and 6.

As shown in FIG. 3, the fluffing is performed by reciprocating the multifilament yarn Y around the guide roller 5, and the yarn Y on the outward path toward the guide roller 5 is wound.
a and the returning yarn Yb are crossed with each other at the pin 10, and at the crossing point P, both the yarns Ya and Yb are simultaneously subjected to strong twisting and handling, and the single fiber filament constituting the multifilament yarn Y Fuzz is generated by shortening a part of the group. The multifilament yarn Y having fluff generated in this manner is wound around the cheese 7 from the feed roller 6 via the take-up roller 8.

In the above interlacing process, the yarn Ya on the outward path is
Is twisted by about 90 ° by intersecting with the yarn Yb on the return path, and the yarn Yb on the return path is also twisted by about 90 ° by interlacing with the yarn Ya on the outward path. Can be Therefore, the multifilament yarn Y reciprocally passes through the crossing point P, so that a total of about 18
A 0 ° twist will be provided.

In the above-described crossing process, to stabilize the twisting and handling at the crossing point P, a pin 10 or a 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 exit 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 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.

The tension at the time of this crossing process is as follows:
It is preferable that both the return route and the forward route be 0.3 g / d or more. Also, the twist given by this crossing process is
The angle should be 180 ° or more, preferably 360 ° or more. By giving a twist of 180 ° or more in the interlacing process, more than half of the outer circumference of the yarn can be brought into frictional contact with the other yarn, thereby randomizing the cutting of the single fiber filament in the yarn longitudinal direction, It is possible to randomize even between the single filaments. Further, by randomizing the cutting in this way, the thread streaks as the fluff can be made more uniform.

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

In the self-rubbing method based on the yarn-to-yarn interlacing process, the single fiber filament group having a small single-filament fineness is selectively shortened, and the single-filament filament group having a large single-filament fineness is almost a short fiber. Can be avoided.
Therefore, in the step of applying the lower twist with the twisting machine, the fluff can be easily processed by attaching the yarn-yarn self-rubbing device as a continuous process.

In performing such a crossing treatment, the yarn traveling speed is preferably set to 3 to 50 m / min. 50m
When the crossing process is performed at a speed higher than / min, the instantaneous frictional heat generated by self-rubbing causes the single-filament filaments to be embrittled or scraped. As a result, the yarn quality may be reduced.

If 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, the multifilament yarn is twisted or inverted during running due to the low speed, and the entire surface around the yarn can be uniformly rubbed, so that there is no difference in dyeing. Further, white powder generated when the yarn is rubbed can be suppressed, and adhesion of white powder to a heald or a shed during weaving and clogging of the sewing needle with white powder during sewing can be improved. However, if the speed is too low, the productivity is reduced, so the lower limit is preferably set at 3 m / min.

As described above, the multi-filament yarn which has been subjected to the fluff processing in the lower twisting step is drawn and aligned, and the yarn is spun while applying the upper twist to obtain the spun-like fluff yarn of the present invention. . The number of alignments before giving the top twist is generally two, but the balance is three.
It is preferable to use an odd number such as seven or seven. Further, the yarns for aligning the plurality of yarns may be multifilament yarns having different numbers of lower twists, or multifilament yarns having different lower twist directions.

The number of upper twists and the number of lower twists are preferably set such that the direction of twist and the number of twists are maintained so as to maintain the torque balance when fluff is formed. In addition, the lower twist direction and the upper twist direction are directions opposite to each other, and it is preferable that the number of upper twists is about 60 to 90% of the number of lower twists.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In accordance with the lower twisting process using an up twister as shown in FIG. 2, a polyester multifilament yarn of 70 denier and 42 filaments (six single denier monofilament filaments of 36 deniers and 36 single denier single fiber filaments of 36 denier filaments) was used. 966 T / m in the S direction, the yarn traveling speed is 10 m / min, the forward side 30 g,
Wrap around the guide roller under high tension of 150 g on the return side,
The yarns on the outward path and the yarns on the return path were interlaced in the S direction, and a twist of about 360 ° was applied to give a fluff.

Next, the obtained fluff yarns are aligned in three lines,
Spun like fluff was produced by applying a top twist of 709 T / m in the direction. The characteristics of this spun-like fluff yarn were as follows. Fluff length 1-5mm (100% of total fluff) Short fiber length Average 266mm Strength 1250g (Strength variation (CV) 2.5%) Fluff number 320 / m Wooster characteristics U% 1.76% In the above fluff processing , 6 denier single fiber filaments were not shortened in all six filaments, but all 36 denier single fiber filaments were shortened, resulting in a short fiber length distribution as shown in FIG. The number of filament yarns of each fiber length was relatively uniform.

When the obtained fluff yarn was woven in a plain weave,
It had a soft, moist, and high-quality feel. In addition, when this fluff yarn was evaluated as a sewing thread after dyeing and finishing, the sewability was good and the appearance of the finished sewn was good.

[0035]

Comparative Example Using the same uptwister and polyester multifilament yarn as in the example, the polyester multifilament yarn was subjected to a lower twist of 966 T / m in the S direction, and the yarn running speed was 10 m / min. Saga # 4
At 00, a round bar having a diameter of 20 mm was rubbed with a contact angle of 90 °, an entrance tension of 20 g, and an exit tension of 45 g to perform fluffing.

Next, three obtained fluff yarns are aligned and
The top was twisted at 709 T / m in the Z direction to produce a fluff yarn. The characteristics of the fluff were as follows. Fluff length 6 to 12 mm Strength 1015 g (Strength of variation (CV) 3.9%) Fluff 80 / m (mostly slack or loop, the fluff ratio is 18% of these protruding single fiber filament yarns) The wool characteristic U% 2.25% In the above-mentioned fluffing process, one out of six 6-denier single fiber filament yarns was shortened, and 36 1-denier single fiber filaments were used. Three of them were not shortened.

[0037]

As described above, in the fluff according to the present invention, 90% or more of the total fluff is fluff having a fluff length of about 1 to 5 mm and a length close to the length of the spun yarn, and the number of fluff is 200 to 95.
Since the number is as large as 0 / m and the thread streaks are uniform, a spun-like touch texture very similar to the bulkiness and fluff characteristics inherent to spun yarn can be achieved.
Therefore, when used for clothing, it is possible to exhibit a very soft and moist texture with a high-quality feel.

Further, the thread streaks are uniform, and the
% Is a small value of 1.0 to 2.0%, especially when used for a sewing thread, a smooth unwinding property from a cone, between a sewing thread and a needle, or between a sewing thread and a fabric. The smoothness between the two can be improved, and the sewability can be improved. Further, the appearance of the seam can be improved by the uniform thread line.

[Brief description of the drawings]

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

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

FIG. 3 is a perspective view showing a main part of a fluff processing portion in the step of FIG. 2;

FIG. 4 is a fiber length distribution diagram of a filament that has been shortened in fluff.

[Explanation of symbols]

Y _K Spanlike fluff Y Y Multifilament yarn A, B Fluff 1 Bobbin 2 Spindle 4 Feed roller 5 Guide roller 6 Feed roller 7 Cheese

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-55-12873 (JP, A) JP-A-52-31148 (JP, A) JP-A-4-41729 (JP, A) JP-A-2- 210035 (JP, A) JP-A-3-64546 (JP, A) JP-A-7-331549 (JP, A) JP-A-5-239731 (JP, A) JP-A-1-272840 (JP, A) JP-A-3-27144 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) D02G 3/42 D02G 3/28 D02J 3/02 F-term theme code 4L036

Claims (4)

(57) [Claims] Claims: 1. A plurality of multi-filament yarns having a lower twist are aligned and subjected to an upper twist, and a part of the single fiber filaments constituting the multi-filament yarn is shortened. One end of the short fiber is a fluff that 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 fluff that protrudes from the fluff has a fluff length of 1 to 5 mm. The number of fluff is 2
A spun-like fluff yarn having a yarn unevenness of 100 to 950 pieces / m and a Uster characteristic U% of 1.0 to 2.0%. 2. The number of single fiber filaments constituting the multifilament yarn is 20 to 150, and the multifilament yarn is composed of at least two types of single fiber filament groups having different single yarn finenesses 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 shortened. 3. A multifilament yarn provided with a lower twist in a lower twisting step is reciprocally wound around a guide, and the outward yarn and the return yarn are interlaced with each other to twist both yarns. A method for producing a spun-like fluff yarn in which a plurality of multi-filament yarns subjected to the fluff processing are drawn and aligned in the upper-twisting step, and the upper-twisting is performed. 4. The method for producing a spun-like fluff yarn according to claim 3, wherein the fluff processing speed when the multifilament yarn is reciprocally wound around the guide is 3 to 50 m / min.