JPH06294035A - Production of spun composite bulky yarn - Google Patents

Abstract

PURPOSE:To provide the method for producing the spun composite bulky yarn, capable of effectively having the raw material characteristics of a spun yarn and a filament yarn, improved in the bulkiness and in the interlacing property, and enabling to be applied also to woodwork products. CONSTITUTION:This method for producing the spun composite bulky yarn comprises doubling a spun yarn containing thermoplastic fibers with a thermoplastic multi-filament yarn in a twisting number satisfying the below inequality and in the reverse direction to the twisting direction of the spun yarn, applying a false-twisting-crimping processing in the reverse direction to the twisting direction of the doubled yarn, and subsequently subjecting the produced composite false twisted yarn to a fluid stirring treatment. 0.1t<=T<=t wherein T is a doubling number (T/W) and (t) is the twisted number of the spun yarn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a spun composite bulky yarn in which spun yarns containing thermoplastic fibers and thermoplastic multifilament yarns are mixed and entangled.

[0002]

2. Description of the Related Art In the field of garments, diversification of materials has been eagerly awaited, and a new composite yarn with improved visual and tactile effects cannot be satisfied only by the appearance and texture of conventional yarns. Is expected to emerge.

When a spun yarn containing a thermoplastic fiber (hereinafter referred to as a spun yarn) and a thermoplastic multifilament yarn (hereinafter referred to as a long fiber yarn) are combined, a characteristic which cannot be obtained by a single yarn is added. It is well known that this is possible, and in view of this situation, many methods for producing a composite yarn in which spun yarn and long fiber yarn are mixed have been proposed. In addition, as the mixing method, various methods such as ply twisting, false twisting, and fluid treatment are adopted.

The applicant of the present invention has previously proposed, in Japanese Patent Laid-Open No. 173133/1985, a method for producing a composite yarn in which a spun yarn and a long fiber yarn are fluid-processed and mixed and entangled. The composite yarn obtained by this method can have the material characteristics of both yarns due to its mixed fiber effect, and the yarn form is such that the spun yarn and the long fiber yarn are entangled with each other, and the spun yarn is It has a joint part in which long fiber yarns are arranged in parallel.

However, in this entangled portion, it is difficult for the filaments of the long fiber yarn to bite into the inside of the yarn of the spun yarn that has been twisted and bundled, and an unstable entangled state is likely to occur.
Further, at the joint, it is almost in a state of being aligned in parallel and there is no substantial entanglement. Therefore, when such a yarn-shaped composite yarn is used, the entanglement is unraveled by the tension, ironing, etc. received in the higher-order processing, the two yarns are separated, and the yarn breakage is likely to occur, which hinders the weaving and weaving. However, this composite yarn was not practical because it had problems such as not only the deterioration of the product but also the deterioration of the product quality.

On the other hand, in the method in which spun yarn and long fiber yarn are combined and twisted into a mixed fiber composite yarn, handleability at the time of post-processing is good, and a yarn having the characteristics of both yarns is obtained. This method is widely used. However, with the ply-twist focusing, the span characteristics such as bulkiness and softness were halved, and the plait peculiar to ply-twisted yarns spoiled the product image, making it unsuitable for pouch products.

Further, Japanese Patent Publication No. Sho 55-26213 describes a method in which spun yarn and long fiber yarn are aligned and false twisted to form a mixed fiber composite yarn. In this method, a crimped yarn gives a processed yarn with high elasticity and bulkiness. However, since this method mixes spun yarn and long fiber yarn by the twisting and untwisting actions of false twisting, it is difficult to obtain a sufficient mixing effect, and the mixed fiber form It is not suitable for heather products.

[0008]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks and can effectively possess the material properties of spun yarn and long fiber yarn, and also improves bulkiness and entanglement, and improves the heathered products. It is a technical object to provide a method for producing a spun composite bulky yarn that can be applied to the above.

[0009]

Means for Solving the Problems As a result of intensive studies for solving the above problems, the present inventors have found that when a spun yarn and a long fiber yarn are subjected to fluid treatment By twisting both yarns in the untwisting direction and performing false twisting in the direction opposite to the twisting direction of this twisted yarn, the yarn is made stretchable and bulky, and the spun yarn is opened. The present inventors have reached the present invention by discovering that the fineness is improved, the mixed fiber entanglement with the long fiber yarn is further improved, and that a spun composite bulky yarn having a good combability, which cannot be obtained by a simple plied yarn, can be obtained.

That is, according to the present invention, when the spun yarn and the long fiber yarn are mixed with each other by fluid, the spun yarn and the heat are mixed in advance in a twist number within a range satisfying the following formula and in a direction opposite to the twist direction of the spun yarn. A span characterized in that after twisting with a plastic multifilament yarn, false twist crimping processing is performed in the direction opposite to the twisting direction of the twisted yarn, and the resulting composite false twisted yarn is subjected to fluid disturbance treatment. The gist is a method for producing a composite bulky yarn. 0.1t ≦ T ≦ t where T: number of twists (T / M) t: number of twists of spun yarn (T / M)

The present invention will be described in detail below.

According to the present invention, a spun composite bulky yarn is obtained by twisting a spun yarn and a long fiber yarn, subjecting them to false twist crimping, and subsequently subjecting them to fluid disturbance treatment. That is, when the spun yarn and the long fiber yarn are simply combined and subjected to fluid treatment as in the conventional case, it is difficult to mix the long fiber filament in the twisted and bundled spun yarn. The whole spun yarn is sandwiched, or the filaments of the spun yarn are entangled with long fiber filaments to be mixed and entangled. Therefore, such a mixed filament yarn is insufficient in entanglement, and the mixed filament form tends to result in a coarse heather.

In the present invention, the long fiber yarn is a mixed fiber entangled yarn in an entangled form in which the short fibers inside the yarn of the spun yarn are strongly entangled. Therefore, it is necessary to untwist the spun yarn that has been twisted and bundled to improve the openability during fluid perturbation. However, if the spun yarn is simply untwisted, not only will the strength of the spun yarn be reduced, but also short fibers will drop out or fall out. In the present invention, since the spun yarn and the continuous fiber yarn are twisted together, the untwisting of the spun yarn and the dropout or dropout caused by the untwisting action can be eliminated. Then, the twisting direction for this twisting is opposite to the twisting direction of the spun yarn, and the number of twisting is
It must be within the range that satisfies the above formula.

If the number of twists of the spun yarn and the long fiber yarn is less than 0.1 t, the untwisting effect of the spun yarn is poor, and the fiber opening effect at the time of fluid disturbing treatment cannot be expected, which is not preferable. Further, when the number of plied twists exceeds t, the plied twist is excessively added to the long fiber yarn itself, and the fiber-spreading action of the long fiber yarn itself is remarkably reduced during the fluid disturbance process, which impairs the mixed fiber entanglement property. Not preferable.

When the spun yarn and the continuous fiber yarn are twisted together with the number of twists in the above range, the actual twist of the spun yarn itself is released, and the short fibers constituting the spun yarn are aligned in parallel. It becomes possible to further improve the fiber-opening effect at the time of the fluid disturbance process later. If the short fibers come close to the parallel state, they may cause dropout or dropout during the fluid disturbance process, but the long fiber thread acts to suppress it, that is, it acts as a holding thread for the spun yarn, causing dropout or dropout. To be prevented.

The spun yarn used in the present invention is preferably a single yarn, but may be a double yarn. In the case of using twin yarns, if the double yarn twist (upward twist) is twisted in the opposite direction to the long fiber yarn, the twin yarn twist of the spun yarn will be released, and the effect of mixing fibers during fluid disturbing treatment will be enhanced. Is possible.

When the spun yarn and the long fiber yarn are twisted together as described above, the actual twist of the spun yarn can be released and the opening of the spun yarn can be promoted. Twisting may be added, which may interfere with the opening action of the long fiber yarn itself. Therefore, it is desirable to use the fine fiber yarn as long as possible so that the long-fiber yarn has a twist angle in a range that does not prevent the opening operation even when the twisted twist is added. In addition, long-fiber yarn is untwisted
A yarn having a twist of the T / M level is preferably used, and in the case of having the yarn twist, a yarn having a twist in the same direction as the twist of the spun yarn is preferable.

Next, in the present invention, a false twist crimping process is applied to the composite yarn of the spun yarn and the long fiber yarn obtained above to impart stretchability and bulkiness to the yarn. As described above, in the present invention, since false twist crimping processing is applied to the plied yarn, the multifilament yarn made of thermoplastic fiber is used as the long fiber yarn constituting the plied yarn.
Further, it is necessary to use a spun yarn containing at least a thermoplastic fiber.

In the above false twist crimping process, it is necessary to perform twisting in the direction opposite to the twisting direction of the plied yarn, and as compared with the case of twisting in the same direction as the twisted direction of the plied yarn,
A composite false twisted yarn having greater stretchability and bulkiness can be obtained. That is, when the false twist direction is opposite to the twist direction of the false twisted yarn, overtwisting is performed by the amount obtained by subtracting the false twist number from the false twist number in the twisting zone, and heat fixing is performed. When the number of twists is untwisted and the number of twists is restored to the state of the number of twists, the coil diameter increases significantly, and it becomes extremely stretchable and bulky. Further, the false twisted crimped double twisted yarn has an effect of accelerating the opening action at the time of the fluid perturbation treatment in the subsequent step because voids are formed between the constituent fibers by the crimping action.
The processing conditions such as the number of false twists and the heater temperature during false twist crimping may be appropriately selected in consideration of the fineness of the plied yarn, material characteristics, and the like.

In the present invention, the composite false-twisted yarn obtained above is subjected to a fluid disturbing treatment to obtain an intended spun composite bulky yarn.

The spun composite bulky yarn obtained by the present invention, as shown in FIG. 2, has a coil-shaped waveform as a whole yarn,
The spun yarn A and the long fiber yarn B are twisted together, and the filament of the long fiber yarn bites into the spun yarn and is strongly entangled with the short fibers. Mixed fiber entangled portions (b) and the like sandwiched between filaments are randomly mixed and formed. Due to such a yarn form, the yarn as a whole has strong entanglement, excellent twist focusing, and excellent post-workability. Also,
Since the filaments of the long fiber yarn are irregularly mixed with the spun yarn and the yarn form in which the spun yarn and the long fiber yarn are twisted and mixed, the spun yarn A and the long fiber yarn having different dyeability are obtained. If B is selected, a spun composite high-loft yarn which is a heap-shaped fabric with good heatheriness and good elegance can be obtained.

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a schematic process diagram showing an embodiment of the present invention. In FIG. 1, a spun yarn 1 in which a spun yarn and a long fiber yarn are pre-twisted in a predetermined number of twists in a twist direction is supplied to a false twist area by a supply roller 2 and twisted by a twisting device 4. While being heat-fixed by the heater 3, it is then untwisted and subjected to false twist crimping. Subsequently, the yarn after the false twist crimping is supplied to the fluid treatment area by the first take-up roller 5, the fluid disturbing process is performed by the fluid disturbing nozzle 6, and the yarn is wound on the take-up bobbin 8 via the second take-up roller 7. .

The spun yarn to be used in the present invention may be any thermoplastic fiber or one containing a thermoplastic fiber, but from the viewpoint of enhancing the fiber opening effect at the time of ply twisting and fluid disturbance treatment, a sweet twist spun yarn is used. It is preferably used. As the long fiber yarn, a thermoplastic multifilament yarn is used, but a yarn having a large number of filaments is preferable from the viewpoint of improving the mixed fiber entanglement.

The twisting device used for the false twist crimping process is not particularly limited, but it is preferable to use a fluid swirling nozzle from the viewpoint of preventing the spun yarn from falling and scattering.

Further, the fluid disturbing nozzle used in the fluid disturbing process is not particularly limited, and an interlace nozzle or a Taslan nozzle is preferably used. Further, the air pressure of the fluid disturbing nozzle and the overfeed rate of the plied yarn may be appropriately selected in consideration of the fineness of the plied yarn, the number of plied yarns, and the like.

[0027]

EXAMPLES Next, the present invention will be specifically described by way of examples.

Example 1 Polyethylene terephthalate spun yarn having a twist number of 700 T / M (Z) (English number 40 = 132.8 d) and polyethylene terephthalate continuous fiber yarn having a twist number of 50 d / 36 f were used and twisted by a twisting machine. Both yarns were plied with several 350 T / M (S). This plied yarn was subjected to false twist crimping processing and fluid disturbance treatment under the conditions shown in Table 1 according to the manufacturing process of FIG. 1 to obtain a spun composite bulky yarn having the form shown in FIG.

The spun composite bulky yarn obtained without false omission or loss during the false twist crimping process and the fluid disturbing process was a spun yarn and a long fiber yarn, which were mixed and entangled as one unit. . This spun composite bulky yarn was used as a warp and weft to weave into a flat design, and then subjected to dyeing finishing. The unwindability of the yarn was good, there were no problems during weaving, and the resulting woven fabric was rich in stretchability and bulkiness, and was excellent in swelling and heat retention.

Example 2 Polyethylene terephthalate having a twist number of 650 T / M (Z) /
50% cotton (50/50%) mixed spun yarn (English count 30 = 177d)
Using a cation dyeable polyester yarn of d / 12f, both yarns were twisted with a twisting machine at a twisting number of 300 T / M (S). According to the manufacturing process of FIG. 1, the false twisted yarn was subjected to false twist crimping process and fluid disturbance treatment under the conditions shown in Table 1 to obtain a spun composite bulky yarn.

The obtained spun composite bulky yarn was made into a woven fabric,
When a different color dyeing finish using disperse dyes, direct dyes and cationic dyes was applied, a new heathered product was obtained, which had a fluffy mercerized cotton-like texture and had a smooth feel.

[0032]

[Table 1]

[0033]

EFFECTS OF THE INVENTION According to the present invention, a spun yarn and a filament yarn which are twisted and bundled are twisted in a predetermined number of twists and a predetermined twisting direction, and then false twist crimping is performed, and then a fluid disturbing treatment is performed. Due to the crimping action imparted by the false twist crimping process, voids are formed between the fibers, and the spun yarn is untwisted, and the fluid disturbing treatment is applied. Therefore, during fluid disturbing treatment, The openness of the spun yarn is enhanced, the mixed fiber entanglement is further improved, and a spun composite bulky yarn excellent in high-order processability can be obtained. In addition, it is possible to obtain a spun composite bulky yarn which can effectively have the material characteristics of spun yarn and long fiber yarn, has excellent bulkiness, and is suitable for heathered products and has good weftability.

[Brief description of drawings]

FIG. 1 is a schematic process drawing showing one embodiment of a method for producing a spun composite bulky yarn of the present invention.

FIG. 2 is a schematic view showing the appearance of a spun composite bulky yarn obtained by the present invention.

[Explanation of symbols]

 A spun yarn B long fiber yarn a mixed fiber entangled part b mixed fiber entangled part 1 mixed twisted yarn 3 heater 4 twisting device 6 fluid disturbing nozzle 8 winding bobbin

Claims (1)

[Claims] 1. When a spun yarn containing a thermoplastic fiber and a thermoplastic multifilament yarn are mixed with a fluid, the spun yarn is spun in a direction opposite to the twist direction of the spun yarn, in advance, in a number of twists satisfying the following formula. Characterized by twisting a yarn and a thermoplastic multifilament yarn, performing false twist crimping in a direction opposite to the twist direction of the twisted yarn, and subsequently subjecting the obtained composite false twisted yarn to fluid disturbance treatment And a method for producing a spun composite bulky yarn. 0.1t ≦ T ≦ t where T: number of twists (T / M) t: number of twists of spun yarn (T / M)