JPH06306720A - Spun yarn-like multifilament yarn - Google Patents

Abstract

PURPOSE:To obtain the subject multifilament yarn having excellent physical properties of yarn, applicable to thin woven fabric by treating polyester filament having differed fineness of single yarn in a specific state. CONSTITUTION:Blended yarns Y of polyester having different fineness of polyester filaments, comprising polyester filament of the maximum fineness of single yarn and polyester filament of the minimum fineness of single yarn of <=0.8 denier, having >=4, preferably >=5 ratio of fineness, provided with 3,000/D<1/2>-27,000/D<1/2> (D is fineness of mixed yarns) is napped by a rough face material to randomly cause >=20 fluffs l/m, preferably >=50 fluffs l/m mainly of the filament having <=0.8 fineness of single yarn. The napping treatment is preferably carried out by a multishaft circumscribing type false twist device having a rough face material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a fluff on the surface of a polyester multifilament mixed filament yarn by raising a part of the polyester multifilament mixed filament yarn, and has a texture and appearance like a spun yarn. The present invention provides a spun yarn-like multifilament yarn.

[0002]

2. Description of the Related Art A fluff is added to a multi-filament yarn,
Many attempts have been proposed in the past to give the appearance and touch of spun yarn.

For example, in Japanese Patent Laid-Open No. 61-296137, a multifilament yarn bundled with pressurized air is run in contact with a high-speed rotating grindstone body in a tensioned state, and a part of the bundled multifilament yarn is cut, A method of raising hair has been proposed. However, according to this method, since the yarn raising is performed while the focused multifilament yarn is in contact with the rough surface body in a tensioned state, excessive damage is given to the yarn,
The strength and elongation of the obtained yarn are both low, and there is a risk of impairing post-process passability and operability.

Further, in Japanese Unexamined Patent Publication No. 62-117841, after twisting a multifilament yarn, the multifilament yarn is passed through the blade body while being in contact with the blade body, and is passed through the blade body. A method of selectively cutting and retwisting is proposed. However, although the strength and elongation of the yarn obtained by this method can be prevented to some extent, there is a possibility that the raised state of the yarn may change abruptly over time from the viewpoint of the durability of the blade, etc. It seems that there is. In addition, after applying the yarn raising process,
Since it is necessary to twist the fibers again, there is a problem in terms of cost.

[0005]

SUMMARY OF THE INVENTION The present invention provides a spun yarn-like multifilament yarn in which the above-mentioned conventional drawbacks are eliminated and the obtained yarn has good physical properties and is capable of stable production. Is an issue.

[0006]

The present invention takes the following means in order to solve the aforementioned problems. That is, the present invention is a spun yarn-like multifilament yarn composed of polyester filaments having different single fiber fineness,
The fineness ratio between the polyester filament with the maximum single fiber fineness and the polyester filament with the minimum single fiber fineness is 4
Above, and the above-mentioned minimum single fiber fineness is 0.8 denier or less, and on the yarn surface of the spun yarn-like multifilament yarn, mainly 20 fluff / m or more of filaments having a single fiber fineness of 0.8 denier or less Yes, the fineness of the spun yarn-like multifilament yarn is 3000 / D as D denier
A spun yarn-like multifilament yarn, which is provided with a twist number (T / m) of ^{1/2 to} 27,000 / D ^1/2 .

The present invention will be described in detail below. The spun yarn-like multifilament yarn of the present invention is composed of polyester filaments having different monofilament fineness, in order to impart an appropriate bulge and fluff at least a part of the filament having the smallest monofilament fineness.

Further, the filament having the maximum single fiber fineness may take a form other than the ordinary drawn yarn, for example, thick and thin yarn having random thickness unevenness in the longitudinal direction of the yarn, or yarn. It is also possible to use a spun yarn-like texture and appearance by false twisting and imparting a slight crimp.

Regarding the single fiber fineness of the filament having the minimum fineness, it is necessary to appropriately adopt it within the range of 0.8 denier or less, more preferably within the range of 0.1 denier to 0.5 denier in consideration of the yarn raising property. If it is, it is very effective. When the single yarn fineness is in the range of less than 0.1 denier, a fabric structure is formed, and when dyeing is then performed, the fluff portion may be lightly dyed, so-called syracked state, and the appearance quality of the fabric structure may be impaired. . Conversely, the single yarn fineness is 0.
When it exceeds 8 denier, the yarn raising property is deteriorated and it becomes difficult to efficiently increase the number of fluffs. Single yarn fineness is 0.
When it is in the range of 8 denier or less, and more preferably in the range of 0.1 denier to 0.5 denier or less, the above-mentioned light dyeing of the fluff portion does not occur, and the yarn can be effectively raised and used. Is preferred.

The single fiber fineness (d ₁ ) of the filament having the maximum fineness is the single fiber fineness (d ₁ ) of the filament having the minimum fineness.
It is necessary to have a fineness ratio of 4 times or more, more preferably 5 times or more of ₂ ). If the fineness ratio (d ₁ / d ₂ ) is a value of less than 4, sufficient basic properties such as tension and waist when a fabric structure is obtained cannot be obtained, resulting in a so-called tactile state. Not preferable. The fineness ratio (d ₁ / d ₂ )
Has a value of 4 or more, the tension and waist of the fabric structure can be modified and the basic properties of the fabric can be satisfied.

The spun yarn-like multifilament yarn of the present invention is characterized in that filament yarns having a monofilament fineness of 0.8 denier or less are present on the side surface of the yarn at 20 or more per 1 m, and The filament different fineness mixed filament yarn is given a twist of 3000 / D ^1/2 or more and 27000 / D ^1/2 or less (D is the fineness of the mixed filament yarn). The number of actual twists of the polyester multifilament heterogeneity mixed yarn is 3000 / D ^1/2 or more 2
It is necessary to take the range of 7,000 / D ^1/2 or less (D is the fineness of the mixed fiber). The actual twist insertion number is 3000 / D
^{When it is} less than ^{1/2, the} yarn is in a so-called sweet twisted state, and it is difficult to obtain the yarn physical properties that can be practically used because the yarn physical properties cannot be suppressed by the yarn raising process. Further, if the range exceeds 27,000 / D ^1/2 , the so-called strong twist effect will be strongly colored, and it will be difficult to sufficiently bring out the effect of fluff. The actual twist insertion number is 3000 / D
^1/2 or 27000 / D ^1/2 can be suppressed excessive damage it if the yarn in the range, it and the it is possible to bring out the fluff effects sufficiently. Regarding the number of actual twists to be inserted, the range may be appropriately adopted in consideration of the texture of the fabric. For example, if it is desired to further improve the dry feeling of the fabric structure, the number of actual twists inserted is 8000 / D.
^In the range of ^1/2 or more and 27,000 / D ^1/2 or less, if you want to give more bulge, the actual twist insertion number is 3000 / D
^It may be appropriately adopted within the range of ^1/2 or more and 7,000 / D ^1/2 or less.

The spun yarn-like multifilament yarn of the present invention is characterized by randomly having 20 or more fluffs per 1 m in the longitudinal direction of the yarn. However, as for the method for measuring the number of fluffs, a multipoint fly counter (MODEL MFC-1110) manufactured by Toray Engineering Co., Ltd. was used, and the number of fluffs was measured at a measuring yarn speed of 107 m / min and a measuring yarn length of 1605 m. It is converted into the number of fluffs per 1 m. If the number of fluffs per 1 m is less than 20, the effect of the raised fluffs in forming a fabric structure is too small to contribute to the increase in the texture of the fabric, and the texture is no different from that of a normal twisted fabric. It is not preferable because it is lost. 1
When the number of fluffs per m is 20 or more, more preferably 50 or more, the appearance and texture of spun yarn can be imparted to the fabric made of multifilament yarn, which is very effective.

As shown in FIG. 1, the spun yarn-like multifilament yarn of the present invention is a yarn having an appropriate bulge composed of a polyester multifilament heterogeneous yarn Y and having a proper bulge. The fluffs 1 are randomly present, and the fluffs are substantially constrained by the actual twists inserted in the mixed fiber yarns.

Next, a method for producing the spun yarn-like multifilament yarn of the present invention will be described. The method for obtaining the polyester multi-filament heterogeneous-fineness mixed yarn used in the present invention is a method of directly obtaining the heterogeneous-fineness mixed yarn from the same spinning pack, or the drawn yarns having different fineness spun from different spinning packs at the same rate. A method of supplying and aligning or entanglement to obtain a mixed-fiber yarn of different fineness, or supplying undrawn yarn (UDY) and partially oriented yarn (POY) of different fineness spun from different spinning packs at the same rate. And the like, followed by drawing, or a method of supplying partially oriented yarns (POY) having different degrees of orientation and fineness at the same rate and aligning, and then drawing. Any of these methods can be used in the present invention. It is possible to obtain a polyester multi-filament yarn having different fineness. When producing the spun yarn-like multifilament yarn of the present invention, the polyester multifilament heterogeneity mixed yarn to be supplied has a yarn cutting strength of 4.0 g / d or more in the state of the mixed yarn before the yarn raising process. It is effective to maintain the practical strength after the yarn raising process. If the breaking strength is less than 4.0 g / d, the yarn processability is lowered and the yarn strength is lowered, resulting in poor passability in the subsequent process, which is not preferable.

Then, in order to insert a real twist into the polyester multifilament heterogeneous-fineness mixed yarn, after obtaining the polyester multifilament heterogeneous-fineness mixed yarn in advance, an ordinary twister such as an up twister, a ring twister, and a double twister is used. The twisting method is used, but it is more preferable to perform the treatment using a double twister from the viewpoint of process stability and operability. Further, when the mixed yarn of different fineness is twisted, it is possible to more effectively raise the yarn by twisting so that the fibers having a smaller fineness come to the outer layer portion of the twisted yarn.

Further, following the above twisting step, a multi-axis circumscribed friction false twisting device having a rough surface is introduced so that the false twisting twisting direction is opposite to the actual twist inserting direction of the mixed yarn. While untwisting the actual twist, cut the single fiber in a substantially untwisted state.
The raising method is preferable because it is an effective means because it suppresses excessive damage of the mixed filament yarn. With this means, the cut monofilament fluff is effectively returned by the number of twists inserted by the pretwisting effect due to the false twist untwisting effect, so that the yarn raising part is fixed by twisting and prevents loosening and fluff growth. Therefore, it is effective. The maximum single fiber fineness (d ₁ )
And the minimum single fiber fineness (d ₂ ) ratio d ₁ / d ₂ is 4 or more,
A polyester multifilament different fineness yarn having a minimum single fiber fineness of 0.8 denier or less is used.

Further, when the yarn raising process is performed, the fluff that easily floats is treated and bent by a guide or bar in the subsequent process, and the fluff is accumulated, which reduces the process passability such as yarn breakage and guide clogging. In addition, since the yarn unevenness is produced, it is possible to solve the above-mentioned problems by treating the yarn with a fluid such as air after the yarn raising process to remove the fluff that easily floats in advance. This fluid treatment may be either suction or jetting, and suction using an aspirator or the like is a preferable method for removing floating fibers, but compressed air flow is practically used in terms of cost and equipment. A method of spraying floating fibers is suitable. Further, by connecting the yarn raising process to the twisting process online, it is possible to obtain a spun yarn-like multifilament yarn at a lower cost, more efficiently, and more stably, which is preferable for use.

FIG. 2 is a three-axis circumscribed friction false twist in which the mixed yarn A of different fineness after the application of the actual twist is unwound from the turf twister spindle 2 and the rough yarn disc is arranged through the positive yarn feed guide 3. While untwisting the actual twist by the device 4, the single fiber is cut and raised in a substantially untwisted state, and the spun yarn-like multifilament yarn B is manufactured by the winder 6 through the positive type yarn supply guide 5. is there.

[0019]

【Example】

Example 1 After a polyester multifilament 42-denier 108 filament semi-filament round cross-section normal drawn yarn and a polyester multi-filament 50-denier 24 filament semi-diamond round cross-section normal drawn yarn were aligned at the same rate of supply to obtain a mixed fineness yarn, The mixed yarn is S with a double twister.
After twisting at 1000 T / m in the twisting direction, subsequently, online processing was carried out on the 3-axis circumscribed friction false twisting device shown in FIG. 2 in which three rough surface discs having an average surface roughness of 20 μ were arranged. Under the conditions described above, the yarn raising process was performed so that the false twisting direction was Z twist.

The spun yarn-like multifilament yarn obtained had a large number of fluffs randomly in the longitudinal direction of the yarn and had a suitable bulge. In addition, this spun yarn-like multifilament yarn had short fluffs, had few yarn spots in the yarn longitudinal direction, and had uniform yarn streaks. The obtained spun yarn-like multifilament yarn was used for both warp and weft,
After weaving into a plain weave, it was dyed. The obtained product had a spun silk-like texture, and the unevenness in the appearance was not noticeable, and the quality was excellent. Regarding the anti-pilling performance, ICI type pilling tester (JIS
As a result of measurement by L-1076), it was of a 4th to 5th grade level. The main physical properties of the obtained spun yarn-like multifilament yarn are shown in Table 1.

[0021]

[Table 1]

However, regarding the number of fluffs mentioned above, a multi-point fly counter (MOD
Using EL MFC-1110), the number of fluffs was measured at a measuring yarn speed of 107 m / min and a measuring yarn length of 1605 m, and the obtained value was 1 m.
It is converted to the number of fluffs per hit.

[0023]

As described above, the spun yarn-like multifilament yarn of the present invention randomly has fluffs such as spun yarns in the longitudinal direction, exhibits appropriate tension, waist and bulge, and the yarns in the longitudinal direction of the yarn. The streaks are uniform. Further, since the real twist is used as the focusing means, it is characterized in that unevenness such as unevenness and scraping, which is caused by a normal entanglement process, does not occur. In addition, since the thread stripes are smooth like raw filament threads, there is little variation in strength, and the effect of actual twisting can suppress the occurrence of pilling. Further, after obtaining the spun yarn-like multifilament yarn of the present invention by the above method, it is possible to further twist the fibers to further improve the above-mentioned effects. Further, due to the effect of the actual twist, it has a good drape property, and it is possible to improve the texture such as tension and waist. Further, the spun yarn-like multifilament yarn of the present invention has an appropriate bulge and has fluffs on the yarn side surface, and the fluffs are substantially restrained by actual twisting. It is a multifilament yarn having the appearance of, and when formed into a fabric, it is possible to impart appropriate tension and waist. Further, as a remarkable feature of the spun yarn-like multifilament yarn of the present invention, compared with a multifilament raised fabric obtained by an ordinary emery raising method or the like, the degree of raising is difficult to control, but excessive damage to the yarn is significantly caused. The basic mechanical properties of the woven fabric such as tear strength can be controlled so that it can be practically used. In addition, although conventional napped woven fabrics have only been available for medium-thick fabrics, the spun yarn-like multifilament yarn of the present invention has fluffs at random in the yarn itself, so it is also possible to develop into the field of thin woven fabrics. Is.

[Brief description of drawings]

FIG. 1 is a perspective view of a spun yarn-like multifilament yarn of the present invention.

FIG. 2 is a front view of an apparatus for producing spun yarn-like multifilament yarn according to the present invention.

[Explanation of symbols]

 A mixed yarn of different fineness B spun yarn-like multifilament yarn 1 fluff 4 triaxial circumscribed friction false twisting device

Claims (1)

[Claims] 1. A spun yarn-like multifilament yarn comprising polyester filaments having different single fiber fineness,
The fineness ratio between the polyester filament with the maximum single fiber fineness and the polyester filament with the minimum single fiber fineness is 4
Above, and the above-mentioned minimum single fiber fineness is 0.8 denier or less, and on the yarn surface of the spun yarn-like multifilament yarn, mainly 20 fluff / m or more of filaments having a single fiber fineness of 0.8 denier or less Yes, the fineness of the spun yarn-like multifilament yarn is 3000 / D as D denier
A spun yarn-like multifilament yarn having a twist number (T / m) of ^{1/2 to} 27,000 / D ^1/2 .